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
  96         /* initialize lru data */
  97         atomic_set(&sbi->ll_cache.ccc_users, 0);
  98         sbi->ll_cache.ccc_lru_max = lru_page_max;
  99         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 100         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 101         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 102
 103         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 104                                            SBI_DEFAULT_READAHEAD_MAX);
 105         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 106         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 107                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 108         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 109         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 110
 111         ll_generate_random_uuid(uuid);
 112         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 113         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 114
 115         spin_lock(&ll_sb_lock);
 116         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 117         spin_unlock(&ll_sb_lock);
 118
 119         sbi->ll_flags |= LL_SBI_VERBOSE;
 120         sbi->ll_flags |= LL_SBI_CHECKSUM;
 121
 122         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 123
 124         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 125                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 126                                pp_r_hist.oh_lock);
 127                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 128                                pp_w_hist.oh_lock);
 129         }
 130
 131         /* metadata statahead is enabled by default */
 132         sbi->ll_sa_max = LL_SA_RPC_DEF;
 133         atomic_set(&sbi->ll_sa_total, 0);
 134         atomic_set(&sbi->ll_sa_wrong, 0);
 135         atomic_set(&sbi->ll_agl_total, 0);
 136         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 137
 138         return sbi;
 139 }
 140
 141 static void ll_free_sbi(struct super_block *sb)
 142 {
 143         struct ll_sb_info *sbi = ll_s2sbi(sb);
 144
 145         if (sbi != NULL) {
 146                 spin_lock(&ll_sb_lock);
 147                 list_del(&sbi->ll_list);
 148                 spin_unlock(&ll_sb_lock);
 149                 OBD_FREE(sbi, sizeof(*sbi));
 150         }
 151 }
 152
 153 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 154                                     struct vfsmount *mnt)
 155 {
 156         struct inode *root = NULL;
 157         struct ll_sb_info *sbi = ll_s2sbi(sb);
 158         struct obd_device *obd;
 159         struct obd_capa *oc = NULL;
 160         struct obd_statfs *osfs = NULL;
 161         struct ptlrpc_request *request = NULL;
 162         struct obd_connect_data *data = NULL;
 163         struct obd_uuid *uuid;
 164         struct md_op_data *op_data;
 165         struct lustre_md lmd;
 166         u64 valid;
 167         int size, err, checksum;
 168
 169         obd = class_name2obd(md);
 170         if (!obd) {
 171                 CERROR("MD %s: not setup or attached\n", md);
 172                 return -EINVAL;
 173         }
 174
 175         data = kzalloc(sizeof(*data), GFP_NOFS);
 176         if (!data)
 177                 return -ENOMEM;
 178
 179         osfs = kzalloc(sizeof(*osfs), GFP_NOFS);
 180         if (!osfs) {
 181                 OBD_FREE_PTR(data);
 182                 return -ENOMEM;
 183         }
 184
 185         if (proc_lustre_fs_root) {
 186                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 187                                                   dt, md);
 188                 if (err < 0)
 189                         CERROR("could not register mount in /proc/fs/lustre\n");
 190         }
 191
 192         /* indicate the features supported by this client */
 193         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 194                                   OBD_CONNECT_ATTRFID  |
 195                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 196                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 197                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 198                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 199                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 200                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 201                                   OBD_CONNECT_EINPROGRESS |
 202                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 203                                   OBD_CONNECT_LAYOUTLOCK |
 204                                   OBD_CONNECT_PINGLESS |
 205                                   OBD_CONNECT_MAX_EASIZE |
 206                                   OBD_CONNECT_FLOCK_DEAD |
 207                                   OBD_CONNECT_DISP_STRIPE;
 208
 209         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 210                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 211
 212         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 213                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 214 #ifdef CONFIG_FS_POSIX_ACL
 215         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 216 #endif
 217
 218         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 219                 /* flag mdc connection as lightweight, only used for test
 220                  * purpose, use with care */
 221                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 222
 223         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 224         data->ocd_version = LUSTRE_VERSION_CODE;
 225
 226         if (sb->s_flags & MS_RDONLY)
 227                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 228         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 229                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 230
 231 #ifdef HAVE_MS_FLOCK_LOCK
 232         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 233         sb->s_flags |= MS_FLOCK_LOCK;
 234 #endif
 235 #ifdef MS_HAS_NEW_AOPS
 236         sb->s_flags |= MS_HAS_NEW_AOPS;
 237 #endif
 238
 239         if (sbi->ll_flags & LL_SBI_FLOCK)
 240                 sbi->ll_fop = &ll_file_operations_flock;
 241         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 242                 sbi->ll_fop = &ll_file_operations;
 243         else
 244                 sbi->ll_fop = &ll_file_operations_noflock;
 245
 246         /* real client */
 247         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 248         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 249                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 250
 251         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 252
 253         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid,
 254                           data, NULL);
 255         if (err == -EBUSY) {
 256                 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",
 257                                    md);
 258                 goto out;
 259         } else if (err) {
 260                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 261                 goto out;
 262         }
 263
 264         sbi->ll_md_exp->exp_connect_data = *data;
 265
 266         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 267                            LUSTRE_SEQ_METADATA);
 268         if (err) {
 269                 CERROR("%s: Can't init metadata layer FID infrastructure, rc = %d\n",
 270                        sbi->ll_md_exp->exp_obd->obd_name, err);
 271                 goto out_md;
 272         }
 273
 274         /* For mount, we only need fs info from MDT0, and also in DNE, it
 275          * can make sure the client can be mounted as long as MDT0 is
 276          * available */
 277         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 278                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 279                         OBD_STATFS_FOR_MDT0);
 280         if (err)
 281                 goto out_md_fid;
 282
 283         /* This needs to be after statfs to ensure connect has finished.
 284          * Note that "data" does NOT contain the valid connect reply.
 285          * If connecting to a 1.8 server there will be no LMV device, so
 286          * we can access the MDC export directly and exp_connect_flags will
 287          * be non-zero, but if accessing an upgraded 2.1 server it will
 288          * have the correct flags filled in.
 289          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 290         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 291         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 292             valid != CLIENT_CONNECT_MDT_REQD) {
 293                 char *buf;
 294
 295                 buf = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
 296                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 297                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 298                 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",
 299                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 300                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 301                 err = -EPROTO;
 302                 goto out_md_fid;
 303         }
 304
 305         size = sizeof(*data);
 306         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 307                            KEY_CONN_DATA,  &size, data, NULL);
 308         if (err) {
 309                 CERROR("%s: Get connect data failed: rc = %d\n",
 310                        sbi->ll_md_exp->exp_obd->obd_name, err);
 311                 goto out_md_fid;
 312         }
 313
 314         LASSERT(osfs->os_bsize);
 315         sb->s_blocksize = osfs->os_bsize;
 316         sb->s_blocksize_bits = log2(osfs->os_bsize);
 317         sb->s_magic = LL_SUPER_MAGIC;
 318         sb->s_maxbytes = MAX_LFS_FILESIZE;
 319         sbi->ll_namelen = osfs->os_namelen;
 320         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 321
 322         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 323             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 324                 LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
 325                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 326         }
 327
 328         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 329 #ifdef MS_POSIXACL
 330                 sb->s_flags |= MS_POSIXACL;
 331 #endif
 332                 sbi->ll_flags |= LL_SBI_ACL;
 333         } else {
 334                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 335 #ifdef MS_POSIXACL
 336                 sb->s_flags &= ~MS_POSIXACL;
 337 #endif
 338                 sbi->ll_flags &= ~LL_SBI_ACL;
 339         }
 340
 341         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 342                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 343                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 344                         LCONSOLE_INFO("client is set as remote by default.\n");
 345                 }
 346         } else {
 347                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 348                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 349                         LCONSOLE_INFO("client claims to be remote, but server rejected, forced to be local.\n");
 350                 }
 351         }
 352
 353         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 354                 LCONSOLE_INFO("client enabled MDS capability!\n");
 355                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 356         }
 357
 358         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 359                 LCONSOLE_INFO("client enabled OSS capability!\n");
 360                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 361         }
 362
 363         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 364                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 365
 366         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 367                 sbi->ll_md_brw_size = data->ocd_brw_size;
 368         else
 369                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 370
 371         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 372                 LCONSOLE_INFO("Layout lock feature supported.\n");
 373                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 374         }
 375
 376         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 377                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 378                         LCONSOLE_INFO(
 379                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 380                                 dt);
 381                 } else {
 382                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 383                         sbi->ll_xattr_cache_enabled = 1;
 384                 }
 385         }
 386
 387         obd = class_name2obd(dt);
 388         if (!obd) {
 389                 CERROR("DT %s: not setup or attached\n", dt);
 390                 err = -ENODEV;
 391                 goto out_md_fid;
 392         }
 393
 394         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 395                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 396                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 397                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 398                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 399                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 400                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 401                                   OBD_CONNECT_MAXBYTES |
 402                                   OBD_CONNECT_EINPROGRESS |
 403                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 404                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 405
 406         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 407                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 408
 409         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 410                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 411                  * disabled by default, because it can still be enabled on the
 412                  * fly via /proc. As a consequence, we still need to come to an
 413                  * agreement on the supported algorithms at connect time */
 414                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 415
 416                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 417                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 418                 else
 419                         data->ocd_cksum_types = cksum_types_supported_client();
 420         }
 421
 422         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 423         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 424                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 425
 426         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d ocd_grant: %d\n",
 427                data->ocd_connect_flags,
 428                data->ocd_version, data->ocd_grant);
 429
 430         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 431         obd->obd_upcall.onu_upcall = cl_ocd_update;
 432
 433         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 434
 435         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 436                           NULL);
 437         if (err == -EBUSY) {
 438                 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",
 439                                    dt);
 440                 goto out_md;
 441         } else if (err) {
 442                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 443                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 444                 goto out_md;
 445         }
 446
 447         sbi->ll_dt_exp->exp_connect_data = *data;
 448
 449         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 450                            LUSTRE_SEQ_METADATA);
 451         if (err) {
 452                 CERROR("%s: Can't init data layer FID infrastructure, rc = %d\n",
 453                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 454                 goto out_dt;
 455         }
 456
 457         mutex_lock(&sbi->ll_lco.lco_lock);
 458         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 459         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 460         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 461         mutex_unlock(&sbi->ll_lco.lco_lock);
 462
 463         fid_zero(&sbi->ll_root_fid);
 464         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 465         if (err) {
 466                 CERROR("cannot mds_connect: rc = %d\n", err);
 467                 goto out_lock_cn_cb;
 468         }
 469         if (!fid_is_sane(&sbi->ll_root_fid)) {
 470                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 471                        sbi->ll_md_exp->exp_obd->obd_name,
 472                        PFID(&sbi->ll_root_fid));
 473                 err = -EINVAL;
 474                 goto out_lock_cn_cb;
 475         }
 476         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 477
 478         sb->s_op = &lustre_super_operations;
 479 #if THREAD_SIZE >= 8192 /*b=17630*/
 480         sb->s_export_op = &lustre_export_operations;
 481 #endif
 482
 483         /* make root inode
 484          * XXX: move this to after cbd setup? */
 485         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 486         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 487                 valid |= OBD_MD_FLRMTPERM;
 488         else if (sbi->ll_flags & LL_SBI_ACL)
 489                 valid |= OBD_MD_FLACL;
 490
 491         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 492         if (!op_data) {
 493                 err = -ENOMEM;
 494                 goto out_lock_cn_cb;
 495         }
 496
 497         op_data->op_fid1 = sbi->ll_root_fid;
 498         op_data->op_mode = 0;
 499         op_data->op_capa1 = oc;
 500         op_data->op_valid = valid;
 501
 502         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 503         if (oc)
 504                 capa_put(oc);
 505         OBD_FREE_PTR(op_data);
 506         if (err) {
 507                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 508                        sbi->ll_md_exp->exp_obd->obd_name, err);
 509                 goto out_lock_cn_cb;
 510         }
 511
 512         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 513                                sbi->ll_md_exp, &lmd);
 514         if (err) {
 515                 CERROR("failed to understand root inode md: rc = %d\n", err);
 516                 ptlrpc_req_finished(request);
 517                 goto out_lock_cn_cb;
 518         }
 519
 520         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 521         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 522                                             sbi->ll_flags & LL_SBI_32BIT_API),
 523                        &lmd);
 524         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 525         ptlrpc_req_finished(request);
 526
 527         if (root == NULL || IS_ERR(root)) {
 528                 if (lmd.lsm)
 529                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 530 #ifdef CONFIG_FS_POSIX_ACL
 531                 if (lmd.posix_acl) {
 532                         posix_acl_release(lmd.posix_acl);
 533                         lmd.posix_acl = NULL;
 534                 }
 535 #endif
 536                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 537                 root = NULL;
 538                 CERROR("lustre_lite: bad iget4 for root\n");
 539                 goto out_root;
 540         }
 541
 542         err = ll_close_thread_start(&sbi->ll_lcq);
 543         if (err) {
 544                 CERROR("cannot start close thread: rc %d\n", err);
 545                 goto out_root;
 546         }
 547
 548 #ifdef CONFIG_FS_POSIX_ACL
 549         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 550                 rct_init(&sbi->ll_rct);
 551                 et_init(&sbi->ll_et);
 552         }
 553 #endif
 554
 555         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 556         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 557                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 558                                  NULL);
 559         cl_sb_init(sb);
 560
 561         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 562                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 563                                  &sbi->ll_cache, NULL);
 564
 565         sb->s_root = d_make_root(root);
 566         if (sb->s_root == NULL) {
 567                 CERROR("%s: can't make root dentry\n",
 568                         ll_get_fsname(sb, NULL, 0));
 569                 err = -ENOMEM;
 570                 goto out_lock_cn_cb;
 571         }
 572
 573         sbi->ll_sdev_orig = sb->s_dev;
 574
 575         /* We set sb->s_dev equal on all lustre clients in order to support
 576          * NFS export clustering.  NFSD requires that the FSID be the same
 577          * on all clients. */
 578         /* s_dev is also used in lt_compare() to compare two fs, but that is
 579          * only a node-local comparison. */
 580         uuid = obd_get_uuid(sbi->ll_md_exp);
 581         if (uuid != NULL) {
 582                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 583                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 584         }
 585
 586         if (data != NULL)
 587                 OBD_FREE_PTR(data);
 588         if (osfs != NULL)
 589                 OBD_FREE_PTR(osfs);
 590
 591         return err;
 592 out_root:
 593         iput(root);
 594 out_lock_cn_cb:
 595         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 596 out_dt:
 597         obd_disconnect(sbi->ll_dt_exp);
 598         sbi->ll_dt_exp = NULL;
 599         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 600         obd_zombie_barrier();
 601 out_md_fid:
 602         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 603 out_md:
 604         obd_disconnect(sbi->ll_md_exp);
 605         sbi->ll_md_exp = NULL;
 606 out:
 607         if (data != NULL)
 608                 OBD_FREE_PTR(data);
 609         if (osfs != NULL)
 610                 OBD_FREE_PTR(osfs);
 611         lprocfs_unregister_mountpoint(sbi);
 612         return err;
 613 }
 614
 615 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 616 {
 617         int size, rc;
 618
 619         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 620         size = sizeof(int);
 621         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 622                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 623         if (rc)
 624                 CERROR("Get max mdsize error rc %d \n", rc);
 625
 626         return rc;
 627 }
 628
 629 int ll_get_default_mdsize(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_DEFAULT_EASIZE),
 635                          KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 636         if (rc)
 637                 CERROR("Get default mdsize error rc %d\n", rc);
 638
 639         return rc;
 640 }
 641
 642 int ll_get_max_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_MAX_COOKIESIZE),
 648                           KEY_MAX_COOKIESIZE, &size, lmmsize, NULL);
 649         if (rc)
 650                 CERROR("Get max cookiesize error rc %d\n", rc);
 651
 652         return rc;
 653 }
 654
 655 int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 656 {
 657         int size, rc;
 658
 659         size = sizeof(int);
 660         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_COOKIESIZE),
 661                           KEY_DEFAULT_COOKIESIZE, &size, lmmsize, NULL);
 662         if (rc)
 663                 CERROR("Get default cookiesize error rc %d\n", rc);
 664
 665         return rc;
 666 }
 667
 668 static void client_common_put_super(struct super_block *sb)
 669 {
 670         struct ll_sb_info *sbi = ll_s2sbi(sb);
 671
 672 #ifdef CONFIG_FS_POSIX_ACL
 673         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 674                 et_fini(&sbi->ll_et);
 675                 rct_fini(&sbi->ll_rct);
 676         }
 677 #endif
 678
 679         ll_close_thread_shutdown(sbi->ll_lcq);
 680
 681         cl_sb_fini(sb);
 682
 683         list_del(&sbi->ll_conn_chain);
 684
 685         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 686         obd_disconnect(sbi->ll_dt_exp);
 687         sbi->ll_dt_exp = NULL;
 688         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 689          * see LU-2543. */
 690         obd_zombie_barrier();
 691
 692         lprocfs_unregister_mountpoint(sbi);
 693
 694         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 695         obd_disconnect(sbi->ll_md_exp);
 696         sbi->ll_md_exp = NULL;
 697 }
 698
 699 void ll_kill_super(struct super_block *sb)
 700 {
 701         struct ll_sb_info *sbi;
 702
 703         /* not init sb ?*/
 704         if (!(sb->s_flags & MS_ACTIVE))
 705                 return;
 706
 707         sbi = ll_s2sbi(sb);
 708         /* we need to restore s_dev from changed for clustered NFS before
 709          * put_super because new kernels have cached s_dev and change sb->s_dev
 710          * in put_super not affected real removing devices */
 711         if (sbi) {
 712                 sb->s_dev = sbi->ll_sdev_orig;
 713                 sbi->ll_umounting = 1;
 714         }
 715 }
 716
 717 static inline int ll_set_opt(const char *opt, char *data, int fl)
 718 {
 719         if (strncmp(opt, data, strlen(opt)) != 0)
 720                 return 0;
 721         else
 722                 return fl;
 723 }
 724
 725 /* non-client-specific mount options are parsed in lmd_parse */
 726 static int ll_options(char *options, int *flags)
 727 {
 728         int tmp;
 729         char *s1 = options, *s2;
 730
 731         if (!options)
 732                 return 0;
 733
 734         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 735
 736         while (*s1) {
 737                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 738                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 739                 if (tmp) {
 740                         *flags |= tmp;
 741                         goto next;
 742                 }
 743                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 744                 if (tmp) {
 745                         *flags |= tmp;
 746                         goto next;
 747                 }
 748                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 749                 if (tmp) {
 750                         *flags |= tmp;
 751                         goto next;
 752                 }
 753                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 754                 if (tmp) {
 755                         *flags &= ~tmp;
 756                         goto next;
 757                 }
 758                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 759                 if (tmp) {
 760                         *flags |= tmp;
 761                         goto next;
 762                 }
 763                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 764                 if (tmp) {
 765                         *flags &= ~tmp;
 766                         goto next;
 767                 }
 768                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 769                 if (tmp) {
 770                         *flags |= tmp;
 771                         goto next;
 772                 }
 773                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 774                 if (tmp) {
 775                         *flags |= tmp;
 776                         goto next;
 777                 }
 778                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 779                 if (tmp) {
 780                         *flags &= ~tmp;
 781                         goto next;
 782                 }
 783
 784                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 785                 if (tmp) {
 786                         *flags |= tmp;
 787                         goto next;
 788                 }
 789                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 790                 if (tmp) {
 791                         *flags &= ~tmp;
 792                         goto next;
 793                 }
 794                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 795                 if (tmp) {
 796                         *flags |= tmp;
 797                         goto next;
 798                 }
 799                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 800                 if (tmp) {
 801                         *flags &= ~tmp;
 802                         goto next;
 803                 }
 804                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 805                 if (tmp) {
 806                         *flags |= tmp;
 807                         goto next;
 808                 }
 809                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 810                 if (tmp) {
 811                         *flags &= ~tmp;
 812                         goto next;
 813                 }
 814                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 815                 if (tmp) {
 816                         *flags |= tmp;
 817                         goto next;
 818                 }
 819                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 820                 if (tmp) {
 821                         *flags |= tmp;
 822                         goto next;
 823                 }
 824                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 825                 if (tmp) {
 826                         *flags |= tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 830                 if (tmp) {
 831                         *flags &= ~tmp;
 832                         goto next;
 833                 }
 834                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 835                                    s1);
 836                 return -EINVAL;
 837
 838 next:
 839                 /* Find next opt */
 840                 s2 = strchr(s1, ',');
 841                 if (s2 == NULL)
 842                         break;
 843                 s1 = s2 + 1;
 844         }
 845         return 0;
 846 }
 847
 848 void ll_lli_init(struct ll_inode_info *lli)
 849 {
 850         lli->lli_inode_magic = LLI_INODE_MAGIC;
 851         lli->lli_flags = 0;
 852         lli->lli_ioepoch = 0;
 853         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 854         spin_lock_init(&lli->lli_lock);
 855         lli->lli_posix_acl = NULL;
 856         lli->lli_remote_perms = NULL;
 857         mutex_init(&lli->lli_rmtperm_mutex);
 858         /* Do not set lli_fid, it has been initialized already. */
 859         fid_zero(&lli->lli_pfid);
 860         INIT_LIST_HEAD(&lli->lli_close_list);
 861         INIT_LIST_HEAD(&lli->lli_oss_capas);
 862         atomic_set(&lli->lli_open_count, 0);
 863         lli->lli_mds_capa = NULL;
 864         lli->lli_rmtperm_time = 0;
 865         lli->lli_pending_och = NULL;
 866         lli->lli_mds_read_och = NULL;
 867         lli->lli_mds_write_och = NULL;
 868         lli->lli_mds_exec_och = NULL;
 869         lli->lli_open_fd_read_count = 0;
 870         lli->lli_open_fd_write_count = 0;
 871         lli->lli_open_fd_exec_count = 0;
 872         mutex_init(&lli->lli_och_mutex);
 873         spin_lock_init(&lli->lli_agl_lock);
 874         lli->lli_has_smd = false;
 875         spin_lock_init(&lli->lli_layout_lock);
 876         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 877         lli->lli_clob = NULL;
 878
 879         init_rwsem(&lli->lli_xattrs_list_rwsem);
 880         mutex_init(&lli->lli_xattrs_enq_lock);
 881
 882         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 883         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 884                 mutex_init(&lli->lli_readdir_mutex);
 885                 lli->lli_opendir_key = NULL;
 886                 lli->lli_sai = NULL;
 887                 spin_lock_init(&lli->lli_sa_lock);
 888                 lli->lli_opendir_pid = 0;
 889         } else {
 890                 mutex_init(&lli->lli_size_mutex);
 891                 lli->lli_symlink_name = NULL;
 892                 init_rwsem(&lli->lli_trunc_sem);
 893                 mutex_init(&lli->lli_write_mutex);
 894                 init_rwsem(&lli->lli_glimpse_sem);
 895                 lli->lli_glimpse_time = 0;
 896                 INIT_LIST_HEAD(&lli->lli_agl_list);
 897                 lli->lli_agl_index = 0;
 898                 lli->lli_async_rc = 0;
 899         }
 900         mutex_init(&lli->lli_layout_mutex);
 901 }
 902
 903 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 904 {
 905         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 906
 907         bdi->name = "lustre";
 908         return bdi_register(bdi, NULL, "lustre-%d",
 909                             atomic_inc_return(&ll_bdi_num));
 910 }
 911
 912 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 913 {
 914         struct lustre_profile *lprof = NULL;
 915         struct lustre_sb_info *lsi = s2lsi(sb);
 916         struct ll_sb_info *sbi;
 917         char  *dt = NULL, *md = NULL;
 918         char  *profilenm = get_profile_name(sb);
 919         struct config_llog_instance *cfg;
 920         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 921         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 922         int    err;
 923
 924         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 925
 926         cfg = kzalloc(sizeof(*cfg), GFP_NOFS);
 927         if (!cfg)
 928                 return -ENOMEM;
 929
 930         try_module_get(THIS_MODULE);
 931
 932         /* client additional sb info */
 933         lsi->lsi_llsbi = sbi = ll_init_sbi();
 934         if (!sbi) {
 935                 module_put(THIS_MODULE);
 936                 OBD_FREE_PTR(cfg);
 937                 return -ENOMEM;
 938         }
 939
 940         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 941         if (err)
 942                 goto out_free;
 943
 944         err = bdi_init(&lsi->lsi_bdi);
 945         if (err)
 946                 goto out_free;
 947         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 948         lsi->lsi_bdi.capabilities = 0;
 949         err = ll_bdi_register(&lsi->lsi_bdi);
 950         if (err)
 951                 goto out_free;
 952
 953         sb->s_bdi = &lsi->lsi_bdi;
 954         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 955         sb->s_d_op = &ll_d_ops;
 956
 957         /* Generate a string unique to this super, in case some joker tries
 958            to mount the same fs at two mount points.
 959            Use the address of the super itself.*/
 960         cfg->cfg_instance = sb;
 961         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 962         cfg->cfg_callback = class_config_llog_handler;
 963         /* set up client obds */
 964         err = lustre_process_log(sb, profilenm, cfg);
 965         if (err < 0) {
 966                 CERROR("Unable to process log: %d\n", err);
 967                 goto out_free;
 968         }
 969
 970         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 971         lprof = class_get_profile(profilenm);
 972         if (lprof == NULL) {
 973                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be read from the MGS.  Does that filesystem exist?\n",
 974                                    profilenm);
 975                 err = -EINVAL;
 976                 goto out_free;
 977         }
 978         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 979                lprof->lp_md, lprof->lp_dt);
 980
 981         dt = kzalloc(strlen(lprof->lp_dt) + instlen + 2, GFP_NOFS);
 982         if (!dt) {
 983                 err = -ENOMEM;
 984                 goto out_free;
 985         }
 986         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
 987
 988         md = kzalloc(strlen(lprof->lp_md) + instlen + 2, GFP_NOFS);
 989         if (!md) {
 990                 err = -ENOMEM;
 991                 goto out_free;
 992         }
 993         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
 994
 995         /* connections, registrations, sb setup */
 996         err = client_common_fill_super(sb, md, dt, mnt);
 997
 998 out_free:
 999         if (md)
1000                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1001         if (dt)
1002                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1003         if (err)
1004                 ll_put_super(sb);
1005         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1006                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1007
1008         OBD_FREE_PTR(cfg);
1009         return err;
1010 } /* ll_fill_super */
1011
1012 void ll_put_super(struct super_block *sb)
1013 {
1014         struct config_llog_instance cfg, params_cfg;
1015         struct obd_device *obd;
1016         struct lustre_sb_info *lsi = s2lsi(sb);
1017         struct ll_sb_info *sbi = ll_s2sbi(sb);
1018         char *profilenm = get_profile_name(sb);
1019         int next, force = 1;
1020
1021         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1022
1023         ll_print_capa_stat(sbi);
1024
1025         cfg.cfg_instance = sb;
1026         lustre_end_log(sb, profilenm, &cfg);
1027
1028         params_cfg.cfg_instance = sb;
1029         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1030
1031         if (sbi->ll_md_exp) {
1032                 obd = class_exp2obd(sbi->ll_md_exp);
1033                 if (obd)
1034                         force = obd->obd_force;
1035         }
1036
1037         /* We need to set force before the lov_disconnect in
1038            lustre_common_put_super, since l_d cleans up osc's as well. */
1039         if (force) {
1040                 next = 0;
1041                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1042                                                      &next)) != NULL) {
1043                         obd->obd_force = force;
1044                 }
1045         }
1046
1047         if (sbi->ll_lcq) {
1048                 /* Only if client_common_fill_super succeeded */
1049                 client_common_put_super(sb);
1050         }
1051
1052         next = 0;
1053         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1054                 class_manual_cleanup(obd);
1055
1056         if (sbi->ll_flags & LL_SBI_VERBOSE)
1057                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1058
1059         if (profilenm)
1060                 class_del_profile(profilenm);
1061
1062         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1063                 bdi_destroy(&lsi->lsi_bdi);
1064                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1065         }
1066
1067         ll_free_sbi(sb);
1068         lsi->lsi_llsbi = NULL;
1069
1070         lustre_common_put_super(sb);
1071
1072         module_put(THIS_MODULE);
1073 } /* client_put_super */
1074
1075 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1076 {
1077         struct inode *inode = NULL;
1078
1079         /* NOTE: we depend on atomic igrab() -bzzz */
1080         lock_res_and_lock(lock);
1081         if (lock->l_resource->lr_lvb_inode) {
1082                 struct ll_inode_info *lli;
1083
1084                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1085                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1086                         inode = igrab(lock->l_resource->lr_lvb_inode);
1087                 } else {
1088                         inode = lock->l_resource->lr_lvb_inode;
1089                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1090                                          D_WARNING, lock, "lr_lvb_inode %p is bogus: magic %08x",
1091                                          lock->l_resource->lr_lvb_inode,
1092                                          lli->lli_inode_magic);
1093                         inode = NULL;
1094                 }
1095         }
1096         unlock_res_and_lock(lock);
1097         return inode;
1098 }
1099
1100 void ll_clear_inode(struct inode *inode)
1101 {
1102         struct ll_inode_info *lli = ll_i2info(inode);
1103         struct ll_sb_info *sbi = ll_i2sbi(inode);
1104
1105         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1106                inode->i_generation, inode);
1107
1108         if (S_ISDIR(inode->i_mode)) {
1109                 /* these should have been cleared in ll_file_release */
1110                 LASSERT(lli->lli_opendir_key == NULL);
1111                 LASSERT(lli->lli_sai == NULL);
1112                 LASSERT(lli->lli_opendir_pid == 0);
1113         }
1114
1115         spin_lock(&lli->lli_lock);
1116         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1117         spin_unlock(&lli->lli_lock);
1118         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1119
1120         LASSERT(!lli->lli_open_fd_write_count);
1121         LASSERT(!lli->lli_open_fd_read_count);
1122         LASSERT(!lli->lli_open_fd_exec_count);
1123
1124         if (lli->lli_mds_write_och)
1125                 ll_md_real_close(inode, FMODE_WRITE);
1126         if (lli->lli_mds_exec_och)
1127                 ll_md_real_close(inode, FMODE_EXEC);
1128         if (lli->lli_mds_read_och)
1129                 ll_md_real_close(inode, FMODE_READ);
1130
1131         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1132                 OBD_FREE(lli->lli_symlink_name,
1133                          strlen(lli->lli_symlink_name) + 1);
1134                 lli->lli_symlink_name = NULL;
1135         }
1136
1137         ll_xattr_cache_destroy(inode);
1138
1139         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1140                 LASSERT(lli->lli_posix_acl == NULL);
1141                 if (lli->lli_remote_perms) {
1142                         free_rmtperm_hash(lli->lli_remote_perms);
1143                         lli->lli_remote_perms = NULL;
1144                 }
1145         }
1146 #ifdef CONFIG_FS_POSIX_ACL
1147         else if (lli->lli_posix_acl) {
1148                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1149                 LASSERT(lli->lli_remote_perms == NULL);
1150                 posix_acl_release(lli->lli_posix_acl);
1151                 lli->lli_posix_acl = NULL;
1152         }
1153 #endif
1154         lli->lli_inode_magic = LLI_INODE_DEAD;
1155
1156         ll_clear_inode_capas(inode);
1157         if (!S_ISDIR(inode->i_mode))
1158                 LASSERT(list_empty(&lli->lli_agl_list));
1159
1160         /*
1161          * XXX This has to be done before lsm is freed below, because
1162          * cl_object still uses inode lsm.
1163          */
1164         cl_inode_fini(inode);
1165         lli->lli_has_smd = false;
1166 }
1167
1168 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1169                   struct md_open_data **mod)
1170 {
1171         struct lustre_md md;
1172         struct inode *inode = dentry->d_inode;
1173         struct ll_sb_info *sbi = ll_i2sbi(inode);
1174         struct ptlrpc_request *request = NULL;
1175         int rc, ia_valid;
1176
1177         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1178                                      LUSTRE_OPC_ANY, NULL);
1179         if (IS_ERR(op_data))
1180                 return PTR_ERR(op_data);
1181
1182         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1183                         &request, mod);
1184         if (rc) {
1185                 ptlrpc_req_finished(request);
1186                 if (rc == -ENOENT) {
1187                         clear_nlink(inode);
1188                         /* Unlinked special device node? Or just a race?
1189                          * Pretend we done everything. */
1190                         if (!S_ISREG(inode->i_mode) &&
1191                             !S_ISDIR(inode->i_mode)) {
1192                                 ia_valid = op_data->op_attr.ia_valid;
1193                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1194                                 rc = simple_setattr(dentry, &op_data->op_attr);
1195                                 op_data->op_attr.ia_valid = ia_valid;
1196                         }
1197                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1198                         CERROR("md_setattr fails: rc = %d\n", rc);
1199                 }
1200                 return rc;
1201         }
1202
1203         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1204                               sbi->ll_md_exp, &md);
1205         if (rc) {
1206                 ptlrpc_req_finished(request);
1207                 return rc;
1208         }
1209
1210         ia_valid = op_data->op_attr.ia_valid;
1211         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1212          * cache is not cleared yet. */
1213         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1214         rc = simple_setattr(dentry, &op_data->op_attr);
1215         op_data->op_attr.ia_valid = ia_valid;
1216
1217         /* Extract epoch data if obtained. */
1218         op_data->op_handle = md.body->handle;
1219         op_data->op_ioepoch = md.body->ioepoch;
1220
1221         ll_update_inode(inode, &md);
1222         ptlrpc_req_finished(request);
1223
1224         return rc;
1225 }
1226
1227 /* Close IO epoch and send Size-on-MDS attribute update. */
1228 static int ll_setattr_done_writing(struct inode *inode,
1229                                    struct md_op_data *op_data,
1230                                    struct md_open_data *mod)
1231 {
1232         struct ll_inode_info *lli = ll_i2info(inode);
1233         int rc = 0;
1234
1235         LASSERT(op_data != NULL);
1236         if (!S_ISREG(inode->i_mode))
1237                 return 0;
1238
1239         CDEBUG(D_INODE, "Epoch %llu closed on "DFID" for truncate\n",
1240                op_data->op_ioepoch, PFID(&lli->lli_fid));
1241
1242         op_data->op_flags = MF_EPOCH_CLOSE;
1243         ll_done_writing_attr(inode, op_data);
1244         ll_pack_inode2opdata(inode, op_data, NULL);
1245
1246         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1247         if (rc == -EAGAIN) {
1248                 /* MDS has instructed us to obtain Size-on-MDS attribute
1249                  * from OSTs and send setattr to back to MDS. */
1250                 rc = ll_som_update(inode, op_data);
1251         } else if (rc) {
1252                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1253                        inode->i_ino, rc);
1254         }
1255         return rc;
1256 }
1257
1258 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1259 {
1260         struct obd_capa *capa;
1261         int rc;
1262
1263         if (attr->ia_valid & ATTR_SIZE)
1264                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1265         else
1266                 capa = ll_mdscapa_get(inode);
1267
1268         rc = cl_setattr_ost(inode, attr, capa);
1269
1270         if (attr->ia_valid & ATTR_SIZE)
1271                 ll_truncate_free_capa(capa);
1272         else
1273                 capa_put(capa);
1274
1275         return rc;
1276 }
1277
1278
1279 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1280  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1281  * keep these values until such a time that objects are allocated for it.
1282  * We do the MDS operations first, as it is checking permissions for us.
1283  * We don't to the MDS RPC if there is nothing that we want to store there,
1284  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1285  * going to do an RPC anyways.
1286  *
1287  * If we are doing a truncate, we will send the mtime and ctime updates
1288  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1289  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1290  * at the same time.
1291  *
1292  * In case of HSMimport, we only set attr on MDS.
1293  */
1294 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1295 {
1296         struct inode *inode = dentry->d_inode;
1297         struct ll_inode_info *lli = ll_i2info(inode);
1298         struct md_op_data *op_data = NULL;
1299         struct md_open_data *mod = NULL;
1300         bool file_is_released = false;
1301         int rc = 0, rc1 = 0;
1302
1303         CDEBUG(D_VFSTRACE,
1304                 "%s: setattr inode %p/fid:"DFID
1305                 " from %llu to %llu, valid %x, hsm_import %d\n",
1306                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1307                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1308                 attr->ia_valid, hsm_import);
1309
1310         if (attr->ia_valid & ATTR_SIZE) {
1311                 /* Check new size against VFS/VM file size limit and rlimit */
1312                 rc = inode_newsize_ok(inode, attr->ia_size);
1313                 if (rc)
1314                         return rc;
1315
1316                 /* The maximum Lustre file size is variable, based on the
1317                  * OST maximum object size and number of stripes.  This
1318                  * needs another check in addition to the VFS check above. */
1319                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1320                         CDEBUG(D_INODE, "file "DFID" too large %llu > %llu\n",
1321                                PFID(&lli->lli_fid), attr->ia_size,
1322                                ll_file_maxbytes(inode));
1323                         return -EFBIG;
1324                 }
1325
1326                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1327         }
1328
1329         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1330         if (attr->ia_valid & TIMES_SET_FLAGS) {
1331                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1332                     !capable(CFS_CAP_FOWNER))
1333                         return -EPERM;
1334         }
1335
1336         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1337         if (attr->ia_valid & ATTR_CTIME) {
1338                 attr->ia_ctime = CURRENT_TIME;
1339                 attr->ia_valid |= ATTR_CTIME_SET;
1340         }
1341         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1342             (attr->ia_valid & ATTR_ATIME)) {
1343                 attr->ia_atime = CURRENT_TIME;
1344                 attr->ia_valid |= ATTR_ATIME_SET;
1345         }
1346         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1347             (attr->ia_valid & ATTR_MTIME)) {
1348                 attr->ia_mtime = CURRENT_TIME;
1349                 attr->ia_valid |= ATTR_MTIME_SET;
1350         }
1351
1352         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1353                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1354                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1355                        get_seconds());
1356
1357         /* If we are changing file size, file content is modified, flag it. */
1358         if (attr->ia_valid & ATTR_SIZE) {
1359                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1360                 spin_lock(&lli->lli_lock);
1361                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1362                 spin_unlock(&lli->lli_lock);
1363         }
1364
1365         /* We always do an MDS RPC, even if we're only changing the size;
1366          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1367
1368         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1369         if (!op_data)
1370                 return -ENOMEM;
1371
1372         if (!S_ISDIR(inode->i_mode)) {
1373                 if (attr->ia_valid & ATTR_SIZE)
1374                         inode_dio_write_done(inode);
1375                 mutex_unlock(&inode->i_mutex);
1376         }
1377
1378         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1379
1380         /* Open epoch for truncate. */
1381         if (exp_connect_som(ll_i2mdexp(inode)) &&
1382             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1383                 op_data->op_flags = MF_EPOCH_OPEN;
1384
1385         /* truncate on a released file must failed with -ENODATA,
1386          * so size must not be set on MDS for released file
1387          * but other attributes must be set
1388          */
1389         if (S_ISREG(inode->i_mode)) {
1390                 struct lov_stripe_md *lsm;
1391                 __u32 gen;
1392
1393                 ll_layout_refresh(inode, &gen);
1394                 lsm = ccc_inode_lsm_get(inode);
1395                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1396                         file_is_released = true;
1397                 ccc_inode_lsm_put(inode, lsm);
1398         }
1399
1400         /* if not in HSM import mode, clear size attr for released file
1401          * we clear the attribute send to MDT in op_data, not the original
1402          * received from caller in attr which is used later to
1403          * decide return code */
1404         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1405                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1406
1407         rc = ll_md_setattr(dentry, op_data, &mod);
1408         if (rc)
1409                 goto out;
1410
1411         /* truncate failed (only when non HSM import), others succeed */
1412         if (file_is_released) {
1413                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1414                         rc = -ENODATA;
1415                 else
1416                         rc = 0;
1417                 goto out;
1418         }
1419
1420         /* RPC to MDT is sent, cancel data modification flag */
1421         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1422                 spin_lock(&lli->lli_lock);
1423                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1424                 spin_unlock(&lli->lli_lock);
1425         }
1426
1427         ll_ioepoch_open(lli, op_data->op_ioepoch);
1428         if (!S_ISREG(inode->i_mode)) {
1429                 rc = 0;
1430                 goto out;
1431         }
1432
1433         if (attr->ia_valid & (ATTR_SIZE |
1434                               ATTR_ATIME | ATTR_ATIME_SET |
1435                               ATTR_MTIME | ATTR_MTIME_SET))
1436                 /* For truncate and utimes sending attributes to OSTs, setting
1437                  * mtime/atime to the past will be performed under PW [0:EOF]
1438                  * extent lock (new_size:EOF for truncate).  It may seem
1439                  * excessive to send mtime/atime updates to OSTs when not
1440                  * setting times to past, but it is necessary due to possible
1441                  * time de-synchronization between MDT inode and OST objects */
1442                 if (attr->ia_valid & ATTR_SIZE)
1443                         down_write(&lli->lli_trunc_sem);
1444                 rc = ll_setattr_ost(inode, attr);
1445                 if (attr->ia_valid & ATTR_SIZE)
1446                         up_write(&lli->lli_trunc_sem);
1447 out:
1448         if (op_data) {
1449                 if (op_data->op_ioepoch) {
1450                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1451                         if (!rc)
1452                                 rc = rc1;
1453                 }
1454                 ll_finish_md_op_data(op_data);
1455         }
1456         if (!S_ISDIR(inode->i_mode)) {
1457                 mutex_lock(&inode->i_mutex);
1458                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1459                         inode_dio_wait(inode);
1460         }
1461
1462         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1463                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1464
1465         return rc;
1466 }
1467
1468 int ll_setattr(struct dentry *de, struct iattr *attr)
1469 {
1470         int mode = de->d_inode->i_mode;
1471
1472         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1473                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1474                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1475
1476         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1477                                (ATTR_SIZE|ATTR_MODE)) &&
1478             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1479              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1480               !(attr->ia_mode & S_ISGID))))
1481                 attr->ia_valid |= ATTR_FORCE;
1482
1483         if ((attr->ia_valid & ATTR_MODE) &&
1484             (mode & S_ISUID) &&
1485             !(attr->ia_mode & S_ISUID) &&
1486             !(attr->ia_valid & ATTR_KILL_SUID))
1487                 attr->ia_valid |= ATTR_KILL_SUID;
1488
1489         if ((attr->ia_valid & ATTR_MODE) &&
1490             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1491             !(attr->ia_mode & S_ISGID) &&
1492             !(attr->ia_valid & ATTR_KILL_SGID))
1493                 attr->ia_valid |= ATTR_KILL_SGID;
1494
1495         return ll_setattr_raw(de, attr, false);
1496 }
1497
1498 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1499                        __u64 max_age, __u32 flags)
1500 {
1501         struct ll_sb_info *sbi = ll_s2sbi(sb);
1502         struct obd_statfs obd_osfs;
1503         int rc;
1504
1505         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1506         if (rc) {
1507                 CERROR("md_statfs fails: rc = %d\n", rc);
1508                 return rc;
1509         }
1510
1511         osfs->os_type = sb->s_magic;
1512
1513         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1514                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,
1515                osfs->os_files);
1516
1517         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1518                 flags |= OBD_STATFS_NODELAY;
1519
1520         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1521         if (rc) {
1522                 CERROR("obd_statfs fails: rc = %d\n", rc);
1523                 return rc;
1524         }
1525
1526         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1527                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1528                obd_osfs.os_files);
1529
1530         osfs->os_bsize = obd_osfs.os_bsize;
1531         osfs->os_blocks = obd_osfs.os_blocks;
1532         osfs->os_bfree = obd_osfs.os_bfree;
1533         osfs->os_bavail = obd_osfs.os_bavail;
1534
1535         /* If we don't have as many objects free on the OST as inodes
1536          * on the MDS, we reduce the total number of inodes to
1537          * compensate, so that the "inodes in use" number is correct.
1538          */
1539         if (obd_osfs.os_ffree < osfs->os_ffree) {
1540                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1541                         obd_osfs.os_ffree;
1542                 osfs->os_ffree = obd_osfs.os_ffree;
1543         }
1544
1545         return rc;
1546 }
1547 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1548 {
1549         struct super_block *sb = de->d_sb;
1550         struct obd_statfs osfs;
1551         int rc;
1552
1553         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1554         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1555
1556         /* Some amount of caching on the client is allowed */
1557         rc = ll_statfs_internal(sb, &osfs,
1558                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1559                                 0);
1560         if (rc)
1561                 return rc;
1562
1563         statfs_unpack(sfs, &osfs);
1564
1565         /* We need to downshift for all 32-bit kernels, because we can't
1566          * tell if the kernel is being called via sys_statfs64() or not.
1567          * Stop before overflowing f_bsize - in which case it is better
1568          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1569         if (sizeof(long) < 8) {
1570                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1571                         sfs->f_bsize <<= 1;
1572
1573                         osfs.os_blocks >>= 1;
1574                         osfs.os_bfree >>= 1;
1575                         osfs.os_bavail >>= 1;
1576                 }
1577         }
1578
1579         sfs->f_blocks = osfs.os_blocks;
1580         sfs->f_bfree = osfs.os_bfree;
1581         sfs->f_bavail = osfs.os_bavail;
1582         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1583         return 0;
1584 }
1585
1586 void ll_inode_size_lock(struct inode *inode)
1587 {
1588         struct ll_inode_info *lli;
1589
1590         LASSERT(!S_ISDIR(inode->i_mode));
1591
1592         lli = ll_i2info(inode);
1593         mutex_lock(&lli->lli_size_mutex);
1594 }
1595
1596 void ll_inode_size_unlock(struct inode *inode)
1597 {
1598         struct ll_inode_info *lli;
1599
1600         lli = ll_i2info(inode);
1601         mutex_unlock(&lli->lli_size_mutex);
1602 }
1603
1604 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1605 {
1606         struct ll_inode_info *lli = ll_i2info(inode);
1607         struct mdt_body *body = md->body;
1608         struct lov_stripe_md *lsm = md->lsm;
1609         struct ll_sb_info *sbi = ll_i2sbi(inode);
1610
1611         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1612         if (lsm != NULL) {
1613                 if (!lli->lli_has_smd &&
1614                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1615                         cl_file_inode_init(inode, md);
1616
1617                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1618                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1619                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1620         }
1621
1622         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1623                 if (body->valid & OBD_MD_FLRMTPERM)
1624                         ll_update_remote_perm(inode, md->remote_perm);
1625         }
1626 #ifdef CONFIG_FS_POSIX_ACL
1627         else if (body->valid & OBD_MD_FLACL) {
1628                 spin_lock(&lli->lli_lock);
1629                 if (lli->lli_posix_acl)
1630                         posix_acl_release(lli->lli_posix_acl);
1631                 lli->lli_posix_acl = md->posix_acl;
1632                 spin_unlock(&lli->lli_lock);
1633         }
1634 #endif
1635         inode->i_ino = cl_fid_build_ino(&body->fid1,
1636                                         sbi->ll_flags & LL_SBI_32BIT_API);
1637         inode->i_generation = cl_fid_build_gen(&body->fid1);
1638
1639         if (body->valid & OBD_MD_FLATIME) {
1640                 if (body->atime > LTIME_S(inode->i_atime))
1641                         LTIME_S(inode->i_atime) = body->atime;
1642                 lli->lli_lvb.lvb_atime = body->atime;
1643         }
1644         if (body->valid & OBD_MD_FLMTIME) {
1645                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1646                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
1647                                inode->i_ino, LTIME_S(inode->i_mtime),
1648                                body->mtime);
1649                         LTIME_S(inode->i_mtime) = body->mtime;
1650                 }
1651                 lli->lli_lvb.lvb_mtime = body->mtime;
1652         }
1653         if (body->valid & OBD_MD_FLCTIME) {
1654                 if (body->ctime > LTIME_S(inode->i_ctime))
1655                         LTIME_S(inode->i_ctime) = body->ctime;
1656                 lli->lli_lvb.lvb_ctime = body->ctime;
1657         }
1658         if (body->valid & OBD_MD_FLMODE)
1659                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1660         if (body->valid & OBD_MD_FLTYPE)
1661                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1662         LASSERT(inode->i_mode != 0);
1663         if (S_ISREG(inode->i_mode))
1664                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1665                                        LL_MAX_BLKSIZE_BITS);
1666         else
1667                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1668         if (body->valid & OBD_MD_FLUID)
1669                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1670         if (body->valid & OBD_MD_FLGID)
1671                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1672         if (body->valid & OBD_MD_FLFLAGS)
1673                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1674         if (body->valid & OBD_MD_FLNLINK)
1675                 set_nlink(inode, body->nlink);
1676         if (body->valid & OBD_MD_FLRDEV)
1677                 inode->i_rdev = old_decode_dev(body->rdev);
1678
1679         if (body->valid & OBD_MD_FLID) {
1680                 /* FID shouldn't be changed! */
1681                 if (fid_is_sane(&lli->lli_fid)) {
1682                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1683                                  "Trying to change FID "DFID
1684                                  " to the "DFID", inode %lu/%u(%p)\n",
1685                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1686                                  inode->i_ino, inode->i_generation, inode);
1687                 } else
1688                         lli->lli_fid = body->fid1;
1689         }
1690
1691         LASSERT(fid_seq(&lli->lli_fid) != 0);
1692
1693         if (body->valid & OBD_MD_FLSIZE) {
1694                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1695                     S_ISREG(inode->i_mode)) {
1696                         struct lustre_handle lockh;
1697                         ldlm_mode_t mode;
1698
1699                         /* As it is possible a blocking ast has been processed
1700                          * by this time, we need to check there is an UPDATE
1701                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1702                          * it. */
1703                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1704                                                &lockh, LDLM_FL_CBPENDING,
1705                                                LCK_CR | LCK_CW |
1706                                                LCK_PR | LCK_PW);
1707                         if (mode) {
1708                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1709                                                       LLIF_EPOCH_PENDING |
1710                                                       LLIF_SOM_DIRTY)) {
1711                                         CERROR("ino %lu flags %u still has size authority! do not trust the size got from MDS\n",
1712                                                inode->i_ino, lli->lli_flags);
1713                                 } else {
1714                                         /* Use old size assignment to avoid
1715                                          * deadlock bz14138 & bz14326 */
1716                                         i_size_write(inode, body->size);
1717                                         spin_lock(&lli->lli_lock);
1718                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1719                                         spin_unlock(&lli->lli_lock);
1720                                 }
1721                                 ldlm_lock_decref(&lockh, mode);
1722                         }
1723                 } else {
1724                         /* Use old size assignment to avoid
1725                          * deadlock bz14138 & bz14326 */
1726                         i_size_write(inode, body->size);
1727
1728                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1729                                inode->i_ino, (unsigned long long)body->size);
1730                 }
1731
1732                 if (body->valid & OBD_MD_FLBLOCKS)
1733                         inode->i_blocks = body->blocks;
1734         }
1735
1736         if (body->valid & OBD_MD_FLMDSCAPA) {
1737                 LASSERT(md->mds_capa);
1738                 ll_add_capa(inode, md->mds_capa);
1739         }
1740         if (body->valid & OBD_MD_FLOSSCAPA) {
1741                 LASSERT(md->oss_capa);
1742                 ll_add_capa(inode, md->oss_capa);
1743         }
1744
1745         if (body->valid & OBD_MD_TSTATE) {
1746                 if (body->t_state & MS_RESTORE)
1747                         lli->lli_flags |= LLIF_FILE_RESTORING;
1748         }
1749 }
1750
1751 void ll_read_inode2(struct inode *inode, void *opaque)
1752 {
1753         struct lustre_md *md = opaque;
1754         struct ll_inode_info *lli = ll_i2info(inode);
1755
1756         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1757                PFID(&lli->lli_fid), inode);
1758
1759         LASSERT(!lli->lli_has_smd);
1760
1761         /* Core attributes from the MDS first.  This is a new inode, and
1762          * the VFS doesn't zero times in the core inode so we have to do
1763          * it ourselves.  They will be overwritten by either MDS or OST
1764          * attributes - we just need to make sure they aren't newer. */
1765         LTIME_S(inode->i_mtime) = 0;
1766         LTIME_S(inode->i_atime) = 0;
1767         LTIME_S(inode->i_ctime) = 0;
1768         inode->i_rdev = 0;
1769         ll_update_inode(inode, md);
1770
1771         /* OIDEBUG(inode); */
1772
1773         if (S_ISREG(inode->i_mode)) {
1774                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1775
1776                 inode->i_op = &ll_file_inode_operations;
1777                 inode->i_fop = sbi->ll_fop;
1778                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1779         } else if (S_ISDIR(inode->i_mode)) {
1780                 inode->i_op = &ll_dir_inode_operations;
1781                 inode->i_fop = &ll_dir_operations;
1782         } else if (S_ISLNK(inode->i_mode)) {
1783                 inode->i_op = &ll_fast_symlink_inode_operations;
1784         } else {
1785                 inode->i_op = &ll_special_inode_operations;
1786
1787                 init_special_inode(inode, inode->i_mode,
1788                                    inode->i_rdev);
1789         }
1790 }
1791
1792 void ll_delete_inode(struct inode *inode)
1793 {
1794         struct cl_inode_info *lli = cl_i2info(inode);
1795
1796         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1797                 /* discard all dirty pages before truncating them, required by
1798                  * osc_extent implementation at LU-1030. */
1799                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1800                                    CL_FSYNC_DISCARD, 1);
1801
1802         truncate_inode_pages_final(&inode->i_data);
1803
1804         /* Workaround for LU-118 */
1805         if (inode->i_data.nrpages) {
1806                 spin_lock_irq(&inode->i_data.tree_lock);
1807                 spin_unlock_irq(&inode->i_data.tree_lock);
1808                 LASSERTF(inode->i_data.nrpages == 0,
1809                          "inode=%lu/%u(%p) nrpages=%lu, see http://jira.whamcloud.com/browse/LU-118\n",
1810                          inode->i_ino, inode->i_generation, inode,
1811                          inode->i_data.nrpages);
1812         }
1813         /* Workaround end */
1814
1815         ll_clear_inode(inode);
1816         clear_inode(inode);
1817 }
1818
1819 int ll_iocontrol(struct inode *inode, struct file *file,
1820                  unsigned int cmd, unsigned long arg)
1821 {
1822         struct ll_sb_info *sbi = ll_i2sbi(inode);
1823         struct ptlrpc_request *req = NULL;
1824         int rc, flags = 0;
1825
1826         switch (cmd) {
1827         case FSFILT_IOC_GETFLAGS: {
1828                 struct mdt_body *body;
1829                 struct md_op_data *op_data;
1830
1831                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1832                                              0, 0, LUSTRE_OPC_ANY,
1833                                              NULL);
1834                 if (IS_ERR(op_data))
1835                         return PTR_ERR(op_data);
1836
1837                 op_data->op_valid = OBD_MD_FLFLAGS;
1838                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1839                 ll_finish_md_op_data(op_data);
1840                 if (rc) {
1841                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1842                         return -abs(rc);
1843                 }
1844
1845                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1846
1847                 flags = body->flags;
1848
1849                 ptlrpc_req_finished(req);
1850
1851                 return put_user(flags, (int *)arg);
1852         }
1853         case FSFILT_IOC_SETFLAGS: {
1854                 struct lov_stripe_md *lsm;
1855                 struct obd_info oinfo = { { { 0 } } };
1856                 struct md_op_data *op_data;
1857
1858                 if (get_user(flags, (int *)arg))
1859                         return -EFAULT;
1860
1861                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1862                                              LUSTRE_OPC_ANY, NULL);
1863                 if (IS_ERR(op_data))
1864                         return PTR_ERR(op_data);
1865
1866                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1867                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1868                 rc = md_setattr(sbi->ll_md_exp, op_data,
1869                                 NULL, 0, NULL, 0, &req, NULL);
1870                 ll_finish_md_op_data(op_data);
1871                 ptlrpc_req_finished(req);
1872                 if (rc)
1873                         return rc;
1874
1875                 inode->i_flags = ll_ext_to_inode_flags(flags);
1876
1877                 lsm = ccc_inode_lsm_get(inode);
1878                 if (!lsm_has_objects(lsm)) {
1879                         ccc_inode_lsm_put(inode, lsm);
1880                         return 0;
1881                 }
1882
1883                 OBDO_ALLOC(oinfo.oi_oa);
1884                 if (!oinfo.oi_oa) {
1885                         ccc_inode_lsm_put(inode, lsm);
1886                         return -ENOMEM;
1887                 }
1888                 oinfo.oi_md = lsm;
1889                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1890                 oinfo.oi_oa->o_flags = flags;
1891                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1892                                        OBD_MD_FLGROUP;
1893                 oinfo.oi_capa = ll_mdscapa_get(inode);
1894                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1895                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1896                 capa_put(oinfo.oi_capa);
1897                 OBDO_FREE(oinfo.oi_oa);
1898                 ccc_inode_lsm_put(inode, lsm);
1899
1900                 if (rc && rc != -EPERM && rc != -EACCES)
1901                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1902
1903                 return rc;
1904         }
1905         default:
1906                 return -ENOSYS;
1907         }
1908
1909         return 0;
1910 }
1911
1912 int ll_flush_ctx(struct inode *inode)
1913 {
1914         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1915
1916         CDEBUG(D_SEC, "flush context for user %d\n",
1917                       from_kuid(&init_user_ns, current_uid()));
1918
1919         obd_set_info_async(NULL, sbi->ll_md_exp,
1920                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1921                            0, NULL, NULL);
1922         obd_set_info_async(NULL, sbi->ll_dt_exp,
1923                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1924                            0, NULL, NULL);
1925         return 0;
1926 }
1927
1928 /* umount -f client means force down, don't save state */
1929 void ll_umount_begin(struct super_block *sb)
1930 {
1931         struct ll_sb_info *sbi = ll_s2sbi(sb);
1932         struct obd_device *obd;
1933         struct obd_ioctl_data *ioc_data;
1934
1935         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1936                sb->s_count, atomic_read(&sb->s_active));
1937
1938         obd = class_exp2obd(sbi->ll_md_exp);
1939         if (obd == NULL) {
1940                 CERROR("Invalid MDC connection handle %#llx\n",
1941                        sbi->ll_md_exp->exp_handle.h_cookie);
1942                 return;
1943         }
1944         obd->obd_force = 1;
1945
1946         obd = class_exp2obd(sbi->ll_dt_exp);
1947         if (obd == NULL) {
1948                 CERROR("Invalid LOV connection handle %#llx\n",
1949                        sbi->ll_dt_exp->exp_handle.h_cookie);
1950                 return;
1951         }
1952         obd->obd_force = 1;
1953
1954         ioc_data = kzalloc(sizeof(*ioc_data), GFP_NOFS);
1955         if (ioc_data) {
1956                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
1957                               sizeof(*ioc_data), ioc_data, NULL);
1958
1959                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
1960                               sizeof(*ioc_data), ioc_data, NULL);
1961
1962                 OBD_FREE_PTR(ioc_data);
1963         }
1964
1965         /* Really, we'd like to wait until there are no requests outstanding,
1966          * and then continue.  For now, we just invalidate the requests,
1967          * schedule() and sleep one second if needed, and hope.
1968          */
1969         schedule();
1970 }
1971
1972 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
1973 {
1974         struct ll_sb_info *sbi = ll_s2sbi(sb);
1975         char *profilenm = get_profile_name(sb);
1976         int err;
1977         __u32 read_only;
1978
1979         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
1980                 read_only = *flags & MS_RDONLY;
1981                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
1982                                          sizeof(KEY_READ_ONLY),
1983                                          KEY_READ_ONLY, sizeof(read_only),
1984                                          &read_only, NULL);
1985                 if (err) {
1986                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
1987                                       profilenm, read_only ?
1988                                       "read-only" : "read-write", err);
1989                         return err;
1990                 }
1991
1992                 if (read_only)
1993                         sb->s_flags |= MS_RDONLY;
1994                 else
1995                         sb->s_flags &= ~MS_RDONLY;
1996
1997                 if (sbi->ll_flags & LL_SBI_VERBOSE)
1998                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
1999                                       read_only ?  "read-only" : "read-write");
2000         }
2001         return 0;
2002 }
2003
2004 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2005                   struct super_block *sb, struct lookup_intent *it)
2006 {
2007         struct ll_sb_info *sbi = NULL;
2008         struct lustre_md md;
2009         int rc;
2010
2011         LASSERT(*inode || sb);
2012         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2013         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2014                               sbi->ll_md_exp, &md);
2015         if (rc)
2016                 return rc;
2017
2018         if (*inode) {
2019                 ll_update_inode(*inode, &md);
2020         } else {
2021                 LASSERT(sb != NULL);
2022
2023                 /*
2024                  * At this point server returns to client's same fid as client
2025                  * generated for creating. So using ->fid1 is okay here.
2026                  */
2027                 LASSERT(fid_is_sane(&md.body->fid1));
2028
2029                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2030                                              sbi->ll_flags & LL_SBI_32BIT_API),
2031                                  &md);
2032                 if (*inode == NULL || IS_ERR(*inode)) {
2033 #ifdef CONFIG_FS_POSIX_ACL
2034                         if (md.posix_acl) {
2035                                 posix_acl_release(md.posix_acl);
2036                                 md.posix_acl = NULL;
2037                         }
2038 #endif
2039                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2040                         *inode = NULL;
2041                         CERROR("new_inode -fatal: rc %d\n", rc);
2042                         goto out;
2043                 }
2044         }
2045
2046         /* Handling piggyback layout lock.
2047          * Layout lock can be piggybacked by getattr and open request.
2048          * The lsm can be applied to inode only if it comes with a layout lock
2049          * otherwise correct layout may be overwritten, for example:
2050          * 1. proc1: mdt returns a lsm but not granting layout
2051          * 2. layout was changed by another client
2052          * 3. proc2: refresh layout and layout lock granted
2053          * 4. proc1: to apply a stale layout */
2054         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2055                 struct lustre_handle lockh;
2056                 struct ldlm_lock *lock;
2057
2058                 lockh.cookie = it->d.lustre.it_lock_handle;
2059                 lock = ldlm_handle2lock(&lockh);
2060                 LASSERT(lock != NULL);
2061                 if (ldlm_has_layout(lock)) {
2062                         struct cl_object_conf conf;
2063
2064                         memset(&conf, 0, sizeof(conf));
2065                         conf.coc_opc = OBJECT_CONF_SET;
2066                         conf.coc_inode = *inode;
2067                         conf.coc_lock = lock;
2068                         conf.u.coc_md = &md;
2069                         (void)ll_layout_conf(*inode, &conf);
2070                 }
2071                 LDLM_LOCK_PUT(lock);
2072         }
2073
2074 out:
2075         if (md.lsm != NULL)
2076                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2077         md_free_lustre_md(sbi->ll_md_exp, &md);
2078         return rc;
2079 }
2080
2081 int ll_obd_statfs(struct inode *inode, void *arg)
2082 {
2083         struct ll_sb_info *sbi = NULL;
2084         struct obd_export *exp;
2085         char *buf = NULL;
2086         struct obd_ioctl_data *data = NULL;
2087         __u32 type;
2088         __u32 flags;
2089         int len = 0, rc;
2090
2091         if (!inode) {
2092                 rc = -EINVAL;
2093                 goto out_statfs;
2094         }
2095
2096         sbi = ll_i2sbi(inode);
2097         if (!sbi) {
2098                 rc = -EINVAL;
2099                 goto out_statfs;
2100         }
2101
2102         rc = obd_ioctl_getdata(&buf, &len, arg);
2103         if (rc)
2104                 goto out_statfs;
2105
2106         data = (void *)buf;
2107         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2108             !data->ioc_pbuf1 || !data->ioc_pbuf2) {
2109                 rc = -EINVAL;
2110                 goto out_statfs;
2111         }
2112
2113         if (data->ioc_inllen1 != sizeof(__u32) ||
2114             data->ioc_inllen2 != sizeof(__u32) ||
2115             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2116             data->ioc_plen2 != sizeof(struct obd_uuid)) {
2117                 rc = -EINVAL;
2118                 goto out_statfs;
2119         }
2120
2121         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2122         if (type & LL_STATFS_LMV)
2123                 exp = sbi->ll_md_exp;
2124         else if (type & LL_STATFS_LOV)
2125                 exp = sbi->ll_dt_exp;
2126         else {
2127                 rc = -ENODEV;
2128                 goto out_statfs;
2129         }
2130
2131         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2132         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2133         if (rc)
2134                 goto out_statfs;
2135 out_statfs:
2136         if (buf)
2137                 obd_ioctl_freedata(buf, len);
2138         return rc;
2139 }
2140
2141 int ll_process_config(struct lustre_cfg *lcfg)
2142 {
2143         char *ptr;
2144         void *sb;
2145         struct lprocfs_static_vars lvars;
2146         unsigned long x;
2147         int rc = 0;
2148
2149         lprocfs_llite_init_vars(&lvars);
2150
2151         /* The instance name contains the sb: lustre-client-aacfe000 */
2152         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2153         if (!ptr || !*(++ptr))
2154                 return -EINVAL;
2155         if (sscanf(ptr, "%lx", &x) != 1)
2156                 return -EINVAL;
2157         sb = (void *)x;
2158         /* This better be a real Lustre superblock! */
2159         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2160
2161         /* Note we have not called client_common_fill_super yet, so
2162            proc fns must be able to handle that! */
2163         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2164                                       lcfg, sb);
2165         if (rc > 0)
2166                 rc = 0;
2167         return rc;
2168 }
2169
2170 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2171 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2172                                        struct inode *i1, struct inode *i2,
2173                                        const char *name, int namelen,
2174                                        int mode, __u32 opc, void *data)
2175 {
2176         LASSERT(i1 != NULL);
2177
2178         if (namelen > ll_i2sbi(i1)->ll_namelen)
2179                 return ERR_PTR(-ENAMETOOLONG);
2180
2181         if (op_data == NULL)
2182                 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
2183
2184         if (op_data == NULL)
2185                 return ERR_PTR(-ENOMEM);
2186
2187         ll_i2gids(op_data->op_suppgids, i1, i2);
2188         op_data->op_fid1 = *ll_inode2fid(i1);
2189         op_data->op_capa1 = ll_mdscapa_get(i1);
2190
2191         if (i2) {
2192                 op_data->op_fid2 = *ll_inode2fid(i2);
2193                 op_data->op_capa2 = ll_mdscapa_get(i2);
2194         } else {
2195                 fid_zero(&op_data->op_fid2);
2196                 op_data->op_capa2 = NULL;
2197         }
2198
2199         op_data->op_name = name;
2200         op_data->op_namelen = namelen;
2201         op_data->op_mode = mode;
2202         op_data->op_mod_time = get_seconds();
2203         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2204         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2205         op_data->op_cap = cfs_curproc_cap_pack();
2206         op_data->op_bias = 0;
2207         op_data->op_cli_flags = 0;
2208         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2209              filename_is_volatile(name, namelen, NULL))
2210                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2211         op_data->op_opc = opc;
2212         op_data->op_mds = 0;
2213         op_data->op_data = data;
2214
2215         /* If the file is being opened after mknod() (normally due to NFS)
2216          * try to use the default stripe data from parent directory for
2217          * allocating OST objects.  Try to pass the parent FID to MDS. */
2218         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2219             !ll_i2info(i2)->lli_has_smd) {
2220                 struct ll_inode_info *lli = ll_i2info(i2);
2221
2222                 spin_lock(&lli->lli_lock);
2223                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2224                         op_data->op_fid1 = lli->lli_pfid;
2225                 spin_unlock(&lli->lli_lock);
2226                 /** We ignore parent's capability temporary. */
2227         }
2228
2229         /* When called by ll_setattr_raw, file is i1. */
2230         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2231                 op_data->op_bias |= MDS_DATA_MODIFIED;
2232
2233         return op_data;
2234 }
2235
2236 void ll_finish_md_op_data(struct md_op_data *op_data)
2237 {
2238         capa_put(op_data->op_capa1);
2239         capa_put(op_data->op_capa2);
2240         OBD_FREE_PTR(op_data);
2241 }
2242
2243 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2244 {
2245         struct ll_sb_info *sbi;
2246
2247         LASSERT((seq != NULL) && (dentry != NULL));
2248         sbi = ll_s2sbi(dentry->d_sb);
2249
2250         if (sbi->ll_flags & LL_SBI_NOLCK)
2251                 seq_puts(seq, ",nolock");
2252
2253         if (sbi->ll_flags & LL_SBI_FLOCK)
2254                 seq_puts(seq, ",flock");
2255
2256         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2257                 seq_puts(seq, ",localflock");
2258
2259         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2260                 seq_puts(seq, ",user_xattr");
2261
2262         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2263                 seq_puts(seq, ",lazystatfs");
2264
2265         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2266                 seq_puts(seq, ",user_fid2path");
2267
2268         return 0;
2269 }
2270
2271 /**
2272  * Get obd name by cmd, and copy out to user space
2273  */
2274 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2275 {
2276         struct ll_sb_info *sbi = ll_i2sbi(inode);
2277         struct obd_device *obd;
2278
2279         if (cmd == OBD_IOC_GETDTNAME)
2280                 obd = class_exp2obd(sbi->ll_dt_exp);
2281         else if (cmd == OBD_IOC_GETMDNAME)
2282                 obd = class_exp2obd(sbi->ll_md_exp);
2283         else
2284                 return -EINVAL;
2285
2286         if (!obd)
2287                 return -ENOENT;
2288
2289         if (copy_to_user((void *)arg, obd->obd_name,
2290                              strlen(obd->obd_name) + 1))
2291                 return -EFAULT;
2292
2293         return 0;
2294 }
2295
2296 /**
2297  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2298  * fsname will be returned in this buffer; otherwise, a static buffer will be
2299  * used to store the fsname and returned to caller.
2300  */
2301 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2302 {
2303         static char fsname_static[MTI_NAME_MAXLEN];
2304         struct lustre_sb_info *lsi = s2lsi(sb);
2305         char *ptr;
2306         int len;
2307
2308         if (buf == NULL) {
2309                 /* this means the caller wants to use static buffer
2310                  * and it doesn't care about race. Usually this is
2311                  * in error reporting path */
2312                 buf = fsname_static;
2313                 buflen = sizeof(fsname_static);
2314         }
2315
2316         len = strlen(lsi->lsi_lmd->lmd_profile);
2317         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2318         if (ptr && (strcmp(ptr, "-client") == 0))
2319                 len -= 7;
2320
2321         if (unlikely(len >= buflen))
2322                 len = buflen - 1;
2323         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2324         buf[len] = '\0';
2325
2326         return buf;
2327 }
2328
2329 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2330 {
2331         char *buf, *path = NULL;
2332         struct dentry *dentry = NULL;
2333         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2334
2335         /* this can be called inside spin lock so use GFP_ATOMIC. */
2336         buf = (char *)__get_free_page(GFP_ATOMIC);
2337         if (buf != NULL) {
2338                 dentry = d_find_alias(page->mapping->host);
2339                 if (dentry != NULL)
2340                         path = dentry_path_raw(dentry, buf, PAGE_SIZE);
2341         }
2342
2343         CDEBUG(D_WARNING,
2344                "%s: dirty page discard: %s/fid: " DFID "/%s may get corrupted (rc %d)\n",
2345                ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2346                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2347                PFID(&obj->cob_header.coh_lu.loh_fid),
2348                (path && !IS_ERR(path)) ? path : "", ioret);
2349
2350         if (dentry != NULL)
2351                 dput(dentry);
2352
2353         if (buf != NULL)
2354                 free_page((unsigned long)buf);
2355 }