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

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