lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47
  48 #include <lustre_lite.h>
  49 #include <lustre_ha.h>
  50 #include <lustre_dlm.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_disk.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55 #include <cl_object.h>
  56 #include <obd_cksum.h>
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60
  61 CFS_LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82         ENTRY;
  83
  84         OBD_ALLOC(sbi, sizeof(*sbi));
  85         if (!sbi)
  86                 RETURN(NULL);
  87
  88         spin_lock_init(&sbi->ll_lock);
  89         mutex_init(&sbi->ll_lco.lco_lock);
  90         spin_lock_init(&sbi->ll_pp_extent_lock);
  91         spin_lock_init(&sbi->ll_process_lock);
  92         sbi->ll_rw_stats_on = 0;
  93
  94         si_meminfo(&si);
  95         pages = si.totalram - si.totalhigh;
  96         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
  97                 lru_page_max = pages / 2;
  98         } else {
  99                 lru_page_max = (pages / 4) * 3;
 100         }
 101
 102         /* initialize lru data */
 103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 104         sbi->ll_cache.ccc_lru_max = lru_page_max;
 105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 108
 109         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 110                                            SBI_DEFAULT_READAHEAD_MAX);
 111         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 112         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 113                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 114         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 115         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 116
 117         ll_generate_random_uuid(uuid);
 118         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 119         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 120
 121         spin_lock(&ll_sb_lock);
 122         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 123         spin_unlock(&ll_sb_lock);
 124
 125         sbi->ll_flags |= LL_SBI_VERBOSE;
 126 #ifdef ENABLE_CHECKSUM
 127         sbi->ll_flags |= LL_SBI_CHECKSUM;
 128 #endif
 129
 130 #ifdef HAVE_LRU_RESIZE_SUPPORT
 131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 132 #endif
 133
 134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 135                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 136                                pp_r_hist.oh_lock);
 137                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 138                                pp_w_hist.oh_lock);
 139         }
 140
 141         /* metadata statahead is enabled by default */
 142         sbi->ll_sa_max = LL_SA_RPC_DEF;
 143         cfs_atomic_set(&sbi->ll_sa_total, 0);
 144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 145         cfs_atomic_set(&sbi->ll_agl_total, 0);
 146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 147
 148         RETURN(sbi);
 149 }
 150
 151 void ll_free_sbi(struct super_block *sb)
 152 {
 153         struct ll_sb_info *sbi = ll_s2sbi(sb);
 154         ENTRY;
 155
 156         if (sbi != NULL) {
 157                 spin_lock(&ll_sb_lock);
 158                 cfs_list_del(&sbi->ll_list);
 159                 spin_unlock(&ll_sb_lock);
 160                 OBD_FREE(sbi, sizeof(*sbi));
 161         }
 162         EXIT;
 163 }
 164
 165 static struct dentry_operations ll_d_root_ops = {
 166         .d_compare = ll_dcompare,
 167         .d_revalidate = ll_revalidate_nd,
 168 };
 169
 170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 171                                     struct vfsmount *mnt)
 172 {
 173         struct inode *root = 0;
 174         struct ll_sb_info *sbi = ll_s2sbi(sb);
 175         struct obd_device *obd;
 176         struct obd_capa *oc = NULL;
 177         struct obd_statfs *osfs = NULL;
 178         struct ptlrpc_request *request = NULL;
 179         struct obd_connect_data *data = NULL;
 180         struct obd_uuid *uuid;
 181         struct md_op_data *op_data;
 182         struct lustre_md lmd;
 183         obd_valid valid;
 184         int size, err, checksum;
 185         ENTRY;
 186
 187         obd = class_name2obd(md);
 188         if (!obd) {
 189                 CERROR("MD %s: not setup or attached\n", md);
 190                 RETURN(-EINVAL);
 191         }
 192
 193         OBD_ALLOC_PTR(data);
 194         if (data == NULL)
 195                 RETURN(-ENOMEM);
 196
 197         OBD_ALLOC_PTR(osfs);
 198         if (osfs == NULL) {
 199                 OBD_FREE_PTR(data);
 200                 RETURN(-ENOMEM);
 201         }
 202
 203         if (proc_lustre_fs_root) {
 204                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 205                                                   dt, md);
 206                 if (err < 0)
 207                         CERROR("could not register mount in /proc/fs/lustre\n");
 208         }
 209
 210         /* indicate the features supported by this client */
 211         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 212                                   OBD_CONNECT_ATTRFID  |
 213                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 214                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 215                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 216                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 217                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 218                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 219                                   OBD_CONNECT_EINPROGRESS |
 220                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 221                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 222                                   OBD_CONNECT_MAX_EASIZE;
 223
 224         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 225                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 226
 227 #ifdef HAVE_LRU_RESIZE_SUPPORT
 228         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 229                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 230 #endif
 231 #ifdef CONFIG_FS_POSIX_ACL
 232         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 233 #endif
 234
 235         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 236                 /* flag mdc connection as lightweight, only used for test
 237                  * purpose, use with care */
 238                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 239
 240         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 241         data->ocd_version = LUSTRE_VERSION_CODE;
 242
 243         if (sb->s_flags & MS_RDONLY)
 244                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 245         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 246                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 247
 248 #ifdef HAVE_MS_FLOCK_LOCK
 249         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 250         sb->s_flags |= MS_FLOCK_LOCK;
 251 #endif
 252 #ifdef MS_HAS_NEW_AOPS
 253         sb->s_flags |= MS_HAS_NEW_AOPS;
 254 #endif
 255
 256         if (sbi->ll_flags & LL_SBI_FLOCK)
 257                 sbi->ll_fop = &ll_file_operations_flock;
 258         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 259                 sbi->ll_fop = &ll_file_operations;
 260         else
 261                 sbi->ll_fop = &ll_file_operations_noflock;
 262
 263         /* real client */
 264         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 265         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 266                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 267
 268         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 269
 270         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 271         if (err == -EBUSY) {
 272                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 273                                    "recovery, of which this client is not a "
 274                                    "part. Please wait for recovery to complete,"
 275                                    " abort, or time out.\n", md);
 276                 GOTO(out, err);
 277         } else if (err) {
 278                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 279                 GOTO(out, err);
 280         }
 281
 282         sbi->ll_md_exp->exp_connect_data = *data;
 283
 284         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 285                            LUSTRE_SEQ_METADATA);
 286         if (err) {
 287                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 288                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 289                 GOTO(out_md, err);
 290         }
 291
 292         /* For mount, we only need fs info from MDT0, and also in DNE, it
 293          * can make sure the client can be mounted as long as MDT0 is
 294          * avaible */
 295         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 296                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 297                         OBD_STATFS_FOR_MDT0);
 298         if (err)
 299                 GOTO(out_md_fid, err);
 300
 301         /* This needs to be after statfs to ensure connect has finished.
 302          * Note that "data" does NOT contain the valid connect reply.
 303          * If connecting to a 1.8 server there will be no LMV device, so
 304          * we can access the MDC export directly and exp_connect_flags will
 305          * be non-zero, but if accessing an upgraded 2.1 server it will
 306          * have the correct flags filled in.
 307          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 308         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 309         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 310             valid != CLIENT_CONNECT_MDT_REQD) {
 311                 char *buf;
 312
 313                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 314                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 315                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 316                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 317                                    "feature(s) needed for correct operation "
 318                                    "of this client (%s). Please upgrade "
 319                                    "server or downgrade client.\n",
 320                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 321                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 322                 GOTO(out_md_fid, err = -EPROTO);
 323         }
 324
 325         size = sizeof(*data);
 326         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 327                            KEY_CONN_DATA,  &size, data, NULL);
 328         if (err) {
 329                 CERROR("%s: Get connect data failed: rc = %d\n",
 330                        sbi->ll_md_exp->exp_obd->obd_name, err);
 331                 GOTO(out_md_fid, err);
 332         }
 333
 334         LASSERT(osfs->os_bsize);
 335         sb->s_blocksize = osfs->os_bsize;
 336         sb->s_blocksize_bits = log2(osfs->os_bsize);
 337         sb->s_magic = LL_SUPER_MAGIC;
 338         sb->s_maxbytes = MAX_LFS_FILESIZE;
 339         sbi->ll_namelen = osfs->os_namelen;
 340         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 341
 342         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 343             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 344                 LCONSOLE_INFO("Disabling user_xattr feature because "
 345                               "it is not supported on the server\n");
 346                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 347         }
 348
 349         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 350 #ifdef MS_POSIXACL
 351                 sb->s_flags |= MS_POSIXACL;
 352 #endif
 353                 sbi->ll_flags |= LL_SBI_ACL;
 354         } else {
 355                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 356 #ifdef MS_POSIXACL
 357                 sb->s_flags &= ~MS_POSIXACL;
 358 #endif
 359                 sbi->ll_flags &= ~LL_SBI_ACL;
 360         }
 361
 362         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 363                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 364                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 365                         LCONSOLE_INFO("client is set as remote by default.\n");
 366                 }
 367         } else {
 368                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 369                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 370                         LCONSOLE_INFO("client claims to be remote, but server "
 371                                       "rejected, forced to be local.\n");
 372                 }
 373         }
 374
 375         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 376                 LCONSOLE_INFO("client enabled MDS capability!\n");
 377                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 378         }
 379
 380         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 381                 LCONSOLE_INFO("client enabled OSS capability!\n");
 382                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 383         }
 384
 385         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 386                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 387
 388         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 389                 sbi->ll_md_brw_size = data->ocd_brw_size;
 390         else
 391                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 392
 393         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 394                 LCONSOLE_INFO("Layout lock feature supported.\n");
 395                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 396         }
 397
 398         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 399                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 400                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 401                                       "unknown maximum xattr size.\n", dt);
 402                 } else {
 403                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 404                         sbi->ll_xattr_cache_enabled = 1;
 405                 }
 406         }
 407
 408         obd = class_name2obd(dt);
 409         if (!obd) {
 410                 CERROR("DT %s: not setup or attached\n", dt);
 411                 GOTO(out_md_fid, err = -ENODEV);
 412         }
 413
 414         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 415                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 416                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 417                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 418                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 419                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 420                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 421                                   OBD_CONNECT_MAXBYTES |
 422                                   OBD_CONNECT_EINPROGRESS |
 423                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 424                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 425
 426         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 427                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 428
 429         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 430                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 431                  * disabled by default, because it can still be enabled on the
 432                  * fly via /proc. As a consequence, we still need to come to an
 433                  * agreement on the supported algorithms at connect time */
 434                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 435
 436                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 437                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 438                 else
 439                         data->ocd_cksum_types = cksum_types_supported_client();
 440         }
 441
 442 #ifdef HAVE_LRU_RESIZE_SUPPORT
 443         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 444 #endif
 445         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 446                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 447
 448         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 449                "ocd_grant: %d\n", data->ocd_connect_flags,
 450                data->ocd_version, data->ocd_grant);
 451
 452         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 453         obd->obd_upcall.onu_upcall = cl_ocd_update;
 454
 455         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 456
 457         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 458                           NULL);
 459         if (err == -EBUSY) {
 460                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 461                                    "recovery, of which this client is not a "
 462                                    "part.  Please wait for recovery to "
 463                                    "complete, abort, or time out.\n", dt);
 464                 GOTO(out_md, err);
 465         } else if (err) {
 466                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 467                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 468                 GOTO(out_md, err);
 469         }
 470
 471         sbi->ll_dt_exp->exp_connect_data = *data;
 472
 473         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 474                            LUSTRE_SEQ_METADATA);
 475         if (err) {
 476                 CERROR("%s: Can't init data layer FID infrastructure, "
 477                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 478                 GOTO(out_dt, err);
 479         }
 480
 481         mutex_lock(&sbi->ll_lco.lco_lock);
 482         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 483         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 484         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 485         mutex_unlock(&sbi->ll_lco.lco_lock);
 486
 487         fid_zero(&sbi->ll_root_fid);
 488         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 489         if (err) {
 490                 CERROR("cannot mds_connect: rc = %d\n", err);
 491                 GOTO(out_lock_cn_cb, err);
 492         }
 493         if (!fid_is_sane(&sbi->ll_root_fid)) {
 494                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 495                        sbi->ll_md_exp->exp_obd->obd_name,
 496                        PFID(&sbi->ll_root_fid));
 497                 GOTO(out_lock_cn_cb, err = -EINVAL);
 498         }
 499         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 500
 501         sb->s_op = &lustre_super_operations;
 502 #if THREAD_SIZE >= 8192 /*b=17630*/
 503         sb->s_export_op = &lustre_export_operations;
 504 #endif
 505
 506         /* make root inode
 507          * XXX: move this to after cbd setup? */
 508         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 509         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 510                 valid |= OBD_MD_FLRMTPERM;
 511         else if (sbi->ll_flags & LL_SBI_ACL)
 512                 valid |= OBD_MD_FLACL;
 513
 514         OBD_ALLOC_PTR(op_data);
 515         if (op_data == NULL)
 516                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 517
 518         op_data->op_fid1 = sbi->ll_root_fid;
 519         op_data->op_mode = 0;
 520         op_data->op_capa1 = oc;
 521         op_data->op_valid = valid;
 522
 523         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 524         if (oc)
 525                 capa_put(oc);
 526         OBD_FREE_PTR(op_data);
 527         if (err) {
 528                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 529                        sbi->ll_md_exp->exp_obd->obd_name, err);
 530                 GOTO(out_lock_cn_cb, err);
 531         }
 532
 533         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 534                                sbi->ll_md_exp, &lmd);
 535         if (err) {
 536                 CERROR("failed to understand root inode md: rc = %d\n", err);
 537                 ptlrpc_req_finished(request);
 538                 GOTO(out_lock_cn_cb, err);
 539         }
 540
 541         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 542         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 543                                             sbi->ll_flags & LL_SBI_32BIT_API),
 544                        &lmd);
 545         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 546         ptlrpc_req_finished(request);
 547
 548         if (root == NULL || IS_ERR(root)) {
 549                 if (lmd.lsm)
 550                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 551 #ifdef CONFIG_FS_POSIX_ACL
 552                 if (lmd.posix_acl) {
 553                         posix_acl_release(lmd.posix_acl);
 554                         lmd.posix_acl = NULL;
 555                 }
 556 #endif
 557                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 558                 root = NULL;
 559                 CERROR("lustre_lite: bad iget4 for root\n");
 560                 GOTO(out_root, err);
 561         }
 562
 563         err = ll_close_thread_start(&sbi->ll_lcq);
 564         if (err) {
 565                 CERROR("cannot start close thread: rc %d\n", err);
 566                 GOTO(out_root, err);
 567         }
 568
 569 #ifdef CONFIG_FS_POSIX_ACL
 570         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 571                 rct_init(&sbi->ll_rct);
 572                 et_init(&sbi->ll_et);
 573         }
 574 #endif
 575
 576         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 577         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 578                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 579                                  NULL);
 580         cl_sb_init(sb);
 581
 582         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 583                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 584                                  &sbi->ll_cache, NULL);
 585
 586         sb->s_root = d_make_root(root);
 587         if (sb->s_root == NULL) {
 588                 CERROR("%s: can't make root dentry\n",
 589                         ll_get_fsname(sb, NULL, 0));
 590                 GOTO(out_root, err = -ENOMEM);
 591         }
 592
 593 #ifdef HAVE_DCACHE_LOCK
 594         sb->s_root->d_op = &ll_d_root_ops;
 595 #else
 596         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 597         d_set_d_op(sb->s_root, &ll_d_root_ops);
 598         sb->s_d_op = &ll_d_ops;
 599 #endif
 600
 601         sbi->ll_sdev_orig = sb->s_dev;
 602
 603         /* We set sb->s_dev equal on all lustre clients in order to support
 604          * NFS export clustering.  NFSD requires that the FSID be the same
 605          * on all clients. */
 606         /* s_dev is also used in lt_compare() to compare two fs, but that is
 607          * only a node-local comparison. */
 608         uuid = obd_get_uuid(sbi->ll_md_exp);
 609         if (uuid != NULL) {
 610                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 611                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 612         }
 613
 614         if (data != NULL)
 615                 OBD_FREE_PTR(data);
 616         if (osfs != NULL)
 617                 OBD_FREE_PTR(osfs);
 618
 619         RETURN(err);
 620 out_root:
 621         if (root)
 622                 iput(root);
 623 out_lock_cn_cb:
 624         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 625 out_dt:
 626         obd_disconnect(sbi->ll_dt_exp);
 627         sbi->ll_dt_exp = NULL;
 628         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 629         obd_zombie_barrier();
 630 out_md_fid:
 631         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 632 out_md:
 633         obd_disconnect(sbi->ll_md_exp);
 634         sbi->ll_md_exp = NULL;
 635 out:
 636         if (data != NULL)
 637                 OBD_FREE_PTR(data);
 638         if (osfs != NULL)
 639                 OBD_FREE_PTR(osfs);
 640         lprocfs_unregister_mountpoint(sbi);
 641         return err;
 642 }
 643
 644 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 645 {
 646         int size, rc;
 647
 648         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 649         size = sizeof(int);
 650         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 651                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 652         if (rc)
 653                 CERROR("Get max mdsize error rc %d \n", rc);
 654
 655         RETURN(rc);
 656 }
 657
 658 void ll_dump_inode(struct inode *inode)
 659 {
 660         struct ll_d_hlist_node *tmp;
 661         int dentry_count = 0;
 662
 663         LASSERT(inode != NULL);
 664
 665         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 666                 dentry_count++;
 667
 668         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 669                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 670                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 671 }
 672
 673 void lustre_dump_dentry(struct dentry *dentry, int recur)
 674 {
 675         struct list_head *tmp;
 676         int subdirs = 0;
 677
 678         LASSERT(dentry != NULL);
 679
 680         list_for_each(tmp, &dentry->d_subdirs)
 681                 subdirs++;
 682
 683         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 684                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 685                dentry->d_name.len, dentry->d_name.name,
 686                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 687                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 688                dentry->d_flags, dentry->d_fsdata, subdirs);
 689         if (dentry->d_inode != NULL)
 690                 ll_dump_inode(dentry->d_inode);
 691
 692         if (recur == 0)
 693                 return;
 694
 695         list_for_each(tmp, &dentry->d_subdirs) {
 696                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 697                 lustre_dump_dentry(d, recur - 1);
 698         }
 699 }
 700
 701 void client_common_put_super(struct super_block *sb)
 702 {
 703         struct ll_sb_info *sbi = ll_s2sbi(sb);
 704         ENTRY;
 705
 706 #ifdef CONFIG_FS_POSIX_ACL
 707         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 708                 et_fini(&sbi->ll_et);
 709                 rct_fini(&sbi->ll_rct);
 710         }
 711 #endif
 712
 713         ll_close_thread_shutdown(sbi->ll_lcq);
 714
 715         cl_sb_fini(sb);
 716
 717         cfs_list_del(&sbi->ll_conn_chain);
 718
 719         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 720         obd_disconnect(sbi->ll_dt_exp);
 721         sbi->ll_dt_exp = NULL;
 722         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 723          * see LU-2543. */
 724         obd_zombie_barrier();
 725
 726         lprocfs_unregister_mountpoint(sbi);
 727
 728         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 729         obd_disconnect(sbi->ll_md_exp);
 730         sbi->ll_md_exp = NULL;
 731
 732         EXIT;
 733 }
 734
 735 void ll_kill_super(struct super_block *sb)
 736 {
 737         struct ll_sb_info *sbi;
 738
 739         ENTRY;
 740
 741         /* not init sb ?*/
 742         if (!(sb->s_flags & MS_ACTIVE))
 743                 return;
 744
 745         sbi = ll_s2sbi(sb);
 746         /* we need restore s_dev from changed for clustred NFS before put_super
 747          * because new kernels have cached s_dev and change sb->s_dev in
 748          * put_super not affected real removing devices */
 749         if (sbi) {
 750                 sb->s_dev = sbi->ll_sdev_orig;
 751                 sbi->ll_umounting = 1;
 752         }
 753         EXIT;
 754 }
 755
 756 char *ll_read_opt(const char *opt, char *data)
 757 {
 758         char *value;
 759         char *retval;
 760         ENTRY;
 761
 762         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 763         if (strncmp(opt, data, strlen(opt)))
 764                 RETURN(NULL);
 765         if ((value = strchr(data, '=')) == NULL)
 766                 RETURN(NULL);
 767
 768         value++;
 769         OBD_ALLOC(retval, strlen(value) + 1);
 770         if (!retval) {
 771                 CERROR("out of memory!\n");
 772                 RETURN(NULL);
 773         }
 774
 775         memcpy(retval, value, strlen(value)+1);
 776         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 777         RETURN(retval);
 778 }
 779
 780 static inline int ll_set_opt(const char *opt, char *data, int fl)
 781 {
 782         if (strncmp(opt, data, strlen(opt)) != 0)
 783                 return(0);
 784         else
 785                 return(fl);
 786 }
 787
 788 /* non-client-specific mount options are parsed in lmd_parse */
 789 static int ll_options(char *options, int *flags)
 790 {
 791         int tmp;
 792         char *s1 = options, *s2;
 793         ENTRY;
 794
 795         if (!options)
 796                 RETURN(0);
 797
 798         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 799
 800         while (*s1) {
 801                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 802                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 803                 if (tmp) {
 804                         *flags |= tmp;
 805                         goto next;
 806                 }
 807                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 808                 if (tmp) {
 809                         *flags |= tmp;
 810                         goto next;
 811                 }
 812                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 813                 if (tmp) {
 814                         *flags |= tmp;
 815                         goto next;
 816                 }
 817                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 818                 if (tmp) {
 819                         *flags &= ~tmp;
 820                         goto next;
 821                 }
 822                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 823                 if (tmp) {
 824                         *flags |= tmp;
 825                         goto next;
 826                 }
 827                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 828                 if (tmp) {
 829                         *flags &= ~tmp;
 830                         goto next;
 831                 }
 832 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 833                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 834                 if (tmp) {
 835                         /* Ignore deprecated mount option.  The client will
 836                          * always try to mount with ACL support, whether this
 837                          * is used depends on whether server supports it. */
 838                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 839                                                   "mount option 'acl'.\n");
 840                         goto next;
 841                 }
 842                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 843                 if (tmp) {
 844                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 845                                                   "mount option 'noacl'.\n");
 846                         goto next;
 847                 }
 848 #else
 849 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 850 #endif
 851                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 852                 if (tmp) {
 853                         *flags |= tmp;
 854                         goto next;
 855                 }
 856                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 857                 if (tmp) {
 858                         *flags |= tmp;
 859                         goto next;
 860                 }
 861                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 862                 if (tmp) {
 863                         *flags &= ~tmp;
 864                         goto next;
 865                 }
 866
 867                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 868                 if (tmp) {
 869                         *flags |= tmp;
 870                         goto next;
 871                 }
 872                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 873                 if (tmp) {
 874                         *flags &= ~tmp;
 875                         goto next;
 876                 }
 877                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 878                 if (tmp) {
 879                         *flags |= tmp;
 880                         goto next;
 881                 }
 882                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 883                 if (tmp) {
 884                         *flags &= ~tmp;
 885                         goto next;
 886                 }
 887                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 888                 if (tmp) {
 889                         *flags |= tmp;
 890                         goto next;
 891                 }
 892                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 893                 if (tmp) {
 894                         *flags &= ~tmp;
 895                         goto next;
 896                 }
 897                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 898                 if (tmp) {
 899                         *flags |= tmp;
 900                         goto next;
 901                 }
 902                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 903                 if (tmp) {
 904                         *flags |= tmp;
 905                         goto next;
 906                 }
 907                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 908                 if (tmp) {
 909                         *flags |= tmp;
 910                         goto next;
 911                 }
 912                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 913                 if (tmp) {
 914                         *flags &= ~tmp;
 915                         goto next;
 916                 }
 917                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 918                                    s1);
 919                 RETURN(-EINVAL);
 920
 921 next:
 922                 /* Find next opt */
 923                 s2 = strchr(s1, ',');
 924                 if (s2 == NULL)
 925                         break;
 926                 s1 = s2 + 1;
 927         }
 928         RETURN(0);
 929 }
 930
 931 void ll_lli_init(struct ll_inode_info *lli)
 932 {
 933         lli->lli_inode_magic = LLI_INODE_MAGIC;
 934         lli->lli_flags = 0;
 935         lli->lli_ioepoch = 0;
 936         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 937         spin_lock_init(&lli->lli_lock);
 938         lli->lli_posix_acl = NULL;
 939         lli->lli_remote_perms = NULL;
 940         mutex_init(&lli->lli_rmtperm_mutex);
 941         /* Do not set lli_fid, it has been initialized already. */
 942         fid_zero(&lli->lli_pfid);
 943         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 944         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 945         cfs_atomic_set(&lli->lli_open_count, 0);
 946         lli->lli_mds_capa = NULL;
 947         lli->lli_rmtperm_time = 0;
 948         lli->lli_pending_och = NULL;
 949         lli->lli_mds_read_och = NULL;
 950         lli->lli_mds_write_och = NULL;
 951         lli->lli_mds_exec_och = NULL;
 952         lli->lli_open_fd_read_count = 0;
 953         lli->lli_open_fd_write_count = 0;
 954         lli->lli_open_fd_exec_count = 0;
 955         mutex_init(&lli->lli_och_mutex);
 956         spin_lock_init(&lli->lli_agl_lock);
 957         lli->lli_has_smd = false;
 958         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 959         lli->lli_clob = NULL;
 960
 961         init_rwsem(&lli->lli_xattrs_list_rwsem);
 962         mutex_init(&lli->lli_xattrs_enq_lock);
 963
 964         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 965         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 966                 mutex_init(&lli->lli_readdir_mutex);
 967                 lli->lli_opendir_key = NULL;
 968                 lli->lli_sai = NULL;
 969                 lli->lli_def_acl = NULL;
 970                 spin_lock_init(&lli->lli_sa_lock);
 971                 lli->lli_opendir_pid = 0;
 972         } else {
 973                 sema_init(&lli->lli_size_sem, 1);
 974                 lli->lli_size_sem_owner = NULL;
 975                 lli->lli_symlink_name = NULL;
 976                 init_rwsem(&lli->lli_trunc_sem);
 977                 mutex_init(&lli->lli_write_mutex);
 978                 init_rwsem(&lli->lli_glimpse_sem);
 979                 lli->lli_glimpse_time = 0;
 980                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 981                 lli->lli_agl_index = 0;
 982                 lli->lli_async_rc = 0;
 983                 lli->lli_volatile = false;
 984         }
 985         mutex_init(&lli->lli_layout_mutex);
 986 }
 987
 988 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 989 {
 990         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 991
 992         bdi->name = "lustre";
 993         return bdi_register(bdi, NULL, "lustre-%d",
 994                             atomic_inc_return(&ll_bdi_num));
 995 }
 996
 997 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 998 {
 999         struct lustre_profile *lprof = NULL;
1000         struct lustre_sb_info *lsi = s2lsi(sb);
1001         struct ll_sb_info *sbi;
1002         char  *dt = NULL, *md = NULL;
1003         char  *profilenm = get_profile_name(sb);
1004         struct config_llog_instance *cfg;
1005         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1006         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1007         int    err;
1008         ENTRY;
1009
1010         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1011
1012         OBD_ALLOC_PTR(cfg);
1013         if (cfg == NULL)
1014                 RETURN(-ENOMEM);
1015
1016         cfs_module_get();
1017
1018         /* client additional sb info */
1019         lsi->lsi_llsbi = sbi = ll_init_sbi();
1020         if (!sbi) {
1021                 cfs_module_put(THIS_MODULE);
1022                 OBD_FREE_PTR(cfg);
1023                 RETURN(-ENOMEM);
1024         }
1025
1026         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1027         if (err)
1028                 GOTO(out_free, err);
1029
1030         err = bdi_init(&lsi->lsi_bdi);
1031         if (err)
1032                 GOTO(out_free, err);
1033         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1034         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1035         err = ll_bdi_register(&lsi->lsi_bdi);
1036         if (err)
1037                 GOTO(out_free, err);
1038
1039         sb->s_bdi = &lsi->lsi_bdi;
1040
1041         /* Generate a string unique to this super, in case some joker tries
1042            to mount the same fs at two mount points.
1043            Use the address of the super itself.*/
1044         cfg->cfg_instance = sb;
1045         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1046         cfg->cfg_callback = class_config_llog_handler;
1047         /* set up client obds */
1048         err = lustre_process_log(sb, profilenm, cfg);
1049         if (err < 0) {
1050                 CERROR("Unable to process log: %d\n", err);
1051                 GOTO(out_free, err);
1052         }
1053
1054         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1055         lprof = class_get_profile(profilenm);
1056         if (lprof == NULL) {
1057                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1058                                    " read from the MGS.  Does that filesystem "
1059                                    "exist?\n", profilenm);
1060                 GOTO(out_free, err = -EINVAL);
1061         }
1062         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1063                lprof->lp_md, lprof->lp_dt);
1064
1065         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1066         if (!dt)
1067                 GOTO(out_free, err = -ENOMEM);
1068         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1069
1070         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1071         if (!md)
1072                 GOTO(out_free, err = -ENOMEM);
1073         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1074
1075         /* connections, registrations, sb setup */
1076         err = client_common_fill_super(sb, md, dt, mnt);
1077
1078 out_free:
1079         if (md)
1080                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1081         if (dt)
1082                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1083         if (err)
1084                 ll_put_super(sb);
1085         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1086                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1087
1088         OBD_FREE_PTR(cfg);
1089         RETURN(err);
1090 } /* ll_fill_super */
1091
1092
1093 void lu_context_keys_dump(void);
1094
1095 void ll_put_super(struct super_block *sb)
1096 {
1097         struct config_llog_instance cfg;
1098         struct obd_device *obd;
1099         struct lustre_sb_info *lsi = s2lsi(sb);
1100         struct ll_sb_info *sbi = ll_s2sbi(sb);
1101         char *profilenm = get_profile_name(sb);
1102         int force = 1, next;
1103         ENTRY;
1104
1105         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1106
1107         ll_print_capa_stat(sbi);
1108
1109         cfg.cfg_instance = sb;
1110         lustre_end_log(sb, profilenm, &cfg);
1111
1112         if (sbi->ll_md_exp) {
1113                 obd = class_exp2obd(sbi->ll_md_exp);
1114                 if (obd)
1115                         force = obd->obd_force;
1116         }
1117
1118         /* We need to set force before the lov_disconnect in
1119            lustre_common_put_super, since l_d cleans up osc's as well. */
1120         if (force) {
1121                 next = 0;
1122                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1123                                                      &next)) != NULL) {
1124                         obd->obd_force = force;
1125                 }
1126         }
1127
1128         if (sbi->ll_lcq) {
1129                 /* Only if client_common_fill_super succeeded */
1130                 client_common_put_super(sb);
1131         }
1132
1133         next = 0;
1134         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1135                 class_manual_cleanup(obd);
1136         }
1137
1138         if (sbi->ll_flags & LL_SBI_VERBOSE)
1139                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1140
1141         if (profilenm)
1142                 class_del_profile(profilenm);
1143
1144         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1145                 bdi_destroy(&lsi->lsi_bdi);
1146                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1147         }
1148
1149         ll_free_sbi(sb);
1150         lsi->lsi_llsbi = NULL;
1151
1152         lustre_common_put_super(sb);
1153
1154         cfs_module_put(THIS_MODULE);
1155
1156         EXIT;
1157 } /* client_put_super */
1158
1159 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1160 {
1161         struct inode *inode = NULL;
1162
1163         /* NOTE: we depend on atomic igrab() -bzzz */
1164         lock_res_and_lock(lock);
1165         if (lock->l_resource->lr_lvb_inode) {
1166                 struct ll_inode_info * lli;
1167                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1168                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1169                         inode = igrab(lock->l_resource->lr_lvb_inode);
1170                 } else {
1171                         inode = lock->l_resource->lr_lvb_inode;
1172                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1173                                          D_WARNING, lock, "lr_lvb_inode %p is "
1174                                          "bogus: magic %08x",
1175                                          lock->l_resource->lr_lvb_inode,
1176                                          lli->lli_inode_magic);
1177                         inode = NULL;
1178                 }
1179         }
1180         unlock_res_and_lock(lock);
1181         return inode;
1182 }
1183
1184 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1185 {
1186         struct inode *inode = NULL;
1187         /* NOTE: we depend on atomic igrab() -bzzz */
1188         lock_res_and_lock(lock);
1189         if (lock->l_ast_data) {
1190                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1191                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1192                         inode = igrab(lock->l_ast_data);
1193                 } else {
1194                         inode = lock->l_ast_data;
1195                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1196                                          D_WARNING, lock, "l_ast_data %p is "
1197                                          "bogus: magic %08x", lock->l_ast_data,
1198                                          lli->lli_inode_magic);
1199                         inode = NULL;
1200                 }
1201         }
1202         unlock_res_and_lock(lock);
1203         return inode;
1204 }
1205
1206 void ll_clear_inode(struct inode *inode)
1207 {
1208         struct ll_inode_info *lli = ll_i2info(inode);
1209         struct ll_sb_info *sbi = ll_i2sbi(inode);
1210         ENTRY;
1211
1212         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1213                inode->i_generation, inode);
1214
1215         if (S_ISDIR(inode->i_mode)) {
1216                 /* these should have been cleared in ll_file_release */
1217                 LASSERT(lli->lli_opendir_key == NULL);
1218                 LASSERT(lli->lli_sai == NULL);
1219                 LASSERT(lli->lli_opendir_pid == 0);
1220         }
1221
1222         spin_lock(&lli->lli_lock);
1223         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1224         spin_unlock(&lli->lli_lock);
1225         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1226
1227         LASSERT(!lli->lli_open_fd_write_count);
1228         LASSERT(!lli->lli_open_fd_read_count);
1229         LASSERT(!lli->lli_open_fd_exec_count);
1230
1231         if (lli->lli_mds_write_och)
1232                 ll_md_real_close(inode, FMODE_WRITE);
1233         if (lli->lli_mds_exec_och)
1234                 ll_md_real_close(inode, FMODE_EXEC);
1235         if (lli->lli_mds_read_och)
1236                 ll_md_real_close(inode, FMODE_READ);
1237
1238         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1239                 OBD_FREE(lli->lli_symlink_name,
1240                          strlen(lli->lli_symlink_name) + 1);
1241                 lli->lli_symlink_name = NULL;
1242         }
1243
1244         ll_xattr_cache_destroy(inode);
1245
1246         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1247                 LASSERT(lli->lli_posix_acl == NULL);
1248                 if (lli->lli_remote_perms) {
1249                         free_rmtperm_hash(lli->lli_remote_perms);
1250                         lli->lli_remote_perms = NULL;
1251                 }
1252         }
1253 #ifdef CONFIG_FS_POSIX_ACL
1254         else if (lli->lli_posix_acl) {
1255                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1256                 LASSERT(lli->lli_remote_perms == NULL);
1257                 posix_acl_release(lli->lli_posix_acl);
1258                 lli->lli_posix_acl = NULL;
1259         }
1260 #endif
1261         lli->lli_inode_magic = LLI_INODE_DEAD;
1262
1263         ll_clear_inode_capas(inode);
1264         if (!S_ISDIR(inode->i_mode))
1265                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1266
1267         /*
1268          * XXX This has to be done before lsm is freed below, because
1269          * cl_object still uses inode lsm.
1270          */
1271         cl_inode_fini(inode);
1272         lli->lli_has_smd = false;
1273
1274         EXIT;
1275 }
1276
1277 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1278                   struct md_open_data **mod)
1279 {
1280         struct lustre_md md;
1281         struct inode *inode = dentry->d_inode;
1282         struct ll_sb_info *sbi = ll_i2sbi(inode);
1283         struct ptlrpc_request *request = NULL;
1284         int rc, ia_valid;
1285         ENTRY;
1286
1287         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1288                                      LUSTRE_OPC_ANY, NULL);
1289         if (IS_ERR(op_data))
1290                 RETURN(PTR_ERR(op_data));
1291
1292         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1293                         &request, mod);
1294         if (rc) {
1295                 ptlrpc_req_finished(request);
1296                 if (rc == -ENOENT) {
1297                         clear_nlink(inode);
1298                         /* Unlinked special device node? Or just a race?
1299                          * Pretend we done everything. */
1300                         if (!S_ISREG(inode->i_mode) &&
1301                             !S_ISDIR(inode->i_mode)) {
1302                                 ia_valid = op_data->op_attr.ia_valid;
1303                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1304                                 rc = simple_setattr(dentry, &op_data->op_attr);
1305                                 op_data->op_attr.ia_valid = ia_valid;
1306                         }
1307                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1308                         CERROR("md_setattr fails: rc = %d\n", rc);
1309                 }
1310                 RETURN(rc);
1311         }
1312
1313         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1314                               sbi->ll_md_exp, &md);
1315         if (rc) {
1316                 ptlrpc_req_finished(request);
1317                 RETURN(rc);
1318         }
1319
1320         ia_valid = op_data->op_attr.ia_valid;
1321         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1322          * cache is not cleared yet. */
1323         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1324         rc = simple_setattr(dentry, &op_data->op_attr);
1325         op_data->op_attr.ia_valid = ia_valid;
1326
1327         /* Extract epoch data if obtained. */
1328         op_data->op_handle = md.body->handle;
1329         op_data->op_ioepoch = md.body->ioepoch;
1330
1331         ll_update_inode(inode, &md);
1332         ptlrpc_req_finished(request);
1333
1334         RETURN(rc);
1335 }
1336
1337 /* Close IO epoch and send Size-on-MDS attribute update. */
1338 static int ll_setattr_done_writing(struct inode *inode,
1339                                    struct md_op_data *op_data,
1340                                    struct md_open_data *mod)
1341 {
1342         struct ll_inode_info *lli = ll_i2info(inode);
1343         int rc = 0;
1344         ENTRY;
1345
1346         LASSERT(op_data != NULL);
1347         if (!S_ISREG(inode->i_mode))
1348                 RETURN(0);
1349
1350         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1351                op_data->op_ioepoch, PFID(&lli->lli_fid));
1352
1353         op_data->op_flags = MF_EPOCH_CLOSE;
1354         ll_done_writing_attr(inode, op_data);
1355         ll_pack_inode2opdata(inode, op_data, NULL);
1356
1357         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1358         if (rc == -EAGAIN) {
1359                 /* MDS has instructed us to obtain Size-on-MDS attribute
1360                  * from OSTs and send setattr to back to MDS. */
1361                 rc = ll_som_update(inode, op_data);
1362         } else if (rc) {
1363                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1364                        inode->i_ino, rc);
1365         }
1366         RETURN(rc);
1367 }
1368
1369 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1370 {
1371         struct obd_capa *capa;
1372         int rc;
1373
1374         if (attr->ia_valid & ATTR_SIZE)
1375                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1376         else
1377                 capa = ll_mdscapa_get(inode);
1378
1379         rc = cl_setattr_ost(inode, attr, capa);
1380
1381         if (attr->ia_valid & ATTR_SIZE)
1382                 ll_truncate_free_capa(capa);
1383         else
1384                 capa_put(capa);
1385
1386         return rc;
1387 }
1388
1389 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1390  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1391  * keep these values until such a time that objects are allocated for it.
1392  * We do the MDS operations first, as it is checking permissions for us.
1393  * We don't to the MDS RPC if there is nothing that we want to store there,
1394  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1395  * going to do an RPC anyways.
1396  *
1397  * If we are doing a truncate, we will send the mtime and ctime updates
1398  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1399  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1400  * at the same time.
1401  *
1402  * In case of HSMimport, we only set attr on MDS.
1403  */
1404 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1405 {
1406         struct inode *inode = dentry->d_inode;
1407         struct ll_inode_info *lli = ll_i2info(inode);
1408         struct md_op_data *op_data = NULL;
1409         struct md_open_data *mod = NULL;
1410         bool file_is_released = false;
1411         int rc = 0, rc1 = 0;
1412         ENTRY;
1413
1414         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1415                 "valid %x, hsm_import %d\n",
1416                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1417                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1418                 attr->ia_valid, hsm_import);
1419
1420         if (attr->ia_valid & ATTR_SIZE) {
1421                 /* Check new size against VFS/VM file size limit and rlimit */
1422                 rc = inode_newsize_ok(inode, attr->ia_size);
1423                 if (rc)
1424                         RETURN(rc);
1425
1426                 /* The maximum Lustre file size is variable, based on the
1427                  * OST maximum object size and number of stripes.  This
1428                  * needs another check in addition to the VFS check above. */
1429                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1430                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1431                                PFID(&lli->lli_fid), attr->ia_size,
1432                                ll_file_maxbytes(inode));
1433                         RETURN(-EFBIG);
1434                 }
1435
1436                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1437         }
1438
1439         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1440         if (attr->ia_valid & TIMES_SET_FLAGS) {
1441                 if (cfs_curproc_fsuid() != inode->i_uid &&
1442                     !cfs_capable(CFS_CAP_FOWNER))
1443                         RETURN(-EPERM);
1444         }
1445
1446         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1447         if (attr->ia_valid & ATTR_CTIME) {
1448                 attr->ia_ctime = CFS_CURRENT_TIME;
1449                 attr->ia_valid |= ATTR_CTIME_SET;
1450         }
1451         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1452             (attr->ia_valid & ATTR_ATIME)) {
1453                 attr->ia_atime = CFS_CURRENT_TIME;
1454                 attr->ia_valid |= ATTR_ATIME_SET;
1455         }
1456         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1457             (attr->ia_valid & ATTR_MTIME)) {
1458                 attr->ia_mtime = CFS_CURRENT_TIME;
1459                 attr->ia_valid |= ATTR_MTIME_SET;
1460         }
1461
1462         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1463                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1464                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1465                        cfs_time_current_sec());
1466
1467         /* If we are changing file size, file content is modified, flag it. */
1468         if (attr->ia_valid & ATTR_SIZE) {
1469                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1470                 spin_lock(&lli->lli_lock);
1471                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1472                 spin_unlock(&lli->lli_lock);
1473         }
1474
1475         /* We always do an MDS RPC, even if we're only changing the size;
1476          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1477
1478         OBD_ALLOC_PTR(op_data);
1479         if (op_data == NULL)
1480                 RETURN(-ENOMEM);
1481
1482         if (!S_ISDIR(inode->i_mode)) {
1483                 if (attr->ia_valid & ATTR_SIZE)
1484                         inode_dio_write_done(inode);
1485                 mutex_unlock(&inode->i_mutex);
1486                 down_write(&lli->lli_trunc_sem);
1487         }
1488
1489         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1490
1491         /* Open epoch for truncate. */
1492         if (exp_connect_som(ll_i2mdexp(inode)) &&
1493             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1494                 op_data->op_flags = MF_EPOCH_OPEN;
1495
1496         /* truncate on a released file must failed with -ENODATA,
1497          * so size must not be set on MDS for released file
1498          * but other attributes must be set
1499          */
1500         if (S_ISREG(inode->i_mode)) {
1501                 struct lov_stripe_md *lsm;
1502                 __u32 gen;
1503
1504                 ll_layout_refresh(inode, &gen);
1505                 lsm = ccc_inode_lsm_get(inode);
1506                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1507                         file_is_released = true;
1508                 ccc_inode_lsm_put(inode, lsm);
1509         }
1510
1511         /* if not in HSM import mode, clear size attr for released file
1512          * we clear the attribute send to MDT in op_data, not the original
1513          * received from caller in attr which is used later to
1514          * decide return code */
1515         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1516                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1517
1518         rc = ll_md_setattr(dentry, op_data, &mod);
1519         if (rc)
1520                 GOTO(out, rc);
1521
1522         /* truncate failed (only when non HSM import), others succeed */
1523         if (file_is_released) {
1524                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1525                         GOTO(out, rc = -ENODATA);
1526                 else
1527                         GOTO(out, rc = 0);
1528         }
1529
1530         /* RPC to MDT is sent, cancel data modification flag */
1531         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1532                 spin_lock(&lli->lli_lock);
1533                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1534                 spin_unlock(&lli->lli_lock);
1535         }
1536
1537         ll_ioepoch_open(lli, op_data->op_ioepoch);
1538         if (!S_ISREG(inode->i_mode))
1539                 GOTO(out, rc = 0);
1540
1541         if (attr->ia_valid & (ATTR_SIZE |
1542                               ATTR_ATIME | ATTR_ATIME_SET |
1543                               ATTR_MTIME | ATTR_MTIME_SET)) {
1544                 /* For truncate and utimes sending attributes to OSTs, setting
1545                  * mtime/atime to the past will be performed under PW [0:EOF]
1546                  * extent lock (new_size:EOF for truncate).  It may seem
1547                  * excessive to send mtime/atime updates to OSTs when not
1548                  * setting times to past, but it is necessary due to possible
1549                  * time de-synchronization between MDT inode and OST objects */
1550                 rc = ll_setattr_ost(inode, attr);
1551         }
1552         EXIT;
1553 out:
1554         if (op_data) {
1555                 if (op_data->op_ioepoch) {
1556                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1557                         if (!rc)
1558                                 rc = rc1;
1559                 }
1560                 ll_finish_md_op_data(op_data);
1561         }
1562         if (!S_ISDIR(inode->i_mode)) {
1563                 up_write(&lli->lli_trunc_sem);
1564                 mutex_lock(&inode->i_mutex);
1565                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1566                         inode_dio_wait(inode);
1567         }
1568
1569         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1570                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1571
1572         return rc;
1573 }
1574
1575 int ll_setattr(struct dentry *de, struct iattr *attr)
1576 {
1577         int mode = de->d_inode->i_mode;
1578
1579         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1580                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1581                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1582
1583         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1584                                (ATTR_SIZE|ATTR_MODE)) &&
1585             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1586              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1587               !(attr->ia_mode & S_ISGID))))
1588                 attr->ia_valid |= ATTR_FORCE;
1589
1590         if ((mode & S_ISUID) &&
1591             !(attr->ia_mode & S_ISUID) &&
1592             !(attr->ia_valid & ATTR_KILL_SUID))
1593                 attr->ia_valid |= ATTR_KILL_SUID;
1594
1595         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1596             !(attr->ia_mode & S_ISGID) &&
1597             !(attr->ia_valid & ATTR_KILL_SGID))
1598                 attr->ia_valid |= ATTR_KILL_SGID;
1599
1600         return ll_setattr_raw(de, attr, false);
1601 }
1602
1603 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1604                        __u64 max_age, __u32 flags)
1605 {
1606         struct ll_sb_info *sbi = ll_s2sbi(sb);
1607         struct obd_statfs obd_osfs;
1608         int rc;
1609         ENTRY;
1610
1611         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1612         if (rc) {
1613                 CERROR("md_statfs fails: rc = %d\n", rc);
1614                 RETURN(rc);
1615         }
1616
1617         osfs->os_type = sb->s_magic;
1618
1619         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1620                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1621
1622         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1623                 flags |= OBD_STATFS_NODELAY;
1624
1625         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1626         if (rc) {
1627                 CERROR("obd_statfs fails: rc = %d\n", rc);
1628                 RETURN(rc);
1629         }
1630
1631         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1632                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1633                obd_osfs.os_files);
1634
1635         osfs->os_bsize = obd_osfs.os_bsize;
1636         osfs->os_blocks = obd_osfs.os_blocks;
1637         osfs->os_bfree = obd_osfs.os_bfree;
1638         osfs->os_bavail = obd_osfs.os_bavail;
1639
1640         /* If we don't have as many objects free on the OST as inodes
1641          * on the MDS, we reduce the total number of inodes to
1642          * compensate, so that the "inodes in use" number is correct.
1643          */
1644         if (obd_osfs.os_ffree < osfs->os_ffree) {
1645                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1646                         obd_osfs.os_ffree;
1647                 osfs->os_ffree = obd_osfs.os_ffree;
1648         }
1649
1650         RETURN(rc);
1651 }
1652 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1653 {
1654         struct super_block *sb = de->d_sb;
1655         struct obd_statfs osfs;
1656         int rc;
1657
1658         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1659         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1660
1661         /* Some amount of caching on the client is allowed */
1662         rc = ll_statfs_internal(sb, &osfs,
1663                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1664                                 0);
1665         if (rc)
1666                 return rc;
1667
1668         statfs_unpack(sfs, &osfs);
1669
1670         /* We need to downshift for all 32-bit kernels, because we can't
1671          * tell if the kernel is being called via sys_statfs64() or not.
1672          * Stop before overflowing f_bsize - in which case it is better
1673          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1674         if (sizeof(long) < 8) {
1675                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1676                         sfs->f_bsize <<= 1;
1677
1678                         osfs.os_blocks >>= 1;
1679                         osfs.os_bfree >>= 1;
1680                         osfs.os_bavail >>= 1;
1681                 }
1682         }
1683
1684         sfs->f_blocks = osfs.os_blocks;
1685         sfs->f_bfree = osfs.os_bfree;
1686         sfs->f_bavail = osfs.os_bavail;
1687         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1688         return 0;
1689 }
1690
1691 void ll_inode_size_lock(struct inode *inode)
1692 {
1693         struct ll_inode_info *lli;
1694
1695         LASSERT(!S_ISDIR(inode->i_mode));
1696
1697         lli = ll_i2info(inode);
1698         LASSERT(lli->lli_size_sem_owner != current);
1699         down(&lli->lli_size_sem);
1700         LASSERT(lli->lli_size_sem_owner == NULL);
1701         lli->lli_size_sem_owner = current;
1702 }
1703
1704 void ll_inode_size_unlock(struct inode *inode)
1705 {
1706         struct ll_inode_info *lli;
1707
1708         lli = ll_i2info(inode);
1709         LASSERT(lli->lli_size_sem_owner == current);
1710         lli->lli_size_sem_owner = NULL;
1711         up(&lli->lli_size_sem);
1712 }
1713
1714 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1715 {
1716         struct ll_inode_info *lli = ll_i2info(inode);
1717         struct mdt_body *body = md->body;
1718         struct lov_stripe_md *lsm = md->lsm;
1719         struct ll_sb_info *sbi = ll_i2sbi(inode);
1720
1721         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1722         if (lsm != NULL) {
1723                 if (!lli->lli_has_smd &&
1724                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1725                         cl_file_inode_init(inode, md);
1726
1727                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1728                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1729                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1730         }
1731
1732         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1733                 if (body->valid & OBD_MD_FLRMTPERM)
1734                         ll_update_remote_perm(inode, md->remote_perm);
1735         }
1736 #ifdef CONFIG_FS_POSIX_ACL
1737         else if (body->valid & OBD_MD_FLACL) {
1738                 spin_lock(&lli->lli_lock);
1739                 if (lli->lli_posix_acl)
1740                         posix_acl_release(lli->lli_posix_acl);
1741                 lli->lli_posix_acl = md->posix_acl;
1742                 spin_unlock(&lli->lli_lock);
1743         }
1744 #endif
1745         inode->i_ino = cl_fid_build_ino(&body->fid1,
1746                                         sbi->ll_flags & LL_SBI_32BIT_API);
1747         inode->i_generation = cl_fid_build_gen(&body->fid1);
1748
1749         if (body->valid & OBD_MD_FLATIME) {
1750                 if (body->atime > LTIME_S(inode->i_atime))
1751                         LTIME_S(inode->i_atime) = body->atime;
1752                 lli->lli_lvb.lvb_atime = body->atime;
1753         }
1754         if (body->valid & OBD_MD_FLMTIME) {
1755                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1756                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1757                                "to "LPU64"\n", inode->i_ino,
1758                                LTIME_S(inode->i_mtime), body->mtime);
1759                         LTIME_S(inode->i_mtime) = body->mtime;
1760                 }
1761                 lli->lli_lvb.lvb_mtime = body->mtime;
1762         }
1763         if (body->valid & OBD_MD_FLCTIME) {
1764                 if (body->ctime > LTIME_S(inode->i_ctime))
1765                         LTIME_S(inode->i_ctime) = body->ctime;
1766                 lli->lli_lvb.lvb_ctime = body->ctime;
1767         }
1768         if (body->valid & OBD_MD_FLMODE)
1769                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1770         if (body->valid & OBD_MD_FLTYPE)
1771                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1772         LASSERT(inode->i_mode != 0);
1773         if (S_ISREG(inode->i_mode)) {
1774                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1775         } else {
1776                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1777         }
1778         if (body->valid & OBD_MD_FLUID)
1779                 inode->i_uid = body->uid;
1780         if (body->valid & OBD_MD_FLGID)
1781                 inode->i_gid = body->gid;
1782         if (body->valid & OBD_MD_FLFLAGS)
1783                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1784         if (body->valid & OBD_MD_FLNLINK)
1785                 set_nlink(inode, body->nlink);
1786         if (body->valid & OBD_MD_FLRDEV)
1787                 inode->i_rdev = old_decode_dev(body->rdev);
1788
1789         if (body->valid & OBD_MD_FLID) {
1790                 /* FID shouldn't be changed! */
1791                 if (fid_is_sane(&lli->lli_fid)) {
1792                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1793                                  "Trying to change FID "DFID
1794                                  " to the "DFID", inode %lu/%u(%p)\n",
1795                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1796                                  inode->i_ino, inode->i_generation, inode);
1797                 } else
1798                         lli->lli_fid = body->fid1;
1799         }
1800
1801         LASSERT(fid_seq(&lli->lli_fid) != 0);
1802
1803         if (body->valid & OBD_MD_FLSIZE) {
1804                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1805                     S_ISREG(inode->i_mode)) {
1806                         struct lustre_handle lockh;
1807                         ldlm_mode_t mode;
1808
1809                         /* As it is possible a blocking ast has been processed
1810                          * by this time, we need to check there is an UPDATE
1811                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1812                          * it. */
1813                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1814                                                &lockh, LDLM_FL_CBPENDING,
1815                                                LCK_CR | LCK_CW |
1816                                                LCK_PR | LCK_PW);
1817                         if (mode) {
1818                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1819                                                       LLIF_EPOCH_PENDING |
1820                                                       LLIF_SOM_DIRTY)) {
1821                                         CERROR("ino %lu flags %u still has "
1822                                                "size authority! do not trust "
1823                                                "the size got from MDS\n",
1824                                                inode->i_ino, lli->lli_flags);
1825                                 } else {
1826                                         /* Use old size assignment to avoid
1827                                          * deadlock bz14138 & bz14326 */
1828                                         i_size_write(inode, body->size);
1829                                         spin_lock(&lli->lli_lock);
1830                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1831                                         spin_unlock(&lli->lli_lock);
1832                                 }
1833                                 ldlm_lock_decref(&lockh, mode);
1834                         }
1835                 } else {
1836                         /* Use old size assignment to avoid
1837                          * deadlock bz14138 & bz14326 */
1838                         i_size_write(inode, body->size);
1839
1840                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1841                                inode->i_ino, (unsigned long long)body->size);
1842                 }
1843
1844                 if (body->valid & OBD_MD_FLBLOCKS)
1845                         inode->i_blocks = body->blocks;
1846         }
1847
1848         if (body->valid & OBD_MD_FLMDSCAPA) {
1849                 LASSERT(md->mds_capa);
1850                 ll_add_capa(inode, md->mds_capa);
1851         }
1852         if (body->valid & OBD_MD_FLOSSCAPA) {
1853                 LASSERT(md->oss_capa);
1854                 ll_add_capa(inode, md->oss_capa);
1855         }
1856
1857         if (body->valid & OBD_MD_TSTATE) {
1858                 if (body->t_state & MS_RESTORE)
1859                         lli->lli_flags |= LLIF_FILE_RESTORING;
1860         }
1861 }
1862
1863 void ll_read_inode2(struct inode *inode, void *opaque)
1864 {
1865         struct lustre_md *md = opaque;
1866         struct ll_inode_info *lli = ll_i2info(inode);
1867         ENTRY;
1868
1869         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1870                PFID(&lli->lli_fid), inode);
1871
1872         LASSERT(!lli->lli_has_smd);
1873
1874         /* Core attributes from the MDS first.  This is a new inode, and
1875          * the VFS doesn't zero times in the core inode so we have to do
1876          * it ourselves.  They will be overwritten by either MDS or OST
1877          * attributes - we just need to make sure they aren't newer. */
1878         LTIME_S(inode->i_mtime) = 0;
1879         LTIME_S(inode->i_atime) = 0;
1880         LTIME_S(inode->i_ctime) = 0;
1881         inode->i_rdev = 0;
1882         ll_update_inode(inode, md);
1883
1884         /* OIDEBUG(inode); */
1885
1886         /* initializing backing dev info. */
1887         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1888
1889
1890         if (S_ISREG(inode->i_mode)) {
1891                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1892                 inode->i_op = &ll_file_inode_operations;
1893                 inode->i_fop = sbi->ll_fop;
1894                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1895                 EXIT;
1896         } else if (S_ISDIR(inode->i_mode)) {
1897                 inode->i_op = &ll_dir_inode_operations;
1898                 inode->i_fop = &ll_dir_operations;
1899                 EXIT;
1900         } else if (S_ISLNK(inode->i_mode)) {
1901                 inode->i_op = &ll_fast_symlink_inode_operations;
1902                 EXIT;
1903         } else {
1904                 inode->i_op = &ll_special_inode_operations;
1905
1906                 init_special_inode(inode, inode->i_mode,
1907                                    inode->i_rdev);
1908
1909                 EXIT;
1910         }
1911 }
1912
1913 void ll_delete_inode(struct inode *inode)
1914 {
1915         struct cl_inode_info *lli = cl_i2info(inode);
1916         ENTRY;
1917
1918         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1919                 /* discard all dirty pages before truncating them, required by
1920                  * osc_extent implementation at LU-1030. */
1921                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1922                                    CL_FSYNC_DISCARD, 1);
1923
1924         truncate_inode_pages(&inode->i_data, 0);
1925
1926         /* Workaround for LU-118 */
1927         if (inode->i_data.nrpages) {
1928                 TREE_READ_LOCK_IRQ(&inode->i_data);
1929                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1930                 LASSERTF(inode->i_data.nrpages == 0,
1931                          "inode=%lu/%u(%p) nrpages=%lu, see "
1932                          "http://jira.whamcloud.com/browse/LU-118\n",
1933                          inode->i_ino, inode->i_generation, inode,
1934                          inode->i_data.nrpages);
1935         }
1936         /* Workaround end */
1937
1938 #ifdef HAVE_SBOPS_EVICT_INODE
1939         ll_clear_inode(inode);
1940 #endif
1941         clear_inode(inode);
1942
1943         EXIT;
1944 }
1945
1946 int ll_iocontrol(struct inode *inode, struct file *file,
1947                  unsigned int cmd, unsigned long arg)
1948 {
1949         struct ll_sb_info *sbi = ll_i2sbi(inode);
1950         struct ptlrpc_request *req = NULL;
1951         int rc, flags = 0;
1952         ENTRY;
1953
1954         switch(cmd) {
1955         case FSFILT_IOC_GETFLAGS: {
1956                 struct mdt_body *body;
1957                 struct md_op_data *op_data;
1958
1959                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1960                                              0, 0, LUSTRE_OPC_ANY,
1961                                              NULL);
1962                 if (IS_ERR(op_data))
1963                         RETURN(PTR_ERR(op_data));
1964
1965                 op_data->op_valid = OBD_MD_FLFLAGS;
1966                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1967                 ll_finish_md_op_data(op_data);
1968                 if (rc) {
1969                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1970                         RETURN(-abs(rc));
1971                 }
1972
1973                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1974
1975                 flags = body->flags;
1976
1977                 ptlrpc_req_finished(req);
1978
1979                 RETURN(put_user(flags, (int *)arg));
1980         }
1981         case FSFILT_IOC_SETFLAGS: {
1982                 struct lov_stripe_md *lsm;
1983                 struct obd_info oinfo = { { { 0 } } };
1984                 struct md_op_data *op_data;
1985
1986                 if (get_user(flags, (int *)arg))
1987                         RETURN(-EFAULT);
1988
1989                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1990                                              LUSTRE_OPC_ANY, NULL);
1991                 if (IS_ERR(op_data))
1992                         RETURN(PTR_ERR(op_data));
1993
1994                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1995                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1996                 rc = md_setattr(sbi->ll_md_exp, op_data,
1997                                 NULL, 0, NULL, 0, &req, NULL);
1998                 ll_finish_md_op_data(op_data);
1999                 ptlrpc_req_finished(req);
2000                 if (rc)
2001                         RETURN(rc);
2002
2003                 inode->i_flags = ll_ext_to_inode_flags(flags);
2004
2005                 lsm = ccc_inode_lsm_get(inode);
2006                 if (!lsm_has_objects(lsm)) {
2007                         ccc_inode_lsm_put(inode, lsm);
2008                         RETURN(0);
2009                 }
2010
2011                 OBDO_ALLOC(oinfo.oi_oa);
2012                 if (!oinfo.oi_oa) {
2013                         ccc_inode_lsm_put(inode, lsm);
2014                         RETURN(-ENOMEM);
2015                 }
2016                 oinfo.oi_md = lsm;
2017                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2018                 oinfo.oi_oa->o_flags = flags;
2019                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2020                                        OBD_MD_FLGROUP;
2021                 oinfo.oi_capa = ll_mdscapa_get(inode);
2022                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2023                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2024                 capa_put(oinfo.oi_capa);
2025                 OBDO_FREE(oinfo.oi_oa);
2026                 ccc_inode_lsm_put(inode, lsm);
2027
2028                 if (rc && rc != -EPERM && rc != -EACCES)
2029                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2030
2031                 RETURN(rc);
2032         }
2033         default:
2034                 RETURN(-ENOSYS);
2035         }
2036
2037         RETURN(0);
2038 }
2039
2040 int ll_flush_ctx(struct inode *inode)
2041 {
2042         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2043
2044         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2045
2046         obd_set_info_async(NULL, sbi->ll_md_exp,
2047                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2048                            0, NULL, NULL);
2049         obd_set_info_async(NULL, sbi->ll_dt_exp,
2050                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2051                            0, NULL, NULL);
2052         return 0;
2053 }
2054
2055 /* umount -f client means force down, don't save state */
2056 void ll_umount_begin(struct super_block *sb)
2057 {
2058         struct ll_sb_info *sbi = ll_s2sbi(sb);
2059         struct obd_device *obd;
2060         struct obd_ioctl_data *ioc_data;
2061         ENTRY;
2062
2063         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2064                sb->s_count, atomic_read(&sb->s_active));
2065
2066         obd = class_exp2obd(sbi->ll_md_exp);
2067         if (obd == NULL) {
2068                 CERROR("Invalid MDC connection handle "LPX64"\n",
2069                        sbi->ll_md_exp->exp_handle.h_cookie);
2070                 EXIT;
2071                 return;
2072         }
2073         obd->obd_force = 1;
2074
2075         obd = class_exp2obd(sbi->ll_dt_exp);
2076         if (obd == NULL) {
2077                 CERROR("Invalid LOV connection handle "LPX64"\n",
2078                        sbi->ll_dt_exp->exp_handle.h_cookie);
2079                 EXIT;
2080                 return;
2081         }
2082         obd->obd_force = 1;
2083
2084         OBD_ALLOC_PTR(ioc_data);
2085         if (ioc_data) {
2086                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2087                               sizeof *ioc_data, ioc_data, NULL);
2088
2089                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2090                               sizeof *ioc_data, ioc_data, NULL);
2091
2092                 OBD_FREE_PTR(ioc_data);
2093         }
2094
2095         /* Really, we'd like to wait until there are no requests outstanding,
2096          * and then continue.  For now, we just invalidate the requests,
2097          * schedule() and sleep one second if needed, and hope.
2098          */
2099         cfs_schedule();
2100         EXIT;
2101 }
2102
2103 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2104 {
2105         struct ll_sb_info *sbi = ll_s2sbi(sb);
2106         char *profilenm = get_profile_name(sb);
2107         int err;
2108         __u32 read_only;
2109
2110         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2111                 read_only = *flags & MS_RDONLY;
2112                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2113                                          sizeof(KEY_READ_ONLY),
2114                                          KEY_READ_ONLY, sizeof(read_only),
2115                                          &read_only, NULL);
2116                 if (err) {
2117                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2118                                       profilenm, read_only ?
2119                                       "read-only" : "read-write", err);
2120                         return err;
2121                 }
2122
2123                 if (read_only)
2124                         sb->s_flags |= MS_RDONLY;
2125                 else
2126                         sb->s_flags &= ~MS_RDONLY;
2127
2128                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2129                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2130                                       read_only ?  "read-only" : "read-write");
2131         }
2132         return 0;
2133 }
2134
2135 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2136                   struct super_block *sb, struct lookup_intent *it)
2137 {
2138         struct ll_sb_info *sbi = NULL;
2139         struct lustre_md md;
2140         int rc;
2141         ENTRY;
2142
2143         LASSERT(*inode || sb);
2144         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2145         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2146                               sbi->ll_md_exp, &md);
2147         if (rc)
2148                 RETURN(rc);
2149
2150         if (*inode) {
2151                 ll_update_inode(*inode, &md);
2152         } else {
2153                 LASSERT(sb != NULL);
2154
2155                 /*
2156                  * At this point server returns to client's same fid as client
2157                  * generated for creating. So using ->fid1 is okay here.
2158                  */
2159                 LASSERT(fid_is_sane(&md.body->fid1));
2160
2161                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2162                                              sbi->ll_flags & LL_SBI_32BIT_API),
2163                                  &md);
2164                 if (*inode == NULL || IS_ERR(*inode)) {
2165 #ifdef CONFIG_FS_POSIX_ACL
2166                         if (md.posix_acl) {
2167                                 posix_acl_release(md.posix_acl);
2168                                 md.posix_acl = NULL;
2169                         }
2170 #endif
2171                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2172                         *inode = NULL;
2173                         CERROR("new_inode -fatal: rc %d\n", rc);
2174                         GOTO(out, rc);
2175                 }
2176         }
2177
2178         /* Handling piggyback layout lock.
2179          * Layout lock can be piggybacked by getattr and open request.
2180          * The lsm can be applied to inode only if it comes with a layout lock
2181          * otherwise correct layout may be overwritten, for example:
2182          * 1. proc1: mdt returns a lsm but not granting layout
2183          * 2. layout was changed by another client
2184          * 3. proc2: refresh layout and layout lock granted
2185          * 4. proc1: to apply a stale layout */
2186         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2187                 struct lustre_handle lockh;
2188                 struct ldlm_lock *lock;
2189
2190                 lockh.cookie = it->d.lustre.it_lock_handle;
2191                 lock = ldlm_handle2lock(&lockh);
2192                 LASSERT(lock != NULL);
2193                 if (ldlm_has_layout(lock)) {
2194                         struct cl_object_conf conf;
2195
2196                         memset(&conf, 0, sizeof(conf));
2197                         conf.coc_opc = OBJECT_CONF_SET;
2198                         conf.coc_inode = *inode;
2199                         conf.coc_lock = lock;
2200                         conf.u.coc_md = &md;
2201                         (void)ll_layout_conf(*inode, &conf);
2202                 }
2203                 LDLM_LOCK_PUT(lock);
2204         }
2205
2206 out:
2207         if (md.lsm != NULL)
2208                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2209         md_free_lustre_md(sbi->ll_md_exp, &md);
2210         RETURN(rc);
2211 }
2212
2213 int ll_obd_statfs(struct inode *inode, void *arg)
2214 {
2215         struct ll_sb_info *sbi = NULL;
2216         struct obd_export *exp;
2217         char *buf = NULL;
2218         struct obd_ioctl_data *data = NULL;
2219         __u32 type;
2220         __u32 flags;
2221         int len = 0, rc;
2222
2223         if (!inode || !(sbi = ll_i2sbi(inode)))
2224                 GOTO(out_statfs, rc = -EINVAL);
2225
2226         rc = obd_ioctl_getdata(&buf, &len, arg);
2227         if (rc)
2228                 GOTO(out_statfs, rc);
2229
2230         data = (void*)buf;
2231         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2232             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2233                 GOTO(out_statfs, rc = -EINVAL);
2234
2235         if (data->ioc_inllen1 != sizeof(__u32) ||
2236             data->ioc_inllen2 != sizeof(__u32) ||
2237             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2238             data->ioc_plen2 != sizeof(struct obd_uuid))
2239                 GOTO(out_statfs, rc = -EINVAL);
2240
2241         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2242         if (type & LL_STATFS_LMV)
2243                 exp = sbi->ll_md_exp;
2244         else if (type & LL_STATFS_LOV)
2245                 exp = sbi->ll_dt_exp;
2246         else
2247                 GOTO(out_statfs, rc = -ENODEV);
2248
2249         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2250         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2251         if (rc)
2252                 GOTO(out_statfs, rc);
2253 out_statfs:
2254         if (buf)
2255                 obd_ioctl_freedata(buf, len);
2256         return rc;
2257 }
2258
2259 int ll_process_config(struct lustre_cfg *lcfg)
2260 {
2261         char *ptr;
2262         void *sb;
2263         struct lprocfs_static_vars lvars;
2264         unsigned long x;
2265         int rc = 0;
2266
2267         lprocfs_llite_init_vars(&lvars);
2268
2269         /* The instance name contains the sb: lustre-client-aacfe000 */
2270         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2271         if (!ptr || !*(++ptr))
2272                 return -EINVAL;
2273         if (sscanf(ptr, "%lx", &x) != 1)
2274                 return -EINVAL;
2275         sb = (void *)x;
2276         /* This better be a real Lustre superblock! */
2277         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2278
2279         /* Note we have not called client_common_fill_super yet, so
2280            proc fns must be able to handle that! */
2281         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2282                                       lcfg, sb);
2283         if (rc > 0)
2284                 rc = 0;
2285         return(rc);
2286 }
2287
2288 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2289 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2290                                        struct inode *i1, struct inode *i2,
2291                                        const char *name, int namelen,
2292                                        int mode, __u32 opc, void *data)
2293 {
2294         LASSERT(i1 != NULL);
2295
2296         if (namelen > ll_i2sbi(i1)->ll_namelen)
2297                 return ERR_PTR(-ENAMETOOLONG);
2298
2299         if (op_data == NULL)
2300                 OBD_ALLOC_PTR(op_data);
2301
2302         if (op_data == NULL)
2303                 return ERR_PTR(-ENOMEM);
2304
2305         ll_i2gids(op_data->op_suppgids, i1, i2);
2306         op_data->op_fid1 = *ll_inode2fid(i1);
2307         op_data->op_capa1 = ll_mdscapa_get(i1);
2308
2309         if (i2) {
2310                 op_data->op_fid2 = *ll_inode2fid(i2);
2311                 op_data->op_capa2 = ll_mdscapa_get(i2);
2312         } else {
2313                 fid_zero(&op_data->op_fid2);
2314                 op_data->op_capa2 = NULL;
2315         }
2316
2317         op_data->op_name = name;
2318         op_data->op_namelen = namelen;
2319         op_data->op_mode = mode;
2320         op_data->op_mod_time = cfs_time_current_sec();
2321         op_data->op_fsuid = cfs_curproc_fsuid();
2322         op_data->op_fsgid = cfs_curproc_fsgid();
2323         op_data->op_cap = cfs_curproc_cap_pack();
2324         op_data->op_bias = 0;
2325         op_data->op_cli_flags = 0;
2326         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2327              filename_is_volatile(name, namelen, NULL))
2328                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2329         op_data->op_opc = opc;
2330         op_data->op_mds = 0;
2331         op_data->op_data = data;
2332
2333         /* If the file is being opened after mknod() (normally due to NFS)
2334          * try to use the default stripe data from parent directory for
2335          * allocating OST objects.  Try to pass the parent FID to MDS. */
2336         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2337             !ll_i2info(i2)->lli_has_smd) {
2338                 struct ll_inode_info *lli = ll_i2info(i2);
2339
2340                 spin_lock(&lli->lli_lock);
2341                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2342                         op_data->op_fid1 = lli->lli_pfid;
2343                 spin_unlock(&lli->lli_lock);
2344                 /** We ignore parent's capability temporary. */
2345         }
2346
2347         /* When called by ll_setattr_raw, file is i1. */
2348         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2349                 op_data->op_bias |= MDS_DATA_MODIFIED;
2350
2351         return op_data;
2352 }
2353
2354 void ll_finish_md_op_data(struct md_op_data *op_data)
2355 {
2356         capa_put(op_data->op_capa1);
2357         capa_put(op_data->op_capa2);
2358         OBD_FREE_PTR(op_data);
2359 }
2360
2361 #ifdef HAVE_SUPEROPS_USE_DENTRY
2362 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2363 #else
2364 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2365 #endif
2366 {
2367         struct ll_sb_info *sbi;
2368
2369 #ifdef HAVE_SUPEROPS_USE_DENTRY
2370         LASSERT((seq != NULL) && (dentry != NULL));
2371         sbi = ll_s2sbi(dentry->d_sb);
2372 #else
2373         LASSERT((seq != NULL) && (vfs != NULL));
2374         sbi = ll_s2sbi(vfs->mnt_sb);
2375 #endif
2376
2377         if (sbi->ll_flags & LL_SBI_NOLCK)
2378                 seq_puts(seq, ",nolock");
2379
2380         if (sbi->ll_flags & LL_SBI_FLOCK)
2381                 seq_puts(seq, ",flock");
2382
2383         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2384                 seq_puts(seq, ",localflock");
2385
2386         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2387                 seq_puts(seq, ",user_xattr");
2388
2389         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2390                 seq_puts(seq, ",lazystatfs");
2391
2392         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2393                 seq_puts(seq, ",user_fid2path");
2394
2395         RETURN(0);
2396 }
2397
2398 /**
2399  * Get obd name by cmd, and copy out to user space
2400  */
2401 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2402 {
2403         struct ll_sb_info *sbi = ll_i2sbi(inode);
2404         struct obd_device *obd;
2405         ENTRY;
2406
2407         if (cmd == OBD_IOC_GETDTNAME)
2408                 obd = class_exp2obd(sbi->ll_dt_exp);
2409         else if (cmd == OBD_IOC_GETMDNAME)
2410                 obd = class_exp2obd(sbi->ll_md_exp);
2411         else
2412                 RETURN(-EINVAL);
2413
2414         if (!obd)
2415                 RETURN(-ENOENT);
2416
2417         if (copy_to_user((void *)arg, obd->obd_name,
2418                          strlen(obd->obd_name) + 1))
2419                 RETURN(-EFAULT);
2420
2421         RETURN(0);
2422 }
2423
2424 /**
2425  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2426  * fsname will be returned in this buffer; otherwise, a static buffer will be
2427  * used to store the fsname and returned to caller.
2428  */
2429 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2430 {
2431         static char fsname_static[MTI_NAME_MAXLEN];
2432         struct lustre_sb_info *lsi = s2lsi(sb);
2433         char *ptr;
2434         int len;
2435
2436         if (buf == NULL) {
2437                 /* this means the caller wants to use static buffer
2438                  * and it doesn't care about race. Usually this is
2439                  * in error reporting path */
2440                 buf = fsname_static;
2441                 buflen = sizeof(fsname_static);
2442         }
2443
2444         len = strlen(lsi->lsi_lmd->lmd_profile);
2445         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2446         if (ptr && (strcmp(ptr, "-client") == 0))
2447                 len -= 7;
2448
2449         if (unlikely(len >= buflen))
2450                 len = buflen - 1;
2451         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2452         buf[len] = '\0';
2453
2454         return buf;
2455 }
2456
2457 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2458 {
2459         char *path = NULL;
2460
2461 #ifdef HAVE_FS_STRUCT_USE_PATH
2462         struct path p;
2463
2464         p.dentry = dentry;
2465         p.mnt = current->fs->root.mnt;
2466         path_get(&p);
2467         path = d_path(&p, buf, bufsize);
2468         path_put(&p);
2469 #else
2470         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2471 #endif
2472
2473         return path;
2474 }
2475
2476 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2477 {
2478         char *buf, *path = NULL;
2479         struct dentry *dentry = NULL;
2480         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2481
2482         /* this can be called inside spin lock so use GFP_ATOMIC. */
2483         buf = (char *)__get_free_page(GFP_ATOMIC);
2484         if (buf != NULL) {
2485                 dentry = d_find_alias(page->mapping->host);
2486                 if (dentry != NULL)
2487                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2488         }
2489
2490         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2491               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2492               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2493               PFID(&obj->cob_header.coh_lu.loh_fid),
2494               (path && !IS_ERR(path)) ? path : "", ioret);
2495
2496         if (dentry != NULL)
2497                 dput(dentry);
2498
2499         if (buf != NULL)
2500                 free_page((unsigned long)buf);
2501 }