lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/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 cfs_mem_cache_t *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 - CFS_PAGE_SHIFT) < 512) {
  97 #ifdef HAVE_BGL_SUPPORT
  98                 lru_page_max = pages / 4;
  99 #else
 100                 lru_page_max = pages / 2;
 101 #endif
 102         } else {
 103                 lru_page_max = (pages / 4) * 3;
 104         }
 105
 106         /* initialize lru data */
 107         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 108         sbi->ll_cache.ccc_lru_max = lru_page_max;
 109         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 110         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 111         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 112
 113         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 114                                            SBI_DEFAULT_READAHEAD_MAX);
 115         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 116         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 117                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 118         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 119         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 120
 121         ll_generate_random_uuid(uuid);
 122         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 123         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 124
 125         spin_lock(&ll_sb_lock);
 126         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 127         spin_unlock(&ll_sb_lock);
 128
 129         sbi->ll_flags |= LL_SBI_VERBOSE;
 130 #ifdef ENABLE_CHECKSUM
 131         sbi->ll_flags |= LL_SBI_CHECKSUM;
 132 #endif
 133
 134 #ifdef HAVE_LRU_RESIZE_SUPPORT
 135         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 136 #endif
 137
 138         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 139                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 140                                pp_r_hist.oh_lock);
 141                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 142                                pp_w_hist.oh_lock);
 143         }
 144
 145         /* metadata statahead is enabled by default */
 146         sbi->ll_sa_max = LL_SA_RPC_DEF;
 147         cfs_atomic_set(&sbi->ll_sa_total, 0);
 148         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 149         cfs_atomic_set(&sbi->ll_agl_total, 0);
 150         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 151
 152         RETURN(sbi);
 153 }
 154
 155 void ll_free_sbi(struct super_block *sb)
 156 {
 157         struct ll_sb_info *sbi = ll_s2sbi(sb);
 158         ENTRY;
 159
 160         if (sbi != NULL) {
 161                 spin_lock(&ll_sb_lock);
 162                 cfs_list_del(&sbi->ll_list);
 163                 spin_unlock(&ll_sb_lock);
 164                 OBD_FREE(sbi, sizeof(*sbi));
 165         }
 166         EXIT;
 167 }
 168
 169 static struct dentry_operations ll_d_root_ops = {
 170         .d_compare = ll_dcompare,
 171         .d_revalidate = ll_revalidate_nd,
 172 };
 173
 174 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 175                                     struct vfsmount *mnt)
 176 {
 177         struct inode *root = 0;
 178         struct ll_sb_info *sbi = ll_s2sbi(sb);
 179         struct obd_device *obd;
 180         struct obd_capa *oc = NULL;
 181         struct obd_statfs *osfs = NULL;
 182         struct ptlrpc_request *request = NULL;
 183         struct obd_connect_data *data = NULL;
 184         struct obd_uuid *uuid;
 185         struct md_op_data *op_data;
 186         struct lustre_md lmd;
 187         obd_valid valid;
 188         int size, err, checksum;
 189         ENTRY;
 190
 191         obd = class_name2obd(md);
 192         if (!obd) {
 193                 CERROR("MD %s: not setup or attached\n", md);
 194                 RETURN(-EINVAL);
 195         }
 196
 197         OBD_ALLOC_PTR(data);
 198         if (data == NULL)
 199                 RETURN(-ENOMEM);
 200
 201         OBD_ALLOC_PTR(osfs);
 202         if (osfs == NULL) {
 203                 OBD_FREE_PTR(data);
 204                 RETURN(-ENOMEM);
 205         }
 206
 207         if (proc_lustre_fs_root) {
 208                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 209                                                   dt, md);
 210                 if (err < 0)
 211                         CERROR("could not register mount in /proc/fs/lustre\n");
 212         }
 213
 214         /* indicate the features supported by this client */
 215         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 216                                   OBD_CONNECT_ATTRFID  |
 217                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 218                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 219                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 220                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 221                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 222                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 223                                   OBD_CONNECT_EINPROGRESS |
 224                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 225                                   OBD_CONNECT_LAYOUTLOCK;
 226
 227         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 228                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 229
 230 #ifdef HAVE_LRU_RESIZE_SUPPORT
 231         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 232                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 233 #endif
 234 #ifdef CONFIG_FS_POSIX_ACL
 235         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 236 #endif
 237
 238         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 239                 /* flag mdc connection as lightweight, only used for test
 240                  * purpose, use with care */
 241                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 242
 243         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 244         data->ocd_version = LUSTRE_VERSION_CODE;
 245
 246         if (sb->s_flags & MS_RDONLY)
 247                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 248         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 249                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 250
 251 #ifdef HAVE_MS_FLOCK_LOCK
 252         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 253         sb->s_flags |= MS_FLOCK_LOCK;
 254 #endif
 255 #ifdef MS_HAS_NEW_AOPS
 256         sb->s_flags |= MS_HAS_NEW_AOPS;
 257 #endif
 258
 259         if (sbi->ll_flags & LL_SBI_FLOCK)
 260                 sbi->ll_fop = &ll_file_operations_flock;
 261         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 262                 sbi->ll_fop = &ll_file_operations;
 263         else
 264                 sbi->ll_fop = &ll_file_operations_noflock;
 265
 266         /* real client */
 267         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 268         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 269                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 270
 271         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 272
 273         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 274         if (err == -EBUSY) {
 275                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 276                                    "recovery, of which this client is not a "
 277                                    "part. Please wait for recovery to complete,"
 278                                    " abort, or time out.\n", md);
 279                 GOTO(out, err);
 280         } else if (err) {
 281                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 282                 GOTO(out, err);
 283         }
 284
 285         /* For mount, we only need fs info from MDT0, and also in DNE, it
 286          * can make sure the client can be mounted as long as MDT0 is
 287          * avaible */
 288         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 289                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 290                         OBD_STATFS_FOR_MDT0);
 291         if (err)
 292                 GOTO(out_md, err);
 293
 294         /* This needs to be after statfs to ensure connect has finished.
 295          * Note that "data" does NOT contain the valid connect reply.
 296          * If connecting to a 1.8 server there will be no LMV device, so
 297          * we can access the MDC export directly and exp_connect_flags will
 298          * be non-zero, but if accessing an upgraded 2.1 server it will
 299          * have the correct flags filled in.
 300          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 301         valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
 302         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
 303             valid != CLIENT_CONNECT_MDT_REQD) {
 304                 char *buf;
 305
 306                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 307                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
 308                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 309                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 310                                    "feature(s) needed for correct operation "
 311                                    "of this client (%s). Please upgrade "
 312                                    "server or downgrade client.\n",
 313                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 314                 OBD_FREE(buf, CFS_PAGE_SIZE);
 315                 GOTO(out_md, err = -EPROTO);
 316         }
 317
 318         size = sizeof(*data);
 319         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 320                            KEY_CONN_DATA,  &size, data, NULL);
 321         if (err) {
 322                 CERROR("%s: Get connect data failed: rc = %d\n",
 323                        sbi->ll_md_exp->exp_obd->obd_name, err);
 324                 GOTO(out_md, err);
 325         }
 326
 327         LASSERT(osfs->os_bsize);
 328         sb->s_blocksize = osfs->os_bsize;
 329         sb->s_blocksize_bits = log2(osfs->os_bsize);
 330         sb->s_magic = LL_SUPER_MAGIC;
 331         sb->s_maxbytes = MAX_LFS_FILESIZE;
 332         sbi->ll_namelen = osfs->os_namelen;
 333         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 334
 335         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 336             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 337                 LCONSOLE_INFO("Disabling user_xattr feature because "
 338                               "it is not supported on the server\n");
 339                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 340         }
 341
 342         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 343 #ifdef MS_POSIXACL
 344                 sb->s_flags |= MS_POSIXACL;
 345 #endif
 346                 sbi->ll_flags |= LL_SBI_ACL;
 347         } else {
 348                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 349 #ifdef MS_POSIXACL
 350                 sb->s_flags &= ~MS_POSIXACL;
 351 #endif
 352                 sbi->ll_flags &= ~LL_SBI_ACL;
 353         }
 354
 355         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 356                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 357                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 358                         LCONSOLE_INFO("client is set as remote by default.\n");
 359                 }
 360         } else {
 361                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 362                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 363                         LCONSOLE_INFO("client claims to be remote, but server "
 364                                       "rejected, forced to be local.\n");
 365                 }
 366         }
 367
 368         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 369                 LCONSOLE_INFO("client enabled MDS capability!\n");
 370                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 371         }
 372
 373         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 374                 LCONSOLE_INFO("client enabled OSS capability!\n");
 375                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 376         }
 377
 378         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 379                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 380
 381         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 382                 sbi->ll_md_brw_size = data->ocd_brw_size;
 383         else
 384                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
 385
 386         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 387                 LCONSOLE_INFO("Layout lock feature supported.\n");
 388                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 389         }
 390
 391         obd = class_name2obd(dt);
 392         if (!obd) {
 393                 CERROR("DT %s: not setup or attached\n", dt);
 394                 GOTO(out_md, err = -ENODEV);
 395         }
 396
 397         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 398                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 399                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 400                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 401                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 402                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 403                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 404                                   OBD_CONNECT_MAXBYTES |
 405                                   OBD_CONNECT_EINPROGRESS |
 406                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 407                                   OBD_CONNECT_LAYOUTLOCK;
 408
 409         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 410                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 411
 412         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 413                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 414                  * disabled by default, because it can still be enabled on the
 415                  * fly via /proc. As a consequence, we still need to come to an
 416                  * agreement on the supported algorithms at connect time */
 417                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 418
 419                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 420                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 421                 else
 422                         data->ocd_cksum_types = cksum_types_supported_client();
 423         }
 424
 425 #ifdef HAVE_LRU_RESIZE_SUPPORT
 426         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 427 #endif
 428         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 429                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 430
 431         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 432                "ocd_grant: %d\n", data->ocd_connect_flags,
 433                data->ocd_version, data->ocd_grant);
 434
 435         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 436         obd->obd_upcall.onu_upcall = cl_ocd_update;
 437
 438         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 439
 440         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 441                           NULL);
 442         if (err == -EBUSY) {
 443                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 444                                    "recovery, of which this client is not a "
 445                                    "part.  Please wait for recovery to "
 446                                    "complete, abort, or time out.\n", dt);
 447                 GOTO(out_md, err);
 448         } else if (err) {
 449                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 450                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 451                 GOTO(out_md, err);
 452         }
 453
 454         mutex_lock(&sbi->ll_lco.lco_lock);
 455         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 456         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 457         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 458         mutex_unlock(&sbi->ll_lco.lco_lock);
 459
 460         fid_zero(&sbi->ll_root_fid);
 461         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 462         if (err) {
 463                 CERROR("cannot mds_connect: rc = %d\n", err);
 464                 GOTO(out_dt, err);
 465         }
 466         if (!fid_is_sane(&sbi->ll_root_fid)) {
 467                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 468                        sbi->ll_md_exp->exp_obd->obd_name,
 469                        PFID(&sbi->ll_root_fid));
 470                 GOTO(out_dt, err = -EINVAL);
 471         }
 472         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 473
 474         sb->s_op = &lustre_super_operations;
 475 #if THREAD_SIZE >= 8192 /*b=17630*/
 476         sb->s_export_op = &lustre_export_operations;
 477 #endif
 478
 479         /* make root inode
 480          * XXX: move this to after cbd setup? */
 481         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 482         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 483                 valid |= OBD_MD_FLRMTPERM;
 484         else if (sbi->ll_flags & LL_SBI_ACL)
 485                 valid |= OBD_MD_FLACL;
 486
 487         OBD_ALLOC_PTR(op_data);
 488         if (op_data == NULL)
 489                 GOTO(out_dt, err = -ENOMEM);
 490
 491         op_data->op_fid1 = sbi->ll_root_fid;
 492         op_data->op_mode = 0;
 493         op_data->op_capa1 = oc;
 494         op_data->op_valid = valid;
 495
 496         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 497         if (oc)
 498                 capa_put(oc);
 499         OBD_FREE_PTR(op_data);
 500         if (err) {
 501                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 502                        sbi->ll_md_exp->exp_obd->obd_name, err);
 503                 GOTO(out_dt, err);
 504         }
 505
 506         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 507                                sbi->ll_md_exp, &lmd);
 508         if (err) {
 509                 CERROR("failed to understand root inode md: rc = %d\n", err);
 510                 ptlrpc_req_finished(request);
 511                 GOTO(out_dt, err);
 512         }
 513
 514         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 515         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
 516         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 517         ptlrpc_req_finished(request);
 518
 519         if (root == NULL || IS_ERR(root)) {
 520                 if (lmd.lsm)
 521                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 522 #ifdef CONFIG_FS_POSIX_ACL
 523                 if (lmd.posix_acl) {
 524                         posix_acl_release(lmd.posix_acl);
 525                         lmd.posix_acl = NULL;
 526                 }
 527 #endif
 528                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 529                 root = NULL;
 530                 CERROR("lustre_lite: bad iget4 for root\n");
 531                 GOTO(out_root, err);
 532         }
 533
 534         err = ll_close_thread_start(&sbi->ll_lcq);
 535         if (err) {
 536                 CERROR("cannot start close thread: rc %d\n", err);
 537                 GOTO(out_root, err);
 538         }
 539
 540 #ifdef CONFIG_FS_POSIX_ACL
 541         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 542                 rct_init(&sbi->ll_rct);
 543                 et_init(&sbi->ll_et);
 544         }
 545 #endif
 546
 547         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 548         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 549                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 550                                  NULL);
 551         cl_sb_init(sb);
 552
 553         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 554                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 555                                  &sbi->ll_cache, NULL);
 556
 557         sb->s_root = d_make_root(root);
 558         if (sb->s_root == NULL) {
 559                 CERROR("%s: can't make root dentry\n",
 560                         ll_get_fsname(sb, NULL, 0));
 561                 GOTO(out_root, err = -ENOMEM);
 562         }
 563
 564 #ifdef HAVE_DCACHE_LOCK
 565         sb->s_root->d_op = &ll_d_root_ops;
 566 #else
 567         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 568         d_set_d_op(sb->s_root, &ll_d_root_ops);
 569         sb->s_d_op = &ll_d_ops;
 570 #endif
 571
 572         sbi->ll_sdev_orig = sb->s_dev;
 573
 574         /* We set sb->s_dev equal on all lustre clients in order to support
 575          * NFS export clustering.  NFSD requires that the FSID be the same
 576          * on all clients. */
 577         /* s_dev is also used in lt_compare() to compare two fs, but that is
 578          * only a node-local comparison. */
 579         uuid = obd_get_uuid(sbi->ll_md_exp);
 580         if (uuid != NULL)
 581                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 582
 583         if (data != NULL)
 584                 OBD_FREE_PTR(data);
 585         if (osfs != NULL)
 586                 OBD_FREE_PTR(osfs);
 587
 588         RETURN(err);
 589 out_root:
 590         if (root)
 591                 iput(root);
 592 out_dt:
 593         obd_disconnect(sbi->ll_dt_exp);
 594         sbi->ll_dt_exp = NULL;
 595         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 596         obd_zombie_barrier();
 597 out_md:
 598         obd_disconnect(sbi->ll_md_exp);
 599         sbi->ll_md_exp = NULL;
 600 out:
 601         if (data != NULL)
 602                 OBD_FREE_PTR(data);
 603         if (osfs != NULL)
 604                 OBD_FREE_PTR(osfs);
 605         lprocfs_unregister_mountpoint(sbi);
 606         return err;
 607 }
 608
 609 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 610 {
 611         int size, rc;
 612
 613         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 614         size = sizeof(int);
 615         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 616                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 617         if (rc)
 618                 CERROR("Get max mdsize error rc %d \n", rc);
 619
 620         RETURN(rc);
 621 }
 622
 623 void ll_dump_inode(struct inode *inode)
 624 {
 625         struct ll_d_hlist_node *tmp;
 626         int dentry_count = 0;
 627
 628         LASSERT(inode != NULL);
 629
 630         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 631                 dentry_count++;
 632
 633         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 634                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 635                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 636 }
 637
 638 void lustre_dump_dentry(struct dentry *dentry, int recur)
 639 {
 640         struct list_head *tmp;
 641         int subdirs = 0;
 642
 643         LASSERT(dentry != NULL);
 644
 645         list_for_each(tmp, &dentry->d_subdirs)
 646                 subdirs++;
 647
 648         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 649                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 650                dentry->d_name.len, dentry->d_name.name,
 651                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 652                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 653                dentry->d_flags, dentry->d_fsdata, subdirs);
 654         if (dentry->d_inode != NULL)
 655                 ll_dump_inode(dentry->d_inode);
 656
 657         if (recur == 0)
 658                 return;
 659
 660         list_for_each(tmp, &dentry->d_subdirs) {
 661                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 662                 lustre_dump_dentry(d, recur - 1);
 663         }
 664 }
 665
 666 void client_common_put_super(struct super_block *sb)
 667 {
 668         struct ll_sb_info *sbi = ll_s2sbi(sb);
 669         ENTRY;
 670
 671 #ifdef CONFIG_FS_POSIX_ACL
 672         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 673                 et_fini(&sbi->ll_et);
 674                 rct_fini(&sbi->ll_rct);
 675         }
 676 #endif
 677
 678         ll_close_thread_shutdown(sbi->ll_lcq);
 679
 680         cl_sb_fini(sb);
 681
 682         cfs_list_del(&sbi->ll_conn_chain);
 683
 684         obd_disconnect(sbi->ll_dt_exp);
 685         sbi->ll_dt_exp = NULL;
 686         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 687          * see LU-2543. */
 688         obd_zombie_barrier();
 689
 690         lprocfs_unregister_mountpoint(sbi);
 691
 692         obd_disconnect(sbi->ll_md_exp);
 693         sbi->ll_md_exp = NULL;
 694
 695         EXIT;
 696 }
 697
 698 void ll_kill_super(struct super_block *sb)
 699 {
 700         struct ll_sb_info *sbi;
 701
 702         ENTRY;
 703
 704         /* not init sb ?*/
 705         if (!(sb->s_flags & MS_ACTIVE))
 706                 return;
 707
 708         sbi = ll_s2sbi(sb);
 709         /* we need restore s_dev from changed for clustred NFS before put_super
 710          * because new kernels have cached s_dev and change sb->s_dev in
 711          * put_super not affected real removing devices */
 712         if (sbi)
 713                 sb->s_dev = sbi->ll_sdev_orig;
 714         EXIT;
 715 }
 716
 717 char *ll_read_opt(const char *opt, char *data)
 718 {
 719         char *value;
 720         char *retval;
 721         ENTRY;
 722
 723         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 724         if (strncmp(opt, data, strlen(opt)))
 725                 RETURN(NULL);
 726         if ((value = strchr(data, '=')) == NULL)
 727                 RETURN(NULL);
 728
 729         value++;
 730         OBD_ALLOC(retval, strlen(value) + 1);
 731         if (!retval) {
 732                 CERROR("out of memory!\n");
 733                 RETURN(NULL);
 734         }
 735
 736         memcpy(retval, value, strlen(value)+1);
 737         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 738         RETURN(retval);
 739 }
 740
 741 static inline int ll_set_opt(const char *opt, char *data, int fl)
 742 {
 743         if (strncmp(opt, data, strlen(opt)) != 0)
 744                 return(0);
 745         else
 746                 return(fl);
 747 }
 748
 749 /* non-client-specific mount options are parsed in lmd_parse */
 750 static int ll_options(char *options, int *flags)
 751 {
 752         int tmp;
 753         char *s1 = options, *s2;
 754         ENTRY;
 755
 756         if (!options)
 757                 RETURN(0);
 758
 759         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 760
 761         while (*s1) {
 762                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 763                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 764                 if (tmp) {
 765                         *flags |= tmp;
 766                         goto next;
 767                 }
 768                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 769                 if (tmp) {
 770                         *flags |= tmp;
 771                         goto next;
 772                 }
 773                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 774                 if (tmp) {
 775                         *flags |= tmp;
 776                         goto next;
 777                 }
 778                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 779                 if (tmp) {
 780                         *flags &= ~tmp;
 781                         goto next;
 782                 }
 783                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 784                 if (tmp) {
 785                         *flags |= tmp;
 786                         goto next;
 787                 }
 788                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 789                 if (tmp) {
 790                         *flags &= ~tmp;
 791                         goto next;
 792                 }
 793 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 794                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 795                 if (tmp) {
 796                         /* Ignore deprecated mount option.  The client will
 797                          * always try to mount with ACL support, whether this
 798                          * is used depends on whether server supports it. */
 799                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 800                                                   "mount option 'acl'.\n");
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 804                 if (tmp) {
 805                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 806                                                   "mount option 'noacl'.\n");
 807                         goto next;
 808                 }
 809 #else
 810 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 811 #endif
 812                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 813                 if (tmp) {
 814                         *flags |= tmp;
 815                         goto next;
 816                 }
 817                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 818                 if (tmp) {
 819                         *flags |= tmp;
 820                         goto next;
 821                 }
 822                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 823                 if (tmp) {
 824                         *flags &= ~tmp;
 825                         goto next;
 826                 }
 827
 828                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 829                 if (tmp) {
 830                         *flags |= tmp;
 831                         goto next;
 832                 }
 833                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 834                 if (tmp) {
 835                         *flags &= ~tmp;
 836                         goto next;
 837                 }
 838                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 839                 if (tmp) {
 840                         *flags |= tmp;
 841                         goto next;
 842                 }
 843                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 844                 if (tmp) {
 845                         *flags &= ~tmp;
 846                         goto next;
 847                 }
 848                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 849                 if (tmp) {
 850                         *flags |= tmp;
 851                         goto next;
 852                 }
 853                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 854                 if (tmp) {
 855                         *flags &= ~tmp;
 856                         goto next;
 857                 }
 858                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 859                 if (tmp) {
 860                         *flags |= tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 864                 if (tmp) {
 865                         *flags |= tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 869                 if (tmp) {
 870                         *flags |= tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 874                 if (tmp) {
 875                         *flags &= ~tmp;
 876                         goto next;
 877                 }
 878                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 879                                    s1);
 880                 RETURN(-EINVAL);
 881
 882 next:
 883                 /* Find next opt */
 884                 s2 = strchr(s1, ',');
 885                 if (s2 == NULL)
 886                         break;
 887                 s1 = s2 + 1;
 888         }
 889         RETURN(0);
 890 }
 891
 892 void ll_lli_init(struct ll_inode_info *lli)
 893 {
 894         lli->lli_inode_magic = LLI_INODE_MAGIC;
 895         lli->lli_flags = 0;
 896         lli->lli_ioepoch = 0;
 897         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 898         spin_lock_init(&lli->lli_lock);
 899         lli->lli_posix_acl = NULL;
 900         lli->lli_remote_perms = NULL;
 901         mutex_init(&lli->lli_rmtperm_mutex);
 902         /* Do not set lli_fid, it has been initialized already. */
 903         fid_zero(&lli->lli_pfid);
 904         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 905         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 906         cfs_atomic_set(&lli->lli_open_count, 0);
 907         lli->lli_mds_capa = NULL;
 908         lli->lli_rmtperm_time = 0;
 909         lli->lli_pending_och = NULL;
 910         lli->lli_mds_read_och = NULL;
 911         lli->lli_mds_write_och = NULL;
 912         lli->lli_mds_exec_och = NULL;
 913         lli->lli_open_fd_read_count = 0;
 914         lli->lli_open_fd_write_count = 0;
 915         lli->lli_open_fd_exec_count = 0;
 916         mutex_init(&lli->lli_och_mutex);
 917         spin_lock_init(&lli->lli_agl_lock);
 918         lli->lli_has_smd = false;
 919         lli->lli_layout_gen = LL_LAYOUT_GEN_ZERO;
 920         lli->lli_clob = NULL;
 921
 922         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 923         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 924                 mutex_init(&lli->lli_readdir_mutex);
 925                 lli->lli_opendir_key = NULL;
 926                 lli->lli_sai = NULL;
 927                 lli->lli_def_acl = NULL;
 928                 spin_lock_init(&lli->lli_sa_lock);
 929                 lli->lli_opendir_pid = 0;
 930         } else {
 931                 sema_init(&lli->lli_size_sem, 1);
 932                 lli->lli_size_sem_owner = NULL;
 933                 lli->lli_symlink_name = NULL;
 934                 init_rwsem(&lli->lli_trunc_sem);
 935                 mutex_init(&lli->lli_write_mutex);
 936                 init_rwsem(&lli->lli_glimpse_sem);
 937                 lli->lli_glimpse_time = 0;
 938                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 939                 lli->lli_agl_index = 0;
 940                 lli->lli_async_rc = 0;
 941         }
 942         mutex_init(&lli->lli_layout_mutex);
 943 }
 944
 945 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 946 {
 947 #ifdef HAVE_BDI_REGISTER
 948         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 949
 950 #ifdef HAVE_BDI_NAME
 951         bdi->name = "lustre";
 952 #endif
 953         return bdi_register(bdi, NULL, "lustre-%d",
 954                             atomic_inc_return(&ll_bdi_num));
 955 #else
 956         return 0;
 957 #endif
 958 }
 959
 960 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 961 {
 962         struct lustre_profile *lprof = NULL;
 963         struct lustre_sb_info *lsi = s2lsi(sb);
 964         struct ll_sb_info *sbi;
 965         char  *dt = NULL, *md = NULL;
 966         char  *profilenm = get_profile_name(sb);
 967         struct config_llog_instance *cfg;
 968         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 969         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 970         int    err;
 971         ENTRY;
 972
 973         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 974
 975         OBD_ALLOC_PTR(cfg);
 976         if (cfg == NULL)
 977                 RETURN(-ENOMEM);
 978
 979         cfs_module_get();
 980
 981         /* client additional sb info */
 982         lsi->lsi_llsbi = sbi = ll_init_sbi();
 983         if (!sbi) {
 984                 cfs_module_put(THIS_MODULE);
 985                 OBD_FREE_PTR(cfg);
 986                 RETURN(-ENOMEM);
 987         }
 988
 989         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 990         if (err)
 991                 GOTO(out_free, err);
 992
 993         err = bdi_init(&lsi->lsi_bdi);
 994         if (err)
 995                 GOTO(out_free, err);
 996         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 997         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 998         err = ll_bdi_register(&lsi->lsi_bdi);
 999         if (err)
1000                 GOTO(out_free, err);
1001
1002 #ifdef HAVE_SB_BDI
1003         sb->s_bdi = &lsi->lsi_bdi;
1004 #endif
1005
1006         /* Generate a string unique to this super, in case some joker tries
1007            to mount the same fs at two mount points.
1008            Use the address of the super itself.*/
1009         cfg->cfg_instance = sb;
1010         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1011         cfg->cfg_callback = class_config_llog_handler;
1012         /* set up client obds */
1013         err = lustre_process_log(sb, profilenm, cfg);
1014         if (err < 0) {
1015                 CERROR("Unable to process log: %d\n", err);
1016                 GOTO(out_free, err);
1017         }
1018
1019         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1020         lprof = class_get_profile(profilenm);
1021         if (lprof == NULL) {
1022                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1023                                    " read from the MGS.  Does that filesystem "
1024                                    "exist?\n", profilenm);
1025                 GOTO(out_free, err = -EINVAL);
1026         }
1027         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1028                lprof->lp_md, lprof->lp_dt);
1029
1030         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1031         if (!dt)
1032                 GOTO(out_free, err = -ENOMEM);
1033         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1034
1035         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1036         if (!md)
1037                 GOTO(out_free, err = -ENOMEM);
1038         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1039
1040         /* connections, registrations, sb setup */
1041         err = client_common_fill_super(sb, md, dt, mnt);
1042
1043 out_free:
1044         if (md)
1045                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1046         if (dt)
1047                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1048         if (err)
1049                 ll_put_super(sb);
1050         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1051                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1052
1053         OBD_FREE_PTR(cfg);
1054         RETURN(err);
1055 } /* ll_fill_super */
1056
1057
1058 void lu_context_keys_dump(void);
1059
1060 void ll_put_super(struct super_block *sb)
1061 {
1062         struct config_llog_instance cfg;
1063         struct obd_device *obd;
1064         struct lustre_sb_info *lsi = s2lsi(sb);
1065         struct ll_sb_info *sbi = ll_s2sbi(sb);
1066         char *profilenm = get_profile_name(sb);
1067         int force = 1, next;
1068         ENTRY;
1069
1070         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1071
1072         ll_print_capa_stat(sbi);
1073
1074         cfg.cfg_instance = sb;
1075         lustre_end_log(sb, profilenm, &cfg);
1076
1077         if (sbi->ll_md_exp) {
1078                 obd = class_exp2obd(sbi->ll_md_exp);
1079                 if (obd)
1080                         force = obd->obd_force;
1081         }
1082
1083         /* We need to set force before the lov_disconnect in
1084            lustre_common_put_super, since l_d cleans up osc's as well. */
1085         if (force) {
1086                 next = 0;
1087                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1088                                                      &next)) != NULL) {
1089                         obd->obd_force = force;
1090                 }
1091         }
1092
1093         if (sbi->ll_lcq) {
1094                 /* Only if client_common_fill_super succeeded */
1095                 client_common_put_super(sb);
1096         }
1097
1098         next = 0;
1099         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1100                 class_manual_cleanup(obd);
1101         }
1102
1103         if (sbi->ll_flags & LL_SBI_VERBOSE)
1104                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1105
1106         if (profilenm)
1107                 class_del_profile(profilenm);
1108
1109         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1110                 bdi_destroy(&lsi->lsi_bdi);
1111                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1112         }
1113
1114         ll_free_sbi(sb);
1115         lsi->lsi_llsbi = NULL;
1116
1117         lustre_common_put_super(sb);
1118
1119         cl_env_cache_purge(~0);
1120
1121         cfs_module_put(THIS_MODULE);
1122
1123         EXIT;
1124 } /* client_put_super */
1125
1126 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1127 {
1128         struct inode *inode = NULL;
1129         /* NOTE: we depend on atomic igrab() -bzzz */
1130         lock_res_and_lock(lock);
1131         if (lock->l_ast_data) {
1132                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1133                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1134                         inode = igrab(lock->l_ast_data);
1135                 } else {
1136                         inode = lock->l_ast_data;
1137                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1138                                          D_WARNING, lock, "l_ast_data %p is "
1139                                          "bogus: magic %08x", lock->l_ast_data,
1140                                          lli->lli_inode_magic);
1141                         inode = NULL;
1142                 }
1143         }
1144         unlock_res_and_lock(lock);
1145         return inode;
1146 }
1147
1148 static int null_if_equal(struct ldlm_lock *lock, void *data)
1149 {
1150         if (data == lock->l_ast_data) {
1151                 lock->l_ast_data = NULL;
1152
1153                 if (lock->l_req_mode != lock->l_granted_mode)
1154                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1155         }
1156
1157         return LDLM_ITER_CONTINUE;
1158 }
1159
1160 void ll_clear_inode(struct inode *inode)
1161 {
1162         struct ll_inode_info *lli = ll_i2info(inode);
1163         struct ll_sb_info *sbi = ll_i2sbi(inode);
1164         ENTRY;
1165
1166         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1167                inode->i_generation, inode);
1168
1169         if (S_ISDIR(inode->i_mode)) {
1170                 /* these should have been cleared in ll_file_release */
1171                 LASSERT(lli->lli_opendir_key == NULL);
1172                 LASSERT(lli->lli_sai == NULL);
1173                 LASSERT(lli->lli_opendir_pid == 0);
1174         }
1175
1176         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1177         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1178                          null_if_equal, inode);
1179
1180         LASSERT(!lli->lli_open_fd_write_count);
1181         LASSERT(!lli->lli_open_fd_read_count);
1182         LASSERT(!lli->lli_open_fd_exec_count);
1183
1184         if (lli->lli_mds_write_och)
1185                 ll_md_real_close(inode, FMODE_WRITE);
1186         if (lli->lli_mds_exec_och)
1187                 ll_md_real_close(inode, FMODE_EXEC);
1188         if (lli->lli_mds_read_och)
1189                 ll_md_real_close(inode, FMODE_READ);
1190
1191         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1192                 OBD_FREE(lli->lli_symlink_name,
1193                          strlen(lli->lli_symlink_name) + 1);
1194                 lli->lli_symlink_name = NULL;
1195         }
1196
1197         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1198                 LASSERT(lli->lli_posix_acl == NULL);
1199                 if (lli->lli_remote_perms) {
1200                         free_rmtperm_hash(lli->lli_remote_perms);
1201                         lli->lli_remote_perms = NULL;
1202                 }
1203         }
1204 #ifdef CONFIG_FS_POSIX_ACL
1205         else if (lli->lli_posix_acl) {
1206                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1207                 LASSERT(lli->lli_remote_perms == NULL);
1208                 posix_acl_release(lli->lli_posix_acl);
1209                 lli->lli_posix_acl = NULL;
1210         }
1211 #endif
1212         lli->lli_inode_magic = LLI_INODE_DEAD;
1213
1214         ll_clear_inode_capas(inode);
1215         if (!S_ISDIR(inode->i_mode))
1216                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1217
1218         /*
1219          * XXX This has to be done before lsm is freed below, because
1220          * cl_object still uses inode lsm.
1221          */
1222         cl_inode_fini(inode);
1223         lli->lli_has_smd = false;
1224
1225         EXIT;
1226 }
1227
1228 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1229                   struct md_open_data **mod)
1230 {
1231         struct lustre_md md;
1232         struct inode *inode = dentry->d_inode;
1233         struct ll_sb_info *sbi = ll_i2sbi(inode);
1234         struct ptlrpc_request *request = NULL;
1235         int rc, ia_valid;
1236         ENTRY;
1237
1238         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1239                                      LUSTRE_OPC_ANY, NULL);
1240         if (IS_ERR(op_data))
1241                 RETURN(PTR_ERR(op_data));
1242
1243         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1244                         &request, mod);
1245         if (rc) {
1246                 ptlrpc_req_finished(request);
1247                 if (rc == -ENOENT) {
1248                         clear_nlink(inode);
1249                         /* Unlinked special device node? Or just a race?
1250                          * Pretend we done everything. */
1251                         if (!S_ISREG(inode->i_mode) &&
1252                             !S_ISDIR(inode->i_mode)) {
1253                                 ia_valid = op_data->op_attr.ia_valid;
1254                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1255                                 rc = simple_setattr(dentry, &op_data->op_attr);
1256                                 op_data->op_attr.ia_valid = ia_valid;
1257                         }
1258                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1259                         CERROR("md_setattr fails: rc = %d\n", rc);
1260                 }
1261                 RETURN(rc);
1262         }
1263
1264         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1265                               sbi->ll_md_exp, &md);
1266         if (rc) {
1267                 ptlrpc_req_finished(request);
1268                 RETURN(rc);
1269         }
1270
1271         /* We want to adjust timestamps.
1272          * If there is at least some data in file, we cleared ATTR_SIZE
1273          * to avoid update size, otherwise it is important to do.(SOM case)
1274          * (bug 6196) */
1275         ia_valid = op_data->op_attr.ia_valid;
1276         /* Since we set ATTR_*_SET flags above, and already done permission
1277          * check, So don't let inode_change_ok() check it again.  */
1278         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1279         rc = simple_setattr(dentry, &op_data->op_attr);
1280         op_data->op_attr.ia_valid = ia_valid;
1281
1282         /* Extract epoch data if obtained. */
1283         op_data->op_handle = md.body->handle;
1284         op_data->op_ioepoch = md.body->ioepoch;
1285
1286         ll_update_inode(inode, &md);
1287         ptlrpc_req_finished(request);
1288
1289         RETURN(rc);
1290 }
1291
1292 /* Close IO epoch and send Size-on-MDS attribute update. */
1293 static int ll_setattr_done_writing(struct inode *inode,
1294                                    struct md_op_data *op_data,
1295                                    struct md_open_data *mod)
1296 {
1297         struct ll_inode_info *lli = ll_i2info(inode);
1298         int rc = 0;
1299         ENTRY;
1300
1301         LASSERT(op_data != NULL);
1302         if (!S_ISREG(inode->i_mode))
1303                 RETURN(0);
1304
1305         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1306                op_data->op_ioepoch, PFID(&lli->lli_fid));
1307
1308         op_data->op_flags = MF_EPOCH_CLOSE;
1309         ll_done_writing_attr(inode, op_data);
1310         ll_pack_inode2opdata(inode, op_data, NULL);
1311
1312         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1313         if (rc == -EAGAIN) {
1314                 /* MDS has instructed us to obtain Size-on-MDS attribute
1315                  * from OSTs and send setattr to back to MDS. */
1316                 rc = ll_som_update(inode, op_data);
1317         } else if (rc) {
1318                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1319                        inode->i_ino, rc);
1320         }
1321         RETURN(rc);
1322 }
1323
1324 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1325 {
1326         struct obd_capa *capa;
1327         int rc;
1328
1329         if (attr->ia_valid & ATTR_SIZE)
1330                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1331         else
1332                 capa = ll_mdscapa_get(inode);
1333
1334         rc = cl_setattr_ost(inode, attr, capa);
1335
1336         if (attr->ia_valid & ATTR_SIZE)
1337                 ll_truncate_free_capa(capa);
1338         else
1339                 capa_put(capa);
1340
1341         return rc;
1342 }
1343
1344 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1345 /**
1346  * inode_newsize_ok - may this inode be truncated to a given size
1347  * @inode:      the inode to be truncated
1348  * @offset:     the new size to assign to the inode
1349  * @Returns:    0 on success, -ve errno on failure
1350  *
1351  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1352  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1353  * when necessary. Caller must not proceed with inode size change if failure is
1354  * returned. @inode must be a file (not directory), with appropriate
1355  * permissions to allow truncate (inode_newsize_ok does NOT check these
1356  * conditions).
1357  *
1358  * inode_newsize_ok must be called with i_mutex held.
1359  */
1360 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1361 {
1362         if (inode->i_size < offset) {
1363                 unsigned long limit;
1364
1365                 limit = rlimit(RLIMIT_FSIZE);
1366                 if (limit != RLIM_INFINITY && offset > limit)
1367                         goto out_sig;
1368                 if (offset > inode->i_sb->s_maxbytes)
1369                         goto out_big;
1370         } else {
1371                 /*
1372                  * truncation of in-use swapfiles is disallowed - it would
1373                  * cause subsequent swapout to scribble on the now-freed
1374                  * blocks.
1375                  */
1376                 if (IS_SWAPFILE(inode))
1377                         return -ETXTBSY;
1378         }
1379
1380         return 0;
1381 out_sig:
1382         send_sig(SIGXFSZ, current, 0);
1383 out_big:
1384         return -EFBIG;
1385 }
1386 #endif
1387
1388 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1389  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1390  * keep these values until such a time that objects are allocated for it.
1391  * We do the MDS operations first, as it is checking permissions for us.
1392  * We don't to the MDS RPC if there is nothing that we want to store there,
1393  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1394  * going to do an RPC anyways.
1395  *
1396  * If we are doing a truncate, we will send the mtime and ctime updates
1397  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1398  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1399  * at the same time.
1400  */
1401 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1402 {
1403         struct lov_stripe_md *lsm;
1404         struct inode *inode = dentry->d_inode;
1405         struct ll_inode_info *lli = ll_i2info(inode);
1406         struct md_op_data *op_data = NULL;
1407         struct md_open_data *mod = NULL;
1408         int ia_valid = attr->ia_valid;
1409         int rc = 0, rc1 = 0;
1410         ENTRY;
1411
1412         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1413                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1414                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1415                 attr->ia_valid);
1416
1417         if (ia_valid & ATTR_SIZE) {
1418                 /* Check new size against VFS/VM file size limit and rlimit */
1419                 rc = inode_newsize_ok(inode, attr->ia_size);
1420                 if (rc)
1421                         RETURN(rc);
1422
1423                 /* The maximum Lustre file size is variable, based on the
1424                  * OST maximum object size and number of stripes.  This
1425                  * needs another check in addition to the VFS check above. */
1426                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1427                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1428                                PFID(&lli->lli_fid), attr->ia_size,
1429                                ll_file_maxbytes(inode));
1430                         RETURN(-EFBIG);
1431                 }
1432
1433                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1434         }
1435
1436         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1437         if (ia_valid & TIMES_SET_FLAGS) {
1438                 if (cfs_curproc_fsuid() != inode->i_uid &&
1439                     !cfs_capable(CFS_CAP_FOWNER))
1440                         RETURN(-EPERM);
1441         }
1442
1443         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1444         if (attr->ia_valid & ATTR_CTIME) {
1445                 attr->ia_ctime = CFS_CURRENT_TIME;
1446                 attr->ia_valid |= ATTR_CTIME_SET;
1447         }
1448         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1449                 attr->ia_atime = CFS_CURRENT_TIME;
1450                 attr->ia_valid |= ATTR_ATIME_SET;
1451         }
1452         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1453                 attr->ia_mtime = CFS_CURRENT_TIME;
1454                 attr->ia_valid |= ATTR_MTIME_SET;
1455         }
1456
1457         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1458                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1459                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1460                        cfs_time_current_sec());
1461
1462         /* If we are changing file size, file content is modified, flag it. */
1463         if (attr->ia_valid & ATTR_SIZE) {
1464                 spin_lock(&lli->lli_lock);
1465                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1466                 spin_unlock(&lli->lli_lock);
1467         }
1468
1469         /* We always do an MDS RPC, even if we're only changing the size;
1470          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1471
1472         OBD_ALLOC_PTR(op_data);
1473         if (op_data == NULL)
1474                 RETURN(-ENOMEM);
1475
1476         if (!S_ISDIR(inode->i_mode)) {
1477                 if (ia_valid & ATTR_SIZE)
1478                         inode_dio_write_done(inode);
1479                 mutex_unlock(&inode->i_mutex);
1480                 down_write(&lli->lli_trunc_sem);
1481                 mutex_lock(&inode->i_mutex);
1482                 if (ia_valid & ATTR_SIZE)
1483                         inode_dio_wait(inode);
1484         }
1485
1486         /* We need a steady stripe configuration for setattr to avoid
1487          * confusion. */
1488         lsm = ccc_inode_lsm_get(inode);
1489
1490         /* NB: ATTR_SIZE will only be set after this point if the size
1491          * resides on the MDS, ie, this file has no objects. */
1492         if (lsm != NULL)
1493                 attr->ia_valid &= ~ATTR_SIZE;
1494         /* can't call ll_setattr_ost() while holding a refcount of lsm */
1495         ccc_inode_lsm_put(inode, lsm);
1496
1497         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1498
1499         /* Open epoch for truncate. */
1500         if (exp_connect_som(ll_i2mdexp(inode)) &&
1501             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1502                 op_data->op_flags = MF_EPOCH_OPEN;
1503
1504         rc = ll_md_setattr(dentry, op_data, &mod);
1505         if (rc)
1506                 GOTO(out, rc);
1507
1508         /* RPC to MDT is sent, cancel data modification flag */
1509         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1510                 spin_lock(&lli->lli_lock);
1511                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1512                 spin_unlock(&lli->lli_lock);
1513         }
1514
1515         ll_ioepoch_open(lli, op_data->op_ioepoch);
1516         if (!S_ISREG(inode->i_mode))
1517                 GOTO(out, rc = 0);
1518
1519         if (ia_valid & ATTR_SIZE)
1520                 attr->ia_valid |= ATTR_SIZE;
1521         if (ia_valid & (ATTR_SIZE |
1522                         ATTR_ATIME | ATTR_ATIME_SET |
1523                         ATTR_MTIME | ATTR_MTIME_SET))
1524                 /* For truncate and utimes sending attributes to OSTs, setting
1525                  * mtime/atime to the past will be performed under PW [0:EOF]
1526                  * extent lock (new_size:EOF for truncate).  It may seem
1527                  * excessive to send mtime/atime updates to OSTs when not
1528                  * setting times to past, but it is necessary due to possible
1529                  * time de-synchronization between MDT inode and OST objects */
1530                 rc = ll_setattr_ost(inode, attr);
1531         EXIT;
1532 out:
1533         if (op_data) {
1534                 if (op_data->op_ioepoch) {
1535                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1536                         if (!rc)
1537                                 rc = rc1;
1538                 }
1539                 ll_finish_md_op_data(op_data);
1540         }
1541         if (!S_ISDIR(inode->i_mode))
1542                 up_write(&lli->lli_trunc_sem);
1543
1544         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1545                            LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1546
1547         return rc;
1548 }
1549
1550 int ll_setattr(struct dentry *de, struct iattr *attr)
1551 {
1552         int mode = de->d_inode->i_mode;
1553
1554         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1555                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1556                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1557
1558         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1559                                (ATTR_SIZE|ATTR_MODE)) &&
1560             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1561              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1562               !(attr->ia_mode & S_ISGID))))
1563                 attr->ia_valid |= ATTR_FORCE;
1564
1565         if ((mode & S_ISUID) &&
1566             !(attr->ia_mode & S_ISUID) &&
1567             !(attr->ia_valid & ATTR_KILL_SUID))
1568                 attr->ia_valid |= ATTR_KILL_SUID;
1569
1570         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1571             !(attr->ia_mode & S_ISGID) &&
1572             !(attr->ia_valid & ATTR_KILL_SGID))
1573                 attr->ia_valid |= ATTR_KILL_SGID;
1574
1575         return ll_setattr_raw(de, attr);
1576 }
1577
1578 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1579                        __u64 max_age, __u32 flags)
1580 {
1581         struct ll_sb_info *sbi = ll_s2sbi(sb);
1582         struct obd_statfs obd_osfs;
1583         int rc;
1584         ENTRY;
1585
1586         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1587         if (rc) {
1588                 CERROR("md_statfs fails: rc = %d\n", rc);
1589                 RETURN(rc);
1590         }
1591
1592         osfs->os_type = sb->s_magic;
1593
1594         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1595                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1596
1597         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1598                 flags |= OBD_STATFS_NODELAY;
1599
1600         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1601         if (rc) {
1602                 CERROR("obd_statfs fails: rc = %d\n", rc);
1603                 RETURN(rc);
1604         }
1605
1606         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1607                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1608                obd_osfs.os_files);
1609
1610         osfs->os_bsize = obd_osfs.os_bsize;
1611         osfs->os_blocks = obd_osfs.os_blocks;
1612         osfs->os_bfree = obd_osfs.os_bfree;
1613         osfs->os_bavail = obd_osfs.os_bavail;
1614
1615         /* If we don't have as many objects free on the OST as inodes
1616          * on the MDS, we reduce the total number of inodes to
1617          * compensate, so that the "inodes in use" number is correct.
1618          */
1619         if (obd_osfs.os_ffree < osfs->os_ffree) {
1620                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1621                         obd_osfs.os_ffree;
1622                 osfs->os_ffree = obd_osfs.os_ffree;
1623         }
1624
1625         RETURN(rc);
1626 }
1627 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1628 {
1629         struct super_block *sb = de->d_sb;
1630         struct obd_statfs osfs;
1631         int rc;
1632
1633         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1634         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1635
1636         /* Some amount of caching on the client is allowed */
1637         rc = ll_statfs_internal(sb, &osfs,
1638                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1639                                 0);
1640         if (rc)
1641                 return rc;
1642
1643         statfs_unpack(sfs, &osfs);
1644
1645         /* We need to downshift for all 32-bit kernels, because we can't
1646          * tell if the kernel is being called via sys_statfs64() or not.
1647          * Stop before overflowing f_bsize - in which case it is better
1648          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1649         if (sizeof(long) < 8) {
1650                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1651                         sfs->f_bsize <<= 1;
1652
1653                         osfs.os_blocks >>= 1;
1654                         osfs.os_bfree >>= 1;
1655                         osfs.os_bavail >>= 1;
1656                 }
1657         }
1658
1659         sfs->f_blocks = osfs.os_blocks;
1660         sfs->f_bfree = osfs.os_bfree;
1661         sfs->f_bavail = osfs.os_bavail;
1662
1663         return 0;
1664 }
1665
1666 void ll_inode_size_lock(struct inode *inode)
1667 {
1668         struct ll_inode_info *lli;
1669
1670         LASSERT(!S_ISDIR(inode->i_mode));
1671
1672         lli = ll_i2info(inode);
1673         LASSERT(lli->lli_size_sem_owner != current);
1674         down(&lli->lli_size_sem);
1675         LASSERT(lli->lli_size_sem_owner == NULL);
1676         lli->lli_size_sem_owner = current;
1677 }
1678
1679 void ll_inode_size_unlock(struct inode *inode)
1680 {
1681         struct ll_inode_info *lli;
1682
1683         lli = ll_i2info(inode);
1684         LASSERT(lli->lli_size_sem_owner == current);
1685         lli->lli_size_sem_owner = NULL;
1686         up(&lli->lli_size_sem);
1687 }
1688
1689 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1690 {
1691         struct ll_inode_info *lli = ll_i2info(inode);
1692         struct mdt_body *body = md->body;
1693         struct lov_stripe_md *lsm = md->lsm;
1694         struct ll_sb_info *sbi = ll_i2sbi(inode);
1695
1696         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1697         if (lsm != NULL) {
1698                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1699                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1700                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1701         }
1702
1703         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1704                 if (body->valid & OBD_MD_FLRMTPERM)
1705                         ll_update_remote_perm(inode, md->remote_perm);
1706         }
1707 #ifdef CONFIG_FS_POSIX_ACL
1708         else if (body->valid & OBD_MD_FLACL) {
1709                 spin_lock(&lli->lli_lock);
1710                 if (lli->lli_posix_acl)
1711                         posix_acl_release(lli->lli_posix_acl);
1712                 lli->lli_posix_acl = md->posix_acl;
1713                 spin_unlock(&lli->lli_lock);
1714         }
1715 #endif
1716         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1717         inode->i_generation = cl_fid_build_gen(&body->fid1);
1718
1719         if (body->valid & OBD_MD_FLATIME) {
1720                 if (body->atime > LTIME_S(inode->i_atime))
1721                         LTIME_S(inode->i_atime) = body->atime;
1722                 lli->lli_lvb.lvb_atime = body->atime;
1723         }
1724         if (body->valid & OBD_MD_FLMTIME) {
1725                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1726                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1727                                "to "LPU64"\n", inode->i_ino,
1728                                LTIME_S(inode->i_mtime), body->mtime);
1729                         LTIME_S(inode->i_mtime) = body->mtime;
1730                 }
1731                 lli->lli_lvb.lvb_mtime = body->mtime;
1732         }
1733         if (body->valid & OBD_MD_FLCTIME) {
1734                 if (body->ctime > LTIME_S(inode->i_ctime))
1735                         LTIME_S(inode->i_ctime) = body->ctime;
1736                 lli->lli_lvb.lvb_ctime = body->ctime;
1737         }
1738         if (body->valid & OBD_MD_FLMODE)
1739                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1740         if (body->valid & OBD_MD_FLTYPE)
1741                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1742         LASSERT(inode->i_mode != 0);
1743         if (S_ISREG(inode->i_mode)) {
1744                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1745         } else {
1746                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1747         }
1748         if (body->valid & OBD_MD_FLUID)
1749                 inode->i_uid = body->uid;
1750         if (body->valid & OBD_MD_FLGID)
1751                 inode->i_gid = body->gid;
1752         if (body->valid & OBD_MD_FLFLAGS)
1753                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1754         if (body->valid & OBD_MD_FLNLINK)
1755                 set_nlink(inode, body->nlink);
1756         if (body->valid & OBD_MD_FLRDEV)
1757                 inode->i_rdev = old_decode_dev(body->rdev);
1758
1759         if (body->valid & OBD_MD_FLID) {
1760                 /* FID shouldn't be changed! */
1761                 if (fid_is_sane(&lli->lli_fid)) {
1762                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1763                                  "Trying to change FID "DFID
1764                                  " to the "DFID", inode %lu/%u(%p)\n",
1765                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1766                                  inode->i_ino, inode->i_generation, inode);
1767                 } else
1768                         lli->lli_fid = body->fid1;
1769         }
1770
1771         LASSERT(fid_seq(&lli->lli_fid) != 0);
1772
1773         if (body->valid & OBD_MD_FLSIZE) {
1774                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1775                     S_ISREG(inode->i_mode) && lli->lli_has_smd) {
1776                         struct lustre_handle lockh;
1777                         ldlm_mode_t mode;
1778
1779                         /* As it is possible a blocking ast has been processed
1780                          * by this time, we need to check there is an UPDATE
1781                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1782                          * it. */
1783                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1784                                                &lockh, LDLM_FL_CBPENDING);
1785                         if (mode) {
1786                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1787                                                       LLIF_EPOCH_PENDING |
1788                                                       LLIF_SOM_DIRTY)) {
1789                                         CERROR("ino %lu flags %u still has "
1790                                                "size authority! do not trust "
1791                                                "the size got from MDS\n",
1792                                                inode->i_ino, lli->lli_flags);
1793                                 } else {
1794                                         /* Use old size assignment to avoid
1795                                          * deadlock bz14138 & bz14326 */
1796                                         i_size_write(inode, body->size);
1797                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1798                                 }
1799                                 ldlm_lock_decref(&lockh, mode);
1800                         }
1801                 } else {
1802                         /* Use old size assignment to avoid
1803                          * deadlock bz14138 & bz14326 */
1804                         i_size_write(inode, body->size);
1805
1806                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1807                                inode->i_ino, (unsigned long long)body->size);
1808                 }
1809
1810                 if (body->valid & OBD_MD_FLBLOCKS)
1811                         inode->i_blocks = body->blocks;
1812         }
1813
1814         if (body->valid & OBD_MD_FLMDSCAPA) {
1815                 LASSERT(md->mds_capa);
1816                 ll_add_capa(inode, md->mds_capa);
1817         }
1818         if (body->valid & OBD_MD_FLOSSCAPA) {
1819                 LASSERT(md->oss_capa);
1820                 ll_add_capa(inode, md->oss_capa);
1821         }
1822 }
1823
1824 void ll_read_inode2(struct inode *inode, void *opaque)
1825 {
1826         struct lustre_md *md = opaque;
1827         struct ll_inode_info *lli = ll_i2info(inode);
1828         ENTRY;
1829
1830         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1831                PFID(&lli->lli_fid), inode);
1832
1833         LASSERT(!lli->lli_has_smd);
1834
1835         /* Core attributes from the MDS first.  This is a new inode, and
1836          * the VFS doesn't zero times in the core inode so we have to do
1837          * it ourselves.  They will be overwritten by either MDS or OST
1838          * attributes - we just need to make sure they aren't newer. */
1839         LTIME_S(inode->i_mtime) = 0;
1840         LTIME_S(inode->i_atime) = 0;
1841         LTIME_S(inode->i_ctime) = 0;
1842         inode->i_rdev = 0;
1843         ll_update_inode(inode, md);
1844
1845         /* OIDEBUG(inode); */
1846
1847         /* initializing backing dev info. */
1848         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1849
1850
1851         if (S_ISREG(inode->i_mode)) {
1852                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1853                 inode->i_op = &ll_file_inode_operations;
1854                 inode->i_fop = sbi->ll_fop;
1855                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1856                 EXIT;
1857         } else if (S_ISDIR(inode->i_mode)) {
1858                 inode->i_op = &ll_dir_inode_operations;
1859                 inode->i_fop = &ll_dir_operations;
1860                 EXIT;
1861         } else if (S_ISLNK(inode->i_mode)) {
1862                 inode->i_op = &ll_fast_symlink_inode_operations;
1863                 EXIT;
1864         } else {
1865                 inode->i_op = &ll_special_inode_operations;
1866
1867                 init_special_inode(inode, inode->i_mode,
1868                                    inode->i_rdev);
1869
1870                 EXIT;
1871         }
1872 }
1873
1874 void ll_delete_inode(struct inode *inode)
1875 {
1876         struct cl_inode_info *lli = cl_i2info(inode);
1877         ENTRY;
1878
1879         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1880                 /* discard all dirty pages before truncating them, required by
1881                  * osc_extent implementation at LU-1030. */
1882                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1883
1884         truncate_inode_pages(&inode->i_data, 0);
1885
1886         /* Workaround for LU-118 */
1887         if (inode->i_data.nrpages) {
1888                 TREE_READ_LOCK_IRQ(&inode->i_data);
1889                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1890                 LASSERTF(inode->i_data.nrpages == 0,
1891                          "inode=%lu/%u(%p) nrpages=%lu, see "
1892                          "http://jira.whamcloud.com/browse/LU-118\n",
1893                          inode->i_ino, inode->i_generation, inode,
1894                          inode->i_data.nrpages);
1895         }
1896         /* Workaround end */
1897
1898 #ifdef HAVE_SBOPS_EVICT_INODE
1899         ll_clear_inode(inode);
1900 #endif
1901         clear_inode(inode);
1902
1903         EXIT;
1904 }
1905
1906 int ll_iocontrol(struct inode *inode, struct file *file,
1907                  unsigned int cmd, unsigned long arg)
1908 {
1909         struct ll_sb_info *sbi = ll_i2sbi(inode);
1910         struct ptlrpc_request *req = NULL;
1911         int rc, flags = 0;
1912         ENTRY;
1913
1914         switch(cmd) {
1915         case FSFILT_IOC_GETFLAGS: {
1916                 struct mdt_body *body;
1917                 struct md_op_data *op_data;
1918
1919                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1920                                              0, 0, LUSTRE_OPC_ANY,
1921                                              NULL);
1922                 if (IS_ERR(op_data))
1923                         RETURN(PTR_ERR(op_data));
1924
1925                 op_data->op_valid = OBD_MD_FLFLAGS;
1926                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1927                 ll_finish_md_op_data(op_data);
1928                 if (rc) {
1929                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1930                         RETURN(-abs(rc));
1931                 }
1932
1933                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1934
1935                 flags = body->flags;
1936
1937                 ptlrpc_req_finished(req);
1938
1939                 RETURN(put_user(flags, (int *)arg));
1940         }
1941         case FSFILT_IOC_SETFLAGS: {
1942                 struct lov_stripe_md *lsm;
1943                 struct obd_info oinfo = { { { 0 } } };
1944                 struct md_op_data *op_data;
1945
1946                 if (get_user(flags, (int *)arg))
1947                         RETURN(-EFAULT);
1948
1949                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1950                                              LUSTRE_OPC_ANY, NULL);
1951                 if (IS_ERR(op_data))
1952                         RETURN(PTR_ERR(op_data));
1953
1954                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1955                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1956                 rc = md_setattr(sbi->ll_md_exp, op_data,
1957                                 NULL, 0, NULL, 0, &req, NULL);
1958                 ll_finish_md_op_data(op_data);
1959                 ptlrpc_req_finished(req);
1960                 if (rc)
1961                         RETURN(rc);
1962
1963                 inode->i_flags = ll_ext_to_inode_flags(flags);
1964
1965                 lsm = ccc_inode_lsm_get(inode);
1966                 if (lsm == NULL)
1967                         RETURN(0);
1968
1969                 OBDO_ALLOC(oinfo.oi_oa);
1970                 if (!oinfo.oi_oa) {
1971                         ccc_inode_lsm_put(inode, lsm);
1972                         RETURN(-ENOMEM);
1973                 }
1974                 oinfo.oi_md = lsm;
1975                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1976                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1977                 oinfo.oi_oa->o_flags = flags;
1978                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1979                                        OBD_MD_FLGROUP;
1980                 oinfo.oi_capa = ll_mdscapa_get(inode);
1981                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1982                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1983                 capa_put(oinfo.oi_capa);
1984                 OBDO_FREE(oinfo.oi_oa);
1985                 ccc_inode_lsm_put(inode, lsm);
1986
1987                 if (rc && rc != -EPERM && rc != -EACCES)
1988                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1989
1990                 RETURN(rc);
1991         }
1992         default:
1993                 RETURN(-ENOSYS);
1994         }
1995
1996         RETURN(0);
1997 }
1998
1999 int ll_flush_ctx(struct inode *inode)
2000 {
2001         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2002
2003         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2004
2005         obd_set_info_async(NULL, sbi->ll_md_exp,
2006                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2007                            0, NULL, NULL);
2008         obd_set_info_async(NULL, sbi->ll_dt_exp,
2009                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2010                            0, NULL, NULL);
2011         return 0;
2012 }
2013
2014 /* umount -f client means force down, don't save state */
2015 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2016 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2017 {
2018         struct super_block *sb = vfsmnt->mnt_sb;
2019 #else
2020 void ll_umount_begin(struct super_block *sb)
2021 {
2022 #endif
2023         struct ll_sb_info *sbi = ll_s2sbi(sb);
2024         struct obd_device *obd;
2025         struct obd_ioctl_data *ioc_data;
2026         ENTRY;
2027
2028 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2029         if (!(flags & MNT_FORCE)) {
2030                 EXIT;
2031                 return;
2032         }
2033 #endif
2034
2035         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2036                sb->s_count, atomic_read(&sb->s_active));
2037
2038         obd = class_exp2obd(sbi->ll_md_exp);
2039         if (obd == NULL) {
2040                 CERROR("Invalid MDC connection handle "LPX64"\n",
2041                        sbi->ll_md_exp->exp_handle.h_cookie);
2042                 EXIT;
2043                 return;
2044         }
2045         obd->obd_force = 1;
2046
2047         obd = class_exp2obd(sbi->ll_dt_exp);
2048         if (obd == NULL) {
2049                 CERROR("Invalid LOV connection handle "LPX64"\n",
2050                        sbi->ll_dt_exp->exp_handle.h_cookie);
2051                 EXIT;
2052                 return;
2053         }
2054         obd->obd_force = 1;
2055
2056         OBD_ALLOC_PTR(ioc_data);
2057         if (ioc_data) {
2058                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2059                               sizeof ioc_data, ioc_data, NULL);
2060
2061                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2062                               sizeof ioc_data, ioc_data, NULL);
2063
2064                 OBD_FREE_PTR(ioc_data);
2065         }
2066
2067
2068         /* Really, we'd like to wait until there are no requests outstanding,
2069          * and then continue.  For now, we just invalidate the requests,
2070          * schedule() and sleep one second if needed, and hope.
2071          */
2072         cfs_schedule();
2073 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2074         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2075                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2076                                                    cfs_time_seconds(1));
2077                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2078                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2079                                       "may try to umount it a bit later\n",
2080                                       atomic_read(&vfsmnt->mnt_count));
2081         }
2082 #endif
2083
2084         EXIT;
2085 }
2086
2087 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2088 {
2089         struct ll_sb_info *sbi = ll_s2sbi(sb);
2090         char *profilenm = get_profile_name(sb);
2091         int err;
2092         __u32 read_only;
2093
2094         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2095                 read_only = *flags & MS_RDONLY;
2096                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2097                                          sizeof(KEY_READ_ONLY),
2098                                          KEY_READ_ONLY, sizeof(read_only),
2099                                          &read_only, NULL);
2100                 if (err) {
2101                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2102                                       profilenm, read_only ?
2103                                       "read-only" : "read-write", err);
2104                         return err;
2105                 }
2106
2107                 if (read_only)
2108                         sb->s_flags |= MS_RDONLY;
2109                 else
2110                         sb->s_flags &= ~MS_RDONLY;
2111
2112                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2113                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2114                                       read_only ?  "read-only" : "read-write");
2115         }
2116         return 0;
2117 }
2118
2119 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2120                   struct super_block *sb, struct lookup_intent *it)
2121 {
2122         struct ll_sb_info *sbi = NULL;
2123         struct lustre_md md;
2124         int rc;
2125         ENTRY;
2126
2127         LASSERT(*inode || sb);
2128         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2129         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2130                               sbi->ll_md_exp, &md);
2131         if (rc)
2132                 RETURN(rc);
2133
2134         if (*inode) {
2135                 ll_update_inode(*inode, &md);
2136         } else {
2137                 LASSERT(sb != NULL);
2138
2139                 /*
2140                  * At this point server returns to client's same fid as client
2141                  * generated for creating. So using ->fid1 is okay here.
2142                  */
2143                 LASSERT(fid_is_sane(&md.body->fid1));
2144
2145                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2146                 if (*inode == NULL || IS_ERR(*inode)) {
2147 #ifdef CONFIG_FS_POSIX_ACL
2148                         if (md.posix_acl) {
2149                                 posix_acl_release(md.posix_acl);
2150                                 md.posix_acl = NULL;
2151                         }
2152 #endif
2153                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2154                         *inode = NULL;
2155                         CERROR("new_inode -fatal: rc %d\n", rc);
2156                         GOTO(out, rc);
2157                 }
2158         }
2159
2160         /* Handling piggyback layout lock.
2161          * Layout lock can be piggybacked by getattr and open request.
2162          * The lsm can be applied to inode only if it comes with a layout lock
2163          * otherwise correct layout may be overwritten, for example:
2164          * 1. proc1: mdt returns a lsm but not granting layout
2165          * 2. layout was changed by another client
2166          * 3. proc2: refresh layout and layout lock granted
2167          * 4. proc1: to apply a stale layout */
2168         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2169                 struct lustre_handle lockh;
2170                 struct ldlm_lock *lock;
2171
2172                 lockh.cookie = it->d.lustre.it_lock_handle;
2173                 lock = ldlm_handle2lock(&lockh);
2174                 LASSERT(lock != NULL);
2175                 if (ldlm_has_layout(lock)) {
2176                         struct cl_object_conf conf;
2177
2178                         memset(&conf, 0, sizeof(conf));
2179                         conf.coc_opc = OBJECT_CONF_SET;
2180                         conf.coc_inode = *inode;
2181                         conf.coc_lock = lock;
2182                         conf.u.coc_md = &md;
2183                         (void)ll_layout_conf(*inode, &conf);
2184                 }
2185                 LDLM_LOCK_PUT(lock);
2186         }
2187
2188 out:
2189         if (md.lsm != NULL)
2190                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2191         md_free_lustre_md(sbi->ll_md_exp, &md);
2192         RETURN(rc);
2193 }
2194
2195 int ll_obd_statfs(struct inode *inode, void *arg)
2196 {
2197         struct ll_sb_info *sbi = NULL;
2198         struct obd_export *exp;
2199         char *buf = NULL;
2200         struct obd_ioctl_data *data = NULL;
2201         __u32 type;
2202         __u32 flags;
2203         int len = 0, rc;
2204
2205         if (!inode || !(sbi = ll_i2sbi(inode)))
2206                 GOTO(out_statfs, rc = -EINVAL);
2207
2208         rc = obd_ioctl_getdata(&buf, &len, arg);
2209         if (rc)
2210                 GOTO(out_statfs, rc);
2211
2212         data = (void*)buf;
2213         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2214             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2215                 GOTO(out_statfs, rc = -EINVAL);
2216
2217         if (data->ioc_inllen1 != sizeof(__u32) ||
2218             data->ioc_inllen2 != sizeof(__u32) ||
2219             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2220             data->ioc_plen2 != sizeof(struct obd_uuid))
2221                 GOTO(out_statfs, rc = -EINVAL);
2222
2223         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2224         if (type & LL_STATFS_LMV)
2225                 exp = sbi->ll_md_exp;
2226         else if (type & LL_STATFS_LOV)
2227                 exp = sbi->ll_dt_exp;
2228         else
2229                 GOTO(out_statfs, rc = -ENODEV);
2230
2231         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2232         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2233         if (rc)
2234                 GOTO(out_statfs, rc);
2235 out_statfs:
2236         if (buf)
2237                 obd_ioctl_freedata(buf, len);
2238         return rc;
2239 }
2240
2241 int ll_process_config(struct lustre_cfg *lcfg)
2242 {
2243         char *ptr;
2244         void *sb;
2245         struct lprocfs_static_vars lvars;
2246         unsigned long x;
2247         int rc = 0;
2248
2249         lprocfs_llite_init_vars(&lvars);
2250
2251         /* The instance name contains the sb: lustre-client-aacfe000 */
2252         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2253         if (!ptr || !*(++ptr))
2254                 return -EINVAL;
2255         if (sscanf(ptr, "%lx", &x) != 1)
2256                 return -EINVAL;
2257         sb = (void *)x;
2258         /* This better be a real Lustre superblock! */
2259         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2260
2261         /* Note we have not called client_common_fill_super yet, so
2262            proc fns must be able to handle that! */
2263         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2264                                       lcfg, sb);
2265         if (rc > 0)
2266                 rc = 0;
2267         return(rc);
2268 }
2269
2270 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2271 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2272                                        struct inode *i1, struct inode *i2,
2273                                        const char *name, int namelen,
2274                                        int mode, __u32 opc, void *data)
2275 {
2276         LASSERT(i1 != NULL);
2277
2278         if (namelen > ll_i2sbi(i1)->ll_namelen)
2279                 return ERR_PTR(-ENAMETOOLONG);
2280
2281         if (op_data == NULL)
2282                 OBD_ALLOC_PTR(op_data);
2283
2284         if (op_data == NULL)
2285                 return ERR_PTR(-ENOMEM);
2286
2287         ll_i2gids(op_data->op_suppgids, i1, i2);
2288         op_data->op_fid1 = *ll_inode2fid(i1);
2289         op_data->op_capa1 = ll_mdscapa_get(i1);
2290
2291         if (i2) {
2292                 op_data->op_fid2 = *ll_inode2fid(i2);
2293                 op_data->op_capa2 = ll_mdscapa_get(i2);
2294         } else {
2295                 fid_zero(&op_data->op_fid2);
2296                 op_data->op_capa2 = NULL;
2297         }
2298
2299         op_data->op_name = name;
2300         op_data->op_namelen = namelen;
2301         op_data->op_mode = mode;
2302         op_data->op_mod_time = cfs_time_current_sec();
2303         op_data->op_fsuid = cfs_curproc_fsuid();
2304         op_data->op_fsgid = cfs_curproc_fsgid();
2305         op_data->op_cap = cfs_curproc_cap_pack();
2306         op_data->op_bias = 0;
2307         op_data->op_opc = opc;
2308         op_data->op_mds = 0;
2309         op_data->op_data = data;
2310
2311         /* If the file is being opened after mknod() (normally due to NFS)
2312          * try to use the default stripe data from parent directory for
2313          * allocating OST objects.  Try to pass the parent FID to MDS. */
2314         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2315             !ll_i2info(i2)->lli_has_smd) {
2316                 struct ll_inode_info *lli = ll_i2info(i2);
2317
2318                 spin_lock(&lli->lli_lock);
2319                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2320                         op_data->op_fid1 = lli->lli_pfid;
2321                 spin_unlock(&lli->lli_lock);
2322                 /** We ignore parent's capability temporary. */
2323         }
2324
2325         /* When called by ll_setattr_raw, file is i1. */
2326         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2327                 op_data->op_bias |= MDS_DATA_MODIFIED;
2328
2329         return op_data;
2330 }
2331
2332 void ll_finish_md_op_data(struct md_op_data *op_data)
2333 {
2334         capa_put(op_data->op_capa1);
2335         capa_put(op_data->op_capa2);
2336         OBD_FREE_PTR(op_data);
2337 }
2338
2339 #ifdef HAVE_SUPEROPS_USE_DENTRY
2340 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2341 #else
2342 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2343 #endif
2344 {
2345         struct ll_sb_info *sbi;
2346
2347 #ifdef HAVE_SUPEROPS_USE_DENTRY
2348         LASSERT((seq != NULL) && (dentry != NULL));
2349         sbi = ll_s2sbi(dentry->d_sb);
2350 #else
2351         LASSERT((seq != NULL) && (vfs != NULL));
2352         sbi = ll_s2sbi(vfs->mnt_sb);
2353 #endif
2354
2355         if (sbi->ll_flags & LL_SBI_NOLCK)
2356                 seq_puts(seq, ",nolock");
2357
2358         if (sbi->ll_flags & LL_SBI_FLOCK)
2359                 seq_puts(seq, ",flock");
2360
2361         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2362                 seq_puts(seq, ",localflock");
2363
2364         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2365                 seq_puts(seq, ",user_xattr");
2366
2367         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2368                 seq_puts(seq, ",lazystatfs");
2369
2370         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2371                 seq_puts(seq, ",user_fid2path");
2372
2373         RETURN(0);
2374 }
2375
2376 /**
2377  * Get obd name by cmd, and copy out to user space
2378  */
2379 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2380 {
2381         struct ll_sb_info *sbi = ll_i2sbi(inode);
2382         struct obd_device *obd;
2383         ENTRY;
2384
2385         if (cmd == OBD_IOC_GETDTNAME)
2386                 obd = class_exp2obd(sbi->ll_dt_exp);
2387         else if (cmd == OBD_IOC_GETMDNAME)
2388                 obd = class_exp2obd(sbi->ll_md_exp);
2389         else
2390                 RETURN(-EINVAL);
2391
2392         if (!obd)
2393                 RETURN(-ENOENT);
2394
2395         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2396                              strlen(obd->obd_name) + 1))
2397                 RETURN(-EFAULT);
2398
2399         RETURN(0);
2400 }
2401
2402 /**
2403  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2404  * fsname will be returned in this buffer; otherwise, a static buffer will be
2405  * used to store the fsname and returned to caller.
2406  */
2407 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2408 {
2409         static char fsname_static[MTI_NAME_MAXLEN];
2410         struct lustre_sb_info *lsi = s2lsi(sb);
2411         char *ptr;
2412         int len;
2413
2414         if (buf == NULL) {
2415                 /* this means the caller wants to use static buffer
2416                  * and it doesn't care about race. Usually this is
2417                  * in error reporting path */
2418                 buf = fsname_static;
2419                 buflen = sizeof(fsname_static);
2420         }
2421
2422         len = strlen(lsi->lsi_lmd->lmd_profile);
2423         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2424         if (ptr && (strcmp(ptr, "-client") == 0))
2425                 len -= 7;
2426
2427         if (unlikely(len >= buflen))
2428                 len = buflen - 1;
2429         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2430         buf[len] = '\0';
2431
2432         return buf;
2433 }
2434
2435 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2436 {
2437         char *path = NULL;
2438
2439 #ifdef HAVE_FS_STRUCT_USE_PATH
2440         struct path p;
2441
2442         p.dentry = dentry;
2443         p.mnt = current->fs->root.mnt;
2444         path_get(&p);
2445         path = d_path(&p, buf, bufsize);
2446         path_put(&p);
2447 #else
2448         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2449 #endif
2450
2451         return path;
2452 }
2453
2454 void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
2455 {
2456         char *buf, *path = NULL;
2457         struct dentry *dentry = NULL;
2458         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2459
2460         /* this can be called inside spin lock so use GFP_ATOMIC. */
2461         buf = (char *)__get_free_page(GFP_ATOMIC);
2462         if (buf != NULL) {
2463                 dentry = d_find_alias(page->mapping->host);
2464                 if (dentry != NULL)
2465                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2466         }
2467
2468         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2469               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2470               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2471               PFID(&obj->cob_header.coh_lu.loh_fid),
2472               (path && !IS_ERR(path)) ? path : "", ioret);
2473
2474         if (dentry != NULL)
2475                 dput(dentry);
2476
2477         if (buf != NULL)
2478                 free_page((unsigned long)buf);
2479 }