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                 lru_page_max = pages / 2;
  98         } else {
  99                 lru_page_max = (pages / 4) * 3;
 100         }
 101
 102         /* initialize lru data */
 103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 104         sbi->ll_cache.ccc_lru_max = lru_page_max;
 105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 108
 109         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 110                                            SBI_DEFAULT_READAHEAD_MAX);
 111         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 112         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 113                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 114         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 115         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 116
 117         ll_generate_random_uuid(uuid);
 118         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 119         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 120
 121         spin_lock(&ll_sb_lock);
 122         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 123         spin_unlock(&ll_sb_lock);
 124
 125         sbi->ll_flags |= LL_SBI_VERBOSE;
 126 #ifdef ENABLE_CHECKSUM
 127         sbi->ll_flags |= LL_SBI_CHECKSUM;
 128 #endif
 129
 130 #ifdef HAVE_LRU_RESIZE_SUPPORT
 131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 132 #endif
 133
 134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 135                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 136                                pp_r_hist.oh_lock);
 137                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 138                                pp_w_hist.oh_lock);
 139         }
 140
 141         /* metadata statahead is enabled by default */
 142         sbi->ll_sa_max = LL_SA_RPC_DEF;
 143         cfs_atomic_set(&sbi->ll_sa_total, 0);
 144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 145         cfs_atomic_set(&sbi->ll_agl_total, 0);
 146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 147
 148         RETURN(sbi);
 149 }
 150
 151 void ll_free_sbi(struct super_block *sb)
 152 {
 153         struct ll_sb_info *sbi = ll_s2sbi(sb);
 154         ENTRY;
 155
 156         if (sbi != NULL) {
 157                 spin_lock(&ll_sb_lock);
 158                 cfs_list_del(&sbi->ll_list);
 159                 spin_unlock(&ll_sb_lock);
 160                 OBD_FREE(sbi, sizeof(*sbi));
 161         }
 162         EXIT;
 163 }
 164
 165 static struct dentry_operations ll_d_root_ops = {
 166         .d_compare = ll_dcompare,
 167         .d_revalidate = ll_revalidate_nd,
 168 };
 169
 170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 171                                     struct vfsmount *mnt)
 172 {
 173         struct inode *root = 0;
 174         struct ll_sb_info *sbi = ll_s2sbi(sb);
 175         struct obd_device *obd;
 176         struct obd_capa *oc = NULL;
 177         struct obd_statfs *osfs = NULL;
 178         struct ptlrpc_request *request = NULL;
 179         struct obd_connect_data *data = NULL;
 180         struct obd_uuid *uuid;
 181         struct md_op_data *op_data;
 182         struct lustre_md lmd;
 183         obd_valid valid;
 184         int size, err, checksum;
 185         ENTRY;
 186
 187         obd = class_name2obd(md);
 188         if (!obd) {
 189                 CERROR("MD %s: not setup or attached\n", md);
 190                 RETURN(-EINVAL);
 191         }
 192
 193         OBD_ALLOC_PTR(data);
 194         if (data == NULL)
 195                 RETURN(-ENOMEM);
 196
 197         OBD_ALLOC_PTR(osfs);
 198         if (osfs == NULL) {
 199                 OBD_FREE_PTR(data);
 200                 RETURN(-ENOMEM);
 201         }
 202
 203         if (proc_lustre_fs_root) {
 204                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 205                                                   dt, md);
 206                 if (err < 0)
 207                         CERROR("could not register mount in /proc/fs/lustre\n");
 208         }
 209
 210         /* indicate the features supported by this client */
 211         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 212                                   OBD_CONNECT_ATTRFID  |
 213                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 214                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 215                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 216                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 217                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 218                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 219                                   OBD_CONNECT_EINPROGRESS |
 220                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 221                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 222
 223         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 224                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 225
 226 #ifdef HAVE_LRU_RESIZE_SUPPORT
 227         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 228                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 229 #endif
 230 #ifdef CONFIG_FS_POSIX_ACL
 231         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 232 #endif
 233
 234         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 235                 /* flag mdc connection as lightweight, only used for test
 236                  * purpose, use with care */
 237                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 238
 239         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 240         data->ocd_version = LUSTRE_VERSION_CODE;
 241
 242         if (sb->s_flags & MS_RDONLY)
 243                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 244         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 245                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 246
 247 #ifdef HAVE_MS_FLOCK_LOCK
 248         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 249         sb->s_flags |= MS_FLOCK_LOCK;
 250 #endif
 251 #ifdef MS_HAS_NEW_AOPS
 252         sb->s_flags |= MS_HAS_NEW_AOPS;
 253 #endif
 254
 255         if (sbi->ll_flags & LL_SBI_FLOCK)
 256                 sbi->ll_fop = &ll_file_operations_flock;
 257         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 258                 sbi->ll_fop = &ll_file_operations;
 259         else
 260                 sbi->ll_fop = &ll_file_operations_noflock;
 261
 262         /* real client */
 263         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 264         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 265                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 266
 267         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 268
 269         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 270         if (err == -EBUSY) {
 271                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 272                                    "recovery, of which this client is not a "
 273                                    "part. Please wait for recovery to complete,"
 274                                    " abort, or time out.\n", md);
 275                 GOTO(out, err);
 276         } else if (err) {
 277                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 278                 GOTO(out, err);
 279         }
 280
 281         sbi->ll_md_exp->exp_connect_data = *data;
 282
 283         /* For mount, we only need fs info from MDT0, and also in DNE, it
 284          * can make sure the client can be mounted as long as MDT0 is
 285          * avaible */
 286         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 287                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 288                         OBD_STATFS_FOR_MDT0);
 289         if (err)
 290                 GOTO(out_md, err);
 291
 292         /* This needs to be after statfs to ensure connect has finished.
 293          * Note that "data" does NOT contain the valid connect reply.
 294          * If connecting to a 1.8 server there will be no LMV device, so
 295          * we can access the MDC export directly and exp_connect_flags will
 296          * be non-zero, but if accessing an upgraded 2.1 server it will
 297          * have the correct flags filled in.
 298          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 299         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 300         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 301             valid != CLIENT_CONNECT_MDT_REQD) {
 302                 char *buf;
 303
 304                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 305                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
 306                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 307                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 308                                    "feature(s) needed for correct operation "
 309                                    "of this client (%s). Please upgrade "
 310                                    "server or downgrade client.\n",
 311                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 312                 OBD_FREE(buf, CFS_PAGE_SIZE);
 313                 GOTO(out_md, err = -EPROTO);
 314         }
 315
 316         size = sizeof(*data);
 317         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 318                            KEY_CONN_DATA,  &size, data, NULL);
 319         if (err) {
 320                 CERROR("%s: Get connect data failed: rc = %d\n",
 321                        sbi->ll_md_exp->exp_obd->obd_name, err);
 322                 GOTO(out_md, err);
 323         }
 324
 325         LASSERT(osfs->os_bsize);
 326         sb->s_blocksize = osfs->os_bsize;
 327         sb->s_blocksize_bits = log2(osfs->os_bsize);
 328         sb->s_magic = LL_SUPER_MAGIC;
 329         sb->s_maxbytes = MAX_LFS_FILESIZE;
 330         sbi->ll_namelen = osfs->os_namelen;
 331         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 332
 333         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 334             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 335                 LCONSOLE_INFO("Disabling user_xattr feature because "
 336                               "it is not supported on the server\n");
 337                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 338         }
 339
 340         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 341 #ifdef MS_POSIXACL
 342                 sb->s_flags |= MS_POSIXACL;
 343 #endif
 344                 sbi->ll_flags |= LL_SBI_ACL;
 345         } else {
 346                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 347 #ifdef MS_POSIXACL
 348                 sb->s_flags &= ~MS_POSIXACL;
 349 #endif
 350                 sbi->ll_flags &= ~LL_SBI_ACL;
 351         }
 352
 353         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 354                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 355                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 356                         LCONSOLE_INFO("client is set as remote by default.\n");
 357                 }
 358         } else {
 359                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 360                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 361                         LCONSOLE_INFO("client claims to be remote, but server "
 362                                       "rejected, forced to be local.\n");
 363                 }
 364         }
 365
 366         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 367                 LCONSOLE_INFO("client enabled MDS capability!\n");
 368                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 369         }
 370
 371         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 372                 LCONSOLE_INFO("client enabled OSS capability!\n");
 373                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 374         }
 375
 376         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 377                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 378
 379         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 380                 sbi->ll_md_brw_size = data->ocd_brw_size;
 381         else
 382                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
 383
 384         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 385                 LCONSOLE_INFO("Layout lock feature supported.\n");
 386                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 387         }
 388
 389         obd = class_name2obd(dt);
 390         if (!obd) {
 391                 CERROR("DT %s: not setup or attached\n", dt);
 392                 GOTO(out_md, err = -ENODEV);
 393         }
 394
 395         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 396                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 397                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 398                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 399                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 400                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 401                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 402                                   OBD_CONNECT_MAXBYTES |
 403                                   OBD_CONNECT_EINPROGRESS |
 404                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 405                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 406
 407         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 408                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 409
 410         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 411                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 412                  * disabled by default, because it can still be enabled on the
 413                  * fly via /proc. As a consequence, we still need to come to an
 414                  * agreement on the supported algorithms at connect time */
 415                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 416
 417                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 418                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 419                 else
 420                         data->ocd_cksum_types = cksum_types_supported_client();
 421         }
 422
 423 #ifdef HAVE_LRU_RESIZE_SUPPORT
 424         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 425 #endif
 426         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 427                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 428
 429         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 430                "ocd_grant: %d\n", data->ocd_connect_flags,
 431                data->ocd_version, data->ocd_grant);
 432
 433         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 434         obd->obd_upcall.onu_upcall = cl_ocd_update;
 435
 436         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 437
 438         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 439                           NULL);
 440         if (err == -EBUSY) {
 441                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 442                                    "recovery, of which this client is not a "
 443                                    "part.  Please wait for recovery to "
 444                                    "complete, abort, or time out.\n", dt);
 445                 GOTO(out_md, err);
 446         } else if (err) {
 447                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 448                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 449                 GOTO(out_md, err);
 450         }
 451
 452         sbi->ll_dt_exp->exp_connect_data = *data;
 453
 454         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_NONE;
 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                 lli->lli_volatile = false;
 942         }
 943         mutex_init(&lli->lli_layout_mutex);
 944 }
 945
 946 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 947 {
 948 #ifdef HAVE_BDI_REGISTER
 949         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 950
 951 #ifdef HAVE_BDI_NAME
 952         bdi->name = "lustre";
 953 #endif
 954         return bdi_register(bdi, NULL, "lustre-%d",
 955                             atomic_inc_return(&ll_bdi_num));
 956 #else
 957         return 0;
 958 #endif
 959 }
 960
 961 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 962 {
 963         struct lustre_profile *lprof = NULL;
 964         struct lustre_sb_info *lsi = s2lsi(sb);
 965         struct ll_sb_info *sbi;
 966         char  *dt = NULL, *md = NULL;
 967         char  *profilenm = get_profile_name(sb);
 968         struct config_llog_instance *cfg;
 969         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 970         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 971         int    err;
 972         ENTRY;
 973
 974         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 975
 976         OBD_ALLOC_PTR(cfg);
 977         if (cfg == NULL)
 978                 RETURN(-ENOMEM);
 979
 980         cfs_module_get();
 981
 982         /* client additional sb info */
 983         lsi->lsi_llsbi = sbi = ll_init_sbi();
 984         if (!sbi) {
 985                 cfs_module_put(THIS_MODULE);
 986                 OBD_FREE_PTR(cfg);
 987                 RETURN(-ENOMEM);
 988         }
 989
 990         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 991         if (err)
 992                 GOTO(out_free, err);
 993
 994         err = bdi_init(&lsi->lsi_bdi);
 995         if (err)
 996                 GOTO(out_free, err);
 997         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 998         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 999         err = ll_bdi_register(&lsi->lsi_bdi);
1000         if (err)
1001                 GOTO(out_free, err);
1002
1003 #ifdef HAVE_SB_BDI
1004         sb->s_bdi = &lsi->lsi_bdi;
1005 #endif
1006
1007         /* Generate a string unique to this super, in case some joker tries
1008            to mount the same fs at two mount points.
1009            Use the address of the super itself.*/
1010         cfg->cfg_instance = sb;
1011         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1012         cfg->cfg_callback = class_config_llog_handler;
1013         /* set up client obds */
1014         err = lustre_process_log(sb, profilenm, cfg);
1015         if (err < 0) {
1016                 CERROR("Unable to process log: %d\n", err);
1017                 GOTO(out_free, err);
1018         }
1019
1020         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1021         lprof = class_get_profile(profilenm);
1022         if (lprof == NULL) {
1023                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1024                                    " read from the MGS.  Does that filesystem "
1025                                    "exist?\n", profilenm);
1026                 GOTO(out_free, err = -EINVAL);
1027         }
1028         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1029                lprof->lp_md, lprof->lp_dt);
1030
1031         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1032         if (!dt)
1033                 GOTO(out_free, err = -ENOMEM);
1034         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1035
1036         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1037         if (!md)
1038                 GOTO(out_free, err = -ENOMEM);
1039         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1040
1041         /* connections, registrations, sb setup */
1042         err = client_common_fill_super(sb, md, dt, mnt);
1043
1044 out_free:
1045         if (md)
1046                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1047         if (dt)
1048                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1049         if (err)
1050                 ll_put_super(sb);
1051         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1052                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1053
1054         OBD_FREE_PTR(cfg);
1055         RETURN(err);
1056 } /* ll_fill_super */
1057
1058
1059 void lu_context_keys_dump(void);
1060
1061 void ll_put_super(struct super_block *sb)
1062 {
1063         struct config_llog_instance cfg;
1064         struct obd_device *obd;
1065         struct lustre_sb_info *lsi = s2lsi(sb);
1066         struct ll_sb_info *sbi = ll_s2sbi(sb);
1067         char *profilenm = get_profile_name(sb);
1068         int force = 1, next;
1069         ENTRY;
1070
1071         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1072
1073         ll_print_capa_stat(sbi);
1074
1075         cfg.cfg_instance = sb;
1076         lustre_end_log(sb, profilenm, &cfg);
1077
1078         if (sbi->ll_md_exp) {
1079                 obd = class_exp2obd(sbi->ll_md_exp);
1080                 if (obd)
1081                         force = obd->obd_force;
1082         }
1083
1084         /* We need to set force before the lov_disconnect in
1085            lustre_common_put_super, since l_d cleans up osc's as well. */
1086         if (force) {
1087                 next = 0;
1088                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1089                                                      &next)) != NULL) {
1090                         obd->obd_force = force;
1091                 }
1092         }
1093
1094         if (sbi->ll_lcq) {
1095                 /* Only if client_common_fill_super succeeded */
1096                 client_common_put_super(sb);
1097         }
1098
1099         next = 0;
1100         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1101                 class_manual_cleanup(obd);
1102         }
1103
1104         if (sbi->ll_flags & LL_SBI_VERBOSE)
1105                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1106
1107         if (profilenm)
1108                 class_del_profile(profilenm);
1109
1110         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1111                 bdi_destroy(&lsi->lsi_bdi);
1112                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1113         }
1114
1115         ll_free_sbi(sb);
1116         lsi->lsi_llsbi = NULL;
1117
1118         lustre_common_put_super(sb);
1119
1120         cfs_module_put(THIS_MODULE);
1121
1122         EXIT;
1123 } /* client_put_super */
1124
1125 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1126 {
1127         struct inode *inode = NULL;
1128
1129         /* NOTE: we depend on atomic igrab() -bzzz */
1130         lock_res_and_lock(lock);
1131         if (lock->l_resource->lr_lvb_inode) {
1132                 struct ll_inode_info * lli;
1133                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1134                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1135                         inode = igrab(lock->l_resource->lr_lvb_inode);
1136                 } else {
1137                         inode = lock->l_resource->lr_lvb_inode;
1138                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1139                                          D_WARNING, lock, "lr_lvb_inode %p is "
1140                                          "bogus: magic %08x",
1141                                          lock->l_resource->lr_lvb_inode,
1142                                          lli->lli_inode_magic);
1143                         inode = NULL;
1144                 }
1145         }
1146         unlock_res_and_lock(lock);
1147         return inode;
1148 }
1149
1150 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1151 {
1152         struct inode *inode = NULL;
1153         /* NOTE: we depend on atomic igrab() -bzzz */
1154         lock_res_and_lock(lock);
1155         if (lock->l_ast_data) {
1156                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1157                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1158                         inode = igrab(lock->l_ast_data);
1159                 } else {
1160                         inode = lock->l_ast_data;
1161                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1162                                          D_WARNING, lock, "l_ast_data %p is "
1163                                          "bogus: magic %08x", lock->l_ast_data,
1164                                          lli->lli_inode_magic);
1165                         inode = NULL;
1166                 }
1167         }
1168         unlock_res_and_lock(lock);
1169         return inode;
1170 }
1171
1172 void ll_clear_inode(struct inode *inode)
1173 {
1174         struct ll_inode_info *lli = ll_i2info(inode);
1175         struct ll_sb_info *sbi = ll_i2sbi(inode);
1176         ENTRY;
1177
1178         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1179                inode->i_generation, inode);
1180
1181         if (S_ISDIR(inode->i_mode)) {
1182                 /* these should have been cleared in ll_file_release */
1183                 LASSERT(lli->lli_opendir_key == NULL);
1184                 LASSERT(lli->lli_sai == NULL);
1185                 LASSERT(lli->lli_opendir_pid == 0);
1186         }
1187
1188         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1189         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1190
1191         LASSERT(!lli->lli_open_fd_write_count);
1192         LASSERT(!lli->lli_open_fd_read_count);
1193         LASSERT(!lli->lli_open_fd_exec_count);
1194
1195         if (lli->lli_mds_write_och)
1196                 ll_md_real_close(inode, FMODE_WRITE);
1197         if (lli->lli_mds_exec_och)
1198                 ll_md_real_close(inode, FMODE_EXEC);
1199         if (lli->lli_mds_read_och)
1200                 ll_md_real_close(inode, FMODE_READ);
1201
1202         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1203                 OBD_FREE(lli->lli_symlink_name,
1204                          strlen(lli->lli_symlink_name) + 1);
1205                 lli->lli_symlink_name = NULL;
1206         }
1207
1208         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1209                 LASSERT(lli->lli_posix_acl == NULL);
1210                 if (lli->lli_remote_perms) {
1211                         free_rmtperm_hash(lli->lli_remote_perms);
1212                         lli->lli_remote_perms = NULL;
1213                 }
1214         }
1215 #ifdef CONFIG_FS_POSIX_ACL
1216         else if (lli->lli_posix_acl) {
1217                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1218                 LASSERT(lli->lli_remote_perms == NULL);
1219                 posix_acl_release(lli->lli_posix_acl);
1220                 lli->lli_posix_acl = NULL;
1221         }
1222 #endif
1223         lli->lli_inode_magic = LLI_INODE_DEAD;
1224
1225         ll_clear_inode_capas(inode);
1226         if (!S_ISDIR(inode->i_mode))
1227                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1228
1229         /*
1230          * XXX This has to be done before lsm is freed below, because
1231          * cl_object still uses inode lsm.
1232          */
1233         cl_inode_fini(inode);
1234         lli->lli_has_smd = false;
1235
1236         EXIT;
1237 }
1238
1239 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1240                   struct md_open_data **mod)
1241 {
1242         struct lustre_md md;
1243         struct inode *inode = dentry->d_inode;
1244         struct ll_sb_info *sbi = ll_i2sbi(inode);
1245         struct ptlrpc_request *request = NULL;
1246         int rc, ia_valid;
1247         ENTRY;
1248
1249         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1250                                      LUSTRE_OPC_ANY, NULL);
1251         if (IS_ERR(op_data))
1252                 RETURN(PTR_ERR(op_data));
1253
1254         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1255                         &request, mod);
1256         if (rc) {
1257                 ptlrpc_req_finished(request);
1258                 if (rc == -ENOENT) {
1259                         clear_nlink(inode);
1260                         /* Unlinked special device node? Or just a race?
1261                          * Pretend we done everything. */
1262                         if (!S_ISREG(inode->i_mode) &&
1263                             !S_ISDIR(inode->i_mode)) {
1264                                 ia_valid = op_data->op_attr.ia_valid;
1265                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1266                                 rc = simple_setattr(dentry, &op_data->op_attr);
1267                                 op_data->op_attr.ia_valid = ia_valid;
1268                         }
1269                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1270                         CERROR("md_setattr fails: rc = %d\n", rc);
1271                 }
1272                 RETURN(rc);
1273         }
1274
1275         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1276                               sbi->ll_md_exp, &md);
1277         if (rc) {
1278                 ptlrpc_req_finished(request);
1279                 RETURN(rc);
1280         }
1281
1282         ia_valid = op_data->op_attr.ia_valid;
1283         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1284          * cache is not cleared yet. */
1285         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1286         rc = simple_setattr(dentry, &op_data->op_attr);
1287         op_data->op_attr.ia_valid = ia_valid;
1288
1289         /* Extract epoch data if obtained. */
1290         op_data->op_handle = md.body->handle;
1291         op_data->op_ioepoch = md.body->ioepoch;
1292
1293         ll_update_inode(inode, &md);
1294         ptlrpc_req_finished(request);
1295
1296         RETURN(rc);
1297 }
1298
1299 /* Close IO epoch and send Size-on-MDS attribute update. */
1300 static int ll_setattr_done_writing(struct inode *inode,
1301                                    struct md_op_data *op_data,
1302                                    struct md_open_data *mod)
1303 {
1304         struct ll_inode_info *lli = ll_i2info(inode);
1305         int rc = 0;
1306         ENTRY;
1307
1308         LASSERT(op_data != NULL);
1309         if (!S_ISREG(inode->i_mode))
1310                 RETURN(0);
1311
1312         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1313                op_data->op_ioepoch, PFID(&lli->lli_fid));
1314
1315         op_data->op_flags = MF_EPOCH_CLOSE;
1316         ll_done_writing_attr(inode, op_data);
1317         ll_pack_inode2opdata(inode, op_data, NULL);
1318
1319         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1320         if (rc == -EAGAIN) {
1321                 /* MDS has instructed us to obtain Size-on-MDS attribute
1322                  * from OSTs and send setattr to back to MDS. */
1323                 rc = ll_som_update(inode, op_data);
1324         } else if (rc) {
1325                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1326                        inode->i_ino, rc);
1327         }
1328         RETURN(rc);
1329 }
1330
1331 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1332 {
1333         struct obd_capa *capa;
1334         int rc;
1335
1336         if (attr->ia_valid & ATTR_SIZE)
1337                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1338         else
1339                 capa = ll_mdscapa_get(inode);
1340
1341         rc = cl_setattr_ost(inode, attr, capa);
1342
1343         if (attr->ia_valid & ATTR_SIZE)
1344                 ll_truncate_free_capa(capa);
1345         else
1346                 capa_put(capa);
1347
1348         return rc;
1349 }
1350
1351 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1352 /**
1353  * inode_newsize_ok - may this inode be truncated to a given size
1354  * @inode:      the inode to be truncated
1355  * @offset:     the new size to assign to the inode
1356  * @Returns:    0 on success, -ve errno on failure
1357  *
1358  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1359  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1360  * when necessary. Caller must not proceed with inode size change if failure is
1361  * returned. @inode must be a file (not directory), with appropriate
1362  * permissions to allow truncate (inode_newsize_ok does NOT check these
1363  * conditions).
1364  *
1365  * inode_newsize_ok must be called with i_mutex held.
1366  */
1367 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1368 {
1369         if (inode->i_size < offset) {
1370                 unsigned long limit;
1371
1372                 limit = rlimit(RLIMIT_FSIZE);
1373                 if (limit != RLIM_INFINITY && offset > limit)
1374                         goto out_sig;
1375                 if (offset > inode->i_sb->s_maxbytes)
1376                         goto out_big;
1377         } else {
1378                 /*
1379                  * truncation of in-use swapfiles is disallowed - it would
1380                  * cause subsequent swapout to scribble on the now-freed
1381                  * blocks.
1382                  */
1383                 if (IS_SWAPFILE(inode))
1384                         return -ETXTBSY;
1385         }
1386
1387         return 0;
1388 out_sig:
1389         send_sig(SIGXFSZ, current, 0);
1390 out_big:
1391         return -EFBIG;
1392 }
1393 #endif
1394
1395 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1396  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1397  * keep these values until such a time that objects are allocated for it.
1398  * We do the MDS operations first, as it is checking permissions for us.
1399  * We don't to the MDS RPC if there is nothing that we want to store there,
1400  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1401  * going to do an RPC anyways.
1402  *
1403  * If we are doing a truncate, we will send the mtime and ctime updates
1404  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1405  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1406  * at the same time.
1407  */
1408 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1409 {
1410         struct inode *inode = dentry->d_inode;
1411         struct ll_inode_info *lli = ll_i2info(inode);
1412         struct md_op_data *op_data = NULL;
1413         struct md_open_data *mod = NULL;
1414         int rc = 0, rc1 = 0;
1415         ENTRY;
1416
1417         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1418                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1419                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1420                 attr->ia_valid);
1421
1422         if (attr->ia_valid & ATTR_SIZE) {
1423                 /* Check new size against VFS/VM file size limit and rlimit */
1424                 rc = inode_newsize_ok(inode, attr->ia_size);
1425                 if (rc)
1426                         RETURN(rc);
1427
1428                 /* The maximum Lustre file size is variable, based on the
1429                  * OST maximum object size and number of stripes.  This
1430                  * needs another check in addition to the VFS check above. */
1431                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1432                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1433                                PFID(&lli->lli_fid), attr->ia_size,
1434                                ll_file_maxbytes(inode));
1435                         RETURN(-EFBIG);
1436                 }
1437
1438                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1439         }
1440
1441         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1442         if (attr->ia_valid & TIMES_SET_FLAGS) {
1443                 if (cfs_curproc_fsuid() != inode->i_uid &&
1444                     !cfs_capable(CFS_CAP_FOWNER))
1445                         RETURN(-EPERM);
1446         }
1447
1448         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1449         if (attr->ia_valid & ATTR_CTIME) {
1450                 attr->ia_ctime = CFS_CURRENT_TIME;
1451                 attr->ia_valid |= ATTR_CTIME_SET;
1452         }
1453         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1454             (attr->ia_valid & ATTR_ATIME)) {
1455                 attr->ia_atime = CFS_CURRENT_TIME;
1456                 attr->ia_valid |= ATTR_ATIME_SET;
1457         }
1458         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1459             (attr->ia_valid & ATTR_MTIME)) {
1460                 attr->ia_mtime = CFS_CURRENT_TIME;
1461                 attr->ia_valid |= ATTR_MTIME_SET;
1462         }
1463
1464         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1465                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1466                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1467                        cfs_time_current_sec());
1468
1469         /* If we are changing file size, file content is modified, flag it. */
1470         if (attr->ia_valid & ATTR_SIZE) {
1471                 spin_lock(&lli->lli_lock);
1472                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1473                 spin_unlock(&lli->lli_lock);
1474         }
1475
1476         /* We always do an MDS RPC, even if we're only changing the size;
1477          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1478
1479         OBD_ALLOC_PTR(op_data);
1480         if (op_data == NULL)
1481                 RETURN(-ENOMEM);
1482
1483         if (!S_ISDIR(inode->i_mode)) {
1484                 if (attr->ia_valid & ATTR_SIZE)
1485                         inode_dio_write_done(inode);
1486                 mutex_unlock(&inode->i_mutex);
1487                 down_write(&lli->lli_trunc_sem);
1488         }
1489
1490         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1491
1492         /* Open epoch for truncate. */
1493         if (exp_connect_som(ll_i2mdexp(inode)) &&
1494             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1495                 op_data->op_flags = MF_EPOCH_OPEN;
1496
1497         rc = ll_md_setattr(dentry, op_data, &mod);
1498         if (rc)
1499                 GOTO(out, rc);
1500
1501         /* RPC to MDT is sent, cancel data modification flag */
1502         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1503                 spin_lock(&lli->lli_lock);
1504                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1505                 spin_unlock(&lli->lli_lock);
1506         }
1507
1508         ll_ioepoch_open(lli, op_data->op_ioepoch);
1509         if (!S_ISREG(inode->i_mode))
1510                 GOTO(out, rc = 0);
1511
1512         if (attr->ia_valid & (ATTR_SIZE |
1513                               ATTR_ATIME | ATTR_ATIME_SET |
1514                               ATTR_MTIME | ATTR_MTIME_SET))
1515                 /* For truncate and utimes sending attributes to OSTs, setting
1516                  * mtime/atime to the past will be performed under PW [0:EOF]
1517                  * extent lock (new_size:EOF for truncate).  It may seem
1518                  * excessive to send mtime/atime updates to OSTs when not
1519                  * setting times to past, but it is necessary due to possible
1520                  * time de-synchronization between MDT inode and OST objects */
1521                 rc = ll_setattr_ost(inode, attr);
1522         EXIT;
1523 out:
1524         if (op_data) {
1525                 if (op_data->op_ioepoch) {
1526                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1527                         if (!rc)
1528                                 rc = rc1;
1529                 }
1530                 ll_finish_md_op_data(op_data);
1531         }
1532         if (!S_ISDIR(inode->i_mode)) {
1533                 up_write(&lli->lli_trunc_sem);
1534                 mutex_lock(&inode->i_mutex);
1535                 if (attr->ia_valid & ATTR_SIZE)
1536                         inode_dio_wait(inode);
1537         }
1538
1539         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1540                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1541
1542         return rc;
1543 }
1544
1545 int ll_setattr(struct dentry *de, struct iattr *attr)
1546 {
1547         int mode = de->d_inode->i_mode;
1548
1549         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1550                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1551                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1552
1553         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1554                                (ATTR_SIZE|ATTR_MODE)) &&
1555             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1556              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1557               !(attr->ia_mode & S_ISGID))))
1558                 attr->ia_valid |= ATTR_FORCE;
1559
1560         if ((mode & S_ISUID) &&
1561             !(attr->ia_mode & S_ISUID) &&
1562             !(attr->ia_valid & ATTR_KILL_SUID))
1563                 attr->ia_valid |= ATTR_KILL_SUID;
1564
1565         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1566             !(attr->ia_mode & S_ISGID) &&
1567             !(attr->ia_valid & ATTR_KILL_SGID))
1568                 attr->ia_valid |= ATTR_KILL_SGID;
1569
1570         return ll_setattr_raw(de, attr);
1571 }
1572
1573 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1574                        __u64 max_age, __u32 flags)
1575 {
1576         struct ll_sb_info *sbi = ll_s2sbi(sb);
1577         struct obd_statfs obd_osfs;
1578         int rc;
1579         ENTRY;
1580
1581         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1582         if (rc) {
1583                 CERROR("md_statfs fails: rc = %d\n", rc);
1584                 RETURN(rc);
1585         }
1586
1587         osfs->os_type = sb->s_magic;
1588
1589         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1590                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1591
1592         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1593                 flags |= OBD_STATFS_NODELAY;
1594
1595         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1596         if (rc) {
1597                 CERROR("obd_statfs fails: rc = %d\n", rc);
1598                 RETURN(rc);
1599         }
1600
1601         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1602                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1603                obd_osfs.os_files);
1604
1605         osfs->os_bsize = obd_osfs.os_bsize;
1606         osfs->os_blocks = obd_osfs.os_blocks;
1607         osfs->os_bfree = obd_osfs.os_bfree;
1608         osfs->os_bavail = obd_osfs.os_bavail;
1609
1610         /* If we don't have as many objects free on the OST as inodes
1611          * on the MDS, we reduce the total number of inodes to
1612          * compensate, so that the "inodes in use" number is correct.
1613          */
1614         if (obd_osfs.os_ffree < osfs->os_ffree) {
1615                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1616                         obd_osfs.os_ffree;
1617                 osfs->os_ffree = obd_osfs.os_ffree;
1618         }
1619
1620         RETURN(rc);
1621 }
1622 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1623 {
1624         struct super_block *sb = de->d_sb;
1625         struct obd_statfs osfs;
1626         int rc;
1627
1628         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1629         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1630
1631         /* Some amount of caching on the client is allowed */
1632         rc = ll_statfs_internal(sb, &osfs,
1633                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1634                                 0);
1635         if (rc)
1636                 return rc;
1637
1638         statfs_unpack(sfs, &osfs);
1639
1640         /* We need to downshift for all 32-bit kernels, because we can't
1641          * tell if the kernel is being called via sys_statfs64() or not.
1642          * Stop before overflowing f_bsize - in which case it is better
1643          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1644         if (sizeof(long) < 8) {
1645                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1646                         sfs->f_bsize <<= 1;
1647
1648                         osfs.os_blocks >>= 1;
1649                         osfs.os_bfree >>= 1;
1650                         osfs.os_bavail >>= 1;
1651                 }
1652         }
1653
1654         sfs->f_blocks = osfs.os_blocks;
1655         sfs->f_bfree = osfs.os_bfree;
1656         sfs->f_bavail = osfs.os_bavail;
1657
1658         return 0;
1659 }
1660
1661 void ll_inode_size_lock(struct inode *inode)
1662 {
1663         struct ll_inode_info *lli;
1664
1665         LASSERT(!S_ISDIR(inode->i_mode));
1666
1667         lli = ll_i2info(inode);
1668         LASSERT(lli->lli_size_sem_owner != current);
1669         down(&lli->lli_size_sem);
1670         LASSERT(lli->lli_size_sem_owner == NULL);
1671         lli->lli_size_sem_owner = current;
1672 }
1673
1674 void ll_inode_size_unlock(struct inode *inode)
1675 {
1676         struct ll_inode_info *lli;
1677
1678         lli = ll_i2info(inode);
1679         LASSERT(lli->lli_size_sem_owner == current);
1680         lli->lli_size_sem_owner = NULL;
1681         up(&lli->lli_size_sem);
1682 }
1683
1684 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1685 {
1686         struct ll_inode_info *lli = ll_i2info(inode);
1687         struct mdt_body *body = md->body;
1688         struct lov_stripe_md *lsm = md->lsm;
1689         struct ll_sb_info *sbi = ll_i2sbi(inode);
1690
1691         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1692         if (lsm != NULL) {
1693                 if (!lli->lli_has_smd &&
1694                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1695                         cl_file_inode_init(inode, md);
1696
1697                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1698                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1699                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1700         }
1701
1702         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1703                 if (body->valid & OBD_MD_FLRMTPERM)
1704                         ll_update_remote_perm(inode, md->remote_perm);
1705         }
1706 #ifdef CONFIG_FS_POSIX_ACL
1707         else if (body->valid & OBD_MD_FLACL) {
1708                 spin_lock(&lli->lli_lock);
1709                 if (lli->lli_posix_acl)
1710                         posix_acl_release(lli->lli_posix_acl);
1711                 lli->lli_posix_acl = md->posix_acl;
1712                 spin_unlock(&lli->lli_lock);
1713         }
1714 #endif
1715         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1716         inode->i_generation = cl_fid_build_gen(&body->fid1);
1717
1718         if (body->valid & OBD_MD_FLATIME) {
1719                 if (body->atime > LTIME_S(inode->i_atime))
1720                         LTIME_S(inode->i_atime) = body->atime;
1721                 lli->lli_lvb.lvb_atime = body->atime;
1722         }
1723         if (body->valid & OBD_MD_FLMTIME) {
1724                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1725                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1726                                "to "LPU64"\n", inode->i_ino,
1727                                LTIME_S(inode->i_mtime), body->mtime);
1728                         LTIME_S(inode->i_mtime) = body->mtime;
1729                 }
1730                 lli->lli_lvb.lvb_mtime = body->mtime;
1731         }
1732         if (body->valid & OBD_MD_FLCTIME) {
1733                 if (body->ctime > LTIME_S(inode->i_ctime))
1734                         LTIME_S(inode->i_ctime) = body->ctime;
1735                 lli->lli_lvb.lvb_ctime = body->ctime;
1736         }
1737         if (body->valid & OBD_MD_FLMODE)
1738                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1739         if (body->valid & OBD_MD_FLTYPE)
1740                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1741         LASSERT(inode->i_mode != 0);
1742         if (S_ISREG(inode->i_mode)) {
1743                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1744         } else {
1745                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1746         }
1747         if (body->valid & OBD_MD_FLUID)
1748                 inode->i_uid = body->uid;
1749         if (body->valid & OBD_MD_FLGID)
1750                 inode->i_gid = body->gid;
1751         if (body->valid & OBD_MD_FLFLAGS)
1752                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1753         if (body->valid & OBD_MD_FLNLINK)
1754                 set_nlink(inode, body->nlink);
1755         if (body->valid & OBD_MD_FLRDEV)
1756                 inode->i_rdev = old_decode_dev(body->rdev);
1757
1758         if (body->valid & OBD_MD_FLID) {
1759                 /* FID shouldn't be changed! */
1760                 if (fid_is_sane(&lli->lli_fid)) {
1761                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1762                                  "Trying to change FID "DFID
1763                                  " to the "DFID", inode %lu/%u(%p)\n",
1764                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1765                                  inode->i_ino, inode->i_generation, inode);
1766                 } else
1767                         lli->lli_fid = body->fid1;
1768         }
1769
1770         LASSERT(fid_seq(&lli->lli_fid) != 0);
1771
1772         if (body->valid & OBD_MD_FLSIZE) {
1773                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1774                     S_ISREG(inode->i_mode)) {
1775                         struct lustre_handle lockh;
1776                         ldlm_mode_t mode;
1777
1778                         /* As it is possible a blocking ast has been processed
1779                          * by this time, we need to check there is an UPDATE
1780                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1781                          * it. */
1782                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1783                                                &lockh, LDLM_FL_CBPENDING);
1784                         if (mode) {
1785                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1786                                                       LLIF_EPOCH_PENDING |
1787                                                       LLIF_SOM_DIRTY)) {
1788                                         CERROR("ino %lu flags %u still has "
1789                                                "size authority! do not trust "
1790                                                "the size got from MDS\n",
1791                                                inode->i_ino, lli->lli_flags);
1792                                 } else {
1793                                         /* Use old size assignment to avoid
1794                                          * deadlock bz14138 & bz14326 */
1795                                         i_size_write(inode, body->size);
1796                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1797                                 }
1798                                 ldlm_lock_decref(&lockh, mode);
1799                         }
1800                 } else {
1801                         /* Use old size assignment to avoid
1802                          * deadlock bz14138 & bz14326 */
1803                         i_size_write(inode, body->size);
1804
1805                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1806                                inode->i_ino, (unsigned long long)body->size);
1807                 }
1808
1809                 if (body->valid & OBD_MD_FLBLOCKS)
1810                         inode->i_blocks = body->blocks;
1811         }
1812
1813         if (body->valid & OBD_MD_FLMDSCAPA) {
1814                 LASSERT(md->mds_capa);
1815                 ll_add_capa(inode, md->mds_capa);
1816         }
1817         if (body->valid & OBD_MD_FLOSSCAPA) {
1818                 LASSERT(md->oss_capa);
1819                 ll_add_capa(inode, md->oss_capa);
1820         }
1821 }
1822
1823 void ll_read_inode2(struct inode *inode, void *opaque)
1824 {
1825         struct lustre_md *md = opaque;
1826         struct ll_inode_info *lli = ll_i2info(inode);
1827         ENTRY;
1828
1829         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1830                PFID(&lli->lli_fid), inode);
1831
1832         LASSERT(!lli->lli_has_smd);
1833
1834         /* Core attributes from the MDS first.  This is a new inode, and
1835          * the VFS doesn't zero times in the core inode so we have to do
1836          * it ourselves.  They will be overwritten by either MDS or OST
1837          * attributes - we just need to make sure they aren't newer. */
1838         LTIME_S(inode->i_mtime) = 0;
1839         LTIME_S(inode->i_atime) = 0;
1840         LTIME_S(inode->i_ctime) = 0;
1841         inode->i_rdev = 0;
1842         ll_update_inode(inode, md);
1843
1844         /* OIDEBUG(inode); */
1845
1846         /* initializing backing dev info. */
1847         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1848
1849
1850         if (S_ISREG(inode->i_mode)) {
1851                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1852                 inode->i_op = &ll_file_inode_operations;
1853                 inode->i_fop = sbi->ll_fop;
1854                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1855                 EXIT;
1856         } else if (S_ISDIR(inode->i_mode)) {
1857                 inode->i_op = &ll_dir_inode_operations;
1858                 inode->i_fop = &ll_dir_operations;
1859                 EXIT;
1860         } else if (S_ISLNK(inode->i_mode)) {
1861                 inode->i_op = &ll_fast_symlink_inode_operations;
1862                 EXIT;
1863         } else {
1864                 inode->i_op = &ll_special_inode_operations;
1865
1866                 init_special_inode(inode, inode->i_mode,
1867                                    inode->i_rdev);
1868
1869                 EXIT;
1870         }
1871 }
1872
1873 void ll_delete_inode(struct inode *inode)
1874 {
1875         struct cl_inode_info *lli = cl_i2info(inode);
1876         ENTRY;
1877
1878         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1879                 /* discard all dirty pages before truncating them, required by
1880                  * osc_extent implementation at LU-1030. */
1881                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1882
1883         truncate_inode_pages(&inode->i_data, 0);
1884
1885         /* Workaround for LU-118 */
1886         if (inode->i_data.nrpages) {
1887                 TREE_READ_LOCK_IRQ(&inode->i_data);
1888                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1889                 LASSERTF(inode->i_data.nrpages == 0,
1890                          "inode=%lu/%u(%p) nrpages=%lu, see "
1891                          "http://jira.whamcloud.com/browse/LU-118\n",
1892                          inode->i_ino, inode->i_generation, inode,
1893                          inode->i_data.nrpages);
1894         }
1895         /* Workaround end */
1896
1897 #ifdef HAVE_SBOPS_EVICT_INODE
1898         ll_clear_inode(inode);
1899 #endif
1900         clear_inode(inode);
1901
1902         EXIT;
1903 }
1904
1905 int ll_iocontrol(struct inode *inode, struct file *file,
1906                  unsigned int cmd, unsigned long arg)
1907 {
1908         struct ll_sb_info *sbi = ll_i2sbi(inode);
1909         struct ptlrpc_request *req = NULL;
1910         int rc, flags = 0;
1911         ENTRY;
1912
1913         switch(cmd) {
1914         case FSFILT_IOC_GETFLAGS: {
1915                 struct mdt_body *body;
1916                 struct md_op_data *op_data;
1917
1918                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1919                                              0, 0, LUSTRE_OPC_ANY,
1920                                              NULL);
1921                 if (IS_ERR(op_data))
1922                         RETURN(PTR_ERR(op_data));
1923
1924                 op_data->op_valid = OBD_MD_FLFLAGS;
1925                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1926                 ll_finish_md_op_data(op_data);
1927                 if (rc) {
1928                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1929                         RETURN(-abs(rc));
1930                 }
1931
1932                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1933
1934                 flags = body->flags;
1935
1936                 ptlrpc_req_finished(req);
1937
1938                 RETURN(put_user(flags, (int *)arg));
1939         }
1940         case FSFILT_IOC_SETFLAGS: {
1941                 struct lov_stripe_md *lsm;
1942                 struct obd_info oinfo = { { { 0 } } };
1943                 struct md_op_data *op_data;
1944
1945                 if (get_user(flags, (int *)arg))
1946                         RETURN(-EFAULT);
1947
1948                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1949                                              LUSTRE_OPC_ANY, NULL);
1950                 if (IS_ERR(op_data))
1951                         RETURN(PTR_ERR(op_data));
1952
1953                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1954                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1955                 rc = md_setattr(sbi->ll_md_exp, op_data,
1956                                 NULL, 0, NULL, 0, &req, NULL);
1957                 ll_finish_md_op_data(op_data);
1958                 ptlrpc_req_finished(req);
1959                 if (rc)
1960                         RETURN(rc);
1961
1962                 inode->i_flags = ll_ext_to_inode_flags(flags);
1963
1964                 lsm = ccc_inode_lsm_get(inode);
1965                 if (lsm == NULL)
1966                         RETURN(0);
1967
1968                 OBDO_ALLOC(oinfo.oi_oa);
1969                 if (!oinfo.oi_oa) {
1970                         ccc_inode_lsm_put(inode, lsm);
1971                         RETURN(-ENOMEM);
1972                 }
1973                 oinfo.oi_md = lsm;
1974                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1975                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1976                 oinfo.oi_oa->o_flags = flags;
1977                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1978                                        OBD_MD_FLGROUP;
1979                 oinfo.oi_capa = ll_mdscapa_get(inode);
1980                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1981                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1982                 capa_put(oinfo.oi_capa);
1983                 OBDO_FREE(oinfo.oi_oa);
1984                 ccc_inode_lsm_put(inode, lsm);
1985
1986                 if (rc && rc != -EPERM && rc != -EACCES)
1987                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1988
1989                 RETURN(rc);
1990         }
1991         default:
1992                 RETURN(-ENOSYS);
1993         }
1994
1995         RETURN(0);
1996 }
1997
1998 int ll_flush_ctx(struct inode *inode)
1999 {
2000         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2001
2002         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2003
2004         obd_set_info_async(NULL, sbi->ll_md_exp,
2005                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2006                            0, NULL, NULL);
2007         obd_set_info_async(NULL, sbi->ll_dt_exp,
2008                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2009                            0, NULL, NULL);
2010         return 0;
2011 }
2012
2013 /* umount -f client means force down, don't save state */
2014 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2015 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2016 {
2017         struct super_block *sb = vfsmnt->mnt_sb;
2018 #else
2019 void ll_umount_begin(struct super_block *sb)
2020 {
2021 #endif
2022         struct ll_sb_info *sbi = ll_s2sbi(sb);
2023         struct obd_device *obd;
2024         struct obd_ioctl_data *ioc_data;
2025         ENTRY;
2026
2027 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2028         if (!(flags & MNT_FORCE)) {
2029                 EXIT;
2030                 return;
2031         }
2032 #endif
2033
2034         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2035                sb->s_count, atomic_read(&sb->s_active));
2036
2037         obd = class_exp2obd(sbi->ll_md_exp);
2038         if (obd == NULL) {
2039                 CERROR("Invalid MDC connection handle "LPX64"\n",
2040                        sbi->ll_md_exp->exp_handle.h_cookie);
2041                 EXIT;
2042                 return;
2043         }
2044         obd->obd_force = 1;
2045
2046         obd = class_exp2obd(sbi->ll_dt_exp);
2047         if (obd == NULL) {
2048                 CERROR("Invalid LOV connection handle "LPX64"\n",
2049                        sbi->ll_dt_exp->exp_handle.h_cookie);
2050                 EXIT;
2051                 return;
2052         }
2053         obd->obd_force = 1;
2054
2055         OBD_ALLOC_PTR(ioc_data);
2056         if (ioc_data) {
2057                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2058                               sizeof ioc_data, ioc_data, NULL);
2059
2060                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2061                               sizeof ioc_data, ioc_data, NULL);
2062
2063                 OBD_FREE_PTR(ioc_data);
2064         }
2065
2066
2067         /* Really, we'd like to wait until there are no requests outstanding,
2068          * and then continue.  For now, we just invalidate the requests,
2069          * schedule() and sleep one second if needed, and hope.
2070          */
2071         cfs_schedule();
2072 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2073         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2074                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2075                                                    cfs_time_seconds(1));
2076                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2077                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2078                                       "may try to umount it a bit later\n",
2079                                       atomic_read(&vfsmnt->mnt_count));
2080         }
2081 #endif
2082
2083         EXIT;
2084 }
2085
2086 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2087 {
2088         struct ll_sb_info *sbi = ll_s2sbi(sb);
2089         char *profilenm = get_profile_name(sb);
2090         int err;
2091         __u32 read_only;
2092
2093         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2094                 read_only = *flags & MS_RDONLY;
2095                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2096                                          sizeof(KEY_READ_ONLY),
2097                                          KEY_READ_ONLY, sizeof(read_only),
2098                                          &read_only, NULL);
2099                 if (err) {
2100                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2101                                       profilenm, read_only ?
2102                                       "read-only" : "read-write", err);
2103                         return err;
2104                 }
2105
2106                 if (read_only)
2107                         sb->s_flags |= MS_RDONLY;
2108                 else
2109                         sb->s_flags &= ~MS_RDONLY;
2110
2111                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2112                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2113                                       read_only ?  "read-only" : "read-write");
2114         }
2115         return 0;
2116 }
2117
2118 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2119                   struct super_block *sb, struct lookup_intent *it)
2120 {
2121         struct ll_sb_info *sbi = NULL;
2122         struct lustre_md md;
2123         int rc;
2124         ENTRY;
2125
2126         LASSERT(*inode || sb);
2127         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2128         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2129                               sbi->ll_md_exp, &md);
2130         if (rc)
2131                 RETURN(rc);
2132
2133         if (*inode) {
2134                 ll_update_inode(*inode, &md);
2135         } else {
2136                 LASSERT(sb != NULL);
2137
2138                 /*
2139                  * At this point server returns to client's same fid as client
2140                  * generated for creating. So using ->fid1 is okay here.
2141                  */
2142                 LASSERT(fid_is_sane(&md.body->fid1));
2143
2144                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2145                 if (*inode == NULL || IS_ERR(*inode)) {
2146 #ifdef CONFIG_FS_POSIX_ACL
2147                         if (md.posix_acl) {
2148                                 posix_acl_release(md.posix_acl);
2149                                 md.posix_acl = NULL;
2150                         }
2151 #endif
2152                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2153                         *inode = NULL;
2154                         CERROR("new_inode -fatal: rc %d\n", rc);
2155                         GOTO(out, rc);
2156                 }
2157         }
2158
2159         /* Handling piggyback layout lock.
2160          * Layout lock can be piggybacked by getattr and open request.
2161          * The lsm can be applied to inode only if it comes with a layout lock
2162          * otherwise correct layout may be overwritten, for example:
2163          * 1. proc1: mdt returns a lsm but not granting layout
2164          * 2. layout was changed by another client
2165          * 3. proc2: refresh layout and layout lock granted
2166          * 4. proc1: to apply a stale layout */
2167         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2168                 struct lustre_handle lockh;
2169                 struct ldlm_lock *lock;
2170
2171                 lockh.cookie = it->d.lustre.it_lock_handle;
2172                 lock = ldlm_handle2lock(&lockh);
2173                 LASSERT(lock != NULL);
2174                 if (ldlm_has_layout(lock)) {
2175                         struct cl_object_conf conf;
2176
2177                         memset(&conf, 0, sizeof(conf));
2178                         conf.coc_opc = OBJECT_CONF_SET;
2179                         conf.coc_inode = *inode;
2180                         conf.coc_lock = lock;
2181                         conf.u.coc_md = &md;
2182                         (void)ll_layout_conf(*inode, &conf);
2183                 }
2184                 LDLM_LOCK_PUT(lock);
2185         }
2186
2187 out:
2188         if (md.lsm != NULL)
2189                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2190         md_free_lustre_md(sbi->ll_md_exp, &md);
2191         RETURN(rc);
2192 }
2193
2194 int ll_obd_statfs(struct inode *inode, void *arg)
2195 {
2196         struct ll_sb_info *sbi = NULL;
2197         struct obd_export *exp;
2198         char *buf = NULL;
2199         struct obd_ioctl_data *data = NULL;
2200         __u32 type;
2201         __u32 flags;
2202         int len = 0, rc;
2203
2204         if (!inode || !(sbi = ll_i2sbi(inode)))
2205                 GOTO(out_statfs, rc = -EINVAL);
2206
2207         rc = obd_ioctl_getdata(&buf, &len, arg);
2208         if (rc)
2209                 GOTO(out_statfs, rc);
2210
2211         data = (void*)buf;
2212         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2213             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2214                 GOTO(out_statfs, rc = -EINVAL);
2215
2216         if (data->ioc_inllen1 != sizeof(__u32) ||
2217             data->ioc_inllen2 != sizeof(__u32) ||
2218             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2219             data->ioc_plen2 != sizeof(struct obd_uuid))
2220                 GOTO(out_statfs, rc = -EINVAL);
2221
2222         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2223         if (type & LL_STATFS_LMV)
2224                 exp = sbi->ll_md_exp;
2225         else if (type & LL_STATFS_LOV)
2226                 exp = sbi->ll_dt_exp;
2227         else
2228                 GOTO(out_statfs, rc = -ENODEV);
2229
2230         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2231         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2232         if (rc)
2233                 GOTO(out_statfs, rc);
2234 out_statfs:
2235         if (buf)
2236                 obd_ioctl_freedata(buf, len);
2237         return rc;
2238 }
2239
2240 int ll_process_config(struct lustre_cfg *lcfg)
2241 {
2242         char *ptr;
2243         void *sb;
2244         struct lprocfs_static_vars lvars;
2245         unsigned long x;
2246         int rc = 0;
2247
2248         lprocfs_llite_init_vars(&lvars);
2249
2250         /* The instance name contains the sb: lustre-client-aacfe000 */
2251         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2252         if (!ptr || !*(++ptr))
2253                 return -EINVAL;
2254         if (sscanf(ptr, "%lx", &x) != 1)
2255                 return -EINVAL;
2256         sb = (void *)x;
2257         /* This better be a real Lustre superblock! */
2258         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2259
2260         /* Note we have not called client_common_fill_super yet, so
2261            proc fns must be able to handle that! */
2262         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2263                                       lcfg, sb);
2264         if (rc > 0)
2265                 rc = 0;
2266         return(rc);
2267 }
2268
2269 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2270 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2271                                        struct inode *i1, struct inode *i2,
2272                                        const char *name, int namelen,
2273                                        int mode, __u32 opc, void *data)
2274 {
2275         LASSERT(i1 != NULL);
2276
2277         if (namelen > ll_i2sbi(i1)->ll_namelen)
2278                 return ERR_PTR(-ENAMETOOLONG);
2279
2280         if (op_data == NULL)
2281                 OBD_ALLOC_PTR(op_data);
2282
2283         if (op_data == NULL)
2284                 return ERR_PTR(-ENOMEM);
2285
2286         ll_i2gids(op_data->op_suppgids, i1, i2);
2287         op_data->op_fid1 = *ll_inode2fid(i1);
2288         op_data->op_capa1 = ll_mdscapa_get(i1);
2289
2290         if (i2) {
2291                 op_data->op_fid2 = *ll_inode2fid(i2);
2292                 op_data->op_capa2 = ll_mdscapa_get(i2);
2293         } else {
2294                 fid_zero(&op_data->op_fid2);
2295                 op_data->op_capa2 = NULL;
2296         }
2297
2298         op_data->op_name = name;
2299         op_data->op_namelen = namelen;
2300         op_data->op_mode = mode;
2301         op_data->op_mod_time = cfs_time_current_sec();
2302         op_data->op_fsuid = cfs_curproc_fsuid();
2303         op_data->op_fsgid = cfs_curproc_fsgid();
2304         op_data->op_cap = cfs_curproc_cap_pack();
2305         op_data->op_bias = 0;
2306         op_data->op_cli_flags = 0;
2307         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2308              filename_is_volatile(name, namelen, NULL))
2309                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2310         op_data->op_opc = opc;
2311         op_data->op_mds = 0;
2312         op_data->op_data = data;
2313
2314         /* If the file is being opened after mknod() (normally due to NFS)
2315          * try to use the default stripe data from parent directory for
2316          * allocating OST objects.  Try to pass the parent FID to MDS. */
2317         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2318             !ll_i2info(i2)->lli_has_smd) {
2319                 struct ll_inode_info *lli = ll_i2info(i2);
2320
2321                 spin_lock(&lli->lli_lock);
2322                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2323                         op_data->op_fid1 = lli->lli_pfid;
2324                 spin_unlock(&lli->lli_lock);
2325                 /** We ignore parent's capability temporary. */
2326         }
2327
2328         /* When called by ll_setattr_raw, file is i1. */
2329         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2330                 op_data->op_bias |= MDS_DATA_MODIFIED;
2331
2332         return op_data;
2333 }
2334
2335 void ll_finish_md_op_data(struct md_op_data *op_data)
2336 {
2337         capa_put(op_data->op_capa1);
2338         capa_put(op_data->op_capa2);
2339         OBD_FREE_PTR(op_data);
2340 }
2341
2342 #ifdef HAVE_SUPEROPS_USE_DENTRY
2343 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2344 #else
2345 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2346 #endif
2347 {
2348         struct ll_sb_info *sbi;
2349
2350 #ifdef HAVE_SUPEROPS_USE_DENTRY
2351         LASSERT((seq != NULL) && (dentry != NULL));
2352         sbi = ll_s2sbi(dentry->d_sb);
2353 #else
2354         LASSERT((seq != NULL) && (vfs != NULL));
2355         sbi = ll_s2sbi(vfs->mnt_sb);
2356 #endif
2357
2358         if (sbi->ll_flags & LL_SBI_NOLCK)
2359                 seq_puts(seq, ",nolock");
2360
2361         if (sbi->ll_flags & LL_SBI_FLOCK)
2362                 seq_puts(seq, ",flock");
2363
2364         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2365                 seq_puts(seq, ",localflock");
2366
2367         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2368                 seq_puts(seq, ",user_xattr");
2369
2370         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2371                 seq_puts(seq, ",lazystatfs");
2372
2373         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2374                 seq_puts(seq, ",user_fid2path");
2375
2376         RETURN(0);
2377 }
2378
2379 /**
2380  * Get obd name by cmd, and copy out to user space
2381  */
2382 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2383 {
2384         struct ll_sb_info *sbi = ll_i2sbi(inode);
2385         struct obd_device *obd;
2386         ENTRY;
2387
2388         if (cmd == OBD_IOC_GETDTNAME)
2389                 obd = class_exp2obd(sbi->ll_dt_exp);
2390         else if (cmd == OBD_IOC_GETMDNAME)
2391                 obd = class_exp2obd(sbi->ll_md_exp);
2392         else
2393                 RETURN(-EINVAL);
2394
2395         if (!obd)
2396                 RETURN(-ENOENT);
2397
2398         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2399                              strlen(obd->obd_name) + 1))
2400                 RETURN(-EFAULT);
2401
2402         RETURN(0);
2403 }
2404
2405 /**
2406  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2407  * fsname will be returned in this buffer; otherwise, a static buffer will be
2408  * used to store the fsname and returned to caller.
2409  */
2410 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2411 {
2412         static char fsname_static[MTI_NAME_MAXLEN];
2413         struct lustre_sb_info *lsi = s2lsi(sb);
2414         char *ptr;
2415         int len;
2416
2417         if (buf == NULL) {
2418                 /* this means the caller wants to use static buffer
2419                  * and it doesn't care about race. Usually this is
2420                  * in error reporting path */
2421                 buf = fsname_static;
2422                 buflen = sizeof(fsname_static);
2423         }
2424
2425         len = strlen(lsi->lsi_lmd->lmd_profile);
2426         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2427         if (ptr && (strcmp(ptr, "-client") == 0))
2428                 len -= 7;
2429
2430         if (unlikely(len >= buflen))
2431                 len = buflen - 1;
2432         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2433         buf[len] = '\0';
2434
2435         return buf;
2436 }
2437
2438 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2439 {
2440         char *path = NULL;
2441
2442 #ifdef HAVE_FS_STRUCT_USE_PATH
2443         struct path p;
2444
2445         p.dentry = dentry;
2446         p.mnt = current->fs->root.mnt;
2447         path_get(&p);
2448         path = d_path(&p, buf, bufsize);
2449         path_put(&p);
2450 #else
2451         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2452 #endif
2453
2454         return path;
2455 }
2456
2457 void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
2458 {
2459         char *buf, *path = NULL;
2460         struct dentry *dentry = NULL;
2461         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2462
2463         /* this can be called inside spin lock so use GFP_ATOMIC. */
2464         buf = (char *)__get_free_page(GFP_ATOMIC);
2465         if (buf != NULL) {
2466                 dentry = d_find_alias(page->mapping->host);
2467                 if (dentry != NULL)
2468                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2469         }
2470
2471         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2472               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2473               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2474               PFID(&obj->cob_header.coh_lu.loh_fid),
2475               (path && !IS_ERR(path)) ? path : "", ioret);
2476
2477         if (dentry != NULL)
2478                 dput(dentry);
2479
2480         if (buf != NULL)
2481                 free_page((unsigned long)buf);
2482 }