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, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/version.h>
  47 #include <linux/mm.h>
  48 #include <linux/user_namespace.h>
  49 #ifdef HAVE_UIDGID_HEADER
  50 # include <linux/uidgid.h>
  51 #endif
  52
  53 #include <lustre_ioctl.h>
  54 #include <lustre_ha.h>
  55 #include <lustre_dlm.h>
  56 #include <lprocfs_status.h>
  57 #include <lustre_disk.h>
  58 #include <lustre_param.h>
  59 #include <lustre_log.h>
  60 #include <cl_object.h>
  61 #include <obd_cksum.h>
  62 #include "llite_internal.h"
  63
  64 struct kmem_cache *ll_file_data_slab;
  65
  66 static struct list_head ll_super_blocks = LIST_HEAD_INIT(ll_super_blocks);
  67 static DEFINE_SPINLOCK(ll_sb_lock);
  68
  69 #ifndef log2
  70 #define log2(n) ffz(~(n))
  71 #endif
  72
  73 static struct ll_sb_info *ll_init_sbi(void)
  74 {
  75         struct ll_sb_info *sbi = NULL;
  76         unsigned long pages;
  77         unsigned long lru_page_max;
  78         struct sysinfo si;
  79         class_uuid_t uuid;
  80         int i;
  81         ENTRY;
  82
  83         OBD_ALLOC_PTR(sbi);
  84         if (sbi == NULL)
  85                 RETURN(NULL);
  86
  87         spin_lock_init(&sbi->ll_lock);
  88         mutex_init(&sbi->ll_lco.lco_lock);
  89         spin_lock_init(&sbi->ll_pp_extent_lock);
  90         spin_lock_init(&sbi->ll_process_lock);
  91         sbi->ll_rw_stats_on = 0;
  92
  93         si_meminfo(&si);
  94         pages = si.totalram - si.totalhigh;
  95         lru_page_max = pages / 2;
  96
  97         /* initialize ll_cache data */
  98         sbi->ll_cache = cl_cache_init(lru_page_max);
  99         if (sbi->ll_cache == NULL) {
 100                 OBD_FREE(sbi, sizeof(*sbi));
 101                 RETURN(NULL);
 102         }
 103
 104         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 105                                            SBI_DEFAULT_READAHEAD_MAX);
 106         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 107         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 108                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 109         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 110         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 111
 112         ll_generate_random_uuid(uuid);
 113         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 114         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 115
 116         spin_lock(&ll_sb_lock);
 117         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 118         spin_unlock(&ll_sb_lock);
 119
 120         sbi->ll_flags |= LL_SBI_VERBOSE;
 121 #ifdef ENABLE_CHECKSUM
 122         sbi->ll_flags |= LL_SBI_CHECKSUM;
 123 #endif
 124
 125 #ifdef HAVE_LRU_RESIZE_SUPPORT
 126         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 127 #endif
 128
 129         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 130                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 131                                pp_r_hist.oh_lock);
 132                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 133                                pp_w_hist.oh_lock);
 134         }
 135
 136         /* metadata statahead is enabled by default */
 137         sbi->ll_sa_max = LL_SA_RPC_DEF;
 138         atomic_set(&sbi->ll_sa_total, 0);
 139         atomic_set(&sbi->ll_sa_wrong, 0);
 140         atomic_set(&sbi->ll_sa_running, 0);
 141         atomic_set(&sbi->ll_agl_total, 0);
 142         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 143
 144         /* root squash */
 145         sbi->ll_squash.rsi_uid = 0;
 146         sbi->ll_squash.rsi_gid = 0;
 147         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 148         init_rwsem(&sbi->ll_squash.rsi_sem);
 149
 150         RETURN(sbi);
 151 }
 152
 153 static void ll_free_sbi(struct super_block *sb)
 154 {
 155         struct ll_sb_info *sbi = ll_s2sbi(sb);
 156         ENTRY;
 157
 158         if (sbi != NULL) {
 159                 spin_lock(&ll_sb_lock);
 160                 list_del(&sbi->ll_list);
 161                 spin_unlock(&ll_sb_lock);
 162                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 163                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 164                 if (sbi->ll_cache != NULL) {
 165                         cl_cache_decref(sbi->ll_cache);
 166                         sbi->ll_cache = NULL;
 167                 }
 168                 OBD_FREE(sbi, sizeof(*sbi));
 169         }
 170         EXIT;
 171 }
 172
 173 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 174                                     struct vfsmount *mnt)
 175 {
 176         struct inode *root = NULL;
 177         struct ll_sb_info *sbi = ll_s2sbi(sb);
 178         struct obd_device *obd;
 179         struct obd_statfs *osfs = NULL;
 180         struct ptlrpc_request *request = NULL;
 181         struct obd_connect_data *data = NULL;
 182         struct obd_uuid *uuid;
 183         struct md_op_data *op_data;
 184         struct lustre_md lmd;
 185         u64 valid;
 186         int size, err, checksum;
 187         ENTRY;
 188
 189         obd = class_name2obd(md);
 190         if (!obd) {
 191                 CERROR("MD %s: not setup or attached\n", md);
 192                 RETURN(-EINVAL);
 193         }
 194
 195         OBD_ALLOC_PTR(data);
 196         if (data == NULL)
 197                 RETURN(-ENOMEM);
 198
 199         OBD_ALLOC_PTR(osfs);
 200         if (osfs == NULL) {
 201                 OBD_FREE_PTR(data);
 202                 RETURN(-ENOMEM);
 203         }
 204
 205         /* indicate the features supported by this client */
 206         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 207                                   OBD_CONNECT_ATTRFID  |
 208                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 209                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 210                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 211                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 212                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 213                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 214                                   OBD_CONNECT_EINPROGRESS |
 215                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 216                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 217                                   OBD_CONNECT_MAX_EASIZE |
 218                                   OBD_CONNECT_FLOCK_DEAD |
 219                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 220                                   OBD_CONNECT_OPEN_BY_FID |
 221                                   OBD_CONNECT_DIR_STRIPE;
 222
 223 #ifdef HAVE_LRU_RESIZE_SUPPORT
 224         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 225                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 226 #endif
 227 #ifdef CONFIG_FS_POSIX_ACL
 228         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 229 #endif
 230
 231         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 232                 /* flag mdc connection as lightweight, only used for test
 233                  * purpose, use with care */
 234                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 235
 236         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 237         data->ocd_version = LUSTRE_VERSION_CODE;
 238
 239         if (sb->s_flags & MS_RDONLY)
 240                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 241         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 242                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 243
 244 #ifdef HAVE_MS_FLOCK_LOCK
 245         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 246         sb->s_flags |= MS_FLOCK_LOCK;
 247 #endif
 248 #ifdef MS_HAS_NEW_AOPS
 249         sb->s_flags |= MS_HAS_NEW_AOPS;
 250 #endif
 251
 252         if (sbi->ll_flags & LL_SBI_FLOCK)
 253                 sbi->ll_fop = &ll_file_operations_flock;
 254         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 255                 sbi->ll_fop = &ll_file_operations;
 256         else
 257                 sbi->ll_fop = &ll_file_operations_noflock;
 258
 259         /* real client */
 260         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 261         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 262                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 263
 264         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 265
 266         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 267         if (err == -EBUSY) {
 268                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 269                                    "recovery, of which this client is not a "
 270                                    "part. Please wait for recovery to complete,"
 271                                    " abort, or time out.\n", md);
 272                 GOTO(out, err);
 273         } else if (err) {
 274                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 275                 GOTO(out, err);
 276         }
 277
 278         sbi->ll_md_exp->exp_connect_data = *data;
 279
 280         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 281                            LUSTRE_SEQ_METADATA);
 282         if (err) {
 283                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 284                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 285                 GOTO(out_md, err);
 286         }
 287
 288         /* For mount, we only need fs info from MDT0, and also in DNE, it
 289          * can make sure the client can be mounted as long as MDT0 is
 290          * avaible */
 291         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 292                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 293                         OBD_STATFS_FOR_MDT0);
 294         if (err)
 295                 GOTO(out_md_fid, err);
 296
 297         /* This needs to be after statfs to ensure connect has finished.
 298          * Note that "data" does NOT contain the valid connect reply.
 299          * If connecting to a 1.8 server there will be no LMV device, so
 300          * we can access the MDC export directly and exp_connect_flags will
 301          * be non-zero, but if accessing an upgraded 2.1 server it will
 302          * have the correct flags filled in.
 303          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 304         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 305         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 306             valid != CLIENT_CONNECT_MDT_REQD) {
 307                 char *buf;
 308
 309                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 310                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 311                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 312                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 313                                    "feature(s) needed for correct operation "
 314                                    "of this client (%s). Please upgrade "
 315                                    "server or downgrade client.\n",
 316                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 317                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 318                 GOTO(out_md_fid, err = -EPROTO);
 319         }
 320
 321         size = sizeof(*data);
 322         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 323                            KEY_CONN_DATA,  &size, data);
 324         if (err) {
 325                 CERROR("%s: Get connect data failed: rc = %d\n",
 326                        sbi->ll_md_exp->exp_obd->obd_name, err);
 327                 GOTO(out_md_fid, err);
 328         }
 329
 330         LASSERT(osfs->os_bsize);
 331         sb->s_blocksize = osfs->os_bsize;
 332         sb->s_blocksize_bits = log2(osfs->os_bsize);
 333         sb->s_magic = LL_SUPER_MAGIC;
 334         sb->s_maxbytes = MAX_LFS_FILESIZE;
 335         sbi->ll_namelen = osfs->os_namelen;
 336
 337         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 338             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 339                 LCONSOLE_INFO("Disabling user_xattr feature because "
 340                               "it is not supported on the server\n");
 341                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 342         }
 343
 344         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 345 #ifdef MS_POSIXACL
 346                 sb->s_flags |= MS_POSIXACL;
 347 #endif
 348                 sbi->ll_flags |= LL_SBI_ACL;
 349         } else {
 350                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 351 #ifdef MS_POSIXACL
 352                 sb->s_flags &= ~MS_POSIXACL;
 353 #endif
 354                 sbi->ll_flags &= ~LL_SBI_ACL;
 355         }
 356
 357         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 358                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 359                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 360                         LCONSOLE_INFO("client is set as remote by default.\n");
 361                 }
 362         } else {
 363                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 364                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 365                         LCONSOLE_INFO("client claims to be remote, but server "
 366                                       "rejected, forced to be local.\n");
 367                 }
 368         }
 369
 370         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 371                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 372
 373         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 374                 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
 375         else
 376                 sbi->ll_md_brw_pages = 1;
 377
 378         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 379                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 380
 381         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 382                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 383                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 384                                       "unknown maximum xattr size.\n", dt);
 385                 } else {
 386                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 387                         sbi->ll_xattr_cache_enabled = 1;
 388                 }
 389         }
 390
 391         obd = class_name2obd(dt);
 392         if (!obd) {
 393                 CERROR("DT %s: not setup or attached\n", dt);
 394                 GOTO(out_md_fid, err = -ENODEV);
 395         }
 396
 397         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 398                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 399                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 400                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 401                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 402                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 403                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 404                                   OBD_CONNECT_MAXBYTES |
 405                                   OBD_CONNECT_EINPROGRESS |
 406                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 407                                   OBD_CONNECT_LAYOUTLOCK |
 408                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK;
 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         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 455                            LUSTRE_SEQ_METADATA);
 456         if (err) {
 457                 CERROR("%s: Can't init data layer FID infrastructure, "
 458                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 459                 GOTO(out_dt, err);
 460         }
 461
 462         mutex_lock(&sbi->ll_lco.lco_lock);
 463         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 464         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 465         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 466         mutex_unlock(&sbi->ll_lco.lco_lock);
 467
 468         fid_zero(&sbi->ll_root_fid);
 469         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid);
 470         if (err) {
 471                 CERROR("cannot mds_connect: rc = %d\n", err);
 472                 GOTO(out_lock_cn_cb, err);
 473         }
 474         if (!fid_is_sane(&sbi->ll_root_fid)) {
 475                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 476                        sbi->ll_md_exp->exp_obd->obd_name,
 477                        PFID(&sbi->ll_root_fid));
 478                 GOTO(out_lock_cn_cb, err = -EINVAL);
 479         }
 480         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 481
 482         sb->s_op = &lustre_super_operations;
 483 #if THREAD_SIZE >= 8192 /*b=17630*/
 484         sb->s_export_op = &lustre_export_operations;
 485 #endif
 486
 487         /* make root inode
 488          * XXX: move this to after cbd setup? */
 489         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 490         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 491                 valid |= OBD_MD_FLRMTPERM;
 492         else if (sbi->ll_flags & LL_SBI_ACL)
 493                 valid |= OBD_MD_FLACL;
 494
 495         OBD_ALLOC_PTR(op_data);
 496         if (op_data == NULL)
 497                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 498
 499         op_data->op_fid1 = sbi->ll_root_fid;
 500         op_data->op_mode = 0;
 501         op_data->op_valid = valid;
 502
 503         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 504
 505         OBD_FREE_PTR(op_data);
 506         if (err) {
 507                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 508                        sbi->ll_md_exp->exp_obd->obd_name, err);
 509                 GOTO(out_lock_cn_cb, err);
 510         }
 511
 512         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 513                                sbi->ll_md_exp, &lmd);
 514         if (err) {
 515                 CERROR("failed to understand root inode md: rc = %d\n", err);
 516                 ptlrpc_req_finished(request);
 517                 GOTO(out_lock_cn_cb, err);
 518         }
 519
 520         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 521         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 522                                             sbi->ll_flags & LL_SBI_32BIT_API),
 523                        &lmd);
 524         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 525         ptlrpc_req_finished(request);
 526
 527         if (IS_ERR(root)) {
 528 #ifdef CONFIG_FS_POSIX_ACL
 529                 if (lmd.posix_acl) {
 530                         posix_acl_release(lmd.posix_acl);
 531                         lmd.posix_acl = NULL;
 532                 }
 533 #endif
 534                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 535                 root = NULL;
 536                 CERROR("lustre_lite: bad iget4 for root\n");
 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 #ifdef HAVE_DCACHE_LOCK
 564         sb->s_root->d_op = &ll_d_ops;
 565 #endif
 566
 567         sbi->ll_sdev_orig = sb->s_dev;
 568
 569         /* We set sb->s_dev equal on all lustre clients in order to support
 570          * NFS export clustering.  NFSD requires that the FSID be the same
 571          * on all clients. */
 572         /* s_dev is also used in lt_compare() to compare two fs, but that is
 573          * only a node-local comparison. */
 574         uuid = obd_get_uuid(sbi->ll_md_exp);
 575         if (uuid != NULL)
 576                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 577
 578         if (data != NULL)
 579                 OBD_FREE_PTR(data);
 580         if (osfs != NULL)
 581                 OBD_FREE_PTR(osfs);
 582         if (proc_lustre_fs_root != NULL) {
 583                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 584                                                   dt, md);
 585                 if (err < 0) {
 586                         CERROR("%s: could not register mount in lprocfs: "
 587                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 588                         err = 0;
 589                 }
 590         }
 591
 592         RETURN(err);
 593 out_root:
 594         if (root)
 595                 iput(root);
 596 out_lock_cn_cb:
 597         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 598 out_dt:
 599         obd_disconnect(sbi->ll_dt_exp);
 600         sbi->ll_dt_exp = NULL;
 601 out_md_fid:
 602         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 603 out_md:
 604         obd_disconnect(sbi->ll_md_exp);
 605         sbi->ll_md_exp = NULL;
 606 out:
 607         if (data != NULL)
 608                 OBD_FREE_PTR(data);
 609         if (osfs != NULL)
 610                 OBD_FREE_PTR(osfs);
 611         return err;
 612 }
 613
 614 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 615 {
 616         int size, rc;
 617
 618         size = sizeof(*lmmsize);
 619         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 620                           KEY_MAX_EASIZE, &size, lmmsize);
 621         if (rc != 0) {
 622                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 623                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 624                 RETURN(rc);
 625         }
 626
 627         size = sizeof(int);
 628         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 629                           KEY_MAX_EASIZE, &size, lmmsize);
 630         if (rc)
 631                 CERROR("Get max mdsize error rc %d\n", rc);
 632
 633         RETURN(rc);
 634 }
 635
 636 /**
 637  * Get the value of the default_easize parameter.
 638  *
 639  * \see client_obd::cl_default_mds_easize
 640  *
 641  * \param[in] sbi       superblock info for this filesystem
 642  * \param[out] lmmsize  pointer to storage location for value
 643  *
 644  * \retval 0            on success
 645  * \retval negative     negated errno on failure
 646  */
 647 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 648 {
 649         int size, rc;
 650
 651         size = sizeof(int);
 652         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 653                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 654         if (rc)
 655                 CERROR("Get default mdsize error rc %d\n", rc);
 656
 657         RETURN(rc);
 658 }
 659
 660 /**
 661  * Set the default_easize parameter to the given value.
 662  *
 663  * \see client_obd::cl_default_mds_easize
 664  *
 665  * \param[in] sbi       superblock info for this filesystem
 666  * \param[in] lmmsize   the size to set
 667  *
 668  * \retval 0            on success
 669  * \retval negative     negated errno on failure
 670  */
 671 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 672 {
 673         int rc;
 674
 675         if (lmmsize < sizeof(struct lov_mds_md) ||
 676             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 677                 return -EINVAL;
 678
 679         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 680                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 681                                 sizeof(int), &lmmsize, NULL);
 682
 683         RETURN(rc);
 684 }
 685
 686 static void ll_dump_inode(struct inode *inode)
 687 {
 688         struct ll_d_hlist_node *tmp;
 689         int dentry_count = 0;
 690
 691         LASSERT(inode != NULL);
 692
 693         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 694                 dentry_count++;
 695
 696         CERROR("%s: inode %p dump: dev=%s fid="DFID
 697                " mode=%o count=%u, %d dentries\n",
 698                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 699                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 700                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 701 }
 702
 703 void lustre_dump_dentry(struct dentry *dentry, int recur)
 704 {
 705         struct list_head *tmp;
 706         int subdirs = 0;
 707
 708         LASSERT(dentry != NULL);
 709
 710         list_for_each(tmp, &dentry->d_subdirs)
 711                 subdirs++;
 712
 713         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 714                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 715                dentry->d_name.len, dentry->d_name.name,
 716                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 717                dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
 718                dentry->d_flags, dentry->d_fsdata, subdirs);
 719         if (dentry->d_inode != NULL)
 720                 ll_dump_inode(dentry->d_inode);
 721
 722         if (recur == 0)
 723                 return;
 724
 725         list_for_each(tmp, &dentry->d_subdirs) {
 726                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
 727                 lustre_dump_dentry(d, recur - 1);
 728         }
 729 }
 730
 731 static void client_common_put_super(struct super_block *sb)
 732 {
 733         struct ll_sb_info *sbi = ll_s2sbi(sb);
 734         ENTRY;
 735
 736 #ifdef CONFIG_FS_POSIX_ACL
 737         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 738                 et_fini(&sbi->ll_et);
 739                 rct_fini(&sbi->ll_rct);
 740         }
 741 #endif
 742
 743         cl_sb_fini(sb);
 744
 745         list_del(&sbi->ll_conn_chain);
 746
 747         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 748         obd_disconnect(sbi->ll_dt_exp);
 749         sbi->ll_dt_exp = NULL;
 750
 751         lprocfs_unregister_mountpoint(sbi);
 752
 753         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 754         obd_disconnect(sbi->ll_md_exp);
 755         sbi->ll_md_exp = NULL;
 756
 757         EXIT;
 758 }
 759
 760 void ll_kill_super(struct super_block *sb)
 761 {
 762         struct ll_sb_info *sbi;
 763         ENTRY;
 764
 765         /* not init sb ?*/
 766         if (!(sb->s_flags & MS_ACTIVE))
 767                 return;
 768
 769         sbi = ll_s2sbi(sb);
 770         /* we need restore s_dev from changed for clustred NFS before put_super
 771          * because new kernels have cached s_dev and change sb->s_dev in
 772          * put_super not affected real removing devices */
 773         if (sbi) {
 774                 sb->s_dev = sbi->ll_sdev_orig;
 775                 sbi->ll_umounting = 1;
 776
 777                 /* wait running statahead threads to quit */
 778                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 779                         set_current_state(TASK_UNINTERRUPTIBLE);
 780                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 781                 }
 782         }
 783
 784         EXIT;
 785 }
 786
 787 static inline int ll_set_opt(const char *opt, char *data, int fl)
 788 {
 789         if (strncmp(opt, data, strlen(opt)) != 0)
 790                 return(0);
 791         else
 792                 return(fl);
 793 }
 794
 795 /* non-client-specific mount options are parsed in lmd_parse */
 796 static int ll_options(char *options, int *flags)
 797 {
 798         int tmp;
 799         char *s1 = options, *s2;
 800         ENTRY;
 801
 802         if (!options)
 803                 RETURN(0);
 804
 805         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 806
 807         while (*s1) {
 808                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 809                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 810                 if (tmp) {
 811                         *flags |= tmp;
 812                         goto next;
 813                 }
 814                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 815                 if (tmp) {
 816                         *flags |= tmp;
 817                         goto next;
 818                 }
 819                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 820                 if (tmp) {
 821                         *flags |= tmp;
 822                         goto next;
 823                 }
 824                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 825                 if (tmp) {
 826                         *flags &= ~tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 830                 if (tmp) {
 831                         *flags |= tmp;
 832                         goto next;
 833                 }
 834                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 835                 if (tmp) {
 836                         *flags &= ~tmp;
 837                         goto next;
 838                 }
 839                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 840                 if (tmp) {
 841                         *flags |= tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 850                 if (tmp) {
 851                         *flags &= ~tmp;
 852                         goto next;
 853                 }
 854
 855                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 856                 if (tmp) {
 857                         *flags |= tmp;
 858                         goto next;
 859                 }
 860                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 861                 if (tmp) {
 862                         *flags &= ~tmp;
 863                         goto next;
 864                 }
 865                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 866                 if (tmp) {
 867                         *flags |= tmp;
 868                         goto next;
 869                 }
 870                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 871                 if (tmp) {
 872                         *flags &= ~tmp;
 873                         goto next;
 874                 }
 875                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 876                 if (tmp) {
 877                         *flags |= tmp;
 878                         goto next;
 879                 }
 880                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 881                 if (tmp) {
 882                         *flags &= ~tmp;
 883                         goto next;
 884                 }
 885                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 886                 if (tmp) {
 887                         *flags |= tmp;
 888                         goto next;
 889                 }
 890                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 891                 if (tmp) {
 892                         *flags |= tmp;
 893                         goto next;
 894                 }
 895                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 896                 if (tmp) {
 897                         *flags &= ~tmp;
 898                         goto next;
 899                 }
 900                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 901                                    s1);
 902                 RETURN(-EINVAL);
 903
 904 next:
 905                 /* Find next opt */
 906                 s2 = strchr(s1, ',');
 907                 if (s2 == NULL)
 908                         break;
 909                 s1 = s2 + 1;
 910         }
 911         RETURN(0);
 912 }
 913
 914 void ll_lli_init(struct ll_inode_info *lli)
 915 {
 916         lli->lli_inode_magic = LLI_INODE_MAGIC;
 917         lli->lli_flags = 0;
 918         spin_lock_init(&lli->lli_lock);
 919         lli->lli_posix_acl = NULL;
 920         lli->lli_remote_perms = NULL;
 921         mutex_init(&lli->lli_rmtperm_mutex);
 922         /* Do not set lli_fid, it has been initialized already. */
 923         fid_zero(&lli->lli_pfid);
 924         atomic_set(&lli->lli_open_count, 0);
 925         lli->lli_rmtperm_time = 0;
 926         lli->lli_mds_read_och = NULL;
 927         lli->lli_mds_write_och = NULL;
 928         lli->lli_mds_exec_och = NULL;
 929         lli->lli_open_fd_read_count = 0;
 930         lli->lli_open_fd_write_count = 0;
 931         lli->lli_open_fd_exec_count = 0;
 932         mutex_init(&lli->lli_och_mutex);
 933         spin_lock_init(&lli->lli_agl_lock);
 934         spin_lock_init(&lli->lli_layout_lock);
 935         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 936         lli->lli_clob = NULL;
 937
 938         init_rwsem(&lli->lli_xattrs_list_rwsem);
 939         mutex_init(&lli->lli_xattrs_enq_lock);
 940
 941         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 942         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 943                 mutex_init(&lli->lli_readdir_mutex);
 944                 lli->lli_opendir_key = NULL;
 945                 lli->lli_sai = NULL;
 946                 spin_lock_init(&lli->lli_sa_lock);
 947                 lli->lli_opendir_pid = 0;
 948                 lli->lli_sa_enabled = 0;
 949                 lli->lli_def_stripe_offset = -1;
 950         } else {
 951                 mutex_init(&lli->lli_size_mutex);
 952                 lli->lli_symlink_name = NULL;
 953                 init_rwsem(&lli->lli_trunc_sem);
 954                 range_lock_tree_init(&lli->lli_write_tree);
 955                 init_rwsem(&lli->lli_glimpse_sem);
 956                 lli->lli_glimpse_time = 0;
 957                 INIT_LIST_HEAD(&lli->lli_agl_list);
 958                 lli->lli_agl_index = 0;
 959                 lli->lli_async_rc = 0;
 960         }
 961         mutex_init(&lli->lli_layout_mutex);
 962 }
 963
 964 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 965 {
 966         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 967
 968         bdi->name = "lustre";
 969         return bdi_register(bdi, NULL, "lustre-%d",
 970                             atomic_inc_return(&ll_bdi_num));
 971 }
 972
 973 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 974 {
 975         struct lustre_profile *lprof = NULL;
 976         struct lustre_sb_info *lsi = s2lsi(sb);
 977         struct ll_sb_info *sbi;
 978         char  *dt = NULL, *md = NULL;
 979         char  *profilenm = get_profile_name(sb);
 980         struct config_llog_instance *cfg;
 981         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 982         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 983         int    err;
 984         ENTRY;
 985
 986         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 987
 988         OBD_ALLOC_PTR(cfg);
 989         if (cfg == NULL)
 990                 RETURN(-ENOMEM);
 991
 992         try_module_get(THIS_MODULE);
 993
 994         /* client additional sb info */
 995         lsi->lsi_llsbi = sbi = ll_init_sbi();
 996         if (!sbi) {
 997                 module_put(THIS_MODULE);
 998                 OBD_FREE_PTR(cfg);
 999                 RETURN(-ENOMEM);
1000         }
1001
1002         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1003         if (err)
1004                 GOTO(out_free, err);
1005
1006         err = bdi_init(&lsi->lsi_bdi);
1007         if (err)
1008                 GOTO(out_free, err);
1009         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1010         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1011         err = ll_bdi_register(&lsi->lsi_bdi);
1012         if (err)
1013                 GOTO(out_free, err);
1014
1015         sb->s_bdi = &lsi->lsi_bdi;
1016 #ifndef HAVE_DCACHE_LOCK
1017         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1018         sb->s_d_op = &ll_d_ops;
1019 #endif
1020
1021         /* Generate a string unique to this super, in case some joker tries
1022            to mount the same fs at two mount points.
1023            Use the address of the super itself.*/
1024         cfg->cfg_instance = sb;
1025         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1026         cfg->cfg_callback = class_config_llog_handler;
1027         /* set up client obds */
1028         err = lustre_process_log(sb, profilenm, cfg);
1029         if (err < 0)
1030                 GOTO(out_free, err);
1031
1032         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1033         lprof = class_get_profile(profilenm);
1034         if (lprof == NULL) {
1035                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1036                                    " read from the MGS.  Does that filesystem "
1037                                    "exist?\n", profilenm);
1038                 GOTO(out_free, err = -EINVAL);
1039         }
1040         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1041                lprof->lp_md, lprof->lp_dt);
1042
1043         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1044         if (!dt)
1045                 GOTO(out_free, err = -ENOMEM);
1046         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1047
1048         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1049         if (!md)
1050                 GOTO(out_free, err = -ENOMEM);
1051         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1052
1053         /* connections, registrations, sb setup */
1054         err = client_common_fill_super(sb, md, dt, mnt);
1055         if (err < 0)
1056                 GOTO(out_free, err);
1057
1058         sbi->ll_client_common_fill_super_succeeded = 1;
1059
1060 out_free:
1061         if (md)
1062                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1063         if (dt)
1064                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1065         if (err)
1066                 ll_put_super(sb);
1067         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1068                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1069
1070         OBD_FREE_PTR(cfg);
1071         RETURN(err);
1072 } /* ll_fill_super */
1073
1074 void ll_put_super(struct super_block *sb)
1075 {
1076         struct config_llog_instance cfg, params_cfg;
1077         struct obd_device *obd;
1078         struct lustre_sb_info *lsi = s2lsi(sb);
1079         struct ll_sb_info *sbi = ll_s2sbi(sb);
1080         char *profilenm = get_profile_name(sb);
1081         long ccc_count;
1082         int next, force = 1, rc = 0;
1083         ENTRY;
1084
1085         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1086
1087         cfg.cfg_instance = sb;
1088         lustre_end_log(sb, profilenm, &cfg);
1089
1090         params_cfg.cfg_instance = sb;
1091         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1092
1093         if (sbi->ll_md_exp) {
1094                 obd = class_exp2obd(sbi->ll_md_exp);
1095                 if (obd)
1096                         force = obd->obd_force;
1097         }
1098
1099         /* Wait for unstable pages to be committed to stable storage */
1100         if (force == 0) {
1101                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1102                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1103                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1104                         &lwi);
1105         }
1106
1107         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1108         if (force == 0 && rc != -EINTR)
1109                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1110
1111
1112         /* We need to set force before the lov_disconnect in
1113            lustre_common_put_super, since l_d cleans up osc's as well. */
1114         if (force) {
1115                 next = 0;
1116                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1117                                                      &next)) != NULL) {
1118                         obd->obd_force = force;
1119                 }
1120         }
1121
1122         if (sbi->ll_client_common_fill_super_succeeded) {
1123                 /* Only if client_common_fill_super succeeded */
1124                 client_common_put_super(sb);
1125         }
1126
1127         next = 0;
1128         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1129                 class_manual_cleanup(obd);
1130         }
1131
1132         if (sbi->ll_flags & LL_SBI_VERBOSE)
1133                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1134
1135         if (profilenm)
1136                 class_del_profile(profilenm);
1137
1138         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1139                 bdi_destroy(&lsi->lsi_bdi);
1140                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1141         }
1142
1143         ll_free_sbi(sb);
1144         lsi->lsi_llsbi = NULL;
1145
1146         lustre_common_put_super(sb);
1147
1148         cl_env_cache_purge(~0);
1149
1150         module_put(THIS_MODULE);
1151
1152         EXIT;
1153 } /* client_put_super */
1154
1155 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1156 {
1157         struct inode *inode = NULL;
1158
1159         /* NOTE: we depend on atomic igrab() -bzzz */
1160         lock_res_and_lock(lock);
1161         if (lock->l_resource->lr_lvb_inode) {
1162                 struct ll_inode_info * lli;
1163                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1164                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1165                         inode = igrab(lock->l_resource->lr_lvb_inode);
1166                 } else {
1167                         inode = lock->l_resource->lr_lvb_inode;
1168                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1169                                          D_WARNING, lock, "lr_lvb_inode %p is "
1170                                          "bogus: magic %08x",
1171                                          lock->l_resource->lr_lvb_inode,
1172                                          lli->lli_inode_magic);
1173                         inode = NULL;
1174                 }
1175         }
1176         unlock_res_and_lock(lock);
1177         return inode;
1178 }
1179
1180 static void ll_dir_clear_lsm_md(struct inode *inode)
1181 {
1182         struct ll_inode_info *lli = ll_i2info(inode);
1183
1184         LASSERT(S_ISDIR(inode->i_mode));
1185
1186         if (lli->lli_lsm_md != NULL) {
1187                 lmv_free_memmd(lli->lli_lsm_md);
1188                 lli->lli_lsm_md = NULL;
1189         }
1190 }
1191
1192 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1193                                       const struct lu_fid *fid,
1194                                       struct lustre_md *md)
1195 {
1196         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1197         struct mdt_body         *body = md->body;
1198         struct inode            *inode;
1199         ino_t                   ino;
1200         ENTRY;
1201
1202         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1203         inode = iget_locked(sb, ino);
1204         if (inode == NULL) {
1205                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1206                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1207                 RETURN(ERR_PTR(-ENOENT));
1208         }
1209
1210         if (inode->i_state & I_NEW) {
1211                 struct ll_inode_info *lli = ll_i2info(inode);
1212                 struct lmv_stripe_md *lsm = md->lmv;
1213
1214                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1215                                 (body->mbo_mode & S_IFMT);
1216                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1217                          PFID(fid));
1218
1219                 LTIME_S(inode->i_mtime) = 0;
1220                 LTIME_S(inode->i_atime) = 0;
1221                 LTIME_S(inode->i_ctime) = 0;
1222                 inode->i_rdev = 0;
1223
1224                 /* initializing backing dev info. */
1225                 inode->i_mapping->backing_dev_info =
1226                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1227                 inode->i_op = &ll_dir_inode_operations;
1228                 inode->i_fop = &ll_dir_operations;
1229                 lli->lli_fid = *fid;
1230                 ll_lli_init(lli);
1231
1232                 LASSERT(lsm != NULL);
1233                 /* master object FID */
1234                 lli->lli_pfid = body->mbo_fid1;
1235                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1236                        lli, PFID(fid), PFID(&lli->lli_pfid));
1237                 unlock_new_inode(inode);
1238         }
1239
1240         RETURN(inode);
1241 }
1242
1243 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1244 {
1245         struct lu_fid *fid;
1246         struct lmv_stripe_md *lsm = md->lmv;
1247         int i;
1248
1249         LASSERT(lsm != NULL);
1250         /* XXX sigh, this lsm_root initialization should be in
1251          * LMV layer, but it needs ll_iget right now, so we
1252          * put this here right now. */
1253         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1254                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1255                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1256                 /* Unfortunately ll_iget will call ll_update_inode,
1257                  * where the initialization of slave inode is slightly
1258                  * different, so it reset lsm_md to NULL to avoid
1259                  * initializing lsm for slave inode. */
1260                 /* For migrating inode, master stripe and master object will
1261                  * be same, so we only need assign this inode */
1262                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1263                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1264                 else
1265                         lsm->lsm_md_oinfo[i].lmo_root =
1266                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1267
1268                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1269                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1270
1271                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1272                         return rc;
1273                 }
1274         }
1275
1276         return 0;
1277 }
1278
1279 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1280                                 const struct lmv_stripe_md *lsm_md2)
1281 {
1282         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1283                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1284                lsm_md1->lsm_md_master_mdt_index ==
1285                                         lsm_md2->lsm_md_master_mdt_index &&
1286                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1287                lsm_md1->lsm_md_layout_version ==
1288                                         lsm_md2->lsm_md_layout_version &&
1289                strcmp(lsm_md1->lsm_md_pool_name,
1290                       lsm_md2->lsm_md_pool_name) == 0;
1291 }
1292
1293 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1294 {
1295         struct ll_inode_info *lli = ll_i2info(inode);
1296         struct lmv_stripe_md *lsm = md->lmv;
1297         int     rc;
1298         ENTRY;
1299
1300         LASSERT(S_ISDIR(inode->i_mode));
1301         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1302                PFID(ll_inode2fid(inode)));
1303
1304         /* no striped information from request. */
1305         if (lsm == NULL) {
1306                 if (lli->lli_lsm_md == NULL) {
1307                         RETURN(0);
1308                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1309                                                 LMV_HASH_FLAG_MIGRATION) {
1310                         /* migration is done, the temporay MIGRATE layout has
1311                          * been removed */
1312                         CDEBUG(D_INODE, DFID" finish migration.\n",
1313                                PFID(ll_inode2fid(inode)));
1314                         lmv_free_memmd(lli->lli_lsm_md);
1315                         lli->lli_lsm_md = NULL;
1316                         RETURN(0);
1317                 } else {
1318                         /* The lustre_md from req does not include stripeEA,
1319                          * see ll_md_setattr */
1320                         RETURN(0);
1321                 }
1322         }
1323
1324         /* set the directory layout */
1325         if (lli->lli_lsm_md == NULL) {
1326
1327                 rc = ll_init_lsm_md(inode, md);
1328                 if (rc != 0)
1329                         RETURN(rc);
1330
1331                 lli->lli_lsm_md = lsm;
1332                 /* set lsm_md to NULL, so the following free lustre_md
1333                  * will not free this lsm */
1334                 md->lmv = NULL;
1335                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1336                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1337                 RETURN(0);
1338         }
1339
1340         /* Compare the old and new stripe information */
1341         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1342                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1343                 int                     idx;
1344
1345                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1346                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1347                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1348                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1349                        inode, lsm, old_lsm,
1350                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1351                        lsm->lsm_md_stripe_count,
1352                        old_lsm->lsm_md_stripe_count,
1353                        lsm->lsm_md_master_mdt_index,
1354                        old_lsm->lsm_md_master_mdt_index,
1355                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1356                        lsm->lsm_md_layout_version,
1357                        old_lsm->lsm_md_layout_version,
1358                        lsm->lsm_md_pool_name,
1359                        old_lsm->lsm_md_pool_name);
1360
1361                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1362                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1363                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1364                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1365                 }
1366
1367                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1368                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1369                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1370                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1371                 }
1372
1373                 RETURN(-EIO);
1374         }
1375
1376         RETURN(0);
1377 }
1378
1379 void ll_clear_inode(struct inode *inode)
1380 {
1381         struct ll_inode_info *lli = ll_i2info(inode);
1382         struct ll_sb_info *sbi = ll_i2sbi(inode);
1383         ENTRY;
1384
1385         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1386                PFID(ll_inode2fid(inode)), inode);
1387
1388         if (S_ISDIR(inode->i_mode)) {
1389                 /* these should have been cleared in ll_file_release */
1390                 LASSERT(lli->lli_opendir_key == NULL);
1391                 LASSERT(lli->lli_sai == NULL);
1392                 LASSERT(lli->lli_opendir_pid == 0);
1393         }
1394
1395         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1396
1397         LASSERT(!lli->lli_open_fd_write_count);
1398         LASSERT(!lli->lli_open_fd_read_count);
1399         LASSERT(!lli->lli_open_fd_exec_count);
1400
1401         if (lli->lli_mds_write_och)
1402                 ll_md_real_close(inode, FMODE_WRITE);
1403         if (lli->lli_mds_exec_och)
1404                 ll_md_real_close(inode, FMODE_EXEC);
1405         if (lli->lli_mds_read_och)
1406                 ll_md_real_close(inode, FMODE_READ);
1407
1408         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1409                 OBD_FREE(lli->lli_symlink_name,
1410                          strlen(lli->lli_symlink_name) + 1);
1411                 lli->lli_symlink_name = NULL;
1412         }
1413
1414         ll_xattr_cache_destroy(inode);
1415
1416         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1417                 LASSERT(lli->lli_posix_acl == NULL);
1418                 if (lli->lli_remote_perms) {
1419                         free_rmtperm_hash(lli->lli_remote_perms);
1420                         lli->lli_remote_perms = NULL;
1421                 }
1422         }
1423 #ifdef CONFIG_FS_POSIX_ACL
1424         else if (lli->lli_posix_acl) {
1425                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1426                 LASSERT(lli->lli_remote_perms == NULL);
1427                 posix_acl_release(lli->lli_posix_acl);
1428                 lli->lli_posix_acl = NULL;
1429         }
1430 #endif
1431         lli->lli_inode_magic = LLI_INODE_DEAD;
1432
1433         if (S_ISDIR(inode->i_mode))
1434                 ll_dir_clear_lsm_md(inode);
1435         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1436                 LASSERT(list_empty(&lli->lli_agl_list));
1437
1438         /*
1439          * XXX This has to be done before lsm is freed below, because
1440          * cl_object still uses inode lsm.
1441          */
1442         cl_inode_fini(inode);
1443
1444         EXIT;
1445 }
1446
1447 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1448 {
1449         struct lustre_md md;
1450         struct inode *inode = dentry->d_inode;
1451         struct ll_sb_info *sbi = ll_i2sbi(inode);
1452         struct ptlrpc_request *request = NULL;
1453         int rc, ia_valid;
1454         ENTRY;
1455
1456         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1457                                      LUSTRE_OPC_ANY, NULL);
1458         if (IS_ERR(op_data))
1459                 RETURN(PTR_ERR(op_data));
1460
1461         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1462         if (rc) {
1463                 ptlrpc_req_finished(request);
1464                 if (rc == -ENOENT) {
1465                         clear_nlink(inode);
1466                         /* Unlinked special device node? Or just a race?
1467                          * Pretend we done everything. */
1468                         if (!S_ISREG(inode->i_mode) &&
1469                             !S_ISDIR(inode->i_mode)) {
1470                                 ia_valid = op_data->op_attr.ia_valid;
1471                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1472                                 rc = simple_setattr(dentry, &op_data->op_attr);
1473                                 op_data->op_attr.ia_valid = ia_valid;
1474                         }
1475                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1476                         CERROR("md_setattr fails: rc = %d\n", rc);
1477                 }
1478                 RETURN(rc);
1479         }
1480
1481         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1482                               sbi->ll_md_exp, &md);
1483         if (rc) {
1484                 ptlrpc_req_finished(request);
1485                 RETURN(rc);
1486         }
1487
1488         ia_valid = op_data->op_attr.ia_valid;
1489         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1490          * cache is not cleared yet. */
1491         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1492         rc = simple_setattr(dentry, &op_data->op_attr);
1493         op_data->op_attr.ia_valid = ia_valid;
1494
1495         rc = ll_update_inode(inode, &md);
1496         ptlrpc_req_finished(request);
1497
1498         RETURN(rc);
1499 }
1500
1501 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1502  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1503  * keep these values until such a time that objects are allocated for it.
1504  * We do the MDS operations first, as it is checking permissions for us.
1505  * We don't to the MDS RPC if there is nothing that we want to store there,
1506  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1507  * going to do an RPC anyways.
1508  *
1509  * If we are doing a truncate, we will send the mtime and ctime updates
1510  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1511  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1512  * at the same time.
1513  *
1514  * In case of HSMimport, we only set attr on MDS.
1515  */
1516 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1517 {
1518         struct inode *inode = dentry->d_inode;
1519         struct ll_inode_info *lli = ll_i2info(inode);
1520         struct md_op_data *op_data = NULL;
1521         bool file_is_released = false;
1522         int rc = 0;
1523         ENTRY;
1524
1525         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1526                "valid %x, hsm_import %d\n",
1527                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1528                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1529                hsm_import);
1530
1531         if (attr->ia_valid & ATTR_SIZE) {
1532                 /* Check new size against VFS/VM file size limit and rlimit */
1533                 rc = inode_newsize_ok(inode, attr->ia_size);
1534                 if (rc)
1535                         RETURN(rc);
1536
1537                 /* The maximum Lustre file size is variable, based on the
1538                  * OST maximum object size and number of stripes.  This
1539                  * needs another check in addition to the VFS check above. */
1540                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1541                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1542                                PFID(&lli->lli_fid), attr->ia_size,
1543                                ll_file_maxbytes(inode));
1544                         RETURN(-EFBIG);
1545                 }
1546
1547                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1548         }
1549
1550         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1551         if (attr->ia_valid & TIMES_SET_FLAGS) {
1552                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1553                     !cfs_capable(CFS_CAP_FOWNER))
1554                         RETURN(-EPERM);
1555         }
1556
1557         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1558         if (attr->ia_valid & ATTR_CTIME) {
1559                 attr->ia_ctime = CFS_CURRENT_TIME;
1560                 attr->ia_valid |= ATTR_CTIME_SET;
1561         }
1562         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1563             (attr->ia_valid & ATTR_ATIME)) {
1564                 attr->ia_atime = CFS_CURRENT_TIME;
1565                 attr->ia_valid |= ATTR_ATIME_SET;
1566         }
1567         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1568             (attr->ia_valid & ATTR_MTIME)) {
1569                 attr->ia_mtime = CFS_CURRENT_TIME;
1570                 attr->ia_valid |= ATTR_MTIME_SET;
1571         }
1572
1573         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1574                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1575                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1576                        cfs_time_current_sec());
1577
1578         /* We always do an MDS RPC, even if we're only changing the size;
1579          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1580
1581         OBD_ALLOC_PTR(op_data);
1582         if (op_data == NULL)
1583                 RETURN(-ENOMEM);
1584
1585         if (!S_ISDIR(inode->i_mode)) {
1586                 if (attr->ia_valid & ATTR_SIZE)
1587                         inode_dio_write_done(inode);
1588                 mutex_unlock(&inode->i_mutex);
1589         }
1590
1591         /* truncate on a released file must failed with -ENODATA,
1592          * so size must not be set on MDS for released file
1593          * but other attributes must be set
1594          */
1595         if (S_ISREG(inode->i_mode)) {
1596                 struct cl_layout cl = {
1597                         .cl_is_released = false,
1598                 };
1599                 struct lu_env *env;
1600                 int refcheck;
1601                 __u32 gen;
1602
1603                 rc = ll_layout_refresh(inode, &gen);
1604                 if (rc < 0)
1605                         GOTO(out, rc);
1606
1607                 /* XXX: the only place we need to know the layout type,
1608                  * this will be removed by a later patch. -Jinshan */
1609                 env = cl_env_get(&refcheck);
1610                 if (IS_ERR(env))
1611                         GOTO(out, rc = PTR_ERR(env));
1612
1613                 rc = cl_object_layout_get(env, lli->lli_clob, &cl);
1614                 cl_env_put(env, &refcheck);
1615                 if (rc < 0)
1616                         GOTO(out, rc);
1617
1618                 file_is_released = cl.cl_is_released;
1619
1620                 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1621                         if (file_is_released) {
1622                                 rc = ll_layout_restore(inode, 0, attr->ia_size);
1623                                 if (rc < 0)
1624                                         GOTO(out, rc);
1625
1626                                 file_is_released = false;
1627                                 ll_layout_refresh(inode, &gen);
1628                         }
1629
1630                         /* If we are changing file size, file content is
1631                          * modified, flag it. */
1632                         attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1633                         spin_lock(&lli->lli_lock);
1634                         lli->lli_flags |= LLIF_DATA_MODIFIED;
1635                         spin_unlock(&lli->lli_lock);
1636                         op_data->op_bias |= MDS_DATA_MODIFIED;
1637                 }
1638         }
1639
1640         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1641
1642         rc = ll_md_setattr(dentry, op_data);
1643         if (rc)
1644                 GOTO(out, rc);
1645
1646         /* RPC to MDT is sent, cancel data modification flag */
1647         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1648                 spin_lock(&lli->lli_lock);
1649                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1650                 spin_unlock(&lli->lli_lock);
1651         }
1652
1653         if (!S_ISREG(inode->i_mode) || file_is_released)
1654                 GOTO(out, rc = 0);
1655
1656         if (attr->ia_valid & (ATTR_SIZE |
1657                               ATTR_ATIME | ATTR_ATIME_SET |
1658                               ATTR_MTIME | ATTR_MTIME_SET)) {
1659                 /* For truncate and utimes sending attributes to OSTs, setting
1660                  * mtime/atime to the past will be performed under PW [0:EOF]
1661                  * extent lock (new_size:EOF for truncate).  It may seem
1662                  * excessive to send mtime/atime updates to OSTs when not
1663                  * setting times to past, but it is necessary due to possible
1664                  * time de-synchronization between MDT inode and OST objects */
1665                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1666         }
1667         EXIT;
1668 out:
1669         if (op_data != NULL)
1670                 ll_finish_md_op_data(op_data);
1671
1672         if (!S_ISDIR(inode->i_mode)) {
1673                 mutex_lock(&inode->i_mutex);
1674                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1675                         inode_dio_wait(inode);
1676         }
1677
1678         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1679                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1680
1681         return rc;
1682 }
1683
1684 int ll_setattr(struct dentry *de, struct iattr *attr)
1685 {
1686         int mode = de->d_inode->i_mode;
1687
1688         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1689                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1690                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1691
1692         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1693                                (ATTR_SIZE|ATTR_MODE)) &&
1694             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1695              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1696               !(attr->ia_mode & S_ISGID))))
1697                 attr->ia_valid |= ATTR_FORCE;
1698
1699         if ((attr->ia_valid & ATTR_MODE) &&
1700             (mode & S_ISUID) &&
1701             !(attr->ia_mode & S_ISUID) &&
1702             !(attr->ia_valid & ATTR_KILL_SUID))
1703                 attr->ia_valid |= ATTR_KILL_SUID;
1704
1705         if ((attr->ia_valid & ATTR_MODE) &&
1706             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1707             !(attr->ia_mode & S_ISGID) &&
1708             !(attr->ia_valid & ATTR_KILL_SGID))
1709                 attr->ia_valid |= ATTR_KILL_SGID;
1710
1711         return ll_setattr_raw(de, attr, false);
1712 }
1713
1714 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1715                        __u64 max_age, __u32 flags)
1716 {
1717         struct ll_sb_info *sbi = ll_s2sbi(sb);
1718         struct obd_statfs obd_osfs;
1719         int rc;
1720         ENTRY;
1721
1722         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1723         if (rc) {
1724                 CERROR("md_statfs fails: rc = %d\n", rc);
1725                 RETURN(rc);
1726         }
1727
1728         osfs->os_type = sb->s_magic;
1729
1730         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1731                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1732
1733         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1734                 flags |= OBD_STATFS_NODELAY;
1735
1736         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1737         if (rc) {
1738                 CERROR("obd_statfs fails: rc = %d\n", rc);
1739                 RETURN(rc);
1740         }
1741
1742         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1743                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1744                obd_osfs.os_files);
1745
1746         osfs->os_bsize = obd_osfs.os_bsize;
1747         osfs->os_blocks = obd_osfs.os_blocks;
1748         osfs->os_bfree = obd_osfs.os_bfree;
1749         osfs->os_bavail = obd_osfs.os_bavail;
1750
1751         /* If we don't have as many objects free on the OST as inodes
1752          * on the MDS, we reduce the total number of inodes to
1753          * compensate, so that the "inodes in use" number is correct.
1754          */
1755         if (obd_osfs.os_ffree < osfs->os_ffree) {
1756                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1757                         obd_osfs.os_ffree;
1758                 osfs->os_ffree = obd_osfs.os_ffree;
1759         }
1760
1761         RETURN(rc);
1762 }
1763 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1764 {
1765         struct super_block *sb = de->d_sb;
1766         struct obd_statfs osfs;
1767         __u64 fsid = huge_encode_dev(sb->s_dev);
1768         int rc;
1769
1770         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1771         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1772
1773         /* Some amount of caching on the client is allowed */
1774         rc = ll_statfs_internal(sb, &osfs,
1775                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1776                                 0);
1777         if (rc)
1778                 return rc;
1779
1780         statfs_unpack(sfs, &osfs);
1781
1782         /* We need to downshift for all 32-bit kernels, because we can't
1783          * tell if the kernel is being called via sys_statfs64() or not.
1784          * Stop before overflowing f_bsize - in which case it is better
1785          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1786         if (sizeof(long) < 8) {
1787                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1788                         sfs->f_bsize <<= 1;
1789
1790                         osfs.os_blocks >>= 1;
1791                         osfs.os_bfree >>= 1;
1792                         osfs.os_bavail >>= 1;
1793                 }
1794         }
1795
1796         sfs->f_blocks = osfs.os_blocks;
1797         sfs->f_bfree = osfs.os_bfree;
1798         sfs->f_bavail = osfs.os_bavail;
1799         sfs->f_fsid.val[0] = (__u32)fsid;
1800         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1801         return 0;
1802 }
1803
1804 void ll_inode_size_lock(struct inode *inode)
1805 {
1806         struct ll_inode_info *lli;
1807
1808         LASSERT(!S_ISDIR(inode->i_mode));
1809
1810         lli = ll_i2info(inode);
1811         mutex_lock(&lli->lli_size_mutex);
1812 }
1813
1814 void ll_inode_size_unlock(struct inode *inode)
1815 {
1816         struct ll_inode_info *lli;
1817
1818         lli = ll_i2info(inode);
1819         mutex_unlock(&lli->lli_size_mutex);
1820 }
1821
1822 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1823 {
1824         struct ll_inode_info *lli = ll_i2info(inode);
1825         struct mdt_body *body = md->body;
1826         struct ll_sb_info *sbi = ll_i2sbi(inode);
1827
1828         if (body->mbo_valid & OBD_MD_FLEASIZE)
1829                 cl_file_inode_init(inode, md);
1830
1831         if (S_ISDIR(inode->i_mode)) {
1832                 int     rc;
1833
1834                 rc = ll_update_lsm_md(inode, md);
1835                 if (rc != 0)
1836                         return rc;
1837         }
1838
1839         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1840                 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1841                         ll_update_remote_perm(inode, md->remote_perm);
1842         }
1843 #ifdef CONFIG_FS_POSIX_ACL
1844         else if (body->mbo_valid & OBD_MD_FLACL) {
1845                 spin_lock(&lli->lli_lock);
1846                 if (lli->lli_posix_acl)
1847                         posix_acl_release(lli->lli_posix_acl);
1848                 lli->lli_posix_acl = md->posix_acl;
1849                 spin_unlock(&lli->lli_lock);
1850         }
1851 #endif
1852         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1853                                         sbi->ll_flags & LL_SBI_32BIT_API);
1854         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1855
1856         if (body->mbo_valid & OBD_MD_FLATIME) {
1857                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1858                         LTIME_S(inode->i_atime) = body->mbo_atime;
1859                 lli->lli_atime = body->mbo_atime;
1860         }
1861
1862         if (body->mbo_valid & OBD_MD_FLMTIME) {
1863                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1864                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1865                                "to "LPU64"\n", inode->i_ino,
1866                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1867                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1868                 }
1869                 lli->lli_mtime = body->mbo_mtime;
1870         }
1871
1872         if (body->mbo_valid & OBD_MD_FLCTIME) {
1873                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1874                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1875                 lli->lli_ctime = body->mbo_ctime;
1876         }
1877
1878         if (body->mbo_valid & OBD_MD_FLMODE)
1879                 inode->i_mode = (inode->i_mode & S_IFMT) |
1880                                 (body->mbo_mode & ~S_IFMT);
1881
1882         if (body->mbo_valid & OBD_MD_FLTYPE)
1883                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1884                                 (body->mbo_mode & S_IFMT);
1885
1886         LASSERT(inode->i_mode != 0);
1887         if (S_ISREG(inode->i_mode))
1888                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1889                                        LL_MAX_BLKSIZE_BITS);
1890         else
1891                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1892
1893         if (body->mbo_valid & OBD_MD_FLUID)
1894                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1895         if (body->mbo_valid & OBD_MD_FLGID)
1896                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1897         if (body->mbo_valid & OBD_MD_FLFLAGS)
1898                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1899         if (body->mbo_valid & OBD_MD_FLNLINK)
1900                 set_nlink(inode, body->mbo_nlink);
1901         if (body->mbo_valid & OBD_MD_FLRDEV)
1902                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1903
1904         if (body->mbo_valid & OBD_MD_FLID) {
1905                 /* FID shouldn't be changed! */
1906                 if (fid_is_sane(&lli->lli_fid)) {
1907                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1908                                  "Trying to change FID "DFID
1909                                  " to the "DFID", inode "DFID"(%p)\n",
1910                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1911                                  PFID(ll_inode2fid(inode)), inode);
1912                 } else {
1913                         lli->lli_fid = body->mbo_fid1;
1914                 }
1915         }
1916
1917         LASSERT(fid_seq(&lli->lli_fid) != 0);
1918
1919         if (body->mbo_valid & OBD_MD_FLSIZE) {
1920                 i_size_write(inode, body->mbo_size);
1921
1922                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1923                        PFID(ll_inode2fid(inode)),
1924                        (unsigned long long)body->mbo_size);
1925
1926                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1927                         inode->i_blocks = body->mbo_blocks;
1928         }
1929
1930         if (body->mbo_valid & OBD_MD_TSTATE) {
1931                 if (body->mbo_t_state & MS_RESTORE)
1932                         lli->lli_flags |= LLIF_FILE_RESTORING;
1933         }
1934
1935         return 0;
1936 }
1937
1938 int ll_read_inode2(struct inode *inode, void *opaque)
1939 {
1940         struct lustre_md *md = opaque;
1941         struct ll_inode_info *lli = ll_i2info(inode);
1942         int     rc;
1943         ENTRY;
1944
1945         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1946                PFID(&lli->lli_fid), inode);
1947
1948         /* Core attributes from the MDS first.  This is a new inode, and
1949          * the VFS doesn't zero times in the core inode so we have to do
1950          * it ourselves.  They will be overwritten by either MDS or OST
1951          * attributes - we just need to make sure they aren't newer. */
1952         LTIME_S(inode->i_mtime) = 0;
1953         LTIME_S(inode->i_atime) = 0;
1954         LTIME_S(inode->i_ctime) = 0;
1955         inode->i_rdev = 0;
1956         rc = ll_update_inode(inode, md);
1957         if (rc != 0)
1958                 RETURN(rc);
1959
1960         /* OIDEBUG(inode); */
1961
1962         /* initializing backing dev info. */
1963         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1964
1965
1966         if (S_ISREG(inode->i_mode)) {
1967                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1968                 inode->i_op = &ll_file_inode_operations;
1969                 inode->i_fop = sbi->ll_fop;
1970                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1971                 EXIT;
1972         } else if (S_ISDIR(inode->i_mode)) {
1973                 inode->i_op = &ll_dir_inode_operations;
1974                 inode->i_fop = &ll_dir_operations;
1975                 EXIT;
1976         } else if (S_ISLNK(inode->i_mode)) {
1977                 inode->i_op = &ll_fast_symlink_inode_operations;
1978                 EXIT;
1979         } else {
1980                 inode->i_op = &ll_special_inode_operations;
1981
1982                 init_special_inode(inode, inode->i_mode,
1983                                    inode->i_rdev);
1984
1985                 EXIT;
1986         }
1987
1988         return 0;
1989 }
1990
1991 void ll_delete_inode(struct inode *inode)
1992 {
1993         struct ll_inode_info *lli = ll_i2info(inode);
1994         ENTRY;
1995
1996         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1997                 /* It is last chance to write out dirty pages,
1998                  * otherwise we may lose data while umount */
1999                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2000
2001         truncate_inode_pages_final(&inode->i_data);
2002
2003         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2004                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2005                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2006
2007 #ifdef HAVE_SBOPS_EVICT_INODE
2008         ll_clear_inode(inode);
2009 #endif
2010         clear_inode(inode);
2011
2012         EXIT;
2013 }
2014
2015 int ll_iocontrol(struct inode *inode, struct file *file,
2016                  unsigned int cmd, unsigned long arg)
2017 {
2018         struct ll_sb_info *sbi = ll_i2sbi(inode);
2019         struct ptlrpc_request *req = NULL;
2020         int rc, flags = 0;
2021         ENTRY;
2022
2023         switch(cmd) {
2024         case FSFILT_IOC_GETFLAGS: {
2025                 struct mdt_body *body;
2026                 struct md_op_data *op_data;
2027
2028                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2029                                              0, 0, LUSTRE_OPC_ANY,
2030                                              NULL);
2031                 if (IS_ERR(op_data))
2032                         RETURN(PTR_ERR(op_data));
2033
2034                 op_data->op_valid = OBD_MD_FLFLAGS;
2035                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2036                 ll_finish_md_op_data(op_data);
2037                 if (rc) {
2038                         CERROR("%s: failure inode "DFID": rc = %d\n",
2039                                sbi->ll_md_exp->exp_obd->obd_name,
2040                                PFID(ll_inode2fid(inode)), rc);
2041                         RETURN(-abs(rc));
2042                 }
2043
2044                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2045
2046                 flags = body->mbo_flags;
2047
2048                 ptlrpc_req_finished(req);
2049
2050                 RETURN(put_user(flags, (int __user *)arg));
2051         }
2052         case FSFILT_IOC_SETFLAGS: {
2053                 struct iattr *attr;
2054                 struct md_op_data *op_data;
2055                 struct cl_object *obj;
2056
2057                 if (get_user(flags, (int __user *)arg))
2058                         RETURN(-EFAULT);
2059
2060                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2061                                              LUSTRE_OPC_ANY, NULL);
2062                 if (IS_ERR(op_data))
2063                         RETURN(PTR_ERR(op_data));
2064
2065                 op_data->op_attr_flags = flags;
2066                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2067                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2068                 ll_finish_md_op_data(op_data);
2069                 ptlrpc_req_finished(req);
2070                 if (rc)
2071                         RETURN(rc);
2072
2073                 inode->i_flags = ll_ext_to_inode_flags(flags);
2074
2075                 obj = ll_i2info(inode)->lli_clob;
2076                 if (obj == NULL)
2077                         RETURN(0);
2078
2079                 OBD_ALLOC_PTR(attr);
2080                 if (attr == NULL)
2081                         RETURN(-ENOMEM);
2082
2083                 attr->ia_valid = ATTR_ATTR_FLAG;
2084                 rc = cl_setattr_ost(obj, attr, flags);
2085
2086                 OBD_FREE_PTR(attr);
2087                 RETURN(rc);
2088         }
2089         default:
2090                 RETURN(-ENOSYS);
2091         }
2092
2093         RETURN(0);
2094 }
2095
2096 int ll_flush_ctx(struct inode *inode)
2097 {
2098         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2099
2100         CDEBUG(D_SEC, "flush context for user %d\n",
2101                from_kuid(&init_user_ns, current_uid()));
2102
2103         obd_set_info_async(NULL, sbi->ll_md_exp,
2104                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2105                            0, NULL, NULL);
2106         obd_set_info_async(NULL, sbi->ll_dt_exp,
2107                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2108                            0, NULL, NULL);
2109         return 0;
2110 }
2111
2112 /* umount -f client means force down, don't save state */
2113 void ll_umount_begin(struct super_block *sb)
2114 {
2115         struct ll_sb_info *sbi = ll_s2sbi(sb);
2116         struct obd_device *obd;
2117         struct obd_ioctl_data *ioc_data;
2118         ENTRY;
2119
2120         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2121                sb->s_count, atomic_read(&sb->s_active));
2122
2123         obd = class_exp2obd(sbi->ll_md_exp);
2124         if (obd == NULL) {
2125                 CERROR("Invalid MDC connection handle "LPX64"\n",
2126                        sbi->ll_md_exp->exp_handle.h_cookie);
2127                 EXIT;
2128                 return;
2129         }
2130         obd->obd_force = 1;
2131
2132         obd = class_exp2obd(sbi->ll_dt_exp);
2133         if (obd == NULL) {
2134                 CERROR("Invalid LOV connection handle "LPX64"\n",
2135                        sbi->ll_dt_exp->exp_handle.h_cookie);
2136                 EXIT;
2137                 return;
2138         }
2139         obd->obd_force = 1;
2140
2141         OBD_ALLOC_PTR(ioc_data);
2142         if (ioc_data) {
2143                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2144                               sizeof *ioc_data, ioc_data, NULL);
2145
2146                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2147                               sizeof *ioc_data, ioc_data, NULL);
2148
2149                 OBD_FREE_PTR(ioc_data);
2150         }
2151
2152         /* Really, we'd like to wait until there are no requests outstanding,
2153          * and then continue.  For now, we just invalidate the requests,
2154          * schedule() and sleep one second if needed, and hope.
2155          */
2156         schedule();
2157         EXIT;
2158 }
2159
2160 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2161 {
2162         struct ll_sb_info *sbi = ll_s2sbi(sb);
2163         char *profilenm = get_profile_name(sb);
2164         int err;
2165         __u32 read_only;
2166
2167         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2168                 read_only = *flags & MS_RDONLY;
2169                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2170                                          sizeof(KEY_READ_ONLY),
2171                                          KEY_READ_ONLY, sizeof(read_only),
2172                                          &read_only, NULL);
2173                 if (err) {
2174                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2175                                       profilenm, read_only ?
2176                                       "read-only" : "read-write", err);
2177                         return err;
2178                 }
2179
2180                 if (read_only)
2181                         sb->s_flags |= MS_RDONLY;
2182                 else
2183                         sb->s_flags &= ~MS_RDONLY;
2184
2185                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2186                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2187                                       read_only ?  "read-only" : "read-write");
2188         }
2189         return 0;
2190 }
2191
2192 /**
2193  * Cleanup the open handle that is cached on MDT-side.
2194  *
2195  * For open case, the client side open handling thread may hit error
2196  * after the MDT grant the open. Under such case, the client should
2197  * send close RPC to the MDT as cleanup; otherwise, the open handle
2198  * on the MDT will be leaked there until the client umount or evicted.
2199  *
2200  * In further, if someone unlinked the file, because the open handle
2201  * holds the reference on such file/object, then it will block the
2202  * subsequent threads that want to locate such object via FID.
2203  *
2204  * \param[in] sb        super block for this file-system
2205  * \param[in] open_req  pointer to the original open request
2206  */
2207 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2208 {
2209         struct mdt_body                 *body;
2210         struct md_op_data               *op_data;
2211         struct ptlrpc_request           *close_req = NULL;
2212         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2213         ENTRY;
2214
2215         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2216         OBD_ALLOC_PTR(op_data);
2217         if (op_data == NULL) {
2218                 CWARN("%s: cannot allocate op_data to release open handle for "
2219                       DFID"\n",
2220                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2221
2222                 RETURN_EXIT;
2223         }
2224
2225         op_data->op_fid1 = body->mbo_fid1;
2226         op_data->op_handle = body->mbo_handle;
2227         op_data->op_mod_time = cfs_time_current_sec();
2228         md_close(exp, op_data, NULL, &close_req);
2229         ptlrpc_req_finished(close_req);
2230         ll_finish_md_op_data(op_data);
2231
2232         EXIT;
2233 }
2234
2235 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2236                   struct super_block *sb, struct lookup_intent *it)
2237 {
2238         struct ll_sb_info *sbi = NULL;
2239         struct lustre_md md = { NULL };
2240         int rc;
2241         ENTRY;
2242
2243         LASSERT(*inode || sb);
2244         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2245         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2246                               sbi->ll_md_exp, &md);
2247         if (rc != 0)
2248                 GOTO(cleanup, rc);
2249
2250         if (*inode) {
2251                 rc = ll_update_inode(*inode, &md);
2252                 if (rc != 0)
2253                         GOTO(out, rc);
2254         } else {
2255                 LASSERT(sb != NULL);
2256
2257                 /*
2258                  * At this point server returns to client's same fid as client
2259                  * generated for creating. So using ->fid1 is okay here.
2260                  */
2261                 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2262
2263                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2264                                              sbi->ll_flags & LL_SBI_32BIT_API),
2265                                  &md);
2266                 if (IS_ERR(*inode)) {
2267 #ifdef CONFIG_FS_POSIX_ACL
2268                         if (md.posix_acl) {
2269                                 posix_acl_release(md.posix_acl);
2270                                 md.posix_acl = NULL;
2271                         }
2272 #endif
2273                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2274                         *inode = NULL;
2275                         CERROR("new_inode -fatal: rc %d\n", rc);
2276                         GOTO(out, rc);
2277                 }
2278         }
2279
2280         /* Handling piggyback layout lock.
2281          * Layout lock can be piggybacked by getattr and open request.
2282          * The lsm can be applied to inode only if it comes with a layout lock
2283          * otherwise correct layout may be overwritten, for example:
2284          * 1. proc1: mdt returns a lsm but not granting layout
2285          * 2. layout was changed by another client
2286          * 3. proc2: refresh layout and layout lock granted
2287          * 4. proc1: to apply a stale layout */
2288         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2289                 struct lustre_handle lockh;
2290                 struct ldlm_lock *lock;
2291
2292                 lockh.cookie = it->d.lustre.it_lock_handle;
2293                 lock = ldlm_handle2lock(&lockh);
2294                 LASSERT(lock != NULL);
2295                 if (ldlm_has_layout(lock)) {
2296                         struct cl_object_conf conf;
2297
2298                         memset(&conf, 0, sizeof(conf));
2299                         conf.coc_opc = OBJECT_CONF_SET;
2300                         conf.coc_inode = *inode;
2301                         conf.coc_lock = lock;
2302                         conf.u.coc_layout = md.layout;
2303                         (void)ll_layout_conf(*inode, &conf);
2304                 }
2305                 LDLM_LOCK_PUT(lock);
2306         }
2307
2308         GOTO(out, rc = 0);
2309
2310 out:
2311         md_free_lustre_md(sbi->ll_md_exp, &md);
2312
2313 cleanup:
2314         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2315                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2316
2317         return rc;
2318 }
2319
2320 int ll_obd_statfs(struct inode *inode, void __user *arg)
2321 {
2322         struct ll_sb_info *sbi = NULL;
2323         struct obd_export *exp;
2324         char *buf = NULL;
2325         struct obd_ioctl_data *data = NULL;
2326         __u32 type;
2327         __u32 __user flags;     /* not user, but obd_iocontrol is abused */
2328         int len = 0, rc;
2329
2330         if (!inode || !(sbi = ll_i2sbi(inode)))
2331                 GOTO(out_statfs, rc = -EINVAL);
2332
2333         rc = obd_ioctl_getdata(&buf, &len, arg);
2334         if (rc)
2335                 GOTO(out_statfs, rc);
2336
2337         data = (void*)buf;
2338         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2339             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2340                 GOTO(out_statfs, rc = -EINVAL);
2341
2342         if (data->ioc_inllen1 != sizeof(__u32) ||
2343             data->ioc_inllen2 != sizeof(__u32) ||
2344             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2345             data->ioc_plen2 != sizeof(struct obd_uuid))
2346                 GOTO(out_statfs, rc = -EINVAL);
2347
2348         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2349         if (type & LL_STATFS_LMV)
2350                 exp = sbi->ll_md_exp;
2351         else if (type & LL_STATFS_LOV)
2352                 exp = sbi->ll_dt_exp;
2353         else
2354                 GOTO(out_statfs, rc = -ENODEV);
2355
2356         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2357         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2358         if (rc)
2359                 GOTO(out_statfs, rc);
2360 out_statfs:
2361         if (buf)
2362                 obd_ioctl_freedata(buf, len);
2363         return rc;
2364 }
2365
2366 int ll_process_config(struct lustre_cfg *lcfg)
2367 {
2368         struct super_block *sb;
2369         unsigned long x;
2370         int rc = 0;
2371         char *ptr;
2372
2373         /* The instance name contains the sb: lustre-client-aacfe000 */
2374         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2375         if (!ptr || !*(++ptr))
2376                 return -EINVAL;
2377         if (sscanf(ptr, "%lx", &x) != 1)
2378                 return -EINVAL;
2379         sb = (struct super_block *)x;
2380         /* This better be a real Lustre superblock! */
2381         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2382
2383         /* Note we have not called client_common_fill_super yet, so
2384            proc fns must be able to handle that! */
2385         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2386                                       lcfg, sb);
2387         if (rc > 0)
2388                 rc = 0;
2389         return rc;
2390 }
2391
2392 /* this function prepares md_op_data hint for passing it down to MD stack. */
2393 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2394                                       struct inode *i1, struct inode *i2,
2395                                       const char *name, size_t namelen,
2396                                       __u32 mode, __u32 opc, void *data)
2397 {
2398         LASSERT(i1 != NULL);
2399
2400         if (name == NULL) {
2401                 /* Do not reuse namelen for something else. */
2402                 if (namelen != 0)
2403                         return ERR_PTR(-EINVAL);
2404         } else {
2405                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2406                         return ERR_PTR(-ENAMETOOLONG);
2407
2408                 if (!lu_name_is_valid_2(name, namelen))
2409                         return ERR_PTR(-EINVAL);
2410         }
2411
2412         if (op_data == NULL)
2413                 OBD_ALLOC_PTR(op_data);
2414
2415         if (op_data == NULL)
2416                 return ERR_PTR(-ENOMEM);
2417
2418         ll_i2gids(op_data->op_suppgids, i1, i2);
2419         op_data->op_fid1 = *ll_inode2fid(i1);
2420         op_data->op_default_stripe_offset = -1;
2421         if (S_ISDIR(i1->i_mode)) {
2422                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2423                 if (opc == LUSTRE_OPC_MKDIR)
2424                         op_data->op_default_stripe_offset =
2425                                    ll_i2info(i1)->lli_def_stripe_offset;
2426         }
2427
2428         if (i2) {
2429                 op_data->op_fid2 = *ll_inode2fid(i2);
2430                 if (S_ISDIR(i2->i_mode))
2431                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2432         } else {
2433                 fid_zero(&op_data->op_fid2);
2434         }
2435
2436         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2437                 op_data->op_cli_flags |= CLI_HASH64;
2438
2439         if (ll_need_32bit_api(ll_i2sbi(i1)))
2440                 op_data->op_cli_flags |= CLI_API32;
2441
2442         op_data->op_name = name;
2443         op_data->op_namelen = namelen;
2444         op_data->op_mode = mode;
2445         op_data->op_mod_time = cfs_time_current_sec();
2446         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2447         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2448         op_data->op_cap = cfs_curproc_cap_pack();
2449         op_data->op_bias = 0;
2450         op_data->op_cli_flags = 0;
2451         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2452              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2453                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2454         } else {
2455                 op_data->op_mds = 0;
2456         }
2457         op_data->op_data = data;
2458
2459         /* When called by ll_setattr_raw, file is i1. */
2460         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2461                 op_data->op_bias |= MDS_DATA_MODIFIED;
2462
2463         return op_data;
2464 }
2465
2466 void ll_finish_md_op_data(struct md_op_data *op_data)
2467 {
2468         OBD_FREE_PTR(op_data);
2469 }
2470
2471 #ifdef HAVE_SUPEROPS_USE_DENTRY
2472 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2473 #else
2474 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2475 #endif
2476 {
2477         struct ll_sb_info *sbi;
2478
2479 #ifdef HAVE_SUPEROPS_USE_DENTRY
2480         LASSERT((seq != NULL) && (dentry != NULL));
2481         sbi = ll_s2sbi(dentry->d_sb);
2482 #else
2483         LASSERT((seq != NULL) && (vfs != NULL));
2484         sbi = ll_s2sbi(vfs->mnt_sb);
2485 #endif
2486
2487         if (sbi->ll_flags & LL_SBI_NOLCK)
2488                 seq_puts(seq, ",nolock");
2489
2490         if (sbi->ll_flags & LL_SBI_FLOCK)
2491                 seq_puts(seq, ",flock");
2492
2493         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2494                 seq_puts(seq, ",localflock");
2495
2496         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2497                 seq_puts(seq, ",user_xattr");
2498
2499         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2500                 seq_puts(seq, ",lazystatfs");
2501
2502         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2503                 seq_puts(seq, ",user_fid2path");
2504
2505         RETURN(0);
2506 }
2507
2508 /**
2509  * Get obd name by cmd, and copy out to user space
2510  */
2511 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2512 {
2513         struct ll_sb_info *sbi = ll_i2sbi(inode);
2514         struct obd_device *obd;
2515         ENTRY;
2516
2517         if (cmd == OBD_IOC_GETDTNAME)
2518                 obd = class_exp2obd(sbi->ll_dt_exp);
2519         else if (cmd == OBD_IOC_GETMDNAME)
2520                 obd = class_exp2obd(sbi->ll_md_exp);
2521         else
2522                 RETURN(-EINVAL);
2523
2524         if (!obd)
2525                 RETURN(-ENOENT);
2526
2527         if (copy_to_user((void __user *)arg, obd->obd_name,
2528                          strlen(obd->obd_name) + 1))
2529                 RETURN(-EFAULT);
2530
2531         RETURN(0);
2532 }
2533
2534 /**
2535  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2536  * fsname will be returned in this buffer; otherwise, a static buffer will be
2537  * used to store the fsname and returned to caller.
2538  */
2539 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2540 {
2541         static char fsname_static[MTI_NAME_MAXLEN];
2542         struct lustre_sb_info *lsi = s2lsi(sb);
2543         char *ptr;
2544         int len;
2545
2546         if (buf == NULL) {
2547                 /* this means the caller wants to use static buffer
2548                  * and it doesn't care about race. Usually this is
2549                  * in error reporting path */
2550                 buf = fsname_static;
2551                 buflen = sizeof(fsname_static);
2552         }
2553
2554         len = strlen(lsi->lsi_lmd->lmd_profile);
2555         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2556         if (ptr && (strcmp(ptr, "-client") == 0))
2557                 len -= 7;
2558
2559         if (unlikely(len >= buflen))
2560                 len = buflen - 1;
2561         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2562         buf[len] = '\0';
2563
2564         return buf;
2565 }
2566
2567 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2568 {
2569         char *path = NULL;
2570
2571         struct path p;
2572
2573         p.dentry = dentry;
2574         p.mnt = current->fs->root.mnt;
2575         path_get(&p);
2576         path = d_path(&p, buf, bufsize);
2577         path_put(&p);
2578         return path;
2579 }
2580
2581 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2582 {
2583         char *buf, *path = NULL;
2584         struct dentry *dentry = NULL;
2585         struct inode *inode = page->mapping->host;
2586
2587         /* this can be called inside spin lock so use GFP_ATOMIC. */
2588         buf = (char *)__get_free_page(GFP_ATOMIC);
2589         if (buf != NULL) {
2590                 dentry = d_find_alias(page->mapping->host);
2591                 if (dentry != NULL)
2592                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2593         }
2594
2595         CDEBUG(D_WARNING,
2596                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2597                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2598                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2599                PFID(ll_inode2fid(inode)),
2600                (path && !IS_ERR(path)) ? path : "", ioret);
2601
2602         if (dentry != NULL)
2603                 dput(dentry);
2604
2605         if (buf != NULL)
2606                 free_page((unsigned long)buf);
2607 }
2608
2609 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2610                         struct lov_user_md **kbuf)
2611 {
2612         struct lov_user_md      lum;
2613         ssize_t                 lum_size;
2614         ENTRY;
2615
2616         if (copy_from_user(&lum, md, sizeof(lum)))
2617                 RETURN(-EFAULT);
2618
2619         lum_size = ll_lov_user_md_size(&lum);
2620         if (lum_size < 0)
2621                 RETURN(lum_size);
2622
2623         OBD_ALLOC(*kbuf, lum_size);
2624         if (*kbuf == NULL)
2625                 RETURN(-ENOMEM);
2626
2627         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2628                 OBD_FREE(*kbuf, lum_size);
2629                 RETURN(-EFAULT);
2630         }
2631
2632         RETURN(lum_size);
2633 }
2634
2635 /*
2636  * Compute llite root squash state after a change of root squash
2637  * configuration setting or add/remove of a lnet nid
2638  */
2639 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2640 {
2641         struct root_squash_info *squash = &sbi->ll_squash;
2642         int i;
2643         bool matched;
2644         lnet_process_id_t id;
2645
2646         /* Update norootsquash flag */
2647         down_write(&squash->rsi_sem);
2648         if (list_empty(&squash->rsi_nosquash_nids))
2649                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2650         else {
2651                 /* Do not apply root squash as soon as one of our NIDs is
2652                  * in the nosquash_nids list */
2653                 matched = false;
2654                 i = 0;
2655                 while (LNetGetId(i++, &id) != -ENOENT) {
2656                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2657                                 continue;
2658                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2659                                 matched = true;
2660                                 break;
2661                         }
2662                 }
2663                 if (matched)
2664                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2665                 else
2666                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2667         }
2668         up_write(&squash->rsi_sem);
2669 }
2670
2671 /**
2672  * Parse linkea content to extract information about a given hardlink
2673  *
2674  * \param[in]   ldata      - Initialized linkea data
2675  * \param[in]   linkno     - Link identifier
2676  * \param[out]  parent_fid - The entry's parent FID
2677  * \param[out]  ln         - Entry name destination buffer
2678  *
2679  * \retval 0 on success
2680  * \retval Appropriate negative error code on failure
2681  */
2682 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2683                             struct lu_fid *parent_fid, struct lu_name *ln)
2684 {
2685         unsigned int    idx;
2686         int             rc;
2687         ENTRY;
2688
2689         rc = linkea_init(ldata);
2690         if (rc < 0)
2691                 RETURN(rc);
2692
2693         if (linkno >= ldata->ld_leh->leh_reccount)
2694                 /* beyond last link */
2695                 RETURN(-ENODATA);
2696
2697         linkea_first_entry(ldata);
2698         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2699                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2700                                     parent_fid);
2701                 if (idx == linkno)
2702                         break;
2703
2704                 linkea_next_entry(ldata);
2705         }
2706
2707         if (idx < linkno)
2708                 RETURN(-ENODATA);
2709
2710         RETURN(0);
2711 }
2712
2713 /**
2714  * Get parent FID and name of an identified link. Operation is performed for
2715  * a given link number, letting the caller iterate over linkno to list one or
2716  * all links of an entry.
2717  *
2718  * \param[in]     file - File descriptor against which to perform the operation
2719  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2720  *                       on and the available size. It is eventually filled with
2721  *                       the requested information or left untouched on error
2722  *
2723  * \retval - 0 on success
2724  * \retval - Appropriate negative error code on failure
2725  */
2726 int ll_getparent(struct file *file, struct getparent __user *arg)
2727 {
2728         struct dentry           *dentry = file->f_path.dentry;
2729         struct inode            *inode = dentry->d_inode;
2730         struct linkea_data      *ldata;
2731         struct lu_buf            buf = LU_BUF_NULL;
2732         struct lu_name           ln;
2733         struct lu_fid            parent_fid;
2734         __u32                    linkno;
2735         __u32                    name_size;
2736         int                      rc;
2737
2738         ENTRY;
2739
2740         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2741             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2742                 RETURN(-EPERM);
2743
2744         if (get_user(name_size, &arg->gp_name_size))
2745                 RETURN(-EFAULT);
2746
2747         if (get_user(linkno, &arg->gp_linkno))
2748                 RETURN(-EFAULT);
2749
2750         if (name_size > PATH_MAX)
2751                 RETURN(-EINVAL);
2752
2753         OBD_ALLOC(ldata, sizeof(*ldata));
2754         if (ldata == NULL)
2755                 RETURN(-ENOMEM);
2756
2757         rc = linkea_data_new(ldata, &buf);
2758         if (rc < 0)
2759                 GOTO(ldata_free, rc);
2760
2761         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2762         if (rc < 0)
2763                 GOTO(lb_free, rc);
2764
2765         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2766         if (rc < 0)
2767                 GOTO(lb_free, rc);
2768
2769         if (ln.ln_namelen >= name_size)
2770                 GOTO(lb_free, rc = -EOVERFLOW);
2771
2772         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2773                 GOTO(lb_free, rc = -EFAULT);
2774
2775         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2776                 GOTO(lb_free, rc = -EFAULT);
2777
2778         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2779                 GOTO(lb_free, rc = -EFAULT);
2780
2781 lb_free:
2782         lu_buf_free(&buf);
2783 ldata_free:
2784         OBD_FREE(ldata, sizeof(*ldata));
2785
2786         RETURN(rc);
2787 }