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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/statfs.h>
  41 #include <linux/time.h>
  42 #include <linux/types.h>
  43 #include <linux/version.h>
  44 #include <linux/mm.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <linux/security.h>
  50
  51 #include <lustre_ioctl.h>
  52 #include <lustre_ha.h>
  53 #include <lustre_dlm.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_disk.h>
  56 #include <lustre_param.h>
  57 #include <lustre_log.h>
  58 #include <cl_object.h>
  59 #include <obd_cksum.h>
  60 #include "llite_internal.h"
  61
  62 struct kmem_cache *ll_file_data_slab;
  63
  64 #ifndef log2
  65 #define log2(n) ffz(~(n))
  66 #endif
  67
  68 static struct ll_sb_info *ll_init_sbi(void)
  69 {
  70         struct ll_sb_info *sbi = NULL;
  71         unsigned long pages;
  72         unsigned long lru_page_max;
  73         struct sysinfo si;
  74         class_uuid_t uuid;
  75         int i;
  76         ENTRY;
  77
  78         OBD_ALLOC_PTR(sbi);
  79         if (sbi == NULL)
  80                 RETURN(NULL);
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         lru_page_max = pages / 2;
  91
  92         /* initialize ll_cache data */
  93         sbi->ll_cache = cl_cache_init(lru_page_max);
  94         if (sbi->ll_cache == NULL) {
  95                 OBD_FREE(sbi, sizeof(*sbi));
  96                 RETURN(NULL);
  97         }
  98
  99         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 100                                            SBI_DEFAULT_READAHEAD_MAX);
 101         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 102         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 103                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 104
 105         ll_generate_random_uuid(uuid);
 106         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 107         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 108
 109         sbi->ll_flags |= LL_SBI_VERBOSE;
 110 #ifdef ENABLE_CHECKSUM
 111         sbi->ll_flags |= LL_SBI_CHECKSUM;
 112 #endif
 113
 114 #ifdef HAVE_LRU_RESIZE_SUPPORT
 115         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 116 #endif
 117         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 118
 119         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 120                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 121                                pp_r_hist.oh_lock);
 122                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 123                                pp_w_hist.oh_lock);
 124         }
 125
 126         /* metadata statahead is enabled by default */
 127         sbi->ll_sa_max = LL_SA_RPC_DEF;
 128         atomic_set(&sbi->ll_sa_total, 0);
 129         atomic_set(&sbi->ll_sa_wrong, 0);
 130         atomic_set(&sbi->ll_sa_running, 0);
 131         atomic_set(&sbi->ll_agl_total, 0);
 132         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 133         sbi->ll_flags |= LL_SBI_FAST_READ;
 134
 135         /* root squash */
 136         sbi->ll_squash.rsi_uid = 0;
 137         sbi->ll_squash.rsi_gid = 0;
 138         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 139         init_rwsem(&sbi->ll_squash.rsi_sem);
 140
 141         RETURN(sbi);
 142 }
 143
 144 static void ll_free_sbi(struct super_block *sb)
 145 {
 146         struct ll_sb_info *sbi = ll_s2sbi(sb);
 147         ENTRY;
 148
 149         if (sbi != NULL) {
 150                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 151                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 152                 if (sbi->ll_cache != NULL) {
 153                         cl_cache_decref(sbi->ll_cache);
 154                         sbi->ll_cache = NULL;
 155                 }
 156                 OBD_FREE(sbi, sizeof(*sbi));
 157         }
 158         EXIT;
 159 }
 160
 161 static inline int obd_connect_has_secctx(struct obd_connect_data *data)
 162 {
 163         return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
 164                data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
 165 }
 166
 167 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 168                                     struct vfsmount *mnt)
 169 {
 170         struct inode *root = NULL;
 171         struct ll_sb_info *sbi = ll_s2sbi(sb);
 172         struct obd_device *obd;
 173         struct obd_statfs *osfs = NULL;
 174         struct ptlrpc_request *request = NULL;
 175         struct obd_connect_data *data = NULL;
 176         struct obd_uuid *uuid;
 177         struct md_op_data *op_data;
 178         struct lustre_md lmd;
 179         u64 valid;
 180         int size, err, checksum;
 181         ENTRY;
 182
 183         obd = class_name2obd(md);
 184         if (!obd) {
 185                 CERROR("MD %s: not setup or attached\n", md);
 186                 RETURN(-EINVAL);
 187         }
 188
 189         OBD_ALLOC_PTR(data);
 190         if (data == NULL)
 191                 RETURN(-ENOMEM);
 192
 193         OBD_ALLOC_PTR(osfs);
 194         if (osfs == NULL) {
 195                 OBD_FREE_PTR(data);
 196                 RETURN(-ENOMEM);
 197         }
 198
 199         /* indicate the features supported by this client */
 200         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 201                                   OBD_CONNECT_ATTRFID  |
 202                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 203                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 204                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 205                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 206                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 207                                   OBD_CONNECT_64BITHASH |
 208                                   OBD_CONNECT_EINPROGRESS |
 209                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 210                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 211                                   OBD_CONNECT_MAX_EASIZE |
 212                                   OBD_CONNECT_FLOCK_DEAD |
 213                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 214                                   OBD_CONNECT_OPEN_BY_FID |
 215                                   OBD_CONNECT_DIR_STRIPE |
 216                                   OBD_CONNECT_BULK_MBITS |
 217                                   OBD_CONNECT_SUBTREE |
 218                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_MULTIMODRPCS;
 219
 220         data->ocd_connect_flags2 = 0;
 221
 222 #ifdef HAVE_LRU_RESIZE_SUPPORT
 223         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 224                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 225 #endif
 226 #ifdef CONFIG_FS_POSIX_ACL
 227         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 228 #endif
 229
 230         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 231                 /* flag mdc connection as lightweight, only used for test
 232                  * purpose, use with care */
 233                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 234
 235         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 236         data->ocd_version = LUSTRE_VERSION_CODE;
 237
 238         if (sb->s_flags & MS_RDONLY)
 239                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 240         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 241                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 242
 243         if (sbi->ll_flags & LL_SBI_FLOCK)
 244                 sbi->ll_fop = &ll_file_operations_flock;
 245         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 246                 sbi->ll_fop = &ll_file_operations;
 247         else
 248                 sbi->ll_fop = &ll_file_operations_noflock;
 249
 250         /* always ping even if server suppress_pings */
 251         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 252                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 253
 254 #ifdef HAVE_SECURITY_DENTRY_INIT_SECURITY
 255         data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
 256 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
 257
 258         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 259
 260         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 261         if (err == -EBUSY) {
 262                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 263                                    "recovery, of which this client is not a "
 264                                    "part. Please wait for recovery to complete,"
 265                                    " abort, or time out.\n", md);
 266                 GOTO(out, err);
 267         } else if (err) {
 268                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 269                 GOTO(out, err);
 270         }
 271
 272         sbi->ll_md_exp->exp_connect_data = *data;
 273
 274         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 275                            LUSTRE_SEQ_METADATA);
 276         if (err) {
 277                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 278                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 279                 GOTO(out_md, err);
 280         }
 281
 282         /* For mount, we only need fs info from MDT0, and also in DNE, it
 283          * can make sure the client can be mounted as long as MDT0 is
 284          * avaible */
 285         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 286                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 287                         OBD_STATFS_FOR_MDT0);
 288         if (err)
 289                 GOTO(out_md_fid, err);
 290
 291         /* This needs to be after statfs to ensure connect has finished.
 292          * Note that "data" does NOT contain the valid connect reply.
 293          * If connecting to a 1.8 server there will be no LMV device, so
 294          * we can access the MDC export directly and exp_connect_flags will
 295          * be non-zero, but if accessing an upgraded 2.1 server it will
 296          * have the correct flags filled in.
 297          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 298         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 299         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 300             valid != CLIENT_CONNECT_MDT_REQD) {
 301                 char *buf;
 302
 303                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 304                 obd_connect_flags2str(buf, PAGE_SIZE,
 305                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 306                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 307                                    "feature(s) needed for correct operation "
 308                                    "of this client (%s). Please upgrade "
 309                                    "server or downgrade client.\n",
 310                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 311                 OBD_FREE(buf, PAGE_SIZE);
 312                 GOTO(out_md_fid, err = -EPROTO);
 313         }
 314
 315         size = sizeof(*data);
 316         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 317                            KEY_CONN_DATA,  &size, data);
 318         if (err) {
 319                 CERROR("%s: Get connect data failed: rc = %d\n",
 320                        sbi->ll_md_exp->exp_obd->obd_name, err);
 321                 GOTO(out_md_fid, err);
 322         }
 323
 324         LASSERT(osfs->os_bsize);
 325         sb->s_blocksize = osfs->os_bsize;
 326         sb->s_blocksize_bits = log2(osfs->os_bsize);
 327         sb->s_magic = LL_SUPER_MAGIC;
 328         sb->s_maxbytes = MAX_LFS_FILESIZE;
 329         sbi->ll_namelen = osfs->os_namelen;
 330         sbi->ll_mnt.mnt = current->fs->root.mnt;
 331
 332         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 333             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 334                 LCONSOLE_INFO("Disabling user_xattr feature because "
 335                               "it is not supported on the server\n");
 336                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 337         }
 338
 339         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 340 #ifdef MS_POSIXACL
 341                 sb->s_flags |= MS_POSIXACL;
 342 #endif
 343                 sbi->ll_flags |= LL_SBI_ACL;
 344         } else {
 345                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 346 #ifdef MS_POSIXACL
 347                 sb->s_flags &= ~MS_POSIXACL;
 348 #endif
 349                 sbi->ll_flags &= ~LL_SBI_ACL;
 350         }
 351
 352         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 353                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 354
 355         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 356                 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_SHIFT;
 357         else
 358                 sbi->ll_md_brw_pages = 1;
 359
 360         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 361                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 362
 363         if (obd_connect_has_secctx(data))
 364                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 365
 366         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 367                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 368                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 369                                       "unknown maximum xattr size.\n", dt);
 370                 } else {
 371                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 372                         sbi->ll_xattr_cache_enabled = 1;
 373                 }
 374         }
 375
 376         obd = class_name2obd(dt);
 377         if (!obd) {
 378                 CERROR("DT %s: not setup or attached\n", dt);
 379                 GOTO(out_md_fid, err = -ENODEV);
 380         }
 381
 382         /* pass client page size via ocd_grant_blkbits, the server should report
 383          * back its backend blocksize for grant calculation purpose */
 384         data->ocd_grant_blkbits = PAGE_SHIFT;
 385
 386         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 387                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 388                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 389                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 390                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 391                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 392                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 393                                   OBD_CONNECT_EINPROGRESS |
 394                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 395                                   OBD_CONNECT_LAYOUTLOCK |
 396                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 397                                   OBD_CONNECT_BULK_MBITS;
 398
 399         data->ocd_connect_flags2 = 0;
 400
 401         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 402                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 403
 404         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 405          * disabled by default, because it can still be enabled on the
 406          * fly via /proc. As a consequence, we still need to come to an
 407          * agreement on the supported algorithms at connect time */
 408         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 409
 410         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 411                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 412         else
 413                 data->ocd_cksum_types = cksum_types_supported_client();
 414
 415 #ifdef HAVE_LRU_RESIZE_SUPPORT
 416         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 417 #endif
 418         /* always ping even if server suppress_pings */
 419         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 420                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 421
 422         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 423                "ocd_grant: %d\n", data->ocd_connect_flags,
 424                data->ocd_version, data->ocd_grant);
 425
 426         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 427         obd->obd_upcall.onu_upcall = cl_ocd_update;
 428
 429         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 430
 431         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 432                           NULL);
 433         if (err == -EBUSY) {
 434                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 435                                    "recovery, of which this client is not a "
 436                                    "part.  Please wait for recovery to "
 437                                    "complete, abort, or time out.\n", dt);
 438                 GOTO(out_md, err);
 439         } else if (err) {
 440                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 441                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 442                 GOTO(out_md, err);
 443         }
 444
 445         sbi->ll_dt_exp->exp_connect_data = *data;
 446
 447         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 448                            LUSTRE_SEQ_METADATA);
 449         if (err) {
 450                 CERROR("%s: Can't init data layer FID infrastructure, "
 451                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 452                 GOTO(out_dt, err);
 453         }
 454
 455         mutex_lock(&sbi->ll_lco.lco_lock);
 456         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 457         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 458         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 459         mutex_unlock(&sbi->ll_lco.lco_lock);
 460
 461         fid_zero(&sbi->ll_root_fid);
 462         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 463                            &sbi->ll_root_fid);
 464         if (err) {
 465                 CERROR("cannot mds_connect: rc = %d\n", err);
 466                 GOTO(out_lock_cn_cb, err);
 467         }
 468         if (!fid_is_sane(&sbi->ll_root_fid)) {
 469                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 470                        sbi->ll_md_exp->exp_obd->obd_name,
 471                        PFID(&sbi->ll_root_fid));
 472                 GOTO(out_lock_cn_cb, err = -EINVAL);
 473         }
 474         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 475
 476         sb->s_op = &lustre_super_operations;
 477 #if THREAD_SIZE >= 8192 /*b=17630*/
 478         sb->s_export_op = &lustre_export_operations;
 479 #endif
 480
 481         /* make root inode
 482          * XXX: move this to after cbd setup? */
 483         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 484         if (sbi->ll_flags & LL_SBI_ACL)
 485                 valid |= OBD_MD_FLACL;
 486
 487         OBD_ALLOC_PTR(op_data);
 488         if (op_data == NULL)
 489                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 490
 491         op_data->op_fid1 = sbi->ll_root_fid;
 492         op_data->op_mode = 0;
 493         op_data->op_valid = valid;
 494
 495         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 496
 497         OBD_FREE_PTR(op_data);
 498         if (err) {
 499                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 500                        sbi->ll_md_exp->exp_obd->obd_name, err);
 501                 GOTO(out_lock_cn_cb, err);
 502         }
 503
 504         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 505                                sbi->ll_md_exp, &lmd);
 506         if (err) {
 507                 CERROR("failed to understand root inode md: rc = %d\n", err);
 508                 ptlrpc_req_finished(request);
 509                 GOTO(out_lock_cn_cb, err);
 510         }
 511
 512         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 513         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 514                                             sbi->ll_flags & LL_SBI_32BIT_API),
 515                        &lmd);
 516         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 517         ptlrpc_req_finished(request);
 518
 519         if (IS_ERR(root)) {
 520 #ifdef CONFIG_FS_POSIX_ACL
 521                 if (lmd.posix_acl) {
 522                         posix_acl_release(lmd.posix_acl);
 523                         lmd.posix_acl = NULL;
 524                 }
 525 #endif
 526                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 527                 root = NULL;
 528                 CERROR("lustre_lite: bad iget4 for root\n");
 529                 GOTO(out_root, err);
 530         }
 531
 532         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 533         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 534                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 535                                  NULL);
 536         if (err) {
 537                 CERROR("%s: Set checksum failed: rc = %d\n",
 538                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 539                 GOTO(out_root, err);
 540         }
 541         cl_sb_init(sb);
 542
 543         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 544                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 545                                  sbi->ll_cache, NULL);
 546         if (err) {
 547                 CERROR("%s: Set cache_set failed: rc = %d\n",
 548                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 549                 GOTO(out_root, err);
 550         }
 551
 552         sb->s_root = d_make_root(root);
 553         if (sb->s_root == NULL) {
 554                 CERROR("%s: can't make root dentry\n",
 555                         ll_get_fsname(sb, NULL, 0));
 556                 GOTO(out_root, err = -ENOMEM);
 557         }
 558 #ifdef HAVE_DCACHE_LOCK
 559         sb->s_root->d_op = &ll_d_ops;
 560 #endif
 561
 562         sbi->ll_sdev_orig = sb->s_dev;
 563
 564         /* We set sb->s_dev equal on all lustre clients in order to support
 565          * NFS export clustering.  NFSD requires that the FSID be the same
 566          * on all clients. */
 567         /* s_dev is also used in lt_compare() to compare two fs, but that is
 568          * only a node-local comparison. */
 569         uuid = obd_get_uuid(sbi->ll_md_exp);
 570         if (uuid != NULL)
 571                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 572
 573         if (data != NULL)
 574                 OBD_FREE_PTR(data);
 575         if (osfs != NULL)
 576                 OBD_FREE_PTR(osfs);
 577         if (proc_lustre_fs_root != NULL) {
 578                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 579                                                   dt, md);
 580                 if (err < 0) {
 581                         CERROR("%s: could not register mount in lprocfs: "
 582                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 583                         err = 0;
 584                 }
 585         }
 586
 587         RETURN(err);
 588 out_root:
 589         if (root)
 590                 iput(root);
 591 out_lock_cn_cb:
 592         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 593 out_dt:
 594         obd_disconnect(sbi->ll_dt_exp);
 595         sbi->ll_dt_exp = NULL;
 596 out_md_fid:
 597         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 598 out_md:
 599         obd_disconnect(sbi->ll_md_exp);
 600         sbi->ll_md_exp = NULL;
 601 out:
 602         if (data != NULL)
 603                 OBD_FREE_PTR(data);
 604         if (osfs != NULL)
 605                 OBD_FREE_PTR(osfs);
 606         return err;
 607 }
 608
 609 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 610 {
 611         int size, rc;
 612
 613         size = sizeof(*lmmsize);
 614         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 615                           KEY_MAX_EASIZE, &size, lmmsize);
 616         if (rc != 0) {
 617                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 618                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 619                 RETURN(rc);
 620         }
 621
 622         size = sizeof(int);
 623         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 624                           KEY_MAX_EASIZE, &size, lmmsize);
 625         if (rc)
 626                 CERROR("Get max mdsize error rc %d\n", rc);
 627
 628         RETURN(rc);
 629 }
 630
 631 /**
 632  * Get the value of the default_easize parameter.
 633  *
 634  * \see client_obd::cl_default_mds_easize
 635  *
 636  * \param[in] sbi       superblock info for this filesystem
 637  * \param[out] lmmsize  pointer to storage location for value
 638  *
 639  * \retval 0            on success
 640  * \retval negative     negated errno on failure
 641  */
 642 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 643 {
 644         int size, rc;
 645
 646         size = sizeof(int);
 647         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 648                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 649         if (rc)
 650                 CERROR("Get default mdsize error rc %d\n", rc);
 651
 652         RETURN(rc);
 653 }
 654
 655 /**
 656  * Set the default_easize parameter to the given value.
 657  *
 658  * \see client_obd::cl_default_mds_easize
 659  *
 660  * \param[in] sbi       superblock info for this filesystem
 661  * \param[in] lmmsize   the size to set
 662  *
 663  * \retval 0            on success
 664  * \retval negative     negated errno on failure
 665  */
 666 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 667 {
 668         int rc;
 669
 670         if (lmmsize < sizeof(struct lov_mds_md) ||
 671             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 672                 return -EINVAL;
 673
 674         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 675                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 676                                 sizeof(int), &lmmsize, NULL);
 677
 678         RETURN(rc);
 679 }
 680
 681 static void ll_dump_inode(struct inode *inode)
 682 {
 683         struct ll_d_hlist_node *tmp;
 684         int dentry_count = 0;
 685
 686         LASSERT(inode != NULL);
 687
 688         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 689                 dentry_count++;
 690
 691         CERROR("%s: inode %p dump: dev=%s fid="DFID
 692                " mode=%o count=%u, %d dentries\n",
 693                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 694                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 695                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 696 }
 697
 698 void lustre_dump_dentry(struct dentry *dentry, int recur)
 699 {
 700         struct list_head *tmp;
 701         int subdirs = 0;
 702
 703         LASSERT(dentry != NULL);
 704
 705         list_for_each(tmp, &dentry->d_subdirs)
 706                 subdirs++;
 707
 708         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 709                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 710                dentry->d_name.len, dentry->d_name.name,
 711                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 712                dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
 713                dentry->d_flags, dentry->d_fsdata, subdirs);
 714         if (dentry->d_inode != NULL)
 715                 ll_dump_inode(dentry->d_inode);
 716
 717         if (recur == 0)
 718                 return;
 719
 720         list_for_each(tmp, &dentry->d_subdirs) {
 721                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
 722                 lustre_dump_dentry(d, recur - 1);
 723         }
 724 }
 725
 726 static void client_common_put_super(struct super_block *sb)
 727 {
 728         struct ll_sb_info *sbi = ll_s2sbi(sb);
 729         ENTRY;
 730
 731         cl_sb_fini(sb);
 732
 733         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 734         obd_disconnect(sbi->ll_dt_exp);
 735         sbi->ll_dt_exp = NULL;
 736
 737         lprocfs_unregister_mountpoint(sbi);
 738
 739         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 740         obd_disconnect(sbi->ll_md_exp);
 741         sbi->ll_md_exp = NULL;
 742
 743         EXIT;
 744 }
 745
 746 void ll_kill_super(struct super_block *sb)
 747 {
 748         struct ll_sb_info *sbi;
 749         ENTRY;
 750
 751         /* not init sb ?*/
 752         if (!(sb->s_flags & MS_ACTIVE))
 753                 return;
 754
 755         sbi = ll_s2sbi(sb);
 756         /* we need restore s_dev from changed for clustred NFS before put_super
 757          * because new kernels have cached s_dev and change sb->s_dev in
 758          * put_super not affected real removing devices */
 759         if (sbi) {
 760                 sb->s_dev = sbi->ll_sdev_orig;
 761                 sbi->ll_umounting = 1;
 762
 763                 /* wait running statahead threads to quit */
 764                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 765                         set_current_state(TASK_UNINTERRUPTIBLE);
 766                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 767                 }
 768         }
 769
 770         EXIT;
 771 }
 772
 773 static inline int ll_set_opt(const char *opt, char *data, int fl)
 774 {
 775         if (strncmp(opt, data, strlen(opt)) != 0)
 776                 return(0);
 777         else
 778                 return(fl);
 779 }
 780
 781 /* non-client-specific mount options are parsed in lmd_parse */
 782 static int ll_options(char *options, int *flags)
 783 {
 784         int tmp;
 785         char *s1 = options, *s2;
 786         ENTRY;
 787
 788         if (!options)
 789                 RETURN(0);
 790
 791         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 792
 793         while (*s1) {
 794                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 795                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 796                 if (tmp) {
 797                         *flags |= tmp;
 798                         goto next;
 799                 }
 800                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 801                 if (tmp) {
 802                         *flags |= tmp;
 803                         goto next;
 804                 }
 805                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 806                 if (tmp) {
 807                         *flags |= tmp;
 808                         goto next;
 809                 }
 810                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 811                 if (tmp) {
 812                         *flags &= ~tmp;
 813                         goto next;
 814                 }
 815                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 816                 if (tmp) {
 817                         *flags |= tmp;
 818                         goto next;
 819                 }
 820                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 821                 if (tmp) {
 822                         *flags &= ~tmp;
 823                         goto next;
 824                 }
 825                 tmp = ll_set_opt("context", s1, 1);
 826                 if (tmp)
 827                         goto next;
 828                 tmp = ll_set_opt("fscontext", s1, 1);
 829                 if (tmp)
 830                         goto next;
 831                 tmp = ll_set_opt("defcontext", s1, 1);
 832                 if (tmp)
 833                         goto next;
 834                 tmp = ll_set_opt("rootcontext", s1, 1);
 835                 if (tmp)
 836                         goto next;
 837                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 838                 if (tmp) {
 839                         *flags |= tmp;
 840                         goto next;
 841                 }
 842                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 843                 if (tmp) {
 844                         *flags &= ~tmp;
 845                         goto next;
 846                 }
 847
 848                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 849                 if (tmp) {
 850                         *flags |= tmp;
 851                         goto next;
 852                 }
 853                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 854                 if (tmp) {
 855                         *flags &= ~tmp;
 856                         goto next;
 857                 }
 858                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 859                 if (tmp) {
 860                         *flags |= tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 864                 if (tmp) {
 865                         *flags &= ~tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 869                 if (tmp) {
 870                         *flags |= tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 874                 if (tmp) {
 875                         *flags &= ~tmp;
 876                         goto next;
 877                 }
 878                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 879                 if (tmp) {
 880                         *flags |= tmp;
 881                         goto next;
 882                 }
 883                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 884                 if (tmp) {
 885                         *flags |= tmp;
 886                         goto next;
 887                 }
 888                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 889                 if (tmp) {
 890                         *flags &= ~tmp;
 891                         goto next;
 892                 }
 893                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 894                 if (tmp) {
 895                         *flags |= tmp;
 896                         goto next;
 897                 }
 898                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 899                                    s1);
 900                 RETURN(-EINVAL);
 901
 902 next:
 903                 /* Find next opt */
 904                 s2 = strchr(s1, ',');
 905                 if (s2 == NULL)
 906                         break;
 907                 s1 = s2 + 1;
 908         }
 909         RETURN(0);
 910 }
 911
 912 void ll_lli_init(struct ll_inode_info *lli)
 913 {
 914         lli->lli_inode_magic = LLI_INODE_MAGIC;
 915         lli->lli_flags = 0;
 916         spin_lock_init(&lli->lli_lock);
 917         lli->lli_posix_acl = NULL;
 918         /* Do not set lli_fid, it has been initialized already. */
 919         fid_zero(&lli->lli_pfid);
 920         lli->lli_mds_read_och = NULL;
 921         lli->lli_mds_write_och = NULL;
 922         lli->lli_mds_exec_och = NULL;
 923         lli->lli_open_fd_read_count = 0;
 924         lli->lli_open_fd_write_count = 0;
 925         lli->lli_open_fd_exec_count = 0;
 926         mutex_init(&lli->lli_och_mutex);
 927         spin_lock_init(&lli->lli_agl_lock);
 928         spin_lock_init(&lli->lli_layout_lock);
 929         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 930         lli->lli_clob = NULL;
 931
 932         init_rwsem(&lli->lli_xattrs_list_rwsem);
 933         mutex_init(&lli->lli_xattrs_enq_lock);
 934
 935         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 936         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 937                 mutex_init(&lli->lli_readdir_mutex);
 938                 lli->lli_opendir_key = NULL;
 939                 lli->lli_sai = NULL;
 940                 spin_lock_init(&lli->lli_sa_lock);
 941                 lli->lli_opendir_pid = 0;
 942                 lli->lli_sa_enabled = 0;
 943                 lli->lli_def_stripe_offset = -1;
 944         } else {
 945                 mutex_init(&lli->lli_size_mutex);
 946                 lli->lli_symlink_name = NULL;
 947                 init_rwsem(&lli->lli_trunc_sem);
 948                 range_lock_tree_init(&lli->lli_write_tree);
 949                 init_rwsem(&lli->lli_glimpse_sem);
 950                 lli->lli_glimpse_time = 0;
 951                 INIT_LIST_HEAD(&lli->lli_agl_list);
 952                 lli->lli_agl_index = 0;
 953                 lli->lli_async_rc = 0;
 954         }
 955         mutex_init(&lli->lli_layout_mutex);
 956         memset(lli->lli_jobid, 0, LUSTRE_JOBID_SIZE);
 957 }
 958
 959 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 960 {
 961         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 962
 963         bdi->name = "lustre";
 964         return bdi_register(bdi, NULL, "lustre-%d",
 965                             atomic_inc_return(&ll_bdi_num));
 966 }
 967
 968 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 969 {
 970         struct lustre_profile *lprof = NULL;
 971         struct lustre_sb_info *lsi = s2lsi(sb);
 972         struct ll_sb_info *sbi;
 973         char  *dt = NULL, *md = NULL;
 974         char  *profilenm = get_profile_name(sb);
 975         struct config_llog_instance *cfg;
 976         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 977         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 978         int    err;
 979         ENTRY;
 980
 981         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 982
 983         OBD_ALLOC_PTR(cfg);
 984         if (cfg == NULL)
 985                 RETURN(-ENOMEM);
 986
 987         try_module_get(THIS_MODULE);
 988
 989         /* client additional sb info */
 990         lsi->lsi_llsbi = sbi = ll_init_sbi();
 991         if (!sbi) {
 992                 module_put(THIS_MODULE);
 993                 OBD_FREE_PTR(cfg);
 994                 RETURN(-ENOMEM);
 995         }
 996
 997         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 998         if (err)
 999                 GOTO(out_free, err);
1000
1001         err = bdi_init(&lsi->lsi_bdi);
1002         if (err)
1003                 GOTO(out_free, err);
1004         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1005 #ifdef HAVE_BDI_CAP_MAP_COPY
1006         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1007 #else
1008         lsi->lsi_bdi.capabilities = 0;
1009 #endif
1010         err = ll_bdi_register(&lsi->lsi_bdi);
1011         if (err)
1012                 GOTO(out_free, err);
1013
1014         sb->s_bdi = &lsi->lsi_bdi;
1015 #ifndef HAVE_DCACHE_LOCK
1016         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1017         sb->s_d_op = &ll_d_ops;
1018 #endif
1019
1020         /* Generate a string unique to this super, in case some joker tries
1021            to mount the same fs at two mount points.
1022            Use the address of the super itself.*/
1023         cfg->cfg_instance = sb;
1024         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1025         cfg->cfg_callback = class_config_llog_handler;
1026         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
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 (lprof != NULL)
1066                 class_put_profile(lprof);
1067         if (err)
1068                 ll_put_super(sb);
1069         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1070                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1071
1072         OBD_FREE_PTR(cfg);
1073         RETURN(err);
1074 } /* ll_fill_super */
1075
1076 void ll_put_super(struct super_block *sb)
1077 {
1078         struct config_llog_instance cfg, params_cfg;
1079         struct obd_device *obd;
1080         struct lustre_sb_info *lsi = s2lsi(sb);
1081         struct ll_sb_info *sbi = ll_s2sbi(sb);
1082         char *profilenm = get_profile_name(sb);
1083         long ccc_count;
1084         int next, force = 1, rc = 0;
1085         ENTRY;
1086
1087         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1088
1089         cfg.cfg_instance = sb;
1090         lustre_end_log(sb, profilenm, &cfg);
1091
1092         params_cfg.cfg_instance = sb;
1093         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1094
1095         if (sbi->ll_md_exp) {
1096                 obd = class_exp2obd(sbi->ll_md_exp);
1097                 if (obd)
1098                         force = obd->obd_force;
1099         }
1100
1101         /* Wait for unstable pages to be committed to stable storage */
1102         if (force == 0) {
1103                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1104                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1105                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1106                         &lwi);
1107         }
1108
1109         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1110         if (force == 0 && rc != -EINTR)
1111                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1112
1113
1114         /* We need to set force before the lov_disconnect in
1115            lustre_common_put_super, since l_d cleans up osc's as well. */
1116         if (force) {
1117                 next = 0;
1118                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1119                                                      &next)) != NULL) {
1120                         obd->obd_force = force;
1121                 }
1122         }
1123
1124         if (sbi->ll_client_common_fill_super_succeeded) {
1125                 /* Only if client_common_fill_super succeeded */
1126                 client_common_put_super(sb);
1127         }
1128
1129         next = 0;
1130         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1131                 class_manual_cleanup(obd);
1132         }
1133
1134         if (sbi->ll_flags & LL_SBI_VERBOSE)
1135                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1136
1137         if (profilenm)
1138                 class_del_profile(profilenm);
1139
1140         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1141                 bdi_destroy(&lsi->lsi_bdi);
1142                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1143         }
1144
1145         ll_free_sbi(sb);
1146         lsi->lsi_llsbi = NULL;
1147
1148         lustre_common_put_super(sb);
1149
1150         cl_env_cache_purge(~0);
1151
1152         module_put(THIS_MODULE);
1153
1154         EXIT;
1155 } /* client_put_super */
1156
1157 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1158 {
1159         struct inode *inode = NULL;
1160
1161         /* NOTE: we depend on atomic igrab() -bzzz */
1162         lock_res_and_lock(lock);
1163         if (lock->l_resource->lr_lvb_inode) {
1164                 struct ll_inode_info * lli;
1165                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1166                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1167                         inode = igrab(lock->l_resource->lr_lvb_inode);
1168                 } else {
1169                         inode = lock->l_resource->lr_lvb_inode;
1170                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1171                                          D_WARNING, lock, "lr_lvb_inode %p is "
1172                                          "bogus: magic %08x",
1173                                          lock->l_resource->lr_lvb_inode,
1174                                          lli->lli_inode_magic);
1175                         inode = NULL;
1176                 }
1177         }
1178         unlock_res_and_lock(lock);
1179         return inode;
1180 }
1181
1182 void ll_dir_clear_lsm_md(struct inode *inode)
1183 {
1184         struct ll_inode_info *lli = ll_i2info(inode);
1185
1186         LASSERT(S_ISDIR(inode->i_mode));
1187
1188         if (lli->lli_lsm_md != NULL) {
1189                 lmv_free_memmd(lli->lli_lsm_md);
1190                 lli->lli_lsm_md = NULL;
1191         }
1192 }
1193
1194 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1195                                       const struct lu_fid *fid,
1196                                       struct lustre_md *md)
1197 {
1198         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1199         struct mdt_body         *body = md->body;
1200         struct inode            *inode;
1201         ino_t                   ino;
1202         ENTRY;
1203
1204         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1205         inode = iget_locked(sb, ino);
1206         if (inode == NULL) {
1207                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1208                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1209                 RETURN(ERR_PTR(-ENOENT));
1210         }
1211
1212         if (inode->i_state & I_NEW) {
1213                 struct ll_inode_info *lli = ll_i2info(inode);
1214                 struct lmv_stripe_md *lsm = md->lmv;
1215
1216                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1217                                 (body->mbo_mode & S_IFMT);
1218                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1219                          PFID(fid));
1220
1221                 LTIME_S(inode->i_mtime) = 0;
1222                 LTIME_S(inode->i_atime) = 0;
1223                 LTIME_S(inode->i_ctime) = 0;
1224                 inode->i_rdev = 0;
1225
1226 #ifdef HAVE_BACKING_DEV_INFO
1227                 /* initializing backing dev info. */
1228                 inode->i_mapping->backing_dev_info =
1229                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1230 #endif
1231                 inode->i_op = &ll_dir_inode_operations;
1232                 inode->i_fop = &ll_dir_operations;
1233                 lli->lli_fid = *fid;
1234                 ll_lli_init(lli);
1235
1236                 LASSERT(lsm != NULL);
1237                 /* master object FID */
1238                 lli->lli_pfid = body->mbo_fid1;
1239                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1240                        lli, PFID(fid), PFID(&lli->lli_pfid));
1241                 unlock_new_inode(inode);
1242         }
1243
1244         RETURN(inode);
1245 }
1246
1247 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1248 {
1249         struct lu_fid *fid;
1250         struct lmv_stripe_md *lsm = md->lmv;
1251         int i;
1252
1253         LASSERT(lsm != NULL);
1254         /* XXX sigh, this lsm_root initialization should be in
1255          * LMV layer, but it needs ll_iget right now, so we
1256          * put this here right now. */
1257         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1258                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1259                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1260                 /* Unfortunately ll_iget will call ll_update_inode,
1261                  * where the initialization of slave inode is slightly
1262                  * different, so it reset lsm_md to NULL to avoid
1263                  * initializing lsm for slave inode. */
1264                 /* For migrating inode, master stripe and master object will
1265                  * be same, so we only need assign this inode */
1266                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1267                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1268                 else
1269                         lsm->lsm_md_oinfo[i].lmo_root =
1270                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1271
1272                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1273                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1274
1275                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1276                         return rc;
1277                 }
1278         }
1279
1280         return 0;
1281 }
1282
1283 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1284                                 const struct lmv_stripe_md *lsm_md2)
1285 {
1286         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1287                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1288                lsm_md1->lsm_md_master_mdt_index ==
1289                                         lsm_md2->lsm_md_master_mdt_index &&
1290                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1291                lsm_md1->lsm_md_layout_version ==
1292                                         lsm_md2->lsm_md_layout_version &&
1293                strcmp(lsm_md1->lsm_md_pool_name,
1294                       lsm_md2->lsm_md_pool_name) == 0;
1295 }
1296
1297 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1298 {
1299         struct ll_inode_info *lli = ll_i2info(inode);
1300         struct lmv_stripe_md *lsm = md->lmv;
1301         int     rc;
1302         ENTRY;
1303
1304         LASSERT(S_ISDIR(inode->i_mode));
1305         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1306                PFID(ll_inode2fid(inode)));
1307
1308         /* no striped information from request. */
1309         if (lsm == NULL) {
1310                 if (lli->lli_lsm_md == NULL) {
1311                         RETURN(0);
1312                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1313                                                 LMV_HASH_FLAG_MIGRATION) {
1314                         /* migration is done, the temporay MIGRATE layout has
1315                          * been removed */
1316                         CDEBUG(D_INODE, DFID" finish migration.\n",
1317                                PFID(ll_inode2fid(inode)));
1318                         lmv_free_memmd(lli->lli_lsm_md);
1319                         lli->lli_lsm_md = NULL;
1320                         RETURN(0);
1321                 } else {
1322                         /* The lustre_md from req does not include stripeEA,
1323                          * see ll_md_setattr */
1324                         RETURN(0);
1325                 }
1326         }
1327
1328         /* set the directory layout */
1329         if (lli->lli_lsm_md == NULL) {
1330                 struct cl_attr  *attr;
1331
1332                 rc = ll_init_lsm_md(inode, md);
1333                 if (rc != 0)
1334                         RETURN(rc);
1335
1336                 /* set md->lmv to NULL, so the following free lustre_md
1337                  * will not free this lsm */
1338                 md->lmv = NULL;
1339                 lli->lli_lsm_md = lsm;
1340
1341                 OBD_ALLOC_PTR(attr);
1342                 if (attr == NULL)
1343                         RETURN(-ENOMEM);
1344
1345                 /* validate the lsm */
1346                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1347                                    ll_md_blocking_ast);
1348                 if (rc != 0) {
1349                         OBD_FREE_PTR(attr);
1350                         RETURN(rc);
1351                 }
1352
1353                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1354                         md->body->mbo_nlink = attr->cat_nlink;
1355                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1356                         md->body->mbo_size = attr->cat_size;
1357                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1358                         md->body->mbo_atime = attr->cat_atime;
1359                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1360                         md->body->mbo_ctime = attr->cat_ctime;
1361                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1362                         md->body->mbo_mtime = attr->cat_mtime;
1363
1364                 OBD_FREE_PTR(attr);
1365
1366                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1367                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1368                 RETURN(0);
1369         }
1370
1371         /* Compare the old and new stripe information */
1372         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1373                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1374                 int                     idx;
1375
1376                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1377                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1378                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1379                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1380                        inode, lsm, old_lsm,
1381                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1382                        lsm->lsm_md_stripe_count,
1383                        old_lsm->lsm_md_stripe_count,
1384                        lsm->lsm_md_master_mdt_index,
1385                        old_lsm->lsm_md_master_mdt_index,
1386                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1387                        lsm->lsm_md_layout_version,
1388                        old_lsm->lsm_md_layout_version,
1389                        lsm->lsm_md_pool_name,
1390                        old_lsm->lsm_md_pool_name);
1391
1392                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1393                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1394                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1395                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1396                 }
1397
1398                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1399                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1400                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1401                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1402                 }
1403
1404                 RETURN(-EIO);
1405         }
1406
1407         RETURN(0);
1408 }
1409
1410 void ll_clear_inode(struct inode *inode)
1411 {
1412         struct ll_inode_info *lli = ll_i2info(inode);
1413         struct ll_sb_info *sbi = ll_i2sbi(inode);
1414         ENTRY;
1415
1416         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1417                PFID(ll_inode2fid(inode)), inode);
1418
1419         if (S_ISDIR(inode->i_mode)) {
1420                 /* these should have been cleared in ll_file_release */
1421                 LASSERT(lli->lli_opendir_key == NULL);
1422                 LASSERT(lli->lli_sai == NULL);
1423                 LASSERT(lli->lli_opendir_pid == 0);
1424         }
1425
1426         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1427
1428         LASSERT(!lli->lli_open_fd_write_count);
1429         LASSERT(!lli->lli_open_fd_read_count);
1430         LASSERT(!lli->lli_open_fd_exec_count);
1431
1432         if (lli->lli_mds_write_och)
1433                 ll_md_real_close(inode, FMODE_WRITE);
1434         if (lli->lli_mds_exec_och)
1435                 ll_md_real_close(inode, FMODE_EXEC);
1436         if (lli->lli_mds_read_och)
1437                 ll_md_real_close(inode, FMODE_READ);
1438
1439         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1440                 OBD_FREE(lli->lli_symlink_name,
1441                          strlen(lli->lli_symlink_name) + 1);
1442                 lli->lli_symlink_name = NULL;
1443         }
1444
1445         ll_xattr_cache_destroy(inode);
1446
1447 #ifdef CONFIG_FS_POSIX_ACL
1448         if (lli->lli_posix_acl) {
1449                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1450                 posix_acl_release(lli->lli_posix_acl);
1451                 lli->lli_posix_acl = NULL;
1452         }
1453 #endif
1454         lli->lli_inode_magic = LLI_INODE_DEAD;
1455
1456         if (S_ISDIR(inode->i_mode))
1457                 ll_dir_clear_lsm_md(inode);
1458         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1459                 LASSERT(list_empty(&lli->lli_agl_list));
1460
1461         /*
1462          * XXX This has to be done before lsm is freed below, because
1463          * cl_object still uses inode lsm.
1464          */
1465         cl_inode_fini(inode);
1466
1467         EXIT;
1468 }
1469
1470 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1471 {
1472         struct lustre_md md;
1473         struct inode *inode = dentry->d_inode;
1474         struct ll_sb_info *sbi = ll_i2sbi(inode);
1475         struct ptlrpc_request *request = NULL;
1476         int rc, ia_valid;
1477         ENTRY;
1478
1479         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1480                                      LUSTRE_OPC_ANY, NULL);
1481         if (IS_ERR(op_data))
1482                 RETURN(PTR_ERR(op_data));
1483
1484         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1485         if (rc) {
1486                 ptlrpc_req_finished(request);
1487                 if (rc == -ENOENT) {
1488                         clear_nlink(inode);
1489                         /* Unlinked special device node? Or just a race?
1490                          * Pretend we done everything. */
1491                         if (!S_ISREG(inode->i_mode) &&
1492                             !S_ISDIR(inode->i_mode)) {
1493                                 ia_valid = op_data->op_attr.ia_valid;
1494                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1495                                 rc = simple_setattr(dentry, &op_data->op_attr);
1496                                 op_data->op_attr.ia_valid = ia_valid;
1497                         }
1498                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1499                         CERROR("md_setattr fails: rc = %d\n", rc);
1500                 }
1501                 RETURN(rc);
1502         }
1503
1504         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1505                               sbi->ll_md_exp, &md);
1506         if (rc) {
1507                 ptlrpc_req_finished(request);
1508                 RETURN(rc);
1509         }
1510
1511         ia_valid = op_data->op_attr.ia_valid;
1512         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1513          * cache is not cleared yet. */
1514         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1515         if (S_ISREG(inode->i_mode))
1516                 inode_lock(inode);
1517         rc = simple_setattr(dentry, &op_data->op_attr);
1518         if (S_ISREG(inode->i_mode))
1519                 inode_unlock(inode);
1520         op_data->op_attr.ia_valid = ia_valid;
1521
1522         rc = ll_update_inode(inode, &md);
1523         ptlrpc_req_finished(request);
1524
1525         RETURN(rc);
1526 }
1527
1528 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1529  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1530  * keep these values until such a time that objects are allocated for it.
1531  * We do the MDS operations first, as it is checking permissions for us.
1532  * We don't to the MDS RPC if there is nothing that we want to store there,
1533  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1534  * going to do an RPC anyways.
1535  *
1536  * If we are doing a truncate, we will send the mtime and ctime updates
1537  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1538  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1539  * at the same time.
1540  *
1541  * In case of HSMimport, we only set attr on MDS.
1542  */
1543 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1544 {
1545         struct inode *inode = dentry->d_inode;
1546         struct ll_inode_info *lli = ll_i2info(inode);
1547         struct md_op_data *op_data = NULL;
1548         int rc = 0;
1549         ENTRY;
1550
1551         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1552                "valid %x, hsm_import %d\n",
1553                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1554                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1555                hsm_import);
1556
1557         if (attr->ia_valid & ATTR_SIZE) {
1558                 /* Check new size against VFS/VM file size limit and rlimit */
1559                 rc = inode_newsize_ok(inode, attr->ia_size);
1560                 if (rc)
1561                         RETURN(rc);
1562
1563                 /* The maximum Lustre file size is variable, based on the
1564                  * OST maximum object size and number of stripes.  This
1565                  * needs another check in addition to the VFS check above. */
1566                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1567                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1568                                PFID(&lli->lli_fid), attr->ia_size,
1569                                ll_file_maxbytes(inode));
1570                         RETURN(-EFBIG);
1571                 }
1572
1573                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1574         }
1575
1576         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1577         if (attr->ia_valid & TIMES_SET_FLAGS) {
1578                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1579                     !cfs_capable(CFS_CAP_FOWNER))
1580                         RETURN(-EPERM);
1581         }
1582
1583         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1584         if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1585             (attr->ia_valid & ATTR_CTIME)) {
1586                 attr->ia_ctime = CURRENT_TIME;
1587                 attr->ia_valid |= ATTR_CTIME_SET;
1588         }
1589         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1590             (attr->ia_valid & ATTR_ATIME)) {
1591                 attr->ia_atime = CURRENT_TIME;
1592                 attr->ia_valid |= ATTR_ATIME_SET;
1593         }
1594         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1595             (attr->ia_valid & ATTR_MTIME)) {
1596                 attr->ia_mtime = CURRENT_TIME;
1597                 attr->ia_valid |= ATTR_MTIME_SET;
1598         }
1599
1600         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1601                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1602                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1603                        (s64)ktime_get_real_seconds());
1604
1605         if (S_ISREG(inode->i_mode)) {
1606                 if (attr->ia_valid & ATTR_SIZE)
1607                         inode_dio_write_done(inode);
1608                 inode_unlock(inode);
1609         }
1610
1611         /* We always do an MDS RPC, even if we're only changing the size;
1612          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1613
1614         OBD_ALLOC_PTR(op_data);
1615         if (op_data == NULL)
1616                 GOTO(out, rc = -ENOMEM);
1617
1618         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1619                 /* If we are changing file size, file content is
1620                  * modified, flag it. */
1621                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1622                 op_data->op_bias |= MDS_DATA_MODIFIED;
1623                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1624         }
1625
1626         op_data->op_attr = *attr;
1627
1628         rc = ll_md_setattr(dentry, op_data);
1629         if (rc)
1630                 GOTO(out, rc);
1631
1632         if (!S_ISREG(inode->i_mode) || hsm_import)
1633                 GOTO(out, rc = 0);
1634
1635         if (attr->ia_valid & (ATTR_SIZE |
1636                               ATTR_ATIME | ATTR_ATIME_SET |
1637                               ATTR_MTIME | ATTR_MTIME_SET |
1638                               ATTR_CTIME | ATTR_CTIME_SET)) {
1639                 /* For truncate and utimes sending attributes to OSTs, setting
1640                  * mtime/atime to the past will be performed under PW [0:EOF]
1641                  * extent lock (new_size:EOF for truncate).  It may seem
1642                  * excessive to send mtime/atime updates to OSTs when not
1643                  * setting times to past, but it is necessary due to possible
1644                  * time de-synchronization between MDT inode and OST objects */
1645                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1646         }
1647
1648         /* If the file was restored, it needs to set dirty flag.
1649          *
1650          * We've already sent MDS_DATA_MODIFIED flag in
1651          * ll_md_setattr() for truncate. However, the MDT refuses to
1652          * set the HS_DIRTY flag on released files, so we have to set
1653          * it again if the file has been restored. Please check how
1654          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1655          *
1656          * Please notice that if the file is not released, the previous
1657          * MDS_DATA_MODIFIED has taken effect and usually
1658          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1659          * This way we can save an RPC for common open + trunc
1660          * operation. */
1661         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1662                 struct hsm_state_set hss = {
1663                         .hss_valid = HSS_SETMASK,
1664                         .hss_setmask = HS_DIRTY,
1665                 };
1666                 int rc2;
1667
1668                 rc2 = ll_hsm_state_set(inode, &hss);
1669                 /* truncate and write can happen at the same time, so that
1670                  * the file can be set modified even though the file is not
1671                  * restored from released state, and ll_hsm_state_set() is
1672                  * not applicable for the file, and rc2 < 0 is normal in this
1673                  * case. */
1674                 if (rc2 < 0)
1675                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1676                                PFID(ll_inode2fid(inode)), rc2);
1677         }
1678
1679         EXIT;
1680 out:
1681         if (op_data != NULL)
1682                 ll_finish_md_op_data(op_data);
1683
1684         if (S_ISREG(inode->i_mode)) {
1685                 inode_lock(inode);
1686                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1687                         inode_dio_wait(inode);
1688         }
1689
1690         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1691                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1692
1693         return rc;
1694 }
1695
1696 int ll_setattr(struct dentry *de, struct iattr *attr)
1697 {
1698         int mode = de->d_inode->i_mode;
1699
1700         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1701                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1702                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1703
1704         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1705                                (ATTR_SIZE|ATTR_MODE)) &&
1706             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1707              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1708               !(attr->ia_mode & S_ISGID))))
1709                 attr->ia_valid |= ATTR_FORCE;
1710
1711         if ((attr->ia_valid & ATTR_MODE) &&
1712             (mode & S_ISUID) &&
1713             !(attr->ia_mode & S_ISUID) &&
1714             !(attr->ia_valid & ATTR_KILL_SUID))
1715                 attr->ia_valid |= ATTR_KILL_SUID;
1716
1717         if ((attr->ia_valid & ATTR_MODE) &&
1718             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1719             !(attr->ia_mode & S_ISGID) &&
1720             !(attr->ia_valid & ATTR_KILL_SGID))
1721                 attr->ia_valid |= ATTR_KILL_SGID;
1722
1723         return ll_setattr_raw(de, attr, false);
1724 }
1725
1726 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1727                        __u64 max_age, __u32 flags)
1728 {
1729         struct ll_sb_info *sbi = ll_s2sbi(sb);
1730         struct obd_statfs obd_osfs;
1731         int rc;
1732         ENTRY;
1733
1734         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1735         if (rc) {
1736                 CERROR("md_statfs fails: rc = %d\n", rc);
1737                 RETURN(rc);
1738         }
1739
1740         osfs->os_type = sb->s_magic;
1741
1742         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1743                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1744
1745         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1746                 flags |= OBD_STATFS_NODELAY;
1747
1748         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1749         if (rc) {
1750                 CERROR("obd_statfs fails: rc = %d\n", rc);
1751                 RETURN(rc);
1752         }
1753
1754         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1755                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1756                obd_osfs.os_files);
1757
1758         osfs->os_bsize = obd_osfs.os_bsize;
1759         osfs->os_blocks = obd_osfs.os_blocks;
1760         osfs->os_bfree = obd_osfs.os_bfree;
1761         osfs->os_bavail = obd_osfs.os_bavail;
1762
1763         /* If we don't have as many objects free on the OST as inodes
1764          * on the MDS, we reduce the total number of inodes to
1765          * compensate, so that the "inodes in use" number is correct.
1766          */
1767         if (obd_osfs.os_ffree < osfs->os_ffree) {
1768                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1769                         obd_osfs.os_ffree;
1770                 osfs->os_ffree = obd_osfs.os_ffree;
1771         }
1772
1773         RETURN(rc);
1774 }
1775 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1776 {
1777         struct super_block *sb = de->d_sb;
1778         struct obd_statfs osfs;
1779         __u64 fsid = huge_encode_dev(sb->s_dev);
1780         int rc;
1781
1782         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1783         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1784
1785         /* Some amount of caching on the client is allowed */
1786         rc = ll_statfs_internal(sb, &osfs,
1787                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1788                                 0);
1789         if (rc)
1790                 return rc;
1791
1792         statfs_unpack(sfs, &osfs);
1793
1794         /* We need to downshift for all 32-bit kernels, because we can't
1795          * tell if the kernel is being called via sys_statfs64() or not.
1796          * Stop before overflowing f_bsize - in which case it is better
1797          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1798         if (sizeof(long) < 8) {
1799                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1800                         sfs->f_bsize <<= 1;
1801
1802                         osfs.os_blocks >>= 1;
1803                         osfs.os_bfree >>= 1;
1804                         osfs.os_bavail >>= 1;
1805                 }
1806         }
1807
1808         sfs->f_blocks = osfs.os_blocks;
1809         sfs->f_bfree = osfs.os_bfree;
1810         sfs->f_bavail = osfs.os_bavail;
1811         sfs->f_fsid.val[0] = (__u32)fsid;
1812         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1813         return 0;
1814 }
1815
1816 void ll_inode_size_lock(struct inode *inode)
1817 {
1818         struct ll_inode_info *lli;
1819
1820         LASSERT(!S_ISDIR(inode->i_mode));
1821
1822         lli = ll_i2info(inode);
1823         mutex_lock(&lli->lli_size_mutex);
1824 }
1825
1826 void ll_inode_size_unlock(struct inode *inode)
1827 {
1828         struct ll_inode_info *lli;
1829
1830         lli = ll_i2info(inode);
1831         mutex_unlock(&lli->lli_size_mutex);
1832 }
1833
1834 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1835 {
1836         struct ll_inode_info *lli = ll_i2info(inode);
1837         struct mdt_body *body = md->body;
1838         struct ll_sb_info *sbi = ll_i2sbi(inode);
1839
1840         if (body->mbo_valid & OBD_MD_FLEASIZE)
1841                 cl_file_inode_init(inode, md);
1842
1843         if (S_ISDIR(inode->i_mode)) {
1844                 int     rc;
1845
1846                 rc = ll_update_lsm_md(inode, md);
1847                 if (rc != 0)
1848                         return rc;
1849         }
1850
1851 #ifdef CONFIG_FS_POSIX_ACL
1852         if (body->mbo_valid & OBD_MD_FLACL) {
1853                 spin_lock(&lli->lli_lock);
1854                 if (lli->lli_posix_acl)
1855                         posix_acl_release(lli->lli_posix_acl);
1856                 lli->lli_posix_acl = md->posix_acl;
1857                 spin_unlock(&lli->lli_lock);
1858         }
1859 #endif
1860         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1861                                         sbi->ll_flags & LL_SBI_32BIT_API);
1862         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1863
1864         if (body->mbo_valid & OBD_MD_FLATIME) {
1865                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1866                         LTIME_S(inode->i_atime) = body->mbo_atime;
1867                 lli->lli_atime = body->mbo_atime;
1868         }
1869
1870         if (body->mbo_valid & OBD_MD_FLMTIME) {
1871                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1872                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1873                                "to %llu\n", inode->i_ino,
1874                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1875                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1876                 }
1877                 lli->lli_mtime = body->mbo_mtime;
1878         }
1879
1880         if (body->mbo_valid & OBD_MD_FLCTIME) {
1881                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1882                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1883                 lli->lli_ctime = body->mbo_ctime;
1884         }
1885
1886         if (body->mbo_valid & OBD_MD_FLMODE)
1887                 inode->i_mode = (inode->i_mode & S_IFMT) |
1888                                 (body->mbo_mode & ~S_IFMT);
1889
1890         if (body->mbo_valid & OBD_MD_FLTYPE)
1891                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1892                                 (body->mbo_mode & S_IFMT);
1893
1894         LASSERT(inode->i_mode != 0);
1895         if (S_ISREG(inode->i_mode))
1896                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1897                                        LL_MAX_BLKSIZE_BITS);
1898         else
1899                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1900
1901         if (body->mbo_valid & OBD_MD_FLUID)
1902                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1903         if (body->mbo_valid & OBD_MD_FLGID)
1904                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1905         if (body->mbo_valid & OBD_MD_FLFLAGS)
1906                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1907         if (body->mbo_valid & OBD_MD_FLNLINK)
1908                 set_nlink(inode, body->mbo_nlink);
1909         if (body->mbo_valid & OBD_MD_FLRDEV)
1910                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1911
1912         if (body->mbo_valid & OBD_MD_FLID) {
1913                 /* FID shouldn't be changed! */
1914                 if (fid_is_sane(&lli->lli_fid)) {
1915                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1916                                  "Trying to change FID "DFID
1917                                  " to the "DFID", inode "DFID"(%p)\n",
1918                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1919                                  PFID(ll_inode2fid(inode)), inode);
1920                 } else {
1921                         lli->lli_fid = body->mbo_fid1;
1922                 }
1923         }
1924
1925         LASSERT(fid_seq(&lli->lli_fid) != 0);
1926
1927         if (body->mbo_valid & OBD_MD_FLSIZE) {
1928                 i_size_write(inode, body->mbo_size);
1929
1930                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1931                        PFID(ll_inode2fid(inode)),
1932                        (unsigned long long)body->mbo_size);
1933
1934                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1935                         inode->i_blocks = body->mbo_blocks;
1936         }
1937
1938         if (body->mbo_valid & OBD_MD_TSTATE) {
1939                 /* Set LLIF_FILE_RESTORING if restore ongoing and
1940                  * clear it when done to ensure to start again
1941                  * glimpsing updated attrs
1942                  */
1943                 if (body->mbo_t_state & MS_RESTORE)
1944                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1945                 else
1946                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1947         }
1948
1949         return 0;
1950 }
1951
1952 int ll_read_inode2(struct inode *inode, void *opaque)
1953 {
1954         struct lustre_md *md = opaque;
1955         struct ll_inode_info *lli = ll_i2info(inode);
1956         int     rc;
1957         ENTRY;
1958
1959         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1960                PFID(&lli->lli_fid), inode);
1961
1962         /* Core attributes from the MDS first.  This is a new inode, and
1963          * the VFS doesn't zero times in the core inode so we have to do
1964          * it ourselves.  They will be overwritten by either MDS or OST
1965          * attributes - we just need to make sure they aren't newer. */
1966         LTIME_S(inode->i_mtime) = 0;
1967         LTIME_S(inode->i_atime) = 0;
1968         LTIME_S(inode->i_ctime) = 0;
1969         inode->i_rdev = 0;
1970         rc = ll_update_inode(inode, md);
1971         if (rc != 0)
1972                 RETURN(rc);
1973
1974         /* OIDEBUG(inode); */
1975
1976 #ifdef HAVE_BACKING_DEV_INFO
1977         /* initializing backing dev info. */
1978         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1979 #endif
1980         if (S_ISREG(inode->i_mode)) {
1981                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1982                 inode->i_op = &ll_file_inode_operations;
1983                 inode->i_fop = sbi->ll_fop;
1984                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1985                 EXIT;
1986         } else if (S_ISDIR(inode->i_mode)) {
1987                 inode->i_op = &ll_dir_inode_operations;
1988                 inode->i_fop = &ll_dir_operations;
1989                 EXIT;
1990         } else if (S_ISLNK(inode->i_mode)) {
1991                 inode->i_op = &ll_fast_symlink_inode_operations;
1992                 EXIT;
1993         } else {
1994                 inode->i_op = &ll_special_inode_operations;
1995
1996                 init_special_inode(inode, inode->i_mode,
1997                                    inode->i_rdev);
1998
1999                 EXIT;
2000         }
2001
2002         return 0;
2003 }
2004
2005 void ll_delete_inode(struct inode *inode)
2006 {
2007         struct ll_inode_info *lli = ll_i2info(inode);
2008         ENTRY;
2009
2010         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2011                 /* It is last chance to write out dirty pages,
2012                  * otherwise we may lose data while umount */
2013                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2014
2015         truncate_inode_pages_final(&inode->i_data);
2016
2017         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2018                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2019                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2020
2021 #ifdef HAVE_SBOPS_EVICT_INODE
2022         ll_clear_inode(inode);
2023 #endif
2024         clear_inode(inode);
2025
2026         EXIT;
2027 }
2028
2029 int ll_iocontrol(struct inode *inode, struct file *file,
2030                  unsigned int cmd, unsigned long arg)
2031 {
2032         struct ll_sb_info *sbi = ll_i2sbi(inode);
2033         struct ptlrpc_request *req = NULL;
2034         int rc, flags = 0;
2035         ENTRY;
2036
2037         switch(cmd) {
2038         case FSFILT_IOC_GETFLAGS: {
2039                 struct mdt_body *body;
2040                 struct md_op_data *op_data;
2041
2042                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2043                                              0, 0, LUSTRE_OPC_ANY,
2044                                              NULL);
2045                 if (IS_ERR(op_data))
2046                         RETURN(PTR_ERR(op_data));
2047
2048                 op_data->op_valid = OBD_MD_FLFLAGS;
2049                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2050                 ll_finish_md_op_data(op_data);
2051                 if (rc) {
2052                         CERROR("%s: failure inode "DFID": rc = %d\n",
2053                                sbi->ll_md_exp->exp_obd->obd_name,
2054                                PFID(ll_inode2fid(inode)), rc);
2055                         RETURN(-abs(rc));
2056                 }
2057
2058                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2059
2060                 flags = body->mbo_flags;
2061
2062                 ptlrpc_req_finished(req);
2063
2064                 RETURN(put_user(flags, (int __user *)arg));
2065         }
2066         case FSFILT_IOC_SETFLAGS: {
2067                 struct iattr *attr;
2068                 struct md_op_data *op_data;
2069                 struct cl_object *obj;
2070
2071                 if (get_user(flags, (int __user *)arg))
2072                         RETURN(-EFAULT);
2073
2074                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2075                                              LUSTRE_OPC_ANY, NULL);
2076                 if (IS_ERR(op_data))
2077                         RETURN(PTR_ERR(op_data));
2078
2079                 op_data->op_attr_flags = flags;
2080                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2081                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2082                 ll_finish_md_op_data(op_data);
2083                 ptlrpc_req_finished(req);
2084                 if (rc)
2085                         RETURN(rc);
2086
2087                 inode->i_flags = ll_ext_to_inode_flags(flags);
2088
2089                 obj = ll_i2info(inode)->lli_clob;
2090                 if (obj == NULL)
2091                         RETURN(0);
2092
2093                 OBD_ALLOC_PTR(attr);
2094                 if (attr == NULL)
2095                         RETURN(-ENOMEM);
2096
2097                 attr->ia_valid = ATTR_ATTR_FLAG;
2098                 rc = cl_setattr_ost(obj, attr, flags);
2099
2100                 OBD_FREE_PTR(attr);
2101                 RETURN(rc);
2102         }
2103         default:
2104                 RETURN(-ENOSYS);
2105         }
2106
2107         RETURN(0);
2108 }
2109
2110 int ll_flush_ctx(struct inode *inode)
2111 {
2112         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2113
2114         CDEBUG(D_SEC, "flush context for user %d\n",
2115                from_kuid(&init_user_ns, current_uid()));
2116
2117         obd_set_info_async(NULL, sbi->ll_md_exp,
2118                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2119                            0, NULL, NULL);
2120         obd_set_info_async(NULL, sbi->ll_dt_exp,
2121                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2122                            0, NULL, NULL);
2123         return 0;
2124 }
2125
2126 /* umount -f client means force down, don't save state */
2127 void ll_umount_begin(struct super_block *sb)
2128 {
2129         struct ll_sb_info *sbi = ll_s2sbi(sb);
2130         struct obd_device *obd;
2131         struct obd_ioctl_data *ioc_data;
2132         struct l_wait_info lwi;
2133         wait_queue_head_t waitq;
2134         ENTRY;
2135
2136         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2137                sb->s_count, atomic_read(&sb->s_active));
2138
2139         obd = class_exp2obd(sbi->ll_md_exp);
2140         if (obd == NULL) {
2141                 CERROR("Invalid MDC connection handle %#llx\n",
2142                        sbi->ll_md_exp->exp_handle.h_cookie);
2143                 EXIT;
2144                 return;
2145         }
2146         obd->obd_force = 1;
2147
2148         obd = class_exp2obd(sbi->ll_dt_exp);
2149         if (obd == NULL) {
2150                 CERROR("Invalid LOV connection handle %#llx\n",
2151                        sbi->ll_dt_exp->exp_handle.h_cookie);
2152                 EXIT;
2153                 return;
2154         }
2155         obd->obd_force = 1;
2156
2157         OBD_ALLOC_PTR(ioc_data);
2158         if (ioc_data) {
2159                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2160                               sizeof *ioc_data, ioc_data, NULL);
2161
2162                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2163                               sizeof *ioc_data, ioc_data, NULL);
2164
2165                 OBD_FREE_PTR(ioc_data);
2166         }
2167
2168         /* Really, we'd like to wait until there are no requests outstanding,
2169          * and then continue.  For now, we just periodically checking for vfs
2170          * to decrement mnt_cnt and hope to finish it within 10sec.
2171          */
2172         init_waitqueue_head(&waitq);
2173         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2174                                    cfs_time_seconds(1), NULL, NULL);
2175         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2176
2177         EXIT;
2178 }
2179
2180 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2181 {
2182         struct ll_sb_info *sbi = ll_s2sbi(sb);
2183         char *profilenm = get_profile_name(sb);
2184         int err;
2185         __u32 read_only;
2186
2187         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2188                 read_only = *flags & MS_RDONLY;
2189                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2190                                          sizeof(KEY_READ_ONLY),
2191                                          KEY_READ_ONLY, sizeof(read_only),
2192                                          &read_only, NULL);
2193                 if (err) {
2194                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2195                                       profilenm, read_only ?
2196                                       "read-only" : "read-write", err);
2197                         return err;
2198                 }
2199
2200                 if (read_only)
2201                         sb->s_flags |= MS_RDONLY;
2202                 else
2203                         sb->s_flags &= ~MS_RDONLY;
2204
2205                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2206                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2207                                       read_only ?  "read-only" : "read-write");
2208         }
2209         return 0;
2210 }
2211
2212 /**
2213  * Cleanup the open handle that is cached on MDT-side.
2214  *
2215  * For open case, the client side open handling thread may hit error
2216  * after the MDT grant the open. Under such case, the client should
2217  * send close RPC to the MDT as cleanup; otherwise, the open handle
2218  * on the MDT will be leaked there until the client umount or evicted.
2219  *
2220  * In further, if someone unlinked the file, because the open handle
2221  * holds the reference on such file/object, then it will block the
2222  * subsequent threads that want to locate such object via FID.
2223  *
2224  * \param[in] sb        super block for this file-system
2225  * \param[in] open_req  pointer to the original open request
2226  */
2227 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2228 {
2229         struct mdt_body                 *body;
2230         struct md_op_data               *op_data;
2231         struct ptlrpc_request           *close_req = NULL;
2232         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2233         ENTRY;
2234
2235         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2236         OBD_ALLOC_PTR(op_data);
2237         if (op_data == NULL) {
2238                 CWARN("%s: cannot allocate op_data to release open handle for "
2239                       DFID"\n",
2240                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2241
2242                 RETURN_EXIT;
2243         }
2244
2245         op_data->op_fid1 = body->mbo_fid1;
2246         op_data->op_handle = body->mbo_handle;
2247         op_data->op_mod_time = ktime_get_real_seconds();
2248         md_close(exp, op_data, NULL, &close_req);
2249         ptlrpc_req_finished(close_req);
2250         ll_finish_md_op_data(op_data);
2251
2252         EXIT;
2253 }
2254
2255 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2256                   struct super_block *sb, struct lookup_intent *it)
2257 {
2258         struct ll_sb_info *sbi = NULL;
2259         struct lustre_md md = { NULL };
2260         int rc;
2261         ENTRY;
2262
2263         LASSERT(*inode || sb);
2264         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2265         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2266                               sbi->ll_md_exp, &md);
2267         if (rc != 0)
2268                 GOTO(cleanup, rc);
2269
2270         if (*inode) {
2271                 rc = ll_update_inode(*inode, &md);
2272                 if (rc != 0)
2273                         GOTO(out, rc);
2274         } else {
2275                 LASSERT(sb != NULL);
2276
2277                 /*
2278                  * At this point server returns to client's same fid as client
2279                  * generated for creating. So using ->fid1 is okay here.
2280                  */
2281                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2282                         CERROR("%s: Fid is insane "DFID"\n",
2283                                 ll_get_fsname(sb, NULL, 0),
2284                                 PFID(&md.body->mbo_fid1));
2285                         GOTO(out, rc = -EINVAL);
2286                 }
2287
2288                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2289                                              sbi->ll_flags & LL_SBI_32BIT_API),
2290                                  &md);
2291                 if (IS_ERR(*inode)) {
2292 #ifdef CONFIG_FS_POSIX_ACL
2293                         if (md.posix_acl) {
2294                                 posix_acl_release(md.posix_acl);
2295                                 md.posix_acl = NULL;
2296                         }
2297 #endif
2298                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2299                         *inode = NULL;
2300                         CERROR("new_inode -fatal: rc %d\n", rc);
2301                         GOTO(out, rc);
2302                 }
2303         }
2304
2305         /* Handling piggyback layout lock.
2306          * Layout lock can be piggybacked by getattr and open request.
2307          * The lsm can be applied to inode only if it comes with a layout lock
2308          * otherwise correct layout may be overwritten, for example:
2309          * 1. proc1: mdt returns a lsm but not granting layout
2310          * 2. layout was changed by another client
2311          * 3. proc2: refresh layout and layout lock granted
2312          * 4. proc1: to apply a stale layout */
2313         if (it != NULL && it->it_lock_mode != 0) {
2314                 struct lustre_handle lockh;
2315                 struct ldlm_lock *lock;
2316
2317                 lockh.cookie = it->it_lock_handle;
2318                 lock = ldlm_handle2lock(&lockh);
2319                 LASSERT(lock != NULL);
2320                 if (ldlm_has_layout(lock)) {
2321                         struct cl_object_conf conf;
2322
2323                         memset(&conf, 0, sizeof(conf));
2324                         conf.coc_opc = OBJECT_CONF_SET;
2325                         conf.coc_inode = *inode;
2326                         conf.coc_lock = lock;
2327                         conf.u.coc_layout = md.layout;
2328                         (void)ll_layout_conf(*inode, &conf);
2329                 }
2330                 LDLM_LOCK_PUT(lock);
2331         }
2332
2333         GOTO(out, rc = 0);
2334
2335 out:
2336         md_free_lustre_md(sbi->ll_md_exp, &md);
2337
2338 cleanup:
2339         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2340                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2341
2342         return rc;
2343 }
2344
2345 int ll_obd_statfs(struct inode *inode, void __user *arg)
2346 {
2347         struct ll_sb_info *sbi = NULL;
2348         struct obd_export *exp;
2349         char *buf = NULL;
2350         struct obd_ioctl_data *data = NULL;
2351         __u32 type;
2352         int len = 0, rc;
2353
2354         if (!inode || !(sbi = ll_i2sbi(inode)))
2355                 GOTO(out_statfs, rc = -EINVAL);
2356
2357         rc = obd_ioctl_getdata(&buf, &len, arg);
2358         if (rc)
2359                 GOTO(out_statfs, rc);
2360
2361         data = (void*)buf;
2362         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2363             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2364                 GOTO(out_statfs, rc = -EINVAL);
2365
2366         if (data->ioc_inllen1 != sizeof(__u32) ||
2367             data->ioc_inllen2 != sizeof(__u32) ||
2368             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2369             data->ioc_plen2 != sizeof(struct obd_uuid))
2370                 GOTO(out_statfs, rc = -EINVAL);
2371
2372         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2373         if (type & LL_STATFS_LMV)
2374                 exp = sbi->ll_md_exp;
2375         else if (type & LL_STATFS_LOV)
2376                 exp = sbi->ll_dt_exp;
2377         else
2378                 GOTO(out_statfs, rc = -ENODEV);
2379
2380         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2381         if (rc)
2382                 GOTO(out_statfs, rc);
2383 out_statfs:
2384         if (buf)
2385                 obd_ioctl_freedata(buf, len);
2386         return rc;
2387 }
2388
2389 int ll_process_config(struct lustre_cfg *lcfg)
2390 {
2391         struct super_block *sb;
2392         unsigned long x;
2393         int rc = 0;
2394         char *ptr;
2395
2396         /* The instance name contains the sb: lustre-client-aacfe000 */
2397         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2398         if (!ptr || !*(++ptr))
2399                 return -EINVAL;
2400         if (sscanf(ptr, "%lx", &x) != 1)
2401                 return -EINVAL;
2402         sb = (struct super_block *)x;
2403         /* This better be a real Lustre superblock! */
2404         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2405
2406         /* Note we have not called client_common_fill_super yet, so
2407            proc fns must be able to handle that! */
2408         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2409                                       lcfg, sb);
2410         if (rc > 0)
2411                 rc = 0;
2412         return rc;
2413 }
2414
2415 /* this function prepares md_op_data hint for passing it down to MD stack. */
2416 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2417                                       struct inode *i1, struct inode *i2,
2418                                       const char *name, size_t namelen,
2419                                       __u32 mode, __u32 opc, void *data)
2420 {
2421         LASSERT(i1 != NULL);
2422
2423         if (name == NULL) {
2424                 /* Do not reuse namelen for something else. */
2425                 if (namelen != 0)
2426                         return ERR_PTR(-EINVAL);
2427         } else {
2428                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2429                         return ERR_PTR(-ENAMETOOLONG);
2430
2431                 if (!lu_name_is_valid_2(name, namelen))
2432                         return ERR_PTR(-EINVAL);
2433         }
2434
2435         if (op_data == NULL)
2436                 OBD_ALLOC_PTR(op_data);
2437
2438         if (op_data == NULL)
2439                 return ERR_PTR(-ENOMEM);
2440
2441         ll_i2gids(op_data->op_suppgids, i1, i2);
2442         op_data->op_fid1 = *ll_inode2fid(i1);
2443         op_data->op_default_stripe_offset = -1;
2444         if (S_ISDIR(i1->i_mode)) {
2445                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2446                 if (opc == LUSTRE_OPC_MKDIR)
2447                         op_data->op_default_stripe_offset =
2448                                    ll_i2info(i1)->lli_def_stripe_offset;
2449         }
2450
2451         if (i2) {
2452                 op_data->op_fid2 = *ll_inode2fid(i2);
2453                 if (S_ISDIR(i2->i_mode))
2454                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2455         } else {
2456                 fid_zero(&op_data->op_fid2);
2457         }
2458
2459         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2460                 op_data->op_cli_flags |= CLI_HASH64;
2461
2462         if (ll_need_32bit_api(ll_i2sbi(i1)))
2463                 op_data->op_cli_flags |= CLI_API32;
2464
2465         op_data->op_name = name;
2466         op_data->op_namelen = namelen;
2467         op_data->op_mode = mode;
2468         op_data->op_mod_time = cfs_time_current_sec();
2469         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2470         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2471         op_data->op_cap = cfs_curproc_cap_pack();
2472         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2473              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2474                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2475         } else {
2476                 op_data->op_mds = 0;
2477         }
2478         op_data->op_data = data;
2479
2480         return op_data;
2481 }
2482
2483 void ll_finish_md_op_data(struct md_op_data *op_data)
2484 {
2485         security_release_secctx(op_data->op_file_secctx,
2486                                 op_data->op_file_secctx_size);
2487         OBD_FREE_PTR(op_data);
2488 }
2489
2490 #ifdef HAVE_SUPEROPS_USE_DENTRY
2491 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2492 #else
2493 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2494 #endif
2495 {
2496         struct ll_sb_info *sbi;
2497
2498 #ifdef HAVE_SUPEROPS_USE_DENTRY
2499         LASSERT((seq != NULL) && (dentry != NULL));
2500         sbi = ll_s2sbi(dentry->d_sb);
2501 #else
2502         LASSERT((seq != NULL) && (vfs != NULL));
2503         sbi = ll_s2sbi(vfs->mnt_sb);
2504 #endif
2505
2506         if (sbi->ll_flags & LL_SBI_NOLCK)
2507                 seq_puts(seq, ",nolock");
2508
2509         if (sbi->ll_flags & LL_SBI_FLOCK)
2510                 seq_puts(seq, ",flock");
2511
2512         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2513                 seq_puts(seq, ",localflock");
2514
2515         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2516                 seq_puts(seq, ",user_xattr");
2517
2518         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2519                 seq_puts(seq, ",lazystatfs");
2520
2521         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2522                 seq_puts(seq, ",user_fid2path");
2523
2524         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2525                 seq_puts(seq, ",always_ping");
2526
2527         RETURN(0);
2528 }
2529
2530 /**
2531  * Get obd name by cmd, and copy out to user space
2532  */
2533 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2534 {
2535         struct ll_sb_info *sbi = ll_i2sbi(inode);
2536         struct obd_device *obd;
2537         ENTRY;
2538
2539         if (cmd == OBD_IOC_GETDTNAME)
2540                 obd = class_exp2obd(sbi->ll_dt_exp);
2541         else if (cmd == OBD_IOC_GETMDNAME)
2542                 obd = class_exp2obd(sbi->ll_md_exp);
2543         else
2544                 RETURN(-EINVAL);
2545
2546         if (!obd)
2547                 RETURN(-ENOENT);
2548
2549         if (copy_to_user((void __user *)arg, obd->obd_name,
2550                          strlen(obd->obd_name) + 1))
2551                 RETURN(-EFAULT);
2552
2553         RETURN(0);
2554 }
2555
2556 /**
2557  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2558  * fsname will be returned in this buffer; otherwise, a static buffer will be
2559  * used to store the fsname and returned to caller.
2560  */
2561 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2562 {
2563         static char fsname_static[MTI_NAME_MAXLEN];
2564         struct lustre_sb_info *lsi = s2lsi(sb);
2565         char *ptr;
2566         int len;
2567
2568         if (buf == NULL) {
2569                 /* this means the caller wants to use static buffer
2570                  * and it doesn't care about race. Usually this is
2571                  * in error reporting path */
2572                 buf = fsname_static;
2573                 buflen = sizeof(fsname_static);
2574         }
2575
2576         len = strlen(lsi->lsi_lmd->lmd_profile);
2577         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2578         if (ptr && (strcmp(ptr, "-client") == 0))
2579                 len -= 7;
2580
2581         if (unlikely(len >= buflen))
2582                 len = buflen - 1;
2583         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2584         buf[len] = '\0';
2585
2586         return buf;
2587 }
2588
2589 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2590 {
2591         char *path = NULL;
2592
2593         struct path p;
2594
2595         p.dentry = dentry;
2596         p.mnt = current->fs->root.mnt;
2597         path_get(&p);
2598         path = d_path(&p, buf, bufsize);
2599         path_put(&p);
2600         return path;
2601 }
2602
2603 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2604 {
2605         char *buf, *path = NULL;
2606         struct dentry *dentry = NULL;
2607         struct inode *inode = page->mapping->host;
2608
2609         /* this can be called inside spin lock so use GFP_ATOMIC. */
2610         buf = (char *)__get_free_page(GFP_ATOMIC);
2611         if (buf != NULL) {
2612                 dentry = d_find_alias(page->mapping->host);
2613                 if (dentry != NULL)
2614                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2615         }
2616
2617         CDEBUG(D_WARNING,
2618                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2619                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2620                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2621                PFID(ll_inode2fid(inode)),
2622                (path && !IS_ERR(path)) ? path : "", ioret);
2623
2624         if (dentry != NULL)
2625                 dput(dentry);
2626
2627         if (buf != NULL)
2628                 free_page((unsigned long)buf);
2629 }
2630
2631 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2632                         struct lov_user_md **kbuf)
2633 {
2634         struct lov_user_md      lum;
2635         ssize_t                 lum_size;
2636         ENTRY;
2637
2638         if (copy_from_user(&lum, md, sizeof(lum)))
2639                 RETURN(-EFAULT);
2640
2641         lum_size = ll_lov_user_md_size(&lum);
2642         if (lum_size < 0)
2643                 RETURN(lum_size);
2644
2645         OBD_ALLOC(*kbuf, lum_size);
2646         if (*kbuf == NULL)
2647                 RETURN(-ENOMEM);
2648
2649         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2650                 OBD_FREE(*kbuf, lum_size);
2651                 RETURN(-EFAULT);
2652         }
2653
2654         RETURN(lum_size);
2655 }
2656
2657 /*
2658  * Compute llite root squash state after a change of root squash
2659  * configuration setting or add/remove of a lnet nid
2660  */
2661 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2662 {
2663         struct root_squash_info *squash = &sbi->ll_squash;
2664         int i;
2665         bool matched;
2666         struct lnet_process_id id;
2667
2668         /* Update norootsquash flag */
2669         down_write(&squash->rsi_sem);
2670         if (list_empty(&squash->rsi_nosquash_nids))
2671                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2672         else {
2673                 /* Do not apply root squash as soon as one of our NIDs is
2674                  * in the nosquash_nids list */
2675                 matched = false;
2676                 i = 0;
2677                 while (LNetGetId(i++, &id) != -ENOENT) {
2678                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2679                                 continue;
2680                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2681                                 matched = true;
2682                                 break;
2683                         }
2684                 }
2685                 if (matched)
2686                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2687                 else
2688                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2689         }
2690         up_write(&squash->rsi_sem);
2691 }
2692
2693 /**
2694  * Parse linkea content to extract information about a given hardlink
2695  *
2696  * \param[in]   ldata      - Initialized linkea data
2697  * \param[in]   linkno     - Link identifier
2698  * \param[out]  parent_fid - The entry's parent FID
2699  * \param[out]  ln         - Entry name destination buffer
2700  *
2701  * \retval 0 on success
2702  * \retval Appropriate negative error code on failure
2703  */
2704 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2705                             struct lu_fid *parent_fid, struct lu_name *ln)
2706 {
2707         unsigned int    idx;
2708         int             rc;
2709         ENTRY;
2710
2711         rc = linkea_init_with_rec(ldata);
2712         if (rc < 0)
2713                 RETURN(rc);
2714
2715         if (linkno >= ldata->ld_leh->leh_reccount)
2716                 /* beyond last link */
2717                 RETURN(-ENODATA);
2718
2719         linkea_first_entry(ldata);
2720         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2721                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2722                                     parent_fid);
2723                 if (idx == linkno)
2724                         break;
2725
2726                 linkea_next_entry(ldata);
2727         }
2728
2729         if (idx < linkno)
2730                 RETURN(-ENODATA);
2731
2732         RETURN(0);
2733 }
2734
2735 /**
2736  * Get parent FID and name of an identified link. Operation is performed for
2737  * a given link number, letting the caller iterate over linkno to list one or
2738  * all links of an entry.
2739  *
2740  * \param[in]     file - File descriptor against which to perform the operation
2741  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2742  *                       on and the available size. It is eventually filled with
2743  *                       the requested information or left untouched on error
2744  *
2745  * \retval - 0 on success
2746  * \retval - Appropriate negative error code on failure
2747  */
2748 int ll_getparent(struct file *file, struct getparent __user *arg)
2749 {
2750         struct dentry           *dentry = file_dentry(file);
2751         struct inode            *inode = file_inode(file);
2752         struct linkea_data      *ldata;
2753         struct lu_buf            buf = LU_BUF_NULL;
2754         struct lu_name           ln;
2755         struct lu_fid            parent_fid;
2756         __u32                    linkno;
2757         __u32                    name_size;
2758         int                      rc;
2759
2760         ENTRY;
2761
2762         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2763             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2764                 RETURN(-EPERM);
2765
2766         if (get_user(name_size, &arg->gp_name_size))
2767                 RETURN(-EFAULT);
2768
2769         if (get_user(linkno, &arg->gp_linkno))
2770                 RETURN(-EFAULT);
2771
2772         if (name_size > PATH_MAX)
2773                 RETURN(-EINVAL);
2774
2775         OBD_ALLOC(ldata, sizeof(*ldata));
2776         if (ldata == NULL)
2777                 RETURN(-ENOMEM);
2778
2779         rc = linkea_data_new(ldata, &buf);
2780         if (rc < 0)
2781                 GOTO(ldata_free, rc);
2782
2783         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2784         if (rc < 0)
2785                 GOTO(lb_free, rc);
2786
2787         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2788         if (rc < 0)
2789                 GOTO(lb_free, rc);
2790
2791         if (ln.ln_namelen >= name_size)
2792                 GOTO(lb_free, rc = -EOVERFLOW);
2793
2794         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2795                 GOTO(lb_free, rc = -EFAULT);
2796
2797         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2798                 GOTO(lb_free, rc = -EFAULT);
2799
2800         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2801                 GOTO(lb_free, rc = -EFAULT);
2802
2803 lb_free:
2804         lu_buf_free(&buf);
2805 ldata_free:
2806         OBD_FREE(ldata, sizeof(*ldata));
2807
2808         RETURN(rc);
2809 }