lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/version.h>
  47 #include <linux/mm.h>
  48
  49 #include <lustre_ioctl.h>
  50 #include <lustre_ha.h>
  51 #include <lustre_dlm.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_disk.h>
  54 #include <lustre_param.h>
  55 #include <lustre_log.h>
  56 #include <cl_object.h>
  57 #include <obd_cksum.h>
  58 #include "llite_internal.h"
  59
  60 struct kmem_cache *ll_file_data_slab;
  61
  62 static struct list_head ll_super_blocks = LIST_HEAD_INIT(ll_super_blocks);
  63 static DEFINE_SPINLOCK(ll_sb_lock);
  64
  65 #ifndef log2
  66 #define log2(n) ffz(~(n))
  67 #endif
  68
  69 static struct ll_sb_info *ll_init_sbi(void)
  70 {
  71         struct ll_sb_info *sbi = NULL;
  72         unsigned long pages;
  73         unsigned long lru_page_max;
  74         struct sysinfo si;
  75         class_uuid_t uuid;
  76         int i;
  77         ENTRY;
  78
  79         OBD_ALLOC_PTR(sbi);
  80         if (sbi == NULL)
  81                 RETURN(NULL);
  82
  83         spin_lock_init(&sbi->ll_lock);
  84         mutex_init(&sbi->ll_lco.lco_lock);
  85         spin_lock_init(&sbi->ll_pp_extent_lock);
  86         spin_lock_init(&sbi->ll_process_lock);
  87         sbi->ll_rw_stats_on = 0;
  88
  89         si_meminfo(&si);
  90         pages = si.totalram - si.totalhigh;
  91         lru_page_max = pages / 2;
  92
  93         /* initialize ll_cache data */
  94         sbi->ll_cache = cl_cache_init(lru_page_max);
  95         if (sbi->ll_cache == NULL) {
  96                 OBD_FREE(sbi, sizeof(*sbi));
  97                 RETURN(NULL);
  98         }
  99
 100         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 101                                            SBI_DEFAULT_READAHEAD_MAX);
 102         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 103         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 104                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 105         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 106         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 107
 108         ll_generate_random_uuid(uuid);
 109         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 110         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 111
 112         spin_lock(&ll_sb_lock);
 113         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 114         spin_unlock(&ll_sb_lock);
 115
 116         sbi->ll_flags |= LL_SBI_VERBOSE;
 117 #ifdef ENABLE_CHECKSUM
 118         sbi->ll_flags |= LL_SBI_CHECKSUM;
 119 #endif
 120
 121 #ifdef HAVE_LRU_RESIZE_SUPPORT
 122         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 123 #endif
 124
 125         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 126                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 127                                pp_r_hist.oh_lock);
 128                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 129                                pp_w_hist.oh_lock);
 130         }
 131
 132         /* metadata statahead is enabled by default */
 133         sbi->ll_sa_max = LL_SA_RPC_DEF;
 134         atomic_set(&sbi->ll_sa_total, 0);
 135         atomic_set(&sbi->ll_sa_wrong, 0);
 136         atomic_set(&sbi->ll_sa_running, 0);
 137         atomic_set(&sbi->ll_agl_total, 0);
 138         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 139
 140         /* root squash */
 141         sbi->ll_squash.rsi_uid = 0;
 142         sbi->ll_squash.rsi_gid = 0;
 143         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 144         init_rwsem(&sbi->ll_squash.rsi_sem);
 145
 146         RETURN(sbi);
 147 }
 148
 149 static void ll_free_sbi(struct super_block *sb)
 150 {
 151         struct ll_sb_info *sbi = ll_s2sbi(sb);
 152         ENTRY;
 153
 154         if (sbi != NULL) {
 155                 spin_lock(&ll_sb_lock);
 156                 list_del(&sbi->ll_list);
 157                 spin_unlock(&ll_sb_lock);
 158                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 159                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 160                 if (sbi->ll_cache != NULL) {
 161                         cl_cache_decref(sbi->ll_cache);
 162                         sbi->ll_cache = NULL;
 163                 }
 164                 OBD_FREE(sbi, sizeof(*sbi));
 165         }
 166         EXIT;
 167 }
 168
 169 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 170                                     struct vfsmount *mnt)
 171 {
 172         struct inode *root = NULL;
 173         struct ll_sb_info *sbi = ll_s2sbi(sb);
 174         struct obd_device *obd;
 175         struct obd_capa *oc = NULL;
 176         struct obd_statfs *osfs = NULL;
 177         struct ptlrpc_request *request = NULL;
 178         struct obd_connect_data *data = NULL;
 179         struct obd_uuid *uuid;
 180         struct md_op_data *op_data;
 181         struct lustre_md lmd;
 182         u64 valid;
 183         int size, err, checksum;
 184         ENTRY;
 185
 186         obd = class_name2obd(md);
 187         if (!obd) {
 188                 CERROR("MD %s: not setup or attached\n", md);
 189                 RETURN(-EINVAL);
 190         }
 191
 192         OBD_ALLOC_PTR(data);
 193         if (data == NULL)
 194                 RETURN(-ENOMEM);
 195
 196         OBD_ALLOC_PTR(osfs);
 197         if (osfs == NULL) {
 198                 OBD_FREE_PTR(data);
 199                 RETURN(-ENOMEM);
 200         }
 201
 202         /* indicate the features supported by this client */
 203         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 204                                   OBD_CONNECT_ATTRFID  |
 205                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 206                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 207                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 208                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 209                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 210                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 211                                   OBD_CONNECT_EINPROGRESS |
 212                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 213                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 214                                   OBD_CONNECT_MAX_EASIZE |
 215                                   OBD_CONNECT_FLOCK_DEAD |
 216                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 217                                   OBD_CONNECT_OPEN_BY_FID |
 218                                   OBD_CONNECT_DIR_STRIPE;
 219
 220 #ifdef HAVE_LRU_RESIZE_SUPPORT
 221         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 222                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 223 #endif
 224 #ifdef CONFIG_FS_POSIX_ACL
 225         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 226 #endif
 227
 228         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 229                 /* flag mdc connection as lightweight, only used for test
 230                  * purpose, use with care */
 231                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 232
 233         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 234         data->ocd_version = LUSTRE_VERSION_CODE;
 235
 236         if (sb->s_flags & MS_RDONLY)
 237                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 238         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 239                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 240
 241 #ifdef HAVE_MS_FLOCK_LOCK
 242         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 243         sb->s_flags |= MS_FLOCK_LOCK;
 244 #endif
 245 #ifdef MS_HAS_NEW_AOPS
 246         sb->s_flags |= MS_HAS_NEW_AOPS;
 247 #endif
 248
 249         if (sbi->ll_flags & LL_SBI_FLOCK)
 250                 sbi->ll_fop = &ll_file_operations_flock;
 251         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 252                 sbi->ll_fop = &ll_file_operations;
 253         else
 254                 sbi->ll_fop = &ll_file_operations_noflock;
 255
 256         /* real client */
 257         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 258         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 259                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 260
 261         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 262
 263         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 264         if (err == -EBUSY) {
 265                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 266                                    "recovery, of which this client is not a "
 267                                    "part. Please wait for recovery to complete,"
 268                                    " abort, or time out.\n", md);
 269                 GOTO(out, err);
 270         } else if (err) {
 271                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 272                 GOTO(out, err);
 273         }
 274
 275         sbi->ll_md_exp->exp_connect_data = *data;
 276
 277         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 278                            LUSTRE_SEQ_METADATA);
 279         if (err) {
 280                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 281                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 282                 GOTO(out_md, err);
 283         }
 284
 285         /* For mount, we only need fs info from MDT0, and also in DNE, it
 286          * can make sure the client can be mounted as long as MDT0 is
 287          * avaible */
 288         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 289                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 290                         OBD_STATFS_FOR_MDT0);
 291         if (err)
 292                 GOTO(out_md_fid, err);
 293
 294         /* This needs to be after statfs to ensure connect has finished.
 295          * Note that "data" does NOT contain the valid connect reply.
 296          * If connecting to a 1.8 server there will be no LMV device, so
 297          * we can access the MDC export directly and exp_connect_flags will
 298          * be non-zero, but if accessing an upgraded 2.1 server it will
 299          * have the correct flags filled in.
 300          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 301         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 302         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 303             valid != CLIENT_CONNECT_MDT_REQD) {
 304                 char *buf;
 305
 306                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 307                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 308                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 309                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 310                                    "feature(s) needed for correct operation "
 311                                    "of this client (%s). Please upgrade "
 312                                    "server or downgrade client.\n",
 313                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 314                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 315                 GOTO(out_md_fid, err = -EPROTO);
 316         }
 317
 318         size = sizeof(*data);
 319         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 320                            KEY_CONN_DATA,  &size, data, NULL);
 321         if (err) {
 322                 CERROR("%s: Get connect data failed: rc = %d\n",
 323                        sbi->ll_md_exp->exp_obd->obd_name, err);
 324                 GOTO(out_md_fid, err);
 325         }
 326
 327         LASSERT(osfs->os_bsize);
 328         sb->s_blocksize = osfs->os_bsize;
 329         sb->s_blocksize_bits = log2(osfs->os_bsize);
 330         sb->s_magic = LL_SUPER_MAGIC;
 331         sb->s_maxbytes = MAX_LFS_FILESIZE;
 332         sbi->ll_namelen = osfs->os_namelen;
 333         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 334
 335         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 336             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 337                 LCONSOLE_INFO("Disabling user_xattr feature because "
 338                               "it is not supported on the server\n");
 339                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 340         }
 341
 342         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 343 #ifdef MS_POSIXACL
 344                 sb->s_flags |= MS_POSIXACL;
 345 #endif
 346                 sbi->ll_flags |= LL_SBI_ACL;
 347         } else {
 348                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 349 #ifdef MS_POSIXACL
 350                 sb->s_flags &= ~MS_POSIXACL;
 351 #endif
 352                 sbi->ll_flags &= ~LL_SBI_ACL;
 353         }
 354
 355         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 356                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 357                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 358                         LCONSOLE_INFO("client is set as remote by default.\n");
 359                 }
 360         } else {
 361                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 362                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 363                         LCONSOLE_INFO("client claims to be remote, but server "
 364                                       "rejected, forced to be local.\n");
 365                 }
 366         }
 367
 368         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 369                 LCONSOLE_INFO("client enabled MDS capability!\n");
 370                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 371         }
 372
 373         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 374                 LCONSOLE_INFO("client enabled OSS capability!\n");
 375                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 376         }
 377
 378         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 379                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 380
 381         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 382                 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
 383         else
 384                 sbi->ll_md_brw_pages = 1;
 385
 386         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 387                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 388
 389         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 390                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 391                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 392                                       "unknown maximum xattr size.\n", dt);
 393                 } else {
 394                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 395                         sbi->ll_xattr_cache_enabled = 1;
 396                 }
 397         }
 398
 399         obd = class_name2obd(dt);
 400         if (!obd) {
 401                 CERROR("DT %s: not setup or attached\n", dt);
 402                 GOTO(out_md_fid, err = -ENODEV);
 403         }
 404
 405         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 406                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 407                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 408                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 409                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 410                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 411                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 412                                   OBD_CONNECT_MAXBYTES |
 413                                   OBD_CONNECT_EINPROGRESS |
 414                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 415                                   OBD_CONNECT_LAYOUTLOCK |
 416                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK;
 417
 418         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 419                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 420                  * disabled by default, because it can still be enabled on the
 421                  * fly via /proc. As a consequence, we still need to come to an
 422                  * agreement on the supported algorithms at connect time */
 423                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 424
 425                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 426                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 427                 else
 428                         data->ocd_cksum_types = cksum_types_supported_client();
 429         }
 430
 431 #ifdef HAVE_LRU_RESIZE_SUPPORT
 432         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 433 #endif
 434         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 435                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 436
 437         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 438                "ocd_grant: %d\n", data->ocd_connect_flags,
 439                data->ocd_version, data->ocd_grant);
 440
 441         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 442         obd->obd_upcall.onu_upcall = cl_ocd_update;
 443
 444         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 445
 446         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 447                           NULL);
 448         if (err == -EBUSY) {
 449                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 450                                    "recovery, of which this client is not a "
 451                                    "part.  Please wait for recovery to "
 452                                    "complete, abort, or time out.\n", dt);
 453                 GOTO(out_md, err);
 454         } else if (err) {
 455                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 456                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 457                 GOTO(out_md, err);
 458         }
 459
 460         sbi->ll_dt_exp->exp_connect_data = *data;
 461
 462         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 463                            LUSTRE_SEQ_METADATA);
 464         if (err) {
 465                 CERROR("%s: Can't init data layer FID infrastructure, "
 466                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 467                 GOTO(out_dt, err);
 468         }
 469
 470         mutex_lock(&sbi->ll_lco.lco_lock);
 471         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 472         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 473         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 474         mutex_unlock(&sbi->ll_lco.lco_lock);
 475
 476         fid_zero(&sbi->ll_root_fid);
 477         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 478         if (err) {
 479                 CERROR("cannot mds_connect: rc = %d\n", err);
 480                 GOTO(out_lock_cn_cb, err);
 481         }
 482         if (!fid_is_sane(&sbi->ll_root_fid)) {
 483                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 484                        sbi->ll_md_exp->exp_obd->obd_name,
 485                        PFID(&sbi->ll_root_fid));
 486                 GOTO(out_lock_cn_cb, err = -EINVAL);
 487         }
 488         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 489
 490         sb->s_op = &lustre_super_operations;
 491 #if THREAD_SIZE >= 8192 /*b=17630*/
 492         sb->s_export_op = &lustre_export_operations;
 493 #endif
 494
 495         /* make root inode
 496          * XXX: move this to after cbd setup? */
 497         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA |
 498                 OBD_MD_FLMODEASIZE;
 499         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 500                 valid |= OBD_MD_FLRMTPERM;
 501         else if (sbi->ll_flags & LL_SBI_ACL)
 502                 valid |= OBD_MD_FLACL;
 503
 504         OBD_ALLOC_PTR(op_data);
 505         if (op_data == NULL)
 506                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 507
 508         op_data->op_fid1 = sbi->ll_root_fid;
 509         op_data->op_mode = 0;
 510         op_data->op_capa1 = oc;
 511         op_data->op_valid = valid;
 512
 513         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 514         if (oc)
 515                 capa_put(oc);
 516         OBD_FREE_PTR(op_data);
 517         if (err) {
 518                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 519                        sbi->ll_md_exp->exp_obd->obd_name, err);
 520                 GOTO(out_lock_cn_cb, err);
 521         }
 522
 523         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 524                                sbi->ll_md_exp, &lmd);
 525         if (err) {
 526                 CERROR("failed to understand root inode md: rc = %d\n", err);
 527                 ptlrpc_req_finished(request);
 528                 GOTO(out_lock_cn_cb, err);
 529         }
 530
 531         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 532         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 533                                             sbi->ll_flags & LL_SBI_32BIT_API),
 534                        &lmd);
 535         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 536         ptlrpc_req_finished(request);
 537
 538         if (IS_ERR(root)) {
 539                 if (lmd.lsm)
 540                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 541 #ifdef CONFIG_FS_POSIX_ACL
 542                 if (lmd.posix_acl) {
 543                         posix_acl_release(lmd.posix_acl);
 544                         lmd.posix_acl = NULL;
 545                 }
 546 #endif
 547                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 548                 root = NULL;
 549                 CERROR("lustre_lite: bad iget4 for root\n");
 550                 GOTO(out_root, err);
 551         }
 552
 553 #ifdef CONFIG_FS_POSIX_ACL
 554         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 555                 rct_init(&sbi->ll_rct);
 556                 et_init(&sbi->ll_et);
 557         }
 558 #endif
 559
 560         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 561         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 562                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 563                                  NULL);
 564         cl_sb_init(sb);
 565
 566         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 567                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 568                                  sbi->ll_cache, NULL);
 569
 570         sb->s_root = d_make_root(root);
 571         if (sb->s_root == NULL) {
 572                 CERROR("%s: can't make root dentry\n",
 573                         ll_get_fsname(sb, NULL, 0));
 574                 GOTO(out_root, err = -ENOMEM);
 575         }
 576 #ifdef HAVE_DCACHE_LOCK
 577         sb->s_root->d_op = &ll_d_ops;
 578 #endif
 579
 580         sbi->ll_sdev_orig = sb->s_dev;
 581
 582         /* We set sb->s_dev equal on all lustre clients in order to support
 583          * NFS export clustering.  NFSD requires that the FSID be the same
 584          * on all clients. */
 585         /* s_dev is also used in lt_compare() to compare two fs, but that is
 586          * only a node-local comparison. */
 587         uuid = obd_get_uuid(sbi->ll_md_exp);
 588         if (uuid != NULL)
 589                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 590
 591         if (data != NULL)
 592                 OBD_FREE_PTR(data);
 593         if (osfs != NULL)
 594                 OBD_FREE_PTR(osfs);
 595         if (proc_lustre_fs_root != NULL) {
 596                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 597                                                   dt, md);
 598                 if (err < 0) {
 599                         CERROR("%s: could not register mount in lprocfs: "
 600                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 601                         err = 0;
 602                 }
 603         }
 604
 605         RETURN(err);
 606 out_root:
 607         if (root)
 608                 iput(root);
 609 out_lock_cn_cb:
 610         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 611 out_dt:
 612         obd_disconnect(sbi->ll_dt_exp);
 613         sbi->ll_dt_exp = NULL;
 614 out_md_fid:
 615         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 616 out_md:
 617         obd_disconnect(sbi->ll_md_exp);
 618         sbi->ll_md_exp = NULL;
 619 out:
 620         if (data != NULL)
 621                 OBD_FREE_PTR(data);
 622         if (osfs != NULL)
 623                 OBD_FREE_PTR(osfs);
 624         return err;
 625 }
 626
 627 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 628 {
 629         int size, rc;
 630
 631         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 632         size = sizeof(int);
 633         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 634                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 635         if (rc)
 636                 CERROR("Get max mdsize error rc %d\n", rc);
 637
 638         RETURN(rc);
 639 }
 640
 641 /**
 642  * Get the value of the default_easize parameter.
 643  *
 644  * \see client_obd::cl_default_mds_easize
 645  *
 646  * \param[in] sbi       superblock info for this filesystem
 647  * \param[out] lmmsize  pointer to storage location for value
 648  *
 649  * \retval 0            on success
 650  * \retval negative     negated errno on failure
 651  */
 652 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 653 {
 654         int size, rc;
 655
 656         size = sizeof(int);
 657         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 658                          KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 659         if (rc)
 660                 CERROR("Get default mdsize error rc %d\n", rc);
 661
 662         RETURN(rc);
 663 }
 664
 665 /**
 666  * Set the default_easize parameter to the given value.
 667  *
 668  * \see client_obd::cl_default_mds_easize
 669  *
 670  * \param[in] sbi       superblock info for this filesystem
 671  * \param[in] lmmsize   the size to set
 672  *
 673  * \retval 0            on success
 674  * \retval negative     negated errno on failure
 675  */
 676 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 677 {
 678         int rc;
 679
 680         if (lmmsize < sizeof(struct lov_mds_md) ||
 681             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 682                 return -EINVAL;
 683
 684         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 685                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 686                                 sizeof(int), &lmmsize, NULL);
 687
 688         RETURN(rc);
 689 }
 690
 691 int ll_get_max_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 692 {
 693         int size, rc;
 694
 695         size = sizeof(int);
 696         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_COOKIESIZE),
 697                           KEY_MAX_COOKIESIZE, &size, lmmsize, NULL);
 698         if (rc)
 699                 CERROR("Get max cookiesize error rc %d\n", rc);
 700
 701         RETURN(rc);
 702 }
 703
 704 int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 705 {
 706         int size, rc;
 707
 708         size = sizeof(int);
 709         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_COOKIESIZE),
 710                           KEY_DEFAULT_COOKIESIZE, &size, lmmsize, NULL);
 711         if (rc)
 712                 CERROR("Get default cookiesize error rc %d\n", rc);
 713
 714         RETURN(rc);
 715 }
 716
 717 static void ll_dump_inode(struct inode *inode)
 718 {
 719         struct ll_d_hlist_node *tmp;
 720         int dentry_count = 0;
 721
 722         LASSERT(inode != NULL);
 723
 724         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 725                 dentry_count++;
 726
 727         CERROR("%s: inode %p dump: dev=%s fid="DFID
 728                " mode=%o count=%u, %d dentries\n",
 729                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 730                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 731                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 732 }
 733
 734 void lustre_dump_dentry(struct dentry *dentry, int recur)
 735 {
 736         struct list_head *tmp;
 737         int subdirs = 0;
 738
 739         LASSERT(dentry != NULL);
 740
 741         list_for_each(tmp, &dentry->d_subdirs)
 742                 subdirs++;
 743
 744         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 745                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 746                dentry->d_name.len, dentry->d_name.name,
 747                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 748                dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
 749                dentry->d_flags, dentry->d_fsdata, subdirs);
 750         if (dentry->d_inode != NULL)
 751                 ll_dump_inode(dentry->d_inode);
 752
 753         if (recur == 0)
 754                 return;
 755
 756         list_for_each(tmp, &dentry->d_subdirs) {
 757                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 758                 lustre_dump_dentry(d, recur - 1);
 759         }
 760 }
 761
 762 static void client_common_put_super(struct super_block *sb)
 763 {
 764         struct ll_sb_info *sbi = ll_s2sbi(sb);
 765         ENTRY;
 766
 767 #ifdef CONFIG_FS_POSIX_ACL
 768         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 769                 et_fini(&sbi->ll_et);
 770                 rct_fini(&sbi->ll_rct);
 771         }
 772 #endif
 773
 774         cl_sb_fini(sb);
 775
 776         list_del(&sbi->ll_conn_chain);
 777
 778         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 779         obd_disconnect(sbi->ll_dt_exp);
 780         sbi->ll_dt_exp = NULL;
 781
 782         lprocfs_unregister_mountpoint(sbi);
 783
 784         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 785         obd_disconnect(sbi->ll_md_exp);
 786         sbi->ll_md_exp = NULL;
 787
 788         EXIT;
 789 }
 790
 791 void ll_kill_super(struct super_block *sb)
 792 {
 793         struct ll_sb_info *sbi;
 794         ENTRY;
 795
 796         /* not init sb ?*/
 797         if (!(sb->s_flags & MS_ACTIVE))
 798                 return;
 799
 800         sbi = ll_s2sbi(sb);
 801         /* we need restore s_dev from changed for clustred NFS before put_super
 802          * because new kernels have cached s_dev and change sb->s_dev in
 803          * put_super not affected real removing devices */
 804         if (sbi) {
 805                 sb->s_dev = sbi->ll_sdev_orig;
 806                 sbi->ll_umounting = 1;
 807
 808                 /* wait running statahead threads to quit */
 809                 while (atomic_read(&sbi->ll_sa_running) > 0)
 810                         schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
 811                                 msecs_to_jiffies(MSEC_PER_SEC >> 3));
 812         }
 813
 814         EXIT;
 815 }
 816
 817 static inline int ll_set_opt(const char *opt, char *data, int fl)
 818 {
 819         if (strncmp(opt, data, strlen(opt)) != 0)
 820                 return(0);
 821         else
 822                 return(fl);
 823 }
 824
 825 /* non-client-specific mount options are parsed in lmd_parse */
 826 static int ll_options(char *options, int *flags)
 827 {
 828         int tmp;
 829         char *s1 = options, *s2;
 830         ENTRY;
 831
 832         if (!options)
 833                 RETURN(0);
 834
 835         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 836
 837         while (*s1) {
 838                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 839                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 840                 if (tmp) {
 841                         *flags |= tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 850                 if (tmp) {
 851                         *flags |= tmp;
 852                         goto next;
 853                 }
 854                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 855                 if (tmp) {
 856                         *flags &= ~tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 860                 if (tmp) {
 861                         *flags |= tmp;
 862                         goto next;
 863                 }
 864                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 865                 if (tmp) {
 866                         *flags &= ~tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 870                 if (tmp) {
 871                         *flags |= tmp;
 872                         goto next;
 873                 }
 874                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 875                 if (tmp) {
 876                         *flags |= tmp;
 877                         goto next;
 878                 }
 879                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 880                 if (tmp) {
 881                         *flags &= ~tmp;
 882                         goto next;
 883                 }
 884
 885                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 886                 if (tmp) {
 887                         *flags |= tmp;
 888                         goto next;
 889                 }
 890                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 891                 if (tmp) {
 892                         *flags &= ~tmp;
 893                         goto next;
 894                 }
 895                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 896                 if (tmp) {
 897                         *flags |= tmp;
 898                         goto next;
 899                 }
 900                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 901                 if (tmp) {
 902                         *flags &= ~tmp;
 903                         goto next;
 904                 }
 905                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 906                 if (tmp) {
 907                         *flags |= tmp;
 908                         goto next;
 909                 }
 910                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 911                 if (tmp) {
 912                         *flags &= ~tmp;
 913                         goto next;
 914                 }
 915                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 916                 if (tmp) {
 917                         *flags |= tmp;
 918                         goto next;
 919                 }
 920                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 921                 if (tmp) {
 922                         *flags |= tmp;
 923                         goto next;
 924                 }
 925                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 926                 if (tmp) {
 927                         *flags &= ~tmp;
 928                         goto next;
 929                 }
 930                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 931                                    s1);
 932                 RETURN(-EINVAL);
 933
 934 next:
 935                 /* Find next opt */
 936                 s2 = strchr(s1, ',');
 937                 if (s2 == NULL)
 938                         break;
 939                 s1 = s2 + 1;
 940         }
 941         RETURN(0);
 942 }
 943
 944 void ll_lli_init(struct ll_inode_info *lli)
 945 {
 946         lli->lli_inode_magic = LLI_INODE_MAGIC;
 947         lli->lli_flags = 0;
 948         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 949         spin_lock_init(&lli->lli_lock);
 950         lli->lli_posix_acl = NULL;
 951         lli->lli_remote_perms = NULL;
 952         mutex_init(&lli->lli_rmtperm_mutex);
 953         /* Do not set lli_fid, it has been initialized already. */
 954         fid_zero(&lli->lli_pfid);
 955         INIT_LIST_HEAD(&lli->lli_oss_capas);
 956         atomic_set(&lli->lli_open_count, 0);
 957         lli->lli_mds_capa = NULL;
 958         lli->lli_rmtperm_time = 0;
 959         lli->lli_mds_read_och = NULL;
 960         lli->lli_mds_write_och = NULL;
 961         lli->lli_mds_exec_och = NULL;
 962         lli->lli_open_fd_read_count = 0;
 963         lli->lli_open_fd_write_count = 0;
 964         lli->lli_open_fd_exec_count = 0;
 965         mutex_init(&lli->lli_och_mutex);
 966         spin_lock_init(&lli->lli_agl_lock);
 967         lli->lli_has_smd = false;
 968         spin_lock_init(&lli->lli_layout_lock);
 969         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 970         lli->lli_clob = NULL;
 971
 972         init_rwsem(&lli->lli_xattrs_list_rwsem);
 973         mutex_init(&lli->lli_xattrs_enq_lock);
 974
 975         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 976         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 977                 mutex_init(&lli->lli_readdir_mutex);
 978                 lli->lli_opendir_key = NULL;
 979                 lli->lli_sai = NULL;
 980                 spin_lock_init(&lli->lli_sa_lock);
 981                 lli->lli_opendir_pid = 0;
 982                 lli->lli_sa_enabled = 0;
 983                 lli->lli_def_stripe_offset = -1;
 984         } else {
 985                 mutex_init(&lli->lli_size_mutex);
 986                 lli->lli_symlink_name = NULL;
 987                 init_rwsem(&lli->lli_trunc_sem);
 988                 range_lock_tree_init(&lli->lli_write_tree);
 989                 init_rwsem(&lli->lli_glimpse_sem);
 990                 lli->lli_glimpse_time = 0;
 991                 INIT_LIST_HEAD(&lli->lli_agl_list);
 992                 lli->lli_agl_index = 0;
 993                 lli->lli_async_rc = 0;
 994         }
 995         mutex_init(&lli->lli_layout_mutex);
 996 }
 997
 998 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 999 {
1000         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
1001
1002         bdi->name = "lustre";
1003         return bdi_register(bdi, NULL, "lustre-%d",
1004                             atomic_inc_return(&ll_bdi_num));
1005 }
1006
1007 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1008 {
1009         struct lustre_profile *lprof = NULL;
1010         struct lustre_sb_info *lsi = s2lsi(sb);
1011         struct ll_sb_info *sbi;
1012         char  *dt = NULL, *md = NULL;
1013         char  *profilenm = get_profile_name(sb);
1014         struct config_llog_instance *cfg;
1015         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1016         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1017         int    err;
1018         ENTRY;
1019
1020         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1021
1022         OBD_ALLOC_PTR(cfg);
1023         if (cfg == NULL)
1024                 RETURN(-ENOMEM);
1025
1026         try_module_get(THIS_MODULE);
1027
1028         /* client additional sb info */
1029         lsi->lsi_llsbi = sbi = ll_init_sbi();
1030         if (!sbi) {
1031                 module_put(THIS_MODULE);
1032                 OBD_FREE_PTR(cfg);
1033                 RETURN(-ENOMEM);
1034         }
1035
1036         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1037         if (err)
1038                 GOTO(out_free, err);
1039
1040         err = bdi_init(&lsi->lsi_bdi);
1041         if (err)
1042                 GOTO(out_free, err);
1043         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1044         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1045         err = ll_bdi_register(&lsi->lsi_bdi);
1046         if (err)
1047                 GOTO(out_free, err);
1048
1049         sb->s_bdi = &lsi->lsi_bdi;
1050 #ifndef HAVE_DCACHE_LOCK
1051         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1052         sb->s_d_op = &ll_d_ops;
1053 #endif
1054
1055         /* Generate a string unique to this super, in case some joker tries
1056            to mount the same fs at two mount points.
1057            Use the address of the super itself.*/
1058         cfg->cfg_instance = sb;
1059         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1060         cfg->cfg_callback = class_config_llog_handler;
1061         /* set up client obds */
1062         err = lustre_process_log(sb, profilenm, cfg);
1063         if (err < 0)
1064                 GOTO(out_free, err);
1065
1066         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1067         lprof = class_get_profile(profilenm);
1068         if (lprof == NULL) {
1069                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1070                                    " read from the MGS.  Does that filesystem "
1071                                    "exist?\n", profilenm);
1072                 GOTO(out_free, err = -EINVAL);
1073         }
1074         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1075                lprof->lp_md, lprof->lp_dt);
1076
1077         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1078         if (!dt)
1079                 GOTO(out_free, err = -ENOMEM);
1080         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1081
1082         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1083         if (!md)
1084                 GOTO(out_free, err = -ENOMEM);
1085         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1086
1087         /* connections, registrations, sb setup */
1088         err = client_common_fill_super(sb, md, dt, mnt);
1089         if (err < 0)
1090                 GOTO(out_free, err);
1091
1092         sbi->ll_client_common_fill_super_succeeded = 1;
1093
1094 out_free:
1095         if (md)
1096                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1097         if (dt)
1098                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1099         if (err)
1100                 ll_put_super(sb);
1101         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1102                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1103
1104         OBD_FREE_PTR(cfg);
1105         RETURN(err);
1106 } /* ll_fill_super */
1107
1108 void ll_put_super(struct super_block *sb)
1109 {
1110         struct config_llog_instance cfg, params_cfg;
1111         struct obd_device *obd;
1112         struct lustre_sb_info *lsi = s2lsi(sb);
1113         struct ll_sb_info *sbi = ll_s2sbi(sb);
1114         char *profilenm = get_profile_name(sb);
1115         long ccc_count;
1116         int next, force = 1, rc = 0;
1117         ENTRY;
1118
1119         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1120
1121         ll_print_capa_stat(sbi);
1122
1123         cfg.cfg_instance = sb;
1124         lustre_end_log(sb, profilenm, &cfg);
1125
1126         params_cfg.cfg_instance = sb;
1127         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1128
1129         if (sbi->ll_md_exp) {
1130                 obd = class_exp2obd(sbi->ll_md_exp);
1131                 if (obd)
1132                         force = obd->obd_force;
1133         }
1134
1135         /* Wait for unstable pages to be committed to stable storage */
1136         if (force == 0) {
1137                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1138                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1139                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1140                         &lwi);
1141         }
1142
1143         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1144         if (force == 0 && rc != -EINTR)
1145                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1146
1147
1148         /* We need to set force before the lov_disconnect in
1149            lustre_common_put_super, since l_d cleans up osc's as well. */
1150         if (force) {
1151                 next = 0;
1152                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1153                                                      &next)) != NULL) {
1154                         obd->obd_force = force;
1155                 }
1156         }
1157
1158         if (sbi->ll_client_common_fill_super_succeeded) {
1159                 /* Only if client_common_fill_super succeeded */
1160                 client_common_put_super(sb);
1161         }
1162
1163         next = 0;
1164         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1165                 class_manual_cleanup(obd);
1166         }
1167
1168         if (sbi->ll_flags & LL_SBI_VERBOSE)
1169                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1170
1171         if (profilenm)
1172                 class_del_profile(profilenm);
1173
1174         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1175                 bdi_destroy(&lsi->lsi_bdi);
1176                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1177         }
1178
1179         ll_free_sbi(sb);
1180         lsi->lsi_llsbi = NULL;
1181
1182         lustre_common_put_super(sb);
1183
1184         cl_env_cache_purge(~0);
1185
1186         module_put(THIS_MODULE);
1187
1188         EXIT;
1189 } /* client_put_super */
1190
1191 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1192 {
1193         struct inode *inode = NULL;
1194
1195         /* NOTE: we depend on atomic igrab() -bzzz */
1196         lock_res_and_lock(lock);
1197         if (lock->l_resource->lr_lvb_inode) {
1198                 struct ll_inode_info * lli;
1199                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1200                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1201                         inode = igrab(lock->l_resource->lr_lvb_inode);
1202                 } else {
1203                         inode = lock->l_resource->lr_lvb_inode;
1204                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1205                                          D_WARNING, lock, "lr_lvb_inode %p is "
1206                                          "bogus: magic %08x",
1207                                          lock->l_resource->lr_lvb_inode,
1208                                          lli->lli_inode_magic);
1209                         inode = NULL;
1210                 }
1211         }
1212         unlock_res_and_lock(lock);
1213         return inode;
1214 }
1215
1216 static void ll_dir_clear_lsm_md(struct inode *inode)
1217 {
1218         struct ll_inode_info *lli = ll_i2info(inode);
1219
1220         LASSERT(S_ISDIR(inode->i_mode));
1221
1222         if (lli->lli_lsm_md != NULL) {
1223                 lmv_free_memmd(lli->lli_lsm_md);
1224                 lli->lli_lsm_md = NULL;
1225         }
1226 }
1227
1228 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1229                                       const struct lu_fid *fid,
1230                                       struct lustre_md *md)
1231 {
1232         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1233         struct mdt_body         *body = md->body;
1234         struct inode            *inode;
1235         ino_t                   ino;
1236         ENTRY;
1237
1238         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1239         inode = iget_locked(sb, ino);
1240         if (inode == NULL) {
1241                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1242                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1243                 RETURN(ERR_PTR(-ENOENT));
1244         }
1245
1246         if (inode->i_state & I_NEW) {
1247                 struct ll_inode_info *lli = ll_i2info(inode);
1248                 struct lmv_stripe_md *lsm = md->lmv;
1249
1250                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1251                                 (body->mbo_mode & S_IFMT);
1252                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1253                          PFID(fid));
1254
1255                 LTIME_S(inode->i_mtime) = 0;
1256                 LTIME_S(inode->i_atime) = 0;
1257                 LTIME_S(inode->i_ctime) = 0;
1258                 inode->i_rdev = 0;
1259
1260                 /* initializing backing dev info. */
1261                 inode->i_mapping->backing_dev_info =
1262                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1263                 inode->i_op = &ll_dir_inode_operations;
1264                 inode->i_fop = &ll_dir_operations;
1265                 lli->lli_fid = *fid;
1266                 ll_lli_init(lli);
1267
1268                 LASSERT(lsm != NULL);
1269                 /* master object FID */
1270                 lli->lli_pfid = body->mbo_fid1;
1271                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1272                        lli, PFID(fid), PFID(&lli->lli_pfid));
1273                 unlock_new_inode(inode);
1274         }
1275
1276         RETURN(inode);
1277 }
1278
1279 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1280 {
1281         struct lu_fid *fid;
1282         struct lmv_stripe_md *lsm = md->lmv;
1283         int i;
1284
1285         LASSERT(lsm != NULL);
1286         /* XXX sigh, this lsm_root initialization should be in
1287          * LMV layer, but it needs ll_iget right now, so we
1288          * put this here right now. */
1289         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1290                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1291                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1292                 /* Unfortunately ll_iget will call ll_update_inode,
1293                  * where the initialization of slave inode is slightly
1294                  * different, so it reset lsm_md to NULL to avoid
1295                  * initializing lsm for slave inode. */
1296                 /* For migrating inode, master stripe and master object will
1297                  * be same, so we only need assign this inode */
1298                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1299                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1300                 else
1301                         lsm->lsm_md_oinfo[i].lmo_root =
1302                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1303
1304                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1305                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1306
1307                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1308                         return rc;
1309                 }
1310         }
1311
1312         return 0;
1313 }
1314
1315 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1316                                 const struct lmv_stripe_md *lsm_md2)
1317 {
1318         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1319                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1320                lsm_md1->lsm_md_master_mdt_index ==
1321                                         lsm_md2->lsm_md_master_mdt_index &&
1322                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1323                lsm_md1->lsm_md_layout_version ==
1324                                         lsm_md2->lsm_md_layout_version &&
1325                strcmp(lsm_md1->lsm_md_pool_name,
1326                       lsm_md2->lsm_md_pool_name) == 0;
1327 }
1328
1329 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1330 {
1331         struct ll_inode_info *lli = ll_i2info(inode);
1332         struct lmv_stripe_md *lsm = md->lmv;
1333         int     rc;
1334         ENTRY;
1335
1336         LASSERT(S_ISDIR(inode->i_mode));
1337         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1338                PFID(ll_inode2fid(inode)));
1339
1340         /* no striped information from request. */
1341         if (lsm == NULL) {
1342                 if (lli->lli_lsm_md == NULL) {
1343                         RETURN(0);
1344                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1345                                                 LMV_HASH_FLAG_MIGRATION) {
1346                         /* migration is done, the temporay MIGRATE layout has
1347                          * been removed */
1348                         CDEBUG(D_INODE, DFID" finish migration.\n",
1349                                PFID(ll_inode2fid(inode)));
1350                         lmv_free_memmd(lli->lli_lsm_md);
1351                         lli->lli_lsm_md = NULL;
1352                         RETURN(0);
1353                 } else {
1354                         /* The lustre_md from req does not include stripeEA,
1355                          * see ll_md_setattr */
1356                         RETURN(0);
1357                 }
1358         }
1359
1360         /* set the directory layout */
1361         if (lli->lli_lsm_md == NULL) {
1362
1363                 rc = ll_init_lsm_md(inode, md);
1364                 if (rc != 0)
1365                         RETURN(rc);
1366
1367                 lli->lli_lsm_md = lsm;
1368                 /* set lsm_md to NULL, so the following free lustre_md
1369                  * will not free this lsm */
1370                 md->lmv = NULL;
1371                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1372                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1373                 RETURN(0);
1374         }
1375
1376         /* Compare the old and new stripe information */
1377         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1378                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1379                 int                     idx;
1380
1381                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1382                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1383                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1384                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1385                        inode, lsm, old_lsm,
1386                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1387                        lsm->lsm_md_stripe_count,
1388                        old_lsm->lsm_md_stripe_count,
1389                        lsm->lsm_md_master_mdt_index,
1390                        old_lsm->lsm_md_master_mdt_index,
1391                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1392                        lsm->lsm_md_layout_version,
1393                        old_lsm->lsm_md_layout_version,
1394                        lsm->lsm_md_pool_name,
1395                        old_lsm->lsm_md_pool_name);
1396
1397                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1398                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1399                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1400                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1401                 }
1402
1403                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1404                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1405                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1406                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1407                 }
1408
1409                 RETURN(-EIO);
1410         }
1411
1412         RETURN(0);
1413 }
1414
1415 void ll_clear_inode(struct inode *inode)
1416 {
1417         struct ll_inode_info *lli = ll_i2info(inode);
1418         struct ll_sb_info *sbi = ll_i2sbi(inode);
1419         ENTRY;
1420
1421         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1422                PFID(ll_inode2fid(inode)), inode);
1423
1424         if (S_ISDIR(inode->i_mode)) {
1425                 /* these should have been cleared in ll_file_release */
1426                 LASSERT(lli->lli_opendir_key == NULL);
1427                 LASSERT(lli->lli_sai == NULL);
1428                 LASSERT(lli->lli_opendir_pid == 0);
1429         }
1430
1431         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1432
1433         LASSERT(!lli->lli_open_fd_write_count);
1434         LASSERT(!lli->lli_open_fd_read_count);
1435         LASSERT(!lli->lli_open_fd_exec_count);
1436
1437         if (lli->lli_mds_write_och)
1438                 ll_md_real_close(inode, FMODE_WRITE);
1439         if (lli->lli_mds_exec_och)
1440                 ll_md_real_close(inode, FMODE_EXEC);
1441         if (lli->lli_mds_read_och)
1442                 ll_md_real_close(inode, FMODE_READ);
1443
1444         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1445                 OBD_FREE(lli->lli_symlink_name,
1446                          strlen(lli->lli_symlink_name) + 1);
1447                 lli->lli_symlink_name = NULL;
1448         }
1449
1450         ll_xattr_cache_destroy(inode);
1451
1452         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1453                 LASSERT(lli->lli_posix_acl == NULL);
1454                 if (lli->lli_remote_perms) {
1455                         free_rmtperm_hash(lli->lli_remote_perms);
1456                         lli->lli_remote_perms = NULL;
1457                 }
1458         }
1459 #ifdef CONFIG_FS_POSIX_ACL
1460         else if (lli->lli_posix_acl) {
1461                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1462                 LASSERT(lli->lli_remote_perms == NULL);
1463                 posix_acl_release(lli->lli_posix_acl);
1464                 lli->lli_posix_acl = NULL;
1465         }
1466 #endif
1467         lli->lli_inode_magic = LLI_INODE_DEAD;
1468
1469         ll_clear_inode_capas(inode);
1470         if (S_ISDIR(inode->i_mode))
1471                 ll_dir_clear_lsm_md(inode);
1472         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1473                 LASSERT(list_empty(&lli->lli_agl_list));
1474
1475         /*
1476          * XXX This has to be done before lsm is freed below, because
1477          * cl_object still uses inode lsm.
1478          */
1479         cl_inode_fini(inode);
1480         lli->lli_has_smd = false;
1481
1482         EXIT;
1483 }
1484
1485 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1486 {
1487         struct lustre_md md;
1488         struct inode *inode = dentry->d_inode;
1489         struct ll_sb_info *sbi = ll_i2sbi(inode);
1490         struct ptlrpc_request *request = NULL;
1491         int rc, ia_valid;
1492         ENTRY;
1493
1494         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1495                                      LUSTRE_OPC_ANY, NULL);
1496         if (IS_ERR(op_data))
1497                 RETURN(PTR_ERR(op_data));
1498
1499         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1500         if (rc) {
1501                 ptlrpc_req_finished(request);
1502                 if (rc == -ENOENT) {
1503                         clear_nlink(inode);
1504                         /* Unlinked special device node? Or just a race?
1505                          * Pretend we done everything. */
1506                         if (!S_ISREG(inode->i_mode) &&
1507                             !S_ISDIR(inode->i_mode)) {
1508                                 ia_valid = op_data->op_attr.ia_valid;
1509                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1510                                 rc = simple_setattr(dentry, &op_data->op_attr);
1511                                 op_data->op_attr.ia_valid = ia_valid;
1512                         }
1513                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1514                         CERROR("md_setattr fails: rc = %d\n", rc);
1515                 }
1516                 RETURN(rc);
1517         }
1518
1519         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1520                               sbi->ll_md_exp, &md);
1521         if (rc) {
1522                 ptlrpc_req_finished(request);
1523                 RETURN(rc);
1524         }
1525
1526         ia_valid = op_data->op_attr.ia_valid;
1527         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1528          * cache is not cleared yet. */
1529         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1530         rc = simple_setattr(dentry, &op_data->op_attr);
1531         op_data->op_attr.ia_valid = ia_valid;
1532
1533         rc = ll_update_inode(inode, &md);
1534         ptlrpc_req_finished(request);
1535
1536         RETURN(rc);
1537 }
1538
1539 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1540 {
1541         struct obd_capa *capa;
1542         int rc;
1543
1544         if (attr->ia_valid & ATTR_SIZE)
1545                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1546         else
1547                 capa = ll_mdscapa_get(inode);
1548
1549         rc = cl_setattr_ost(ll_i2info(inode)->lli_clob, attr, 0, capa);
1550
1551         if (attr->ia_valid & ATTR_SIZE)
1552                 ll_truncate_free_capa(capa);
1553         else
1554                 capa_put(capa);
1555
1556         return rc;
1557 }
1558
1559 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1560  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1561  * keep these values until such a time that objects are allocated for it.
1562  * We do the MDS operations first, as it is checking permissions for us.
1563  * We don't to the MDS RPC if there is nothing that we want to store there,
1564  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1565  * going to do an RPC anyways.
1566  *
1567  * If we are doing a truncate, we will send the mtime and ctime updates
1568  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1569  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1570  * at the same time.
1571  *
1572  * In case of HSMimport, we only set attr on MDS.
1573  */
1574 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1575 {
1576         struct inode *inode = dentry->d_inode;
1577         struct ll_inode_info *lli = ll_i2info(inode);
1578         struct md_op_data *op_data = NULL;
1579         bool file_is_released = false;
1580         int rc = 0;
1581         ENTRY;
1582
1583         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1584                "valid %x, hsm_import %d\n",
1585                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1586                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1587                hsm_import);
1588
1589         if (attr->ia_valid & ATTR_SIZE) {
1590                 /* Check new size against VFS/VM file size limit and rlimit */
1591                 rc = inode_newsize_ok(inode, attr->ia_size);
1592                 if (rc)
1593                         RETURN(rc);
1594
1595                 /* The maximum Lustre file size is variable, based on the
1596                  * OST maximum object size and number of stripes.  This
1597                  * needs another check in addition to the VFS check above. */
1598                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1599                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1600                                PFID(&lli->lli_fid), attr->ia_size,
1601                                ll_file_maxbytes(inode));
1602                         RETURN(-EFBIG);
1603                 }
1604
1605                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1606         }
1607
1608         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1609         if (attr->ia_valid & TIMES_SET_FLAGS) {
1610                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1611                     !cfs_capable(CFS_CAP_FOWNER))
1612                         RETURN(-EPERM);
1613         }
1614
1615         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1616         if (attr->ia_valid & ATTR_CTIME) {
1617                 attr->ia_ctime = CFS_CURRENT_TIME;
1618                 attr->ia_valid |= ATTR_CTIME_SET;
1619         }
1620         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1621             (attr->ia_valid & ATTR_ATIME)) {
1622                 attr->ia_atime = CFS_CURRENT_TIME;
1623                 attr->ia_valid |= ATTR_ATIME_SET;
1624         }
1625         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1626             (attr->ia_valid & ATTR_MTIME)) {
1627                 attr->ia_mtime = CFS_CURRENT_TIME;
1628                 attr->ia_valid |= ATTR_MTIME_SET;
1629         }
1630
1631         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1632                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1633                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1634                        cfs_time_current_sec());
1635
1636         /* We always do an MDS RPC, even if we're only changing the size;
1637          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1638
1639         OBD_ALLOC_PTR(op_data);
1640         if (op_data == NULL)
1641                 RETURN(-ENOMEM);
1642
1643         if (!S_ISDIR(inode->i_mode)) {
1644                 if (attr->ia_valid & ATTR_SIZE)
1645                         inode_dio_write_done(inode);
1646                 mutex_unlock(&inode->i_mutex);
1647         }
1648
1649         /* truncate on a released file must failed with -ENODATA,
1650          * so size must not be set on MDS for released file
1651          * but other attributes must be set
1652          */
1653         if (S_ISREG(inode->i_mode)) {
1654                 struct lov_stripe_md *lsm;
1655                 __u32 gen;
1656
1657                 ll_layout_refresh(inode, &gen);
1658                 lsm = ccc_inode_lsm_get(inode);
1659                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1660                         file_is_released = true;
1661                 ccc_inode_lsm_put(inode, lsm);
1662
1663                 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1664                         if (file_is_released) {
1665                                 rc = ll_layout_restore(inode, 0, attr->ia_size);
1666                                 if (rc < 0)
1667                                         GOTO(out, rc);
1668
1669                                 file_is_released = false;
1670                                 ll_layout_refresh(inode, &gen);
1671                         }
1672
1673                         /* If we are changing file size, file content is
1674                          * modified, flag it. */
1675                         attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1676                         spin_lock(&lli->lli_lock);
1677                         lli->lli_flags |= LLIF_DATA_MODIFIED;
1678                         spin_unlock(&lli->lli_lock);
1679                         op_data->op_bias |= MDS_DATA_MODIFIED;
1680                 }
1681         }
1682
1683         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1684
1685         rc = ll_md_setattr(dentry, op_data);
1686         if (rc)
1687                 GOTO(out, rc);
1688
1689         /* RPC to MDT is sent, cancel data modification flag */
1690         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1691                 spin_lock(&lli->lli_lock);
1692                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1693                 spin_unlock(&lli->lli_lock);
1694         }
1695
1696         if (!S_ISREG(inode->i_mode) || file_is_released)
1697                 GOTO(out, rc = 0);
1698
1699         if (attr->ia_valid & (ATTR_SIZE |
1700                               ATTR_ATIME | ATTR_ATIME_SET |
1701                               ATTR_MTIME | ATTR_MTIME_SET)) {
1702                 /* For truncate and utimes sending attributes to OSTs, setting
1703                  * mtime/atime to the past will be performed under PW [0:EOF]
1704                  * extent lock (new_size:EOF for truncate).  It may seem
1705                  * excessive to send mtime/atime updates to OSTs when not
1706                  * setting times to past, but it is necessary due to possible
1707                  * time de-synchronization between MDT inode and OST objects */
1708                 if (attr->ia_valid & ATTR_SIZE)
1709                         down_write(&lli->lli_trunc_sem);
1710                 rc = ll_setattr_ost(inode, attr);
1711                 if (attr->ia_valid & ATTR_SIZE)
1712                         up_write(&lli->lli_trunc_sem);
1713         }
1714         EXIT;
1715 out:
1716         if (op_data != NULL)
1717                 ll_finish_md_op_data(op_data);
1718
1719         if (!S_ISDIR(inode->i_mode)) {
1720                 mutex_lock(&inode->i_mutex);
1721                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1722                         inode_dio_wait(inode);
1723         }
1724
1725         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1726                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1727
1728         return rc;
1729 }
1730
1731 int ll_setattr(struct dentry *de, struct iattr *attr)
1732 {
1733         int mode = de->d_inode->i_mode;
1734
1735         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1736                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1737                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1738
1739         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1740                                (ATTR_SIZE|ATTR_MODE)) &&
1741             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1742              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1743               !(attr->ia_mode & S_ISGID))))
1744                 attr->ia_valid |= ATTR_FORCE;
1745
1746         if ((attr->ia_valid & ATTR_MODE) &&
1747             (mode & S_ISUID) &&
1748             !(attr->ia_mode & S_ISUID) &&
1749             !(attr->ia_valid & ATTR_KILL_SUID))
1750                 attr->ia_valid |= ATTR_KILL_SUID;
1751
1752         if ((attr->ia_valid & ATTR_MODE) &&
1753             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1754             !(attr->ia_mode & S_ISGID) &&
1755             !(attr->ia_valid & ATTR_KILL_SGID))
1756                 attr->ia_valid |= ATTR_KILL_SGID;
1757
1758         return ll_setattr_raw(de, attr, false);
1759 }
1760
1761 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1762                        __u64 max_age, __u32 flags)
1763 {
1764         struct ll_sb_info *sbi = ll_s2sbi(sb);
1765         struct obd_statfs obd_osfs;
1766         int rc;
1767         ENTRY;
1768
1769         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1770         if (rc) {
1771                 CERROR("md_statfs fails: rc = %d\n", rc);
1772                 RETURN(rc);
1773         }
1774
1775         osfs->os_type = sb->s_magic;
1776
1777         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1778                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1779
1780         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1781                 flags |= OBD_STATFS_NODELAY;
1782
1783         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1784         if (rc) {
1785                 CERROR("obd_statfs fails: rc = %d\n", rc);
1786                 RETURN(rc);
1787         }
1788
1789         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1790                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1791                obd_osfs.os_files);
1792
1793         osfs->os_bsize = obd_osfs.os_bsize;
1794         osfs->os_blocks = obd_osfs.os_blocks;
1795         osfs->os_bfree = obd_osfs.os_bfree;
1796         osfs->os_bavail = obd_osfs.os_bavail;
1797
1798         /* If we don't have as many objects free on the OST as inodes
1799          * on the MDS, we reduce the total number of inodes to
1800          * compensate, so that the "inodes in use" number is correct.
1801          */
1802         if (obd_osfs.os_ffree < osfs->os_ffree) {
1803                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1804                         obd_osfs.os_ffree;
1805                 osfs->os_ffree = obd_osfs.os_ffree;
1806         }
1807
1808         RETURN(rc);
1809 }
1810 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1811 {
1812         struct super_block *sb = de->d_sb;
1813         struct obd_statfs osfs;
1814         __u64 fsid = huge_encode_dev(sb->s_dev);
1815         int rc;
1816
1817         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1818         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1819
1820         /* Some amount of caching on the client is allowed */
1821         rc = ll_statfs_internal(sb, &osfs,
1822                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1823                                 0);
1824         if (rc)
1825                 return rc;
1826
1827         statfs_unpack(sfs, &osfs);
1828
1829         /* We need to downshift for all 32-bit kernels, because we can't
1830          * tell if the kernel is being called via sys_statfs64() or not.
1831          * Stop before overflowing f_bsize - in which case it is better
1832          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1833         if (sizeof(long) < 8) {
1834                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1835                         sfs->f_bsize <<= 1;
1836
1837                         osfs.os_blocks >>= 1;
1838                         osfs.os_bfree >>= 1;
1839                         osfs.os_bavail >>= 1;
1840                 }
1841         }
1842
1843         sfs->f_blocks = osfs.os_blocks;
1844         sfs->f_bfree = osfs.os_bfree;
1845         sfs->f_bavail = osfs.os_bavail;
1846         sfs->f_fsid.val[0] = (__u32)fsid;
1847         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1848         return 0;
1849 }
1850
1851 void ll_inode_size_lock(struct inode *inode)
1852 {
1853         struct ll_inode_info *lli;
1854
1855         LASSERT(!S_ISDIR(inode->i_mode));
1856
1857         lli = ll_i2info(inode);
1858         mutex_lock(&lli->lli_size_mutex);
1859 }
1860
1861 void ll_inode_size_unlock(struct inode *inode)
1862 {
1863         struct ll_inode_info *lli;
1864
1865         lli = ll_i2info(inode);
1866         mutex_unlock(&lli->lli_size_mutex);
1867 }
1868
1869 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1870 {
1871         struct ll_inode_info *lli = ll_i2info(inode);
1872         struct mdt_body *body = md->body;
1873         struct lov_stripe_md *lsm = md->lsm;
1874         struct ll_sb_info *sbi = ll_i2sbi(inode);
1875
1876         LASSERT((lsm != NULL) == ((body->mbo_valid & OBD_MD_FLEASIZE) != 0));
1877         if (lsm != NULL) {
1878                 if (!lli->lli_has_smd &&
1879                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1880                         cl_file_inode_init(inode, md);
1881
1882                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1883                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1884                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1885         }
1886
1887         if (S_ISDIR(inode->i_mode)) {
1888                 int     rc;
1889
1890                 rc = ll_update_lsm_md(inode, md);
1891                 if (rc != 0)
1892                         return rc;
1893         }
1894
1895         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1896                 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1897                         ll_update_remote_perm(inode, md->remote_perm);
1898         }
1899 #ifdef CONFIG_FS_POSIX_ACL
1900         else if (body->mbo_valid & OBD_MD_FLACL) {
1901                 spin_lock(&lli->lli_lock);
1902                 if (lli->lli_posix_acl)
1903                         posix_acl_release(lli->lli_posix_acl);
1904                 lli->lli_posix_acl = md->posix_acl;
1905                 spin_unlock(&lli->lli_lock);
1906         }
1907 #endif
1908         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1909                                         sbi->ll_flags & LL_SBI_32BIT_API);
1910         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1911
1912         if (body->mbo_valid & OBD_MD_FLATIME) {
1913                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1914                         LTIME_S(inode->i_atime) = body->mbo_atime;
1915                 lli->lli_atime = body->mbo_atime;
1916         }
1917
1918         if (body->mbo_valid & OBD_MD_FLMTIME) {
1919                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1920                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1921                                "to "LPU64"\n", inode->i_ino,
1922                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1923                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1924                 }
1925                 lli->lli_mtime = body->mbo_mtime;
1926         }
1927
1928         if (body->mbo_valid & OBD_MD_FLCTIME) {
1929                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1930                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1931                 lli->lli_ctime = body->mbo_ctime;
1932         }
1933
1934         if (body->mbo_valid & OBD_MD_FLMODE)
1935                 inode->i_mode = (inode->i_mode & S_IFMT) |
1936                                 (body->mbo_mode & ~S_IFMT);
1937
1938         if (body->mbo_valid & OBD_MD_FLTYPE)
1939                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1940                                 (body->mbo_mode & S_IFMT);
1941
1942         LASSERT(inode->i_mode != 0);
1943         if (S_ISREG(inode->i_mode))
1944                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1945                                        LL_MAX_BLKSIZE_BITS);
1946         else
1947                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1948
1949         if (body->mbo_valid & OBD_MD_FLUID)
1950                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1951         if (body->mbo_valid & OBD_MD_FLGID)
1952                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1953         if (body->mbo_valid & OBD_MD_FLFLAGS)
1954                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1955         if (body->mbo_valid & OBD_MD_FLNLINK)
1956                 set_nlink(inode, body->mbo_nlink);
1957         if (body->mbo_valid & OBD_MD_FLRDEV)
1958                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1959
1960         if (body->mbo_valid & OBD_MD_FLID) {
1961                 /* FID shouldn't be changed! */
1962                 if (fid_is_sane(&lli->lli_fid)) {
1963                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1964                                  "Trying to change FID "DFID
1965                                  " to the "DFID", inode "DFID"(%p)\n",
1966                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1967                                  PFID(ll_inode2fid(inode)), inode);
1968                 } else {
1969                         lli->lli_fid = body->mbo_fid1;
1970                 }
1971         }
1972
1973         LASSERT(fid_seq(&lli->lli_fid) != 0);
1974
1975         if (body->mbo_valid & OBD_MD_FLSIZE) {
1976                 i_size_write(inode, body->mbo_size);
1977
1978                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1979                        PFID(ll_inode2fid(inode)),
1980                        (unsigned long long)body->mbo_size);
1981
1982                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1983                         inode->i_blocks = body->mbo_blocks;
1984         }
1985
1986         if (body->mbo_valid & OBD_MD_FLMDSCAPA) {
1987                 LASSERT(md->mds_capa);
1988                 ll_add_capa(inode, md->mds_capa);
1989         }
1990
1991         if (body->mbo_valid & OBD_MD_FLOSSCAPA) {
1992                 LASSERT(md->oss_capa);
1993                 ll_add_capa(inode, md->oss_capa);
1994         }
1995
1996         if (body->mbo_valid & OBD_MD_TSTATE) {
1997                 if (body->mbo_t_state & MS_RESTORE)
1998                         lli->lli_flags |= LLIF_FILE_RESTORING;
1999         }
2000
2001         return 0;
2002 }
2003
2004 int ll_read_inode2(struct inode *inode, void *opaque)
2005 {
2006         struct lustre_md *md = opaque;
2007         struct ll_inode_info *lli = ll_i2info(inode);
2008         int     rc;
2009         ENTRY;
2010
2011         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2012                PFID(&lli->lli_fid), inode);
2013
2014         LASSERT(!lli->lli_has_smd);
2015
2016         /* Core attributes from the MDS first.  This is a new inode, and
2017          * the VFS doesn't zero times in the core inode so we have to do
2018          * it ourselves.  They will be overwritten by either MDS or OST
2019          * attributes - we just need to make sure they aren't newer. */
2020         LTIME_S(inode->i_mtime) = 0;
2021         LTIME_S(inode->i_atime) = 0;
2022         LTIME_S(inode->i_ctime) = 0;
2023         inode->i_rdev = 0;
2024         rc = ll_update_inode(inode, md);
2025         if (rc != 0)
2026                 RETURN(rc);
2027
2028         /* OIDEBUG(inode); */
2029
2030         /* initializing backing dev info. */
2031         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2032
2033
2034         if (S_ISREG(inode->i_mode)) {
2035                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2036                 inode->i_op = &ll_file_inode_operations;
2037                 inode->i_fop = sbi->ll_fop;
2038                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2039                 EXIT;
2040         } else if (S_ISDIR(inode->i_mode)) {
2041                 inode->i_op = &ll_dir_inode_operations;
2042                 inode->i_fop = &ll_dir_operations;
2043                 EXIT;
2044         } else if (S_ISLNK(inode->i_mode)) {
2045                 inode->i_op = &ll_fast_symlink_inode_operations;
2046                 EXIT;
2047         } else {
2048                 inode->i_op = &ll_special_inode_operations;
2049
2050                 init_special_inode(inode, inode->i_mode,
2051                                    inode->i_rdev);
2052
2053                 EXIT;
2054         }
2055
2056         return 0;
2057 }
2058
2059 void ll_delete_inode(struct inode *inode)
2060 {
2061         struct ll_inode_info *lli = ll_i2info(inode);
2062         ENTRY;
2063
2064         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2065                 /* It is last chance to write out dirty pages,
2066                  * otherwise we may lose data while umount */
2067                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2068
2069         truncate_inode_pages_final(&inode->i_data);
2070
2071         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2072                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2073                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2074
2075 #ifdef HAVE_SBOPS_EVICT_INODE
2076         ll_clear_inode(inode);
2077 #endif
2078         clear_inode(inode);
2079
2080         EXIT;
2081 }
2082
2083 int ll_iocontrol(struct inode *inode, struct file *file,
2084                  unsigned int cmd, unsigned long arg)
2085 {
2086         struct ll_sb_info *sbi = ll_i2sbi(inode);
2087         struct ptlrpc_request *req = NULL;
2088         int rc, flags = 0;
2089         ENTRY;
2090
2091         switch(cmd) {
2092         case FSFILT_IOC_GETFLAGS: {
2093                 struct mdt_body *body;
2094                 struct md_op_data *op_data;
2095
2096                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2097                                              0, 0, LUSTRE_OPC_ANY,
2098                                              NULL);
2099                 if (IS_ERR(op_data))
2100                         RETURN(PTR_ERR(op_data));
2101
2102                 op_data->op_valid = OBD_MD_FLFLAGS;
2103                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2104                 ll_finish_md_op_data(op_data);
2105                 if (rc) {
2106                         CERROR("%s: failure inode "DFID": rc = %d\n",
2107                                sbi->ll_md_exp->exp_obd->obd_name,
2108                                PFID(ll_inode2fid(inode)), rc);
2109                         RETURN(-abs(rc));
2110                 }
2111
2112                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2113
2114                 flags = body->mbo_flags;
2115
2116                 ptlrpc_req_finished(req);
2117
2118                 RETURN(put_user(flags, (int __user *)arg));
2119         }
2120         case FSFILT_IOC_SETFLAGS: {
2121                 struct iattr *attr;
2122                 struct md_op_data *op_data;
2123                 struct cl_object *obj;
2124                 struct obd_capa *capa;
2125
2126                 if (get_user(flags, (int __user *)arg))
2127                         RETURN(-EFAULT);
2128
2129                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2130                                              LUSTRE_OPC_ANY, NULL);
2131                 if (IS_ERR(op_data))
2132                         RETURN(PTR_ERR(op_data));
2133
2134                 op_data->op_attr_flags = flags;
2135                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2136                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2137                 ll_finish_md_op_data(op_data);
2138                 ptlrpc_req_finished(req);
2139                 if (rc)
2140                         RETURN(rc);
2141
2142                 inode->i_flags = ll_ext_to_inode_flags(flags);
2143
2144                 obj = ll_i2info(inode)->lli_clob;
2145                 if (obj == NULL)
2146                         RETURN(0);
2147
2148                 OBD_ALLOC_PTR(attr);
2149                 if (attr == NULL)
2150                         RETURN(-ENOMEM);
2151
2152                 attr->ia_valid = ATTR_ATTR_FLAG;
2153
2154                 capa = ll_mdscapa_get(inode);
2155                 rc = cl_setattr_ost(obj, attr, flags, capa);
2156                 capa_put(capa);
2157
2158                 OBD_FREE_PTR(attr);
2159                 RETURN(rc);
2160         }
2161         default:
2162                 RETURN(-ENOSYS);
2163         }
2164
2165         RETURN(0);
2166 }
2167
2168 int ll_flush_ctx(struct inode *inode)
2169 {
2170         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2171
2172         CDEBUG(D_SEC, "flush context for user %d\n",
2173                from_kuid(&init_user_ns, current_uid()));
2174
2175         obd_set_info_async(NULL, sbi->ll_md_exp,
2176                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2177                            0, NULL, NULL);
2178         obd_set_info_async(NULL, sbi->ll_dt_exp,
2179                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2180                            0, NULL, NULL);
2181         return 0;
2182 }
2183
2184 /* umount -f client means force down, don't save state */
2185 void ll_umount_begin(struct super_block *sb)
2186 {
2187         struct ll_sb_info *sbi = ll_s2sbi(sb);
2188         struct obd_device *obd;
2189         struct obd_ioctl_data *ioc_data;
2190         ENTRY;
2191
2192         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2193                sb->s_count, atomic_read(&sb->s_active));
2194
2195         obd = class_exp2obd(sbi->ll_md_exp);
2196         if (obd == NULL) {
2197                 CERROR("Invalid MDC connection handle "LPX64"\n",
2198                        sbi->ll_md_exp->exp_handle.h_cookie);
2199                 EXIT;
2200                 return;
2201         }
2202         obd->obd_force = 1;
2203
2204         obd = class_exp2obd(sbi->ll_dt_exp);
2205         if (obd == NULL) {
2206                 CERROR("Invalid LOV connection handle "LPX64"\n",
2207                        sbi->ll_dt_exp->exp_handle.h_cookie);
2208                 EXIT;
2209                 return;
2210         }
2211         obd->obd_force = 1;
2212
2213         OBD_ALLOC_PTR(ioc_data);
2214         if (ioc_data) {
2215                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2216                               sizeof *ioc_data, ioc_data, NULL);
2217
2218                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2219                               sizeof *ioc_data, ioc_data, NULL);
2220
2221                 OBD_FREE_PTR(ioc_data);
2222         }
2223
2224         /* Really, we'd like to wait until there are no requests outstanding,
2225          * and then continue.  For now, we just invalidate the requests,
2226          * schedule() and sleep one second if needed, and hope.
2227          */
2228         schedule();
2229         EXIT;
2230 }
2231
2232 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2233 {
2234         struct ll_sb_info *sbi = ll_s2sbi(sb);
2235         char *profilenm = get_profile_name(sb);
2236         int err;
2237         __u32 read_only;
2238
2239         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2240                 read_only = *flags & MS_RDONLY;
2241                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2242                                          sizeof(KEY_READ_ONLY),
2243                                          KEY_READ_ONLY, sizeof(read_only),
2244                                          &read_only, NULL);
2245                 if (err) {
2246                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2247                                       profilenm, read_only ?
2248                                       "read-only" : "read-write", err);
2249                         return err;
2250                 }
2251
2252                 if (read_only)
2253                         sb->s_flags |= MS_RDONLY;
2254                 else
2255                         sb->s_flags &= ~MS_RDONLY;
2256
2257                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2258                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2259                                       read_only ?  "read-only" : "read-write");
2260         }
2261         return 0;
2262 }
2263
2264 /**
2265  * Cleanup the open handle that is cached on MDT-side.
2266  *
2267  * For open case, the client side open handling thread may hit error
2268  * after the MDT grant the open. Under such case, the client should
2269  * send close RPC to the MDT as cleanup; otherwise, the open handle
2270  * on the MDT will be leaked there until the client umount or evicted.
2271  *
2272  * In further, if someone unlinked the file, because the open handle
2273  * holds the reference on such file/object, then it will block the
2274  * subsequent threads that want to locate such object via FID.
2275  *
2276  * \param[in] sb        super block for this file-system
2277  * \param[in] open_req  pointer to the original open request
2278  */
2279 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2280 {
2281         struct mdt_body                 *body;
2282         struct md_op_data               *op_data;
2283         struct ptlrpc_request           *close_req = NULL;
2284         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2285         ENTRY;
2286
2287         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2288         OBD_ALLOC_PTR(op_data);
2289         if (op_data == NULL) {
2290                 CWARN("%s: cannot allocate op_data to release open handle for "
2291                       DFID"\n",
2292                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2293
2294                 RETURN_EXIT;
2295         }
2296
2297         op_data->op_fid1 = body->mbo_fid1;
2298         op_data->op_handle = body->mbo_handle;
2299         op_data->op_mod_time = cfs_time_current_sec();
2300         md_close(exp, op_data, NULL, &close_req);
2301         ptlrpc_req_finished(close_req);
2302         ll_finish_md_op_data(op_data);
2303
2304         EXIT;
2305 }
2306
2307 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2308                   struct super_block *sb, struct lookup_intent *it)
2309 {
2310         struct ll_sb_info *sbi = NULL;
2311         struct lustre_md md = { NULL };
2312         int rc;
2313         ENTRY;
2314
2315         LASSERT(*inode || sb);
2316         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2317         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2318                               sbi->ll_md_exp, &md);
2319         if (rc != 0)
2320                 GOTO(cleanup, rc);
2321
2322         if (*inode) {
2323                 rc = ll_update_inode(*inode, &md);
2324                 if (rc != 0)
2325                         GOTO(out, rc);
2326         } else {
2327                 LASSERT(sb != NULL);
2328
2329                 /*
2330                  * At this point server returns to client's same fid as client
2331                  * generated for creating. So using ->fid1 is okay here.
2332                  */
2333                 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2334
2335                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2336                                              sbi->ll_flags & LL_SBI_32BIT_API),
2337                                  &md);
2338                 if (IS_ERR(*inode)) {
2339 #ifdef CONFIG_FS_POSIX_ACL
2340                         if (md.posix_acl) {
2341                                 posix_acl_release(md.posix_acl);
2342                                 md.posix_acl = NULL;
2343                         }
2344 #endif
2345                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2346                         *inode = NULL;
2347                         CERROR("new_inode -fatal: rc %d\n", rc);
2348                         GOTO(out, rc);
2349                 }
2350         }
2351
2352         /* Handling piggyback layout lock.
2353          * Layout lock can be piggybacked by getattr and open request.
2354          * The lsm can be applied to inode only if it comes with a layout lock
2355          * otherwise correct layout may be overwritten, for example:
2356          * 1. proc1: mdt returns a lsm but not granting layout
2357          * 2. layout was changed by another client
2358          * 3. proc2: refresh layout and layout lock granted
2359          * 4. proc1: to apply a stale layout */
2360         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2361                 struct lustre_handle lockh;
2362                 struct ldlm_lock *lock;
2363
2364                 lockh.cookie = it->d.lustre.it_lock_handle;
2365                 lock = ldlm_handle2lock(&lockh);
2366                 LASSERT(lock != NULL);
2367                 if (ldlm_has_layout(lock)) {
2368                         struct cl_object_conf conf;
2369
2370                         memset(&conf, 0, sizeof(conf));
2371                         conf.coc_opc = OBJECT_CONF_SET;
2372                         conf.coc_inode = *inode;
2373                         conf.coc_lock = lock;
2374                         conf.u.coc_md = &md;
2375                         (void)ll_layout_conf(*inode, &conf);
2376                 }
2377                 LDLM_LOCK_PUT(lock);
2378         }
2379
2380         GOTO(out, rc = 0);
2381
2382 out:
2383         if (md.lsm != NULL)
2384                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2385         md_free_lustre_md(sbi->ll_md_exp, &md);
2386
2387 cleanup:
2388         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2389                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2390
2391         return rc;
2392 }
2393
2394 int ll_obd_statfs(struct inode *inode, void __user *arg)
2395 {
2396         struct ll_sb_info *sbi = NULL;
2397         struct obd_export *exp;
2398         char *buf = NULL;
2399         struct obd_ioctl_data *data = NULL;
2400         __u32 type;
2401         __u32 __user flags;     /* not user, but obd_iocontrol is abused */
2402         int len = 0, rc;
2403
2404         if (!inode || !(sbi = ll_i2sbi(inode)))
2405                 GOTO(out_statfs, rc = -EINVAL);
2406
2407         rc = obd_ioctl_getdata(&buf, &len, arg);
2408         if (rc)
2409                 GOTO(out_statfs, rc);
2410
2411         data = (void*)buf;
2412         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2413             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2414                 GOTO(out_statfs, rc = -EINVAL);
2415
2416         if (data->ioc_inllen1 != sizeof(__u32) ||
2417             data->ioc_inllen2 != sizeof(__u32) ||
2418             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2419             data->ioc_plen2 != sizeof(struct obd_uuid))
2420                 GOTO(out_statfs, rc = -EINVAL);
2421
2422         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2423         if (type & LL_STATFS_LMV)
2424                 exp = sbi->ll_md_exp;
2425         else if (type & LL_STATFS_LOV)
2426                 exp = sbi->ll_dt_exp;
2427         else
2428                 GOTO(out_statfs, rc = -ENODEV);
2429
2430         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2431         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2432         if (rc)
2433                 GOTO(out_statfs, rc);
2434 out_statfs:
2435         if (buf)
2436                 obd_ioctl_freedata(buf, len);
2437         return rc;
2438 }
2439
2440 int ll_process_config(struct lustre_cfg *lcfg)
2441 {
2442         struct super_block *sb;
2443         unsigned long x;
2444         int rc = 0;
2445         char *ptr;
2446
2447         /* The instance name contains the sb: lustre-client-aacfe000 */
2448         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2449         if (!ptr || !*(++ptr))
2450                 return -EINVAL;
2451         if (sscanf(ptr, "%lx", &x) != 1)
2452                 return -EINVAL;
2453         sb = (struct super_block *)x;
2454         /* This better be a real Lustre superblock! */
2455         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2456
2457         /* Note we have not called client_common_fill_super yet, so
2458            proc fns must be able to handle that! */
2459         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2460                                       lcfg, sb);
2461         if (rc > 0)
2462                 rc = 0;
2463         return rc;
2464 }
2465
2466 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2467 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2468                                        struct inode *i1, struct inode *i2,
2469                                        const char *name, size_t namelen,
2470                                        __u32 mode, __u32 opc, void *data)
2471 {
2472         LASSERT(i1 != NULL);
2473
2474         if (name == NULL) {
2475                 /* Do not reuse namelen for something else. */
2476                 if (namelen != 0)
2477                         return ERR_PTR(-EINVAL);
2478         } else {
2479                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2480                         return ERR_PTR(-ENAMETOOLONG);
2481
2482                 if (!lu_name_is_valid_2(name, namelen))
2483                         return ERR_PTR(-EINVAL);
2484         }
2485
2486         if (op_data == NULL)
2487                 OBD_ALLOC_PTR(op_data);
2488
2489         if (op_data == NULL)
2490                 return ERR_PTR(-ENOMEM);
2491
2492         ll_i2gids(op_data->op_suppgids, i1, i2);
2493         op_data->op_fid1 = *ll_inode2fid(i1);
2494         op_data->op_capa1 = ll_mdscapa_get(i1);
2495         op_data->op_default_stripe_offset = -1;
2496         if (S_ISDIR(i1->i_mode)) {
2497                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2498                 if (opc == LUSTRE_OPC_MKDIR)
2499                         op_data->op_default_stripe_offset =
2500                                    ll_i2info(i1)->lli_def_stripe_offset;
2501         }
2502
2503         if (i2) {
2504                 op_data->op_fid2 = *ll_inode2fid(i2);
2505                 op_data->op_capa2 = ll_mdscapa_get(i2);
2506                 if (S_ISDIR(i2->i_mode))
2507                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2508         } else {
2509                 fid_zero(&op_data->op_fid2);
2510                 op_data->op_capa2 = NULL;
2511         }
2512
2513         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2514                 op_data->op_cli_flags |= CLI_HASH64;
2515
2516         if (ll_need_32bit_api(ll_i2sbi(i1)))
2517                 op_data->op_cli_flags |= CLI_API32;
2518
2519         op_data->op_name = name;
2520         op_data->op_namelen = namelen;
2521         op_data->op_mode = mode;
2522         op_data->op_mod_time = cfs_time_current_sec();
2523         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2524         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2525         op_data->op_cap = cfs_curproc_cap_pack();
2526         op_data->op_bias = 0;
2527         op_data->op_cli_flags = 0;
2528         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2529              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2530                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2531         } else {
2532                 op_data->op_mds = 0;
2533         }
2534         op_data->op_data = data;
2535
2536         /* When called by ll_setattr_raw, file is i1. */
2537         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2538                 op_data->op_bias |= MDS_DATA_MODIFIED;
2539
2540         return op_data;
2541 }
2542
2543 void ll_finish_md_op_data(struct md_op_data *op_data)
2544 {
2545         capa_put(op_data->op_capa1);
2546         capa_put(op_data->op_capa2);
2547         OBD_FREE_PTR(op_data);
2548 }
2549
2550 #ifdef HAVE_SUPEROPS_USE_DENTRY
2551 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2552 #else
2553 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2554 #endif
2555 {
2556         struct ll_sb_info *sbi;
2557
2558 #ifdef HAVE_SUPEROPS_USE_DENTRY
2559         LASSERT((seq != NULL) && (dentry != NULL));
2560         sbi = ll_s2sbi(dentry->d_sb);
2561 #else
2562         LASSERT((seq != NULL) && (vfs != NULL));
2563         sbi = ll_s2sbi(vfs->mnt_sb);
2564 #endif
2565
2566         if (sbi->ll_flags & LL_SBI_NOLCK)
2567                 seq_puts(seq, ",nolock");
2568
2569         if (sbi->ll_flags & LL_SBI_FLOCK)
2570                 seq_puts(seq, ",flock");
2571
2572         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2573                 seq_puts(seq, ",localflock");
2574
2575         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2576                 seq_puts(seq, ",user_xattr");
2577
2578         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2579                 seq_puts(seq, ",lazystatfs");
2580
2581         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2582                 seq_puts(seq, ",user_fid2path");
2583
2584         RETURN(0);
2585 }
2586
2587 /**
2588  * Get obd name by cmd, and copy out to user space
2589  */
2590 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2591 {
2592         struct ll_sb_info *sbi = ll_i2sbi(inode);
2593         struct obd_device *obd;
2594         ENTRY;
2595
2596         if (cmd == OBD_IOC_GETDTNAME)
2597                 obd = class_exp2obd(sbi->ll_dt_exp);
2598         else if (cmd == OBD_IOC_GETMDNAME)
2599                 obd = class_exp2obd(sbi->ll_md_exp);
2600         else
2601                 RETURN(-EINVAL);
2602
2603         if (!obd)
2604                 RETURN(-ENOENT);
2605
2606         if (copy_to_user((void __user *)arg, obd->obd_name,
2607                          strlen(obd->obd_name) + 1))
2608                 RETURN(-EFAULT);
2609
2610         RETURN(0);
2611 }
2612
2613 /**
2614  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2615  * fsname will be returned in this buffer; otherwise, a static buffer will be
2616  * used to store the fsname and returned to caller.
2617  */
2618 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2619 {
2620         static char fsname_static[MTI_NAME_MAXLEN];
2621         struct lustre_sb_info *lsi = s2lsi(sb);
2622         char *ptr;
2623         int len;
2624
2625         if (buf == NULL) {
2626                 /* this means the caller wants to use static buffer
2627                  * and it doesn't care about race. Usually this is
2628                  * in error reporting path */
2629                 buf = fsname_static;
2630                 buflen = sizeof(fsname_static);
2631         }
2632
2633         len = strlen(lsi->lsi_lmd->lmd_profile);
2634         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2635         if (ptr && (strcmp(ptr, "-client") == 0))
2636                 len -= 7;
2637
2638         if (unlikely(len >= buflen))
2639                 len = buflen - 1;
2640         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2641         buf[len] = '\0';
2642
2643         return buf;
2644 }
2645
2646 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2647 {
2648         char *path = NULL;
2649
2650         struct path p;
2651
2652         p.dentry = dentry;
2653         p.mnt = current->fs->root.mnt;
2654         path_get(&p);
2655         path = d_path(&p, buf, bufsize);
2656         path_put(&p);
2657         return path;
2658 }
2659
2660 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2661 {
2662         char *buf, *path = NULL;
2663         struct dentry *dentry = NULL;
2664         struct inode *inode = page->mapping->host;
2665
2666         /* this can be called inside spin lock so use GFP_ATOMIC. */
2667         buf = (char *)__get_free_page(GFP_ATOMIC);
2668         if (buf != NULL) {
2669                 dentry = d_find_alias(page->mapping->host);
2670                 if (dentry != NULL)
2671                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2672         }
2673
2674         CDEBUG(D_WARNING,
2675                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2676                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2677                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2678                PFID(ll_inode2fid(inode)),
2679                (path && !IS_ERR(path)) ? path : "", ioret);
2680
2681         if (dentry != NULL)
2682                 dput(dentry);
2683
2684         if (buf != NULL)
2685                 free_page((unsigned long)buf);
2686 }
2687
2688 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2689                         struct lov_user_md **kbuf)
2690 {
2691         struct lov_user_md      lum;
2692         ssize_t                 lum_size;
2693         ENTRY;
2694
2695         if (copy_from_user(&lum, md, sizeof(lum)))
2696                 RETURN(-EFAULT);
2697
2698         lum_size = ll_lov_user_md_size(&lum);
2699         if (lum_size < 0)
2700                 RETURN(lum_size);
2701
2702         OBD_ALLOC(*kbuf, lum_size);
2703         if (*kbuf == NULL)
2704                 RETURN(-ENOMEM);
2705
2706         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2707                 OBD_FREE(*kbuf, lum_size);
2708                 RETURN(-EFAULT);
2709         }
2710
2711         RETURN(lum_size);
2712 }
2713
2714 /*
2715  * Compute llite root squash state after a change of root squash
2716  * configuration setting or add/remove of a lnet nid
2717  */
2718 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2719 {
2720         struct root_squash_info *squash = &sbi->ll_squash;
2721         int i;
2722         bool matched;
2723         lnet_process_id_t id;
2724
2725         /* Update norootsquash flag */
2726         down_write(&squash->rsi_sem);
2727         if (list_empty(&squash->rsi_nosquash_nids))
2728                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2729         else {
2730                 /* Do not apply root squash as soon as one of our NIDs is
2731                  * in the nosquash_nids list */
2732                 matched = false;
2733                 i = 0;
2734                 while (LNetGetId(i++, &id) != -ENOENT) {
2735                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2736                                 continue;
2737                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2738                                 matched = true;
2739                                 break;
2740                         }
2741                 }
2742                 if (matched)
2743                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2744                 else
2745                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2746         }
2747         up_write(&squash->rsi_sem);
2748 }
2749
2750 /**
2751  * Parse linkea content to extract information about a given hardlink
2752  *
2753  * \param[in]   ldata      - Initialized linkea data
2754  * \param[in]   linkno     - Link identifier
2755  * \param[out]  parent_fid - The entry's parent FID
2756  * \param[out]  ln         - Entry name destination buffer
2757  *
2758  * \retval 0 on success
2759  * \retval Appropriate negative error code on failure
2760  */
2761 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2762                             struct lu_fid *parent_fid, struct lu_name *ln)
2763 {
2764         unsigned int    idx;
2765         int             rc;
2766         ENTRY;
2767
2768         rc = linkea_init(ldata);
2769         if (rc < 0)
2770                 RETURN(rc);
2771
2772         if (linkno >= ldata->ld_leh->leh_reccount)
2773                 /* beyond last link */
2774                 RETURN(-ENODATA);
2775
2776         linkea_first_entry(ldata);
2777         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2778                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2779                                     parent_fid);
2780                 if (idx == linkno)
2781                         break;
2782
2783                 linkea_next_entry(ldata);
2784         }
2785
2786         if (idx < linkno)
2787                 RETURN(-ENODATA);
2788
2789         RETURN(0);
2790 }
2791
2792 /**
2793  * Get parent FID and name of an identified link. Operation is performed for
2794  * a given link number, letting the caller iterate over linkno to list one or
2795  * all links of an entry.
2796  *
2797  * \param[in]     file - File descriptor against which to perform the operation
2798  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2799  *                       on and the available size. It is eventually filled with
2800  *                       the requested information or left untouched on error
2801  *
2802  * \retval - 0 on success
2803  * \retval - Appropriate negative error code on failure
2804  */
2805 int ll_getparent(struct file *file, struct getparent __user *arg)
2806 {
2807         struct dentry           *dentry = file->f_dentry;
2808         struct inode            *inode = file->f_dentry->d_inode;
2809         struct linkea_data      *ldata;
2810         struct lu_buf            buf = LU_BUF_NULL;
2811         struct lu_name           ln;
2812         struct lu_fid            parent_fid;
2813         __u32                    linkno;
2814         __u32                    name_size;
2815         int                      rc;
2816
2817         ENTRY;
2818
2819         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2820             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2821                 RETURN(-EPERM);
2822
2823         if (get_user(name_size, &arg->gp_name_size))
2824                 RETURN(-EFAULT);
2825
2826         if (get_user(linkno, &arg->gp_linkno))
2827                 RETURN(-EFAULT);
2828
2829         if (name_size > PATH_MAX)
2830                 RETURN(-EINVAL);
2831
2832         OBD_ALLOC(ldata, sizeof(*ldata));
2833         if (ldata == NULL)
2834                 RETURN(-ENOMEM);
2835
2836         rc = linkea_data_new(ldata, &buf);
2837         if (rc < 0)
2838                 GOTO(ldata_free, rc);
2839
2840         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2841         if (rc < 0)
2842                 GOTO(lb_free, rc);
2843
2844         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2845         if (rc < 0)
2846                 GOTO(lb_free, rc);
2847
2848         if (ln.ln_namelen >= name_size)
2849                 GOTO(lb_free, rc = -EOVERFLOW);
2850
2851         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2852                 GOTO(lb_free, rc = -EFAULT);
2853
2854         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2855                 GOTO(lb_free, rc = -EFAULT);
2856
2857         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2858                 GOTO(lb_free, rc = -EFAULT);
2859
2860 lb_free:
2861         lu_buf_free(&buf);
2862 ldata_free:
2863         OBD_FREE(ldata, sizeof(*ldata));
2864
2865         RETURN(rc);
2866 }