lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/statfs.h>
  41 #include <linux/time.h>
  42 #include <linux/types.h>
  43 #include <linux/version.h>
  44 #include <linux/mm.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <linux/security.h>
  50
  51 #include <uapi/linux/lustre/lustre_ioctl.h>
  52 #include <lustre_ha.h>
  53 #include <lustre_dlm.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_disk.h>
  56 #include <uapi/linux/lustre/lustre_param.h>
  57 #include <lustre_log.h>
  58 #include <cl_object.h>
  59 #include <obd_cksum.h>
  60 #include "llite_internal.h"
  61
  62 struct kmem_cache *ll_file_data_slab;
  63
  64 #ifndef log2
  65 #define log2(n) ffz(~(n))
  66 #endif
  67
  68 static struct ll_sb_info *ll_init_sbi(void)
  69 {
  70         struct ll_sb_info *sbi = NULL;
  71         unsigned long pages;
  72         unsigned long lru_page_max;
  73         struct sysinfo si;
  74         class_uuid_t uuid;
  75         int i;
  76         ENTRY;
  77
  78         OBD_ALLOC_PTR(sbi);
  79         if (sbi == NULL)
  80                 RETURN(NULL);
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         lru_page_max = pages / 2;
  91
  92         /* initialize ll_cache data */
  93         sbi->ll_cache = cl_cache_init(lru_page_max);
  94         if (sbi->ll_cache == NULL) {
  95                 OBD_FREE(sbi, sizeof(*sbi));
  96                 RETURN(NULL);
  97         }
  98
  99         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 100                                            SBI_DEFAULT_READAHEAD_MAX);
 101         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 102         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 103
 104         ll_generate_random_uuid(uuid);
 105         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 106         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 107
 108         sbi->ll_flags |= LL_SBI_VERBOSE;
 109 #ifdef ENABLE_CHECKSUM
 110         sbi->ll_flags |= LL_SBI_CHECKSUM;
 111 #endif
 112
 113 #ifdef HAVE_LRU_RESIZE_SUPPORT
 114         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 115 #endif
 116         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 117
 118         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 119                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 120                                pp_r_hist.oh_lock);
 121                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 122                                pp_w_hist.oh_lock);
 123         }
 124
 125         /* metadata statahead is enabled by default */
 126         sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
 127         sbi->ll_sa_max = LL_SA_RPC_DEF;
 128         atomic_set(&sbi->ll_sa_total, 0);
 129         atomic_set(&sbi->ll_sa_wrong, 0);
 130         atomic_set(&sbi->ll_sa_running, 0);
 131         atomic_set(&sbi->ll_agl_total, 0);
 132         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 133         sbi->ll_flags |= LL_SBI_FAST_READ;
 134         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 135
 136         /* root squash */
 137         sbi->ll_squash.rsi_uid = 0;
 138         sbi->ll_squash.rsi_gid = 0;
 139         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 140         init_rwsem(&sbi->ll_squash.rsi_sem);
 141
 142         RETURN(sbi);
 143 }
 144
 145 static void ll_free_sbi(struct super_block *sb)
 146 {
 147         struct ll_sb_info *sbi = ll_s2sbi(sb);
 148         ENTRY;
 149
 150         if (sbi != NULL) {
 151                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 152                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 153                 if (sbi->ll_cache != NULL) {
 154                         cl_cache_decref(sbi->ll_cache);
 155                         sbi->ll_cache = NULL;
 156                 }
 157                 OBD_FREE(sbi, sizeof(*sbi));
 158         }
 159         EXIT;
 160 }
 161
 162 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 163                                     struct vfsmount *mnt)
 164 {
 165         struct inode *root = NULL;
 166         struct ll_sb_info *sbi = ll_s2sbi(sb);
 167         struct obd_statfs *osfs = NULL;
 168         struct ptlrpc_request *request = NULL;
 169         struct obd_connect_data *data = NULL;
 170         struct obd_uuid *uuid;
 171         struct md_op_data *op_data;
 172         struct lustre_md lmd;
 173         u64 valid;
 174         int size, err, checksum;
 175
 176         ENTRY;
 177         sbi->ll_md_obd = class_name2obd(md);
 178         if (!sbi->ll_md_obd) {
 179                 CERROR("MD %s: not setup or attached\n", md);
 180                 RETURN(-EINVAL);
 181         }
 182
 183         OBD_ALLOC_PTR(data);
 184         if (data == NULL)
 185                 RETURN(-ENOMEM);
 186
 187         OBD_ALLOC_PTR(osfs);
 188         if (osfs == NULL) {
 189                 OBD_FREE_PTR(data);
 190                 RETURN(-ENOMEM);
 191         }
 192
 193         /* pass client page size via ocd_grant_blkbits, the server should report
 194          * back its backend blocksize for grant calculation purpose */
 195         data->ocd_grant_blkbits = PAGE_SHIFT;
 196
 197         /* indicate MDT features supported by this client */
 198         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 199                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 200                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 201                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 202                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 203                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 204                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 205                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 206                                   OBD_CONNECT_64BITHASH |
 207                                   OBD_CONNECT_EINPROGRESS |
 208                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 209                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 210                                   OBD_CONNECT_MAX_EASIZE |
 211                                   OBD_CONNECT_FLOCK_DEAD |
 212                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 213                                   OBD_CONNECT_OPEN_BY_FID |
 214                                   OBD_CONNECT_DIR_STRIPE |
 215                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 216                                   OBD_CONNECT_SUBTREE |
 217                                   OBD_CONNECT_MULTIMODRPCS |
 218                                   OBD_CONNECT_GRANT_PARAM |
 219                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 220
 221         data->ocd_connect_flags2 = OBD_CONNECT2_FLR |
 222                                    OBD_CONNECT2_LOCK_CONVERT |
 223                                    OBD_CONNECT2_DIR_MIGRATE |
 224                                    OBD_CONNECT2_SUM_STATFS;
 225
 226 #ifdef HAVE_LRU_RESIZE_SUPPORT
 227         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 228                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 229 #endif
 230 #ifdef CONFIG_FS_POSIX_ACL
 231         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 232                                    OBD_CONNECT_LARGE_ACL;
 233 #endif
 234
 235         data->ocd_cksum_types = obd_cksum_types_supported_client();
 236
 237         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 238                 /* flag mdc connection as lightweight, only used for test
 239                  * purpose, use with care */
 240                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 241
 242         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 243         data->ocd_version = LUSTRE_VERSION_CODE;
 244
 245         if (sb->s_flags & MS_RDONLY)
 246                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 247         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 248                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 249
 250 #ifdef MS_NOSEC
 251         /* Setting this indicates we correctly support S_NOSEC (See kernel
 252          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 253          */
 254         sb->s_flags |= MS_NOSEC;
 255 #endif
 256
 257         if (sbi->ll_flags & LL_SBI_FLOCK)
 258                 sbi->ll_fop = &ll_file_operations_flock;
 259         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 260                 sbi->ll_fop = &ll_file_operations;
 261         else
 262                 sbi->ll_fop = &ll_file_operations_noflock;
 263
 264         /* always ping even if server suppress_pings */
 265         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 266                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 267
 268         obd_connect_set_secctx(data);
 269
 270         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 271
 272         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 273                           &sbi->ll_sb_uuid, data, NULL);
 274         if (err == -EBUSY) {
 275                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 276                                    "recovery, of which this client is not a "
 277                                    "part. Please wait for recovery to complete,"
 278                                    " abort, or time out.\n", md);
 279                 GOTO(out, err);
 280         } else if (err) {
 281                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 282                 GOTO(out, err);
 283         }
 284
 285         sbi->ll_md_exp->exp_connect_data = *data;
 286
 287         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 288                            LUSTRE_SEQ_METADATA);
 289         if (err) {
 290                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 291                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 292                 GOTO(out_md, err);
 293         }
 294
 295         /* For mount, we only need fs info from MDT0, and also in DNE, it
 296          * can make sure the client can be mounted as long as MDT0 is
 297          * avaible */
 298         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 299                         ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 300                         OBD_STATFS_FOR_MDT0);
 301         if (err)
 302                 GOTO(out_md_fid, err);
 303
 304         /* This needs to be after statfs to ensure connect has finished.
 305          * Note that "data" does NOT contain the valid connect reply.
 306          * If connecting to a 1.8 server there will be no LMV device, so
 307          * we can access the MDC export directly and exp_connect_flags will
 308          * be non-zero, but if accessing an upgraded 2.1 server it will
 309          * have the correct flags filled in.
 310          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 311         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 312         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 313             valid != CLIENT_CONNECT_MDT_REQD) {
 314                 char *buf;
 315
 316                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 317                 obd_connect_flags2str(buf, PAGE_SIZE,
 318                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 319                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 320                                    "feature(s) needed for correct operation "
 321                                    "of this client (%s). Please upgrade "
 322                                    "server or downgrade client.\n",
 323                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 324                 OBD_FREE(buf, PAGE_SIZE);
 325                 GOTO(out_md_fid, err = -EPROTO);
 326         }
 327
 328         size = sizeof(*data);
 329         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 330                            KEY_CONN_DATA,  &size, data);
 331         if (err) {
 332                 CERROR("%s: Get connect data failed: rc = %d\n",
 333                        sbi->ll_md_exp->exp_obd->obd_name, err);
 334                 GOTO(out_md_fid, err);
 335         }
 336
 337         LASSERT(osfs->os_bsize);
 338         sb->s_blocksize = osfs->os_bsize;
 339         sb->s_blocksize_bits = log2(osfs->os_bsize);
 340         sb->s_magic = LL_SUPER_MAGIC;
 341         sb->s_maxbytes = MAX_LFS_FILESIZE;
 342         sbi->ll_namelen = osfs->os_namelen;
 343         sbi->ll_mnt.mnt = current->fs->root.mnt;
 344
 345         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 346             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 347                 LCONSOLE_INFO("Disabling user_xattr feature because "
 348                               "it is not supported on the server\n");
 349                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 350         }
 351
 352         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 353 #ifdef MS_POSIXACL
 354                 sb->s_flags |= MS_POSIXACL;
 355 #endif
 356                 sbi->ll_flags |= LL_SBI_ACL;
 357         } else {
 358                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 359 #ifdef MS_POSIXACL
 360                 sb->s_flags &= ~MS_POSIXACL;
 361 #endif
 362                 sbi->ll_flags &= ~LL_SBI_ACL;
 363         }
 364
 365         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 366                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 367
 368         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 369                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 370
 371         if (obd_connect_has_secctx(data))
 372                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 373
 374         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 375                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 376                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 377                                       "unknown maximum xattr size.\n", dt);
 378                 } else if (!sbi->ll_xattr_cache_set) {
 379                         /* If xattr_cache is already set (no matter 0 or 1)
 380                          * during processing llog, it won't be enabled here. */
 381                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 382                         sbi->ll_xattr_cache_enabled = 1;
 383                 }
 384         }
 385
 386         sbi->ll_dt_obd = class_name2obd(dt);
 387         if (!sbi->ll_dt_obd) {
 388                 CERROR("DT %s: not setup or attached\n", dt);
 389                 GOTO(out_md_fid, err = -ENODEV);
 390         }
 391
 392         /* pass client page size via ocd_grant_blkbits, the server should report
 393          * back its backend blocksize for grant calculation purpose */
 394         data->ocd_grant_blkbits = PAGE_SHIFT;
 395
 396         /* indicate OST features supported by this client */
 397         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 398                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 399                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 400                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 401                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 402                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 403                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 404                                   OBD_CONNECT_EINPROGRESS |
 405                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 406                                   OBD_CONNECT_LAYOUTLOCK |
 407                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 408                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 409                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 410
 411 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 412  * can interoperate with an older version of lockahead which was released prior
 413  * to landing in master. This support will be dropped when 2.13 development
 414  * starts.  At the point, we should not just drop the connect flag (below), we
 415  * should also remove the support in the code.
 416  *
 417  * Removing it means a few things:
 418  * 1. Remove this section here
 419  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 420  * 3. Remove function exp_connect_lockahead_old
 421  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 422  * */
 423 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 424         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 425 #endif
 426
 427         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
 428
 429         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 430                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 431
 432         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 433          * disabled by default, because it can still be enabled on the
 434          * fly via /sys. As a consequence, we still need to come to an
 435          * agreement on the supported algorithms at connect time
 436          */
 437         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 438
 439         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 440                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 441         else
 442                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 443
 444 #ifdef HAVE_LRU_RESIZE_SUPPORT
 445         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 446 #endif
 447         /* always ping even if server suppress_pings */
 448         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 449                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 450
 451         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 452                "ocd_grant: %d\n", data->ocd_connect_flags,
 453                data->ocd_version, data->ocd_grant);
 454
 455         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 456         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 457
 458         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 459
 460         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 461                           &sbi->ll_sb_uuid, data, NULL);
 462         if (err == -EBUSY) {
 463                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 464                                    "recovery, of which this client is not a "
 465                                    "part.  Please wait for recovery to "
 466                                    "complete, abort, or time out.\n", dt);
 467                 GOTO(out_md, err);
 468         } else if (err) {
 469                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 470                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 471                 GOTO(out_md, err);
 472         }
 473
 474         sbi->ll_dt_exp->exp_connect_data = *data;
 475
 476         /* Don't change value if it was specified in the config log */
 477         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
 478                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 479                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 480                               (data->ocd_brw_size >> PAGE_SHIFT));
 481
 482         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 483                            LUSTRE_SEQ_METADATA);
 484         if (err) {
 485                 CERROR("%s: Can't init data layer FID infrastructure, "
 486                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 487                 GOTO(out_dt, err);
 488         }
 489
 490         mutex_lock(&sbi->ll_lco.lco_lock);
 491         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 492         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 493         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 494         mutex_unlock(&sbi->ll_lco.lco_lock);
 495
 496         fid_zero(&sbi->ll_root_fid);
 497         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 498                            &sbi->ll_root_fid);
 499         if (err) {
 500                 CERROR("cannot mds_connect: rc = %d\n", err);
 501                 GOTO(out_lock_cn_cb, err);
 502         }
 503         if (!fid_is_sane(&sbi->ll_root_fid)) {
 504                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 505                        sbi->ll_md_exp->exp_obd->obd_name,
 506                        PFID(&sbi->ll_root_fid));
 507                 GOTO(out_lock_cn_cb, err = -EINVAL);
 508         }
 509         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 510
 511         sb->s_op = &lustre_super_operations;
 512 #ifdef HAVE_XATTR_HANDLER_FLAGS
 513         sb->s_xattr = ll_xattr_handlers;
 514 #endif
 515 #if THREAD_SIZE >= 8192 /*b=17630*/
 516         sb->s_export_op = &lustre_export_operations;
 517 #endif
 518
 519         /* make root inode
 520          * XXX: move this to after cbd setup? */
 521         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 522         if (sbi->ll_flags & LL_SBI_ACL)
 523                 valid |= OBD_MD_FLACL;
 524
 525         OBD_ALLOC_PTR(op_data);
 526         if (op_data == NULL)
 527                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 528
 529         op_data->op_fid1 = sbi->ll_root_fid;
 530         op_data->op_mode = 0;
 531         op_data->op_valid = valid;
 532
 533         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 534
 535         OBD_FREE_PTR(op_data);
 536         if (err) {
 537                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 538                        sbi->ll_md_exp->exp_obd->obd_name, err);
 539                 GOTO(out_lock_cn_cb, err);
 540         }
 541
 542         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 543                                sbi->ll_md_exp, &lmd);
 544         if (err) {
 545                 CERROR("failed to understand root inode md: rc = %d\n", err);
 546                 ptlrpc_req_finished(request);
 547                 GOTO(out_lock_cn_cb, err);
 548         }
 549
 550         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 551         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 552                                             sbi->ll_flags & LL_SBI_32BIT_API),
 553                        &lmd);
 554         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 555         ptlrpc_req_finished(request);
 556
 557         if (IS_ERR(root)) {
 558 #ifdef CONFIG_FS_POSIX_ACL
 559                 if (lmd.posix_acl) {
 560                         posix_acl_release(lmd.posix_acl);
 561                         lmd.posix_acl = NULL;
 562                 }
 563 #endif
 564                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 565                 root = NULL;
 566                 CERROR("lustre_lite: bad iget4 for root\n");
 567                 GOTO(out_root, err);
 568         }
 569
 570         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 571         if (sbi->ll_checksum_set) {
 572                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 573                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 574                                          sizeof(checksum), &checksum, NULL);
 575                 if (err) {
 576                         CERROR("%s: Set checksum failed: rc = %d\n",
 577                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 578                         GOTO(out_root, err);
 579                 }
 580         }
 581         cl_sb_init(sb);
 582
 583         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 584                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 585                                  sbi->ll_cache, NULL);
 586         if (err) {
 587                 CERROR("%s: Set cache_set failed: rc = %d\n",
 588                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 589                 GOTO(out_root, err);
 590         }
 591
 592         sb->s_root = d_make_root(root);
 593         if (sb->s_root == NULL) {
 594                 CERROR("%s: can't make root dentry\n",
 595                         ll_get_fsname(sb, NULL, 0));
 596                 GOTO(out_root, err = -ENOMEM);
 597         }
 598 #ifdef HAVE_DCACHE_LOCK
 599         sb->s_root->d_op = &ll_d_ops;
 600 #endif
 601
 602         sbi->ll_sdev_orig = sb->s_dev;
 603
 604         /* We set sb->s_dev equal on all lustre clients in order to support
 605          * NFS export clustering.  NFSD requires that the FSID be the same
 606          * on all clients. */
 607         /* s_dev is also used in lt_compare() to compare two fs, but that is
 608          * only a node-local comparison. */
 609         uuid = obd_get_uuid(sbi->ll_md_exp);
 610         if (uuid != NULL)
 611                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 612
 613         if (data != NULL)
 614                 OBD_FREE_PTR(data);
 615         if (osfs != NULL)
 616                 OBD_FREE_PTR(osfs);
 617
 618         if (sbi->ll_dt_obd) {
 619                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 620                                         &sbi->ll_dt_obd->obd_kset.kobj,
 621                                         sbi->ll_dt_obd->obd_type->typ_name);
 622                 if (err < 0) {
 623                         CERROR("%s: could not register %s in llite: rc = %d\n",
 624                                dt, ll_get_fsname(sb, NULL, 0), err);
 625                         err = 0;
 626                 }
 627         }
 628
 629         if (sbi->ll_md_obd) {
 630                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 631                                         &sbi->ll_md_obd->obd_kset.kobj,
 632                                         sbi->ll_md_obd->obd_type->typ_name);
 633                 if (err < 0) {
 634                         CERROR("%s: could not register %s in llite: rc = %d\n",
 635                                md, ll_get_fsname(sb, NULL, 0), err);
 636                         err = 0;
 637                 }
 638         }
 639
 640         RETURN(err);
 641 out_root:
 642         if (root)
 643                 iput(root);
 644 out_lock_cn_cb:
 645         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 646 out_dt:
 647         obd_disconnect(sbi->ll_dt_exp);
 648         sbi->ll_dt_exp = NULL;
 649         sbi->ll_dt_obd = NULL;
 650 out_md_fid:
 651         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 652 out_md:
 653         obd_disconnect(sbi->ll_md_exp);
 654         sbi->ll_md_exp = NULL;
 655         sbi->ll_md_obd = NULL;
 656 out:
 657         if (data != NULL)
 658                 OBD_FREE_PTR(data);
 659         if (osfs != NULL)
 660                 OBD_FREE_PTR(osfs);
 661         return err;
 662 }
 663
 664 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 665 {
 666         int size, rc;
 667
 668         size = sizeof(*lmmsize);
 669         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 670                           KEY_MAX_EASIZE, &size, lmmsize);
 671         if (rc != 0) {
 672                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 673                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 674                 RETURN(rc);
 675         }
 676
 677         size = sizeof(int);
 678         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 679                           KEY_MAX_EASIZE, &size, lmmsize);
 680         if (rc)
 681                 CERROR("Get max mdsize error rc %d\n", rc);
 682
 683         RETURN(rc);
 684 }
 685
 686 /**
 687  * Get the value of the default_easize parameter.
 688  *
 689  * \see client_obd::cl_default_mds_easize
 690  *
 691  * \param[in] sbi       superblock info for this filesystem
 692  * \param[out] lmmsize  pointer to storage location for value
 693  *
 694  * \retval 0            on success
 695  * \retval negative     negated errno on failure
 696  */
 697 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 698 {
 699         int size, rc;
 700
 701         size = sizeof(int);
 702         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 703                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 704         if (rc)
 705                 CERROR("Get default mdsize error rc %d\n", rc);
 706
 707         RETURN(rc);
 708 }
 709
 710 /**
 711  * Set the default_easize parameter to the given value.
 712  *
 713  * \see client_obd::cl_default_mds_easize
 714  *
 715  * \param[in] sbi       superblock info for this filesystem
 716  * \param[in] lmmsize   the size to set
 717  *
 718  * \retval 0            on success
 719  * \retval negative     negated errno on failure
 720  */
 721 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 722 {
 723         int rc;
 724
 725         if (lmmsize < sizeof(struct lov_mds_md) ||
 726             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 727                 return -EINVAL;
 728
 729         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 730                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 731                                 sizeof(int), &lmmsize, NULL);
 732
 733         RETURN(rc);
 734 }
 735
 736 static void client_common_put_super(struct super_block *sb)
 737 {
 738         struct ll_sb_info *sbi = ll_s2sbi(sb);
 739         ENTRY;
 740
 741         cl_sb_fini(sb);
 742
 743         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 744         obd_disconnect(sbi->ll_dt_exp);
 745         sbi->ll_dt_exp = NULL;
 746
 747         ll_debugfs_unregister_super(sb);
 748
 749         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 750         obd_disconnect(sbi->ll_md_exp);
 751         sbi->ll_md_exp = NULL;
 752
 753         EXIT;
 754 }
 755
 756 void ll_kill_super(struct super_block *sb)
 757 {
 758         struct ll_sb_info *sbi;
 759         ENTRY;
 760
 761         /* not init sb ?*/
 762         if (!(sb->s_flags & MS_ACTIVE))
 763                 return;
 764
 765         sbi = ll_s2sbi(sb);
 766         /* we need restore s_dev from changed for clustred NFS before put_super
 767          * because new kernels have cached s_dev and change sb->s_dev in
 768          * put_super not affected real removing devices */
 769         if (sbi) {
 770                 sb->s_dev = sbi->ll_sdev_orig;
 771                 sbi->ll_umounting = 1;
 772
 773                 /* wait running statahead threads to quit */
 774                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 775                         set_current_state(TASK_UNINTERRUPTIBLE);
 776                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 777                 }
 778         }
 779
 780         EXIT;
 781 }
 782
 783 static inline int ll_set_opt(const char *opt, char *data, int fl)
 784 {
 785         if (strncmp(opt, data, strlen(opt)) != 0)
 786                 return 0;
 787         else
 788                 return fl;
 789 }
 790
 791 /* non-client-specific mount options are parsed in lmd_parse */
 792 static int ll_options(char *options, struct ll_sb_info *sbi)
 793 {
 794         int tmp;
 795         char *s1 = options, *s2;
 796         int *flags = &sbi->ll_flags;
 797         ENTRY;
 798
 799         if (!options)
 800                 RETURN(0);
 801
 802         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 803
 804         while (*s1) {
 805                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 806                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 807                 if (tmp) {
 808                         *flags |= tmp;
 809                         goto next;
 810                 }
 811                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 812                 if (tmp) {
 813                         *flags |= tmp;
 814                         goto next;
 815                 }
 816                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 817                 if (tmp) {
 818                         *flags |= tmp;
 819                         goto next;
 820                 }
 821                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 822                 if (tmp) {
 823                         *flags &= ~tmp;
 824                         goto next;
 825                 }
 826                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 827                 if (tmp) {
 828                         *flags |= tmp;
 829                         goto next;
 830                 }
 831                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 832                 if (tmp) {
 833                         *flags &= ~tmp;
 834                         goto next;
 835                 }
 836                 tmp = ll_set_opt("context", s1, 1);
 837                 if (tmp)
 838                         goto next;
 839                 tmp = ll_set_opt("fscontext", s1, 1);
 840                 if (tmp)
 841                         goto next;
 842                 tmp = ll_set_opt("defcontext", s1, 1);
 843                 if (tmp)
 844                         goto next;
 845                 tmp = ll_set_opt("rootcontext", s1, 1);
 846                 if (tmp)
 847                         goto next;
 848                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 849                 if (tmp) {
 850                         *flags |= tmp;
 851                         goto next;
 852                 }
 853                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 854                 if (tmp) {
 855                         *flags &= ~tmp;
 856                         goto next;
 857                 }
 858
 859                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 860                 if (tmp) {
 861                         *flags |= tmp;
 862                         sbi->ll_checksum_set = 1;
 863                         goto next;
 864                 }
 865                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 866                 if (tmp) {
 867                         *flags &= ~tmp;
 868                         sbi->ll_checksum_set = 1;
 869                         goto next;
 870                 }
 871                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 872                 if (tmp) {
 873                         *flags |= tmp;
 874                         goto next;
 875                 }
 876                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 877                 if (tmp) {
 878                         *flags &= ~tmp;
 879                         goto next;
 880                 }
 881                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 882                 if (tmp) {
 883                         *flags |= tmp;
 884                         goto next;
 885                 }
 886                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 887                 if (tmp) {
 888                         *flags &= ~tmp;
 889                         goto next;
 890                 }
 891                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 892                 if (tmp) {
 893                         *flags |= tmp;
 894                         goto next;
 895                 }
 896                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 897                 if (tmp) {
 898                         *flags |= tmp;
 899                         goto next;
 900                 }
 901                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 902                 if (tmp) {
 903                         *flags &= ~tmp;
 904                         goto next;
 905                 }
 906                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 907                 if (tmp) {
 908                         *flags |= tmp;
 909                         goto next;
 910                 }
 911                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 912                                    s1);
 913                 RETURN(-EINVAL);
 914
 915 next:
 916                 /* Find next opt */
 917                 s2 = strchr(s1, ',');
 918                 if (s2 == NULL)
 919                         break;
 920                 s1 = s2 + 1;
 921         }
 922         RETURN(0);
 923 }
 924
 925 void ll_lli_init(struct ll_inode_info *lli)
 926 {
 927         lli->lli_inode_magic = LLI_INODE_MAGIC;
 928         lli->lli_flags = 0;
 929         spin_lock_init(&lli->lli_lock);
 930         lli->lli_posix_acl = NULL;
 931         /* Do not set lli_fid, it has been initialized already. */
 932         fid_zero(&lli->lli_pfid);
 933         lli->lli_mds_read_och = NULL;
 934         lli->lli_mds_write_och = NULL;
 935         lli->lli_mds_exec_och = NULL;
 936         lli->lli_open_fd_read_count = 0;
 937         lli->lli_open_fd_write_count = 0;
 938         lli->lli_open_fd_exec_count = 0;
 939         mutex_init(&lli->lli_och_mutex);
 940         spin_lock_init(&lli->lli_agl_lock);
 941         spin_lock_init(&lli->lli_layout_lock);
 942         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 943         lli->lli_clob = NULL;
 944
 945         init_rwsem(&lli->lli_xattrs_list_rwsem);
 946         mutex_init(&lli->lli_xattrs_enq_lock);
 947
 948         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 949         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 950                 mutex_init(&lli->lli_readdir_mutex);
 951                 lli->lli_opendir_key = NULL;
 952                 lli->lli_sai = NULL;
 953                 spin_lock_init(&lli->lli_sa_lock);
 954                 lli->lli_opendir_pid = 0;
 955                 lli->lli_sa_enabled = 0;
 956                 lli->lli_def_stripe_offset = -1;
 957                 init_rwsem(&lli->lli_lsm_sem);
 958         } else {
 959                 mutex_init(&lli->lli_size_mutex);
 960                 lli->lli_symlink_name = NULL;
 961                 init_rwsem(&lli->lli_trunc_sem);
 962                 range_lock_tree_init(&lli->lli_write_tree);
 963                 init_rwsem(&lli->lli_glimpse_sem);
 964                 lli->lli_glimpse_time = ktime_set(0, 0);
 965                 INIT_LIST_HEAD(&lli->lli_agl_list);
 966                 lli->lli_agl_index = 0;
 967                 lli->lli_async_rc = 0;
 968         }
 969         mutex_init(&lli->lli_layout_mutex);
 970         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
 971 }
 972
 973 #define MAX_STRING_SIZE 128
 974
 975 #ifndef HAVE_SUPER_SETUP_BDI_NAME
 976
 977 #define LSI_BDI_INITIALIZED     0x00400000
 978
 979 #ifndef HAVE_BDI_CAP_MAP_COPY
 980 # define BDI_CAP_MAP_COPY       0
 981 #endif
 982
 983 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
 984 {
 985         struct  lustre_sb_info *lsi = s2lsi(sb);
 986         char buf[MAX_STRING_SIZE];
 987         va_list args;
 988         int err;
 989
 990         err = bdi_init(&lsi->lsi_bdi);
 991         if (err)
 992                 return err;
 993
 994         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 995         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 996         lsi->lsi_bdi.name = "lustre";
 997         va_start(args, fmt);
 998         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
 999         va_end(args);
1000         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1001         va_end(args);
1002         if (!err)
1003                 sb->s_bdi = &lsi->lsi_bdi;
1004
1005         return err;
1006 }
1007 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1008
1009 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1010 {
1011         struct  lustre_profile *lprof = NULL;
1012         struct  lustre_sb_info *lsi = s2lsi(sb);
1013         struct  ll_sb_info *sbi = NULL;
1014         char    *dt = NULL, *md = NULL;
1015         char    *profilenm = get_profile_name(sb);
1016         struct config_llog_instance *cfg;
1017         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1018         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1019         char name[MAX_STRING_SIZE];
1020         int md_len = 0;
1021         int dt_len = 0;
1022         char *ptr;
1023         int len;
1024         int err;
1025
1026         ENTRY;
1027         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1028
1029         try_module_get(THIS_MODULE);
1030
1031         OBD_ALLOC_PTR(cfg);
1032         if (cfg == NULL)
1033                 GOTO(out_free_cfg, err = -ENOMEM);
1034
1035         /* client additional sb info */
1036         lsi->lsi_llsbi = sbi = ll_init_sbi();
1037         if (!sbi)
1038                 GOTO(out_free_cfg, err = -ENOMEM);
1039
1040         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1041         if (err)
1042                 GOTO(out_free_cfg, err);
1043
1044         err = super_setup_bdi_name(sb, "lustre-%p", sb);
1045         if (err)
1046                 GOTO(out_free_cfg, err);
1047
1048 #ifndef HAVE_DCACHE_LOCK
1049         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1050         sb->s_d_op = &ll_d_ops;
1051 #endif
1052         /* Get fsname */
1053         len = strlen(lsi->lsi_lmd->lmd_profile);
1054         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1055         if (ptr && (strcmp(ptr, "-client") == 0))
1056                 len -= 7;
1057
1058         /* Mount info */
1059         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1060                  lsi->lsi_lmd->lmd_profile, sb);
1061
1062         /* Call ll_debugfs_register_super() before lustre_process_log()
1063          * so that "llite.*.*" params can be processed correctly.
1064          */
1065         err = ll_debugfs_register_super(sb, name);
1066         if (err < 0) {
1067                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1068                        ll_get_fsname(sb, NULL, 0), err);
1069                 err = 0;
1070         }
1071
1072         /* Generate a string unique to this super, in case some joker tries
1073          * to mount the same fs at two mount points.
1074          * Use the address of the super itself.
1075          */
1076         cfg->cfg_instance = sb;
1077         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1078         cfg->cfg_callback = class_config_llog_handler;
1079         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1080         /* set up client obds */
1081         err = lustre_process_log(sb, profilenm, cfg);
1082         if (err < 0)
1083                 GOTO(out_debugfs, err);
1084
1085         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1086         lprof = class_get_profile(profilenm);
1087         if (lprof == NULL) {
1088                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1089                                    " read from the MGS.  Does that filesystem "
1090                                    "exist?\n", profilenm);
1091                 GOTO(out_debugfs, err = -EINVAL);
1092         }
1093         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1094                lprof->lp_md, lprof->lp_dt);
1095
1096         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1097         OBD_ALLOC(dt, dt_len);
1098         if (!dt)
1099                 GOTO(out_profile, err = -ENOMEM);
1100         snprintf(dt, dt_len - 1, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1101
1102         md_len = strlen(lprof->lp_md) + instlen + 2;
1103         OBD_ALLOC(md, md_len);
1104         if (!md)
1105                 GOTO(out_free_dt, err = -ENOMEM);
1106         snprintf(md, md_len - 1, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1107
1108         /* connections, registrations, sb setup */
1109         err = client_common_fill_super(sb, md, dt, mnt);
1110         if (err < 0)
1111                 GOTO(out_free_md, err);
1112
1113         sbi->ll_client_common_fill_super_succeeded = 1;
1114
1115 out_free_md:
1116         if (md)
1117                 OBD_FREE(md, md_len);
1118 out_free_dt:
1119         if (dt)
1120                 OBD_FREE(dt, dt_len);
1121 out_profile:
1122         if (lprof)
1123                 class_put_profile(lprof);
1124 out_debugfs:
1125         if (err < 0)
1126                 ll_debugfs_unregister_super(sb);
1127 out_free_cfg:
1128         if (cfg)
1129                 OBD_FREE_PTR(cfg);
1130
1131         if (err)
1132                 ll_put_super(sb);
1133         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1134                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1135         RETURN(err);
1136 } /* ll_fill_super */
1137
1138 void ll_put_super(struct super_block *sb)
1139 {
1140         struct config_llog_instance cfg, params_cfg;
1141         struct obd_device *obd;
1142         struct lustre_sb_info *lsi = s2lsi(sb);
1143         struct ll_sb_info *sbi = ll_s2sbi(sb);
1144         char *profilenm = get_profile_name(sb);
1145         long ccc_count;
1146         int next, force = 1, rc = 0;
1147         ENTRY;
1148
1149         if (!sbi)
1150                 GOTO(out_no_sbi, 0);
1151
1152         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1153
1154         cfg.cfg_instance = sb;
1155         lustre_end_log(sb, profilenm, &cfg);
1156
1157         params_cfg.cfg_instance = sb;
1158         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1159
1160         if (sbi->ll_md_exp) {
1161                 obd = class_exp2obd(sbi->ll_md_exp);
1162                 if (obd)
1163                         force = obd->obd_force;
1164         }
1165
1166         /* Wait for unstable pages to be committed to stable storage */
1167         if (force == 0) {
1168                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1169                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1170                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1171                         &lwi);
1172         }
1173
1174         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1175         if (force == 0 && rc != -EINTR)
1176                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1177
1178
1179         /* We need to set force before the lov_disconnect in
1180            lustre_common_put_super, since l_d cleans up osc's as well. */
1181         if (force) {
1182                 next = 0;
1183                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1184                                                      &next)) != NULL) {
1185                         obd->obd_force = force;
1186                 }
1187         }
1188
1189         if (sbi->ll_client_common_fill_super_succeeded) {
1190                 /* Only if client_common_fill_super succeeded */
1191                 client_common_put_super(sb);
1192         }
1193
1194         next = 0;
1195         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1196                 class_manual_cleanup(obd);
1197         }
1198
1199         if (sbi->ll_flags & LL_SBI_VERBOSE)
1200                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1201
1202         if (profilenm)
1203                 class_del_profile(profilenm);
1204
1205 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1206         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1207                 bdi_destroy(&lsi->lsi_bdi);
1208                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1209         }
1210 #endif
1211
1212         ll_free_sbi(sb);
1213         lsi->lsi_llsbi = NULL;
1214 out_no_sbi:
1215         lustre_common_put_super(sb);
1216
1217         cl_env_cache_purge(~0);
1218
1219         module_put(THIS_MODULE);
1220
1221         EXIT;
1222 } /* client_put_super */
1223
1224 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1225 {
1226         struct inode *inode = NULL;
1227
1228         /* NOTE: we depend on atomic igrab() -bzzz */
1229         lock_res_and_lock(lock);
1230         if (lock->l_resource->lr_lvb_inode) {
1231                 struct ll_inode_info * lli;
1232                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1233                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1234                         inode = igrab(lock->l_resource->lr_lvb_inode);
1235                 } else {
1236                         inode = lock->l_resource->lr_lvb_inode;
1237                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1238                                          D_WARNING, lock, "lr_lvb_inode %p is "
1239                                          "bogus: magic %08x",
1240                                          lock->l_resource->lr_lvb_inode,
1241                                          lli->lli_inode_magic);
1242                         inode = NULL;
1243                 }
1244         }
1245         unlock_res_and_lock(lock);
1246         return inode;
1247 }
1248
1249 void ll_dir_clear_lsm_md(struct inode *inode)
1250 {
1251         struct ll_inode_info *lli = ll_i2info(inode);
1252
1253         LASSERT(S_ISDIR(inode->i_mode));
1254
1255         if (lli->lli_lsm_md != NULL) {
1256                 lmv_free_memmd(lli->lli_lsm_md);
1257                 lli->lli_lsm_md = NULL;
1258         }
1259 }
1260
1261 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1262                                       const struct lu_fid *fid,
1263                                       struct lustre_md *md)
1264 {
1265         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1266         struct mdt_body         *body = md->body;
1267         struct inode            *inode;
1268         ino_t                   ino;
1269         ENTRY;
1270
1271         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1272         inode = iget_locked(sb, ino);
1273         if (inode == NULL) {
1274                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1275                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1276                 RETURN(ERR_PTR(-ENOENT));
1277         }
1278
1279         if (inode->i_state & I_NEW) {
1280                 struct ll_inode_info *lli = ll_i2info(inode);
1281                 struct lmv_stripe_md *lsm = md->lmv;
1282
1283                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1284                                 (body->mbo_mode & S_IFMT);
1285                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1286                          PFID(fid));
1287
1288                 LTIME_S(inode->i_mtime) = 0;
1289                 LTIME_S(inode->i_atime) = 0;
1290                 LTIME_S(inode->i_ctime) = 0;
1291                 inode->i_rdev = 0;
1292
1293 #ifdef HAVE_BACKING_DEV_INFO
1294                 /* initializing backing dev info. */
1295                 inode->i_mapping->backing_dev_info =
1296                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1297 #endif
1298                 inode->i_op = &ll_dir_inode_operations;
1299                 inode->i_fop = &ll_dir_operations;
1300                 lli->lli_fid = *fid;
1301                 ll_lli_init(lli);
1302
1303                 LASSERT(lsm != NULL);
1304                 /* master object FID */
1305                 lli->lli_pfid = body->mbo_fid1;
1306                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1307                        lli, PFID(fid), PFID(&lli->lli_pfid));
1308                 unlock_new_inode(inode);
1309         }
1310
1311         RETURN(inode);
1312 }
1313
1314 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1315 {
1316         struct lu_fid *fid;
1317         struct lmv_stripe_md *lsm = md->lmv;
1318         struct ll_inode_info *lli = ll_i2info(inode);
1319         int i;
1320
1321         LASSERT(lsm != NULL);
1322
1323         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1324                 ll_get_fsname(inode->i_sb, NULL, 0),
1325                 PFID(&lli->lli_fid));
1326         lsm_md_dump(D_INODE, lsm);
1327
1328         /* XXX sigh, this lsm_root initialization should be in
1329          * LMV layer, but it needs ll_iget right now, so we
1330          * put this here right now. */
1331         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1332                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1333                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1334                 /* Unfortunately ll_iget will call ll_update_inode,
1335                  * where the initialization of slave inode is slightly
1336                  * different, so it reset lsm_md to NULL to avoid
1337                  * initializing lsm for slave inode. */
1338                 lsm->lsm_md_oinfo[i].lmo_root =
1339                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1340                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1341                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1342
1343                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1344                         while (i-- > 0) {
1345                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1346                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1347                         }
1348                         return rc;
1349                 }
1350         }
1351
1352         lli->lli_lsm_md = lsm;
1353
1354         return 0;
1355 }
1356
1357 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1358 {
1359         struct ll_inode_info *lli = ll_i2info(inode);
1360         struct lmv_stripe_md *lsm = md->lmv;
1361         int rc = 0;
1362
1363         ENTRY;
1364
1365         LASSERT(S_ISDIR(inode->i_mode));
1366         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1367                PFID(ll_inode2fid(inode)));
1368
1369         /*
1370          * no striped information from request, lustre_md from req does not
1371          * include stripeEA, see ll_md_setattr()
1372          */
1373         if (!lsm)
1374                 RETURN(0);
1375
1376         /*
1377          * normally dir layout doesn't change, only take read lock to check
1378          * that to avoid blocking other MD operations.
1379          */
1380         if (lli->lli_lsm_md)
1381                 down_read(&lli->lli_lsm_sem);
1382         else
1383                 down_write(&lli->lli_lsm_sem);
1384
1385         /*
1386          * if dir layout mismatch, check whether version is increased, which
1387          * means layout is changed, this happens in dir migration and lfsck.
1388          */
1389         if (lli->lli_lsm_md && !lsm_md_eq(lli->lli_lsm_md, lsm)) {
1390                 if (lsm->lsm_md_layout_version <=
1391                     lli->lli_lsm_md->lsm_md_layout_version) {
1392                         CERROR("%s: "DFID" dir layout mismatch:\n",
1393                                 ll_get_fsname(inode->i_sb, NULL, 0),
1394                                 PFID(&lli->lli_fid));
1395                         lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1396                         lsm_md_dump(D_ERROR, lsm);
1397                         GOTO(unlock, rc = -EINVAL);
1398                 }
1399
1400                 /* layout changed, switch to write lock */
1401                 up_read(&lli->lli_lsm_sem);
1402                 down_write(&lli->lli_lsm_sem);
1403                 ll_dir_clear_lsm_md(inode);
1404         }
1405
1406         /* set directory layout */
1407         if (!lli->lli_lsm_md) {
1408                 struct cl_attr  *attr;
1409
1410                 rc = ll_init_lsm_md(inode, md);
1411                 up_write(&lli->lli_lsm_sem);
1412                 if (rc != 0)
1413                         RETURN(rc);
1414
1415                 /* set md->lmv to NULL, so the following free lustre_md
1416                  * will not free this lsm */
1417                 md->lmv = NULL;
1418
1419                 /*
1420                  * md_merge_attr() may take long, since lsm is already set,
1421                  * switch to read lock.
1422                  */
1423                 down_read(&lli->lli_lsm_sem);
1424
1425                 OBD_ALLOC_PTR(attr);
1426                 if (attr == NULL)
1427                         GOTO(unlock, rc = -ENOMEM);
1428
1429                 /* validate the lsm */
1430                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1431                                    ll_md_blocking_ast);
1432                 if (rc != 0) {
1433                         OBD_FREE_PTR(attr);
1434                         GOTO(unlock, rc);
1435                 }
1436
1437                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1438                         md->body->mbo_nlink = attr->cat_nlink;
1439                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1440                         md->body->mbo_size = attr->cat_size;
1441                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1442                         md->body->mbo_atime = attr->cat_atime;
1443                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1444                         md->body->mbo_ctime = attr->cat_ctime;
1445                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1446                         md->body->mbo_mtime = attr->cat_mtime;
1447
1448                 OBD_FREE_PTR(attr);
1449         }
1450 unlock:
1451         up_read(&lli->lli_lsm_sem);
1452
1453         RETURN(rc);
1454 }
1455
1456 void ll_clear_inode(struct inode *inode)
1457 {
1458         struct ll_inode_info *lli = ll_i2info(inode);
1459         struct ll_sb_info *sbi = ll_i2sbi(inode);
1460         ENTRY;
1461
1462         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1463                PFID(ll_inode2fid(inode)), inode);
1464
1465         if (S_ISDIR(inode->i_mode)) {
1466                 /* these should have been cleared in ll_file_release */
1467                 LASSERT(lli->lli_opendir_key == NULL);
1468                 LASSERT(lli->lli_sai == NULL);
1469                 LASSERT(lli->lli_opendir_pid == 0);
1470         }
1471
1472         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1473
1474         LASSERT(!lli->lli_open_fd_write_count);
1475         LASSERT(!lli->lli_open_fd_read_count);
1476         LASSERT(!lli->lli_open_fd_exec_count);
1477
1478         if (lli->lli_mds_write_och)
1479                 ll_md_real_close(inode, FMODE_WRITE);
1480         if (lli->lli_mds_exec_och)
1481                 ll_md_real_close(inode, FMODE_EXEC);
1482         if (lli->lli_mds_read_och)
1483                 ll_md_real_close(inode, FMODE_READ);
1484
1485         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1486                 OBD_FREE(lli->lli_symlink_name,
1487                          strlen(lli->lli_symlink_name) + 1);
1488                 lli->lli_symlink_name = NULL;
1489         }
1490
1491         ll_xattr_cache_destroy(inode);
1492
1493 #ifdef CONFIG_FS_POSIX_ACL
1494         forget_all_cached_acls(inode);
1495         if (lli->lli_posix_acl) {
1496                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1497                 posix_acl_release(lli->lli_posix_acl);
1498                 lli->lli_posix_acl = NULL;
1499         }
1500 #endif
1501         lli->lli_inode_magic = LLI_INODE_DEAD;
1502
1503         if (S_ISDIR(inode->i_mode))
1504                 ll_dir_clear_lsm_md(inode);
1505         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1506                 LASSERT(list_empty(&lli->lli_agl_list));
1507
1508         /*
1509          * XXX This has to be done before lsm is freed below, because
1510          * cl_object still uses inode lsm.
1511          */
1512         cl_inode_fini(inode);
1513
1514         EXIT;
1515 }
1516
1517 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1518 {
1519         struct lustre_md md;
1520         struct inode *inode = dentry->d_inode;
1521         struct ll_sb_info *sbi = ll_i2sbi(inode);
1522         struct ptlrpc_request *request = NULL;
1523         int rc, ia_valid;
1524         ENTRY;
1525
1526         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1527                                      LUSTRE_OPC_ANY, NULL);
1528         if (IS_ERR(op_data))
1529                 RETURN(PTR_ERR(op_data));
1530
1531         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1532         if (rc) {
1533                 ptlrpc_req_finished(request);
1534                 if (rc == -ENOENT) {
1535                         clear_nlink(inode);
1536                         /* Unlinked special device node? Or just a race?
1537                          * Pretend we done everything. */
1538                         if (!S_ISREG(inode->i_mode) &&
1539                             !S_ISDIR(inode->i_mode)) {
1540                                 ia_valid = op_data->op_attr.ia_valid;
1541                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1542                                 rc = simple_setattr(dentry, &op_data->op_attr);
1543                                 op_data->op_attr.ia_valid = ia_valid;
1544                         }
1545                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1546                         CERROR("md_setattr fails: rc = %d\n", rc);
1547                 }
1548                 RETURN(rc);
1549         }
1550
1551         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1552                               sbi->ll_md_exp, &md);
1553         if (rc) {
1554                 ptlrpc_req_finished(request);
1555                 RETURN(rc);
1556         }
1557
1558         ia_valid = op_data->op_attr.ia_valid;
1559         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1560          * cache is not cleared yet. */
1561         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1562         if (S_ISREG(inode->i_mode))
1563                 inode_lock(inode);
1564         rc = simple_setattr(dentry, &op_data->op_attr);
1565         if (S_ISREG(inode->i_mode))
1566                 inode_unlock(inode);
1567         op_data->op_attr.ia_valid = ia_valid;
1568
1569         rc = ll_update_inode(inode, &md);
1570         ptlrpc_req_finished(request);
1571
1572         RETURN(rc);
1573 }
1574
1575 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1576  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1577  * keep these values until such a time that objects are allocated for it.
1578  * We do the MDS operations first, as it is checking permissions for us.
1579  * We don't to the MDS RPC if there is nothing that we want to store there,
1580  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1581  * going to do an RPC anyways.
1582  *
1583  * If we are doing a truncate, we will send the mtime and ctime updates
1584  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1585  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1586  * at the same time.
1587  *
1588  * In case of HSMimport, we only set attr on MDS.
1589  */
1590 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1591                    enum op_xvalid xvalid, bool hsm_import)
1592 {
1593         struct inode *inode = dentry->d_inode;
1594         struct ll_inode_info *lli = ll_i2info(inode);
1595         struct md_op_data *op_data = NULL;
1596         int rc = 0;
1597         ENTRY;
1598
1599         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1600                "valid %x, hsm_import %d\n",
1601                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1602                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1603                hsm_import);
1604
1605         if (attr->ia_valid & ATTR_SIZE) {
1606                 /* Check new size against VFS/VM file size limit and rlimit */
1607                 rc = inode_newsize_ok(inode, attr->ia_size);
1608                 if (rc)
1609                         RETURN(rc);
1610
1611                 /* The maximum Lustre file size is variable, based on the
1612                  * OST maximum object size and number of stripes.  This
1613                  * needs another check in addition to the VFS check above. */
1614                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1615                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1616                                PFID(&lli->lli_fid), attr->ia_size,
1617                                ll_file_maxbytes(inode));
1618                         RETURN(-EFBIG);
1619                 }
1620
1621                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1622         }
1623
1624         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1625         if (attr->ia_valid & TIMES_SET_FLAGS) {
1626                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1627                     !cfs_capable(CFS_CAP_FOWNER))
1628                         RETURN(-EPERM);
1629         }
1630
1631         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1632         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1633              (attr->ia_valid & ATTR_CTIME)) {
1634                 attr->ia_ctime = current_time(inode);
1635                 xvalid |= OP_XVALID_CTIME_SET;
1636         }
1637         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1638             (attr->ia_valid & ATTR_ATIME)) {
1639                 attr->ia_atime = current_time(inode);
1640                 attr->ia_valid |= ATTR_ATIME_SET;
1641         }
1642         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1643             (attr->ia_valid & ATTR_MTIME)) {
1644                 attr->ia_mtime = current_time(inode);
1645                 attr->ia_valid |= ATTR_MTIME_SET;
1646         }
1647
1648         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1649                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1650                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1651                        (s64)ktime_get_real_seconds());
1652
1653         if (S_ISREG(inode->i_mode)) {
1654                 if (attr->ia_valid & ATTR_SIZE)
1655                         inode_dio_write_done(inode);
1656                 inode_unlock(inode);
1657         }
1658
1659         /* We always do an MDS RPC, even if we're only changing the size;
1660          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1661
1662         OBD_ALLOC_PTR(op_data);
1663         if (op_data == NULL)
1664                 GOTO(out, rc = -ENOMEM);
1665
1666         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1667                 /* If we are changing file size, file content is
1668                  * modified, flag it.
1669                  */
1670                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1671                 op_data->op_bias |= MDS_DATA_MODIFIED;
1672                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1673         }
1674
1675         if (attr->ia_valid & ATTR_FILE) {
1676                 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1677
1678                 if (fd->fd_lease_och)
1679                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1680         }
1681
1682         op_data->op_attr = *attr;
1683         op_data->op_xvalid = xvalid;
1684
1685         rc = ll_md_setattr(dentry, op_data);
1686         if (rc)
1687                 GOTO(out, rc);
1688
1689         if (!S_ISREG(inode->i_mode) || hsm_import)
1690                 GOTO(out, rc = 0);
1691
1692         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1693                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1694             xvalid & OP_XVALID_CTIME_SET) {
1695                 /* For truncate and utimes sending attributes to OSTs, setting
1696                  * mtime/atime to the past will be performed under PW [0:EOF]
1697                  * extent lock (new_size:EOF for truncate).  It may seem
1698                  * excessive to send mtime/atime updates to OSTs when not
1699                  * setting times to past, but it is necessary due to possible
1700                  * time de-synchronization between MDT inode and OST objects
1701                  */
1702                 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1703         }
1704
1705         /* If the file was restored, it needs to set dirty flag.
1706          *
1707          * We've already sent MDS_DATA_MODIFIED flag in
1708          * ll_md_setattr() for truncate. However, the MDT refuses to
1709          * set the HS_DIRTY flag on released files, so we have to set
1710          * it again if the file has been restored. Please check how
1711          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1712          *
1713          * Please notice that if the file is not released, the previous
1714          * MDS_DATA_MODIFIED has taken effect and usually
1715          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1716          * This way we can save an RPC for common open + trunc
1717          * operation. */
1718         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1719                 struct hsm_state_set hss = {
1720                         .hss_valid = HSS_SETMASK,
1721                         .hss_setmask = HS_DIRTY,
1722                 };
1723                 int rc2;
1724
1725                 rc2 = ll_hsm_state_set(inode, &hss);
1726                 /* truncate and write can happen at the same time, so that
1727                  * the file can be set modified even though the file is not
1728                  * restored from released state, and ll_hsm_state_set() is
1729                  * not applicable for the file, and rc2 < 0 is normal in this
1730                  * case. */
1731                 if (rc2 < 0)
1732                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1733                                PFID(ll_inode2fid(inode)), rc2);
1734         }
1735
1736         EXIT;
1737 out:
1738         if (op_data != NULL)
1739                 ll_finish_md_op_data(op_data);
1740
1741         if (S_ISREG(inode->i_mode)) {
1742                 inode_lock(inode);
1743                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1744                         inode_dio_wait(inode);
1745                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1746                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1747                  * inode flags, so there is a gap where S_NOSEC is not set.
1748                  * This can cause a writer to take the i_mutex unnecessarily,
1749                  * but this is safe to do and should be rare. */
1750                 inode_has_no_xattr(inode);
1751         }
1752
1753         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1754                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1755
1756         return rc;
1757 }
1758
1759 int ll_setattr(struct dentry *de, struct iattr *attr)
1760 {
1761         int mode = de->d_inode->i_mode;
1762         enum op_xvalid xvalid = 0;
1763
1764         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1765                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1766                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1767
1768         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1769                                (ATTR_SIZE|ATTR_MODE)) &&
1770             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1771              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1772               !(attr->ia_mode & S_ISGID))))
1773                 attr->ia_valid |= ATTR_FORCE;
1774
1775         if ((attr->ia_valid & ATTR_MODE) &&
1776             (mode & S_ISUID) &&
1777             !(attr->ia_mode & S_ISUID) &&
1778             !(attr->ia_valid & ATTR_KILL_SUID))
1779                 attr->ia_valid |= ATTR_KILL_SUID;
1780
1781         if ((attr->ia_valid & ATTR_MODE) &&
1782             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1783             !(attr->ia_mode & S_ISGID) &&
1784             !(attr->ia_valid & ATTR_KILL_SGID))
1785                 attr->ia_valid |= ATTR_KILL_SGID;
1786
1787         return ll_setattr_raw(de, attr, xvalid, false);
1788 }
1789
1790 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1791                        u32 flags)
1792 {
1793         struct obd_statfs obd_osfs;
1794         time64_t max_age;
1795         int rc;
1796
1797         ENTRY;
1798         max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1799
1800         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1801         if (rc) {
1802                 CERROR("md_statfs fails: rc = %d\n", rc);
1803                 RETURN(rc);
1804         }
1805
1806         osfs->os_type = LL_SUPER_MAGIC;
1807
1808         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1809                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1810
1811         if (osfs->os_state & OS_STATE_SUM)
1812                 GOTO(out, rc);
1813
1814         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1815                 flags |= OBD_STATFS_NODELAY;
1816
1817         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1818         if (rc) {
1819                 CERROR("obd_statfs fails: rc = %d\n", rc);
1820                 RETURN(rc);
1821         }
1822
1823         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1824                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1825                obd_osfs.os_files);
1826
1827         osfs->os_bsize = obd_osfs.os_bsize;
1828         osfs->os_blocks = obd_osfs.os_blocks;
1829         osfs->os_bfree = obd_osfs.os_bfree;
1830         osfs->os_bavail = obd_osfs.os_bavail;
1831
1832         /* If we don't have as many objects free on the OST as inodes
1833          * on the MDS, we reduce the total number of inodes to
1834          * compensate, so that the "inodes in use" number is correct.
1835          */
1836         if (obd_osfs.os_ffree < osfs->os_ffree) {
1837                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1838                         obd_osfs.os_ffree;
1839                 osfs->os_ffree = obd_osfs.os_ffree;
1840         }
1841
1842 out:
1843         RETURN(rc);
1844 }
1845 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1846 {
1847         struct super_block *sb = de->d_sb;
1848         struct obd_statfs osfs;
1849         __u64 fsid = huge_encode_dev(sb->s_dev);
1850         int rc;
1851
1852         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1853         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1854
1855         /* Some amount of caching on the client is allowed */
1856         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1857         if (rc)
1858                 return rc;
1859
1860         statfs_unpack(sfs, &osfs);
1861
1862         /* We need to downshift for all 32-bit kernels, because we can't
1863          * tell if the kernel is being called via sys_statfs64() or not.
1864          * Stop before overflowing f_bsize - in which case it is better
1865          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1866         if (sizeof(long) < 8) {
1867                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1868                         sfs->f_bsize <<= 1;
1869
1870                         osfs.os_blocks >>= 1;
1871                         osfs.os_bfree >>= 1;
1872                         osfs.os_bavail >>= 1;
1873                 }
1874         }
1875
1876         sfs->f_blocks = osfs.os_blocks;
1877         sfs->f_bfree = osfs.os_bfree;
1878         sfs->f_bavail = osfs.os_bavail;
1879         sfs->f_fsid.val[0] = (__u32)fsid;
1880         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1881         return 0;
1882 }
1883
1884 void ll_inode_size_lock(struct inode *inode)
1885 {
1886         struct ll_inode_info *lli;
1887
1888         LASSERT(!S_ISDIR(inode->i_mode));
1889
1890         lli = ll_i2info(inode);
1891         mutex_lock(&lli->lli_size_mutex);
1892 }
1893
1894 void ll_inode_size_unlock(struct inode *inode)
1895 {
1896         struct ll_inode_info *lli;
1897
1898         lli = ll_i2info(inode);
1899         mutex_unlock(&lli->lli_size_mutex);
1900 }
1901
1902 void ll_update_inode_flags(struct inode *inode, int ext_flags)
1903 {
1904         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
1905         if (ext_flags & LUSTRE_PROJINHERIT_FL)
1906                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1907         else
1908                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1909 }
1910
1911 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1912 {
1913         struct ll_inode_info *lli = ll_i2info(inode);
1914         struct mdt_body *body = md->body;
1915         struct ll_sb_info *sbi = ll_i2sbi(inode);
1916         int rc = 0;
1917
1918         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1919                 rc = cl_file_inode_init(inode, md);
1920                 if (rc)
1921                         return rc;
1922         }
1923
1924         if (S_ISDIR(inode->i_mode)) {
1925                 rc = ll_update_lsm_md(inode, md);
1926                 if (rc != 0)
1927                         return rc;
1928         }
1929
1930 #ifdef CONFIG_FS_POSIX_ACL
1931         if (body->mbo_valid & OBD_MD_FLACL) {
1932                 spin_lock(&lli->lli_lock);
1933                 if (lli->lli_posix_acl)
1934                         posix_acl_release(lli->lli_posix_acl);
1935                 lli->lli_posix_acl = md->posix_acl;
1936                 spin_unlock(&lli->lli_lock);
1937         }
1938 #endif
1939         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1940                                         sbi->ll_flags & LL_SBI_32BIT_API);
1941         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1942
1943         if (body->mbo_valid & OBD_MD_FLATIME) {
1944                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1945                         LTIME_S(inode->i_atime) = body->mbo_atime;
1946                 lli->lli_atime = body->mbo_atime;
1947         }
1948
1949         if (body->mbo_valid & OBD_MD_FLMTIME) {
1950                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1951                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1952                                "to %llu\n", inode->i_ino,
1953                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1954                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1955                 }
1956                 lli->lli_mtime = body->mbo_mtime;
1957         }
1958
1959         if (body->mbo_valid & OBD_MD_FLCTIME) {
1960                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1961                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1962                 lli->lli_ctime = body->mbo_ctime;
1963         }
1964
1965         /* Clear i_flags to remove S_NOSEC before permissions are updated */
1966         if (body->mbo_valid & OBD_MD_FLFLAGS)
1967                 ll_update_inode_flags(inode, body->mbo_flags);
1968         if (body->mbo_valid & OBD_MD_FLMODE)
1969                 inode->i_mode = (inode->i_mode & S_IFMT) |
1970                                 (body->mbo_mode & ~S_IFMT);
1971
1972         if (body->mbo_valid & OBD_MD_FLTYPE)
1973                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1974                                 (body->mbo_mode & S_IFMT);
1975
1976         LASSERT(inode->i_mode != 0);
1977         if (S_ISREG(inode->i_mode))
1978                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1979                                        LL_MAX_BLKSIZE_BITS);
1980         else
1981                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1982
1983         if (body->mbo_valid & OBD_MD_FLUID)
1984                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1985         if (body->mbo_valid & OBD_MD_FLGID)
1986                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1987         if (body->mbo_valid & OBD_MD_FLPROJID)
1988                 lli->lli_projid = body->mbo_projid;
1989         if (body->mbo_valid & OBD_MD_FLNLINK)
1990                 set_nlink(inode, body->mbo_nlink);
1991         if (body->mbo_valid & OBD_MD_FLRDEV)
1992                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1993
1994         if (body->mbo_valid & OBD_MD_FLID) {
1995                 /* FID shouldn't be changed! */
1996                 if (fid_is_sane(&lli->lli_fid)) {
1997                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1998                                  "Trying to change FID "DFID
1999                                  " to the "DFID", inode "DFID"(%p)\n",
2000                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2001                                  PFID(ll_inode2fid(inode)), inode);
2002                 } else {
2003                         lli->lli_fid = body->mbo_fid1;
2004                 }
2005         }
2006
2007         LASSERT(fid_seq(&lli->lli_fid) != 0);
2008
2009         if (body->mbo_valid & OBD_MD_FLSIZE) {
2010                 i_size_write(inode, body->mbo_size);
2011
2012                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2013                        PFID(ll_inode2fid(inode)),
2014                        (unsigned long long)body->mbo_size);
2015
2016                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2017                         inode->i_blocks = body->mbo_blocks;
2018         }
2019
2020         if (body->mbo_valid & OBD_MD_TSTATE) {
2021                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2022                  * clear it when done to ensure to start again
2023                  * glimpsing updated attrs
2024                  */
2025                 if (body->mbo_t_state & MS_RESTORE)
2026                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2027                 else
2028                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2029         }
2030
2031         return 0;
2032 }
2033
2034 int ll_read_inode2(struct inode *inode, void *opaque)
2035 {
2036         struct lustre_md *md = opaque;
2037         struct ll_inode_info *lli = ll_i2info(inode);
2038         int     rc;
2039         ENTRY;
2040
2041         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2042                PFID(&lli->lli_fid), inode);
2043
2044         /* Core attributes from the MDS first.  This is a new inode, and
2045          * the VFS doesn't zero times in the core inode so we have to do
2046          * it ourselves.  They will be overwritten by either MDS or OST
2047          * attributes - we just need to make sure they aren't newer. */
2048         LTIME_S(inode->i_mtime) = 0;
2049         LTIME_S(inode->i_atime) = 0;
2050         LTIME_S(inode->i_ctime) = 0;
2051         inode->i_rdev = 0;
2052         rc = ll_update_inode(inode, md);
2053         if (rc != 0)
2054                 RETURN(rc);
2055
2056         /* OIDEBUG(inode); */
2057
2058 #ifdef HAVE_BACKING_DEV_INFO
2059         /* initializing backing dev info. */
2060         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2061 #endif
2062         if (S_ISREG(inode->i_mode)) {
2063                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2064                 inode->i_op = &ll_file_inode_operations;
2065                 inode->i_fop = sbi->ll_fop;
2066                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2067                 EXIT;
2068         } else if (S_ISDIR(inode->i_mode)) {
2069                 inode->i_op = &ll_dir_inode_operations;
2070                 inode->i_fop = &ll_dir_operations;
2071                 EXIT;
2072         } else if (S_ISLNK(inode->i_mode)) {
2073                 inode->i_op = &ll_fast_symlink_inode_operations;
2074                 EXIT;
2075         } else {
2076                 inode->i_op = &ll_special_inode_operations;
2077
2078                 init_special_inode(inode, inode->i_mode,
2079                                    inode->i_rdev);
2080
2081                 EXIT;
2082         }
2083
2084         return 0;
2085 }
2086
2087 void ll_delete_inode(struct inode *inode)
2088 {
2089         struct ll_inode_info *lli = ll_i2info(inode);
2090         ENTRY;
2091
2092         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2093                 /* It is last chance to write out dirty pages,
2094                  * otherwise we may lose data while umount */
2095                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2096
2097         truncate_inode_pages_final(&inode->i_data);
2098
2099         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2100                  "see https://jira.whamcloud.com/browse/LU-118\n",
2101                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2102
2103 #ifdef HAVE_SBOPS_EVICT_INODE
2104         ll_clear_inode(inode);
2105 #endif
2106         clear_inode(inode);
2107
2108         EXIT;
2109 }
2110
2111 int ll_iocontrol(struct inode *inode, struct file *file,
2112                  unsigned int cmd, unsigned long arg)
2113 {
2114         struct ll_sb_info *sbi = ll_i2sbi(inode);
2115         struct ptlrpc_request *req = NULL;
2116         int rc, flags = 0;
2117         ENTRY;
2118
2119         switch (cmd) {
2120         case FS_IOC_GETFLAGS: {
2121                 struct mdt_body *body;
2122                 struct md_op_data *op_data;
2123
2124                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2125                                              0, 0, LUSTRE_OPC_ANY,
2126                                              NULL);
2127                 if (IS_ERR(op_data))
2128                         RETURN(PTR_ERR(op_data));
2129
2130                 op_data->op_valid = OBD_MD_FLFLAGS;
2131                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2132                 ll_finish_md_op_data(op_data);
2133                 if (rc) {
2134                         CERROR("%s: failure inode "DFID": rc = %d\n",
2135                                sbi->ll_md_exp->exp_obd->obd_name,
2136                                PFID(ll_inode2fid(inode)), rc);
2137                         RETURN(-abs(rc));
2138                 }
2139
2140                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2141
2142                 flags = body->mbo_flags;
2143
2144                 ptlrpc_req_finished(req);
2145
2146                 RETURN(put_user(flags, (int __user *)arg));
2147         }
2148         case FS_IOC_SETFLAGS: {
2149                 struct iattr *attr;
2150                 struct md_op_data *op_data;
2151                 struct cl_object *obj;
2152                 struct fsxattr fa = { 0 };
2153
2154                 if (get_user(flags, (int __user *)arg))
2155                         RETURN(-EFAULT);
2156
2157                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2158                 if (flags & LUSTRE_PROJINHERIT_FL)
2159                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2160
2161                 rc = ll_ioctl_check_project(inode, &fa);
2162                 if (rc)
2163                         RETURN(rc);
2164
2165                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2166                                              LUSTRE_OPC_ANY, NULL);
2167                 if (IS_ERR(op_data))
2168                         RETURN(PTR_ERR(op_data));
2169
2170                 op_data->op_attr_flags = flags;
2171                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2172                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2173                 ll_finish_md_op_data(op_data);
2174                 ptlrpc_req_finished(req);
2175                 if (rc)
2176                         RETURN(rc);
2177
2178                 ll_update_inode_flags(inode, flags);
2179
2180                 obj = ll_i2info(inode)->lli_clob;
2181                 if (obj == NULL)
2182                         RETURN(0);
2183
2184                 OBD_ALLOC_PTR(attr);
2185                 if (attr == NULL)
2186                         RETURN(-ENOMEM);
2187
2188                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2189
2190                 OBD_FREE_PTR(attr);
2191                 RETURN(rc);
2192         }
2193         default:
2194                 RETURN(-ENOSYS);
2195         }
2196
2197         RETURN(0);
2198 }
2199
2200 int ll_flush_ctx(struct inode *inode)
2201 {
2202         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2203
2204         CDEBUG(D_SEC, "flush context for user %d\n",
2205                from_kuid(&init_user_ns, current_uid()));
2206
2207         obd_set_info_async(NULL, sbi->ll_md_exp,
2208                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2209                            0, NULL, NULL);
2210         obd_set_info_async(NULL, sbi->ll_dt_exp,
2211                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2212                            0, NULL, NULL);
2213         return 0;
2214 }
2215
2216 /* umount -f client means force down, don't save state */
2217 void ll_umount_begin(struct super_block *sb)
2218 {
2219         struct ll_sb_info *sbi = ll_s2sbi(sb);
2220         struct obd_device *obd;
2221         struct obd_ioctl_data *ioc_data;
2222         struct l_wait_info lwi;
2223         wait_queue_head_t waitq;
2224         ENTRY;
2225
2226         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2227                sb->s_count, atomic_read(&sb->s_active));
2228
2229         obd = class_exp2obd(sbi->ll_md_exp);
2230         if (obd == NULL) {
2231                 CERROR("Invalid MDC connection handle %#llx\n",
2232                        sbi->ll_md_exp->exp_handle.h_cookie);
2233                 EXIT;
2234                 return;
2235         }
2236         obd->obd_force = 1;
2237
2238         obd = class_exp2obd(sbi->ll_dt_exp);
2239         if (obd == NULL) {
2240                 CERROR("Invalid LOV connection handle %#llx\n",
2241                        sbi->ll_dt_exp->exp_handle.h_cookie);
2242                 EXIT;
2243                 return;
2244         }
2245         obd->obd_force = 1;
2246
2247         OBD_ALLOC_PTR(ioc_data);
2248         if (ioc_data) {
2249                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2250                               sizeof *ioc_data, ioc_data, NULL);
2251
2252                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2253                               sizeof *ioc_data, ioc_data, NULL);
2254
2255                 OBD_FREE_PTR(ioc_data);
2256         }
2257
2258         /* Really, we'd like to wait until there are no requests outstanding,
2259          * and then continue.  For now, we just periodically checking for vfs
2260          * to decrement mnt_cnt and hope to finish it within 10sec.
2261          */
2262         init_waitqueue_head(&waitq);
2263         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2264                                    cfs_time_seconds(1), NULL, NULL);
2265         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2266
2267         EXIT;
2268 }
2269
2270 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2271 {
2272         struct ll_sb_info *sbi = ll_s2sbi(sb);
2273         char *profilenm = get_profile_name(sb);
2274         int err;
2275         __u32 read_only;
2276
2277         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2278                 read_only = *flags & MS_RDONLY;
2279                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2280                                          sizeof(KEY_READ_ONLY),
2281                                          KEY_READ_ONLY, sizeof(read_only),
2282                                          &read_only, NULL);
2283                 if (err) {
2284                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2285                                       profilenm, read_only ?
2286                                       "read-only" : "read-write", err);
2287                         return err;
2288                 }
2289
2290                 if (read_only)
2291                         sb->s_flags |= MS_RDONLY;
2292                 else
2293                         sb->s_flags &= ~MS_RDONLY;
2294
2295                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2296                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2297                                       read_only ?  "read-only" : "read-write");
2298         }
2299         return 0;
2300 }
2301
2302 /**
2303  * Cleanup the open handle that is cached on MDT-side.
2304  *
2305  * For open case, the client side open handling thread may hit error
2306  * after the MDT grant the open. Under such case, the client should
2307  * send close RPC to the MDT as cleanup; otherwise, the open handle
2308  * on the MDT will be leaked there until the client umount or evicted.
2309  *
2310  * In further, if someone unlinked the file, because the open handle
2311  * holds the reference on such file/object, then it will block the
2312  * subsequent threads that want to locate such object via FID.
2313  *
2314  * \param[in] sb        super block for this file-system
2315  * \param[in] open_req  pointer to the original open request
2316  */
2317 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2318 {
2319         struct mdt_body                 *body;
2320         struct md_op_data               *op_data;
2321         struct ptlrpc_request           *close_req = NULL;
2322         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2323         ENTRY;
2324
2325         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2326         OBD_ALLOC_PTR(op_data);
2327         if (op_data == NULL) {
2328                 CWARN("%s: cannot allocate op_data to release open handle for "
2329                       DFID"\n",
2330                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2331
2332                 RETURN_EXIT;
2333         }
2334
2335         op_data->op_fid1 = body->mbo_fid1;
2336         op_data->op_open_handle = body->mbo_open_handle;
2337         op_data->op_mod_time = ktime_get_real_seconds();
2338         md_close(exp, op_data, NULL, &close_req);
2339         ptlrpc_req_finished(close_req);
2340         ll_finish_md_op_data(op_data);
2341
2342         EXIT;
2343 }
2344
2345 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2346                   struct super_block *sb, struct lookup_intent *it)
2347 {
2348         struct ll_sb_info *sbi = NULL;
2349         struct lustre_md md = { NULL };
2350         int rc;
2351         ENTRY;
2352
2353         LASSERT(*inode || sb);
2354         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2355         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2356                               sbi->ll_md_exp, &md);
2357         if (rc != 0)
2358                 GOTO(cleanup, rc);
2359
2360         if (*inode) {
2361                 rc = ll_update_inode(*inode, &md);
2362                 if (rc != 0)
2363                         GOTO(out, rc);
2364         } else {
2365                 LASSERT(sb != NULL);
2366
2367                 /*
2368                  * At this point server returns to client's same fid as client
2369                  * generated for creating. So using ->fid1 is okay here.
2370                  */
2371                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2372                         CERROR("%s: Fid is insane "DFID"\n",
2373                                 ll_get_fsname(sb, NULL, 0),
2374                                 PFID(&md.body->mbo_fid1));
2375                         GOTO(out, rc = -EINVAL);
2376                 }
2377
2378                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2379                                              sbi->ll_flags & LL_SBI_32BIT_API),
2380                                  &md);
2381                 if (IS_ERR(*inode)) {
2382 #ifdef CONFIG_FS_POSIX_ACL
2383                         if (md.posix_acl) {
2384                                 posix_acl_release(md.posix_acl);
2385                                 md.posix_acl = NULL;
2386                         }
2387 #endif
2388                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2389                         *inode = NULL;
2390                         CERROR("new_inode -fatal: rc %d\n", rc);
2391                         GOTO(out, rc);
2392                 }
2393         }
2394
2395         /* Handling piggyback layout lock.
2396          * Layout lock can be piggybacked by getattr and open request.
2397          * The lsm can be applied to inode only if it comes with a layout lock
2398          * otherwise correct layout may be overwritten, for example:
2399          * 1. proc1: mdt returns a lsm but not granting layout
2400          * 2. layout was changed by another client
2401          * 3. proc2: refresh layout and layout lock granted
2402          * 4. proc1: to apply a stale layout */
2403         if (it != NULL && it->it_lock_mode != 0) {
2404                 struct lustre_handle lockh;
2405                 struct ldlm_lock *lock;
2406
2407                 lockh.cookie = it->it_lock_handle;
2408                 lock = ldlm_handle2lock(&lockh);
2409                 LASSERT(lock != NULL);
2410                 if (ldlm_has_layout(lock)) {
2411                         struct cl_object_conf conf;
2412
2413                         memset(&conf, 0, sizeof(conf));
2414                         conf.coc_opc = OBJECT_CONF_SET;
2415                         conf.coc_inode = *inode;
2416                         conf.coc_lock = lock;
2417                         conf.u.coc_layout = md.layout;
2418                         (void)ll_layout_conf(*inode, &conf);
2419                 }
2420                 LDLM_LOCK_PUT(lock);
2421         }
2422
2423         GOTO(out, rc = 0);
2424
2425 out:
2426         md_free_lustre_md(sbi->ll_md_exp, &md);
2427
2428 cleanup:
2429         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2430                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2431
2432         return rc;
2433 }
2434
2435 int ll_obd_statfs(struct inode *inode, void __user *arg)
2436 {
2437         struct ll_sb_info *sbi = NULL;
2438         struct obd_export *exp;
2439         char *buf = NULL;
2440         struct obd_ioctl_data *data = NULL;
2441         __u32 type;
2442         int len = 0, rc;
2443
2444         if (!inode || !(sbi = ll_i2sbi(inode)))
2445                 GOTO(out_statfs, rc = -EINVAL);
2446
2447         rc = obd_ioctl_getdata(&buf, &len, arg);
2448         if (rc)
2449                 GOTO(out_statfs, rc);
2450
2451         data = (void*)buf;
2452         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2453             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2454                 GOTO(out_statfs, rc = -EINVAL);
2455
2456         if (data->ioc_inllen1 != sizeof(__u32) ||
2457             data->ioc_inllen2 != sizeof(__u32) ||
2458             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2459             data->ioc_plen2 != sizeof(struct obd_uuid))
2460                 GOTO(out_statfs, rc = -EINVAL);
2461
2462         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2463         if (type & LL_STATFS_LMV)
2464                 exp = sbi->ll_md_exp;
2465         else if (type & LL_STATFS_LOV)
2466                 exp = sbi->ll_dt_exp;
2467         else
2468                 GOTO(out_statfs, rc = -ENODEV);
2469
2470         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2471         if (rc)
2472                 GOTO(out_statfs, rc);
2473 out_statfs:
2474         OBD_FREE_LARGE(buf, len);
2475         return rc;
2476 }
2477
2478 /*
2479  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2480  * be called early to avoid deadlock.
2481  */
2482 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2483 {
2484         if (op_data->op_mea2_sem) {
2485                 up_read(op_data->op_mea2_sem);
2486                 op_data->op_mea2_sem = NULL;
2487         }
2488
2489         if (op_data->op_mea1_sem) {
2490                 up_read(op_data->op_mea1_sem);
2491                 op_data->op_mea1_sem = NULL;
2492         }
2493 }
2494
2495 /* this function prepares md_op_data hint for passing it down to MD stack. */
2496 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2497                                       struct inode *i1, struct inode *i2,
2498                                       const char *name, size_t namelen,
2499                                       __u32 mode, __u32 opc, void *data)
2500 {
2501         LASSERT(i1 != NULL);
2502
2503         if (name == NULL) {
2504                 /* Do not reuse namelen for something else. */
2505                 if (namelen != 0)
2506                         return ERR_PTR(-EINVAL);
2507         } else {
2508                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2509                         return ERR_PTR(-ENAMETOOLONG);
2510
2511                 if (!lu_name_is_valid_2(name, namelen))
2512                         return ERR_PTR(-EINVAL);
2513         }
2514
2515         if (op_data == NULL)
2516                 OBD_ALLOC_PTR(op_data);
2517
2518         if (op_data == NULL)
2519                 return ERR_PTR(-ENOMEM);
2520
2521         ll_i2gids(op_data->op_suppgids, i1, i2);
2522         op_data->op_fid1 = *ll_inode2fid(i1);
2523         op_data->op_default_stripe_offset = -1;
2524
2525         if (S_ISDIR(i1->i_mode)) {
2526                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2527                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2528                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2529                 if (opc == LUSTRE_OPC_MKDIR)
2530                         op_data->op_default_stripe_offset =
2531                                    ll_i2info(i1)->lli_def_stripe_offset;
2532         }
2533
2534         if (i2) {
2535                 op_data->op_fid2 = *ll_inode2fid(i2);
2536                 if (S_ISDIR(i2->i_mode)) {
2537                         if (i2 != i1) {
2538                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2539                                 op_data->op_mea2_sem =
2540                                                 &ll_i2info(i2)->lli_lsm_sem;
2541                         }
2542                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2543                 }
2544         } else {
2545                 fid_zero(&op_data->op_fid2);
2546         }
2547
2548         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2549                 op_data->op_cli_flags |= CLI_HASH64;
2550
2551         if (ll_need_32bit_api(ll_i2sbi(i1)))
2552                 op_data->op_cli_flags |= CLI_API32;
2553
2554         op_data->op_name = name;
2555         op_data->op_namelen = namelen;
2556         op_data->op_mode = mode;
2557         op_data->op_mod_time = ktime_get_real_seconds();
2558         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2559         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2560         op_data->op_cap = cfs_curproc_cap_pack();
2561         op_data->op_mds = 0;
2562         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2563              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2564                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2565         }
2566         op_data->op_data = data;
2567
2568         return op_data;
2569 }
2570
2571 void ll_finish_md_op_data(struct md_op_data *op_data)
2572 {
2573         ll_unlock_md_op_lsm(op_data);
2574         security_release_secctx(op_data->op_file_secctx,
2575                                 op_data->op_file_secctx_size);
2576         OBD_FREE_PTR(op_data);
2577 }
2578
2579 #ifdef HAVE_SUPEROPS_USE_DENTRY
2580 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2581 #else
2582 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2583 #endif
2584 {
2585         struct ll_sb_info *sbi;
2586
2587 #ifdef HAVE_SUPEROPS_USE_DENTRY
2588         LASSERT((seq != NULL) && (dentry != NULL));
2589         sbi = ll_s2sbi(dentry->d_sb);
2590 #else
2591         LASSERT((seq != NULL) && (vfs != NULL));
2592         sbi = ll_s2sbi(vfs->mnt_sb);
2593 #endif
2594
2595         if (sbi->ll_flags & LL_SBI_NOLCK)
2596                 seq_puts(seq, ",nolock");
2597
2598         if (sbi->ll_flags & LL_SBI_FLOCK)
2599                 seq_puts(seq, ",flock");
2600
2601         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2602                 seq_puts(seq, ",localflock");
2603
2604         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2605                 seq_puts(seq, ",user_xattr");
2606
2607         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2608                 seq_puts(seq, ",lazystatfs");
2609
2610         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2611                 seq_puts(seq, ",user_fid2path");
2612
2613         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2614                 seq_puts(seq, ",always_ping");
2615
2616         RETURN(0);
2617 }
2618
2619 /**
2620  * Get obd name by cmd, and copy out to user space
2621  */
2622 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2623 {
2624         struct ll_sb_info *sbi = ll_i2sbi(inode);
2625         struct obd_device *obd;
2626         ENTRY;
2627
2628         if (cmd == OBD_IOC_GETDTNAME)
2629                 obd = class_exp2obd(sbi->ll_dt_exp);
2630         else if (cmd == OBD_IOC_GETMDNAME)
2631                 obd = class_exp2obd(sbi->ll_md_exp);
2632         else
2633                 RETURN(-EINVAL);
2634
2635         if (!obd)
2636                 RETURN(-ENOENT);
2637
2638         if (copy_to_user((void __user *)arg, obd->obd_name,
2639                          strlen(obd->obd_name) + 1))
2640                 RETURN(-EFAULT);
2641
2642         RETURN(0);
2643 }
2644
2645 /**
2646  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2647  * fsname will be returned in this buffer; otherwise, a static buffer will be
2648  * used to store the fsname and returned to caller.
2649  */
2650 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2651 {
2652         static char fsname_static[MTI_NAME_MAXLEN];
2653         struct lustre_sb_info *lsi = s2lsi(sb);
2654         char *ptr;
2655         int len;
2656
2657         if (buf == NULL) {
2658                 /* this means the caller wants to use static buffer
2659                  * and it doesn't care about race. Usually this is
2660                  * in error reporting path */
2661                 buf = fsname_static;
2662                 buflen = sizeof(fsname_static);
2663         }
2664
2665         len = strlen(lsi->lsi_lmd->lmd_profile);
2666         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2667         if (ptr && (strcmp(ptr, "-client") == 0))
2668                 len -= 7;
2669
2670         if (unlikely(len >= buflen))
2671                 len = buflen - 1;
2672         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2673         buf[len] = '\0';
2674
2675         return buf;
2676 }
2677
2678 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2679 {
2680         char *path = NULL;
2681
2682         struct path p;
2683
2684         p.dentry = dentry;
2685         p.mnt = current->fs->root.mnt;
2686         path_get(&p);
2687         path = d_path(&p, buf, bufsize);
2688         path_put(&p);
2689         return path;
2690 }
2691
2692 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2693 {
2694         char *buf, *path = NULL;
2695         struct dentry *dentry = NULL;
2696         struct inode *inode = page->mapping->host;
2697
2698         /* this can be called inside spin lock so use GFP_ATOMIC. */
2699         buf = (char *)__get_free_page(GFP_ATOMIC);
2700         if (buf != NULL) {
2701                 dentry = d_find_alias(page->mapping->host);
2702                 if (dentry != NULL)
2703                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2704         }
2705
2706         CDEBUG(D_WARNING,
2707                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2708                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2709                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2710                PFID(ll_inode2fid(inode)),
2711                (path && !IS_ERR(path)) ? path : "", ioret);
2712
2713         if (dentry != NULL)
2714                 dput(dentry);
2715
2716         if (buf != NULL)
2717                 free_page((unsigned long)buf);
2718 }
2719
2720 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2721                         struct lov_user_md **kbuf)
2722 {
2723         struct lov_user_md      lum;
2724         ssize_t                 lum_size;
2725         ENTRY;
2726
2727         if (copy_from_user(&lum, md, sizeof(lum)))
2728                 RETURN(-EFAULT);
2729
2730         lum_size = ll_lov_user_md_size(&lum);
2731         if (lum_size < 0)
2732                 RETURN(lum_size);
2733
2734         OBD_ALLOC(*kbuf, lum_size);
2735         if (*kbuf == NULL)
2736                 RETURN(-ENOMEM);
2737
2738         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2739                 OBD_FREE(*kbuf, lum_size);
2740                 RETURN(-EFAULT);
2741         }
2742
2743         RETURN(lum_size);
2744 }
2745
2746 /*
2747  * Compute llite root squash state after a change of root squash
2748  * configuration setting or add/remove of a lnet nid
2749  */
2750 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2751 {
2752         struct root_squash_info *squash = &sbi->ll_squash;
2753         int i;
2754         bool matched;
2755         struct lnet_process_id id;
2756
2757         /* Update norootsquash flag */
2758         down_write(&squash->rsi_sem);
2759         if (list_empty(&squash->rsi_nosquash_nids))
2760                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2761         else {
2762                 /* Do not apply root squash as soon as one of our NIDs is
2763                  * in the nosquash_nids list */
2764                 matched = false;
2765                 i = 0;
2766                 while (LNetGetId(i++, &id) != -ENOENT) {
2767                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2768                                 continue;
2769                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2770                                 matched = true;
2771                                 break;
2772                         }
2773                 }
2774                 if (matched)
2775                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2776                 else
2777                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2778         }
2779         up_write(&squash->rsi_sem);
2780 }
2781
2782 /**
2783  * Parse linkea content to extract information about a given hardlink
2784  *
2785  * \param[in]   ldata      - Initialized linkea data
2786  * \param[in]   linkno     - Link identifier
2787  * \param[out]  parent_fid - The entry's parent FID
2788  * \param[out]  ln         - Entry name destination buffer
2789  *
2790  * \retval 0 on success
2791  * \retval Appropriate negative error code on failure
2792  */
2793 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2794                             struct lu_fid *parent_fid, struct lu_name *ln)
2795 {
2796         unsigned int    idx;
2797         int             rc;
2798         ENTRY;
2799
2800         rc = linkea_init_with_rec(ldata);
2801         if (rc < 0)
2802                 RETURN(rc);
2803
2804         if (linkno >= ldata->ld_leh->leh_reccount)
2805                 /* beyond last link */
2806                 RETURN(-ENODATA);
2807
2808         linkea_first_entry(ldata);
2809         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2810                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2811                                     parent_fid);
2812                 if (idx == linkno)
2813                         break;
2814
2815                 linkea_next_entry(ldata);
2816         }
2817
2818         if (idx < linkno)
2819                 RETURN(-ENODATA);
2820
2821         RETURN(0);
2822 }
2823
2824 /**
2825  * Get parent FID and name of an identified link. Operation is performed for
2826  * a given link number, letting the caller iterate over linkno to list one or
2827  * all links of an entry.
2828  *
2829  * \param[in]     file - File descriptor against which to perform the operation
2830  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2831  *                       on and the available size. It is eventually filled with
2832  *                       the requested information or left untouched on error
2833  *
2834  * \retval - 0 on success
2835  * \retval - Appropriate negative error code on failure
2836  */
2837 int ll_getparent(struct file *file, struct getparent __user *arg)
2838 {
2839         struct inode            *inode = file_inode(file);
2840         struct linkea_data      *ldata;
2841         struct lu_buf            buf = LU_BUF_NULL;
2842         struct lu_name           ln;
2843         struct lu_fid            parent_fid;
2844         __u32                    linkno;
2845         __u32                    name_size;
2846         int                      rc;
2847
2848         ENTRY;
2849
2850         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2851             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2852                 RETURN(-EPERM);
2853
2854         if (get_user(name_size, &arg->gp_name_size))
2855                 RETURN(-EFAULT);
2856
2857         if (get_user(linkno, &arg->gp_linkno))
2858                 RETURN(-EFAULT);
2859
2860         if (name_size > PATH_MAX)
2861                 RETURN(-EINVAL);
2862
2863         OBD_ALLOC(ldata, sizeof(*ldata));
2864         if (ldata == NULL)
2865                 RETURN(-ENOMEM);
2866
2867         rc = linkea_data_new(ldata, &buf);
2868         if (rc < 0)
2869                 GOTO(ldata_free, rc);
2870
2871 #ifdef HAVE_XATTR_HANDLER_FLAGS
2872         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2873                            buf.lb_len, OBD_MD_FLXATTR);
2874 #else
2875         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2876                          buf.lb_len);
2877 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2878         if (rc < 0)
2879                 GOTO(lb_free, rc);
2880
2881         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2882         if (rc < 0)
2883                 GOTO(lb_free, rc);
2884
2885         if (ln.ln_namelen >= name_size)
2886                 GOTO(lb_free, rc = -EOVERFLOW);
2887
2888         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2889                 GOTO(lb_free, rc = -EFAULT);
2890
2891         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2892                 GOTO(lb_free, rc = -EFAULT);
2893
2894         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2895                 GOTO(lb_free, rc = -EFAULT);
2896
2897 lb_free:
2898         lu_buf_free(&buf);
2899 ldata_free:
2900         OBD_FREE(ldata, sizeof(*ldata));
2901
2902         RETURN(rc);
2903 }