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/random.h>
  41 #include <linux/statfs.h>
  42 #include <linux/time.h>
  43 #include <linux/types.h>
  44 #include <libcfs/linux/linux-uuid.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47 #include <linux/user_namespace.h>
  48 #ifdef HAVE_UIDGID_HEADER
  49 # include <linux/uidgid.h>
  50 #endif
  51 #include <linux/security.h>
  52
  53 #include <uapi/linux/lustre/lustre_ioctl.h>
  54 #include <lustre_ha.h>
  55 #include <lustre_dlm.h>
  56 #include <lprocfs_status.h>
  57 #include <lustre_disk.h>
  58 #include <uapi/linux/lustre/lustre_param.h>
  59 #include <lustre_log.h>
  60 #include <cl_object.h>
  61 #include <obd_cksum.h>
  62 #include "llite_internal.h"
  63
  64 struct kmem_cache *ll_file_data_slab;
  65
  66 #ifndef log2
  67 #define log2(n) ffz(~(n))
  68 #endif
  69
  70 static struct ll_sb_info *ll_init_sbi(void)
  71 {
  72         struct ll_sb_info *sbi = NULL;
  73         unsigned long pages;
  74         unsigned long lru_page_max;
  75         struct sysinfo si;
  76         int i;
  77         ENTRY;
  78
  79         OBD_ALLOC_PTR(sbi);
  80         if (sbi == NULL)
  81                 RETURN(NULL);
  82
  83         spin_lock_init(&sbi->ll_lock);
  84         mutex_init(&sbi->ll_lco.lco_lock);
  85         spin_lock_init(&sbi->ll_pp_extent_lock);
  86         spin_lock_init(&sbi->ll_process_lock);
  87         sbi->ll_rw_stats_on = 0;
  88
  89         si_meminfo(&si);
  90         pages = si.totalram - si.totalhigh;
  91         lru_page_max = pages / 2;
  92
  93         /* initialize ll_cache data */
  94         sbi->ll_cache = cl_cache_init(lru_page_max);
  95         if (sbi->ll_cache == NULL) {
  96                 OBD_FREE(sbi, sizeof(*sbi));
  97                 RETURN(NULL);
  98         }
  99
 100         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 101                                            SBI_DEFAULT_READAHEAD_MAX);
 102         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 103         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 104
 105         sbi->ll_flags |= LL_SBI_VERBOSE;
 106 #ifdef ENABLE_CHECKSUM
 107         sbi->ll_flags |= LL_SBI_CHECKSUM;
 108 #endif
 109 #ifdef ENABLE_FLOCK
 110         sbi->ll_flags |= LL_SBI_FLOCK;
 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         /* Per-filesystem file heat */
 143         sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
 144         sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
 145         RETURN(sbi);
 146 }
 147
 148 static void ll_free_sbi(struct super_block *sb)
 149 {
 150         struct ll_sb_info *sbi = ll_s2sbi(sb);
 151         ENTRY;
 152
 153         if (sbi != NULL) {
 154                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 155                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 156                 if (sbi->ll_cache != NULL) {
 157                         cl_cache_decref(sbi->ll_cache);
 158                         sbi->ll_cache = NULL;
 159                 }
 160                 OBD_FREE(sbi, sizeof(*sbi));
 161         }
 162         EXIT;
 163 }
 164
 165 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 166                                     struct vfsmount *mnt)
 167 {
 168         struct inode *root = NULL;
 169         struct ll_sb_info *sbi = ll_s2sbi(sb);
 170         struct obd_statfs *osfs = NULL;
 171         struct ptlrpc_request *request = NULL;
 172         struct obd_connect_data *data = NULL;
 173         struct obd_uuid *uuid;
 174         struct md_op_data *op_data;
 175         struct lustre_md lmd;
 176         u64 valid;
 177         int size, err, checksum;
 178
 179         ENTRY;
 180         sbi->ll_md_obd = class_name2obd(md);
 181         if (!sbi->ll_md_obd) {
 182                 CERROR("MD %s: not setup or attached\n", md);
 183                 RETURN(-EINVAL);
 184         }
 185
 186         OBD_ALLOC_PTR(data);
 187         if (data == NULL)
 188                 RETURN(-ENOMEM);
 189
 190         OBD_ALLOC_PTR(osfs);
 191         if (osfs == NULL) {
 192                 OBD_FREE_PTR(data);
 193                 RETURN(-ENOMEM);
 194         }
 195
 196         /* pass client page size via ocd_grant_blkbits, the server should report
 197          * back its backend blocksize for grant calculation purpose */
 198         data->ocd_grant_blkbits = PAGE_SHIFT;
 199
 200         /* indicate MDT features supported by this client */
 201         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 202                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 203                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 204                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 205                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 206                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 207                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 208                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 209                                   OBD_CONNECT_64BITHASH |
 210                                   OBD_CONNECT_EINPROGRESS |
 211                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 212                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 213                                   OBD_CONNECT_MAX_EASIZE |
 214                                   OBD_CONNECT_FLOCK_DEAD |
 215                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 216                                   OBD_CONNECT_OPEN_BY_FID |
 217                                   OBD_CONNECT_DIR_STRIPE |
 218                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 219                                   OBD_CONNECT_SUBTREE |
 220                                   OBD_CONNECT_MULTIMODRPCS |
 221                                   OBD_CONNECT_GRANT_PARAM |
 222                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 223
 224         data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
 225                                    OBD_CONNECT2_SUM_STATFS |
 226                                    OBD_CONNECT2_FLR |
 227                                    OBD_CONNECT2_LOCK_CONVERT |
 228                                    OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 229                                    OBD_CONNECT2_LSOM |
 230                                    OBD_CONNECT2_ASYNC_DISCARD;
 231
 232 #ifdef HAVE_LRU_RESIZE_SUPPORT
 233         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 234                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 235 #endif
 236 #ifdef CONFIG_FS_POSIX_ACL
 237         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 238                                    OBD_CONNECT_LARGE_ACL;
 239 #endif
 240
 241         data->ocd_cksum_types = obd_cksum_types_supported_client();
 242
 243         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 244                 /* flag mdc connection as lightweight, only used for test
 245                  * purpose, use with care */
 246                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 247
 248         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 249         data->ocd_version = LUSTRE_VERSION_CODE;
 250
 251         if (sb->s_flags & MS_RDONLY)
 252                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 253         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 254                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 255
 256 #ifdef MS_NOSEC
 257         /* Setting this indicates we correctly support S_NOSEC (See kernel
 258          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 259          */
 260         sb->s_flags |= MS_NOSEC;
 261 #endif
 262
 263         if (sbi->ll_flags & LL_SBI_FLOCK)
 264                 sbi->ll_fop = &ll_file_operations_flock;
 265         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 266                 sbi->ll_fop = &ll_file_operations;
 267         else
 268                 sbi->ll_fop = &ll_file_operations_noflock;
 269
 270         /* always ping even if server suppress_pings */
 271         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 272                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 273
 274         obd_connect_set_secctx(data);
 275
 276 #if defined(CONFIG_SECURITY)
 277         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 278 #endif
 279
 280         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 281
 282         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 283                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 284         if (err == -EBUSY) {
 285                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 286                                    "recovery, of which this client is not a "
 287                                    "part. Please wait for recovery to complete,"
 288                                    " abort, or time out.\n", md);
 289                 GOTO(out, err);
 290         } else if (err) {
 291                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 292                 GOTO(out, err);
 293         }
 294
 295         sbi->ll_md_exp->exp_connect_data = *data;
 296
 297         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 298                            LUSTRE_SEQ_METADATA);
 299         if (err) {
 300                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 301                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 302                 GOTO(out_md, err);
 303         }
 304
 305         /* For mount, we only need fs info from MDT0, and also in DNE, it
 306          * can make sure the client can be mounted as long as MDT0 is
 307          * avaible */
 308         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 309                         ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 310                         OBD_STATFS_FOR_MDT0);
 311         if (err)
 312                 GOTO(out_md_fid, err);
 313
 314         /* This needs to be after statfs to ensure connect has finished.
 315          * Note that "data" does NOT contain the valid connect reply.
 316          * If connecting to a 1.8 server there will be no LMV device, so
 317          * we can access the MDC export directly and exp_connect_flags will
 318          * be non-zero, but if accessing an upgraded 2.1 server it will
 319          * have the correct flags filled in.
 320          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 321         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 322         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 323             valid != CLIENT_CONNECT_MDT_REQD) {
 324                 char *buf;
 325
 326                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 327                 obd_connect_flags2str(buf, PAGE_SIZE,
 328                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 329                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 330                                    "feature(s) needed for correct operation "
 331                                    "of this client (%s). Please upgrade "
 332                                    "server or downgrade client.\n",
 333                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 334                 OBD_FREE(buf, PAGE_SIZE);
 335                 GOTO(out_md_fid, err = -EPROTO);
 336         }
 337
 338         size = sizeof(*data);
 339         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 340                            KEY_CONN_DATA,  &size, data);
 341         if (err) {
 342                 CERROR("%s: Get connect data failed: rc = %d\n",
 343                        sbi->ll_md_exp->exp_obd->obd_name, err);
 344                 GOTO(out_md_fid, err);
 345         }
 346
 347         LASSERT(osfs->os_bsize);
 348         sb->s_blocksize = osfs->os_bsize;
 349         sb->s_blocksize_bits = log2(osfs->os_bsize);
 350         sb->s_magic = LL_SUPER_MAGIC;
 351         sb->s_maxbytes = MAX_LFS_FILESIZE;
 352         sbi->ll_namelen = osfs->os_namelen;
 353         sbi->ll_mnt.mnt = current->fs->root.mnt;
 354
 355         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 356             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 357                 LCONSOLE_INFO("Disabling user_xattr feature because "
 358                               "it is not supported on the server\n");
 359                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 360         }
 361
 362         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 363 #ifdef MS_POSIXACL
 364                 sb->s_flags |= MS_POSIXACL;
 365 #endif
 366                 sbi->ll_flags |= LL_SBI_ACL;
 367         } else {
 368                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 369 #ifdef MS_POSIXACL
 370                 sb->s_flags &= ~MS_POSIXACL;
 371 #endif
 372                 sbi->ll_flags &= ~LL_SBI_ACL;
 373         }
 374
 375         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 376                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 377
 378         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 379                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 380
 381         if (obd_connect_has_secctx(data))
 382                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 383
 384         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 385                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 386                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 387                                       "unknown maximum xattr size.\n", dt);
 388                 } else if (!sbi->ll_xattr_cache_set) {
 389                         /* If xattr_cache is already set (no matter 0 or 1)
 390                          * during processing llog, it won't be enabled here. */
 391                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 392                         sbi->ll_xattr_cache_enabled = 1;
 393                 }
 394         }
 395
 396         sbi->ll_dt_obd = class_name2obd(dt);
 397         if (!sbi->ll_dt_obd) {
 398                 CERROR("DT %s: not setup or attached\n", dt);
 399                 GOTO(out_md_fid, err = -ENODEV);
 400         }
 401
 402         /* pass client page size via ocd_grant_blkbits, the server should report
 403          * back its backend blocksize for grant calculation purpose */
 404         data->ocd_grant_blkbits = PAGE_SHIFT;
 405
 406         /* indicate OST features supported by this client */
 407         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 408                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 409                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 410                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 411                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 412                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 413                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 414                                   OBD_CONNECT_EINPROGRESS |
 415                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 416                                   OBD_CONNECT_LAYOUTLOCK |
 417                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 418                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 419                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 420
 421 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 422  * can interoperate with an older version of lockahead which was released prior
 423  * to landing in master. This support will be dropped when 2.13 development
 424  * starts.  At the point, we should not just drop the connect flag (below), we
 425  * should also remove the support in the code.
 426  *
 427  * Removing it means a few things:
 428  * 1. Remove this section here
 429  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 430  * 3. Remove function exp_connect_lockahead_old
 431  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 432  * */
 433 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 434         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 435 #endif
 436
 437         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
 438
 439         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 440                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 441
 442         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 443          * disabled by default, because it can still be enabled on the
 444          * fly via /sys. As a consequence, we still need to come to an
 445          * agreement on the supported algorithms at connect time
 446          */
 447         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 448
 449         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 450                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 451         else
 452                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 453
 454 #ifdef HAVE_LRU_RESIZE_SUPPORT
 455         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 456 #endif
 457         /* always ping even if server suppress_pings */
 458         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 459                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 460
 461         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 462                "ocd_grant: %d\n", data->ocd_connect_flags,
 463                data->ocd_version, data->ocd_grant);
 464
 465         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 466         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 467
 468         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 469
 470         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 471                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 472         if (err == -EBUSY) {
 473                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 474                                    "recovery, of which this client is not a "
 475                                    "part.  Please wait for recovery to "
 476                                    "complete, abort, or time out.\n", dt);
 477                 GOTO(out_md, err);
 478         } else if (err) {
 479                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 480                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 481                 GOTO(out_md, err);
 482         }
 483
 484         sbi->ll_dt_exp->exp_connect_data = *data;
 485
 486         /* Don't change value if it was specified in the config log */
 487         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
 488                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 489                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 490                               (data->ocd_brw_size >> PAGE_SHIFT));
 491
 492         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 493                            LUSTRE_SEQ_METADATA);
 494         if (err) {
 495                 CERROR("%s: Can't init data layer FID infrastructure, "
 496                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 497                 GOTO(out_dt, err);
 498         }
 499
 500         mutex_lock(&sbi->ll_lco.lco_lock);
 501         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 502         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 503         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 504         mutex_unlock(&sbi->ll_lco.lco_lock);
 505
 506         fid_zero(&sbi->ll_root_fid);
 507         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 508                            &sbi->ll_root_fid);
 509         if (err) {
 510                 CERROR("cannot mds_connect: rc = %d\n", err);
 511                 GOTO(out_lock_cn_cb, err);
 512         }
 513         if (!fid_is_sane(&sbi->ll_root_fid)) {
 514                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 515                        sbi->ll_md_exp->exp_obd->obd_name,
 516                        PFID(&sbi->ll_root_fid));
 517                 GOTO(out_lock_cn_cb, err = -EINVAL);
 518         }
 519         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 520
 521         sb->s_op = &lustre_super_operations;
 522 #ifdef HAVE_XATTR_HANDLER_FLAGS
 523         sb->s_xattr = ll_xattr_handlers;
 524 #endif
 525 #if THREAD_SIZE >= 8192 /*b=17630*/
 526         sb->s_export_op = &lustre_export_operations;
 527 #endif
 528
 529         /* make root inode
 530          * XXX: move this to after cbd setup? */
 531         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 532         if (sbi->ll_flags & LL_SBI_ACL)
 533                 valid |= OBD_MD_FLACL;
 534
 535         OBD_ALLOC_PTR(op_data);
 536         if (op_data == NULL)
 537                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 538
 539         op_data->op_fid1 = sbi->ll_root_fid;
 540         op_data->op_mode = 0;
 541         op_data->op_valid = valid;
 542
 543         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 544
 545         OBD_FREE_PTR(op_data);
 546         if (err) {
 547                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 548                        sbi->ll_md_exp->exp_obd->obd_name, err);
 549                 GOTO(out_lock_cn_cb, err);
 550         }
 551
 552         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 553                                sbi->ll_md_exp, &lmd);
 554         if (err) {
 555                 CERROR("failed to understand root inode md: rc = %d\n", err);
 556                 ptlrpc_req_finished(request);
 557                 GOTO(out_lock_cn_cb, err);
 558         }
 559
 560         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 561         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 562                                             sbi->ll_flags & LL_SBI_32BIT_API),
 563                        &lmd);
 564         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 565         ptlrpc_req_finished(request);
 566
 567         if (IS_ERR(root)) {
 568 #ifdef CONFIG_FS_POSIX_ACL
 569                 if (lmd.posix_acl) {
 570                         posix_acl_release(lmd.posix_acl);
 571                         lmd.posix_acl = NULL;
 572                 }
 573 #endif
 574                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 575                 root = NULL;
 576                 CERROR("lustre_lite: bad iget4 for root\n");
 577                 GOTO(out_root, err);
 578         }
 579
 580         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 581         if (sbi->ll_checksum_set) {
 582                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 583                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 584                                          sizeof(checksum), &checksum, NULL);
 585                 if (err) {
 586                         CERROR("%s: Set checksum failed: rc = %d\n",
 587                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 588                         GOTO(out_root, err);
 589                 }
 590         }
 591         cl_sb_init(sb);
 592
 593         sb->s_root = d_make_root(root);
 594         if (sb->s_root == NULL) {
 595                 err = -ENOMEM;
 596                 CERROR("%s: can't make root dentry: rc = %d\n",
 597                        sbi->ll_fsname, err);
 598                 GOTO(out_root, err);
 599         }
 600 #ifdef HAVE_DCACHE_LOCK
 601         sb->s_root->d_op = &ll_d_ops;
 602 #endif
 603
 604         sbi->ll_sdev_orig = sb->s_dev;
 605
 606         /* We set sb->s_dev equal on all lustre clients in order to support
 607          * NFS export clustering.  NFSD requires that the FSID be the same
 608          * on all clients. */
 609         /* s_dev is also used in lt_compare() to compare two fs, but that is
 610          * only a node-local comparison. */
 611         uuid = obd_get_uuid(sbi->ll_md_exp);
 612         if (uuid != NULL)
 613                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 614
 615         if (data != NULL)
 616                 OBD_FREE_PTR(data);
 617         if (osfs != NULL)
 618                 OBD_FREE_PTR(osfs);
 619
 620         if (sbi->ll_dt_obd) {
 621                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 622                                         &sbi->ll_dt_obd->obd_kset.kobj,
 623                                         sbi->ll_dt_obd->obd_type->typ_name);
 624                 if (err < 0) {
 625                         CERROR("%s: could not register %s in llite: rc = %d\n",
 626                                dt, sbi->ll_fsname, err);
 627                         err = 0;
 628                 }
 629         }
 630
 631         if (sbi->ll_md_obd) {
 632                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 633                                         &sbi->ll_md_obd->obd_kset.kobj,
 634                                         sbi->ll_md_obd->obd_type->typ_name);
 635                 if (err < 0) {
 636                         CERROR("%s: could not register %s in llite: rc = %d\n",
 637                                md, sbi->ll_fsname, err);
 638                         err = 0;
 639                 }
 640         }
 641
 642         RETURN(err);
 643 out_root:
 644         if (root)
 645                 iput(root);
 646 out_lock_cn_cb:
 647         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 648 out_dt:
 649         obd_disconnect(sbi->ll_dt_exp);
 650         sbi->ll_dt_exp = NULL;
 651         sbi->ll_dt_obd = NULL;
 652 out_md_fid:
 653         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 654 out_md:
 655         obd_disconnect(sbi->ll_md_exp);
 656         sbi->ll_md_exp = NULL;
 657         sbi->ll_md_obd = NULL;
 658 out:
 659         if (data != NULL)
 660                 OBD_FREE_PTR(data);
 661         if (osfs != NULL)
 662                 OBD_FREE_PTR(osfs);
 663         return err;
 664 }
 665
 666 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 667 {
 668         int size, rc;
 669
 670         size = sizeof(*lmmsize);
 671         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 672                           KEY_MAX_EASIZE, &size, lmmsize);
 673         if (rc != 0) {
 674                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 675                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 676                 RETURN(rc);
 677         }
 678
 679         CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
 680
 681         size = sizeof(int);
 682         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 683                           KEY_MAX_EASIZE, &size, lmmsize);
 684         if (rc)
 685                 CERROR("Get max mdsize error rc %d\n", rc);
 686
 687         CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
 688
 689         RETURN(rc);
 690 }
 691
 692 /**
 693  * Get the value of the default_easize parameter.
 694  *
 695  * \see client_obd::cl_default_mds_easize
 696  *
 697  * \param[in] sbi       superblock info for this filesystem
 698  * \param[out] lmmsize  pointer to storage location for value
 699  *
 700  * \retval 0            on success
 701  * \retval negative     negated errno on failure
 702  */
 703 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 704 {
 705         int size, rc;
 706
 707         size = sizeof(int);
 708         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 709                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 710         if (rc)
 711                 CERROR("Get default mdsize error rc %d\n", rc);
 712
 713         RETURN(rc);
 714 }
 715
 716 /**
 717  * Set the default_easize parameter to the given value.
 718  *
 719  * \see client_obd::cl_default_mds_easize
 720  *
 721  * \param[in] sbi       superblock info for this filesystem
 722  * \param[in] lmmsize   the size to set
 723  *
 724  * \retval 0            on success
 725  * \retval negative     negated errno on failure
 726  */
 727 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 728 {
 729         int rc;
 730
 731         if (lmmsize < sizeof(struct lov_mds_md) ||
 732             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 733                 return -EINVAL;
 734
 735         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 736                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 737                                 sizeof(int), &lmmsize, NULL);
 738
 739         RETURN(rc);
 740 }
 741
 742 static void client_common_put_super(struct super_block *sb)
 743 {
 744         struct ll_sb_info *sbi = ll_s2sbi(sb);
 745         ENTRY;
 746
 747         cl_sb_fini(sb);
 748
 749         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 750         obd_disconnect(sbi->ll_dt_exp);
 751         sbi->ll_dt_exp = NULL;
 752
 753         ll_debugfs_unregister_super(sb);
 754
 755         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 756         obd_disconnect(sbi->ll_md_exp);
 757         sbi->ll_md_exp = NULL;
 758
 759         EXIT;
 760 }
 761
 762 void ll_kill_super(struct super_block *sb)
 763 {
 764         struct ll_sb_info *sbi;
 765         ENTRY;
 766
 767         /* not init sb ?*/
 768         if (!(sb->s_flags & MS_ACTIVE))
 769                 return;
 770
 771         sbi = ll_s2sbi(sb);
 772         /* we need restore s_dev from changed for clustred NFS before put_super
 773          * because new kernels have cached s_dev and change sb->s_dev in
 774          * put_super not affected real removing devices */
 775         if (sbi) {
 776                 sb->s_dev = sbi->ll_sdev_orig;
 777                 sbi->ll_umounting = 1;
 778
 779                 /* wait running statahead threads to quit */
 780                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 781                         set_current_state(TASK_UNINTERRUPTIBLE);
 782                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 783                 }
 784         }
 785
 786         EXIT;
 787 }
 788
 789 static inline int ll_set_opt(const char *opt, char *data, int fl)
 790 {
 791         if (strncmp(opt, data, strlen(opt)) != 0)
 792                 return 0;
 793         else
 794                 return fl;
 795 }
 796
 797 /* non-client-specific mount options are parsed in lmd_parse */
 798 static int ll_options(char *options, struct ll_sb_info *sbi)
 799 {
 800         int tmp;
 801         char *s1 = options, *s2;
 802         int *flags = &sbi->ll_flags;
 803         ENTRY;
 804
 805         if (!options)
 806                 RETURN(0);
 807
 808         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 809
 810         while (*s1) {
 811                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 812                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 813                 if (tmp) {
 814                         *flags |= tmp;
 815                         goto next;
 816                 }
 817                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 818                 if (tmp) {
 819                         *flags |= tmp;
 820                         goto next;
 821                 }
 822                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 823                 if (tmp) {
 824                         *flags |= tmp;
 825                         goto next;
 826                 }
 827                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 828                 if (tmp) {
 829                         *flags &= ~tmp;
 830                         goto next;
 831                 }
 832                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 833                 if (tmp) {
 834                         *flags |= tmp;
 835                         goto next;
 836                 }
 837                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 838                 if (tmp) {
 839                         *flags &= ~tmp;
 840                         goto next;
 841                 }
 842                 tmp = ll_set_opt("context", s1, 1);
 843                 if (tmp)
 844                         goto next;
 845                 tmp = ll_set_opt("fscontext", s1, 1);
 846                 if (tmp)
 847                         goto next;
 848                 tmp = ll_set_opt("defcontext", s1, 1);
 849                 if (tmp)
 850                         goto next;
 851                 tmp = ll_set_opt("rootcontext", s1, 1);
 852                 if (tmp)
 853                         goto next;
 854                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 860                 if (tmp) {
 861                         *flags &= ~tmp;
 862                         goto next;
 863                 }
 864
 865                 tmp = ll_set_opt("checksum", 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("nochecksum", s1, LL_SBI_CHECKSUM);
 872                 if (tmp) {
 873                         *flags &= ~tmp;
 874                         sbi->ll_checksum_set = 1;
 875                         goto next;
 876                 }
 877                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 878                 if (tmp) {
 879                         *flags |= tmp;
 880                         goto next;
 881                 }
 882                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 883                 if (tmp) {
 884                         *flags &= ~tmp;
 885                         goto next;
 886                 }
 887                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 888                 if (tmp) {
 889                         *flags |= tmp;
 890                         goto next;
 891                 }
 892                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 893                 if (tmp) {
 894                         *flags &= ~tmp;
 895                         goto next;
 896                 }
 897                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 898                 if (tmp) {
 899                         *flags |= tmp;
 900                         goto next;
 901                 }
 902                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 903                 if (tmp) {
 904                         *flags |= tmp;
 905                         goto next;
 906                 }
 907                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 908                 if (tmp) {
 909                         *flags &= ~tmp;
 910                         goto next;
 911                 }
 912                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 913                 if (tmp) {
 914                         *flags |= tmp;
 915                         goto next;
 916                 }
 917                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 918                                    s1);
 919                 RETURN(-EINVAL);
 920
 921 next:
 922                 /* Find next opt */
 923                 s2 = strchr(s1, ',');
 924                 if (s2 == NULL)
 925                         break;
 926                 s1 = s2 + 1;
 927         }
 928         RETURN(0);
 929 }
 930
 931 void ll_lli_init(struct ll_inode_info *lli)
 932 {
 933         lli->lli_inode_magic = LLI_INODE_MAGIC;
 934         lli->lli_flags = 0;
 935         spin_lock_init(&lli->lli_lock);
 936         lli->lli_posix_acl = NULL;
 937         /* Do not set lli_fid, it has been initialized already. */
 938         fid_zero(&lli->lli_pfid);
 939         lli->lli_mds_read_och = NULL;
 940         lli->lli_mds_write_och = NULL;
 941         lli->lli_mds_exec_och = NULL;
 942         lli->lli_open_fd_read_count = 0;
 943         lli->lli_open_fd_write_count = 0;
 944         lli->lli_open_fd_exec_count = 0;
 945         mutex_init(&lli->lli_och_mutex);
 946         spin_lock_init(&lli->lli_agl_lock);
 947         spin_lock_init(&lli->lli_layout_lock);
 948         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 949         lli->lli_clob = NULL;
 950
 951         init_rwsem(&lli->lli_xattrs_list_rwsem);
 952         mutex_init(&lli->lli_xattrs_enq_lock);
 953
 954         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 955         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 956                 mutex_init(&lli->lli_readdir_mutex);
 957                 lli->lli_opendir_key = NULL;
 958                 lli->lli_sai = NULL;
 959                 spin_lock_init(&lli->lli_sa_lock);
 960                 lli->lli_opendir_pid = 0;
 961                 lli->lli_sa_enabled = 0;
 962                 lli->lli_def_stripe_offset = -1;
 963                 init_rwsem(&lli->lli_lsm_sem);
 964         } else {
 965                 mutex_init(&lli->lli_size_mutex);
 966                 lli->lli_symlink_name = NULL;
 967                 init_rwsem(&lli->lli_trunc_sem);
 968                 range_lock_tree_init(&lli->lli_write_tree);
 969                 init_rwsem(&lli->lli_glimpse_sem);
 970                 lli->lli_glimpse_time = ktime_set(0, 0);
 971                 INIT_LIST_HEAD(&lli->lli_agl_list);
 972                 lli->lli_agl_index = 0;
 973                 lli->lli_async_rc = 0;
 974                 spin_lock_init(&lli->lli_heat_lock);
 975                 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
 976                 lli->lli_heat_flags = 0;
 977         }
 978         mutex_init(&lli->lli_layout_mutex);
 979         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
 980 }
 981
 982 #define MAX_STRING_SIZE 128
 983
 984 #ifndef HAVE_SUPER_SETUP_BDI_NAME
 985
 986 #define LSI_BDI_INITIALIZED     0x00400000
 987
 988 #ifndef HAVE_BDI_CAP_MAP_COPY
 989 # define BDI_CAP_MAP_COPY       0
 990 #endif
 991
 992 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
 993 {
 994         struct  lustre_sb_info *lsi = s2lsi(sb);
 995         char buf[MAX_STRING_SIZE];
 996         va_list args;
 997         int err;
 998
 999         err = bdi_init(&lsi->lsi_bdi);
1000         if (err)
1001                 return err;
1002
1003         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1004         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1005         lsi->lsi_bdi.name = "lustre";
1006         va_start(args, fmt);
1007         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1008         va_end(args);
1009         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1010         va_end(args);
1011         if (!err)
1012                 sb->s_bdi = &lsi->lsi_bdi;
1013
1014         return err;
1015 }
1016 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1017
1018 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1019 {
1020         struct  lustre_profile *lprof = NULL;
1021         struct  lustre_sb_info *lsi = s2lsi(sb);
1022         struct  ll_sb_info *sbi = NULL;
1023         char    *dt = NULL, *md = NULL;
1024         char    *profilenm = get_profile_name(sb);
1025         struct config_llog_instance *cfg;
1026         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1027         const int instlen = 16 + 2;
1028         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1029         char name[MAX_STRING_SIZE];
1030         int md_len = 0;
1031         int dt_len = 0;
1032         uuid_t uuid;
1033         char *ptr;
1034         int len;
1035         int err;
1036
1037         ENTRY;
1038         /* for ASLR, to map between cfg_instance and hashed ptr */
1039         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1040                profilenm, cfg_instance, sb);
1041
1042         try_module_get(THIS_MODULE);
1043
1044         OBD_ALLOC_PTR(cfg);
1045         if (cfg == NULL)
1046                 GOTO(out_free_cfg, err = -ENOMEM);
1047
1048         /* client additional sb info */
1049         lsi->lsi_llsbi = sbi = ll_init_sbi();
1050         if (!sbi)
1051                 GOTO(out_free_cfg, err = -ENOMEM);
1052
1053         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1054         if (err)
1055                 GOTO(out_free_cfg, err);
1056
1057 #ifndef HAVE_DCACHE_LOCK
1058         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1059         sb->s_d_op = &ll_d_ops;
1060 #endif
1061         /* UUID handling */
1062         generate_random_uuid(uuid.b);
1063         snprintf(sbi->ll_sb_uuid.uuid, UUID_SIZE, "%pU", uuid.b);
1064
1065         CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1066
1067         /* Get fsname */
1068         len = strlen(profilenm);
1069         ptr = strrchr(profilenm, '-');
1070         if (ptr && (strcmp(ptr, "-client") == 0))
1071                 len -= 7;
1072
1073         if (len > LUSTRE_MAXFSNAME) {
1074                 if (unlikely(len >= MAX_STRING_SIZE))
1075                         len = MAX_STRING_SIZE - 1;
1076                 strncpy(name, profilenm, len);
1077                 name[len] = '\0';
1078                 err = -ENAMETOOLONG;
1079                 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1080                        name, LUSTRE_MAXFSNAME, err);
1081                 GOTO(out_free_cfg, err);
1082         }
1083         strncpy(sbi->ll_fsname, profilenm, len);
1084         sbi->ll_fsname[len] = '\0';
1085
1086         /* Mount info */
1087         snprintf(name, sizeof(name), "%.*s-%016lx", len,
1088                  profilenm, cfg_instance);
1089
1090         err = super_setup_bdi_name(sb, "%s", name);
1091         if (err)
1092                 GOTO(out_free_cfg, err);
1093
1094         /* Call ll_debugfs_register_super() before lustre_process_log()
1095          * so that "llite.*.*" params can be processed correctly.
1096          */
1097         err = ll_debugfs_register_super(sb, name);
1098         if (err < 0) {
1099                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1100                        sbi->ll_fsname, err);
1101                 err = 0;
1102         }
1103
1104         /* The cfg_instance is a value unique to this super, in case some
1105          * joker tries to mount the same fs at two mount points.
1106          */
1107         cfg->cfg_instance = cfg_instance;
1108         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1109         cfg->cfg_callback = class_config_llog_handler;
1110         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1111         /* set up client obds */
1112         err = lustre_process_log(sb, profilenm, cfg);
1113         if (err < 0)
1114                 GOTO(out_debugfs, err);
1115
1116         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1117         lprof = class_get_profile(profilenm);
1118         if (lprof == NULL) {
1119                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1120                                    " read from the MGS.  Does that filesystem "
1121                                    "exist?\n", profilenm);
1122                 GOTO(out_debugfs, err = -EINVAL);
1123         }
1124         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1125                lprof->lp_md, lprof->lp_dt);
1126
1127         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1128         OBD_ALLOC(dt, dt_len);
1129         if (!dt)
1130                 GOTO(out_profile, err = -ENOMEM);
1131         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1132
1133         md_len = strlen(lprof->lp_md) + instlen + 2;
1134         OBD_ALLOC(md, md_len);
1135         if (!md)
1136                 GOTO(out_free_dt, err = -ENOMEM);
1137         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1138
1139         /* connections, registrations, sb setup */
1140         err = client_common_fill_super(sb, md, dt, mnt);
1141         if (err < 0)
1142                 GOTO(out_free_md, err);
1143
1144         sbi->ll_client_common_fill_super_succeeded = 1;
1145
1146 out_free_md:
1147         if (md)
1148                 OBD_FREE(md, md_len);
1149 out_free_dt:
1150         if (dt)
1151                 OBD_FREE(dt, dt_len);
1152 out_profile:
1153         if (lprof)
1154                 class_put_profile(lprof);
1155 out_debugfs:
1156         if (err < 0)
1157                 ll_debugfs_unregister_super(sb);
1158 out_free_cfg:
1159         if (cfg)
1160                 OBD_FREE_PTR(cfg);
1161
1162         if (err)
1163                 ll_put_super(sb);
1164         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1165                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1166         RETURN(err);
1167 } /* ll_fill_super */
1168
1169 void ll_put_super(struct super_block *sb)
1170 {
1171         struct config_llog_instance cfg, params_cfg;
1172         struct obd_device *obd;
1173         struct lustre_sb_info *lsi = s2lsi(sb);
1174         struct ll_sb_info *sbi = ll_s2sbi(sb);
1175         char *profilenm = get_profile_name(sb);
1176         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1177         long ccc_count;
1178         int next, force = 1, rc = 0;
1179         ENTRY;
1180
1181         if (!sbi)
1182                 GOTO(out_no_sbi, 0);
1183
1184         /* Should replace instance_id with something better for ASLR */
1185         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1186                profilenm, cfg_instance, sb);
1187
1188         cfg.cfg_instance = cfg_instance;
1189         lustre_end_log(sb, profilenm, &cfg);
1190
1191         params_cfg.cfg_instance = cfg_instance;
1192         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1193
1194         if (sbi->ll_md_exp) {
1195                 obd = class_exp2obd(sbi->ll_md_exp);
1196                 if (obd)
1197                         force = obd->obd_force;
1198         }
1199
1200         /* Wait for unstable pages to be committed to stable storage */
1201         if (force == 0) {
1202                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1203                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1204                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1205                         &lwi);
1206         }
1207
1208         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1209         if (force == 0 && rc != -EINTR)
1210                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1211
1212         /* We need to set force before the lov_disconnect in
1213            lustre_common_put_super, since l_d cleans up osc's as well. */
1214         if (force) {
1215                 next = 0;
1216                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1217                                                      &next)) != NULL) {
1218                         obd->obd_force = force;
1219                 }
1220         }
1221
1222         if (sbi->ll_client_common_fill_super_succeeded) {
1223                 /* Only if client_common_fill_super succeeded */
1224                 client_common_put_super(sb);
1225         }
1226
1227         next = 0;
1228         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1229                 class_manual_cleanup(obd);
1230         }
1231
1232         if (sbi->ll_flags & LL_SBI_VERBOSE)
1233                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1234
1235         if (profilenm)
1236                 class_del_profile(profilenm);
1237
1238 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1239         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1240                 bdi_destroy(&lsi->lsi_bdi);
1241                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1242         }
1243 #endif
1244
1245         ll_free_sbi(sb);
1246         lsi->lsi_llsbi = NULL;
1247 out_no_sbi:
1248         lustre_common_put_super(sb);
1249
1250         cl_env_cache_purge(~0);
1251
1252         module_put(THIS_MODULE);
1253
1254         EXIT;
1255 } /* client_put_super */
1256
1257 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1258 {
1259         struct inode *inode = NULL;
1260
1261         /* NOTE: we depend on atomic igrab() -bzzz */
1262         lock_res_and_lock(lock);
1263         if (lock->l_resource->lr_lvb_inode) {
1264                 struct ll_inode_info * lli;
1265                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1266                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1267                         inode = igrab(lock->l_resource->lr_lvb_inode);
1268                 } else {
1269                         inode = lock->l_resource->lr_lvb_inode;
1270                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1271                                          D_WARNING, lock, "lr_lvb_inode %p is "
1272                                          "bogus: magic %08x",
1273                                          lock->l_resource->lr_lvb_inode,
1274                                          lli->lli_inode_magic);
1275                         inode = NULL;
1276                 }
1277         }
1278         unlock_res_and_lock(lock);
1279         return inode;
1280 }
1281
1282 void ll_dir_clear_lsm_md(struct inode *inode)
1283 {
1284         struct ll_inode_info *lli = ll_i2info(inode);
1285
1286         LASSERT(S_ISDIR(inode->i_mode));
1287
1288         if (lli->lli_lsm_md != NULL) {
1289                 lmv_free_memmd(lli->lli_lsm_md);
1290                 lli->lli_lsm_md = NULL;
1291         }
1292 }
1293
1294 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1295                                       const struct lu_fid *fid,
1296                                       struct lustre_md *md)
1297 {
1298         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1299         struct mdt_body         *body = md->body;
1300         struct inode            *inode;
1301         ino_t                   ino;
1302         ENTRY;
1303
1304         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1305         inode = iget_locked(sb, ino);
1306         if (inode == NULL) {
1307                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1308                        sbi->ll_fsname, PFID(fid));
1309                 RETURN(ERR_PTR(-ENOENT));
1310         }
1311
1312         if (inode->i_state & I_NEW) {
1313                 struct ll_inode_info *lli = ll_i2info(inode);
1314                 struct lmv_stripe_md *lsm = md->lmv;
1315
1316                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1317                                 (body->mbo_mode & S_IFMT);
1318                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1319                          PFID(fid));
1320
1321                 inode->i_mtime.tv_sec = 0;
1322                 inode->i_atime.tv_sec = 0;
1323                 inode->i_ctime.tv_sec = 0;
1324                 inode->i_rdev = 0;
1325
1326 #ifdef HAVE_BACKING_DEV_INFO
1327                 /* initializing backing dev info. */
1328                 inode->i_mapping->backing_dev_info =
1329                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1330 #endif
1331                 inode->i_op = &ll_dir_inode_operations;
1332                 inode->i_fop = &ll_dir_operations;
1333                 lli->lli_fid = *fid;
1334                 ll_lli_init(lli);
1335
1336                 LASSERT(lsm != NULL);
1337                 /* master object FID */
1338                 lli->lli_pfid = body->mbo_fid1;
1339                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1340                        lli, PFID(fid), PFID(&lli->lli_pfid));
1341                 unlock_new_inode(inode);
1342         }
1343
1344         RETURN(inode);
1345 }
1346
1347 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1348 {
1349         struct lu_fid *fid;
1350         struct lmv_stripe_md *lsm = md->lmv;
1351         struct ll_inode_info *lli = ll_i2info(inode);
1352         int i;
1353
1354         LASSERT(lsm != NULL);
1355
1356         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1357                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1358         lsm_md_dump(D_INODE, lsm);
1359
1360         /* XXX sigh, this lsm_root initialization should be in
1361          * LMV layer, but it needs ll_iget right now, so we
1362          * put this here right now. */
1363         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1364                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1365                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1366
1367                 if (!fid_is_sane(fid))
1368                         continue;
1369
1370                 /* Unfortunately ll_iget will call ll_update_inode,
1371                  * where the initialization of slave inode is slightly
1372                  * different, so it reset lsm_md to NULL to avoid
1373                  * initializing lsm for slave inode. */
1374                 lsm->lsm_md_oinfo[i].lmo_root =
1375                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1376                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1377                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1378
1379                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1380                         while (i-- > 0) {
1381                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1382                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1383                         }
1384                         return rc;
1385                 }
1386         }
1387
1388         lli->lli_lsm_md = lsm;
1389
1390         return 0;
1391 }
1392
1393 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1394 {
1395         struct ll_inode_info *lli = ll_i2info(inode);
1396         struct lmv_stripe_md *lsm = md->lmv;
1397         int rc = 0;
1398
1399         ENTRY;
1400
1401         LASSERT(S_ISDIR(inode->i_mode));
1402         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1403                PFID(ll_inode2fid(inode)));
1404
1405         /*
1406          * no striped information from request, lustre_md from req does not
1407          * include stripeEA, see ll_md_setattr()
1408          */
1409         if (!lsm)
1410                 RETURN(0);
1411
1412         /*
1413          * normally dir layout doesn't change, only take read lock to check
1414          * that to avoid blocking other MD operations.
1415          */
1416         if (lli->lli_lsm_md)
1417                 down_read(&lli->lli_lsm_sem);
1418         else
1419                 down_write(&lli->lli_lsm_sem);
1420
1421         /*
1422          * if dir layout mismatch, check whether version is increased, which
1423          * means layout is changed, this happens in dir migration and lfsck.
1424          *
1425          * foreign LMV should not change.
1426          */
1427         if (lli->lli_lsm_md &&
1428             lli->lli_lsm_md->lsm_md_magic != LMV_MAGIC_FOREIGN &&
1429            !lsm_md_eq(lli->lli_lsm_md, lsm)) {
1430                 if (lsm->lsm_md_layout_version <=
1431                     lli->lli_lsm_md->lsm_md_layout_version) {
1432                         CERROR("%s: "DFID" dir layout mismatch:\n",
1433                                ll_i2sbi(inode)->ll_fsname,
1434                                PFID(&lli->lli_fid));
1435                         lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1436                         lsm_md_dump(D_ERROR, lsm);
1437                         GOTO(unlock, rc = -EINVAL);
1438                 }
1439
1440                 /* layout changed, switch to write lock */
1441                 up_read(&lli->lli_lsm_sem);
1442                 down_write(&lli->lli_lsm_sem);
1443                 ll_dir_clear_lsm_md(inode);
1444         }
1445
1446         /* set directory layout */
1447         if (!lli->lli_lsm_md) {
1448                 struct cl_attr  *attr;
1449
1450                 if (lsm->lsm_md_magic == LMV_MAGIC_FOREIGN) {
1451                         /* set md->lmv to NULL, so the following free lustre_md
1452                          * will not free this lsm */
1453                         md->lmv = NULL;
1454                         lli->lli_lsm_md = lsm;
1455                         up_write(&lli->lli_lsm_sem);
1456                         RETURN(0);
1457                 }
1458
1459                 rc = ll_init_lsm_md(inode, md);
1460                 up_write(&lli->lli_lsm_sem);
1461                 if (rc != 0)
1462                         RETURN(rc);
1463
1464                 /* set md->lmv to NULL, so the following free lustre_md
1465                  * will not free this lsm */
1466                 md->lmv = NULL;
1467
1468                 /*
1469                  * md_merge_attr() may take long, since lsm is already set,
1470                  * switch to read lock.
1471                  */
1472                 down_read(&lli->lli_lsm_sem);
1473
1474                 OBD_ALLOC_PTR(attr);
1475                 if (attr == NULL)
1476                         GOTO(unlock, rc = -ENOMEM);
1477
1478                 /* validate the lsm */
1479                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1480                                    ll_md_blocking_ast);
1481                 if (rc != 0) {
1482                         OBD_FREE_PTR(attr);
1483                         GOTO(unlock, rc);
1484                 }
1485
1486                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1487                         md->body->mbo_nlink = attr->cat_nlink;
1488                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1489                         md->body->mbo_size = attr->cat_size;
1490                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1491                         md->body->mbo_atime = attr->cat_atime;
1492                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1493                         md->body->mbo_ctime = attr->cat_ctime;
1494                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1495                         md->body->mbo_mtime = attr->cat_mtime;
1496
1497                 OBD_FREE_PTR(attr);
1498         }
1499 unlock:
1500         up_read(&lli->lli_lsm_sem);
1501
1502         RETURN(rc);
1503 }
1504
1505 void ll_clear_inode(struct inode *inode)
1506 {
1507         struct ll_inode_info *lli = ll_i2info(inode);
1508         struct ll_sb_info *sbi = ll_i2sbi(inode);
1509         ENTRY;
1510
1511         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1512                PFID(ll_inode2fid(inode)), inode);
1513
1514         if (S_ISDIR(inode->i_mode)) {
1515                 /* these should have been cleared in ll_file_release */
1516                 LASSERT(lli->lli_opendir_key == NULL);
1517                 LASSERT(lli->lli_sai == NULL);
1518                 LASSERT(lli->lli_opendir_pid == 0);
1519         }
1520
1521         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1522
1523         LASSERT(!lli->lli_open_fd_write_count);
1524         LASSERT(!lli->lli_open_fd_read_count);
1525         LASSERT(!lli->lli_open_fd_exec_count);
1526
1527         if (lli->lli_mds_write_och)
1528                 ll_md_real_close(inode, FMODE_WRITE);
1529         if (lli->lli_mds_exec_och)
1530                 ll_md_real_close(inode, FMODE_EXEC);
1531         if (lli->lli_mds_read_och)
1532                 ll_md_real_close(inode, FMODE_READ);
1533
1534         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1535                 OBD_FREE(lli->lli_symlink_name,
1536                          strlen(lli->lli_symlink_name) + 1);
1537                 lli->lli_symlink_name = NULL;
1538         }
1539
1540         ll_xattr_cache_destroy(inode);
1541
1542 #ifdef CONFIG_FS_POSIX_ACL
1543         forget_all_cached_acls(inode);
1544         if (lli->lli_posix_acl) {
1545                 posix_acl_release(lli->lli_posix_acl);
1546                 lli->lli_posix_acl = NULL;
1547         }
1548 #endif
1549         lli->lli_inode_magic = LLI_INODE_DEAD;
1550
1551         if (S_ISDIR(inode->i_mode))
1552                 ll_dir_clear_lsm_md(inode);
1553         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1554                 LASSERT(list_empty(&lli->lli_agl_list));
1555
1556         /*
1557          * XXX This has to be done before lsm is freed below, because
1558          * cl_object still uses inode lsm.
1559          */
1560         cl_inode_fini(inode);
1561
1562         EXIT;
1563 }
1564
1565 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1566 {
1567         struct lustre_md md;
1568         struct inode *inode = dentry->d_inode;
1569         struct ll_sb_info *sbi = ll_i2sbi(inode);
1570         struct ptlrpc_request *request = NULL;
1571         int rc, ia_valid;
1572         ENTRY;
1573
1574         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1575                                      LUSTRE_OPC_ANY, NULL);
1576         if (IS_ERR(op_data))
1577                 RETURN(PTR_ERR(op_data));
1578
1579         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1580         if (rc) {
1581                 ptlrpc_req_finished(request);
1582                 if (rc == -ENOENT) {
1583                         clear_nlink(inode);
1584                         /* Unlinked special device node? Or just a race?
1585                          * Pretend we done everything. */
1586                         if (!S_ISREG(inode->i_mode) &&
1587                             !S_ISDIR(inode->i_mode)) {
1588                                 ia_valid = op_data->op_attr.ia_valid;
1589                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1590                                 rc = simple_setattr(dentry, &op_data->op_attr);
1591                                 op_data->op_attr.ia_valid = ia_valid;
1592                         }
1593                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1594                         CERROR("md_setattr fails: rc = %d\n", rc);
1595                 }
1596                 RETURN(rc);
1597         }
1598
1599         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1600                               sbi->ll_md_exp, &md);
1601         if (rc) {
1602                 ptlrpc_req_finished(request);
1603                 RETURN(rc);
1604         }
1605
1606         ia_valid = op_data->op_attr.ia_valid;
1607         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1608          * cache is not cleared yet. */
1609         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1610         if (S_ISREG(inode->i_mode))
1611                 inode_lock(inode);
1612         rc = simple_setattr(dentry, &op_data->op_attr);
1613         if (S_ISREG(inode->i_mode))
1614                 inode_unlock(inode);
1615         op_data->op_attr.ia_valid = ia_valid;
1616
1617         rc = ll_update_inode(inode, &md);
1618         ptlrpc_req_finished(request);
1619
1620         RETURN(rc);
1621 }
1622
1623 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1624  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1625  * keep these values until such a time that objects are allocated for it.
1626  * We do the MDS operations first, as it is checking permissions for us.
1627  * We don't to the MDS RPC if there is nothing that we want to store there,
1628  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1629  * going to do an RPC anyways.
1630  *
1631  * If we are doing a truncate, we will send the mtime and ctime updates
1632  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1633  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1634  * at the same time.
1635  *
1636  * In case of HSMimport, we only set attr on MDS.
1637  */
1638 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1639                    enum op_xvalid xvalid, bool hsm_import)
1640 {
1641         struct inode *inode = dentry->d_inode;
1642         struct ll_inode_info *lli = ll_i2info(inode);
1643         struct md_op_data *op_data = NULL;
1644         int rc = 0;
1645         ENTRY;
1646
1647         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1648                "valid %x, hsm_import %d\n",
1649                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
1650                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1651                hsm_import);
1652
1653         if (attr->ia_valid & ATTR_SIZE) {
1654                 /* Check new size against VFS/VM file size limit and rlimit */
1655                 rc = inode_newsize_ok(inode, attr->ia_size);
1656                 if (rc)
1657                         RETURN(rc);
1658
1659                 /* The maximum Lustre file size is variable, based on the
1660                  * OST maximum object size and number of stripes.  This
1661                  * needs another check in addition to the VFS check above. */
1662                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1663                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1664                                PFID(&lli->lli_fid), attr->ia_size,
1665                                ll_file_maxbytes(inode));
1666                         RETURN(-EFBIG);
1667                 }
1668
1669                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1670         }
1671
1672         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1673         if (attr->ia_valid & TIMES_SET_FLAGS) {
1674                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1675                     !cfs_capable(CFS_CAP_FOWNER))
1676                         RETURN(-EPERM);
1677         }
1678
1679         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1680         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1681              (attr->ia_valid & ATTR_CTIME)) {
1682                 attr->ia_ctime = current_time(inode);
1683                 xvalid |= OP_XVALID_CTIME_SET;
1684         }
1685         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1686             (attr->ia_valid & ATTR_ATIME)) {
1687                 attr->ia_atime = current_time(inode);
1688                 attr->ia_valid |= ATTR_ATIME_SET;
1689         }
1690         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1691             (attr->ia_valid & ATTR_MTIME)) {
1692                 attr->ia_mtime = current_time(inode);
1693                 attr->ia_valid |= ATTR_MTIME_SET;
1694         }
1695
1696         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1697                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1698                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1699                        ktime_get_real_seconds());
1700
1701         if (S_ISREG(inode->i_mode)) {
1702                 if (attr->ia_valid & ATTR_SIZE)
1703                         inode_dio_write_done(inode);
1704                 inode_unlock(inode);
1705         }
1706
1707         /* We always do an MDS RPC, even if we're only changing the size;
1708          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1709
1710         OBD_ALLOC_PTR(op_data);
1711         if (op_data == NULL)
1712                 GOTO(out, rc = -ENOMEM);
1713
1714         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1715                 /* If we are changing file size, file content is
1716                  * modified, flag it.
1717                  */
1718                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1719                 op_data->op_bias |= MDS_DATA_MODIFIED;
1720                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1721         }
1722
1723         if (attr->ia_valid & ATTR_FILE) {
1724                 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1725
1726                 if (fd->fd_lease_och)
1727                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1728         }
1729
1730         op_data->op_attr = *attr;
1731         op_data->op_xvalid = xvalid;
1732
1733         rc = ll_md_setattr(dentry, op_data);
1734         if (rc)
1735                 GOTO(out, rc);
1736
1737         if (!S_ISREG(inode->i_mode) || hsm_import)
1738                 GOTO(out, rc = 0);
1739
1740         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1741                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1742             xvalid & OP_XVALID_CTIME_SET) {
1743                 /* For truncate and utimes sending attributes to OSTs, setting
1744                  * mtime/atime to the past will be performed under PW [0:EOF]
1745                  * extent lock (new_size:EOF for truncate).  It may seem
1746                  * excessive to send mtime/atime updates to OSTs when not
1747                  * setting times to past, but it is necessary due to possible
1748                  * time de-synchronization between MDT inode and OST objects
1749                  */
1750                 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1751         }
1752
1753         /* If the file was restored, it needs to set dirty flag.
1754          *
1755          * We've already sent MDS_DATA_MODIFIED flag in
1756          * ll_md_setattr() for truncate. However, the MDT refuses to
1757          * set the HS_DIRTY flag on released files, so we have to set
1758          * it again if the file has been restored. Please check how
1759          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1760          *
1761          * Please notice that if the file is not released, the previous
1762          * MDS_DATA_MODIFIED has taken effect and usually
1763          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1764          * This way we can save an RPC for common open + trunc
1765          * operation. */
1766         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1767                 struct hsm_state_set hss = {
1768                         .hss_valid = HSS_SETMASK,
1769                         .hss_setmask = HS_DIRTY,
1770                 };
1771                 int rc2;
1772
1773                 rc2 = ll_hsm_state_set(inode, &hss);
1774                 /* truncate and write can happen at the same time, so that
1775                  * the file can be set modified even though the file is not
1776                  * restored from released state, and ll_hsm_state_set() is
1777                  * not applicable for the file, and rc2 < 0 is normal in this
1778                  * case. */
1779                 if (rc2 < 0)
1780                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1781                                PFID(ll_inode2fid(inode)), rc2);
1782         }
1783
1784         EXIT;
1785 out:
1786         if (op_data != NULL)
1787                 ll_finish_md_op_data(op_data);
1788
1789         if (S_ISREG(inode->i_mode)) {
1790                 inode_lock(inode);
1791                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1792                         inode_dio_wait(inode);
1793                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1794                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1795                  * inode flags, so there is a gap where S_NOSEC is not set.
1796                  * This can cause a writer to take the i_mutex unnecessarily,
1797                  * but this is safe to do and should be rare. */
1798                 inode_has_no_xattr(inode);
1799         }
1800
1801         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1802                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1803
1804         return rc;
1805 }
1806
1807 int ll_setattr(struct dentry *de, struct iattr *attr)
1808 {
1809         int mode = de->d_inode->i_mode;
1810         enum op_xvalid xvalid = 0;
1811
1812         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1813                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1814                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1815
1816         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1817                                (ATTR_SIZE|ATTR_MODE)) &&
1818             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1819              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1820               !(attr->ia_mode & S_ISGID))))
1821                 attr->ia_valid |= ATTR_FORCE;
1822
1823         if ((attr->ia_valid & ATTR_MODE) &&
1824             (mode & S_ISUID) &&
1825             !(attr->ia_mode & S_ISUID) &&
1826             !(attr->ia_valid & ATTR_KILL_SUID))
1827                 attr->ia_valid |= ATTR_KILL_SUID;
1828
1829         if ((attr->ia_valid & ATTR_MODE) &&
1830             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1831             !(attr->ia_mode & S_ISGID) &&
1832             !(attr->ia_valid & ATTR_KILL_SGID))
1833                 attr->ia_valid |= ATTR_KILL_SGID;
1834
1835         return ll_setattr_raw(de, attr, xvalid, false);
1836 }
1837
1838 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1839                        u32 flags)
1840 {
1841         struct obd_statfs obd_osfs = { 0 };
1842         time64_t max_age;
1843         int rc;
1844
1845         ENTRY;
1846         max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1847
1848         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1849         if (rc)
1850                 RETURN(rc);
1851
1852         osfs->os_type = LL_SUPER_MAGIC;
1853
1854         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1855               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1856
1857         if (osfs->os_state & OS_STATE_SUM)
1858                 GOTO(out, rc);
1859
1860         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1861                 flags |= OBD_STATFS_NODELAY;
1862
1863         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1864         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
1865                 GOTO(out, rc = 0);
1866
1867         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1868                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1869                obd_osfs.os_files);
1870
1871         osfs->os_bsize = obd_osfs.os_bsize;
1872         osfs->os_blocks = obd_osfs.os_blocks;
1873         osfs->os_bfree = obd_osfs.os_bfree;
1874         osfs->os_bavail = obd_osfs.os_bavail;
1875
1876         /* If we have _some_ OSTs, but don't have as many free objects on the
1877          * OSTs as inodes on the MDTs, reduce the reported number of inodes
1878          * to compensate, so that the "inodes in use" number is correct.
1879          * This should be kept in sync with lod_statfs() behaviour.
1880          */
1881         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1882                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1883                                  obd_osfs.os_ffree;
1884                 osfs->os_ffree = obd_osfs.os_ffree;
1885         }
1886
1887 out:
1888         RETURN(rc);
1889 }
1890 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1891 {
1892         struct super_block *sb = de->d_sb;
1893         struct obd_statfs osfs;
1894         __u64 fsid = huge_encode_dev(sb->s_dev);
1895         int rc;
1896
1897         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1898         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1899
1900         /* Some amount of caching on the client is allowed */
1901         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1902         if (rc)
1903                 return rc;
1904
1905         statfs_unpack(sfs, &osfs);
1906
1907         /* We need to downshift for all 32-bit kernels, because we can't
1908          * tell if the kernel is being called via sys_statfs64() or not.
1909          * Stop before overflowing f_bsize - in which case it is better
1910          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1911         if (sizeof(long) < 8) {
1912                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1913                         sfs->f_bsize <<= 1;
1914
1915                         osfs.os_blocks >>= 1;
1916                         osfs.os_bfree >>= 1;
1917                         osfs.os_bavail >>= 1;
1918                 }
1919         }
1920
1921         sfs->f_blocks = osfs.os_blocks;
1922         sfs->f_bfree = osfs.os_bfree;
1923         sfs->f_bavail = osfs.os_bavail;
1924         sfs->f_fsid.val[0] = (__u32)fsid;
1925         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1926         return 0;
1927 }
1928
1929 void ll_inode_size_lock(struct inode *inode)
1930 {
1931         struct ll_inode_info *lli;
1932
1933         LASSERT(!S_ISDIR(inode->i_mode));
1934
1935         lli = ll_i2info(inode);
1936         mutex_lock(&lli->lli_size_mutex);
1937 }
1938
1939 void ll_inode_size_unlock(struct inode *inode)
1940 {
1941         struct ll_inode_info *lli;
1942
1943         lli = ll_i2info(inode);
1944         mutex_unlock(&lli->lli_size_mutex);
1945 }
1946
1947 void ll_update_inode_flags(struct inode *inode, int ext_flags)
1948 {
1949         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
1950         if (ext_flags & LUSTRE_PROJINHERIT_FL)
1951                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1952         else
1953                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1954 }
1955
1956 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1957 {
1958         struct ll_inode_info *lli = ll_i2info(inode);
1959         struct mdt_body *body = md->body;
1960         struct ll_sb_info *sbi = ll_i2sbi(inode);
1961         int rc = 0;
1962
1963         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1964                 rc = cl_file_inode_init(inode, md);
1965                 if (rc)
1966                         return rc;
1967         }
1968
1969         if (S_ISDIR(inode->i_mode)) {
1970                 rc = ll_update_lsm_md(inode, md);
1971                 if (rc != 0)
1972                         return rc;
1973         }
1974
1975 #ifdef CONFIG_FS_POSIX_ACL
1976         if (body->mbo_valid & OBD_MD_FLACL) {
1977                 spin_lock(&lli->lli_lock);
1978                 if (lli->lli_posix_acl)
1979                         posix_acl_release(lli->lli_posix_acl);
1980                 lli->lli_posix_acl = md->posix_acl;
1981                 spin_unlock(&lli->lli_lock);
1982         }
1983 #endif
1984         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1985                                         sbi->ll_flags & LL_SBI_32BIT_API);
1986         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1987
1988         if (body->mbo_valid & OBD_MD_FLATIME) {
1989                 if (body->mbo_atime > inode->i_atime.tv_sec)
1990                         inode->i_atime.tv_sec = body->mbo_atime;
1991                 lli->lli_atime = body->mbo_atime;
1992         }
1993
1994         if (body->mbo_valid & OBD_MD_FLMTIME) {
1995                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
1996                         CDEBUG(D_INODE,
1997                                "setting ino %lu mtime from %lld to %llu\n",
1998                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
1999                                body->mbo_mtime);
2000                         inode->i_mtime.tv_sec = body->mbo_mtime;
2001                 }
2002                 lli->lli_mtime = body->mbo_mtime;
2003         }
2004
2005         if (body->mbo_valid & OBD_MD_FLCTIME) {
2006                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2007                         inode->i_ctime.tv_sec = body->mbo_ctime;
2008                 lli->lli_ctime = body->mbo_ctime;
2009         }
2010
2011         /* Clear i_flags to remove S_NOSEC before permissions are updated */
2012         if (body->mbo_valid & OBD_MD_FLFLAGS)
2013                 ll_update_inode_flags(inode, body->mbo_flags);
2014         if (body->mbo_valid & OBD_MD_FLMODE)
2015                 inode->i_mode = (inode->i_mode & S_IFMT) |
2016                                 (body->mbo_mode & ~S_IFMT);
2017
2018         if (body->mbo_valid & OBD_MD_FLTYPE)
2019                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2020                                 (body->mbo_mode & S_IFMT);
2021
2022         LASSERT(inode->i_mode != 0);
2023         if (S_ISREG(inode->i_mode))
2024                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
2025                                        LL_MAX_BLKSIZE_BITS);
2026         else
2027                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2028
2029         if (body->mbo_valid & OBD_MD_FLUID)
2030                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2031         if (body->mbo_valid & OBD_MD_FLGID)
2032                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2033         if (body->mbo_valid & OBD_MD_FLPROJID)
2034                 lli->lli_projid = body->mbo_projid;
2035         if (body->mbo_valid & OBD_MD_FLNLINK)
2036                 set_nlink(inode, body->mbo_nlink);
2037         if (body->mbo_valid & OBD_MD_FLRDEV)
2038                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2039
2040         if (body->mbo_valid & OBD_MD_FLID) {
2041                 /* FID shouldn't be changed! */
2042                 if (fid_is_sane(&lli->lli_fid)) {
2043                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2044                                  "Trying to change FID "DFID
2045                                  " to the "DFID", inode "DFID"(%p)\n",
2046                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2047                                  PFID(ll_inode2fid(inode)), inode);
2048                 } else {
2049                         lli->lli_fid = body->mbo_fid1;
2050                 }
2051         }
2052
2053         LASSERT(fid_seq(&lli->lli_fid) != 0);
2054
2055         if (body->mbo_valid & OBD_MD_FLSIZE) {
2056                 i_size_write(inode, body->mbo_size);
2057
2058                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2059                        PFID(ll_inode2fid(inode)),
2060                        (unsigned long long)body->mbo_size);
2061
2062                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2063                         inode->i_blocks = body->mbo_blocks;
2064         }
2065
2066         if (body->mbo_valid & OBD_MD_TSTATE) {
2067                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2068                  * clear it when done to ensure to start again
2069                  * glimpsing updated attrs
2070                  */
2071                 if (body->mbo_t_state & MS_RESTORE)
2072                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2073                 else
2074                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2075         }
2076
2077         return 0;
2078 }
2079
2080 int ll_read_inode2(struct inode *inode, void *opaque)
2081 {
2082         struct lustre_md *md = opaque;
2083         struct ll_inode_info *lli = ll_i2info(inode);
2084         int     rc;
2085         ENTRY;
2086
2087         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2088                PFID(&lli->lli_fid), inode);
2089
2090         /* Core attributes from the MDS first.  This is a new inode, and
2091          * the VFS doesn't zero times in the core inode so we have to do
2092          * it ourselves.  They will be overwritten by either MDS or OST
2093          * attributes - we just need to make sure they aren't newer.
2094          */
2095         inode->i_mtime.tv_sec = 0;
2096         inode->i_atime.tv_sec = 0;
2097         inode->i_ctime.tv_sec = 0;
2098         inode->i_rdev = 0;
2099         rc = ll_update_inode(inode, md);
2100         if (rc != 0)
2101                 RETURN(rc);
2102
2103         /* OIDEBUG(inode); */
2104
2105 #ifdef HAVE_BACKING_DEV_INFO
2106         /* initializing backing dev info. */
2107         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2108 #endif
2109         if (S_ISREG(inode->i_mode)) {
2110                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2111                 inode->i_op = &ll_file_inode_operations;
2112                 inode->i_fop = sbi->ll_fop;
2113                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2114                 EXIT;
2115         } else if (S_ISDIR(inode->i_mode)) {
2116                 inode->i_op = &ll_dir_inode_operations;
2117                 inode->i_fop = &ll_dir_operations;
2118                 EXIT;
2119         } else if (S_ISLNK(inode->i_mode)) {
2120                 inode->i_op = &ll_fast_symlink_inode_operations;
2121                 EXIT;
2122         } else {
2123                 inode->i_op = &ll_special_inode_operations;
2124
2125                 init_special_inode(inode, inode->i_mode,
2126                                    inode->i_rdev);
2127
2128                 EXIT;
2129         }
2130
2131         return 0;
2132 }
2133
2134 void ll_delete_inode(struct inode *inode)
2135 {
2136         struct ll_inode_info *lli = ll_i2info(inode);
2137         struct address_space *mapping = &inode->i_data;
2138         unsigned long nrpages;
2139         ENTRY;
2140
2141         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2142                 /* It is last chance to write out dirty pages,
2143                  * otherwise we may lose data while umount.
2144                  *
2145                  * If i_nlink is 0 then just discard data. This is safe because
2146                  * local inode gets i_nlink 0 from server only for the last
2147                  * unlink, so that file is not opened somewhere else
2148                  */
2149                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2150                                    CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2151         }
2152         truncate_inode_pages_final(mapping);
2153
2154         /* Workaround for LU-118: Note nrpages may not be totally updated when
2155          * truncate_inode_pages() returns, as there can be a page in the process
2156          * of deletion (inside __delete_from_page_cache()) in the specified
2157          * range. Thus mapping->nrpages can be non-zero when this function
2158          * returns even after truncation of the whole mapping.  Only do this if
2159          * npages isn't already zero.
2160          */
2161         nrpages = mapping->nrpages;
2162         if (nrpages) {
2163                 xa_lock_irq(&mapping->i_pages);
2164                 nrpages = mapping->nrpages;
2165                 xa_unlock_irq(&mapping->i_pages);
2166         } /* Workaround end */
2167
2168         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2169                  "see https://jira.whamcloud.com/browse/LU-118\n",
2170                  ll_i2sbi(inode)->ll_fsname,
2171                  PFID(ll_inode2fid(inode)), inode, nrpages);
2172
2173 #ifdef HAVE_SBOPS_EVICT_INODE
2174         ll_clear_inode(inode);
2175 #endif
2176         clear_inode(inode);
2177
2178         EXIT;
2179 }
2180
2181 int ll_iocontrol(struct inode *inode, struct file *file,
2182                  unsigned int cmd, unsigned long arg)
2183 {
2184         struct ll_sb_info *sbi = ll_i2sbi(inode);
2185         struct ptlrpc_request *req = NULL;
2186         int rc, flags = 0;
2187         ENTRY;
2188
2189         switch (cmd) {
2190         case FS_IOC_GETFLAGS: {
2191                 struct mdt_body *body;
2192                 struct md_op_data *op_data;
2193
2194                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2195                                              0, 0, LUSTRE_OPC_ANY,
2196                                              NULL);
2197                 if (IS_ERR(op_data))
2198                         RETURN(PTR_ERR(op_data));
2199
2200                 op_data->op_valid = OBD_MD_FLFLAGS;
2201                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2202                 ll_finish_md_op_data(op_data);
2203                 if (rc) {
2204                         CERROR("%s: failure inode "DFID": rc = %d\n",
2205                                sbi->ll_md_exp->exp_obd->obd_name,
2206                                PFID(ll_inode2fid(inode)), rc);
2207                         RETURN(-abs(rc));
2208                 }
2209
2210                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2211
2212                 flags = body->mbo_flags;
2213
2214                 ptlrpc_req_finished(req);
2215
2216                 RETURN(put_user(flags, (int __user *)arg));
2217         }
2218         case FS_IOC_SETFLAGS: {
2219                 struct iattr *attr;
2220                 struct md_op_data *op_data;
2221                 struct cl_object *obj;
2222                 struct fsxattr fa = { 0 };
2223
2224                 if (get_user(flags, (int __user *)arg))
2225                         RETURN(-EFAULT);
2226
2227                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2228                 if (flags & LUSTRE_PROJINHERIT_FL)
2229                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2230
2231                 rc = ll_ioctl_check_project(inode, &fa);
2232                 if (rc)
2233                         RETURN(rc);
2234
2235                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2236                                              LUSTRE_OPC_ANY, NULL);
2237                 if (IS_ERR(op_data))
2238                         RETURN(PTR_ERR(op_data));
2239
2240                 op_data->op_attr_flags = flags;
2241                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2242                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2243                 ll_finish_md_op_data(op_data);
2244                 ptlrpc_req_finished(req);
2245                 if (rc)
2246                         RETURN(rc);
2247
2248                 ll_update_inode_flags(inode, flags);
2249
2250                 obj = ll_i2info(inode)->lli_clob;
2251                 if (obj == NULL)
2252                         RETURN(0);
2253
2254                 OBD_ALLOC_PTR(attr);
2255                 if (attr == NULL)
2256                         RETURN(-ENOMEM);
2257
2258                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2259
2260                 OBD_FREE_PTR(attr);
2261                 RETURN(rc);
2262         }
2263         default:
2264                 RETURN(-ENOSYS);
2265         }
2266
2267         RETURN(0);
2268 }
2269
2270 int ll_flush_ctx(struct inode *inode)
2271 {
2272         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2273
2274         CDEBUG(D_SEC, "flush context for user %d\n",
2275                from_kuid(&init_user_ns, current_uid()));
2276
2277         obd_set_info_async(NULL, sbi->ll_md_exp,
2278                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2279                            0, NULL, NULL);
2280         obd_set_info_async(NULL, sbi->ll_dt_exp,
2281                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2282                            0, NULL, NULL);
2283         return 0;
2284 }
2285
2286 /* umount -f client means force down, don't save state */
2287 void ll_umount_begin(struct super_block *sb)
2288 {
2289         struct ll_sb_info *sbi = ll_s2sbi(sb);
2290         struct obd_device *obd;
2291         struct obd_ioctl_data *ioc_data;
2292         struct l_wait_info lwi;
2293         wait_queue_head_t waitq;
2294         ENTRY;
2295
2296         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2297                sb->s_count, atomic_read(&sb->s_active));
2298
2299         obd = class_exp2obd(sbi->ll_md_exp);
2300         if (obd == NULL) {
2301                 CERROR("Invalid MDC connection handle %#llx\n",
2302                        sbi->ll_md_exp->exp_handle.h_cookie);
2303                 EXIT;
2304                 return;
2305         }
2306         obd->obd_force = 1;
2307
2308         obd = class_exp2obd(sbi->ll_dt_exp);
2309         if (obd == NULL) {
2310                 CERROR("Invalid LOV connection handle %#llx\n",
2311                        sbi->ll_dt_exp->exp_handle.h_cookie);
2312                 EXIT;
2313                 return;
2314         }
2315         obd->obd_force = 1;
2316
2317         OBD_ALLOC_PTR(ioc_data);
2318         if (ioc_data) {
2319                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2320                               sizeof *ioc_data, ioc_data, NULL);
2321
2322                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2323                               sizeof *ioc_data, ioc_data, NULL);
2324
2325                 OBD_FREE_PTR(ioc_data);
2326         }
2327
2328         /* Really, we'd like to wait until there are no requests outstanding,
2329          * and then continue.  For now, we just periodically checking for vfs
2330          * to decrement mnt_cnt and hope to finish it within 10sec.
2331          */
2332         init_waitqueue_head(&waitq);
2333         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2334                                    cfs_time_seconds(1), NULL, NULL);
2335         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2336
2337         EXIT;
2338 }
2339
2340 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2341 {
2342         struct ll_sb_info *sbi = ll_s2sbi(sb);
2343         char *profilenm = get_profile_name(sb);
2344         int err;
2345         __u32 read_only;
2346
2347         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2348                 read_only = *flags & MS_RDONLY;
2349                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2350                                          sizeof(KEY_READ_ONLY),
2351                                          KEY_READ_ONLY, sizeof(read_only),
2352                                          &read_only, NULL);
2353                 if (err) {
2354                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2355                                       profilenm, read_only ?
2356                                       "read-only" : "read-write", err);
2357                         return err;
2358                 }
2359
2360                 if (read_only)
2361                         sb->s_flags |= MS_RDONLY;
2362                 else
2363                         sb->s_flags &= ~MS_RDONLY;
2364
2365                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2366                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2367                                       read_only ?  "read-only" : "read-write");
2368         }
2369         return 0;
2370 }
2371
2372 /**
2373  * Cleanup the open handle that is cached on MDT-side.
2374  *
2375  * For open case, the client side open handling thread may hit error
2376  * after the MDT grant the open. Under such case, the client should
2377  * send close RPC to the MDT as cleanup; otherwise, the open handle
2378  * on the MDT will be leaked there until the client umount or evicted.
2379  *
2380  * In further, if someone unlinked the file, because the open handle
2381  * holds the reference on such file/object, then it will block the
2382  * subsequent threads that want to locate such object via FID.
2383  *
2384  * \param[in] sb        super block for this file-system
2385  * \param[in] open_req  pointer to the original open request
2386  */
2387 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2388 {
2389         struct mdt_body                 *body;
2390         struct md_op_data               *op_data;
2391         struct ptlrpc_request           *close_req = NULL;
2392         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2393         ENTRY;
2394
2395         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2396         OBD_ALLOC_PTR(op_data);
2397         if (op_data == NULL) {
2398                 CWARN("%s: cannot allocate op_data to release open handle for "
2399                       DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2400
2401                 RETURN_EXIT;
2402         }
2403
2404         op_data->op_fid1 = body->mbo_fid1;
2405         op_data->op_open_handle = body->mbo_open_handle;
2406         op_data->op_mod_time = ktime_get_real_seconds();
2407         md_close(exp, op_data, NULL, &close_req);
2408         ptlrpc_req_finished(close_req);
2409         ll_finish_md_op_data(op_data);
2410
2411         EXIT;
2412 }
2413
2414 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2415                   struct super_block *sb, struct lookup_intent *it)
2416 {
2417         struct ll_sb_info *sbi = NULL;
2418         struct lustre_md md = { NULL };
2419         int rc;
2420         ENTRY;
2421
2422         LASSERT(*inode || sb);
2423         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2424         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2425                               sbi->ll_md_exp, &md);
2426         if (rc != 0)
2427                 GOTO(out, rc);
2428
2429         if (*inode) {
2430                 rc = ll_update_inode(*inode, &md);
2431                 if (rc != 0)
2432                         GOTO(out, rc);
2433         } else {
2434                 LASSERT(sb != NULL);
2435
2436                 /*
2437                  * At this point server returns to client's same fid as client
2438                  * generated for creating. So using ->fid1 is okay here.
2439                  */
2440                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2441                         CERROR("%s: Fid is insane "DFID"\n",
2442                                 sbi->ll_fsname,
2443                                 PFID(&md.body->mbo_fid1));
2444                         GOTO(out, rc = -EINVAL);
2445                 }
2446
2447                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2448                                              sbi->ll_flags & LL_SBI_32BIT_API),
2449                                  &md);
2450                 if (IS_ERR(*inode)) {
2451 #ifdef CONFIG_FS_POSIX_ACL
2452                         if (md.posix_acl) {
2453                                 posix_acl_release(md.posix_acl);
2454                                 md.posix_acl = NULL;
2455                         }
2456 #endif
2457                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2458                         *inode = NULL;
2459                         CERROR("new_inode -fatal: rc %d\n", rc);
2460                         GOTO(out, rc);
2461                 }
2462         }
2463
2464         /* Handling piggyback layout lock.
2465          * Layout lock can be piggybacked by getattr and open request.
2466          * The lsm can be applied to inode only if it comes with a layout lock
2467          * otherwise correct layout may be overwritten, for example:
2468          * 1. proc1: mdt returns a lsm but not granting layout
2469          * 2. layout was changed by another client
2470          * 3. proc2: refresh layout and layout lock granted
2471          * 4. proc1: to apply a stale layout */
2472         if (it != NULL && it->it_lock_mode != 0) {
2473                 struct lustre_handle lockh;
2474                 struct ldlm_lock *lock;
2475
2476                 lockh.cookie = it->it_lock_handle;
2477                 lock = ldlm_handle2lock(&lockh);
2478                 LASSERT(lock != NULL);
2479                 if (ldlm_has_layout(lock)) {
2480                         struct cl_object_conf conf;
2481
2482                         memset(&conf, 0, sizeof(conf));
2483                         conf.coc_opc = OBJECT_CONF_SET;
2484                         conf.coc_inode = *inode;
2485                         conf.coc_lock = lock;
2486                         conf.u.coc_layout = md.layout;
2487                         (void)ll_layout_conf(*inode, &conf);
2488                 }
2489                 LDLM_LOCK_PUT(lock);
2490         }
2491
2492         GOTO(out, rc = 0);
2493
2494 out:
2495         /* cleanup will be done if necessary */
2496         md_free_lustre_md(sbi->ll_md_exp, &md);
2497
2498         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2499                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2500
2501         return rc;
2502 }
2503
2504 int ll_obd_statfs(struct inode *inode, void __user *arg)
2505 {
2506         struct ll_sb_info *sbi = NULL;
2507         struct obd_export *exp;
2508         char *buf = NULL;
2509         struct obd_ioctl_data *data = NULL;
2510         __u32 type;
2511         int len = 0, rc;
2512
2513         if (!inode || !(sbi = ll_i2sbi(inode)))
2514                 GOTO(out_statfs, rc = -EINVAL);
2515
2516         rc = obd_ioctl_getdata(&buf, &len, arg);
2517         if (rc)
2518                 GOTO(out_statfs, rc);
2519
2520         data = (void*)buf;
2521         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2522             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2523                 GOTO(out_statfs, rc = -EINVAL);
2524
2525         if (data->ioc_inllen1 != sizeof(__u32) ||
2526             data->ioc_inllen2 != sizeof(__u32) ||
2527             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2528             data->ioc_plen2 != sizeof(struct obd_uuid))
2529                 GOTO(out_statfs, rc = -EINVAL);
2530
2531         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2532         if (type & LL_STATFS_LMV)
2533                 exp = sbi->ll_md_exp;
2534         else if (type & LL_STATFS_LOV)
2535                 exp = sbi->ll_dt_exp;
2536         else
2537                 GOTO(out_statfs, rc = -ENODEV);
2538
2539         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2540         if (rc)
2541                 GOTO(out_statfs, rc);
2542 out_statfs:
2543         OBD_FREE_LARGE(buf, len);
2544         return rc;
2545 }
2546
2547 /*
2548  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2549  * be called early to avoid deadlock.
2550  */
2551 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2552 {
2553         if (op_data->op_mea2_sem) {
2554                 up_read(op_data->op_mea2_sem);
2555                 op_data->op_mea2_sem = NULL;
2556         }
2557
2558         if (op_data->op_mea1_sem) {
2559                 up_read(op_data->op_mea1_sem);
2560                 op_data->op_mea1_sem = NULL;
2561         }
2562 }
2563
2564 /* this function prepares md_op_data hint for passing it down to MD stack. */
2565 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2566                                       struct inode *i1, struct inode *i2,
2567                                       const char *name, size_t namelen,
2568                                       __u32 mode, __u32 opc, void *data)
2569 {
2570         LASSERT(i1 != NULL);
2571
2572         if (name == NULL) {
2573                 /* Do not reuse namelen for something else. */
2574                 if (namelen != 0)
2575                         return ERR_PTR(-EINVAL);
2576         } else {
2577                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2578                         return ERR_PTR(-ENAMETOOLONG);
2579
2580                 if (!lu_name_is_valid_2(name, namelen))
2581                         return ERR_PTR(-EINVAL);
2582         }
2583
2584         if (op_data == NULL)
2585                 OBD_ALLOC_PTR(op_data);
2586
2587         if (op_data == NULL)
2588                 return ERR_PTR(-ENOMEM);
2589
2590         ll_i2gids(op_data->op_suppgids, i1, i2);
2591         op_data->op_fid1 = *ll_inode2fid(i1);
2592         op_data->op_default_stripe_offset = -1;
2593
2594         if (S_ISDIR(i1->i_mode)) {
2595                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2596                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2597                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2598                 if (opc == LUSTRE_OPC_MKDIR)
2599                         op_data->op_default_stripe_offset =
2600                                    ll_i2info(i1)->lli_def_stripe_offset;
2601         }
2602
2603         if (i2) {
2604                 op_data->op_fid2 = *ll_inode2fid(i2);
2605                 if (S_ISDIR(i2->i_mode)) {
2606                         if (i2 != i1) {
2607                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2608                                 op_data->op_mea2_sem =
2609                                                 &ll_i2info(i2)->lli_lsm_sem;
2610                         }
2611                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2612                 }
2613         } else {
2614                 fid_zero(&op_data->op_fid2);
2615         }
2616
2617         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2618                 op_data->op_cli_flags |= CLI_HASH64;
2619
2620         if (ll_need_32bit_api(ll_i2sbi(i1)))
2621                 op_data->op_cli_flags |= CLI_API32;
2622
2623         op_data->op_name = name;
2624         op_data->op_namelen = namelen;
2625         op_data->op_mode = mode;
2626         op_data->op_mod_time = ktime_get_real_seconds();
2627         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2628         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2629         op_data->op_cap = cfs_curproc_cap_pack();
2630         op_data->op_mds = 0;
2631         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2632              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2633                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2634         }
2635         op_data->op_data = data;
2636
2637         return op_data;
2638 }
2639
2640 void ll_finish_md_op_data(struct md_op_data *op_data)
2641 {
2642         ll_unlock_md_op_lsm(op_data);
2643         security_release_secctx(op_data->op_file_secctx,
2644                                 op_data->op_file_secctx_size);
2645         OBD_FREE_PTR(op_data);
2646 }
2647
2648 #ifdef HAVE_SUPEROPS_USE_DENTRY
2649 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2650 #else
2651 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2652 #endif
2653 {
2654         struct ll_sb_info *sbi;
2655
2656 #ifdef HAVE_SUPEROPS_USE_DENTRY
2657         LASSERT((seq != NULL) && (dentry != NULL));
2658         sbi = ll_s2sbi(dentry->d_sb);
2659 #else
2660         LASSERT((seq != NULL) && (vfs != NULL));
2661         sbi = ll_s2sbi(vfs->mnt_sb);
2662 #endif
2663
2664         if (sbi->ll_flags & LL_SBI_NOLCK)
2665                 seq_puts(seq, ",nolock");
2666
2667         if (sbi->ll_flags & LL_SBI_FLOCK)
2668                 seq_puts(seq, ",flock");
2669
2670         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2671                 seq_puts(seq, ",localflock");
2672
2673         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2674                 seq_puts(seq, ",user_xattr");
2675
2676         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2677                 seq_puts(seq, ",lazystatfs");
2678
2679         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2680                 seq_puts(seq, ",user_fid2path");
2681
2682         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2683                 seq_puts(seq, ",always_ping");
2684
2685         RETURN(0);
2686 }
2687
2688 /**
2689  * Get obd name by cmd, and copy out to user space
2690  */
2691 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2692 {
2693         struct ll_sb_info *sbi = ll_i2sbi(inode);
2694         struct obd_device *obd;
2695         ENTRY;
2696
2697         if (cmd == OBD_IOC_GETDTNAME)
2698                 obd = class_exp2obd(sbi->ll_dt_exp);
2699         else if (cmd == OBD_IOC_GETMDNAME)
2700                 obd = class_exp2obd(sbi->ll_md_exp);
2701         else
2702                 RETURN(-EINVAL);
2703
2704         if (!obd)
2705                 RETURN(-ENOENT);
2706
2707         if (copy_to_user((void __user *)arg, obd->obd_name,
2708                          strlen(obd->obd_name) + 1))
2709                 RETURN(-EFAULT);
2710
2711         RETURN(0);
2712 }
2713
2714 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2715 {
2716         char *path = NULL;
2717
2718         struct path p;
2719
2720         p.dentry = dentry;
2721         p.mnt = current->fs->root.mnt;
2722         path_get(&p);
2723         path = d_path(&p, buf, bufsize);
2724         path_put(&p);
2725         return path;
2726 }
2727
2728 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2729 {
2730         char *buf, *path = NULL;
2731         struct dentry *dentry = NULL;
2732         struct inode *inode = page->mapping->host;
2733
2734         /* this can be called inside spin lock so use GFP_ATOMIC. */
2735         buf = (char *)__get_free_page(GFP_ATOMIC);
2736         if (buf != NULL) {
2737                 dentry = d_find_alias(page->mapping->host);
2738                 if (dentry != NULL)
2739                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2740         }
2741
2742         CDEBUG(D_WARNING,
2743                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2744                "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
2745                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2746                PFID(ll_inode2fid(inode)),
2747                (path && !IS_ERR(path)) ? path : "", ioret);
2748
2749         if (dentry != NULL)
2750                 dput(dentry);
2751
2752         if (buf != NULL)
2753                 free_page((unsigned long)buf);
2754 }
2755
2756 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2757                         struct lov_user_md **kbuf)
2758 {
2759         struct lov_user_md      lum;
2760         ssize_t                 lum_size;
2761         ENTRY;
2762
2763         if (copy_from_user(&lum, md, sizeof(lum)))
2764                 RETURN(-EFAULT);
2765
2766         lum_size = ll_lov_user_md_size(&lum);
2767         if (lum_size < 0)
2768                 RETURN(lum_size);
2769
2770         OBD_ALLOC(*kbuf, lum_size);
2771         if (*kbuf == NULL)
2772                 RETURN(-ENOMEM);
2773
2774         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2775                 OBD_FREE(*kbuf, lum_size);
2776                 RETURN(-EFAULT);
2777         }
2778
2779         RETURN(lum_size);
2780 }
2781
2782 /*
2783  * Compute llite root squash state after a change of root squash
2784  * configuration setting or add/remove of a lnet nid
2785  */
2786 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2787 {
2788         struct root_squash_info *squash = &sbi->ll_squash;
2789         int i;
2790         bool matched;
2791         struct lnet_process_id id;
2792
2793         /* Update norootsquash flag */
2794         down_write(&squash->rsi_sem);
2795         if (list_empty(&squash->rsi_nosquash_nids))
2796                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2797         else {
2798                 /* Do not apply root squash as soon as one of our NIDs is
2799                  * in the nosquash_nids list */
2800                 matched = false;
2801                 i = 0;
2802                 while (LNetGetId(i++, &id) != -ENOENT) {
2803                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2804                                 continue;
2805                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2806                                 matched = true;
2807                                 break;
2808                         }
2809                 }
2810                 if (matched)
2811                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2812                 else
2813                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2814         }
2815         up_write(&squash->rsi_sem);
2816 }
2817
2818 /**
2819  * Parse linkea content to extract information about a given hardlink
2820  *
2821  * \param[in]   ldata      - Initialized linkea data
2822  * \param[in]   linkno     - Link identifier
2823  * \param[out]  parent_fid - The entry's parent FID
2824  * \param[out]  ln         - Entry name destination buffer
2825  *
2826  * \retval 0 on success
2827  * \retval Appropriate negative error code on failure
2828  */
2829 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2830                             struct lu_fid *parent_fid, struct lu_name *ln)
2831 {
2832         unsigned int    idx;
2833         int             rc;
2834         ENTRY;
2835
2836         rc = linkea_init_with_rec(ldata);
2837         if (rc < 0)
2838                 RETURN(rc);
2839
2840         if (linkno >= ldata->ld_leh->leh_reccount)
2841                 /* beyond last link */
2842                 RETURN(-ENODATA);
2843
2844         linkea_first_entry(ldata);
2845         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2846                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2847                                     parent_fid);
2848                 if (idx == linkno)
2849                         break;
2850
2851                 linkea_next_entry(ldata);
2852         }
2853
2854         if (idx < linkno)
2855                 RETURN(-ENODATA);
2856
2857         RETURN(0);
2858 }
2859
2860 /**
2861  * Get parent FID and name of an identified link. Operation is performed for
2862  * a given link number, letting the caller iterate over linkno to list one or
2863  * all links of an entry.
2864  *
2865  * \param[in]     file - File descriptor against which to perform the operation
2866  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2867  *                       on and the available size. It is eventually filled with
2868  *                       the requested information or left untouched on error
2869  *
2870  * \retval - 0 on success
2871  * \retval - Appropriate negative error code on failure
2872  */
2873 int ll_getparent(struct file *file, struct getparent __user *arg)
2874 {
2875         struct inode            *inode = file_inode(file);
2876         struct linkea_data      *ldata;
2877         struct lu_buf            buf = LU_BUF_NULL;
2878         struct lu_name           ln;
2879         struct lu_fid            parent_fid;
2880         __u32                    linkno;
2881         __u32                    name_size;
2882         int                      rc;
2883
2884         ENTRY;
2885
2886         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2887             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2888                 RETURN(-EPERM);
2889
2890         if (get_user(name_size, &arg->gp_name_size))
2891                 RETURN(-EFAULT);
2892
2893         if (get_user(linkno, &arg->gp_linkno))
2894                 RETURN(-EFAULT);
2895
2896         if (name_size > PATH_MAX)
2897                 RETURN(-EINVAL);
2898
2899         OBD_ALLOC(ldata, sizeof(*ldata));
2900         if (ldata == NULL)
2901                 RETURN(-ENOMEM);
2902
2903         rc = linkea_data_new(ldata, &buf);
2904         if (rc < 0)
2905                 GOTO(ldata_free, rc);
2906
2907 #ifdef HAVE_XATTR_HANDLER_FLAGS
2908         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2909                            buf.lb_len, OBD_MD_FLXATTR);
2910 #else
2911         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2912                          buf.lb_len);
2913 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2914         if (rc < 0)
2915                 GOTO(lb_free, rc);
2916
2917         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2918         if (rc < 0)
2919                 GOTO(lb_free, rc);
2920
2921         if (ln.ln_namelen >= name_size)
2922                 GOTO(lb_free, rc = -EOVERFLOW);
2923
2924         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2925                 GOTO(lb_free, rc = -EFAULT);
2926
2927         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2928                 GOTO(lb_free, rc = -EFAULT);
2929
2930         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2931                 GOTO(lb_free, rc = -EFAULT);
2932
2933 lb_free:
2934         lu_buf_free(&buf);
2935 ldata_free:
2936         OBD_FREE(ldata, sizeof(*ldata));
2937
2938         RETURN(rc);
2939 }