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
 231 #ifdef HAVE_LRU_RESIZE_SUPPORT
 232         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 233                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 234 #endif
 235 #ifdef CONFIG_FS_POSIX_ACL
 236         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 237                                    OBD_CONNECT_LARGE_ACL;
 238 #endif
 239
 240         data->ocd_cksum_types = obd_cksum_types_supported_client();
 241
 242         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 243                 /* flag mdc connection as lightweight, only used for test
 244                  * purpose, use with care */
 245                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 246
 247         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 248         data->ocd_version = LUSTRE_VERSION_CODE;
 249
 250         if (sb->s_flags & MS_RDONLY)
 251                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 252         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 253                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 254
 255 #ifdef MS_NOSEC
 256         /* Setting this indicates we correctly support S_NOSEC (See kernel
 257          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 258          */
 259         sb->s_flags |= MS_NOSEC;
 260 #endif
 261
 262         if (sbi->ll_flags & LL_SBI_FLOCK)
 263                 sbi->ll_fop = &ll_file_operations_flock;
 264         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 265                 sbi->ll_fop = &ll_file_operations;
 266         else
 267                 sbi->ll_fop = &ll_file_operations_noflock;
 268
 269         /* always ping even if server suppress_pings */
 270         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 271                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 272
 273         obd_connect_set_secctx(data);
 274
 275 #if defined(CONFIG_SECURITY)
 276         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 277 #endif
 278
 279         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 280
 281         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 282                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 283         if (err == -EBUSY) {
 284                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 285                                    "recovery, of which this client is not a "
 286                                    "part. Please wait for recovery to complete,"
 287                                    " abort, or time out.\n", md);
 288                 GOTO(out, err);
 289         } else if (err) {
 290                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 291                 GOTO(out, err);
 292         }
 293
 294         sbi->ll_md_exp->exp_connect_data = *data;
 295
 296         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 297                            LUSTRE_SEQ_METADATA);
 298         if (err) {
 299                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 300                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 301                 GOTO(out_md, err);
 302         }
 303
 304         /* For mount, we only need fs info from MDT0, and also in DNE, it
 305          * can make sure the client can be mounted as long as MDT0 is
 306          * avaible */
 307         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 308                         ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 309                         OBD_STATFS_FOR_MDT0);
 310         if (err)
 311                 GOTO(out_md_fid, err);
 312
 313         /* This needs to be after statfs to ensure connect has finished.
 314          * Note that "data" does NOT contain the valid connect reply.
 315          * If connecting to a 1.8 server there will be no LMV device, so
 316          * we can access the MDC export directly and exp_connect_flags will
 317          * be non-zero, but if accessing an upgraded 2.1 server it will
 318          * have the correct flags filled in.
 319          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 320         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 321         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 322             valid != CLIENT_CONNECT_MDT_REQD) {
 323                 char *buf;
 324
 325                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 326                 obd_connect_flags2str(buf, PAGE_SIZE,
 327                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 328                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 329                                    "feature(s) needed for correct operation "
 330                                    "of this client (%s). Please upgrade "
 331                                    "server or downgrade client.\n",
 332                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 333                 OBD_FREE(buf, PAGE_SIZE);
 334                 GOTO(out_md_fid, err = -EPROTO);
 335         }
 336
 337         size = sizeof(*data);
 338         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 339                            KEY_CONN_DATA,  &size, data);
 340         if (err) {
 341                 CERROR("%s: Get connect data failed: rc = %d\n",
 342                        sbi->ll_md_exp->exp_obd->obd_name, err);
 343                 GOTO(out_md_fid, err);
 344         }
 345
 346         LASSERT(osfs->os_bsize);
 347         sb->s_blocksize = osfs->os_bsize;
 348         sb->s_blocksize_bits = log2(osfs->os_bsize);
 349         sb->s_magic = LL_SUPER_MAGIC;
 350         sb->s_maxbytes = MAX_LFS_FILESIZE;
 351         sbi->ll_namelen = osfs->os_namelen;
 352         sbi->ll_mnt.mnt = current->fs->root.mnt;
 353
 354         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 355             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 356                 LCONSOLE_INFO("Disabling user_xattr feature because "
 357                               "it is not supported on the server\n");
 358                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 359         }
 360
 361         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 362 #ifdef MS_POSIXACL
 363                 sb->s_flags |= MS_POSIXACL;
 364 #endif
 365                 sbi->ll_flags |= LL_SBI_ACL;
 366         } else {
 367                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 368 #ifdef MS_POSIXACL
 369                 sb->s_flags &= ~MS_POSIXACL;
 370 #endif
 371                 sbi->ll_flags &= ~LL_SBI_ACL;
 372         }
 373
 374         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 375                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 378                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 379
 380         if (obd_connect_has_secctx(data))
 381                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 382
 383         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 384                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 385                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 386                                       "unknown maximum xattr size.\n", dt);
 387                 } else if (!sbi->ll_xattr_cache_set) {
 388                         /* If xattr_cache is already set (no matter 0 or 1)
 389                          * during processing llog, it won't be enabled here. */
 390                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 391                         sbi->ll_xattr_cache_enabled = 1;
 392                 }
 393         }
 394
 395         sbi->ll_dt_obd = class_name2obd(dt);
 396         if (!sbi->ll_dt_obd) {
 397                 CERROR("DT %s: not setup or attached\n", dt);
 398                 GOTO(out_md_fid, err = -ENODEV);
 399         }
 400
 401         /* pass client page size via ocd_grant_blkbits, the server should report
 402          * back its backend blocksize for grant calculation purpose */
 403         data->ocd_grant_blkbits = PAGE_SHIFT;
 404
 405         /* indicate OST features supported by this client */
 406         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 407                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 408                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 409                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 410                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 411                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 412                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 413                                   OBD_CONNECT_EINPROGRESS |
 414                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 415                                   OBD_CONNECT_LAYOUTLOCK |
 416                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 417                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 418                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 419
 420 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 421  * can interoperate with an older version of lockahead which was released prior
 422  * to landing in master. This support will be dropped when 2.13 development
 423  * starts.  At the point, we should not just drop the connect flag (below), we
 424  * should also remove the support in the code.
 425  *
 426  * Removing it means a few things:
 427  * 1. Remove this section here
 428  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 429  * 3. Remove function exp_connect_lockahead_old
 430  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 431  * */
 432 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 433         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 434 #endif
 435
 436         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
 437
 438         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 439                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 440
 441         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 442          * disabled by default, because it can still be enabled on the
 443          * fly via /sys. As a consequence, we still need to come to an
 444          * agreement on the supported algorithms at connect time
 445          */
 446         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 447
 448         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 449                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 450         else
 451                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 452
 453 #ifdef HAVE_LRU_RESIZE_SUPPORT
 454         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 455 #endif
 456         /* always ping even if server suppress_pings */
 457         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 458                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 459
 460         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 461                "ocd_grant: %d\n", data->ocd_connect_flags,
 462                data->ocd_version, data->ocd_grant);
 463
 464         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 465         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 466
 467         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 468
 469         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 470                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 471         if (err == -EBUSY) {
 472                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 473                                    "recovery, of which this client is not a "
 474                                    "part.  Please wait for recovery to "
 475                                    "complete, abort, or time out.\n", dt);
 476                 GOTO(out_md, err);
 477         } else if (err) {
 478                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 479                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 480                 GOTO(out_md, err);
 481         }
 482
 483         sbi->ll_dt_exp->exp_connect_data = *data;
 484
 485         /* Don't change value if it was specified in the config log */
 486         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
 487                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 488                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 489                               (data->ocd_brw_size >> PAGE_SHIFT));
 490
 491         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 492                            LUSTRE_SEQ_METADATA);
 493         if (err) {
 494                 CERROR("%s: Can't init data layer FID infrastructure, "
 495                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 496                 GOTO(out_dt, err);
 497         }
 498
 499         mutex_lock(&sbi->ll_lco.lco_lock);
 500         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 501         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 502         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 503         mutex_unlock(&sbi->ll_lco.lco_lock);
 504
 505         fid_zero(&sbi->ll_root_fid);
 506         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 507                            &sbi->ll_root_fid);
 508         if (err) {
 509                 CERROR("cannot mds_connect: rc = %d\n", err);
 510                 GOTO(out_lock_cn_cb, err);
 511         }
 512         if (!fid_is_sane(&sbi->ll_root_fid)) {
 513                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 514                        sbi->ll_md_exp->exp_obd->obd_name,
 515                        PFID(&sbi->ll_root_fid));
 516                 GOTO(out_lock_cn_cb, err = -EINVAL);
 517         }
 518         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 519
 520         sb->s_op = &lustre_super_operations;
 521 #ifdef HAVE_XATTR_HANDLER_FLAGS
 522         sb->s_xattr = ll_xattr_handlers;
 523 #endif
 524 #if THREAD_SIZE >= 8192 /*b=17630*/
 525         sb->s_export_op = &lustre_export_operations;
 526 #endif
 527
 528         /* make root inode
 529          * XXX: move this to after cbd setup? */
 530         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 531         if (sbi->ll_flags & LL_SBI_ACL)
 532                 valid |= OBD_MD_FLACL;
 533
 534         OBD_ALLOC_PTR(op_data);
 535         if (op_data == NULL)
 536                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 537
 538         op_data->op_fid1 = sbi->ll_root_fid;
 539         op_data->op_mode = 0;
 540         op_data->op_valid = valid;
 541
 542         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 543
 544         OBD_FREE_PTR(op_data);
 545         if (err) {
 546                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 547                        sbi->ll_md_exp->exp_obd->obd_name, err);
 548                 GOTO(out_lock_cn_cb, err);
 549         }
 550
 551         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 552                                sbi->ll_md_exp, &lmd);
 553         if (err) {
 554                 CERROR("failed to understand root inode md: rc = %d\n", err);
 555                 ptlrpc_req_finished(request);
 556                 GOTO(out_lock_cn_cb, err);
 557         }
 558
 559         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 560         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 561                                             sbi->ll_flags & LL_SBI_32BIT_API),
 562                        &lmd);
 563         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 564         ptlrpc_req_finished(request);
 565
 566         if (IS_ERR(root)) {
 567 #ifdef CONFIG_FS_POSIX_ACL
 568                 if (lmd.posix_acl) {
 569                         posix_acl_release(lmd.posix_acl);
 570                         lmd.posix_acl = NULL;
 571                 }
 572 #endif
 573                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 574                 root = NULL;
 575                 CERROR("lustre_lite: bad iget4 for root\n");
 576                 GOTO(out_root, err);
 577         }
 578
 579         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 580         if (sbi->ll_checksum_set) {
 581                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 582                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 583                                          sizeof(checksum), &checksum, NULL);
 584                 if (err) {
 585                         CERROR("%s: Set checksum failed: rc = %d\n",
 586                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 587                         GOTO(out_root, err);
 588                 }
 589         }
 590         cl_sb_init(sb);
 591
 592         sb->s_root = d_make_root(root);
 593         if (sb->s_root == NULL) {
 594                 err = -ENOMEM;
 595                 CERROR("%s: can't make root dentry: rc = %d\n",
 596                        sbi->ll_fsname, err);
 597                 GOTO(out_root, err);
 598         }
 599 #ifdef HAVE_DCACHE_LOCK
 600         sb->s_root->d_op = &ll_d_ops;
 601 #endif
 602
 603         sbi->ll_sdev_orig = sb->s_dev;
 604
 605         /* We set sb->s_dev equal on all lustre clients in order to support
 606          * NFS export clustering.  NFSD requires that the FSID be the same
 607          * on all clients. */
 608         /* s_dev is also used in lt_compare() to compare two fs, but that is
 609          * only a node-local comparison. */
 610         uuid = obd_get_uuid(sbi->ll_md_exp);
 611         if (uuid != NULL)
 612                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 613
 614         if (data != NULL)
 615                 OBD_FREE_PTR(data);
 616         if (osfs != NULL)
 617                 OBD_FREE_PTR(osfs);
 618
 619         if (sbi->ll_dt_obd) {
 620                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 621                                         &sbi->ll_dt_obd->obd_kset.kobj,
 622                                         sbi->ll_dt_obd->obd_type->typ_name);
 623                 if (err < 0) {
 624                         CERROR("%s: could not register %s in llite: rc = %d\n",
 625                                dt, sbi->ll_fsname, err);
 626                         err = 0;
 627                 }
 628         }
 629
 630         if (sbi->ll_md_obd) {
 631                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 632                                         &sbi->ll_md_obd->obd_kset.kobj,
 633                                         sbi->ll_md_obd->obd_type->typ_name);
 634                 if (err < 0) {
 635                         CERROR("%s: could not register %s in llite: rc = %d\n",
 636                                md, sbi->ll_fsname, err);
 637                         err = 0;
 638                 }
 639         }
 640
 641         RETURN(err);
 642 out_root:
 643         if (root)
 644                 iput(root);
 645 out_lock_cn_cb:
 646         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 647 out_dt:
 648         obd_disconnect(sbi->ll_dt_exp);
 649         sbi->ll_dt_exp = NULL;
 650         sbi->ll_dt_obd = NULL;
 651 out_md_fid:
 652         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 653 out_md:
 654         obd_disconnect(sbi->ll_md_exp);
 655         sbi->ll_md_exp = NULL;
 656         sbi->ll_md_obd = NULL;
 657 out:
 658         if (data != NULL)
 659                 OBD_FREE_PTR(data);
 660         if (osfs != NULL)
 661                 OBD_FREE_PTR(osfs);
 662         return err;
 663 }
 664
 665 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 666 {
 667         int size, rc;
 668
 669         size = sizeof(*lmmsize);
 670         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 671                           KEY_MAX_EASIZE, &size, lmmsize);
 672         if (rc != 0) {
 673                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 674                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 675                 RETURN(rc);
 676         }
 677
 678         CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
 679
 680         size = sizeof(int);
 681         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 682                           KEY_MAX_EASIZE, &size, lmmsize);
 683         if (rc)
 684                 CERROR("Get max mdsize error rc %d\n", rc);
 685
 686         CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
 687
 688         RETURN(rc);
 689 }
 690
 691 /**
 692  * Get the value of the default_easize parameter.
 693  *
 694  * \see client_obd::cl_default_mds_easize
 695  *
 696  * \param[in] sbi       superblock info for this filesystem
 697  * \param[out] lmmsize  pointer to storage location for value
 698  *
 699  * \retval 0            on success
 700  * \retval negative     negated errno on failure
 701  */
 702 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 703 {
 704         int size, rc;
 705
 706         size = sizeof(int);
 707         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 708                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 709         if (rc)
 710                 CERROR("Get default mdsize error rc %d\n", rc);
 711
 712         RETURN(rc);
 713 }
 714
 715 /**
 716  * Set the default_easize parameter to the given value.
 717  *
 718  * \see client_obd::cl_default_mds_easize
 719  *
 720  * \param[in] sbi       superblock info for this filesystem
 721  * \param[in] lmmsize   the size to set
 722  *
 723  * \retval 0            on success
 724  * \retval negative     negated errno on failure
 725  */
 726 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 727 {
 728         int rc;
 729
 730         if (lmmsize < sizeof(struct lov_mds_md) ||
 731             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 732                 return -EINVAL;
 733
 734         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 735                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 736                                 sizeof(int), &lmmsize, NULL);
 737
 738         RETURN(rc);
 739 }
 740
 741 static void client_common_put_super(struct super_block *sb)
 742 {
 743         struct ll_sb_info *sbi = ll_s2sbi(sb);
 744         ENTRY;
 745
 746         cl_sb_fini(sb);
 747
 748         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 749         obd_disconnect(sbi->ll_dt_exp);
 750         sbi->ll_dt_exp = NULL;
 751
 752         ll_debugfs_unregister_super(sb);
 753
 754         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 755         obd_disconnect(sbi->ll_md_exp);
 756         sbi->ll_md_exp = NULL;
 757
 758         EXIT;
 759 }
 760
 761 void ll_kill_super(struct super_block *sb)
 762 {
 763         struct ll_sb_info *sbi;
 764         ENTRY;
 765
 766         /* not init sb ?*/
 767         if (!(sb->s_flags & MS_ACTIVE))
 768                 return;
 769
 770         sbi = ll_s2sbi(sb);
 771         /* we need restore s_dev from changed for clustred NFS before put_super
 772          * because new kernels have cached s_dev and change sb->s_dev in
 773          * put_super not affected real removing devices */
 774         if (sbi) {
 775                 sb->s_dev = sbi->ll_sdev_orig;
 776                 sbi->ll_umounting = 1;
 777
 778                 /* wait running statahead threads to quit */
 779                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 780                         set_current_state(TASK_UNINTERRUPTIBLE);
 781                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 782                 }
 783         }
 784
 785         EXIT;
 786 }
 787
 788 static inline int ll_set_opt(const char *opt, char *data, int fl)
 789 {
 790         if (strncmp(opt, data, strlen(opt)) != 0)
 791                 return 0;
 792         else
 793                 return fl;
 794 }
 795
 796 /* non-client-specific mount options are parsed in lmd_parse */
 797 static int ll_options(char *options, struct ll_sb_info *sbi)
 798 {
 799         int tmp;
 800         char *s1 = options, *s2;
 801         int *flags = &sbi->ll_flags;
 802         ENTRY;
 803
 804         if (!options)
 805                 RETURN(0);
 806
 807         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 808
 809         while (*s1) {
 810                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 811                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 812                 if (tmp) {
 813                         *flags |= tmp;
 814                         goto next;
 815                 }
 816                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 817                 if (tmp) {
 818                         *flags |= tmp;
 819                         goto next;
 820                 }
 821                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 822                 if (tmp) {
 823                         *flags |= tmp;
 824                         goto next;
 825                 }
 826                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 827                 if (tmp) {
 828                         *flags &= ~tmp;
 829                         goto next;
 830                 }
 831                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 832                 if (tmp) {
 833                         *flags |= tmp;
 834                         goto next;
 835                 }
 836                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 837                 if (tmp) {
 838                         *flags &= ~tmp;
 839                         goto next;
 840                 }
 841                 tmp = ll_set_opt("context", s1, 1);
 842                 if (tmp)
 843                         goto next;
 844                 tmp = ll_set_opt("fscontext", s1, 1);
 845                 if (tmp)
 846                         goto next;
 847                 tmp = ll_set_opt("defcontext", s1, 1);
 848                 if (tmp)
 849                         goto next;
 850                 tmp = ll_set_opt("rootcontext", s1, 1);
 851                 if (tmp)
 852                         goto next;
 853                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 854                 if (tmp) {
 855                         *flags |= tmp;
 856                         goto next;
 857                 }
 858                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 859                 if (tmp) {
 860                         *flags &= ~tmp;
 861                         goto next;
 862                 }
 863
 864                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         sbi->ll_checksum_set = 1;
 868                         goto next;
 869                 }
 870                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 871                 if (tmp) {
 872                         *flags &= ~tmp;
 873                         sbi->ll_checksum_set = 1;
 874                         goto next;
 875                 }
 876                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 877                 if (tmp) {
 878                         *flags |= tmp;
 879                         goto next;
 880                 }
 881                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 882                 if (tmp) {
 883                         *flags &= ~tmp;
 884                         goto next;
 885                 }
 886                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 887                 if (tmp) {
 888                         *flags |= tmp;
 889                         goto next;
 890                 }
 891                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 892                 if (tmp) {
 893                         *flags &= ~tmp;
 894                         goto next;
 895                 }
 896                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 897                 if (tmp) {
 898                         *flags |= tmp;
 899                         goto next;
 900                 }
 901                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 902                 if (tmp) {
 903                         *flags |= tmp;
 904                         goto next;
 905                 }
 906                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 907                 if (tmp) {
 908                         *flags &= ~tmp;
 909                         goto next;
 910                 }
 911                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 912                 if (tmp) {
 913                         *flags |= tmp;
 914                         goto next;
 915                 }
 916                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 917                                    s1);
 918                 RETURN(-EINVAL);
 919
 920 next:
 921                 /* Find next opt */
 922                 s2 = strchr(s1, ',');
 923                 if (s2 == NULL)
 924                         break;
 925                 s1 = s2 + 1;
 926         }
 927         RETURN(0);
 928 }
 929
 930 void ll_lli_init(struct ll_inode_info *lli)
 931 {
 932         lli->lli_inode_magic = LLI_INODE_MAGIC;
 933         lli->lli_flags = 0;
 934         spin_lock_init(&lli->lli_lock);
 935         lli->lli_posix_acl = NULL;
 936         /* Do not set lli_fid, it has been initialized already. */
 937         fid_zero(&lli->lli_pfid);
 938         lli->lli_mds_read_och = NULL;
 939         lli->lli_mds_write_och = NULL;
 940         lli->lli_mds_exec_och = NULL;
 941         lli->lli_open_fd_read_count = 0;
 942         lli->lli_open_fd_write_count = 0;
 943         lli->lli_open_fd_exec_count = 0;
 944         mutex_init(&lli->lli_och_mutex);
 945         spin_lock_init(&lli->lli_agl_lock);
 946         spin_lock_init(&lli->lli_layout_lock);
 947         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 948         lli->lli_clob = NULL;
 949
 950         init_rwsem(&lli->lli_xattrs_list_rwsem);
 951         mutex_init(&lli->lli_xattrs_enq_lock);
 952
 953         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 954         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 955                 mutex_init(&lli->lli_readdir_mutex);
 956                 lli->lli_opendir_key = NULL;
 957                 lli->lli_sai = NULL;
 958                 spin_lock_init(&lli->lli_sa_lock);
 959                 lli->lli_opendir_pid = 0;
 960                 lli->lli_sa_enabled = 0;
 961                 lli->lli_def_stripe_offset = -1;
 962                 init_rwsem(&lli->lli_lsm_sem);
 963         } else {
 964                 mutex_init(&lli->lli_size_mutex);
 965                 lli->lli_symlink_name = NULL;
 966                 init_rwsem(&lli->lli_trunc_sem);
 967                 range_lock_tree_init(&lli->lli_write_tree);
 968                 init_rwsem(&lli->lli_glimpse_sem);
 969                 lli->lli_glimpse_time = ktime_set(0, 0);
 970                 INIT_LIST_HEAD(&lli->lli_agl_list);
 971                 lli->lli_agl_index = 0;
 972                 lli->lli_async_rc = 0;
 973                 spin_lock_init(&lli->lli_heat_lock);
 974                 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
 975                 lli->lli_heat_flags = 0;
 976         }
 977         mutex_init(&lli->lli_layout_mutex);
 978         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
 979 }
 980
 981 #define MAX_STRING_SIZE 128
 982
 983 #ifndef HAVE_SUPER_SETUP_BDI_NAME
 984
 985 #define LSI_BDI_INITIALIZED     0x00400000
 986
 987 #ifndef HAVE_BDI_CAP_MAP_COPY
 988 # define BDI_CAP_MAP_COPY       0
 989 #endif
 990
 991 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
 992 {
 993         struct  lustre_sb_info *lsi = s2lsi(sb);
 994         char buf[MAX_STRING_SIZE];
 995         va_list args;
 996         int err;
 997
 998         err = bdi_init(&lsi->lsi_bdi);
 999         if (err)
1000                 return err;
1001
1002         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1003         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1004         lsi->lsi_bdi.name = "lustre";
1005         va_start(args, fmt);
1006         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1007         va_end(args);
1008         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1009         va_end(args);
1010         if (!err)
1011                 sb->s_bdi = &lsi->lsi_bdi;
1012
1013         return err;
1014 }
1015 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1016
1017 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1018 {
1019         struct  lustre_profile *lprof = NULL;
1020         struct  lustre_sb_info *lsi = s2lsi(sb);
1021         struct  ll_sb_info *sbi = NULL;
1022         char    *dt = NULL, *md = NULL;
1023         char    *profilenm = get_profile_name(sb);
1024         struct config_llog_instance *cfg;
1025         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1026         const int instlen = 16 + 2;
1027         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1028         char name[MAX_STRING_SIZE];
1029         int md_len = 0;
1030         int dt_len = 0;
1031         uuid_t uuid;
1032         char *ptr;
1033         int len;
1034         int err;
1035
1036         ENTRY;
1037         /* for ASLR, to map between cfg_instance and hashed ptr */
1038         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1039                profilenm, cfg_instance, sb);
1040
1041         try_module_get(THIS_MODULE);
1042
1043         OBD_ALLOC_PTR(cfg);
1044         if (cfg == NULL)
1045                 GOTO(out_free_cfg, err = -ENOMEM);
1046
1047         /* client additional sb info */
1048         lsi->lsi_llsbi = sbi = ll_init_sbi();
1049         if (!sbi)
1050                 GOTO(out_free_cfg, err = -ENOMEM);
1051
1052         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1053         if (err)
1054                 GOTO(out_free_cfg, err);
1055
1056 #ifndef HAVE_DCACHE_LOCK
1057         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1058         sb->s_d_op = &ll_d_ops;
1059 #endif
1060         /* UUID handling */
1061         generate_random_uuid(uuid.b);
1062         snprintf(sbi->ll_sb_uuid.uuid, UUID_SIZE, "%pU", uuid.b);
1063
1064         CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1065
1066         /* Get fsname */
1067         len = strlen(profilenm);
1068         ptr = strrchr(profilenm, '-');
1069         if (ptr && (strcmp(ptr, "-client") == 0))
1070                 len -= 7;
1071
1072         if (len > LUSTRE_MAXFSNAME) {
1073                 if (unlikely(len >= MAX_STRING_SIZE))
1074                         len = MAX_STRING_SIZE - 1;
1075                 strncpy(name, profilenm, len);
1076                 name[len] = '\0';
1077                 err = -ENAMETOOLONG;
1078                 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1079                        name, LUSTRE_MAXFSNAME, err);
1080                 GOTO(out_free_cfg, err);
1081         }
1082         strncpy(sbi->ll_fsname, profilenm, len);
1083         sbi->ll_fsname[len] = '\0';
1084
1085         /* Mount info */
1086         snprintf(name, sizeof(name), "%.*s-%016lx", len,
1087                  profilenm, cfg_instance);
1088
1089         err = super_setup_bdi_name(sb, "%s", name);
1090         if (err)
1091                 GOTO(out_free_cfg, err);
1092
1093         /* Call ll_debugfs_register_super() before lustre_process_log()
1094          * so that "llite.*.*" params can be processed correctly.
1095          */
1096         err = ll_debugfs_register_super(sb, name);
1097         if (err < 0) {
1098                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1099                        sbi->ll_fsname, err);
1100                 err = 0;
1101         }
1102
1103         /* The cfg_instance is a value unique to this super, in case some
1104          * joker tries to mount the same fs at two mount points.
1105          */
1106         cfg->cfg_instance = cfg_instance;
1107         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1108         cfg->cfg_callback = class_config_llog_handler;
1109         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1110         /* set up client obds */
1111         err = lustre_process_log(sb, profilenm, cfg);
1112         if (err < 0)
1113                 GOTO(out_debugfs, err);
1114
1115         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1116         lprof = class_get_profile(profilenm);
1117         if (lprof == NULL) {
1118                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1119                                    " read from the MGS.  Does that filesystem "
1120                                    "exist?\n", profilenm);
1121                 GOTO(out_debugfs, err = -EINVAL);
1122         }
1123         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1124                lprof->lp_md, lprof->lp_dt);
1125
1126         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1127         OBD_ALLOC(dt, dt_len);
1128         if (!dt)
1129                 GOTO(out_profile, err = -ENOMEM);
1130         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1131
1132         md_len = strlen(lprof->lp_md) + instlen + 2;
1133         OBD_ALLOC(md, md_len);
1134         if (!md)
1135                 GOTO(out_free_dt, err = -ENOMEM);
1136         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1137
1138         /* connections, registrations, sb setup */
1139         err = client_common_fill_super(sb, md, dt, mnt);
1140         if (err < 0)
1141                 GOTO(out_free_md, err);
1142
1143         sbi->ll_client_common_fill_super_succeeded = 1;
1144
1145 out_free_md:
1146         if (md)
1147                 OBD_FREE(md, md_len);
1148 out_free_dt:
1149         if (dt)
1150                 OBD_FREE(dt, dt_len);
1151 out_profile:
1152         if (lprof)
1153                 class_put_profile(lprof);
1154 out_debugfs:
1155         if (err < 0)
1156                 ll_debugfs_unregister_super(sb);
1157 out_free_cfg:
1158         if (cfg)
1159                 OBD_FREE_PTR(cfg);
1160
1161         if (err)
1162                 ll_put_super(sb);
1163         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1164                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1165         RETURN(err);
1166 } /* ll_fill_super */
1167
1168 void ll_put_super(struct super_block *sb)
1169 {
1170         struct config_llog_instance cfg, params_cfg;
1171         struct obd_device *obd;
1172         struct lustre_sb_info *lsi = s2lsi(sb);
1173         struct ll_sb_info *sbi = ll_s2sbi(sb);
1174         char *profilenm = get_profile_name(sb);
1175         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1176         long ccc_count;
1177         int next, force = 1, rc = 0;
1178         ENTRY;
1179
1180         if (!sbi)
1181                 GOTO(out_no_sbi, 0);
1182
1183         /* Should replace instance_id with something better for ASLR */
1184         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1185                profilenm, cfg_instance, sb);
1186
1187         cfg.cfg_instance = cfg_instance;
1188         lustre_end_log(sb, profilenm, &cfg);
1189
1190         params_cfg.cfg_instance = cfg_instance;
1191         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1192
1193         if (sbi->ll_md_exp) {
1194                 obd = class_exp2obd(sbi->ll_md_exp);
1195                 if (obd)
1196                         force = obd->obd_force;
1197         }
1198
1199         /* Wait for unstable pages to be committed to stable storage */
1200         if (force == 0) {
1201                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1202                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1203                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1204                         &lwi);
1205         }
1206
1207         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1208         if (force == 0 && rc != -EINTR)
1209                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1210
1211         /* We need to set force before the lov_disconnect in
1212            lustre_common_put_super, since l_d cleans up osc's as well. */
1213         if (force) {
1214                 next = 0;
1215                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1216                                                      &next)) != NULL) {
1217                         obd->obd_force = force;
1218                 }
1219         }
1220
1221         if (sbi->ll_client_common_fill_super_succeeded) {
1222                 /* Only if client_common_fill_super succeeded */
1223                 client_common_put_super(sb);
1224         }
1225
1226         next = 0;
1227         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1228                 class_manual_cleanup(obd);
1229         }
1230
1231         if (sbi->ll_flags & LL_SBI_VERBOSE)
1232                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1233
1234         if (profilenm)
1235                 class_del_profile(profilenm);
1236
1237 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1238         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1239                 bdi_destroy(&lsi->lsi_bdi);
1240                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1241         }
1242 #endif
1243
1244         ll_free_sbi(sb);
1245         lsi->lsi_llsbi = NULL;
1246 out_no_sbi:
1247         lustre_common_put_super(sb);
1248
1249         cl_env_cache_purge(~0);
1250
1251         module_put(THIS_MODULE);
1252
1253         EXIT;
1254 } /* client_put_super */
1255
1256 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1257 {
1258         struct inode *inode = NULL;
1259
1260         /* NOTE: we depend on atomic igrab() -bzzz */
1261         lock_res_and_lock(lock);
1262         if (lock->l_resource->lr_lvb_inode) {
1263                 struct ll_inode_info * lli;
1264                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1265                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1266                         inode = igrab(lock->l_resource->lr_lvb_inode);
1267                 } else {
1268                         inode = lock->l_resource->lr_lvb_inode;
1269                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1270                                          D_WARNING, lock, "lr_lvb_inode %p is "
1271                                          "bogus: magic %08x",
1272                                          lock->l_resource->lr_lvb_inode,
1273                                          lli->lli_inode_magic);
1274                         inode = NULL;
1275                 }
1276         }
1277         unlock_res_and_lock(lock);
1278         return inode;
1279 }
1280
1281 void ll_dir_clear_lsm_md(struct inode *inode)
1282 {
1283         struct ll_inode_info *lli = ll_i2info(inode);
1284
1285         LASSERT(S_ISDIR(inode->i_mode));
1286
1287         if (lli->lli_lsm_md != NULL) {
1288                 lmv_free_memmd(lli->lli_lsm_md);
1289                 lli->lli_lsm_md = NULL;
1290         }
1291 }
1292
1293 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1294                                       const struct lu_fid *fid,
1295                                       struct lustre_md *md)
1296 {
1297         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1298         struct mdt_body         *body = md->body;
1299         struct inode            *inode;
1300         ino_t                   ino;
1301         ENTRY;
1302
1303         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1304         inode = iget_locked(sb, ino);
1305         if (inode == NULL) {
1306                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1307                        sbi->ll_fsname, PFID(fid));
1308                 RETURN(ERR_PTR(-ENOENT));
1309         }
1310
1311         if (inode->i_state & I_NEW) {
1312                 struct ll_inode_info *lli = ll_i2info(inode);
1313                 struct lmv_stripe_md *lsm = md->lmv;
1314
1315                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1316                                 (body->mbo_mode & S_IFMT);
1317                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1318                          PFID(fid));
1319
1320                 inode->i_mtime.tv_sec = 0;
1321                 inode->i_atime.tv_sec = 0;
1322                 inode->i_ctime.tv_sec = 0;
1323                 inode->i_rdev = 0;
1324
1325 #ifdef HAVE_BACKING_DEV_INFO
1326                 /* initializing backing dev info. */
1327                 inode->i_mapping->backing_dev_info =
1328                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1329 #endif
1330                 inode->i_op = &ll_dir_inode_operations;
1331                 inode->i_fop = &ll_dir_operations;
1332                 lli->lli_fid = *fid;
1333                 ll_lli_init(lli);
1334
1335                 LASSERT(lsm != NULL);
1336                 /* master object FID */
1337                 lli->lli_pfid = body->mbo_fid1;
1338                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1339                        lli, PFID(fid), PFID(&lli->lli_pfid));
1340                 unlock_new_inode(inode);
1341         }
1342
1343         RETURN(inode);
1344 }
1345
1346 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1347 {
1348         struct lu_fid *fid;
1349         struct lmv_stripe_md *lsm = md->lmv;
1350         struct ll_inode_info *lli = ll_i2info(inode);
1351         int i;
1352
1353         LASSERT(lsm != NULL);
1354
1355         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1356                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1357         lsm_md_dump(D_INODE, lsm);
1358
1359         /* XXX sigh, this lsm_root initialization should be in
1360          * LMV layer, but it needs ll_iget right now, so we
1361          * put this here right now. */
1362         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1363                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1364                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1365
1366                 if (!fid_is_sane(fid))
1367                         continue;
1368
1369                 /* Unfortunately ll_iget will call ll_update_inode,
1370                  * where the initialization of slave inode is slightly
1371                  * different, so it reset lsm_md to NULL to avoid
1372                  * initializing lsm for slave inode. */
1373                 lsm->lsm_md_oinfo[i].lmo_root =
1374                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1375                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1376                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1377
1378                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1379                         while (i-- > 0) {
1380                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1381                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1382                         }
1383                         return rc;
1384                 }
1385         }
1386
1387         lli->lli_lsm_md = lsm;
1388
1389         return 0;
1390 }
1391
1392 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1393 {
1394         struct ll_inode_info *lli = ll_i2info(inode);
1395         struct lmv_stripe_md *lsm = md->lmv;
1396         int rc = 0;
1397
1398         ENTRY;
1399
1400         LASSERT(S_ISDIR(inode->i_mode));
1401         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1402                PFID(ll_inode2fid(inode)));
1403
1404         /*
1405          * no striped information from request, lustre_md from req does not
1406          * include stripeEA, see ll_md_setattr()
1407          */
1408         if (!lsm)
1409                 RETURN(0);
1410
1411         /*
1412          * normally dir layout doesn't change, only take read lock to check
1413          * that to avoid blocking other MD operations.
1414          */
1415         if (lli->lli_lsm_md)
1416                 down_read(&lli->lli_lsm_sem);
1417         else
1418                 down_write(&lli->lli_lsm_sem);
1419
1420         /*
1421          * if dir layout mismatch, check whether version is increased, which
1422          * means layout is changed, this happens in dir migration and lfsck.
1423          *
1424          * foreign LMV should not change.
1425          */
1426         if (lli->lli_lsm_md &&
1427             lli->lli_lsm_md->lsm_md_magic != LMV_MAGIC_FOREIGN &&
1428            !lsm_md_eq(lli->lli_lsm_md, lsm)) {
1429                 if (lsm->lsm_md_layout_version <=
1430                     lli->lli_lsm_md->lsm_md_layout_version) {
1431                         CERROR("%s: "DFID" dir layout mismatch:\n",
1432                                ll_i2sbi(inode)->ll_fsname,
1433                                PFID(&lli->lli_fid));
1434                         lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1435                         lsm_md_dump(D_ERROR, lsm);
1436                         GOTO(unlock, rc = -EINVAL);
1437                 }
1438
1439                 /* layout changed, switch to write lock */
1440                 up_read(&lli->lli_lsm_sem);
1441                 down_write(&lli->lli_lsm_sem);
1442                 ll_dir_clear_lsm_md(inode);
1443         }
1444
1445         /* set directory layout */
1446         if (!lli->lli_lsm_md) {
1447                 struct cl_attr  *attr;
1448
1449                 if (lsm->lsm_md_magic == LMV_MAGIC_FOREIGN) {
1450                         /* set md->lmv to NULL, so the following free lustre_md
1451                          * will not free this lsm */
1452                         md->lmv = NULL;
1453                         lli->lli_lsm_md = lsm;
1454                         up_write(&lli->lli_lsm_sem);
1455                         RETURN(0);
1456                 }
1457
1458                 rc = ll_init_lsm_md(inode, md);
1459                 up_write(&lli->lli_lsm_sem);
1460                 if (rc != 0)
1461                         RETURN(rc);
1462
1463                 /* set md->lmv to NULL, so the following free lustre_md
1464                  * will not free this lsm */
1465                 md->lmv = NULL;
1466
1467                 /*
1468                  * md_merge_attr() may take long, since lsm is already set,
1469                  * switch to read lock.
1470                  */
1471                 down_read(&lli->lli_lsm_sem);
1472
1473                 OBD_ALLOC_PTR(attr);
1474                 if (attr == NULL)
1475                         GOTO(unlock, rc = -ENOMEM);
1476
1477                 /* validate the lsm */
1478                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1479                                    ll_md_blocking_ast);
1480                 if (rc != 0) {
1481                         OBD_FREE_PTR(attr);
1482                         GOTO(unlock, rc);
1483                 }
1484
1485                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1486                         md->body->mbo_nlink = attr->cat_nlink;
1487                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1488                         md->body->mbo_size = attr->cat_size;
1489                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1490                         md->body->mbo_atime = attr->cat_atime;
1491                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1492                         md->body->mbo_ctime = attr->cat_ctime;
1493                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1494                         md->body->mbo_mtime = attr->cat_mtime;
1495
1496                 OBD_FREE_PTR(attr);
1497         }
1498 unlock:
1499         up_read(&lli->lli_lsm_sem);
1500
1501         RETURN(rc);
1502 }
1503
1504 void ll_clear_inode(struct inode *inode)
1505 {
1506         struct ll_inode_info *lli = ll_i2info(inode);
1507         struct ll_sb_info *sbi = ll_i2sbi(inode);
1508         ENTRY;
1509
1510         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1511                PFID(ll_inode2fid(inode)), inode);
1512
1513         if (S_ISDIR(inode->i_mode)) {
1514                 /* these should have been cleared in ll_file_release */
1515                 LASSERT(lli->lli_opendir_key == NULL);
1516                 LASSERT(lli->lli_sai == NULL);
1517                 LASSERT(lli->lli_opendir_pid == 0);
1518         }
1519
1520         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1521
1522         LASSERT(!lli->lli_open_fd_write_count);
1523         LASSERT(!lli->lli_open_fd_read_count);
1524         LASSERT(!lli->lli_open_fd_exec_count);
1525
1526         if (lli->lli_mds_write_och)
1527                 ll_md_real_close(inode, FMODE_WRITE);
1528         if (lli->lli_mds_exec_och)
1529                 ll_md_real_close(inode, FMODE_EXEC);
1530         if (lli->lli_mds_read_och)
1531                 ll_md_real_close(inode, FMODE_READ);
1532
1533         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1534                 OBD_FREE(lli->lli_symlink_name,
1535                          strlen(lli->lli_symlink_name) + 1);
1536                 lli->lli_symlink_name = NULL;
1537         }
1538
1539         ll_xattr_cache_destroy(inode);
1540
1541 #ifdef CONFIG_FS_POSIX_ACL
1542         forget_all_cached_acls(inode);
1543         if (lli->lli_posix_acl) {
1544                 posix_acl_release(lli->lli_posix_acl);
1545                 lli->lli_posix_acl = NULL;
1546         }
1547 #endif
1548         lli->lli_inode_magic = LLI_INODE_DEAD;
1549
1550         if (S_ISDIR(inode->i_mode))
1551                 ll_dir_clear_lsm_md(inode);
1552         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1553                 LASSERT(list_empty(&lli->lli_agl_list));
1554
1555         /*
1556          * XXX This has to be done before lsm is freed below, because
1557          * cl_object still uses inode lsm.
1558          */
1559         cl_inode_fini(inode);
1560
1561         EXIT;
1562 }
1563
1564 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1565 {
1566         struct lustre_md md;
1567         struct inode *inode = dentry->d_inode;
1568         struct ll_sb_info *sbi = ll_i2sbi(inode);
1569         struct ptlrpc_request *request = NULL;
1570         int rc, ia_valid;
1571         ENTRY;
1572
1573         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1574                                      LUSTRE_OPC_ANY, NULL);
1575         if (IS_ERR(op_data))
1576                 RETURN(PTR_ERR(op_data));
1577
1578         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1579         if (rc) {
1580                 ptlrpc_req_finished(request);
1581                 if (rc == -ENOENT) {
1582                         clear_nlink(inode);
1583                         /* Unlinked special device node? Or just a race?
1584                          * Pretend we done everything. */
1585                         if (!S_ISREG(inode->i_mode) &&
1586                             !S_ISDIR(inode->i_mode)) {
1587                                 ia_valid = op_data->op_attr.ia_valid;
1588                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1589                                 rc = simple_setattr(dentry, &op_data->op_attr);
1590                                 op_data->op_attr.ia_valid = ia_valid;
1591                         }
1592                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1593                         CERROR("md_setattr fails: rc = %d\n", rc);
1594                 }
1595                 RETURN(rc);
1596         }
1597
1598         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1599                               sbi->ll_md_exp, &md);
1600         if (rc) {
1601                 ptlrpc_req_finished(request);
1602                 RETURN(rc);
1603         }
1604
1605         ia_valid = op_data->op_attr.ia_valid;
1606         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1607          * cache is not cleared yet. */
1608         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1609         if (S_ISREG(inode->i_mode))
1610                 inode_lock(inode);
1611         rc = simple_setattr(dentry, &op_data->op_attr);
1612         if (S_ISREG(inode->i_mode))
1613                 inode_unlock(inode);
1614         op_data->op_attr.ia_valid = ia_valid;
1615
1616         rc = ll_update_inode(inode, &md);
1617         ptlrpc_req_finished(request);
1618
1619         RETURN(rc);
1620 }
1621
1622 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1623  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1624  * keep these values until such a time that objects are allocated for it.
1625  * We do the MDS operations first, as it is checking permissions for us.
1626  * We don't to the MDS RPC if there is nothing that we want to store there,
1627  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1628  * going to do an RPC anyways.
1629  *
1630  * If we are doing a truncate, we will send the mtime and ctime updates
1631  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1632  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1633  * at the same time.
1634  *
1635  * In case of HSMimport, we only set attr on MDS.
1636  */
1637 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1638                    enum op_xvalid xvalid, bool hsm_import)
1639 {
1640         struct inode *inode = dentry->d_inode;
1641         struct ll_inode_info *lli = ll_i2info(inode);
1642         struct md_op_data *op_data = NULL;
1643         int rc = 0;
1644         ENTRY;
1645
1646         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1647                "valid %x, hsm_import %d\n",
1648                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
1649                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1650                hsm_import);
1651
1652         if (attr->ia_valid & ATTR_SIZE) {
1653                 /* Check new size against VFS/VM file size limit and rlimit */
1654                 rc = inode_newsize_ok(inode, attr->ia_size);
1655                 if (rc)
1656                         RETURN(rc);
1657
1658                 /* The maximum Lustre file size is variable, based on the
1659                  * OST maximum object size and number of stripes.  This
1660                  * needs another check in addition to the VFS check above. */
1661                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1662                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1663                                PFID(&lli->lli_fid), attr->ia_size,
1664                                ll_file_maxbytes(inode));
1665                         RETURN(-EFBIG);
1666                 }
1667
1668                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1669         }
1670
1671         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1672         if (attr->ia_valid & TIMES_SET_FLAGS) {
1673                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1674                     !cfs_capable(CFS_CAP_FOWNER))
1675                         RETURN(-EPERM);
1676         }
1677
1678         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1679         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1680              (attr->ia_valid & ATTR_CTIME)) {
1681                 attr->ia_ctime = current_time(inode);
1682                 xvalid |= OP_XVALID_CTIME_SET;
1683         }
1684         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1685             (attr->ia_valid & ATTR_ATIME)) {
1686                 attr->ia_atime = current_time(inode);
1687                 attr->ia_valid |= ATTR_ATIME_SET;
1688         }
1689         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1690             (attr->ia_valid & ATTR_MTIME)) {
1691                 attr->ia_mtime = current_time(inode);
1692                 attr->ia_valid |= ATTR_MTIME_SET;
1693         }
1694
1695         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1696                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1697                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1698                        ktime_get_real_seconds());
1699
1700         if (S_ISREG(inode->i_mode)) {
1701                 if (attr->ia_valid & ATTR_SIZE)
1702                         inode_dio_write_done(inode);
1703                 inode_unlock(inode);
1704         }
1705
1706         /* We always do an MDS RPC, even if we're only changing the size;
1707          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1708
1709         OBD_ALLOC_PTR(op_data);
1710         if (op_data == NULL)
1711                 GOTO(out, rc = -ENOMEM);
1712
1713         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1714                 /* If we are changing file size, file content is
1715                  * modified, flag it.
1716                  */
1717                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1718                 op_data->op_bias |= MDS_DATA_MODIFIED;
1719                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1720         }
1721
1722         if (attr->ia_valid & ATTR_FILE) {
1723                 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1724
1725                 if (fd->fd_lease_och)
1726                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1727         }
1728
1729         op_data->op_attr = *attr;
1730         op_data->op_xvalid = xvalid;
1731
1732         rc = ll_md_setattr(dentry, op_data);
1733         if (rc)
1734                 GOTO(out, rc);
1735
1736         if (!S_ISREG(inode->i_mode) || hsm_import)
1737                 GOTO(out, rc = 0);
1738
1739         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1740                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1741             xvalid & OP_XVALID_CTIME_SET) {
1742                 /* For truncate and utimes sending attributes to OSTs, setting
1743                  * mtime/atime to the past will be performed under PW [0:EOF]
1744                  * extent lock (new_size:EOF for truncate).  It may seem
1745                  * excessive to send mtime/atime updates to OSTs when not
1746                  * setting times to past, but it is necessary due to possible
1747                  * time de-synchronization between MDT inode and OST objects
1748                  */
1749                 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1750         }
1751
1752         /* If the file was restored, it needs to set dirty flag.
1753          *
1754          * We've already sent MDS_DATA_MODIFIED flag in
1755          * ll_md_setattr() for truncate. However, the MDT refuses to
1756          * set the HS_DIRTY flag on released files, so we have to set
1757          * it again if the file has been restored. Please check how
1758          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1759          *
1760          * Please notice that if the file is not released, the previous
1761          * MDS_DATA_MODIFIED has taken effect and usually
1762          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1763          * This way we can save an RPC for common open + trunc
1764          * operation. */
1765         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1766                 struct hsm_state_set hss = {
1767                         .hss_valid = HSS_SETMASK,
1768                         .hss_setmask = HS_DIRTY,
1769                 };
1770                 int rc2;
1771
1772                 rc2 = ll_hsm_state_set(inode, &hss);
1773                 /* truncate and write can happen at the same time, so that
1774                  * the file can be set modified even though the file is not
1775                  * restored from released state, and ll_hsm_state_set() is
1776                  * not applicable for the file, and rc2 < 0 is normal in this
1777                  * case. */
1778                 if (rc2 < 0)
1779                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1780                                PFID(ll_inode2fid(inode)), rc2);
1781         }
1782
1783         EXIT;
1784 out:
1785         if (op_data != NULL)
1786                 ll_finish_md_op_data(op_data);
1787
1788         if (S_ISREG(inode->i_mode)) {
1789                 inode_lock(inode);
1790                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1791                         inode_dio_wait(inode);
1792                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1793                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1794                  * inode flags, so there is a gap where S_NOSEC is not set.
1795                  * This can cause a writer to take the i_mutex unnecessarily,
1796                  * but this is safe to do and should be rare. */
1797                 inode_has_no_xattr(inode);
1798         }
1799
1800         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1801                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1802
1803         return rc;
1804 }
1805
1806 int ll_setattr(struct dentry *de, struct iattr *attr)
1807 {
1808         int mode = de->d_inode->i_mode;
1809         enum op_xvalid xvalid = 0;
1810
1811         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1812                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1813                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1814
1815         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1816                                (ATTR_SIZE|ATTR_MODE)) &&
1817             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1818              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1819               !(attr->ia_mode & S_ISGID))))
1820                 attr->ia_valid |= ATTR_FORCE;
1821
1822         if ((attr->ia_valid & ATTR_MODE) &&
1823             (mode & S_ISUID) &&
1824             !(attr->ia_mode & S_ISUID) &&
1825             !(attr->ia_valid & ATTR_KILL_SUID))
1826                 attr->ia_valid |= ATTR_KILL_SUID;
1827
1828         if ((attr->ia_valid & ATTR_MODE) &&
1829             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1830             !(attr->ia_mode & S_ISGID) &&
1831             !(attr->ia_valid & ATTR_KILL_SGID))
1832                 attr->ia_valid |= ATTR_KILL_SGID;
1833
1834         return ll_setattr_raw(de, attr, xvalid, false);
1835 }
1836
1837 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1838                        u32 flags)
1839 {
1840         struct obd_statfs obd_osfs = { 0 };
1841         time64_t max_age;
1842         int rc;
1843
1844         ENTRY;
1845         max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1846
1847         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1848         if (rc)
1849                 RETURN(rc);
1850
1851         osfs->os_type = LL_SUPER_MAGIC;
1852
1853         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1854               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1855
1856         if (osfs->os_state & OS_STATE_SUM)
1857                 GOTO(out, rc);
1858
1859         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1860                 flags |= OBD_STATFS_NODELAY;
1861
1862         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1863         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
1864                 GOTO(out, rc = 0);
1865
1866         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1867                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1868                obd_osfs.os_files);
1869
1870         osfs->os_bsize = obd_osfs.os_bsize;
1871         osfs->os_blocks = obd_osfs.os_blocks;
1872         osfs->os_bfree = obd_osfs.os_bfree;
1873         osfs->os_bavail = obd_osfs.os_bavail;
1874
1875         /* If we have _some_ OSTs, but don't have as many free objects on the
1876          * OSTs as inodes on the MDTs, reduce the reported number of inodes
1877          * to compensate, so that the "inodes in use" number is correct.
1878          * This should be kept in sync with lod_statfs() behaviour.
1879          */
1880         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1881                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1882                                  obd_osfs.os_ffree;
1883                 osfs->os_ffree = obd_osfs.os_ffree;
1884         }
1885
1886 out:
1887         RETURN(rc);
1888 }
1889 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1890 {
1891         struct super_block *sb = de->d_sb;
1892         struct obd_statfs osfs;
1893         __u64 fsid = huge_encode_dev(sb->s_dev);
1894         int rc;
1895
1896         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1897         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1898
1899         /* Some amount of caching on the client is allowed */
1900         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1901         if (rc)
1902                 return rc;
1903
1904         statfs_unpack(sfs, &osfs);
1905
1906         /* We need to downshift for all 32-bit kernels, because we can't
1907          * tell if the kernel is being called via sys_statfs64() or not.
1908          * Stop before overflowing f_bsize - in which case it is better
1909          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1910         if (sizeof(long) < 8) {
1911                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1912                         sfs->f_bsize <<= 1;
1913
1914                         osfs.os_blocks >>= 1;
1915                         osfs.os_bfree >>= 1;
1916                         osfs.os_bavail >>= 1;
1917                 }
1918         }
1919
1920         sfs->f_blocks = osfs.os_blocks;
1921         sfs->f_bfree = osfs.os_bfree;
1922         sfs->f_bavail = osfs.os_bavail;
1923         sfs->f_fsid.val[0] = (__u32)fsid;
1924         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1925         return 0;
1926 }
1927
1928 void ll_inode_size_lock(struct inode *inode)
1929 {
1930         struct ll_inode_info *lli;
1931
1932         LASSERT(!S_ISDIR(inode->i_mode));
1933
1934         lli = ll_i2info(inode);
1935         mutex_lock(&lli->lli_size_mutex);
1936 }
1937
1938 void ll_inode_size_unlock(struct inode *inode)
1939 {
1940         struct ll_inode_info *lli;
1941
1942         lli = ll_i2info(inode);
1943         mutex_unlock(&lli->lli_size_mutex);
1944 }
1945
1946 void ll_update_inode_flags(struct inode *inode, int ext_flags)
1947 {
1948         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
1949         if (ext_flags & LUSTRE_PROJINHERIT_FL)
1950                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1951         else
1952                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1953 }
1954
1955 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1956 {
1957         struct ll_inode_info *lli = ll_i2info(inode);
1958         struct mdt_body *body = md->body;
1959         struct ll_sb_info *sbi = ll_i2sbi(inode);
1960         int rc = 0;
1961
1962         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1963                 rc = cl_file_inode_init(inode, md);
1964                 if (rc)
1965                         return rc;
1966         }
1967
1968         if (S_ISDIR(inode->i_mode)) {
1969                 rc = ll_update_lsm_md(inode, md);
1970                 if (rc != 0)
1971                         return rc;
1972         }
1973
1974 #ifdef CONFIG_FS_POSIX_ACL
1975         if (body->mbo_valid & OBD_MD_FLACL) {
1976                 spin_lock(&lli->lli_lock);
1977                 if (lli->lli_posix_acl)
1978                         posix_acl_release(lli->lli_posix_acl);
1979                 lli->lli_posix_acl = md->posix_acl;
1980                 spin_unlock(&lli->lli_lock);
1981         }
1982 #endif
1983         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1984                                         sbi->ll_flags & LL_SBI_32BIT_API);
1985         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1986
1987         if (body->mbo_valid & OBD_MD_FLATIME) {
1988                 if (body->mbo_atime > inode->i_atime.tv_sec)
1989                         inode->i_atime.tv_sec = body->mbo_atime;
1990                 lli->lli_atime = body->mbo_atime;
1991         }
1992
1993         if (body->mbo_valid & OBD_MD_FLMTIME) {
1994                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
1995                         CDEBUG(D_INODE,
1996                                "setting ino %lu mtime from %lld to %llu\n",
1997                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
1998                                body->mbo_mtime);
1999                         inode->i_mtime.tv_sec = body->mbo_mtime;
2000                 }
2001                 lli->lli_mtime = body->mbo_mtime;
2002         }
2003
2004         if (body->mbo_valid & OBD_MD_FLCTIME) {
2005                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2006                         inode->i_ctime.tv_sec = body->mbo_ctime;
2007                 lli->lli_ctime = body->mbo_ctime;
2008         }
2009
2010         /* Clear i_flags to remove S_NOSEC before permissions are updated */
2011         if (body->mbo_valid & OBD_MD_FLFLAGS)
2012                 ll_update_inode_flags(inode, body->mbo_flags);
2013         if (body->mbo_valid & OBD_MD_FLMODE)
2014                 inode->i_mode = (inode->i_mode & S_IFMT) |
2015                                 (body->mbo_mode & ~S_IFMT);
2016
2017         if (body->mbo_valid & OBD_MD_FLTYPE)
2018                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2019                                 (body->mbo_mode & S_IFMT);
2020
2021         LASSERT(inode->i_mode != 0);
2022         if (S_ISREG(inode->i_mode))
2023                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
2024                                        LL_MAX_BLKSIZE_BITS);
2025         else
2026                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2027
2028         if (body->mbo_valid & OBD_MD_FLUID)
2029                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2030         if (body->mbo_valid & OBD_MD_FLGID)
2031                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2032         if (body->mbo_valid & OBD_MD_FLPROJID)
2033                 lli->lli_projid = body->mbo_projid;
2034         if (body->mbo_valid & OBD_MD_FLNLINK)
2035                 set_nlink(inode, body->mbo_nlink);
2036         if (body->mbo_valid & OBD_MD_FLRDEV)
2037                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2038
2039         if (body->mbo_valid & OBD_MD_FLID) {
2040                 /* FID shouldn't be changed! */
2041                 if (fid_is_sane(&lli->lli_fid)) {
2042                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2043                                  "Trying to change FID "DFID
2044                                  " to the "DFID", inode "DFID"(%p)\n",
2045                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2046                                  PFID(ll_inode2fid(inode)), inode);
2047                 } else {
2048                         lli->lli_fid = body->mbo_fid1;
2049                 }
2050         }
2051
2052         LASSERT(fid_seq(&lli->lli_fid) != 0);
2053
2054         if (body->mbo_valid & OBD_MD_FLSIZE) {
2055                 i_size_write(inode, body->mbo_size);
2056
2057                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2058                        PFID(ll_inode2fid(inode)),
2059                        (unsigned long long)body->mbo_size);
2060
2061                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2062                         inode->i_blocks = body->mbo_blocks;
2063         }
2064
2065         if (body->mbo_valid & OBD_MD_TSTATE) {
2066                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2067                  * clear it when done to ensure to start again
2068                  * glimpsing updated attrs
2069                  */
2070                 if (body->mbo_t_state & MS_RESTORE)
2071                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2072                 else
2073                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2074         }
2075
2076         return 0;
2077 }
2078
2079 int ll_read_inode2(struct inode *inode, void *opaque)
2080 {
2081         struct lustre_md *md = opaque;
2082         struct ll_inode_info *lli = ll_i2info(inode);
2083         int     rc;
2084         ENTRY;
2085
2086         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2087                PFID(&lli->lli_fid), inode);
2088
2089         /* Core attributes from the MDS first.  This is a new inode, and
2090          * the VFS doesn't zero times in the core inode so we have to do
2091          * it ourselves.  They will be overwritten by either MDS or OST
2092          * attributes - we just need to make sure they aren't newer.
2093          */
2094         inode->i_mtime.tv_sec = 0;
2095         inode->i_atime.tv_sec = 0;
2096         inode->i_ctime.tv_sec = 0;
2097         inode->i_rdev = 0;
2098         rc = ll_update_inode(inode, md);
2099         if (rc != 0)
2100                 RETURN(rc);
2101
2102         /* OIDEBUG(inode); */
2103
2104 #ifdef HAVE_BACKING_DEV_INFO
2105         /* initializing backing dev info. */
2106         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2107 #endif
2108         if (S_ISREG(inode->i_mode)) {
2109                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2110                 inode->i_op = &ll_file_inode_operations;
2111                 inode->i_fop = sbi->ll_fop;
2112                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2113                 EXIT;
2114         } else if (S_ISDIR(inode->i_mode)) {
2115                 inode->i_op = &ll_dir_inode_operations;
2116                 inode->i_fop = &ll_dir_operations;
2117                 EXIT;
2118         } else if (S_ISLNK(inode->i_mode)) {
2119                 inode->i_op = &ll_fast_symlink_inode_operations;
2120                 EXIT;
2121         } else {
2122                 inode->i_op = &ll_special_inode_operations;
2123
2124                 init_special_inode(inode, inode->i_mode,
2125                                    inode->i_rdev);
2126
2127                 EXIT;
2128         }
2129
2130         return 0;
2131 }
2132
2133 void ll_delete_inode(struct inode *inode)
2134 {
2135         struct ll_inode_info *lli = ll_i2info(inode);
2136         struct address_space *mapping = &inode->i_data;
2137         unsigned long nrpages;
2138         ENTRY;
2139
2140         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2141                 /* It is last chance to write out dirty pages,
2142                  * otherwise we may lose data while umount */
2143                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2144
2145         truncate_inode_pages_final(mapping);
2146
2147         /* Workaround for LU-118: Note nrpages may not be totally updated when
2148          * truncate_inode_pages() returns, as there can be a page in the process
2149          * of deletion (inside __delete_from_page_cache()) in the specified
2150          * range. Thus mapping->nrpages can be non-zero when this function
2151          * returns even after truncation of the whole mapping.  Only do this if
2152          * npages isn't already zero.
2153          */
2154         nrpages = mapping->nrpages;
2155         if (nrpages) {
2156                 xa_lock_irq(&mapping->i_pages);
2157                 nrpages = mapping->nrpages;
2158                 xa_unlock_irq(&mapping->i_pages);
2159         } /* Workaround end */
2160
2161         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2162                  "see https://jira.whamcloud.com/browse/LU-118\n",
2163                  ll_i2sbi(inode)->ll_fsname,
2164                  PFID(ll_inode2fid(inode)), inode, nrpages);
2165
2166 #ifdef HAVE_SBOPS_EVICT_INODE
2167         ll_clear_inode(inode);
2168 #endif
2169         clear_inode(inode);
2170
2171         EXIT;
2172 }
2173
2174 int ll_iocontrol(struct inode *inode, struct file *file,
2175                  unsigned int cmd, unsigned long arg)
2176 {
2177         struct ll_sb_info *sbi = ll_i2sbi(inode);
2178         struct ptlrpc_request *req = NULL;
2179         int rc, flags = 0;
2180         ENTRY;
2181
2182         switch (cmd) {
2183         case FS_IOC_GETFLAGS: {
2184                 struct mdt_body *body;
2185                 struct md_op_data *op_data;
2186
2187                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2188                                              0, 0, LUSTRE_OPC_ANY,
2189                                              NULL);
2190                 if (IS_ERR(op_data))
2191                         RETURN(PTR_ERR(op_data));
2192
2193                 op_data->op_valid = OBD_MD_FLFLAGS;
2194                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2195                 ll_finish_md_op_data(op_data);
2196                 if (rc) {
2197                         CERROR("%s: failure inode "DFID": rc = %d\n",
2198                                sbi->ll_md_exp->exp_obd->obd_name,
2199                                PFID(ll_inode2fid(inode)), rc);
2200                         RETURN(-abs(rc));
2201                 }
2202
2203                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2204
2205                 flags = body->mbo_flags;
2206
2207                 ptlrpc_req_finished(req);
2208
2209                 RETURN(put_user(flags, (int __user *)arg));
2210         }
2211         case FS_IOC_SETFLAGS: {
2212                 struct iattr *attr;
2213                 struct md_op_data *op_data;
2214                 struct cl_object *obj;
2215                 struct fsxattr fa = { 0 };
2216
2217                 if (get_user(flags, (int __user *)arg))
2218                         RETURN(-EFAULT);
2219
2220                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2221                 if (flags & LUSTRE_PROJINHERIT_FL)
2222                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2223
2224                 rc = ll_ioctl_check_project(inode, &fa);
2225                 if (rc)
2226                         RETURN(rc);
2227
2228                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2229                                              LUSTRE_OPC_ANY, NULL);
2230                 if (IS_ERR(op_data))
2231                         RETURN(PTR_ERR(op_data));
2232
2233                 op_data->op_attr_flags = flags;
2234                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2235                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2236                 ll_finish_md_op_data(op_data);
2237                 ptlrpc_req_finished(req);
2238                 if (rc)
2239                         RETURN(rc);
2240
2241                 ll_update_inode_flags(inode, flags);
2242
2243                 obj = ll_i2info(inode)->lli_clob;
2244                 if (obj == NULL)
2245                         RETURN(0);
2246
2247                 OBD_ALLOC_PTR(attr);
2248                 if (attr == NULL)
2249                         RETURN(-ENOMEM);
2250
2251                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2252
2253                 OBD_FREE_PTR(attr);
2254                 RETURN(rc);
2255         }
2256         default:
2257                 RETURN(-ENOSYS);
2258         }
2259
2260         RETURN(0);
2261 }
2262
2263 int ll_flush_ctx(struct inode *inode)
2264 {
2265         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2266
2267         CDEBUG(D_SEC, "flush context for user %d\n",
2268                from_kuid(&init_user_ns, current_uid()));
2269
2270         obd_set_info_async(NULL, sbi->ll_md_exp,
2271                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2272                            0, NULL, NULL);
2273         obd_set_info_async(NULL, sbi->ll_dt_exp,
2274                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2275                            0, NULL, NULL);
2276         return 0;
2277 }
2278
2279 /* umount -f client means force down, don't save state */
2280 void ll_umount_begin(struct super_block *sb)
2281 {
2282         struct ll_sb_info *sbi = ll_s2sbi(sb);
2283         struct obd_device *obd;
2284         struct obd_ioctl_data *ioc_data;
2285         struct l_wait_info lwi;
2286         wait_queue_head_t waitq;
2287         ENTRY;
2288
2289         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2290                sb->s_count, atomic_read(&sb->s_active));
2291
2292         obd = class_exp2obd(sbi->ll_md_exp);
2293         if (obd == NULL) {
2294                 CERROR("Invalid MDC connection handle %#llx\n",
2295                        sbi->ll_md_exp->exp_handle.h_cookie);
2296                 EXIT;
2297                 return;
2298         }
2299         obd->obd_force = 1;
2300
2301         obd = class_exp2obd(sbi->ll_dt_exp);
2302         if (obd == NULL) {
2303                 CERROR("Invalid LOV connection handle %#llx\n",
2304                        sbi->ll_dt_exp->exp_handle.h_cookie);
2305                 EXIT;
2306                 return;
2307         }
2308         obd->obd_force = 1;
2309
2310         OBD_ALLOC_PTR(ioc_data);
2311         if (ioc_data) {
2312                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2313                               sizeof *ioc_data, ioc_data, NULL);
2314
2315                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2316                               sizeof *ioc_data, ioc_data, NULL);
2317
2318                 OBD_FREE_PTR(ioc_data);
2319         }
2320
2321         /* Really, we'd like to wait until there are no requests outstanding,
2322          * and then continue.  For now, we just periodically checking for vfs
2323          * to decrement mnt_cnt and hope to finish it within 10sec.
2324          */
2325         init_waitqueue_head(&waitq);
2326         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2327                                    cfs_time_seconds(1), NULL, NULL);
2328         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2329
2330         EXIT;
2331 }
2332
2333 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2334 {
2335         struct ll_sb_info *sbi = ll_s2sbi(sb);
2336         char *profilenm = get_profile_name(sb);
2337         int err;
2338         __u32 read_only;
2339
2340         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2341                 read_only = *flags & MS_RDONLY;
2342                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2343                                          sizeof(KEY_READ_ONLY),
2344                                          KEY_READ_ONLY, sizeof(read_only),
2345                                          &read_only, NULL);
2346                 if (err) {
2347                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2348                                       profilenm, read_only ?
2349                                       "read-only" : "read-write", err);
2350                         return err;
2351                 }
2352
2353                 if (read_only)
2354                         sb->s_flags |= MS_RDONLY;
2355                 else
2356                         sb->s_flags &= ~MS_RDONLY;
2357
2358                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2359                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2360                                       read_only ?  "read-only" : "read-write");
2361         }
2362         return 0;
2363 }
2364
2365 /**
2366  * Cleanup the open handle that is cached on MDT-side.
2367  *
2368  * For open case, the client side open handling thread may hit error
2369  * after the MDT grant the open. Under such case, the client should
2370  * send close RPC to the MDT as cleanup; otherwise, the open handle
2371  * on the MDT will be leaked there until the client umount or evicted.
2372  *
2373  * In further, if someone unlinked the file, because the open handle
2374  * holds the reference on such file/object, then it will block the
2375  * subsequent threads that want to locate such object via FID.
2376  *
2377  * \param[in] sb        super block for this file-system
2378  * \param[in] open_req  pointer to the original open request
2379  */
2380 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2381 {
2382         struct mdt_body                 *body;
2383         struct md_op_data               *op_data;
2384         struct ptlrpc_request           *close_req = NULL;
2385         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2386         ENTRY;
2387
2388         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2389         OBD_ALLOC_PTR(op_data);
2390         if (op_data == NULL) {
2391                 CWARN("%s: cannot allocate op_data to release open handle for "
2392                       DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2393
2394                 RETURN_EXIT;
2395         }
2396
2397         op_data->op_fid1 = body->mbo_fid1;
2398         op_data->op_open_handle = body->mbo_open_handle;
2399         op_data->op_mod_time = ktime_get_real_seconds();
2400         md_close(exp, op_data, NULL, &close_req);
2401         ptlrpc_req_finished(close_req);
2402         ll_finish_md_op_data(op_data);
2403
2404         EXIT;
2405 }
2406
2407 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2408                   struct super_block *sb, struct lookup_intent *it)
2409 {
2410         struct ll_sb_info *sbi = NULL;
2411         struct lustre_md md = { NULL };
2412         int rc;
2413         ENTRY;
2414
2415         LASSERT(*inode || sb);
2416         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2417         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2418                               sbi->ll_md_exp, &md);
2419         if (rc != 0)
2420                 GOTO(out, rc);
2421
2422         if (*inode) {
2423                 rc = ll_update_inode(*inode, &md);
2424                 if (rc != 0)
2425                         GOTO(out, rc);
2426         } else {
2427                 LASSERT(sb != NULL);
2428
2429                 /*
2430                  * At this point server returns to client's same fid as client
2431                  * generated for creating. So using ->fid1 is okay here.
2432                  */
2433                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2434                         CERROR("%s: Fid is insane "DFID"\n",
2435                                 sbi->ll_fsname,
2436                                 PFID(&md.body->mbo_fid1));
2437                         GOTO(out, rc = -EINVAL);
2438                 }
2439
2440                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2441                                              sbi->ll_flags & LL_SBI_32BIT_API),
2442                                  &md);
2443                 if (IS_ERR(*inode)) {
2444 #ifdef CONFIG_FS_POSIX_ACL
2445                         if (md.posix_acl) {
2446                                 posix_acl_release(md.posix_acl);
2447                                 md.posix_acl = NULL;
2448                         }
2449 #endif
2450                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2451                         *inode = NULL;
2452                         CERROR("new_inode -fatal: rc %d\n", rc);
2453                         GOTO(out, rc);
2454                 }
2455         }
2456
2457         /* Handling piggyback layout lock.
2458          * Layout lock can be piggybacked by getattr and open request.
2459          * The lsm can be applied to inode only if it comes with a layout lock
2460          * otherwise correct layout may be overwritten, for example:
2461          * 1. proc1: mdt returns a lsm but not granting layout
2462          * 2. layout was changed by another client
2463          * 3. proc2: refresh layout and layout lock granted
2464          * 4. proc1: to apply a stale layout */
2465         if (it != NULL && it->it_lock_mode != 0) {
2466                 struct lustre_handle lockh;
2467                 struct ldlm_lock *lock;
2468
2469                 lockh.cookie = it->it_lock_handle;
2470                 lock = ldlm_handle2lock(&lockh);
2471                 LASSERT(lock != NULL);
2472                 if (ldlm_has_layout(lock)) {
2473                         struct cl_object_conf conf;
2474
2475                         memset(&conf, 0, sizeof(conf));
2476                         conf.coc_opc = OBJECT_CONF_SET;
2477                         conf.coc_inode = *inode;
2478                         conf.coc_lock = lock;
2479                         conf.u.coc_layout = md.layout;
2480                         (void)ll_layout_conf(*inode, &conf);
2481                 }
2482                 LDLM_LOCK_PUT(lock);
2483         }
2484
2485         GOTO(out, rc = 0);
2486
2487 out:
2488         /* cleanup will be done if necessary */
2489         md_free_lustre_md(sbi->ll_md_exp, &md);
2490
2491         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2492                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2493
2494         return rc;
2495 }
2496
2497 int ll_obd_statfs(struct inode *inode, void __user *arg)
2498 {
2499         struct ll_sb_info *sbi = NULL;
2500         struct obd_export *exp;
2501         char *buf = NULL;
2502         struct obd_ioctl_data *data = NULL;
2503         __u32 type;
2504         int len = 0, rc;
2505
2506         if (!inode || !(sbi = ll_i2sbi(inode)))
2507                 GOTO(out_statfs, rc = -EINVAL);
2508
2509         rc = obd_ioctl_getdata(&buf, &len, arg);
2510         if (rc)
2511                 GOTO(out_statfs, rc);
2512
2513         data = (void*)buf;
2514         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2515             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2516                 GOTO(out_statfs, rc = -EINVAL);
2517
2518         if (data->ioc_inllen1 != sizeof(__u32) ||
2519             data->ioc_inllen2 != sizeof(__u32) ||
2520             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2521             data->ioc_plen2 != sizeof(struct obd_uuid))
2522                 GOTO(out_statfs, rc = -EINVAL);
2523
2524         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2525         if (type & LL_STATFS_LMV)
2526                 exp = sbi->ll_md_exp;
2527         else if (type & LL_STATFS_LOV)
2528                 exp = sbi->ll_dt_exp;
2529         else
2530                 GOTO(out_statfs, rc = -ENODEV);
2531
2532         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2533         if (rc)
2534                 GOTO(out_statfs, rc);
2535 out_statfs:
2536         OBD_FREE_LARGE(buf, len);
2537         return rc;
2538 }
2539
2540 /*
2541  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2542  * be called early to avoid deadlock.
2543  */
2544 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2545 {
2546         if (op_data->op_mea2_sem) {
2547                 up_read(op_data->op_mea2_sem);
2548                 op_data->op_mea2_sem = NULL;
2549         }
2550
2551         if (op_data->op_mea1_sem) {
2552                 up_read(op_data->op_mea1_sem);
2553                 op_data->op_mea1_sem = NULL;
2554         }
2555 }
2556
2557 /* this function prepares md_op_data hint for passing it down to MD stack. */
2558 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2559                                       struct inode *i1, struct inode *i2,
2560                                       const char *name, size_t namelen,
2561                                       __u32 mode, __u32 opc, void *data)
2562 {
2563         LASSERT(i1 != NULL);
2564
2565         if (name == NULL) {
2566                 /* Do not reuse namelen for something else. */
2567                 if (namelen != 0)
2568                         return ERR_PTR(-EINVAL);
2569         } else {
2570                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2571                         return ERR_PTR(-ENAMETOOLONG);
2572
2573                 if (!lu_name_is_valid_2(name, namelen))
2574                         return ERR_PTR(-EINVAL);
2575         }
2576
2577         if (op_data == NULL)
2578                 OBD_ALLOC_PTR(op_data);
2579
2580         if (op_data == NULL)
2581                 return ERR_PTR(-ENOMEM);
2582
2583         ll_i2gids(op_data->op_suppgids, i1, i2);
2584         op_data->op_fid1 = *ll_inode2fid(i1);
2585         op_data->op_default_stripe_offset = -1;
2586
2587         if (S_ISDIR(i1->i_mode)) {
2588                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2589                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2590                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2591                 if (opc == LUSTRE_OPC_MKDIR)
2592                         op_data->op_default_stripe_offset =
2593                                    ll_i2info(i1)->lli_def_stripe_offset;
2594         }
2595
2596         if (i2) {
2597                 op_data->op_fid2 = *ll_inode2fid(i2);
2598                 if (S_ISDIR(i2->i_mode)) {
2599                         if (i2 != i1) {
2600                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2601                                 op_data->op_mea2_sem =
2602                                                 &ll_i2info(i2)->lli_lsm_sem;
2603                         }
2604                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2605                 }
2606         } else {
2607                 fid_zero(&op_data->op_fid2);
2608         }
2609
2610         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2611                 op_data->op_cli_flags |= CLI_HASH64;
2612
2613         if (ll_need_32bit_api(ll_i2sbi(i1)))
2614                 op_data->op_cli_flags |= CLI_API32;
2615
2616         op_data->op_name = name;
2617         op_data->op_namelen = namelen;
2618         op_data->op_mode = mode;
2619         op_data->op_mod_time = ktime_get_real_seconds();
2620         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2621         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2622         op_data->op_cap = cfs_curproc_cap_pack();
2623         op_data->op_mds = 0;
2624         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2625              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2626                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2627         }
2628         op_data->op_data = data;
2629
2630         return op_data;
2631 }
2632
2633 void ll_finish_md_op_data(struct md_op_data *op_data)
2634 {
2635         ll_unlock_md_op_lsm(op_data);
2636         security_release_secctx(op_data->op_file_secctx,
2637                                 op_data->op_file_secctx_size);
2638         OBD_FREE_PTR(op_data);
2639 }
2640
2641 #ifdef HAVE_SUPEROPS_USE_DENTRY
2642 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2643 #else
2644 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2645 #endif
2646 {
2647         struct ll_sb_info *sbi;
2648
2649 #ifdef HAVE_SUPEROPS_USE_DENTRY
2650         LASSERT((seq != NULL) && (dentry != NULL));
2651         sbi = ll_s2sbi(dentry->d_sb);
2652 #else
2653         LASSERT((seq != NULL) && (vfs != NULL));
2654         sbi = ll_s2sbi(vfs->mnt_sb);
2655 #endif
2656
2657         if (sbi->ll_flags & LL_SBI_NOLCK)
2658                 seq_puts(seq, ",nolock");
2659
2660         if (sbi->ll_flags & LL_SBI_FLOCK)
2661                 seq_puts(seq, ",flock");
2662
2663         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2664                 seq_puts(seq, ",localflock");
2665
2666         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2667                 seq_puts(seq, ",user_xattr");
2668
2669         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2670                 seq_puts(seq, ",lazystatfs");
2671
2672         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2673                 seq_puts(seq, ",user_fid2path");
2674
2675         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2676                 seq_puts(seq, ",always_ping");
2677
2678         RETURN(0);
2679 }
2680
2681 /**
2682  * Get obd name by cmd, and copy out to user space
2683  */
2684 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2685 {
2686         struct ll_sb_info *sbi = ll_i2sbi(inode);
2687         struct obd_device *obd;
2688         ENTRY;
2689
2690         if (cmd == OBD_IOC_GETDTNAME)
2691                 obd = class_exp2obd(sbi->ll_dt_exp);
2692         else if (cmd == OBD_IOC_GETMDNAME)
2693                 obd = class_exp2obd(sbi->ll_md_exp);
2694         else
2695                 RETURN(-EINVAL);
2696
2697         if (!obd)
2698                 RETURN(-ENOENT);
2699
2700         if (copy_to_user((void __user *)arg, obd->obd_name,
2701                          strlen(obd->obd_name) + 1))
2702                 RETURN(-EFAULT);
2703
2704         RETURN(0);
2705 }
2706
2707 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2708 {
2709         char *path = NULL;
2710
2711         struct path p;
2712
2713         p.dentry = dentry;
2714         p.mnt = current->fs->root.mnt;
2715         path_get(&p);
2716         path = d_path(&p, buf, bufsize);
2717         path_put(&p);
2718         return path;
2719 }
2720
2721 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2722 {
2723         char *buf, *path = NULL;
2724         struct dentry *dentry = NULL;
2725         struct inode *inode = page->mapping->host;
2726
2727         /* this can be called inside spin lock so use GFP_ATOMIC. */
2728         buf = (char *)__get_free_page(GFP_ATOMIC);
2729         if (buf != NULL) {
2730                 dentry = d_find_alias(page->mapping->host);
2731                 if (dentry != NULL)
2732                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2733         }
2734
2735         CDEBUG(D_WARNING,
2736                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2737                "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
2738                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2739                PFID(ll_inode2fid(inode)),
2740                (path && !IS_ERR(path)) ? path : "", ioret);
2741
2742         if (dentry != NULL)
2743                 dput(dentry);
2744
2745         if (buf != NULL)
2746                 free_page((unsigned long)buf);
2747 }
2748
2749 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2750                         struct lov_user_md **kbuf)
2751 {
2752         struct lov_user_md      lum;
2753         ssize_t                 lum_size;
2754         ENTRY;
2755
2756         if (copy_from_user(&lum, md, sizeof(lum)))
2757                 RETURN(-EFAULT);
2758
2759         lum_size = ll_lov_user_md_size(&lum);
2760         if (lum_size < 0)
2761                 RETURN(lum_size);
2762
2763         OBD_ALLOC(*kbuf, lum_size);
2764         if (*kbuf == NULL)
2765                 RETURN(-ENOMEM);
2766
2767         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2768                 OBD_FREE(*kbuf, lum_size);
2769                 RETURN(-EFAULT);
2770         }
2771
2772         RETURN(lum_size);
2773 }
2774
2775 /*
2776  * Compute llite root squash state after a change of root squash
2777  * configuration setting or add/remove of a lnet nid
2778  */
2779 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2780 {
2781         struct root_squash_info *squash = &sbi->ll_squash;
2782         int i;
2783         bool matched;
2784         struct lnet_process_id id;
2785
2786         /* Update norootsquash flag */
2787         down_write(&squash->rsi_sem);
2788         if (list_empty(&squash->rsi_nosquash_nids))
2789                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2790         else {
2791                 /* Do not apply root squash as soon as one of our NIDs is
2792                  * in the nosquash_nids list */
2793                 matched = false;
2794                 i = 0;
2795                 while (LNetGetId(i++, &id) != -ENOENT) {
2796                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2797                                 continue;
2798                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2799                                 matched = true;
2800                                 break;
2801                         }
2802                 }
2803                 if (matched)
2804                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2805                 else
2806                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2807         }
2808         up_write(&squash->rsi_sem);
2809 }
2810
2811 /**
2812  * Parse linkea content to extract information about a given hardlink
2813  *
2814  * \param[in]   ldata      - Initialized linkea data
2815  * \param[in]   linkno     - Link identifier
2816  * \param[out]  parent_fid - The entry's parent FID
2817  * \param[out]  ln         - Entry name destination buffer
2818  *
2819  * \retval 0 on success
2820  * \retval Appropriate negative error code on failure
2821  */
2822 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2823                             struct lu_fid *parent_fid, struct lu_name *ln)
2824 {
2825         unsigned int    idx;
2826         int             rc;
2827         ENTRY;
2828
2829         rc = linkea_init_with_rec(ldata);
2830         if (rc < 0)
2831                 RETURN(rc);
2832
2833         if (linkno >= ldata->ld_leh->leh_reccount)
2834                 /* beyond last link */
2835                 RETURN(-ENODATA);
2836
2837         linkea_first_entry(ldata);
2838         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2839                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2840                                     parent_fid);
2841                 if (idx == linkno)
2842                         break;
2843
2844                 linkea_next_entry(ldata);
2845         }
2846
2847         if (idx < linkno)
2848                 RETURN(-ENODATA);
2849
2850         RETURN(0);
2851 }
2852
2853 /**
2854  * Get parent FID and name of an identified link. Operation is performed for
2855  * a given link number, letting the caller iterate over linkno to list one or
2856  * all links of an entry.
2857  *
2858  * \param[in]     file - File descriptor against which to perform the operation
2859  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2860  *                       on and the available size. It is eventually filled with
2861  *                       the requested information or left untouched on error
2862  *
2863  * \retval - 0 on success
2864  * \retval - Appropriate negative error code on failure
2865  */
2866 int ll_getparent(struct file *file, struct getparent __user *arg)
2867 {
2868         struct inode            *inode = file_inode(file);
2869         struct linkea_data      *ldata;
2870         struct lu_buf            buf = LU_BUF_NULL;
2871         struct lu_name           ln;
2872         struct lu_fid            parent_fid;
2873         __u32                    linkno;
2874         __u32                    name_size;
2875         int                      rc;
2876
2877         ENTRY;
2878
2879         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2880             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2881                 RETURN(-EPERM);
2882
2883         if (get_user(name_size, &arg->gp_name_size))
2884                 RETURN(-EFAULT);
2885
2886         if (get_user(linkno, &arg->gp_linkno))
2887                 RETURN(-EFAULT);
2888
2889         if (name_size > PATH_MAX)
2890                 RETURN(-EINVAL);
2891
2892         OBD_ALLOC(ldata, sizeof(*ldata));
2893         if (ldata == NULL)
2894                 RETURN(-ENOMEM);
2895
2896         rc = linkea_data_new(ldata, &buf);
2897         if (rc < 0)
2898                 GOTO(ldata_free, rc);
2899
2900 #ifdef HAVE_XATTR_HANDLER_FLAGS
2901         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2902                            buf.lb_len, OBD_MD_FLXATTR);
2903 #else
2904         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2905                          buf.lb_len);
2906 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2907         if (rc < 0)
2908                 GOTO(lb_free, rc);
2909
2910         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2911         if (rc < 0)
2912                 GOTO(lb_free, rc);
2913
2914         if (ln.ln_namelen >= name_size)
2915                 GOTO(lb_free, rc = -EOVERFLOW);
2916
2917         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2918                 GOTO(lb_free, rc = -EFAULT);
2919
2920         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2921                 GOTO(lb_free, rc = -EFAULT);
2922
2923         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2924                 GOTO(lb_free, rc = -EFAULT);
2925
2926 lb_free:
2927         lu_buf_free(&buf);
2928 ldata_free:
2929         OBD_FREE(ldata, sizeof(*ldata));
2930
2931         RETURN(rc);
2932 }