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  *
  31  * lustre/llite/llite_lib.c
  32  *
  33  * Lustre Light Super operations
  34  */
  35
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/cpu.h>
  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 #include <linux/delay.h>
  49 #include <linux/uidgid.h>
  50 #include <linux/fs_struct.h>
  51
  52 #ifndef HAVE_CPUS_READ_LOCK
  53 #include <libcfs/linux/linux-cpu.h>
  54 #endif
  55 #include <uapi/linux/lustre/lustre_ioctl.h>
  56 #ifdef HAVE_UAPI_LINUX_MOUNT_H
  57 #include <uapi/linux/mount.h>
  58 #endif
  59
  60 #include <lustre_ha.h>
  61 #include <lustre_dlm.h>
  62 #include <lprocfs_status.h>
  63 #include <lustre_disk.h>
  64 #include <uapi/linux/lustre/lustre_param.h>
  65 #include <lustre_log.h>
  66 #include <cl_object.h>
  67 #include <obd_cksum.h>
  68 #include "llite_internal.h"
  69
  70 struct kmem_cache *ll_file_data_slab;
  71
  72 #ifndef log2
  73 #define log2(n) ffz(~(n))
  74 #endif
  75
  76 /**
  77  * If there is only one number of core visible to Lustre,
  78  * async readahead will be disabled, to avoid massive over
  79  * subscription, we use 1/2 of active cores as default max
  80  * async readahead requests.
  81  */
  82 static inline unsigned int ll_get_ra_async_max_active(void)
  83 {
  84         return cfs_cpt_weight(cfs_cpt_tab, CFS_CPT_ANY) >> 1;
  85 }
  86
  87 static struct ll_sb_info *ll_init_sbi(void)
  88 {
  89         struct ll_sb_info *sbi = NULL;
  90         unsigned long pages;
  91         unsigned long lru_page_max;
  92         struct sysinfo si;
  93         int rc;
  94         int i;
  95
  96         ENTRY;
  97
  98         OBD_ALLOC_PTR(sbi);
  99         if (sbi == NULL)
 100                 RETURN(ERR_PTR(-ENOMEM));
 101
 102         rc = pcc_super_init(&sbi->ll_pcc_super);
 103         if (rc < 0)
 104                 GOTO(out_sbi, rc);
 105
 106         spin_lock_init(&sbi->ll_lock);
 107         mutex_init(&sbi->ll_lco.lco_lock);
 108         spin_lock_init(&sbi->ll_pp_extent_lock);
 109         spin_lock_init(&sbi->ll_process_lock);
 110         sbi->ll_rw_stats_on = 0;
 111         sbi->ll_statfs_max_age = OBD_STATFS_CACHE_SECONDS;
 112
 113         si_meminfo(&si);
 114         pages = si.totalram - si.totalhigh;
 115         lru_page_max = pages / 2;
 116
 117         sbi->ll_ra_info.ra_async_max_active = ll_get_ra_async_max_active();
 118         sbi->ll_ra_info.ll_readahead_wq =
 119                 cfs_cpt_bind_workqueue("ll-readahead-wq", cfs_cpt_tab,
 120                                        0, CFS_CPT_ANY,
 121                                        sbi->ll_ra_info.ra_async_max_active);
 122         if (IS_ERR(sbi->ll_ra_info.ll_readahead_wq))
 123                 GOTO(out_pcc, rc = PTR_ERR(sbi->ll_ra_info.ll_readahead_wq));
 124
 125         /* initialize ll_cache data */
 126         sbi->ll_cache = cl_cache_init(lru_page_max);
 127         if (sbi->ll_cache == NULL)
 128                 GOTO(out_destroy_ra, rc = -ENOMEM);
 129
 130         /* initialize foreign symlink prefix path */
 131         OBD_ALLOC(sbi->ll_foreign_symlink_prefix, sizeof("/mnt/"));
 132         if (sbi->ll_foreign_symlink_prefix == NULL)
 133                 GOTO(out_destroy_ra, rc = -ENOMEM);
 134         memcpy(sbi->ll_foreign_symlink_prefix, "/mnt/", sizeof("/mnt/"));
 135         sbi->ll_foreign_symlink_prefix_size = sizeof("/mnt/");
 136
 137         /* initialize foreign symlink upcall path, none by default */
 138         OBD_ALLOC(sbi->ll_foreign_symlink_upcall, sizeof("none"));
 139         if (sbi->ll_foreign_symlink_upcall == NULL)
 140                 GOTO(out_destroy_ra, rc = -ENOMEM);
 141         memcpy(sbi->ll_foreign_symlink_upcall, "none", sizeof("none"));
 142         sbi->ll_foreign_symlink_upcall_items = NULL;
 143         sbi->ll_foreign_symlink_upcall_nb_items = 0;
 144         init_rwsem(&sbi->ll_foreign_symlink_sem);
 145         /* foreign symlink support (LL_SBI_FOREIGN_SYMLINK in ll_flags)
 146          * not enabled by default
 147          */
 148
 149         sbi->ll_ra_info.ra_max_pages =
 150                 min(pages / 32, SBI_DEFAULT_READ_AHEAD_MAX);
 151         sbi->ll_ra_info.ra_max_pages_per_file =
 152                 min(sbi->ll_ra_info.ra_max_pages / 4,
 153                     SBI_DEFAULT_READ_AHEAD_PER_FILE_MAX);
 154         sbi->ll_ra_info.ra_async_pages_per_file_threshold =
 155                                 sbi->ll_ra_info.ra_max_pages_per_file;
 156         sbi->ll_ra_info.ra_range_pages = SBI_DEFAULT_RA_RANGE_PAGES;
 157         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 158         atomic_set(&sbi->ll_ra_info.ra_async_inflight, 0);
 159
 160         sbi->ll_flags |= LL_SBI_VERBOSE;
 161 #ifdef ENABLE_CHECKSUM
 162         sbi->ll_flags |= LL_SBI_CHECKSUM;
 163 #endif
 164 #ifdef ENABLE_FLOCK
 165         sbi->ll_flags |= LL_SBI_FLOCK;
 166 #endif
 167
 168 #ifdef HAVE_LRU_RESIZE_SUPPORT
 169         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 170 #endif
 171         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 172
 173         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 174                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 175                                pp_r_hist.oh_lock);
 176                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 177                                pp_w_hist.oh_lock);
 178         }
 179
 180         /* metadata statahead is enabled by default */
 181         sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
 182         sbi->ll_sa_max = LL_SA_RPC_DEF;
 183         atomic_set(&sbi->ll_sa_total, 0);
 184         atomic_set(&sbi->ll_sa_wrong, 0);
 185         atomic_set(&sbi->ll_sa_running, 0);
 186         atomic_set(&sbi->ll_agl_total, 0);
 187         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 188         sbi->ll_flags |= LL_SBI_FAST_READ;
 189         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 190         sbi->ll_flags |= LL_SBI_PARALLEL_DIO;
 191         ll_sbi_set_encrypt(sbi, true);
 192
 193         /* root squash */
 194         sbi->ll_squash.rsi_uid = 0;
 195         sbi->ll_squash.rsi_gid = 0;
 196         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 197         spin_lock_init(&sbi->ll_squash.rsi_lock);
 198
 199         /* Per-filesystem file heat */
 200         sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
 201         sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
 202
 203         /* Per-fs open heat level before requesting open lock */
 204         sbi->ll_oc_thrsh_count = SBI_DEFAULT_OPENCACHE_THRESHOLD_COUNT;
 205         sbi->ll_oc_max_ms = SBI_DEFAULT_OPENCACHE_THRESHOLD_MAX_MS;
 206         sbi->ll_oc_thrsh_ms = SBI_DEFAULT_OPENCACHE_THRESHOLD_MS;
 207         RETURN(sbi);
 208 out_destroy_ra:
 209         if (sbi->ll_foreign_symlink_prefix)
 210                 OBD_FREE(sbi->ll_foreign_symlink_prefix, sizeof("/mnt/"));
 211         if (sbi->ll_cache) {
 212                 cl_cache_decref(sbi->ll_cache);
 213                 sbi->ll_cache = NULL;
 214         }
 215         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 216 out_pcc:
 217         pcc_super_fini(&sbi->ll_pcc_super);
 218 out_sbi:
 219         OBD_FREE_PTR(sbi);
 220         RETURN(ERR_PTR(rc));
 221 }
 222
 223 static void ll_free_sbi(struct super_block *sb)
 224 {
 225         struct ll_sb_info *sbi = ll_s2sbi(sb);
 226         ENTRY;
 227
 228         if (sbi != NULL) {
 229                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 230                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 231                 if (sbi->ll_ra_info.ll_readahead_wq)
 232                         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 233                 if (sbi->ll_cache != NULL) {
 234                         cl_cache_decref(sbi->ll_cache);
 235                         sbi->ll_cache = NULL;
 236                 }
 237                 if (sbi->ll_foreign_symlink_prefix) {
 238                         OBD_FREE(sbi->ll_foreign_symlink_prefix,
 239                                  sbi->ll_foreign_symlink_prefix_size);
 240                         sbi->ll_foreign_symlink_prefix = NULL;
 241                 }
 242                 if (sbi->ll_foreign_symlink_upcall) {
 243                         OBD_FREE(sbi->ll_foreign_symlink_upcall,
 244                                  strlen(sbi->ll_foreign_symlink_upcall) +
 245                                        1);
 246                         sbi->ll_foreign_symlink_upcall = NULL;
 247                 }
 248                 if (sbi->ll_foreign_symlink_upcall_items) {
 249                         int i;
 250                         int nb_items = sbi->ll_foreign_symlink_upcall_nb_items;
 251                         struct ll_foreign_symlink_upcall_item *items =
 252                                 sbi->ll_foreign_symlink_upcall_items;
 253
 254                         for (i = 0 ; i < nb_items; i++)
 255                                 if (items[i].type == STRING_TYPE)
 256                                         OBD_FREE(items[i].string,
 257                                                        items[i].size);
 258
 259                         OBD_FREE_LARGE(items, nb_items *
 260                                 sizeof(struct ll_foreign_symlink_upcall_item));
 261                         sbi->ll_foreign_symlink_upcall_items = NULL;
 262                 }
 263                 pcc_super_fini(&sbi->ll_pcc_super);
 264                 OBD_FREE(sbi, sizeof(*sbi));
 265         }
 266         EXIT;
 267 }
 268
 269 static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 270 {
 271         struct inode *root = NULL;
 272         struct ll_sb_info *sbi = ll_s2sbi(sb);
 273         struct obd_statfs *osfs = NULL;
 274         struct ptlrpc_request *request = NULL;
 275         struct obd_connect_data *data = NULL;
 276         struct obd_uuid *uuid;
 277         struct md_op_data *op_data;
 278         struct lustre_md lmd;
 279         u64 valid;
 280         int size, err, checksum;
 281
 282         ENTRY;
 283         sbi->ll_md_obd = class_name2obd(md);
 284         if (!sbi->ll_md_obd) {
 285                 CERROR("MD %s: not setup or attached\n", md);
 286                 RETURN(-EINVAL);
 287         }
 288
 289         OBD_ALLOC_PTR(data);
 290         if (data == NULL)
 291                 RETURN(-ENOMEM);
 292
 293         OBD_ALLOC_PTR(osfs);
 294         if (osfs == NULL) {
 295                 OBD_FREE_PTR(data);
 296                 RETURN(-ENOMEM);
 297         }
 298
 299         /* pass client page size via ocd_grant_blkbits, the server should report
 300          * back its backend blocksize for grant calculation purpose */
 301         data->ocd_grant_blkbits = PAGE_SHIFT;
 302
 303         /* indicate MDT features supported by this client */
 304         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 305                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 306                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 307                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 308                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 309                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 310                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 311                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 312                                   OBD_CONNECT_64BITHASH |
 313                                   OBD_CONNECT_EINPROGRESS |
 314                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 315                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 316                                   OBD_CONNECT_MAX_EASIZE |
 317                                   OBD_CONNECT_FLOCK_DEAD |
 318                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 319                                   OBD_CONNECT_OPEN_BY_FID |
 320                                   OBD_CONNECT_DIR_STRIPE |
 321                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 322                                   OBD_CONNECT_SUBTREE |
 323                                   OBD_CONNECT_MULTIMODRPCS |
 324                                   OBD_CONNECT_GRANT_PARAM |
 325                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 326
 327         data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
 328                                    OBD_CONNECT2_SUM_STATFS |
 329                                    OBD_CONNECT2_OVERSTRIPING |
 330                                    OBD_CONNECT2_FLR |
 331                                    OBD_CONNECT2_LOCK_CONVERT |
 332                                    OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 333                                    OBD_CONNECT2_INC_XID |
 334                                    OBD_CONNECT2_LSOM |
 335                                    OBD_CONNECT2_ASYNC_DISCARD |
 336                                    OBD_CONNECT2_PCC |
 337                                    OBD_CONNECT2_CRUSH | OBD_CONNECT2_LSEEK |
 338                                    OBD_CONNECT2_GETATTR_PFID |
 339                                    OBD_CONNECT2_DOM_LVB |
 340                                    OBD_CONNECT2_REP_MBITS |
 341                                    OBD_CONNECT2_ATOMIC_OPEN_LOCK;
 342
 343 #ifdef HAVE_LRU_RESIZE_SUPPORT
 344         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 345                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 346 #endif
 347         data->ocd_connect_flags |= OBD_CONNECT_ACL_FLAGS;
 348
 349         data->ocd_cksum_types = obd_cksum_types_supported_client();
 350
 351         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 352                 /* flag mdc connection as lightweight, only used for test
 353                  * purpose, use with care */
 354                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 355
 356         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 357         data->ocd_version = LUSTRE_VERSION_CODE;
 358
 359         if (sb->s_flags & SB_RDONLY)
 360                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 361         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 362                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 363
 364 #ifdef SB_NOSEC
 365         /* Setting this indicates we correctly support S_NOSEC (See kernel
 366          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 367          */
 368         sb->s_flags |= SB_NOSEC;
 369 #endif
 370         sbi->ll_fop = ll_select_file_operations(sbi);
 371
 372         /* always ping even if server suppress_pings */
 373         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 374                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 375
 376         obd_connect_set_secctx(data);
 377         if (ll_sbi_has_encrypt(sbi))
 378                 obd_connect_set_enc(data);
 379
 380 #if defined(CONFIG_SECURITY)
 381         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 382 #endif
 383
 384         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 385
 386         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 387                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 388         if (err == -EBUSY) {
 389                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 390                                    "recovery, of which this client is not a "
 391                                    "part. Please wait for recovery to complete,"
 392                                    " abort, or time out.\n", md);
 393                 GOTO(out, err);
 394         } else if (err) {
 395                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 396                 GOTO(out, err);
 397         }
 398
 399         sbi->ll_md_exp->exp_connect_data = *data;
 400
 401         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 402                            LUSTRE_SEQ_METADATA);
 403         if (err) {
 404                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 405                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 406                 GOTO(out_md, err);
 407         }
 408
 409         /* For mount, we only need fs info from MDT0, and also in DNE, it
 410          * can make sure the client can be mounted as long as MDT0 is
 411          * avaible */
 412         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 413                         ktime_get_seconds() - sbi->ll_statfs_max_age,
 414                         OBD_STATFS_FOR_MDT0);
 415         if (err)
 416                 GOTO(out_md_fid, err);
 417
 418         /* This needs to be after statfs to ensure connect has finished.
 419          * Note that "data" does NOT contain the valid connect reply.
 420          * If connecting to a 1.8 server there will be no LMV device, so
 421          * we can access the MDC export directly and exp_connect_flags will
 422          * be non-zero, but if accessing an upgraded 2.1 server it will
 423          * have the correct flags filled in.
 424          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 425         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 426         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 427             valid != CLIENT_CONNECT_MDT_REQD) {
 428                 char *buf;
 429
 430                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 431                 obd_connect_flags2str(buf, PAGE_SIZE,
 432                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 433                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 434                                    "feature(s) needed for correct operation "
 435                                    "of this client (%s). Please upgrade "
 436                                    "server or downgrade client.\n",
 437                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 438                 OBD_FREE(buf, PAGE_SIZE);
 439                 GOTO(out_md_fid, err = -EPROTO);
 440         }
 441
 442         size = sizeof(*data);
 443         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 444                            KEY_CONN_DATA,  &size, data);
 445         if (err) {
 446                 CERROR("%s: Get connect data failed: rc = %d\n",
 447                        sbi->ll_md_exp->exp_obd->obd_name, err);
 448                 GOTO(out_md_fid, err);
 449         }
 450
 451         LASSERT(osfs->os_bsize);
 452         sb->s_blocksize = osfs->os_bsize;
 453         sb->s_blocksize_bits = log2(osfs->os_bsize);
 454         sb->s_magic = LL_SUPER_MAGIC;
 455         sb->s_maxbytes = MAX_LFS_FILESIZE;
 456         sbi->ll_namelen = osfs->os_namelen;
 457         sbi->ll_mnt.mnt = current->fs->root.mnt;
 458
 459         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 460             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 461                 LCONSOLE_INFO("Disabling user_xattr feature because "
 462                               "it is not supported on the server\n");
 463                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 464         }
 465
 466         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 467 #ifdef SB_POSIXACL
 468                 sb->s_flags |= SB_POSIXACL;
 469 #endif
 470                 sbi->ll_flags |= LL_SBI_ACL;
 471         } else {
 472                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 473 #ifdef SB_POSIXACL
 474                 sb->s_flags &= ~SB_POSIXACL;
 475 #endif
 476                 sbi->ll_flags &= ~LL_SBI_ACL;
 477         }
 478
 479         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 480                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 481
 482         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 483                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 484
 485         if (obd_connect_has_secctx(data))
 486                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 487
 488         if (ll_sbi_has_encrypt(sbi) && !obd_connect_has_enc(data)) {
 489                 if (ll_sbi_has_test_dummy_encryption(sbi))
 490                         LCONSOLE_WARN("%s: server %s does not support encryption feature, encryption deactivated.\n",
 491                                       sbi->ll_fsname,
 492                                       sbi->ll_md_exp->exp_obd->obd_name);
 493                 ll_sbi_set_encrypt(sbi, false);
 494         }
 495
 496         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 497                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 498                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 499                                       "unknown maximum xattr size.\n", dt);
 500                 } else if (!sbi->ll_xattr_cache_set) {
 501                         /* If xattr_cache is already set (no matter 0 or 1)
 502                          * during processing llog, it won't be enabled here. */
 503                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 504                         sbi->ll_xattr_cache_enabled = 1;
 505                 }
 506         }
 507
 508         sbi->ll_dt_obd = class_name2obd(dt);
 509         if (!sbi->ll_dt_obd) {
 510                 CERROR("DT %s: not setup or attached\n", dt);
 511                 GOTO(out_md_fid, err = -ENODEV);
 512         }
 513
 514         /* pass client page size via ocd_grant_blkbits, the server should report
 515          * back its backend blocksize for grant calculation purpose */
 516         data->ocd_grant_blkbits = PAGE_SHIFT;
 517
 518         /* indicate OST features supported by this client */
 519         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 520                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 521                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 522                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 523                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 524                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 525                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 526                                   OBD_CONNECT_EINPROGRESS |
 527                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 528                                   OBD_CONNECT_LAYOUTLOCK |
 529                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 530                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 531                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 532         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD |
 533                                    OBD_CONNECT2_INC_XID | OBD_CONNECT2_LSEEK |
 534                                    OBD_CONNECT2_REP_MBITS;
 535
 536         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 537                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 538
 539         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 540          * disabled by default, because it can still be enabled on the
 541          * fly via /sys. As a consequence, we still need to come to an
 542          * agreement on the supported algorithms at connect time
 543          */
 544         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 545
 546         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 547                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 548         else
 549                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 550
 551 #ifdef HAVE_LRU_RESIZE_SUPPORT
 552         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 553 #endif
 554         /* always ping even if server suppress_pings */
 555         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 556                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 557
 558         if (ll_sbi_has_encrypt(sbi))
 559                 obd_connect_set_enc(data);
 560
 561         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 562                "ocd_grant: %d\n", data->ocd_connect_flags,
 563                data->ocd_version, data->ocd_grant);
 564
 565         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 566         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 567
 568         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 569
 570         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 571                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 572         if (err == -EBUSY) {
 573                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 574                                    "recovery, of which this client is not a "
 575                                    "part.  Please wait for recovery to "
 576                                    "complete, abort, or time out.\n", dt);
 577                 GOTO(out_md, err);
 578         } else if (err) {
 579                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 580                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 581                 GOTO(out_md, err);
 582         }
 583
 584         if (ll_sbi_has_encrypt(sbi) &&
 585             !obd_connect_has_enc(&sbi->ll_dt_obd->u.lov.lov_ocd)) {
 586                 if (ll_sbi_has_test_dummy_encryption(sbi))
 587                         LCONSOLE_WARN("%s: server %s does not support encryption feature, encryption deactivated.\n",
 588                                       sbi->ll_fsname, dt);
 589                 ll_sbi_set_encrypt(sbi, false);
 590         } else if (ll_sbi_has_test_dummy_encryption(sbi)) {
 591                 LCONSOLE_WARN("Test dummy encryption mode enabled\n");
 592         }
 593
 594         sbi->ll_dt_exp->exp_connect_data = *data;
 595
 596         /* Don't change value if it was specified in the config log */
 597         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
 598                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 599                         max_t(unsigned long, SBI_DEFAULT_READ_AHEAD_WHOLE_MAX,
 600                               (data->ocd_brw_size >> PAGE_SHIFT));
 601                 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
 602                     sbi->ll_ra_info.ra_max_pages_per_file)
 603                         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 604                                 sbi->ll_ra_info.ra_max_pages_per_file;
 605         }
 606
 607         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 608                            LUSTRE_SEQ_METADATA);
 609         if (err) {
 610                 CERROR("%s: Can't init data layer FID infrastructure, "
 611                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 612                 GOTO(out_dt, err);
 613         }
 614
 615         mutex_lock(&sbi->ll_lco.lco_lock);
 616         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 617         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 618         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 619         mutex_unlock(&sbi->ll_lco.lco_lock);
 620
 621         fid_zero(&sbi->ll_root_fid);
 622         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 623                            &sbi->ll_root_fid);
 624         if (err) {
 625                 CERROR("cannot mds_connect: rc = %d\n", err);
 626                 GOTO(out_lock_cn_cb, err);
 627         }
 628         if (!fid_is_sane(&sbi->ll_root_fid)) {
 629                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 630                        sbi->ll_md_exp->exp_obd->obd_name,
 631                        PFID(&sbi->ll_root_fid));
 632                 GOTO(out_lock_cn_cb, err = -EINVAL);
 633         }
 634         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 635
 636         sb->s_op = &lustre_super_operations;
 637         sb->s_xattr = ll_xattr_handlers;
 638 #if THREAD_SIZE >= 8192 /*b=17630*/
 639         sb->s_export_op = &lustre_export_operations;
 640 #endif
 641 #ifdef HAVE_LUSTRE_CRYPTO
 642         llcrypt_set_ops(sb, &lustre_cryptops);
 643 #endif
 644
 645         /* make root inode
 646          * XXX: move this to after cbd setup? */
 647         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 648         if (sbi->ll_flags & LL_SBI_ACL)
 649                 valid |= OBD_MD_FLACL;
 650
 651         OBD_ALLOC_PTR(op_data);
 652         if (op_data == NULL)
 653                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 654
 655         op_data->op_fid1 = sbi->ll_root_fid;
 656         op_data->op_mode = 0;
 657         op_data->op_valid = valid;
 658
 659         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 660
 661         OBD_FREE_PTR(op_data);
 662         if (err) {
 663                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 664                        sbi->ll_md_exp->exp_obd->obd_name, err);
 665                 GOTO(out_lock_cn_cb, err);
 666         }
 667
 668         err = md_get_lustre_md(sbi->ll_md_exp, &request->rq_pill,
 669                                sbi->ll_dt_exp, sbi->ll_md_exp, &lmd);
 670         if (err) {
 671                 CERROR("failed to understand root inode md: rc = %d\n", err);
 672                 ptlrpc_req_finished(request);
 673                 GOTO(out_lock_cn_cb, err);
 674         }
 675
 676         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 677         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 678                                             sbi->ll_flags & LL_SBI_32BIT_API),
 679                        &lmd);
 680         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 681         ptlrpc_req_finished(request);
 682
 683         if (IS_ERR(root)) {
 684                 lmd_clear_acl(&lmd);
 685                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 686                 root = NULL;
 687                 CERROR("%s: bad ll_iget() for root: rc = %d\n",
 688                        sbi->ll_fsname, err);
 689                 GOTO(out_root, err);
 690         }
 691
 692         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 693         if (sbi->ll_checksum_set) {
 694                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 695                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 696                                          sizeof(checksum), &checksum, NULL);
 697                 if (err) {
 698                         CERROR("%s: Set checksum failed: rc = %d\n",
 699                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 700                         GOTO(out_root, err);
 701                 }
 702         }
 703         cl_sb_init(sb);
 704
 705         sb->s_root = d_make_root(root);
 706         if (sb->s_root == NULL) {
 707                 err = -ENOMEM;
 708                 CERROR("%s: can't make root dentry: rc = %d\n",
 709                        sbi->ll_fsname, err);
 710                 GOTO(out_root, err);
 711         }
 712
 713         sbi->ll_sdev_orig = sb->s_dev;
 714
 715         /* We set sb->s_dev equal on all lustre clients in order to support
 716          * NFS export clustering.  NFSD requires that the FSID be the same
 717          * on all clients. */
 718         /* s_dev is also used in lt_compare() to compare two fs, but that is
 719          * only a node-local comparison. */
 720         uuid = obd_get_uuid(sbi->ll_md_exp);
 721         if (uuid != NULL)
 722                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 723
 724         if (data != NULL)
 725                 OBD_FREE_PTR(data);
 726         if (osfs != NULL)
 727                 OBD_FREE_PTR(osfs);
 728
 729         if (sbi->ll_dt_obd) {
 730                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 731                                         &sbi->ll_dt_obd->obd_kset.kobj,
 732                                         sbi->ll_dt_obd->obd_type->typ_name);
 733                 if (err < 0) {
 734                         CERROR("%s: could not register %s in llite: rc = %d\n",
 735                                dt, sbi->ll_fsname, err);
 736                         err = 0;
 737                 }
 738         }
 739
 740         if (sbi->ll_md_obd) {
 741                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 742                                         &sbi->ll_md_obd->obd_kset.kobj,
 743                                         sbi->ll_md_obd->obd_type->typ_name);
 744                 if (err < 0) {
 745                         CERROR("%s: could not register %s in llite: rc = %d\n",
 746                                md, sbi->ll_fsname, err);
 747                         err = 0;
 748                 }
 749         }
 750
 751         RETURN(err);
 752 out_root:
 753         iput(root);
 754 out_lock_cn_cb:
 755         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 756 out_dt:
 757         obd_disconnect(sbi->ll_dt_exp);
 758         sbi->ll_dt_exp = NULL;
 759         sbi->ll_dt_obd = NULL;
 760 out_md_fid:
 761         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 762 out_md:
 763         obd_disconnect(sbi->ll_md_exp);
 764         sbi->ll_md_exp = NULL;
 765         sbi->ll_md_obd = NULL;
 766 out:
 767         if (data != NULL)
 768                 OBD_FREE_PTR(data);
 769         if (osfs != NULL)
 770                 OBD_FREE_PTR(osfs);
 771         return err;
 772 }
 773
 774 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 775 {
 776         int size, rc;
 777
 778         size = sizeof(*lmmsize);
 779         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 780                           KEY_MAX_EASIZE, &size, lmmsize);
 781         if (rc != 0) {
 782                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 783                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 784                 RETURN(rc);
 785         }
 786
 787         CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
 788
 789         size = sizeof(int);
 790         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 791                           KEY_MAX_EASIZE, &size, lmmsize);
 792         if (rc)
 793                 CERROR("Get max mdsize error rc %d\n", rc);
 794
 795         CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
 796
 797         RETURN(rc);
 798 }
 799
 800 /**
 801  * Get the value of the default_easize parameter.
 802  *
 803  * \see client_obd::cl_default_mds_easize
 804  *
 805  * \param[in] sbi       superblock info for this filesystem
 806  * \param[out] lmmsize  pointer to storage location for value
 807  *
 808  * \retval 0            on success
 809  * \retval negative     negated errno on failure
 810  */
 811 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 812 {
 813         int size, rc;
 814
 815         size = sizeof(int);
 816         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 817                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 818         if (rc)
 819                 CERROR("Get default mdsize error rc %d\n", rc);
 820
 821         RETURN(rc);
 822 }
 823
 824 /**
 825  * Set the default_easize parameter to the given value.
 826  *
 827  * \see client_obd::cl_default_mds_easize
 828  *
 829  * \param[in] sbi       superblock info for this filesystem
 830  * \param[in] lmmsize   the size to set
 831  *
 832  * \retval 0            on success
 833  * \retval negative     negated errno on failure
 834  */
 835 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 836 {
 837         int rc;
 838
 839         if (lmmsize < sizeof(struct lov_mds_md) ||
 840             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 841                 return -EINVAL;
 842
 843         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 844                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 845                                 sizeof(int), &lmmsize, NULL);
 846
 847         RETURN(rc);
 848 }
 849
 850 static void client_common_put_super(struct super_block *sb)
 851 {
 852         struct ll_sb_info *sbi = ll_s2sbi(sb);
 853         ENTRY;
 854
 855         cl_sb_fini(sb);
 856
 857         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 858         obd_disconnect(sbi->ll_dt_exp);
 859         sbi->ll_dt_exp = NULL;
 860
 861         ll_debugfs_unregister_super(sb);
 862
 863         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 864         obd_disconnect(sbi->ll_md_exp);
 865         sbi->ll_md_exp = NULL;
 866
 867         EXIT;
 868 }
 869
 870 void ll_kill_super(struct super_block *sb)
 871 {
 872         struct ll_sb_info *sbi;
 873         ENTRY;
 874
 875         /* not init sb ?*/
 876         if (!(sb->s_flags & SB_ACTIVE))
 877                 return;
 878
 879         sbi = ll_s2sbi(sb);
 880         /* we need restore s_dev from changed for clustred NFS before put_super
 881          * because new kernels have cached s_dev and change sb->s_dev in
 882          * put_super not affected real removing devices */
 883         if (sbi) {
 884                 sb->s_dev = sbi->ll_sdev_orig;
 885
 886                 /* wait running statahead threads to quit */
 887                 while (atomic_read(&sbi->ll_sa_running) > 0)
 888                         schedule_timeout_uninterruptible(
 889                                 cfs_time_seconds(1) >> 3);
 890         }
 891
 892         EXIT;
 893 }
 894
 895 static inline int ll_set_opt(const char *opt, char *data, int fl)
 896 {
 897         if (strncmp(opt, data, strlen(opt)) != 0)
 898                 return 0;
 899         else
 900                 return fl;
 901 }
 902
 903 /* non-client-specific mount options are parsed in lmd_parse */
 904 static int ll_options(char *options, struct ll_sb_info *sbi)
 905 {
 906         int tmp;
 907         char *s1 = options, *s2;
 908         int *flags = &sbi->ll_flags;
 909         ENTRY;
 910
 911         if (!options)
 912                 RETURN(0);
 913
 914         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 915
 916         while (*s1) {
 917                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 918                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 919                 if (tmp) {
 920                         *flags |= tmp;
 921                         goto next;
 922                 }
 923                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 924                 if (tmp) {
 925                         *flags = (*flags & ~LL_SBI_LOCALFLOCK) | tmp;
 926                         goto next;
 927                 }
 928                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 929                 if (tmp) {
 930                         *flags = (*flags & ~LL_SBI_FLOCK) | tmp;
 931                         goto next;
 932                 }
 933                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 934                 if (tmp) {
 935                         *flags &= ~tmp;
 936                         goto next;
 937                 }
 938                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 939                 if (tmp) {
 940                         *flags |= tmp;
 941                         goto next;
 942                 }
 943                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 944                 if (tmp) {
 945                         *flags &= ~tmp;
 946                         goto next;
 947                 }
 948                 tmp = ll_set_opt("context", s1, 1);
 949                 if (tmp)
 950                         goto next;
 951                 tmp = ll_set_opt("fscontext", s1, 1);
 952                 if (tmp)
 953                         goto next;
 954                 tmp = ll_set_opt("defcontext", s1, 1);
 955                 if (tmp)
 956                         goto next;
 957                 tmp = ll_set_opt("rootcontext", s1, 1);
 958                 if (tmp)
 959                         goto next;
 960                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 961                 if (tmp) {
 962                         *flags |= tmp;
 963                         goto next;
 964                 }
 965                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 966                 if (tmp) {
 967                         *flags &= ~tmp;
 968                         goto next;
 969                 }
 970
 971                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 972                 if (tmp) {
 973                         *flags |= tmp;
 974                         sbi->ll_checksum_set = 1;
 975                         goto next;
 976                 }
 977                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 978                 if (tmp) {
 979                         *flags &= ~tmp;
 980                         sbi->ll_checksum_set = 1;
 981                         goto next;
 982                 }
 983                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 984                 if (tmp) {
 985                         *flags |= tmp;
 986                         goto next;
 987                 }
 988                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 989                 if (tmp) {
 990                         *flags &= ~tmp;
 991                         goto next;
 992                 }
 993                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 994                 if (tmp) {
 995                         *flags |= tmp;
 996                         goto next;
 997                 }
 998                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 999                 if (tmp) {
1000                         *flags &= ~tmp;
1001                         goto next;
1002                 }
1003                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
1004                 if (tmp) {
1005                         *flags |= tmp;
1006                         goto next;
1007                 }
1008                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
1009                 if (tmp) {
1010                         *flags |= tmp;
1011                         goto next;
1012                 }
1013                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
1014                 if (tmp) {
1015                         *flags &= ~tmp;
1016                         goto next;
1017                 }
1018                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
1019                 if (tmp) {
1020                         *flags |= tmp;
1021                         goto next;
1022                 }
1023                 tmp = ll_set_opt("test_dummy_encryption", s1,
1024                                  LL_SBI_TEST_DUMMY_ENCRYPTION);
1025                 if (tmp) {
1026 #ifdef HAVE_LUSTRE_CRYPTO
1027                         *flags |= tmp;
1028 #else
1029                         LCONSOLE_WARN("Test dummy encryption mount option ignored: encryption not supported\n");
1030 #endif
1031                         goto next;
1032                 }
1033                 tmp = ll_set_opt("noencrypt", s1, LL_SBI_ENCRYPT);
1034                 if (tmp) {
1035 #ifdef HAVE_LUSTRE_CRYPTO
1036                         *flags &= ~tmp;
1037 #else
1038                         LCONSOLE_WARN("noencrypt mount option ignored: encryption not supported\n");
1039 #endif
1040                         goto next;
1041                 }
1042                 tmp = ll_set_opt("foreign_symlink", s1, LL_SBI_FOREIGN_SYMLINK);
1043                 if (tmp) {
1044                         int prefix_pos = sizeof("foreign_symlink=") - 1;
1045                         int equal_pos = sizeof("foreign_symlink=") - 2;
1046
1047                         /* non-default prefix provided ? */
1048                         if (strlen(s1) >= sizeof("foreign_symlink=") &&
1049                             *(s1 + equal_pos) == '=') {
1050                                 char *old = sbi->ll_foreign_symlink_prefix;
1051                                 size_t old_len =
1052                                         sbi->ll_foreign_symlink_prefix_size;
1053
1054                                 /* path must be absolute */
1055                                 if (*(s1 + sizeof("foreign_symlink=")
1056                                       - 1) != '/') {
1057                                         LCONSOLE_ERROR_MSG(0x152,
1058                                                 "foreign prefix '%s' must be an absolute path\n",
1059                                                 s1 + prefix_pos);
1060                                         RETURN(-EINVAL);
1061                                 }
1062                                 /* last option ? */
1063                                 s2 = strchrnul(s1 + prefix_pos, ',');
1064
1065                                 if (sbi->ll_foreign_symlink_prefix) {
1066                                         sbi->ll_foreign_symlink_prefix = NULL;
1067                                         sbi->ll_foreign_symlink_prefix_size = 0;
1068                                 }
1069                                 /* alloc for path length and '\0' */
1070                                 OBD_ALLOC(sbi->ll_foreign_symlink_prefix,
1071                                                 s2 - (s1 + prefix_pos) + 1);
1072                                 if (!sbi->ll_foreign_symlink_prefix) {
1073                                         /* restore previous */
1074                                         sbi->ll_foreign_symlink_prefix = old;
1075                                         sbi->ll_foreign_symlink_prefix_size =
1076                                                 old_len;
1077                                         RETURN(-ENOMEM);
1078                                 }
1079                                 if (old)
1080                                         OBD_FREE(old, old_len);
1081                                 strncpy(sbi->ll_foreign_symlink_prefix,
1082                                         s1 + prefix_pos,
1083                                         s2 - (s1 + prefix_pos));
1084                                 sbi->ll_foreign_symlink_prefix_size =
1085                                         s2 - (s1 + prefix_pos) + 1;
1086                         } else {
1087                                 LCONSOLE_ERROR_MSG(0x152,
1088                                                    "invalid %s option\n", s1);
1089                         }
1090                         /* enable foreign symlink support */
1091                         *flags |= tmp;
1092                         goto next;
1093                 }
1094                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
1095                                    s1);
1096                 RETURN(-EINVAL);
1097
1098 next:
1099                 /* Find next opt */
1100                 s2 = strchr(s1, ',');
1101                 if (s2 == NULL)
1102                         break;
1103                 s1 = s2 + 1;
1104         }
1105         RETURN(0);
1106 }
1107
1108 void ll_lli_init(struct ll_inode_info *lli)
1109 {
1110         lli->lli_inode_magic = LLI_INODE_MAGIC;
1111         lli->lli_flags = 0;
1112         spin_lock_init(&lli->lli_lock);
1113         lli->lli_posix_acl = NULL;
1114         /* Do not set lli_fid, it has been initialized already. */
1115         fid_zero(&lli->lli_pfid);
1116         lli->lli_mds_read_och = NULL;
1117         lli->lli_mds_write_och = NULL;
1118         lli->lli_mds_exec_och = NULL;
1119         lli->lli_open_fd_read_count = 0;
1120         lli->lli_open_fd_write_count = 0;
1121         lli->lli_open_fd_exec_count = 0;
1122         mutex_init(&lli->lli_och_mutex);
1123         spin_lock_init(&lli->lli_agl_lock);
1124         spin_lock_init(&lli->lli_layout_lock);
1125         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
1126         lli->lli_clob = NULL;
1127
1128         init_rwsem(&lli->lli_xattrs_list_rwsem);
1129         mutex_init(&lli->lli_xattrs_enq_lock);
1130
1131         LASSERT(lli->lli_vfs_inode.i_mode != 0);
1132         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
1133                 lli->lli_opendir_key = NULL;
1134                 lli->lli_sai = NULL;
1135                 spin_lock_init(&lli->lli_sa_lock);
1136                 lli->lli_opendir_pid = 0;
1137                 lli->lli_sa_enabled = 0;
1138                 init_rwsem(&lli->lli_lsm_sem);
1139         } else {
1140                 mutex_init(&lli->lli_size_mutex);
1141                 mutex_init(&lli->lli_setattr_mutex);
1142                 lli->lli_symlink_name = NULL;
1143                 ll_trunc_sem_init(&lli->lli_trunc_sem);
1144                 range_lock_tree_init(&lli->lli_write_tree);
1145                 init_rwsem(&lli->lli_glimpse_sem);
1146                 lli->lli_glimpse_time = ktime_set(0, 0);
1147                 INIT_LIST_HEAD(&lli->lli_agl_list);
1148                 lli->lli_agl_index = 0;
1149                 lli->lli_async_rc = 0;
1150                 spin_lock_init(&lli->lli_heat_lock);
1151                 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
1152                 lli->lli_heat_flags = 0;
1153                 mutex_init(&lli->lli_pcc_lock);
1154                 lli->lli_pcc_state = PCC_STATE_FL_NONE;
1155                 lli->lli_pcc_inode = NULL;
1156                 lli->lli_pcc_dsflags = PCC_DATASET_INVALID;
1157                 lli->lli_pcc_generation = 0;
1158                 mutex_init(&lli->lli_group_mutex);
1159                 lli->lli_group_users = 0;
1160                 lli->lli_group_gid = 0;
1161         }
1162         mutex_init(&lli->lli_layout_mutex);
1163         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
1164 }
1165
1166 #define MAX_STRING_SIZE 128
1167
1168 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1169
1170 #define LSI_BDI_INITIALIZED     0x00400000
1171
1172 #ifndef HAVE_BDI_CAP_MAP_COPY
1173 # define BDI_CAP_MAP_COPY       0
1174 #endif
1175
1176 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1177 {
1178         struct  lustre_sb_info *lsi = s2lsi(sb);
1179         char buf[MAX_STRING_SIZE];
1180         va_list args;
1181         int err;
1182
1183         err = bdi_init(&lsi->lsi_bdi);
1184         if (err)
1185                 return err;
1186
1187         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1188         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1189         lsi->lsi_bdi.name = "lustre";
1190         va_start(args, fmt);
1191         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1192         va_end(args);
1193         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1194         va_end(args);
1195         if (!err)
1196                 sb->s_bdi = &lsi->lsi_bdi;
1197
1198         return err;
1199 }
1200 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1201
1202 int ll_fill_super(struct super_block *sb)
1203 {
1204         struct  lustre_profile *lprof = NULL;
1205         struct  lustre_sb_info *lsi = s2lsi(sb);
1206         struct  ll_sb_info *sbi = NULL;
1207         char    *dt = NULL, *md = NULL;
1208         char    *profilenm = get_profile_name(sb);
1209         struct config_llog_instance *cfg;
1210         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1211         const int instlen = LUSTRE_MAXINSTANCE + 2;
1212         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1213         char name[MAX_STRING_SIZE];
1214         int md_len = 0;
1215         int dt_len = 0;
1216         uuid_t uuid;
1217         char *ptr;
1218         int len;
1219         int err;
1220
1221         ENTRY;
1222         /* for ASLR, to map between cfg_instance and hashed ptr */
1223         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1224                profilenm, cfg_instance, sb);
1225
1226         OBD_RACE(OBD_FAIL_LLITE_RACE_MOUNT);
1227
1228         OBD_ALLOC_PTR(cfg);
1229         if (cfg == NULL)
1230                 GOTO(out_free_cfg, err = -ENOMEM);
1231
1232         /* client additional sb info */
1233         lsi->lsi_llsbi = sbi = ll_init_sbi();
1234         if (IS_ERR(sbi))
1235                 GOTO(out_free_cfg, err = PTR_ERR(sbi));
1236
1237         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1238         if (err)
1239                 GOTO(out_free_cfg, err);
1240
1241         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1242         sb->s_d_op = &ll_d_ops;
1243
1244         /* UUID handling */
1245         generate_random_uuid(uuid.b);
1246         snprintf(sbi->ll_sb_uuid.uuid, sizeof(sbi->ll_sb_uuid), "%pU", uuid.b);
1247
1248         CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1249
1250         /* Get fsname */
1251         len = strlen(profilenm);
1252         ptr = strrchr(profilenm, '-');
1253         if (ptr && (strcmp(ptr, "-client") == 0))
1254                 len -= 7;
1255
1256         if (len > LUSTRE_MAXFSNAME) {
1257                 if (unlikely(len >= MAX_STRING_SIZE))
1258                         len = MAX_STRING_SIZE - 1;
1259                 strncpy(name, profilenm, len);
1260                 name[len] = '\0';
1261                 err = -ENAMETOOLONG;
1262                 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1263                        name, LUSTRE_MAXFSNAME, err);
1264                 GOTO(out_free_cfg, err);
1265         }
1266         strncpy(sbi->ll_fsname, profilenm, len);
1267         sbi->ll_fsname[len] = '\0';
1268
1269         /* Mount info */
1270         snprintf(name, sizeof(name), "%.*s-%016lx", len,
1271                  profilenm, cfg_instance);
1272
1273         err = super_setup_bdi_name(sb, "%s", name);
1274         if (err)
1275                 GOTO(out_free_cfg, err);
1276
1277         /* Call ll_debugfs_register_super() before lustre_process_log()
1278          * so that "llite.*.*" params can be processed correctly.
1279          */
1280         err = ll_debugfs_register_super(sb, name);
1281         if (err < 0) {
1282                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1283                        sbi->ll_fsname, err);
1284                 err = 0;
1285         }
1286
1287         /* The cfg_instance is a value unique to this super, in case some
1288          * joker tries to mount the same fs at two mount points.
1289          */
1290         cfg->cfg_instance = cfg_instance;
1291         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1292         cfg->cfg_callback = class_config_llog_handler;
1293         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1294         /* set up client obds */
1295         err = lustre_process_log(sb, profilenm, cfg);
1296         if (err < 0)
1297                 GOTO(out_debugfs, err);
1298
1299         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1300         lprof = class_get_profile(profilenm);
1301         if (lprof == NULL) {
1302                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1303                                    " read from the MGS.  Does that filesystem "
1304                                    "exist?\n", profilenm);
1305                 GOTO(out_debugfs, err = -EINVAL);
1306         }
1307         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1308                lprof->lp_md, lprof->lp_dt);
1309
1310         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1311         OBD_ALLOC(dt, dt_len);
1312         if (!dt)
1313                 GOTO(out_profile, err = -ENOMEM);
1314         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1315
1316         md_len = strlen(lprof->lp_md) + instlen + 2;
1317         OBD_ALLOC(md, md_len);
1318         if (!md)
1319                 GOTO(out_free_dt, err = -ENOMEM);
1320         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1321
1322         /* connections, registrations, sb setup */
1323         err = client_common_fill_super(sb, md, dt);
1324         if (err < 0)
1325                 GOTO(out_free_md, err);
1326
1327         sbi->ll_client_common_fill_super_succeeded = 1;
1328
1329 out_free_md:
1330         if (md)
1331                 OBD_FREE(md, md_len);
1332 out_free_dt:
1333         if (dt)
1334                 OBD_FREE(dt, dt_len);
1335 out_profile:
1336         if (lprof)
1337                 class_put_profile(lprof);
1338 out_debugfs:
1339         if (err < 0)
1340                 ll_debugfs_unregister_super(sb);
1341 out_free_cfg:
1342         if (cfg)
1343                 OBD_FREE_PTR(cfg);
1344
1345         if (err)
1346                 ll_put_super(sb);
1347         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1348                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1349         RETURN(err);
1350 } /* ll_fill_super */
1351
1352 void ll_put_super(struct super_block *sb)
1353 {
1354         struct config_llog_instance cfg, params_cfg;
1355         struct obd_device *obd;
1356         struct lustre_sb_info *lsi = s2lsi(sb);
1357         struct ll_sb_info *sbi = ll_s2sbi(sb);
1358         char *profilenm = get_profile_name(sb);
1359         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1360         long ccc_count;
1361         int next, force = 1, rc = 0;
1362         ENTRY;
1363
1364         if (IS_ERR(sbi))
1365                 GOTO(out_no_sbi, 0);
1366
1367         /* Should replace instance_id with something better for ASLR */
1368         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1369                profilenm, cfg_instance, sb);
1370
1371         cfg.cfg_instance = cfg_instance;
1372         lustre_end_log(sb, profilenm, &cfg);
1373
1374         params_cfg.cfg_instance = cfg_instance;
1375         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1376
1377         if (sbi->ll_md_exp) {
1378                 obd = class_exp2obd(sbi->ll_md_exp);
1379                 if (obd)
1380                         force = obd->obd_force;
1381         }
1382
1383         /* Wait for unstable pages to be committed to stable storage */
1384         if (force == 0) {
1385                 rc = l_wait_event_abortable(
1386                         sbi->ll_cache->ccc_unstable_waitq,
1387                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0);
1388         }
1389
1390         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1391         if (force == 0 && rc != -ERESTARTSYS)
1392                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1393
1394         /* We need to set force before the lov_disconnect in
1395          * lustre_common_put_super, since l_d cleans up osc's as well.
1396          */
1397         if (force) {
1398                 next = 0;
1399                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1400                                                      &next)) != NULL) {
1401                         obd->obd_force = force;
1402                 }
1403         }
1404
1405         if (sbi->ll_client_common_fill_super_succeeded) {
1406                 /* Only if client_common_fill_super succeeded */
1407                 client_common_put_super(sb);
1408         }
1409
1410         next = 0;
1411         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1412                 class_manual_cleanup(obd);
1413
1414         if (sbi->ll_flags & LL_SBI_VERBOSE)
1415                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1416
1417         if (profilenm)
1418                 class_del_profile(profilenm);
1419
1420 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1421         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1422                 bdi_destroy(&lsi->lsi_bdi);
1423                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1424         }
1425 #endif
1426
1427         ll_free_sbi(sb);
1428         lsi->lsi_llsbi = NULL;
1429 out_no_sbi:
1430         lustre_common_put_super(sb);
1431
1432         cl_env_cache_purge(~0);
1433
1434         EXIT;
1435 } /* client_put_super */
1436
1437 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1438 {
1439         struct inode *inode = NULL;
1440
1441         /* NOTE: we depend on atomic igrab() -bzzz */
1442         lock_res_and_lock(lock);
1443         if (lock->l_resource->lr_lvb_inode) {
1444                 struct ll_inode_info * lli;
1445                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1446                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1447                         inode = igrab(lock->l_resource->lr_lvb_inode);
1448                 } else {
1449                         inode = lock->l_resource->lr_lvb_inode;
1450                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1451                                          D_WARNING, lock, "lr_lvb_inode %p is "
1452                                          "bogus: magic %08x",
1453                                          lock->l_resource->lr_lvb_inode,
1454                                          lli->lli_inode_magic);
1455                         inode = NULL;
1456                 }
1457         }
1458         unlock_res_and_lock(lock);
1459         return inode;
1460 }
1461
1462 void ll_dir_clear_lsm_md(struct inode *inode)
1463 {
1464         struct ll_inode_info *lli = ll_i2info(inode);
1465
1466         LASSERT(S_ISDIR(inode->i_mode));
1467
1468         if (lli->lli_lsm_md) {
1469                 lmv_free_memmd(lli->lli_lsm_md);
1470                 lli->lli_lsm_md = NULL;
1471         }
1472
1473         if (lli->lli_default_lsm_md) {
1474                 lmv_free_memmd(lli->lli_default_lsm_md);
1475                 lli->lli_default_lsm_md = NULL;
1476         }
1477 }
1478
1479 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1480                                       const struct lu_fid *fid,
1481                                       struct lustre_md *md)
1482 {
1483         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1484         struct mdt_body         *body = md->body;
1485         struct inode            *inode;
1486         ino_t                   ino;
1487         ENTRY;
1488
1489         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1490         inode = iget_locked(sb, ino);
1491         if (inode == NULL) {
1492                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1493                        sbi->ll_fsname, PFID(fid));
1494                 RETURN(ERR_PTR(-ENOENT));
1495         }
1496
1497         if (inode->i_state & I_NEW) {
1498                 struct ll_inode_info *lli = ll_i2info(inode);
1499                 struct lmv_stripe_md *lsm = md->lmv;
1500
1501                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1502                                 (body->mbo_mode & S_IFMT);
1503                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1504                          PFID(fid));
1505
1506                 inode->i_mtime.tv_sec = 0;
1507                 inode->i_atime.tv_sec = 0;
1508                 inode->i_ctime.tv_sec = 0;
1509                 inode->i_rdev = 0;
1510
1511 #ifdef HAVE_BACKING_DEV_INFO
1512                 /* initializing backing dev info. */
1513                 inode->i_mapping->backing_dev_info =
1514                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1515 #endif
1516                 inode->i_op = &ll_dir_inode_operations;
1517                 inode->i_fop = &ll_dir_operations;
1518                 lli->lli_fid = *fid;
1519                 ll_lli_init(lli);
1520
1521                 LASSERT(lsm != NULL);
1522                 /* master object FID */
1523                 lli->lli_pfid = body->mbo_fid1;
1524                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1525                        lli, PFID(fid), PFID(&lli->lli_pfid));
1526                 unlock_new_inode(inode);
1527         }
1528
1529         RETURN(inode);
1530 }
1531
1532 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1533 {
1534         struct lu_fid *fid;
1535         struct lmv_stripe_md *lsm = md->lmv;
1536         struct ll_inode_info *lli = ll_i2info(inode);
1537         int i;
1538
1539         LASSERT(lsm != NULL);
1540
1541         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1542                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1543         lsm_md_dump(D_INODE, lsm);
1544
1545         if (!lmv_dir_striped(lsm))
1546                 goto out;
1547
1548         /* XXX sigh, this lsm_root initialization should be in
1549          * LMV layer, but it needs ll_iget right now, so we
1550          * put this here right now. */
1551         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1552                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1553                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1554
1555                 if (!fid_is_sane(fid))
1556                         continue;
1557
1558                 /* Unfortunately ll_iget will call ll_update_inode,
1559                  * where the initialization of slave inode is slightly
1560                  * different, so it reset lsm_md to NULL to avoid
1561                  * initializing lsm for slave inode. */
1562                 lsm->lsm_md_oinfo[i].lmo_root =
1563                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1564                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1565                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1566
1567                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1568                         while (i-- > 0) {
1569                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1570                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1571                         }
1572                         return rc;
1573                 }
1574         }
1575 out:
1576         lli->lli_lsm_md = lsm;
1577
1578         return 0;
1579 }
1580
1581 static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
1582 {
1583         struct ll_inode_info *lli = ll_i2info(inode);
1584
1585         if (!md->default_lmv) {
1586                 /* clear default lsm */
1587                 if (lli->lli_default_lsm_md) {
1588                         down_write(&lli->lli_lsm_sem);
1589                         if (lli->lli_default_lsm_md) {
1590                                 lmv_free_memmd(lli->lli_default_lsm_md);
1591                                 lli->lli_default_lsm_md = NULL;
1592                         }
1593                         up_write(&lli->lli_lsm_sem);
1594                 }
1595                 return;
1596         }
1597
1598         if (lli->lli_default_lsm_md) {
1599                 /* do nonthing if default lsm isn't changed */
1600                 down_read(&lli->lli_lsm_sem);
1601                 if (lli->lli_default_lsm_md &&
1602                     lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
1603                         up_read(&lli->lli_lsm_sem);
1604                         return;
1605                 }
1606                 up_read(&lli->lli_lsm_sem);
1607         }
1608
1609         down_write(&lli->lli_lsm_sem);
1610         if (lli->lli_default_lsm_md)
1611                 lmv_free_memmd(lli->lli_default_lsm_md);
1612         lli->lli_default_lsm_md = md->default_lmv;
1613         lsm_md_dump(D_INODE, md->default_lmv);
1614         md->default_lmv = NULL;
1615         up_write(&lli->lli_lsm_sem);
1616 }
1617
1618 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1619 {
1620         struct ll_inode_info *lli = ll_i2info(inode);
1621         struct lmv_stripe_md *lsm = md->lmv;
1622         struct cl_attr  *attr;
1623         int rc = 0;
1624
1625         ENTRY;
1626
1627         LASSERT(S_ISDIR(inode->i_mode));
1628         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1629                PFID(ll_inode2fid(inode)));
1630
1631         /* update default LMV */
1632         if (md->default_lmv)
1633                 ll_update_default_lsm_md(inode, md);
1634
1635         /*
1636          * no striped information from request, lustre_md from req does not
1637          * include stripeEA, see ll_md_setattr()
1638          */
1639         if (!lsm)
1640                 RETURN(0);
1641
1642         /*
1643          * normally dir layout doesn't change, only take read lock to check
1644          * that to avoid blocking other MD operations.
1645          */
1646         down_read(&lli->lli_lsm_sem);
1647
1648         /* some current lookup initialized lsm, and unchanged */
1649         if (lli->lli_lsm_md && lsm_md_eq(lli->lli_lsm_md, lsm))
1650                 GOTO(unlock, rc = 0);
1651
1652         /* if dir layout doesn't match, check whether version is increased,
1653          * which means layout is changed, this happens in dir split/merge and
1654          * lfsck.
1655          *
1656          * foreign LMV should not change.
1657          */
1658         if (lli->lli_lsm_md && lmv_dir_striped(lli->lli_lsm_md) &&
1659             lsm->lsm_md_layout_version <=
1660             lli->lli_lsm_md->lsm_md_layout_version) {
1661                 CERROR("%s: "DFID" dir layout mismatch:\n",
1662                        ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1663                 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1664                 lsm_md_dump(D_ERROR, lsm);
1665                 GOTO(unlock, rc = -EINVAL);
1666         }
1667
1668         up_read(&lli->lli_lsm_sem);
1669         down_write(&lli->lli_lsm_sem);
1670         /* clear existing lsm */
1671         if (lli->lli_lsm_md) {
1672                 lmv_free_memmd(lli->lli_lsm_md);
1673                 lli->lli_lsm_md = NULL;
1674         }
1675
1676         rc = ll_init_lsm_md(inode, md);
1677         up_write(&lli->lli_lsm_sem);
1678
1679         if (rc)
1680                 RETURN(rc);
1681
1682         /* set md->lmv to NULL, so the following free lustre_md will not free
1683          * this lsm.
1684          */
1685         md->lmv = NULL;
1686
1687         /* md_merge_attr() may take long, since lsm is already set, switch to
1688          * read lock.
1689          */
1690         down_read(&lli->lli_lsm_sem);
1691
1692         if (!lmv_dir_striped(lli->lli_lsm_md))
1693                 GOTO(unlock, rc = 0);
1694
1695         OBD_ALLOC_PTR(attr);
1696         if (!attr)
1697                 GOTO(unlock, rc = -ENOMEM);
1698
1699         /* validate the lsm */
1700         rc = md_merge_attr(ll_i2mdexp(inode), lli->lli_lsm_md, attr,
1701                            ll_md_blocking_ast);
1702         if (!rc) {
1703                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1704                         md->body->mbo_nlink = attr->cat_nlink;
1705                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1706                         md->body->mbo_size = attr->cat_size;
1707                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1708                         md->body->mbo_atime = attr->cat_atime;
1709                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1710                         md->body->mbo_ctime = attr->cat_ctime;
1711                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1712                         md->body->mbo_mtime = attr->cat_mtime;
1713         }
1714
1715         OBD_FREE_PTR(attr);
1716         GOTO(unlock, rc);
1717 unlock:
1718         up_read(&lli->lli_lsm_sem);
1719
1720         return rc;
1721 }
1722
1723 void ll_clear_inode(struct inode *inode)
1724 {
1725         struct ll_inode_info *lli = ll_i2info(inode);
1726         struct ll_sb_info *sbi = ll_i2sbi(inode);
1727
1728         ENTRY;
1729
1730         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1731                PFID(ll_inode2fid(inode)), inode);
1732
1733         if (S_ISDIR(inode->i_mode)) {
1734                 /* these should have been cleared in ll_file_release */
1735                 LASSERT(lli->lli_opendir_key == NULL);
1736                 LASSERT(lli->lli_sai == NULL);
1737                 LASSERT(lli->lli_opendir_pid == 0);
1738         } else {
1739                 pcc_inode_free(inode);
1740         }
1741
1742         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1743
1744         LASSERT(!lli->lli_open_fd_write_count);
1745         LASSERT(!lli->lli_open_fd_read_count);
1746         LASSERT(!lli->lli_open_fd_exec_count);
1747
1748         if (lli->lli_mds_write_och)
1749                 ll_md_real_close(inode, FMODE_WRITE);
1750         if (lli->lli_mds_exec_och)
1751                 ll_md_real_close(inode, FMODE_EXEC);
1752         if (lli->lli_mds_read_och)
1753                 ll_md_real_close(inode, FMODE_READ);
1754
1755         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1756                 OBD_FREE(lli->lli_symlink_name,
1757                          strlen(lli->lli_symlink_name) + 1);
1758                 lli->lli_symlink_name = NULL;
1759         }
1760
1761         ll_xattr_cache_destroy(inode);
1762
1763         forget_all_cached_acls(inode);
1764         lli_clear_acl(lli);
1765         lli->lli_inode_magic = LLI_INODE_DEAD;
1766
1767         if (S_ISDIR(inode->i_mode))
1768                 ll_dir_clear_lsm_md(inode);
1769         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1770                 LASSERT(list_empty(&lli->lli_agl_list));
1771
1772         /*
1773          * XXX This has to be done before lsm is freed below, because
1774          * cl_object still uses inode lsm.
1775          */
1776         cl_inode_fini(inode);
1777
1778         llcrypt_put_encryption_info(inode);
1779
1780         EXIT;
1781 }
1782
1783 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1784 {
1785         struct lustre_md md;
1786         struct inode *inode = dentry->d_inode;
1787         struct ll_sb_info *sbi = ll_i2sbi(inode);
1788         struct ptlrpc_request *request = NULL;
1789         int rc, ia_valid;
1790         ENTRY;
1791
1792         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1793                                      LUSTRE_OPC_ANY, NULL);
1794         if (IS_ERR(op_data))
1795                 RETURN(PTR_ERR(op_data));
1796
1797         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1798         if (rc) {
1799                 ptlrpc_req_finished(request);
1800                 if (rc == -ENOENT) {
1801                         clear_nlink(inode);
1802                         /* Unlinked special device node? Or just a race?
1803                          * Pretend we done everything. */
1804                         if (!S_ISREG(inode->i_mode) &&
1805                             !S_ISDIR(inode->i_mode)) {
1806                                 ia_valid = op_data->op_attr.ia_valid;
1807                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1808                                 rc = simple_setattr(dentry, &op_data->op_attr);
1809                                 op_data->op_attr.ia_valid = ia_valid;
1810                         }
1811                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1812                         CERROR("md_setattr fails: rc = %d\n", rc);
1813                 }
1814                 RETURN(rc);
1815         }
1816
1817         rc = md_get_lustre_md(sbi->ll_md_exp, &request->rq_pill, sbi->ll_dt_exp,
1818                               sbi->ll_md_exp, &md);
1819         if (rc) {
1820                 ptlrpc_req_finished(request);
1821                 RETURN(rc);
1822         }
1823
1824         ia_valid = op_data->op_attr.ia_valid;
1825         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1826          * cache is not cleared yet. */
1827         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1828         if (S_ISREG(inode->i_mode))
1829                 inode_lock(inode);
1830         rc = simple_setattr(dentry, &op_data->op_attr);
1831         if (S_ISREG(inode->i_mode))
1832                 inode_unlock(inode);
1833         op_data->op_attr.ia_valid = ia_valid;
1834
1835         rc = ll_update_inode(inode, &md);
1836         ptlrpc_req_finished(request);
1837
1838         RETURN(rc);
1839 }
1840
1841 /**
1842  * Zero portion of page that is part of @inode.
1843  * This implies, if necessary:
1844  * - taking cl_lock on range corresponding to concerned page
1845  * - grabbing vm page
1846  * - associating cl_page
1847  * - proceeding to clio read
1848  * - zeroing range in page
1849  * - proceeding to cl_page flush
1850  * - releasing cl_lock
1851  *
1852  * \param[in] inode     inode
1853  * \param[in] index     page index
1854  * \param[in] offset    offset in page to start zero from
1855  * \param[in] len       len to zero
1856  *
1857  * \retval 0            on success
1858  * \retval negative     errno on failure
1859  */
1860 int ll_io_zero_page(struct inode *inode, pgoff_t index, pgoff_t offset,
1861                     unsigned len)
1862 {
1863         struct ll_inode_info *lli = ll_i2info(inode);
1864         struct cl_object *clob = lli->lli_clob;
1865         __u16 refcheck;
1866         struct lu_env *env = NULL;
1867         struct cl_io *io = NULL;
1868         struct cl_page *clpage = NULL;
1869         struct page *vmpage = NULL;
1870         unsigned from = index << PAGE_SHIFT;
1871         struct cl_lock *lock = NULL;
1872         struct cl_lock_descr *descr = NULL;
1873         struct cl_2queue *queue = NULL;
1874         struct cl_sync_io *anchor = NULL;
1875         bool holdinglock = false;
1876         bool lockedbymyself = true;
1877         int rc;
1878
1879         ENTRY;
1880
1881         env = cl_env_get(&refcheck);
1882         if (IS_ERR(env))
1883                 RETURN(PTR_ERR(env));
1884
1885         io = vvp_env_thread_io(env);
1886         io->ci_obj = clob;
1887         rc = cl_io_rw_init(env, io, CIT_WRITE, from, PAGE_SIZE);
1888         if (rc)
1889                 GOTO(putenv, rc);
1890
1891         lock = vvp_env_lock(env);
1892         descr = &lock->cll_descr;
1893         descr->cld_obj   = io->ci_obj;
1894         descr->cld_start = cl_index(io->ci_obj, from);
1895         descr->cld_end   = cl_index(io->ci_obj, from + PAGE_SIZE - 1);
1896         descr->cld_mode  = CLM_WRITE;
1897         descr->cld_enq_flags = CEF_MUST | CEF_NONBLOCK;
1898
1899         /* request lock for page */
1900         rc = cl_lock_request(env, io, lock);
1901         /* -ECANCELED indicates a matching lock with a different extent
1902          * was already present, and -EEXIST indicates a matching lock
1903          * on exactly the same extent was already present.
1904          * In both cases it means we are covered.
1905          */
1906         if (rc == -ECANCELED || rc == -EEXIST)
1907                 rc = 0;
1908         else if (rc < 0)
1909                 GOTO(iofini, rc);
1910         else
1911                 holdinglock = true;
1912
1913         /* grab page */
1914         vmpage = grab_cache_page_nowait(inode->i_mapping, index);
1915         if (vmpage == NULL)
1916                 GOTO(rellock, rc = -EOPNOTSUPP);
1917
1918         if (!PageDirty(vmpage)) {
1919                 /* associate cl_page */
1920                 clpage = cl_page_find(env, clob, vmpage->index,
1921                                       vmpage, CPT_CACHEABLE);
1922                 if (IS_ERR(clpage))
1923                         GOTO(pagefini, rc = PTR_ERR(clpage));
1924
1925                 cl_page_assume(env, io, clpage);
1926         }
1927
1928         if (!PageUptodate(vmpage) && !PageDirty(vmpage) &&
1929             !PageWriteback(vmpage)) {
1930                 /* read page */
1931                 /* set PagePrivate2 to detect special case of empty page
1932                  * in osc_brw_fini_request()
1933                  */
1934                 SetPagePrivate2(vmpage);
1935                 rc = ll_io_read_page(env, io, clpage, NULL);
1936                 if (!PagePrivate2(vmpage))
1937                         /* PagePrivate2 was cleared in osc_brw_fini_request()
1938                          * meaning we read an empty page. In this case, in order
1939                          * to avoid allocating unnecessary block in truncated
1940                          * file, we must not zero and write as below. Subsequent
1941                          * server-side truncate will handle things correctly.
1942                          */
1943                         GOTO(clpfini, rc = 0);
1944                 ClearPagePrivate2(vmpage);
1945                 if (rc)
1946                         GOTO(clpfini, rc);
1947                 lockedbymyself = trylock_page(vmpage);
1948                 cl_page_assume(env, io, clpage);
1949         }
1950
1951         /* zero range in page */
1952         zero_user(vmpage, offset, len);
1953
1954         if (holdinglock && clpage) {
1955                 /* explicitly write newly modified page */
1956                 queue = &io->ci_queue;
1957                 cl_2queue_init(queue);
1958                 anchor = &vvp_env_info(env)->vti_anchor;
1959                 cl_sync_io_init(anchor, 1);
1960                 clpage->cp_sync_io = anchor;
1961                 cl_2queue_add(queue, clpage);
1962                 rc = cl_io_submit_rw(env, io, CRT_WRITE, queue);
1963                 if (rc)
1964                         GOTO(queuefini1, rc);
1965                 rc = cl_sync_io_wait(env, anchor, 0);
1966                 if (rc)
1967                         GOTO(queuefini2, rc);
1968                 cl_page_assume(env, io, clpage);
1969
1970 queuefini2:
1971                 cl_2queue_discard(env, io, queue);
1972 queuefini1:
1973                 cl_2queue_disown(env, io, queue);
1974                 cl_2queue_fini(env, queue);
1975         }
1976
1977 clpfini:
1978         if (clpage)
1979                 cl_page_put(env, clpage);
1980 pagefini:
1981         if (lockedbymyself) {
1982                 unlock_page(vmpage);
1983                 put_page(vmpage);
1984         }
1985 rellock:
1986         if (holdinglock)
1987                 cl_lock_release(env, lock);
1988 iofini:
1989         cl_io_fini(env, io);
1990 putenv:
1991         if (env)
1992                 cl_env_put(env, &refcheck);
1993
1994         RETURN(rc);
1995 }
1996
1997 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1998  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1999  * keep these values until such a time that objects are allocated for it.
2000  * We do the MDS operations first, as it is checking permissions for us.
2001  * We don't to the MDS RPC if there is nothing that we want to store there,
2002  * otherwise there is no harm in updating mtime/atime on the MDS if we are
2003  * going to do an RPC anyways.
2004  *
2005  * If we are doing a truncate, we will send the mtime and ctime updates
2006  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
2007  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
2008  * at the same time.
2009  *
2010  * In case of HSMimport, we only set attr on MDS.
2011  */
2012 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
2013                    enum op_xvalid xvalid, bool hsm_import)
2014 {
2015         struct inode *inode = dentry->d_inode;
2016         struct ll_inode_info *lli = ll_i2info(inode);
2017         struct md_op_data *op_data = NULL;
2018         ktime_t kstart = ktime_get();
2019         int rc = 0;
2020
2021         ENTRY;
2022
2023         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
2024                "valid %x, hsm_import %d\n",
2025                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
2026                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
2027                hsm_import);
2028
2029         if (attr->ia_valid & ATTR_SIZE) {
2030                 /* Check new size against VFS/VM file size limit and rlimit */
2031                 rc = inode_newsize_ok(inode, attr->ia_size);
2032                 if (rc)
2033                         RETURN(rc);
2034
2035                 /* The maximum Lustre file size is variable, based on the
2036                  * OST maximum object size and number of stripes.  This
2037                  * needs another check in addition to the VFS check above. */
2038                 if (attr->ia_size > ll_file_maxbytes(inode)) {
2039                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
2040                                PFID(&lli->lli_fid), attr->ia_size,
2041                                ll_file_maxbytes(inode));
2042                         RETURN(-EFBIG);
2043                 }
2044
2045                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
2046         }
2047
2048         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
2049         if (attr->ia_valid & TIMES_SET_FLAGS) {
2050                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
2051                     !capable(CAP_FOWNER))
2052                         RETURN(-EPERM);
2053         }
2054
2055         /* We mark all of the fields "set" so MDS/OST does not re-set them */
2056         if (!(xvalid & OP_XVALID_CTIME_SET) &&
2057              (attr->ia_valid & ATTR_CTIME)) {
2058                 attr->ia_ctime = current_time(inode);
2059                 xvalid |= OP_XVALID_CTIME_SET;
2060         }
2061         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
2062             (attr->ia_valid & ATTR_ATIME)) {
2063                 attr->ia_atime = current_time(inode);
2064                 attr->ia_valid |= ATTR_ATIME_SET;
2065         }
2066         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
2067             (attr->ia_valid & ATTR_MTIME)) {
2068                 attr->ia_mtime = current_time(inode);
2069                 attr->ia_valid |= ATTR_MTIME_SET;
2070         }
2071
2072         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
2073                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
2074                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
2075                        ktime_get_real_seconds());
2076
2077         if (S_ISREG(inode->i_mode))
2078                 inode_unlock(inode);
2079
2080         /* We always do an MDS RPC, even if we're only changing the size;
2081          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
2082
2083         OBD_ALLOC_PTR(op_data);
2084         if (op_data == NULL)
2085                 GOTO(out, rc = -ENOMEM);
2086
2087         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
2088                 /* If we are changing file size, file content is
2089                  * modified, flag it.
2090                  */
2091                 xvalid |= OP_XVALID_OWNEROVERRIDE;
2092                 op_data->op_bias |= MDS_DATA_MODIFIED;
2093                 clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags);
2094         }
2095
2096         if (attr->ia_valid & ATTR_FILE) {
2097                 struct ll_file_data *fd = attr->ia_file->private_data;
2098
2099                 if (fd->fd_lease_och)
2100                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
2101         }
2102
2103         op_data->op_attr = *attr;
2104         op_data->op_xvalid = xvalid;
2105
2106         rc = ll_md_setattr(dentry, op_data);
2107         if (rc)
2108                 GOTO(out, rc);
2109
2110         if (!S_ISREG(inode->i_mode) || hsm_import)
2111                 GOTO(out, rc = 0);
2112
2113         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
2114                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
2115             xvalid & OP_XVALID_CTIME_SET) {
2116                 bool cached = false;
2117
2118                 rc = pcc_inode_setattr(inode, attr, &cached);
2119                 if (cached) {
2120                         if (rc) {
2121                                 CERROR("%s: PCC inode "DFID" setattr failed: "
2122                                        "rc = %d\n",
2123                                        ll_i2sbi(inode)->ll_fsname,
2124                                        PFID(&lli->lli_fid), rc);
2125                                 GOTO(out, rc);
2126                         }
2127                 } else {
2128                         unsigned int flags = 0;
2129
2130                         /* For truncate and utimes sending attributes to OSTs,
2131                          * setting mtime/atime to the past will be performed
2132                          * under PW [0:EOF] extent lock (new_size:EOF for
2133                          * truncate). It may seem excessive to send mtime/atime
2134                          * updates to OSTs when not setting times to past, but
2135                          * it is necessary due to possible time
2136                          * de-synchronization between MDT inode and OST objects
2137                          */
2138                         if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode) &&
2139                             attr->ia_valid & ATTR_SIZE) {
2140                                 xvalid |= OP_XVALID_FLAGS;
2141                                 flags = LUSTRE_ENCRYPT_FL;
2142                                 /* Call to ll_io_zero_page is not necessary if
2143                                  * truncating on PAGE_SIZE boundary, because
2144                                  * whole pages will be wiped.
2145                                  * In case of Direct IO, all we need is to set
2146                                  * new size.
2147                                  */
2148                                 if (attr->ia_size & ~PAGE_MASK &&
2149                                     !(attr->ia_valid & ATTR_FILE &&
2150                                       attr->ia_file->f_flags & O_DIRECT)) {
2151                                         pgoff_t offset =
2152                                                 attr->ia_size & (PAGE_SIZE - 1);
2153
2154                                         rc = ll_io_zero_page(inode,
2155                                                     attr->ia_size >> PAGE_SHIFT,
2156                                                     offset, PAGE_SIZE - offset);
2157                                         if (rc)
2158                                                 GOTO(out, rc);
2159                                 }
2160                         }
2161                         rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, flags);
2162                 }
2163         }
2164
2165         /* If the file was restored, it needs to set dirty flag.
2166          *
2167          * We've already sent MDS_DATA_MODIFIED flag in
2168          * ll_md_setattr() for truncate. However, the MDT refuses to
2169          * set the HS_DIRTY flag on released files, so we have to set
2170          * it again if the file has been restored. Please check how
2171          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
2172          *
2173          * Please notice that if the file is not released, the previous
2174          * MDS_DATA_MODIFIED has taken effect and usually
2175          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
2176          * This way we can save an RPC for common open + trunc
2177          * operation. */
2178         if (test_and_clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags)) {
2179                 struct hsm_state_set hss = {
2180                         .hss_valid = HSS_SETMASK,
2181                         .hss_setmask = HS_DIRTY,
2182                 };
2183                 int rc2;
2184
2185                 rc2 = ll_hsm_state_set(inode, &hss);
2186                 /* truncate and write can happen at the same time, so that
2187                  * the file can be set modified even though the file is not
2188                  * restored from released state, and ll_hsm_state_set() is
2189                  * not applicable for the file, and rc2 < 0 is normal in this
2190                  * case. */
2191                 if (rc2 < 0)
2192                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
2193                                PFID(ll_inode2fid(inode)), rc2);
2194         }
2195
2196         EXIT;
2197 out:
2198         if (op_data != NULL)
2199                 ll_finish_md_op_data(op_data);
2200
2201         if (S_ISREG(inode->i_mode)) {
2202                 inode_lock(inode);
2203                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
2204                         inode_dio_wait(inode);
2205                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
2206                  * flag.  ll_update_inode (called from ll_md_setattr), clears
2207                  * inode flags, so there is a gap where S_NOSEC is not set.
2208                  * This can cause a writer to take the i_mutex unnecessarily,
2209                  * but this is safe to do and should be rare. */
2210                 inode_has_no_xattr(inode);
2211         }
2212
2213         if (!rc)
2214                 ll_stats_ops_tally(ll_i2sbi(inode), attr->ia_valid & ATTR_SIZE ?
2215                                         LPROC_LL_TRUNC : LPROC_LL_SETATTR,
2216                                    ktime_us_delta(ktime_get(), kstart));
2217
2218         return rc;
2219 }
2220
2221 int ll_setattr(struct dentry *de, struct iattr *attr)
2222 {
2223         int mode = de->d_inode->i_mode;
2224         enum op_xvalid xvalid = 0;
2225         int rc;
2226
2227         rc = llcrypt_prepare_setattr(de, attr);
2228         if (rc)
2229                 return rc;
2230
2231         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
2232                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
2233                 xvalid |= OP_XVALID_OWNEROVERRIDE;
2234
2235         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
2236                                (ATTR_SIZE|ATTR_MODE)) &&
2237             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
2238              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
2239               !(attr->ia_mode & S_ISGID))))
2240                 attr->ia_valid |= ATTR_FORCE;
2241
2242         if ((attr->ia_valid & ATTR_MODE) &&
2243             (mode & S_ISUID) &&
2244             !(attr->ia_mode & S_ISUID) &&
2245             !(attr->ia_valid & ATTR_KILL_SUID))
2246                 attr->ia_valid |= ATTR_KILL_SUID;
2247
2248         if ((attr->ia_valid & ATTR_MODE) &&
2249             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
2250             !(attr->ia_mode & S_ISGID) &&
2251             !(attr->ia_valid & ATTR_KILL_SGID))
2252                 attr->ia_valid |= ATTR_KILL_SGID;
2253
2254         return ll_setattr_raw(de, attr, xvalid, false);
2255 }
2256
2257 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
2258                        u32 flags)
2259 {
2260         struct obd_statfs obd_osfs = { 0 };
2261         time64_t max_age;
2262         int rc;
2263
2264         ENTRY;
2265         max_age = ktime_get_seconds() - sbi->ll_statfs_max_age;
2266
2267         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2268                 flags |= OBD_STATFS_NODELAY;
2269
2270         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
2271         if (rc)
2272                 RETURN(rc);
2273
2274         osfs->os_type = LL_SUPER_MAGIC;
2275
2276         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
2277               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
2278
2279         if (osfs->os_state & OS_STATFS_SUM)
2280                 GOTO(out, rc);
2281
2282         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
2283         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
2284                 GOTO(out, rc = 0);
2285
2286         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
2287                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
2288                obd_osfs.os_files);
2289
2290         osfs->os_bsize = obd_osfs.os_bsize;
2291         osfs->os_blocks = obd_osfs.os_blocks;
2292         osfs->os_bfree = obd_osfs.os_bfree;
2293         osfs->os_bavail = obd_osfs.os_bavail;
2294
2295         /* If we have _some_ OSTs, but don't have as many free objects on the
2296          * OSTs as inodes on the MDTs, reduce the reported number of inodes
2297          * to compensate, so that the "inodes in use" number is correct.
2298          * This should be kept in sync with lod_statfs() behaviour.
2299          */
2300         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
2301                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
2302                                  obd_osfs.os_ffree;
2303                 osfs->os_ffree = obd_osfs.os_ffree;
2304         }
2305
2306 out:
2307         RETURN(rc);
2308 }
2309
2310 static int ll_statfs_project(struct inode *inode, struct kstatfs *sfs)
2311 {
2312         struct if_quotactl qctl = {
2313                 .qc_cmd = LUSTRE_Q_GETQUOTA,
2314                 .qc_type = PRJQUOTA,
2315                 .qc_valid = QC_GENERAL,
2316         };
2317         u64 limit, curblock;
2318         int ret;
2319
2320         qctl.qc_id = ll_i2info(inode)->lli_projid;
2321         ret = quotactl_ioctl(ll_i2sbi(inode), &qctl);
2322         if (ret) {
2323                 /* ignore errors if project ID does not have
2324                  * a quota limit or feature unsupported.
2325                  */
2326                 if (ret == -ESRCH || ret == -EOPNOTSUPP)
2327                         ret = 0;
2328                 return ret;
2329         }
2330
2331         limit = ((qctl.qc_dqblk.dqb_bsoftlimit ?
2332                  qctl.qc_dqblk.dqb_bsoftlimit :
2333                  qctl.qc_dqblk.dqb_bhardlimit) * 1024) / sfs->f_bsize;
2334         if (limit && sfs->f_blocks > limit) {
2335                 curblock = (qctl.qc_dqblk.dqb_curspace +
2336                                 sfs->f_bsize - 1) / sfs->f_bsize;
2337                 sfs->f_blocks = limit;
2338                 sfs->f_bfree = sfs->f_bavail =
2339                         (sfs->f_blocks > curblock) ?
2340                         (sfs->f_blocks - curblock) : 0;
2341         }
2342
2343         limit = qctl.qc_dqblk.dqb_isoftlimit ?
2344                 qctl.qc_dqblk.dqb_isoftlimit :
2345                 qctl.qc_dqblk.dqb_ihardlimit;
2346         if (limit && sfs->f_files > limit) {
2347                 sfs->f_files = limit;
2348                 sfs->f_ffree = (sfs->f_files >
2349                         qctl.qc_dqblk.dqb_curinodes) ?
2350                         (sfs->f_files - qctl.qc_dqblk.dqb_curinodes) : 0;
2351         }
2352
2353         return 0;
2354 }
2355
2356 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
2357 {
2358         struct super_block *sb = de->d_sb;
2359         struct obd_statfs osfs;
2360         __u64 fsid = huge_encode_dev(sb->s_dev);
2361         ktime_t kstart = ktime_get();
2362         int rc;
2363
2364         CDEBUG(D_VFSTRACE, "VFS Op:sb=%s (%p)\n", sb->s_id, sb);
2365
2366         /* Some amount of caching on the client is allowed */
2367         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
2368         if (rc)
2369                 return rc;
2370
2371         statfs_unpack(sfs, &osfs);
2372
2373         /* We need to downshift for all 32-bit kernels, because we can't
2374          * tell if the kernel is being called via sys_statfs64() or not.
2375          * Stop before overflowing f_bsize - in which case it is better
2376          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
2377         if (sizeof(long) < 8) {
2378                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
2379                         sfs->f_bsize <<= 1;
2380
2381                         osfs.os_blocks >>= 1;
2382                         osfs.os_bfree >>= 1;
2383                         osfs.os_bavail >>= 1;
2384                 }
2385         }
2386
2387         sfs->f_blocks = osfs.os_blocks;
2388         sfs->f_bfree = osfs.os_bfree;
2389         sfs->f_bavail = osfs.os_bavail;
2390         sfs->f_fsid.val[0] = (__u32)fsid;
2391         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
2392         if (ll_i2info(de->d_inode)->lli_projid)
2393                 return ll_statfs_project(de->d_inode, sfs);
2394
2395         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STATFS,
2396                            ktime_us_delta(ktime_get(), kstart));
2397
2398         return 0;
2399 }
2400
2401 void ll_inode_size_lock(struct inode *inode)
2402 {
2403         struct ll_inode_info *lli;
2404
2405         LASSERT(!S_ISDIR(inode->i_mode));
2406
2407         lli = ll_i2info(inode);
2408         mutex_lock(&lli->lli_size_mutex);
2409 }
2410
2411 void ll_inode_size_unlock(struct inode *inode)
2412 {
2413         struct ll_inode_info *lli;
2414
2415         lli = ll_i2info(inode);
2416         mutex_unlock(&lli->lli_size_mutex);
2417 }
2418
2419 void ll_update_inode_flags(struct inode *inode, unsigned int ext_flags)
2420 {
2421         /* do not clear encryption flag */
2422         ext_flags |= ll_inode_to_ext_flags(inode->i_flags) & LUSTRE_ENCRYPT_FL;
2423         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
2424         if (ext_flags & LUSTRE_PROJINHERIT_FL)
2425                 set_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags);
2426         else
2427                 clear_bit(LLIF_PROJECT_INHERIT, &ll_i2info(inode)->lli_flags);
2428 }
2429
2430 int ll_update_inode(struct inode *inode, struct lustre_md *md)
2431 {
2432         struct ll_inode_info *lli = ll_i2info(inode);
2433         struct mdt_body *body = md->body;
2434         struct ll_sb_info *sbi = ll_i2sbi(inode);
2435         int rc = 0;
2436
2437         if (body->mbo_valid & OBD_MD_FLEASIZE) {
2438                 rc = cl_file_inode_init(inode, md);
2439                 if (rc)
2440                         return rc;
2441         }
2442
2443         if (S_ISDIR(inode->i_mode)) {
2444                 rc = ll_update_lsm_md(inode, md);
2445                 if (rc != 0)
2446                         return rc;
2447         }
2448
2449         if (body->mbo_valid & OBD_MD_FLACL)
2450                 lli_replace_acl(lli, md);
2451
2452         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
2453                                         sbi->ll_flags & LL_SBI_32BIT_API);
2454         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
2455
2456         if (body->mbo_valid & OBD_MD_FLATIME) {
2457                 if (body->mbo_atime > inode->i_atime.tv_sec)
2458                         inode->i_atime.tv_sec = body->mbo_atime;
2459                 lli->lli_atime = body->mbo_atime;
2460         }
2461
2462         if (body->mbo_valid & OBD_MD_FLMTIME) {
2463                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
2464                         CDEBUG(D_INODE,
2465                                "setting ino %lu mtime from %lld to %llu\n",
2466                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
2467                                body->mbo_mtime);
2468                         inode->i_mtime.tv_sec = body->mbo_mtime;
2469                 }
2470                 lli->lli_mtime = body->mbo_mtime;
2471         }
2472
2473         if (body->mbo_valid & OBD_MD_FLCTIME) {
2474                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2475                         inode->i_ctime.tv_sec = body->mbo_ctime;
2476                 lli->lli_ctime = body->mbo_ctime;
2477         }
2478
2479         if (body->mbo_valid & OBD_MD_FLBTIME)
2480                 lli->lli_btime = body->mbo_btime;
2481
2482         /* Clear i_flags to remove S_NOSEC before permissions are updated */
2483         if (body->mbo_valid & OBD_MD_FLFLAGS)
2484                 ll_update_inode_flags(inode, body->mbo_flags);
2485         if (body->mbo_valid & OBD_MD_FLMODE)
2486                 inode->i_mode = (inode->i_mode & S_IFMT) |
2487                                 (body->mbo_mode & ~S_IFMT);
2488
2489         if (body->mbo_valid & OBD_MD_FLTYPE)
2490                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2491                                 (body->mbo_mode & S_IFMT);
2492
2493         LASSERT(inode->i_mode != 0);
2494         if (body->mbo_valid & OBD_MD_FLUID)
2495                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2496         if (body->mbo_valid & OBD_MD_FLGID)
2497                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2498         if (body->mbo_valid & OBD_MD_FLPROJID)
2499                 lli->lli_projid = body->mbo_projid;
2500         if (body->mbo_valid & OBD_MD_FLNLINK)
2501                 set_nlink(inode, body->mbo_nlink);
2502         if (body->mbo_valid & OBD_MD_FLRDEV)
2503                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2504
2505         if (body->mbo_valid & OBD_MD_FLID) {
2506                 /* FID shouldn't be changed! */
2507                 if (fid_is_sane(&lli->lli_fid)) {
2508                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2509                                  "Trying to change FID "DFID
2510                                  " to the "DFID", inode "DFID"(%p)\n",
2511                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2512                                  PFID(ll_inode2fid(inode)), inode);
2513                 } else {
2514                         lli->lli_fid = body->mbo_fid1;
2515                 }
2516         }
2517
2518         LASSERT(fid_seq(&lli->lli_fid) != 0);
2519
2520         lli->lli_attr_valid = body->mbo_valid;
2521         if (body->mbo_valid & OBD_MD_FLSIZE) {
2522                 i_size_write(inode, body->mbo_size);
2523
2524                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2525                        PFID(ll_inode2fid(inode)),
2526                        (unsigned long long)body->mbo_size);
2527
2528                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2529                         inode->i_blocks = body->mbo_blocks;
2530         } else {
2531                 if (body->mbo_valid & OBD_MD_FLLAZYSIZE)
2532                         lli->lli_lazysize = body->mbo_size;
2533                 if (body->mbo_valid & OBD_MD_FLLAZYBLOCKS)
2534                         lli->lli_lazyblocks = body->mbo_blocks;
2535         }
2536
2537         if (body->mbo_valid & OBD_MD_TSTATE) {
2538                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2539                  * clear it when done to ensure to start again
2540                  * glimpsing updated attrs
2541                  */
2542                 if (body->mbo_t_state & MS_RESTORE)
2543                         set_bit(LLIF_FILE_RESTORING, &lli->lli_flags);
2544                 else
2545                         clear_bit(LLIF_FILE_RESTORING, &lli->lli_flags);
2546         }
2547
2548         return 0;
2549 }
2550
2551 void ll_truncate_inode_pages_final(struct inode *inode)
2552 {
2553         struct address_space *mapping = &inode->i_data;
2554         unsigned long nrpages;
2555         unsigned long flags;
2556
2557         truncate_inode_pages_final(mapping);
2558
2559         /* Workaround for LU-118: Note nrpages may not be totally updated when
2560          * truncate_inode_pages() returns, as there can be a page in the process
2561          * of deletion (inside __delete_from_page_cache()) in the specified
2562          * range. Thus mapping->nrpages can be non-zero when this function
2563          * returns even after truncation of the whole mapping.  Only do this if
2564          * npages isn't already zero.
2565          */
2566         nrpages = mapping->nrpages;
2567         if (nrpages) {
2568                 ll_xa_lock_irqsave(&mapping->i_pages, flags);
2569                 nrpages = mapping->nrpages;
2570                 ll_xa_unlock_irqrestore(&mapping->i_pages, flags);
2571         } /* Workaround end */
2572
2573         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2574                  "see https://jira.whamcloud.com/browse/LU-118\n",
2575                  ll_i2sbi(inode)->ll_fsname,
2576                  PFID(ll_inode2fid(inode)), inode, nrpages);
2577 }
2578
2579 int ll_read_inode2(struct inode *inode, void *opaque)
2580 {
2581         struct lustre_md *md = opaque;
2582         struct ll_inode_info *lli = ll_i2info(inode);
2583         int     rc;
2584         ENTRY;
2585
2586         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2587                PFID(&lli->lli_fid), inode);
2588
2589         /* Core attributes from the MDS first.  This is a new inode, and
2590          * the VFS doesn't zero times in the core inode so we have to do
2591          * it ourselves.  They will be overwritten by either MDS or OST
2592          * attributes - we just need to make sure they aren't newer.
2593          */
2594         inode->i_mtime.tv_sec = 0;
2595         inode->i_atime.tv_sec = 0;
2596         inode->i_ctime.tv_sec = 0;
2597         inode->i_rdev = 0;
2598         rc = ll_update_inode(inode, md);
2599         if (rc != 0)
2600                 RETURN(rc);
2601
2602         /* OIDEBUG(inode); */
2603
2604 #ifdef HAVE_BACKING_DEV_INFO
2605         /* initializing backing dev info. */
2606         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2607 #endif
2608         if (S_ISREG(inode->i_mode)) {
2609                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2610                 inode->i_op = &ll_file_inode_operations;
2611                 inode->i_fop = sbi->ll_fop;
2612                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2613                 EXIT;
2614         } else if (S_ISDIR(inode->i_mode)) {
2615                 inode->i_op = &ll_dir_inode_operations;
2616                 inode->i_fop = &ll_dir_operations;
2617                 EXIT;
2618         } else if (S_ISLNK(inode->i_mode)) {
2619                 inode->i_op = &ll_fast_symlink_inode_operations;
2620                 EXIT;
2621         } else {
2622                 inode->i_op = &ll_special_inode_operations;
2623
2624                 init_special_inode(inode, inode->i_mode,
2625                                    inode->i_rdev);
2626
2627                 EXIT;
2628         }
2629
2630         return 0;
2631 }
2632
2633 void ll_delete_inode(struct inode *inode)
2634 {
2635         struct ll_inode_info *lli = ll_i2info(inode);
2636         ENTRY;
2637
2638         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2639                 /* It is last chance to write out dirty pages,
2640                  * otherwise we may lose data while umount.
2641                  *
2642                  * If i_nlink is 0 then just discard data. This is safe because
2643                  * local inode gets i_nlink 0 from server only for the last
2644                  * unlink, so that file is not opened somewhere else
2645                  */
2646                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2647                                    CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2648         }
2649
2650         ll_truncate_inode_pages_final(inode);
2651         ll_clear_inode(inode);
2652         clear_inode(inode);
2653
2654         EXIT;
2655 }
2656
2657 int ll_iocontrol(struct inode *inode, struct file *file,
2658                  unsigned int cmd, unsigned long arg)
2659 {
2660         struct ll_sb_info *sbi = ll_i2sbi(inode);
2661         struct ptlrpc_request *req = NULL;
2662         int rc, flags = 0;
2663         ENTRY;
2664
2665         switch (cmd) {
2666         case FS_IOC_GETFLAGS: {
2667                 struct mdt_body *body;
2668                 struct md_op_data *op_data;
2669
2670                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2671                                              0, 0, LUSTRE_OPC_ANY,
2672                                              NULL);
2673                 if (IS_ERR(op_data))
2674                         RETURN(PTR_ERR(op_data));
2675
2676                 op_data->op_valid = OBD_MD_FLFLAGS;
2677                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2678                 ll_finish_md_op_data(op_data);
2679                 if (rc) {
2680                         CERROR("%s: failure inode "DFID": rc = %d\n",
2681                                sbi->ll_md_exp->exp_obd->obd_name,
2682                                PFID(ll_inode2fid(inode)), rc);
2683                         RETURN(-abs(rc));
2684                 }
2685
2686                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2687
2688                 flags = body->mbo_flags;
2689
2690                 ptlrpc_req_finished(req);
2691
2692                 RETURN(put_user(flags, (int __user *)arg));
2693         }
2694         case FS_IOC_SETFLAGS: {
2695                 struct iattr *attr;
2696                 struct md_op_data *op_data;
2697                 struct cl_object *obj;
2698                 struct fsxattr fa = { 0 };
2699
2700                 if (get_user(flags, (int __user *)arg))
2701                         RETURN(-EFAULT);
2702
2703                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2704                 if (flags & LUSTRE_PROJINHERIT_FL)
2705                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2706
2707                 rc = ll_ioctl_check_project(inode, &fa);
2708                 if (rc)
2709                         RETURN(rc);
2710
2711                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2712                                              LUSTRE_OPC_ANY, NULL);
2713                 if (IS_ERR(op_data))
2714                         RETURN(PTR_ERR(op_data));
2715
2716                 op_data->op_attr_flags = flags;
2717                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2718                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2719                 ll_finish_md_op_data(op_data);
2720                 ptlrpc_req_finished(req);
2721                 if (rc)
2722                         RETURN(rc);
2723
2724                 ll_update_inode_flags(inode, flags);
2725
2726                 obj = ll_i2info(inode)->lli_clob;
2727                 if (obj == NULL)
2728                         RETURN(0);
2729
2730                 OBD_ALLOC_PTR(attr);
2731                 if (attr == NULL)
2732                         RETURN(-ENOMEM);
2733
2734                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2735
2736                 OBD_FREE_PTR(attr);
2737                 RETURN(rc);
2738         }
2739         default:
2740                 RETURN(-ENOSYS);
2741         }
2742
2743         RETURN(0);
2744 }
2745
2746 int ll_flush_ctx(struct inode *inode)
2747 {
2748         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2749
2750         CDEBUG(D_SEC, "flush context for user %d\n",
2751                from_kuid(&init_user_ns, current_uid()));
2752
2753         obd_set_info_async(NULL, sbi->ll_md_exp,
2754                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2755                            0, NULL, NULL);
2756         obd_set_info_async(NULL, sbi->ll_dt_exp,
2757                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2758                            0, NULL, NULL);
2759         return 0;
2760 }
2761
2762 /* umount -f client means force down, don't save state */
2763 void ll_umount_begin(struct super_block *sb)
2764 {
2765         struct ll_sb_info *sbi = ll_s2sbi(sb);
2766         struct obd_device *obd;
2767         struct obd_ioctl_data *ioc_data;
2768         int cnt;
2769         ENTRY;
2770
2771         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2772                sb->s_count, atomic_read(&sb->s_active));
2773
2774         obd = class_exp2obd(sbi->ll_md_exp);
2775         if (obd == NULL) {
2776                 CERROR("Invalid MDC connection handle %#llx\n",
2777                        sbi->ll_md_exp->exp_handle.h_cookie);
2778                 EXIT;
2779                 return;
2780         }
2781         obd->obd_force = 1;
2782
2783         obd = class_exp2obd(sbi->ll_dt_exp);
2784         if (obd == NULL) {
2785                 CERROR("Invalid LOV connection handle %#llx\n",
2786                        sbi->ll_dt_exp->exp_handle.h_cookie);
2787                 EXIT;
2788                 return;
2789         }
2790         obd->obd_force = 1;
2791
2792         OBD_ALLOC_PTR(ioc_data);
2793         if (ioc_data) {
2794                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2795                               sizeof *ioc_data, ioc_data, NULL);
2796
2797                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2798                               sizeof *ioc_data, ioc_data, NULL);
2799
2800                 OBD_FREE_PTR(ioc_data);
2801         }
2802
2803         /* Really, we'd like to wait until there are no requests outstanding,
2804          * and then continue.  For now, we just periodically checking for vfs
2805          * to decrement mnt_cnt and hope to finish it within 10sec.
2806          */
2807         cnt = 10;
2808         while (cnt > 0 &&
2809                !may_umount(sbi->ll_mnt.mnt)) {
2810                 ssleep(1);
2811                 cnt -= 1;
2812         }
2813
2814         EXIT;
2815 }
2816
2817 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2818 {
2819         struct ll_sb_info *sbi = ll_s2sbi(sb);
2820         char *profilenm = get_profile_name(sb);
2821         int err;
2822         __u32 read_only;
2823
2824         if ((*flags & MS_RDONLY) != (sb->s_flags & SB_RDONLY)) {
2825                 read_only = *flags & MS_RDONLY;
2826                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2827                                          sizeof(KEY_READ_ONLY),
2828                                          KEY_READ_ONLY, sizeof(read_only),
2829                                          &read_only, NULL);
2830                 if (err) {
2831                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2832                                       profilenm, read_only ?
2833                                       "read-only" : "read-write", err);
2834                         return err;
2835                 }
2836
2837                 if (read_only)
2838                         sb->s_flags |= SB_RDONLY;
2839                 else
2840                         sb->s_flags &= ~SB_RDONLY;
2841
2842                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2843                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2844                                       read_only ?  "read-only" : "read-write");
2845         }
2846         return 0;
2847 }
2848
2849 /**
2850  * Cleanup the open handle that is cached on MDT-side.
2851  *
2852  * For open case, the client side open handling thread may hit error
2853  * after the MDT grant the open. Under such case, the client should
2854  * send close RPC to the MDT as cleanup; otherwise, the open handle
2855  * on the MDT will be leaked there until the client umount or evicted.
2856  *
2857  * In further, if someone unlinked the file, because the open handle
2858  * holds the reference on such file/object, then it will block the
2859  * subsequent threads that want to locate such object via FID.
2860  *
2861  * \param[in] sb        super block for this file-system
2862  * \param[in] open_req  pointer to the original open request
2863  */
2864 void ll_open_cleanup(struct super_block *sb, struct req_capsule *pill)
2865 {
2866         struct mdt_body                 *body;
2867         struct md_op_data               *op_data;
2868         struct ptlrpc_request           *close_req = NULL;
2869         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2870         ENTRY;
2871
2872         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
2873         OBD_ALLOC_PTR(op_data);
2874         if (op_data == NULL) {
2875                 CWARN("%s: cannot allocate op_data to release open handle for "
2876                       DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2877
2878                 RETURN_EXIT;
2879         }
2880
2881         op_data->op_fid1 = body->mbo_fid1;
2882         op_data->op_open_handle = body->mbo_open_handle;
2883         op_data->op_mod_time = ktime_get_real_seconds();
2884         md_close(exp, op_data, NULL, &close_req);
2885         ptlrpc_req_finished(close_req);
2886         ll_finish_md_op_data(op_data);
2887
2888         EXIT;
2889 }
2890
2891 int ll_prep_inode(struct inode **inode, struct req_capsule *pill,
2892                   struct super_block *sb, struct lookup_intent *it)
2893 {
2894         struct ll_sb_info *sbi = NULL;
2895         struct lustre_md md = { NULL };
2896         bool default_lmv_deleted = false;
2897         int rc;
2898
2899         ENTRY;
2900
2901         LASSERT(*inode || sb);
2902         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2903         rc = md_get_lustre_md(sbi->ll_md_exp, pill, sbi->ll_dt_exp,
2904                               sbi->ll_md_exp, &md);
2905         if (rc != 0)
2906                 GOTO(out, rc);
2907
2908         /*
2909          * clear default_lmv only if intent_getattr reply doesn't contain it.
2910          * but it needs to be done after iget, check this early because
2911          * ll_update_lsm_md() may change md.
2912          */
2913         if (it && (it->it_op & (IT_LOOKUP | IT_GETATTR)) &&
2914             S_ISDIR(md.body->mbo_mode) && !md.default_lmv)
2915                 default_lmv_deleted = true;
2916
2917         if (*inode) {
2918                 rc = ll_update_inode(*inode, &md);
2919                 if (rc != 0)
2920                         GOTO(out, rc);
2921         } else {
2922                 LASSERT(sb != NULL);
2923
2924                 /*
2925                  * At this point server returns to client's same fid as client
2926                  * generated for creating. So using ->fid1 is okay here.
2927                  */
2928                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2929                         CERROR("%s: Fid is insane "DFID"\n",
2930                                 sbi->ll_fsname,
2931                                 PFID(&md.body->mbo_fid1));
2932                         GOTO(out, rc = -EINVAL);
2933                 }
2934
2935                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2936                                              sbi->ll_flags & LL_SBI_32BIT_API),
2937                                  &md);
2938                 if (IS_ERR(*inode)) {
2939                         lmd_clear_acl(&md);
2940                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2941                         *inode = NULL;
2942                         CERROR("new_inode -fatal: rc %d\n", rc);
2943                         GOTO(out, rc);
2944                 }
2945         }
2946
2947         /* Handling piggyback layout lock.
2948          * Layout lock can be piggybacked by getattr and open request.
2949          * The lsm can be applied to inode only if it comes with a layout lock
2950          * otherwise correct layout may be overwritten, for example:
2951          * 1. proc1: mdt returns a lsm but not granting layout
2952          * 2. layout was changed by another client
2953          * 3. proc2: refresh layout and layout lock granted
2954          * 4. proc1: to apply a stale layout */
2955         if (it != NULL && it->it_lock_mode != 0) {
2956                 struct lustre_handle lockh;
2957                 struct ldlm_lock *lock;
2958
2959                 lockh.cookie = it->it_lock_handle;
2960                 lock = ldlm_handle2lock(&lockh);
2961                 LASSERT(lock != NULL);
2962                 if (ldlm_has_layout(lock)) {
2963                         struct cl_object_conf conf;
2964
2965                         memset(&conf, 0, sizeof(conf));
2966                         conf.coc_opc = OBJECT_CONF_SET;
2967                         conf.coc_inode = *inode;
2968                         conf.coc_lock = lock;
2969                         conf.u.coc_layout = md.layout;
2970                         (void)ll_layout_conf(*inode, &conf);
2971                 }
2972                 LDLM_LOCK_PUT(lock);
2973         }
2974
2975         if (default_lmv_deleted)
2976                 ll_update_default_lsm_md(*inode, &md);
2977
2978         /* we may want to apply some policy for foreign file/dir */
2979         if (ll_sbi_has_foreign_symlink(sbi)) {
2980                 rc = ll_manage_foreign(*inode, &md);
2981                 if (rc < 0)
2982                         GOTO(out, rc);
2983         }
2984
2985         GOTO(out, rc = 0);
2986
2987 out:
2988         /* cleanup will be done if necessary */
2989         md_free_lustre_md(sbi->ll_md_exp, &md);
2990
2991         if (rc != 0 && it != NULL && it->it_op & IT_OPEN) {
2992                 ll_intent_drop_lock(it);
2993                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, pill);
2994         }
2995
2996         return rc;
2997 }
2998
2999 int ll_obd_statfs(struct inode *inode, void __user *arg)
3000 {
3001         struct ll_sb_info *sbi = NULL;
3002         struct obd_export *exp;
3003         struct obd_ioctl_data *data = NULL;
3004         __u32 type;
3005         int len = 0, rc;
3006
3007         if (inode)
3008                 sbi = ll_i2sbi(inode);
3009         if (!sbi)
3010                 GOTO(out_statfs, rc = -EINVAL);
3011
3012         rc = obd_ioctl_getdata(&data, &len, arg);
3013         if (rc)
3014                 GOTO(out_statfs, rc);
3015
3016         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
3017             !data->ioc_pbuf1 || !data->ioc_pbuf2)
3018                 GOTO(out_statfs, rc = -EINVAL);
3019
3020         if (data->ioc_inllen1 != sizeof(__u32) ||
3021             data->ioc_inllen2 != sizeof(__u32) ||
3022             data->ioc_plen1 != sizeof(struct obd_statfs) ||
3023             data->ioc_plen2 != sizeof(struct obd_uuid))
3024                 GOTO(out_statfs, rc = -EINVAL);
3025
3026         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
3027         if (type & LL_STATFS_LMV)
3028                 exp = sbi->ll_md_exp;
3029         else if (type & LL_STATFS_LOV)
3030                 exp = sbi->ll_dt_exp;
3031         else
3032                 GOTO(out_statfs, rc = -ENODEV);
3033
3034         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, data, NULL);
3035         if (rc)
3036                 GOTO(out_statfs, rc);
3037 out_statfs:
3038         OBD_FREE_LARGE(data, len);
3039         return rc;
3040 }
3041
3042 /*
3043  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
3044  * be called early to avoid deadlock.
3045  */
3046 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
3047 {
3048         if (op_data->op_mea2_sem) {
3049                 up_read_non_owner(op_data->op_mea2_sem);
3050                 op_data->op_mea2_sem = NULL;
3051         }
3052
3053         if (op_data->op_mea1_sem) {
3054                 up_read_non_owner(op_data->op_mea1_sem);
3055                 op_data->op_mea1_sem = NULL;
3056         }
3057 }
3058
3059 /* this function prepares md_op_data hint for passing it down to MD stack. */
3060 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
3061                                       struct inode *i1, struct inode *i2,
3062                                       const char *name, size_t namelen,
3063                                       __u32 mode, enum md_op_code opc,
3064                                       void *data)
3065 {
3066         LASSERT(i1 != NULL);
3067
3068         if (name == NULL) {
3069                 /* Do not reuse namelen for something else. */
3070                 if (namelen != 0)
3071                         return ERR_PTR(-EINVAL);
3072         } else {
3073                 if (namelen > ll_i2sbi(i1)->ll_namelen)
3074                         return ERR_PTR(-ENAMETOOLONG);
3075
3076                 /* "/" is not valid name, but it's allowed */
3077                 if (!lu_name_is_valid_2(name, namelen) &&
3078                     strncmp("/", name, namelen) != 0)
3079                         return ERR_PTR(-EINVAL);
3080         }
3081
3082         if (op_data == NULL)
3083                 OBD_ALLOC_PTR(op_data);
3084
3085         if (op_data == NULL)
3086                 return ERR_PTR(-ENOMEM);
3087
3088         ll_i2gids(op_data->op_suppgids, i1, i2);
3089         op_data->op_fid1 = *ll_inode2fid(i1);
3090         op_data->op_code = opc;
3091
3092         if (S_ISDIR(i1->i_mode)) {
3093                 down_read_non_owner(&ll_i2info(i1)->lli_lsm_sem);
3094                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
3095                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
3096                 op_data->op_default_mea1 = ll_i2info(i1)->lli_default_lsm_md;
3097         }
3098
3099         if (i2) {
3100                 op_data->op_fid2 = *ll_inode2fid(i2);
3101                 if (S_ISDIR(i2->i_mode)) {
3102                         if (i2 != i1) {
3103                                 /* i2 is typically a child of i1, and MUST be
3104                                  * further from the root to avoid deadlocks.
3105                                  */
3106                                 down_read_non_owner(&ll_i2info(i2)->lli_lsm_sem);
3107                                 op_data->op_mea2_sem =
3108                                                 &ll_i2info(i2)->lli_lsm_sem;
3109                         }
3110                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
3111                 }
3112         } else {
3113                 fid_zero(&op_data->op_fid2);
3114         }
3115
3116         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
3117                 op_data->op_cli_flags |= CLI_HASH64;
3118
3119         if (ll_need_32bit_api(ll_i2sbi(i1)))
3120                 op_data->op_cli_flags |= CLI_API32;
3121
3122         op_data->op_name = name;
3123         op_data->op_namelen = namelen;
3124         op_data->op_mode = mode;
3125         op_data->op_mod_time = ktime_get_real_seconds();
3126         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
3127         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
3128         op_data->op_cap = cfs_curproc_cap_pack();
3129         op_data->op_mds = 0;
3130         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
3131              filename_is_volatile(name, namelen, &op_data->op_mds)) {
3132                 op_data->op_bias |= MDS_CREATE_VOLATILE;
3133         }
3134         op_data->op_data = data;
3135
3136         return op_data;
3137 }
3138
3139 void ll_finish_md_op_data(struct md_op_data *op_data)
3140 {
3141         ll_unlock_md_op_lsm(op_data);
3142         ll_security_release_secctx(op_data->op_file_secctx,
3143                                    op_data->op_file_secctx_size);
3144         llcrypt_free_ctx(op_data->op_file_encctx, op_data->op_file_encctx_size);
3145         OBD_FREE_PTR(op_data);
3146 }
3147
3148 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
3149 {
3150         struct ll_sb_info *sbi;
3151
3152         LASSERT(seq && dentry);
3153         sbi = ll_s2sbi(dentry->d_sb);
3154
3155         if (sbi->ll_flags & LL_SBI_NOLCK)
3156                 seq_puts(seq, ",nolock");
3157
3158         /* "flock" is the default since 2.13, but it wasn't for many years,
3159          * so it is still useful to print this to show it is enabled.
3160          * Start to print "noflock" so it is now clear when flock is disabled.
3161          */
3162         if (sbi->ll_flags & LL_SBI_FLOCK)
3163                 seq_puts(seq, ",flock");
3164         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
3165                 seq_puts(seq, ",localflock");
3166         else
3167                 seq_puts(seq, ",noflock");
3168
3169         if (sbi->ll_flags & LL_SBI_USER_XATTR)
3170                 seq_puts(seq, ",user_xattr");
3171
3172         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
3173                 seq_puts(seq, ",lazystatfs");
3174
3175         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
3176                 seq_puts(seq, ",user_fid2path");
3177
3178         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
3179                 seq_puts(seq, ",always_ping");
3180
3181         if (ll_sbi_has_test_dummy_encryption(sbi))
3182                 seq_puts(seq, ",test_dummy_encryption");
3183
3184         if (ll_sbi_has_encrypt(sbi))
3185                 seq_puts(seq, ",encrypt");
3186         else
3187                 seq_puts(seq, ",noencrypt");
3188
3189         if (sbi->ll_flags & LL_SBI_FOREIGN_SYMLINK) {
3190                 seq_puts(seq, ",foreign_symlink=");
3191                 seq_puts(seq, sbi->ll_foreign_symlink_prefix);
3192         }
3193
3194         RETURN(0);
3195 }
3196
3197 /**
3198  * Get obd name by cmd, and copy out to user space
3199  */
3200 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
3201 {
3202         struct ll_sb_info *sbi = ll_i2sbi(inode);
3203         struct obd_device *obd;
3204         ENTRY;
3205
3206         if (cmd == OBD_IOC_GETNAME_OLD || cmd == OBD_IOC_GETDTNAME)
3207                 obd = class_exp2obd(sbi->ll_dt_exp);
3208         else if (cmd == OBD_IOC_GETMDNAME)
3209                 obd = class_exp2obd(sbi->ll_md_exp);
3210         else
3211                 RETURN(-EINVAL);
3212
3213         if (!obd)
3214                 RETURN(-ENOENT);
3215
3216         if (copy_to_user((void __user *)arg, obd->obd_name,
3217                          strlen(obd->obd_name) + 1))
3218                 RETURN(-EFAULT);
3219
3220         RETURN(0);
3221 }
3222
3223 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
3224 {
3225         char *path = NULL;
3226
3227         struct path p;
3228
3229         p.dentry = dentry;
3230         p.mnt = current->fs->root.mnt;
3231         path_get(&p);
3232         path = d_path(&p, buf, bufsize);
3233         path_put(&p);
3234         return path;
3235 }
3236
3237 void ll_dirty_page_discard_warn(struct page *page, int ioret)
3238 {
3239         char *buf, *path = NULL;
3240         struct dentry *dentry = NULL;
3241         struct inode *inode = page->mapping->host;
3242
3243         /* this can be called inside spin lock so use GFP_ATOMIC. */
3244         buf = (char *)__get_free_page(GFP_ATOMIC);
3245         if (buf != NULL) {
3246                 dentry = d_find_alias(page->mapping->host);
3247                 if (dentry != NULL)
3248                         path = ll_d_path(dentry, buf, PAGE_SIZE);
3249         }
3250
3251         /* The below message is checked in recovery-small.sh test_24b */
3252         CDEBUG(D_WARNING,
3253                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
3254                "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
3255                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
3256                PFID(ll_inode2fid(inode)),
3257                (path && !IS_ERR(path)) ? path : "", ioret);
3258
3259         if (dentry != NULL)
3260                 dput(dentry);
3261
3262         if (buf != NULL)
3263                 free_page((unsigned long)buf);
3264 }
3265
3266 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
3267                         struct lov_user_md **kbuf)
3268 {
3269         struct lov_user_md      lum;
3270         ssize_t                 lum_size;
3271         ENTRY;
3272
3273         if (copy_from_user(&lum, md, sizeof(lum)))
3274                 RETURN(-EFAULT);
3275
3276         lum_size = ll_lov_user_md_size(&lum);
3277         if (lum_size < 0)
3278                 RETURN(lum_size);
3279
3280         OBD_ALLOC_LARGE(*kbuf, lum_size);
3281         if (*kbuf == NULL)
3282                 RETURN(-ENOMEM);
3283
3284         if (copy_from_user(*kbuf, md, lum_size) != 0) {
3285                 OBD_FREE_LARGE(*kbuf, lum_size);
3286                 RETURN(-EFAULT);
3287         }
3288
3289         RETURN(lum_size);
3290 }
3291
3292 /*
3293  * Compute llite root squash state after a change of root squash
3294  * configuration setting or add/remove of a lnet nid
3295  */
3296 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
3297 {
3298         struct root_squash_info *squash = &sbi->ll_squash;
3299         int i;
3300         bool matched;
3301         struct lnet_process_id id;
3302
3303         /* Update norootsquash flag */
3304         spin_lock(&squash->rsi_lock);
3305         if (list_empty(&squash->rsi_nosquash_nids))
3306                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
3307         else {
3308                 /* Do not apply root squash as soon as one of our NIDs is
3309                  * in the nosquash_nids list */
3310                 matched = false;
3311                 i = 0;
3312                 while (LNetGetId(i++, &id) != -ENOENT) {
3313                         if (id.nid == LNET_NID_LO_0)
3314                                 continue;
3315                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
3316                                 matched = true;
3317                                 break;
3318                         }
3319                 }
3320                 if (matched)
3321                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
3322                 else
3323                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
3324         }
3325         spin_unlock(&squash->rsi_lock);
3326 }
3327
3328 /**
3329  * Parse linkea content to extract information about a given hardlink
3330  *
3331  * \param[in]   ldata      - Initialized linkea data
3332  * \param[in]   linkno     - Link identifier
3333  * \param[out]  parent_fid - The entry's parent FID
3334  * \param[out]  ln         - Entry name destination buffer
3335  *
3336  * \retval 0 on success
3337  * \retval Appropriate negative error code on failure
3338  */
3339 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
3340                             struct lu_fid *parent_fid, struct lu_name *ln)
3341 {
3342         unsigned int    idx;
3343         int             rc;
3344         ENTRY;
3345
3346         rc = linkea_init_with_rec(ldata);
3347         if (rc < 0)
3348                 RETURN(rc);
3349
3350         if (linkno >= ldata->ld_leh->leh_reccount)
3351                 /* beyond last link */
3352                 RETURN(-ENODATA);
3353
3354         linkea_first_entry(ldata);
3355         for (idx = 0; ldata->ld_lee != NULL; idx++) {
3356                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
3357                                     parent_fid);
3358                 if (idx == linkno)
3359                         break;
3360
3361                 linkea_next_entry(ldata);
3362         }
3363
3364         if (idx < linkno)
3365                 RETURN(-ENODATA);
3366
3367         RETURN(0);
3368 }
3369
3370 /**
3371  * Get parent FID and name of an identified link. Operation is performed for
3372  * a given link number, letting the caller iterate over linkno to list one or
3373  * all links of an entry.
3374  *
3375  * \param[in]     file - File descriptor against which to perform the operation
3376  * \param[in,out] arg  - User-filled structure containing the linkno to operate
3377  *                       on and the available size. It is eventually filled with
3378  *                       the requested information or left untouched on error
3379  *
3380  * \retval - 0 on success
3381  * \retval - Appropriate negative error code on failure
3382  */
3383 int ll_getparent(struct file *file, struct getparent __user *arg)
3384 {
3385         struct inode            *inode = file_inode(file);
3386         struct linkea_data      *ldata;
3387         struct lu_buf            buf = LU_BUF_NULL;
3388         struct lu_name           ln;
3389         struct lu_fid            parent_fid;
3390         __u32                    linkno;
3391         __u32                    name_size;
3392         int                      rc;
3393
3394         ENTRY;
3395
3396         if (!capable(CAP_DAC_READ_SEARCH) &&
3397             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
3398                 RETURN(-EPERM);
3399
3400         if (get_user(name_size, &arg->gp_name_size))
3401                 RETURN(-EFAULT);
3402
3403         if (get_user(linkno, &arg->gp_linkno))
3404                 RETURN(-EFAULT);
3405
3406         if (name_size > PATH_MAX)
3407                 RETURN(-EINVAL);
3408
3409         OBD_ALLOC(ldata, sizeof(*ldata));
3410         if (ldata == NULL)
3411                 RETURN(-ENOMEM);
3412
3413         rc = linkea_data_new(ldata, &buf);
3414         if (rc < 0)
3415                 GOTO(ldata_free, rc);
3416
3417         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
3418                            buf.lb_len, OBD_MD_FLXATTR);
3419         if (rc < 0)
3420                 GOTO(lb_free, rc);
3421
3422         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
3423         if (rc < 0)
3424                 GOTO(lb_free, rc);
3425
3426         if (ln.ln_namelen >= name_size)
3427                 GOTO(lb_free, rc = -EOVERFLOW);
3428
3429         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
3430                 GOTO(lb_free, rc = -EFAULT);
3431
3432         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
3433                 GOTO(lb_free, rc = -EFAULT);
3434
3435         if (put_user('\0', arg->gp_name + ln.ln_namelen))
3436                 GOTO(lb_free, rc = -EFAULT);
3437
3438 lb_free:
3439         lu_buf_free(&buf);
3440 ldata_free:
3441         OBD_FREE(ldata, sizeof(*ldata));
3442
3443         RETURN(rc);
3444 }