lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/version.h>
  47 #include <linux/mm.h>
  48
  49 #include <lustre_ioctl.h>
  50 #include <lustre_ha.h>
  51 #include <lustre_dlm.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_disk.h>
  54 #include <lustre_param.h>
  55 #include <lustre_log.h>
  56 #include <cl_object.h>
  57 #include <obd_cksum.h>
  58 #include "llite_internal.h"
  59
  60 struct kmem_cache *ll_file_data_slab;
  61
  62 static struct list_head ll_super_blocks = LIST_HEAD_INIT(ll_super_blocks);
  63 static DEFINE_SPINLOCK(ll_sb_lock);
  64
  65 #ifndef log2
  66 #define log2(n) ffz(~(n))
  67 #endif
  68
  69 static struct ll_sb_info *ll_init_sbi(void)
  70 {
  71         struct ll_sb_info *sbi = NULL;
  72         unsigned long pages;
  73         unsigned long lru_page_max;
  74         struct sysinfo si;
  75         class_uuid_t uuid;
  76         int i;
  77         ENTRY;
  78
  79         OBD_ALLOC_PTR(sbi);
  80         if (sbi == NULL)
  81                 RETURN(NULL);
  82
  83         spin_lock_init(&sbi->ll_lock);
  84         mutex_init(&sbi->ll_lco.lco_lock);
  85         spin_lock_init(&sbi->ll_pp_extent_lock);
  86         spin_lock_init(&sbi->ll_process_lock);
  87         sbi->ll_rw_stats_on = 0;
  88
  89         si_meminfo(&si);
  90         pages = si.totalram - si.totalhigh;
  91         lru_page_max = pages / 2;
  92
  93         /* initialize ll_cache data */
  94         atomic_set(&sbi->ll_cache.ccc_users, 0);
  95         sbi->ll_cache.ccc_lru_max = lru_page_max;
  96         atomic_long_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
  97         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
  98         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
  99
 100         /* turn unstable check off by default as it impacts performance */
 101         sbi->ll_cache.ccc_unstable_check = 0;
 102         atomic_long_set(&sbi->ll_cache.ccc_unstable_nr, 0);
 103         init_waitqueue_head(&sbi->ll_cache.ccc_unstable_waitq);
 104
 105         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 106                                            SBI_DEFAULT_READAHEAD_MAX);
 107         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 108         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 109                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 110         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 111         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 112
 113         ll_generate_random_uuid(uuid);
 114         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 115         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 116
 117         spin_lock(&ll_sb_lock);
 118         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 119         spin_unlock(&ll_sb_lock);
 120
 121         sbi->ll_flags |= LL_SBI_VERBOSE;
 122 #ifdef ENABLE_CHECKSUM
 123         sbi->ll_flags |= LL_SBI_CHECKSUM;
 124 #endif
 125
 126 #ifdef HAVE_LRU_RESIZE_SUPPORT
 127         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 128 #endif
 129
 130         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 131                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 132                                pp_r_hist.oh_lock);
 133                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 134                                pp_w_hist.oh_lock);
 135         }
 136
 137         /* metadata statahead is enabled by default */
 138         sbi->ll_sa_max = LL_SA_RPC_DEF;
 139         atomic_set(&sbi->ll_sa_total, 0);
 140         atomic_set(&sbi->ll_sa_wrong, 0);
 141         atomic_set(&sbi->ll_sa_running, 0);
 142         atomic_set(&sbi->ll_agl_total, 0);
 143         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 144
 145         /* root squash */
 146         sbi->ll_squash.rsi_uid = 0;
 147         sbi->ll_squash.rsi_gid = 0;
 148         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 149         init_rwsem(&sbi->ll_squash.rsi_sem);
 150
 151         RETURN(sbi);
 152 }
 153
 154 static void ll_free_sbi(struct super_block *sb)
 155 {
 156         struct ll_sb_info *sbi = ll_s2sbi(sb);
 157         ENTRY;
 158
 159         if (sbi != NULL) {
 160                 spin_lock(&ll_sb_lock);
 161                 list_del(&sbi->ll_list);
 162                 spin_unlock(&ll_sb_lock);
 163                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 164                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 165                 OBD_FREE(sbi, sizeof(*sbi));
 166         }
 167         EXIT;
 168 }
 169
 170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 171                                     struct vfsmount *mnt)
 172 {
 173         struct inode *root = 0;
 174         struct ll_sb_info *sbi = ll_s2sbi(sb);
 175         struct obd_device *obd;
 176         struct obd_capa *oc = NULL;
 177         struct obd_statfs *osfs = NULL;
 178         struct ptlrpc_request *request = NULL;
 179         struct obd_connect_data *data = NULL;
 180         struct obd_uuid *uuid;
 181         struct md_op_data *op_data;
 182         struct lustre_md lmd;
 183         obd_valid valid;
 184         int size, err, checksum;
 185         ENTRY;
 186
 187         obd = class_name2obd(md);
 188         if (!obd) {
 189                 CERROR("MD %s: not setup or attached\n", md);
 190                 RETURN(-EINVAL);
 191         }
 192
 193         OBD_ALLOC_PTR(data);
 194         if (data == NULL)
 195                 RETURN(-ENOMEM);
 196
 197         OBD_ALLOC_PTR(osfs);
 198         if (osfs == NULL) {
 199                 OBD_FREE_PTR(data);
 200                 RETURN(-ENOMEM);
 201         }
 202
 203         /* indicate the features supported by this client */
 204         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 205                                   OBD_CONNECT_ATTRFID  |
 206                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 207                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 208                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 209                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 210                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 211                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 212                                   OBD_CONNECT_EINPROGRESS |
 213                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 214                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 215                                   OBD_CONNECT_MAX_EASIZE |
 216                                   OBD_CONNECT_FLOCK_DEAD |
 217                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 218                                   OBD_CONNECT_OPEN_BY_FID |
 219                                   OBD_CONNECT_DIR_STRIPE;
 220
 221         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 222                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 223
 224 #ifdef HAVE_LRU_RESIZE_SUPPORT
 225         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 226                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 227 #endif
 228 #ifdef CONFIG_FS_POSIX_ACL
 229         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 230 #endif
 231
 232         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 233                 /* flag mdc connection as lightweight, only used for test
 234                  * purpose, use with care */
 235                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 236
 237         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 238         data->ocd_version = LUSTRE_VERSION_CODE;
 239
 240         if (sb->s_flags & MS_RDONLY)
 241                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 242         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 243                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 244
 245 #ifdef HAVE_MS_FLOCK_LOCK
 246         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 247         sb->s_flags |= MS_FLOCK_LOCK;
 248 #endif
 249 #ifdef MS_HAS_NEW_AOPS
 250         sb->s_flags |= MS_HAS_NEW_AOPS;
 251 #endif
 252
 253         if (sbi->ll_flags & LL_SBI_FLOCK)
 254                 sbi->ll_fop = &ll_file_operations_flock;
 255         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 256                 sbi->ll_fop = &ll_file_operations;
 257         else
 258                 sbi->ll_fop = &ll_file_operations_noflock;
 259
 260         /* real client */
 261         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 262         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 263                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 264
 265         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 266
 267         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 268         if (err == -EBUSY) {
 269                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 270                                    "recovery, of which this client is not a "
 271                                    "part. Please wait for recovery to complete,"
 272                                    " abort, or time out.\n", md);
 273                 GOTO(out, err);
 274         } else if (err) {
 275                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 276                 GOTO(out, err);
 277         }
 278
 279         sbi->ll_md_exp->exp_connect_data = *data;
 280
 281         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 282                            LUSTRE_SEQ_METADATA);
 283         if (err) {
 284                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 285                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 286                 GOTO(out_md, err);
 287         }
 288
 289         /* For mount, we only need fs info from MDT0, and also in DNE, it
 290          * can make sure the client can be mounted as long as MDT0 is
 291          * avaible */
 292         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 293                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 294                         OBD_STATFS_FOR_MDT0);
 295         if (err)
 296                 GOTO(out_md_fid, err);
 297
 298         /* This needs to be after statfs to ensure connect has finished.
 299          * Note that "data" does NOT contain the valid connect reply.
 300          * If connecting to a 1.8 server there will be no LMV device, so
 301          * we can access the MDC export directly and exp_connect_flags will
 302          * be non-zero, but if accessing an upgraded 2.1 server it will
 303          * have the correct flags filled in.
 304          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 305         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 306         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 307             valid != CLIENT_CONNECT_MDT_REQD) {
 308                 char *buf;
 309
 310                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 311                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 312                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 313                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 314                                    "feature(s) needed for correct operation "
 315                                    "of this client (%s). Please upgrade "
 316                                    "server or downgrade client.\n",
 317                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 318                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 319                 GOTO(out_md_fid, err = -EPROTO);
 320         }
 321
 322         size = sizeof(*data);
 323         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 324                            KEY_CONN_DATA,  &size, data, NULL);
 325         if (err) {
 326                 CERROR("%s: Get connect data failed: rc = %d\n",
 327                        sbi->ll_md_exp->exp_obd->obd_name, err);
 328                 GOTO(out_md_fid, err);
 329         }
 330
 331         LASSERT(osfs->os_bsize);
 332         sb->s_blocksize = osfs->os_bsize;
 333         sb->s_blocksize_bits = log2(osfs->os_bsize);
 334         sb->s_magic = LL_SUPER_MAGIC;
 335         sb->s_maxbytes = MAX_LFS_FILESIZE;
 336         sbi->ll_namelen = osfs->os_namelen;
 337         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 338
 339         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 340             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 341                 LCONSOLE_INFO("Disabling user_xattr feature because "
 342                               "it is not supported on the server\n");
 343                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 344         }
 345
 346         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 347 #ifdef MS_POSIXACL
 348                 sb->s_flags |= MS_POSIXACL;
 349 #endif
 350                 sbi->ll_flags |= LL_SBI_ACL;
 351         } else {
 352                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 353 #ifdef MS_POSIXACL
 354                 sb->s_flags &= ~MS_POSIXACL;
 355 #endif
 356                 sbi->ll_flags &= ~LL_SBI_ACL;
 357         }
 358
 359         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 360                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 361                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 362                         LCONSOLE_INFO("client is set as remote by default.\n");
 363                 }
 364         } else {
 365                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 366                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 367                         LCONSOLE_INFO("client claims to be remote, but server "
 368                                       "rejected, forced to be local.\n");
 369                 }
 370         }
 371
 372         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 373                 LCONSOLE_INFO("client enabled MDS capability!\n");
 374                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 375         }
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 378                 LCONSOLE_INFO("client enabled OSS capability!\n");
 379                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 380         }
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 383                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 384
 385         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 386                 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
 387         else
 388                 sbi->ll_md_brw_pages = 1;
 389
 390         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 391                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 392
 393         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 394                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 395                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 396                                       "unknown maximum xattr size.\n", dt);
 397                 } else {
 398                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 399                         sbi->ll_xattr_cache_enabled = 1;
 400                 }
 401         }
 402
 403         obd = class_name2obd(dt);
 404         if (!obd) {
 405                 CERROR("DT %s: not setup or attached\n", dt);
 406                 GOTO(out_md_fid, err = -ENODEV);
 407         }
 408
 409         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 410                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 411                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 412                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 413                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 414                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 415                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 416                                   OBD_CONNECT_MAXBYTES |
 417                                   OBD_CONNECT_EINPROGRESS |
 418                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 419                                   OBD_CONNECT_LAYOUTLOCK |
 420                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK;
 421
 422         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 423                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 424
 425         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 426                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 427                  * disabled by default, because it can still be enabled on the
 428                  * fly via /proc. As a consequence, we still need to come to an
 429                  * agreement on the supported algorithms at connect time */
 430                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 431
 432                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 433                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 434                 else
 435                         data->ocd_cksum_types = cksum_types_supported_client();
 436         }
 437
 438 #ifdef HAVE_LRU_RESIZE_SUPPORT
 439         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 440 #endif
 441         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 442                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 443
 444         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 445                "ocd_grant: %d\n", data->ocd_connect_flags,
 446                data->ocd_version, data->ocd_grant);
 447
 448         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 449         obd->obd_upcall.onu_upcall = cl_ocd_update;
 450
 451         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 452
 453         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 454                           NULL);
 455         if (err == -EBUSY) {
 456                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 457                                    "recovery, of which this client is not a "
 458                                    "part.  Please wait for recovery to "
 459                                    "complete, abort, or time out.\n", dt);
 460                 GOTO(out_md, err);
 461         } else if (err) {
 462                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 463                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 464                 GOTO(out_md, err);
 465         }
 466
 467         sbi->ll_dt_exp->exp_connect_data = *data;
 468
 469         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 470                            LUSTRE_SEQ_METADATA);
 471         if (err) {
 472                 CERROR("%s: Can't init data layer FID infrastructure, "
 473                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 474                 GOTO(out_dt, err);
 475         }
 476
 477         mutex_lock(&sbi->ll_lco.lco_lock);
 478         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 479         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 480         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 481         mutex_unlock(&sbi->ll_lco.lco_lock);
 482
 483         fid_zero(&sbi->ll_root_fid);
 484         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 485         if (err) {
 486                 CERROR("cannot mds_connect: rc = %d\n", err);
 487                 GOTO(out_lock_cn_cb, err);
 488         }
 489         if (!fid_is_sane(&sbi->ll_root_fid)) {
 490                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 491                        sbi->ll_md_exp->exp_obd->obd_name,
 492                        PFID(&sbi->ll_root_fid));
 493                 GOTO(out_lock_cn_cb, err = -EINVAL);
 494         }
 495         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 496
 497         sb->s_op = &lustre_super_operations;
 498 #if THREAD_SIZE >= 8192 /*b=17630*/
 499         sb->s_export_op = &lustre_export_operations;
 500 #endif
 501
 502         /* make root inode
 503          * XXX: move this to after cbd setup? */
 504         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA |
 505                 OBD_MD_FLMODEASIZE;
 506         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 507                 valid |= OBD_MD_FLRMTPERM;
 508         else if (sbi->ll_flags & LL_SBI_ACL)
 509                 valid |= OBD_MD_FLACL;
 510
 511         OBD_ALLOC_PTR(op_data);
 512         if (op_data == NULL)
 513                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 514
 515         op_data->op_fid1 = sbi->ll_root_fid;
 516         op_data->op_mode = 0;
 517         op_data->op_capa1 = oc;
 518         op_data->op_valid = valid;
 519
 520         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 521         if (oc)
 522                 capa_put(oc);
 523         OBD_FREE_PTR(op_data);
 524         if (err) {
 525                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 526                        sbi->ll_md_exp->exp_obd->obd_name, err);
 527                 GOTO(out_lock_cn_cb, err);
 528         }
 529
 530         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 531                                sbi->ll_md_exp, &lmd);
 532         if (err) {
 533                 CERROR("failed to understand root inode md: rc = %d\n", err);
 534                 ptlrpc_req_finished(request);
 535                 GOTO(out_lock_cn_cb, err);
 536         }
 537
 538         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 539         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 540                                             sbi->ll_flags & LL_SBI_32BIT_API),
 541                        &lmd);
 542         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 543         ptlrpc_req_finished(request);
 544
 545         if (IS_ERR(root)) {
 546                 if (lmd.lsm)
 547                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 548 #ifdef CONFIG_FS_POSIX_ACL
 549                 if (lmd.posix_acl) {
 550                         posix_acl_release(lmd.posix_acl);
 551                         lmd.posix_acl = NULL;
 552                 }
 553 #endif
 554                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 555                 root = NULL;
 556                 CERROR("lustre_lite: bad iget4 for root\n");
 557                 GOTO(out_root, err);
 558         }
 559
 560         err = ll_close_thread_start(&sbi->ll_lcq);
 561         if (err) {
 562                 CERROR("cannot start close thread: rc %d\n", err);
 563                 GOTO(out_root, err);
 564         }
 565
 566 #ifdef CONFIG_FS_POSIX_ACL
 567         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 568                 rct_init(&sbi->ll_rct);
 569                 et_init(&sbi->ll_et);
 570         }
 571 #endif
 572
 573         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 574         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 575                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 576                                  NULL);
 577         cl_sb_init(sb);
 578
 579         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 580                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 581                                  &sbi->ll_cache, NULL);
 582
 583         sb->s_root = d_make_root(root);
 584         if (sb->s_root == NULL) {
 585                 CERROR("%s: can't make root dentry\n",
 586                         ll_get_fsname(sb, NULL, 0));
 587                 GOTO(out_root, err = -ENOMEM);
 588         }
 589 #ifdef HAVE_DCACHE_LOCK
 590         sb->s_root->d_op = &ll_d_ops;
 591 #endif
 592
 593         sbi->ll_sdev_orig = sb->s_dev;
 594
 595         /* We set sb->s_dev equal on all lustre clients in order to support
 596          * NFS export clustering.  NFSD requires that the FSID be the same
 597          * on all clients. */
 598         /* s_dev is also used in lt_compare() to compare two fs, but that is
 599          * only a node-local comparison. */
 600         uuid = obd_get_uuid(sbi->ll_md_exp);
 601         if (uuid != NULL)
 602                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 603
 604         if (data != NULL)
 605                 OBD_FREE_PTR(data);
 606         if (osfs != NULL)
 607                 OBD_FREE_PTR(osfs);
 608         if (proc_lustre_fs_root != NULL) {
 609                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 610                                                   dt, md);
 611                 if (err < 0) {
 612                         CERROR("%s: could not register mount in lprocfs: "
 613                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 614                         err = 0;
 615                 }
 616         }
 617
 618         RETURN(err);
 619 out_root:
 620         if (root)
 621                 iput(root);
 622 out_lock_cn_cb:
 623         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 624 out_dt:
 625         obd_disconnect(sbi->ll_dt_exp);
 626         sbi->ll_dt_exp = NULL;
 627         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 628         obd_zombie_barrier();
 629 out_md_fid:
 630         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 631 out_md:
 632         obd_disconnect(sbi->ll_md_exp);
 633         sbi->ll_md_exp = NULL;
 634 out:
 635         if (data != NULL)
 636                 OBD_FREE_PTR(data);
 637         if (osfs != NULL)
 638                 OBD_FREE_PTR(osfs);
 639         return err;
 640 }
 641
 642 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 643 {
 644         int size, rc;
 645
 646         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 647         size = sizeof(int);
 648         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 649                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 650         if (rc)
 651                 CERROR("Get max mdsize error rc %d\n", rc);
 652
 653         RETURN(rc);
 654 }
 655
 656 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 657 {
 658         int size, rc;
 659
 660         size = sizeof(int);
 661         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 662                          KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 663         if (rc)
 664                 CERROR("Get default mdsize error rc %d\n", rc);
 665
 666         RETURN(rc);
 667 }
 668
 669 int ll_get_max_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 670 {
 671         int size, rc;
 672
 673         size = sizeof(int);
 674         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_COOKIESIZE),
 675                           KEY_MAX_COOKIESIZE, &size, lmmsize, NULL);
 676         if (rc)
 677                 CERROR("Get max cookiesize error rc %d\n", rc);
 678
 679         RETURN(rc);
 680 }
 681
 682 int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 683 {
 684         int size, rc;
 685
 686         size = sizeof(int);
 687         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_COOKIESIZE),
 688                           KEY_DEFAULT_COOKIESIZE, &size, lmmsize, NULL);
 689         if (rc)
 690                 CERROR("Get default cookiesize error rc %d\n", rc);
 691
 692         RETURN(rc);
 693 }
 694
 695 static void ll_dump_inode(struct inode *inode)
 696 {
 697         struct ll_d_hlist_node *tmp;
 698         int dentry_count = 0;
 699
 700         LASSERT(inode != NULL);
 701
 702         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 703                 dentry_count++;
 704
 705         CERROR("%s: inode %p dump: dev=%s fid="DFID
 706                " mode=%o count=%u, %d dentries\n",
 707                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 708                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 709                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 710 }
 711
 712 void lustre_dump_dentry(struct dentry *dentry, int recur)
 713 {
 714         struct list_head *tmp;
 715         int subdirs = 0;
 716
 717         LASSERT(dentry != NULL);
 718
 719         list_for_each(tmp, &dentry->d_subdirs)
 720                 subdirs++;
 721
 722         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 723                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 724                dentry->d_name.len, dentry->d_name.name,
 725                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 726                dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
 727                dentry->d_flags, dentry->d_fsdata, subdirs);
 728         if (dentry->d_inode != NULL)
 729                 ll_dump_inode(dentry->d_inode);
 730
 731         if (recur == 0)
 732                 return;
 733
 734         list_for_each(tmp, &dentry->d_subdirs) {
 735                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 736                 lustre_dump_dentry(d, recur - 1);
 737         }
 738 }
 739
 740 static void client_common_put_super(struct super_block *sb)
 741 {
 742         struct ll_sb_info *sbi = ll_s2sbi(sb);
 743         ENTRY;
 744
 745 #ifdef CONFIG_FS_POSIX_ACL
 746         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 747                 et_fini(&sbi->ll_et);
 748                 rct_fini(&sbi->ll_rct);
 749         }
 750 #endif
 751
 752         ll_close_thread_shutdown(sbi->ll_lcq);
 753
 754         cl_sb_fini(sb);
 755
 756         list_del(&sbi->ll_conn_chain);
 757
 758         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 759         obd_disconnect(sbi->ll_dt_exp);
 760         sbi->ll_dt_exp = NULL;
 761         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 762          * see LU-2543. */
 763         obd_zombie_barrier();
 764
 765         lprocfs_unregister_mountpoint(sbi);
 766
 767         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 768         obd_disconnect(sbi->ll_md_exp);
 769         sbi->ll_md_exp = NULL;
 770
 771         EXIT;
 772 }
 773
 774 void ll_kill_super(struct super_block *sb)
 775 {
 776         struct ll_sb_info *sbi;
 777         ENTRY;
 778
 779         /* not init sb ?*/
 780         if (!(sb->s_flags & MS_ACTIVE))
 781                 return;
 782
 783         sbi = ll_s2sbi(sb);
 784         /* we need restore s_dev from changed for clustred NFS before put_super
 785          * because new kernels have cached s_dev and change sb->s_dev in
 786          * put_super not affected real removing devices */
 787         if (sbi) {
 788                 sb->s_dev = sbi->ll_sdev_orig;
 789                 sbi->ll_umounting = 1;
 790
 791                 /* wait running statahead threads to quit */
 792                 while (atomic_read(&sbi->ll_sa_running) > 0)
 793                         schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
 794                                 msecs_to_jiffies(MSEC_PER_SEC >> 3));
 795         }
 796
 797         EXIT;
 798 }
 799
 800 static inline int ll_set_opt(const char *opt, char *data, int fl)
 801 {
 802         if (strncmp(opt, data, strlen(opt)) != 0)
 803                 return(0);
 804         else
 805                 return(fl);
 806 }
 807
 808 /* non-client-specific mount options are parsed in lmd_parse */
 809 static int ll_options(char *options, int *flags)
 810 {
 811         int tmp;
 812         char *s1 = options, *s2;
 813         ENTRY;
 814
 815         if (!options)
 816                 RETURN(0);
 817
 818         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 819
 820         while (*s1) {
 821                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 822                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 823                 if (tmp) {
 824                         *flags |= tmp;
 825                         goto next;
 826                 }
 827                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 828                 if (tmp) {
 829                         *flags |= tmp;
 830                         goto next;
 831                 }
 832                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 833                 if (tmp) {
 834                         *flags |= tmp;
 835                         goto next;
 836                 }
 837                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 838                 if (tmp) {
 839                         *flags &= ~tmp;
 840                         goto next;
 841                 }
 842                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 843                 if (tmp) {
 844                         *flags |= tmp;
 845                         goto next;
 846                 }
 847                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 848                 if (tmp) {
 849                         *flags &= ~tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 853                 if (tmp) {
 854                         *flags |= tmp;
 855                         goto next;
 856                 }
 857                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 858                 if (tmp) {
 859                         *flags |= tmp;
 860                         goto next;
 861                 }
 862                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 863                 if (tmp) {
 864                         *flags &= ~tmp;
 865                         goto next;
 866                 }
 867
 868                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 869                 if (tmp) {
 870                         *flags |= tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 874                 if (tmp) {
 875                         *flags &= ~tmp;
 876                         goto next;
 877                 }
 878                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 879                 if (tmp) {
 880                         *flags |= tmp;
 881                         goto next;
 882                 }
 883                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 884                 if (tmp) {
 885                         *flags &= ~tmp;
 886                         goto next;
 887                 }
 888                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 889                 if (tmp) {
 890                         *flags |= tmp;
 891                         goto next;
 892                 }
 893                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 894                 if (tmp) {
 895                         *flags &= ~tmp;
 896                         goto next;
 897                 }
 898                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 899                 if (tmp) {
 900                         *flags |= tmp;
 901                         goto next;
 902                 }
 903                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 904                 if (tmp) {
 905                         *flags |= tmp;
 906                         goto next;
 907                 }
 908                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 909                 if (tmp) {
 910                         *flags |= tmp;
 911                         goto next;
 912                 }
 913                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 914                 if (tmp) {
 915                         *flags &= ~tmp;
 916                         goto next;
 917                 }
 918                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 919                                    s1);
 920                 RETURN(-EINVAL);
 921
 922 next:
 923                 /* Find next opt */
 924                 s2 = strchr(s1, ',');
 925                 if (s2 == NULL)
 926                         break;
 927                 s1 = s2 + 1;
 928         }
 929         RETURN(0);
 930 }
 931
 932 void ll_lli_init(struct ll_inode_info *lli)
 933 {
 934         lli->lli_inode_magic = LLI_INODE_MAGIC;
 935         lli->lli_flags = 0;
 936         lli->lli_ioepoch = 0;
 937         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 938         spin_lock_init(&lli->lli_lock);
 939         lli->lli_posix_acl = NULL;
 940         lli->lli_remote_perms = NULL;
 941         mutex_init(&lli->lli_rmtperm_mutex);
 942         /* Do not set lli_fid, it has been initialized already. */
 943         fid_zero(&lli->lli_pfid);
 944         INIT_LIST_HEAD(&lli->lli_close_list);
 945         INIT_LIST_HEAD(&lli->lli_oss_capas);
 946         atomic_set(&lli->lli_open_count, 0);
 947         lli->lli_mds_capa = NULL;
 948         lli->lli_rmtperm_time = 0;
 949         lli->lli_pending_och = NULL;
 950         lli->lli_mds_read_och = NULL;
 951         lli->lli_mds_write_och = NULL;
 952         lli->lli_mds_exec_och = NULL;
 953         lli->lli_open_fd_read_count = 0;
 954         lli->lli_open_fd_write_count = 0;
 955         lli->lli_open_fd_exec_count = 0;
 956         mutex_init(&lli->lli_och_mutex);
 957         spin_lock_init(&lli->lli_agl_lock);
 958         lli->lli_has_smd = false;
 959         spin_lock_init(&lli->lli_layout_lock);
 960         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 961         lli->lli_clob = NULL;
 962
 963         init_rwsem(&lli->lli_xattrs_list_rwsem);
 964         mutex_init(&lli->lli_xattrs_enq_lock);
 965
 966         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 967         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 968                 mutex_init(&lli->lli_readdir_mutex);
 969                 lli->lli_opendir_key = NULL;
 970                 lli->lli_sai = NULL;
 971                 spin_lock_init(&lli->lli_sa_lock);
 972                 lli->lli_opendir_pid = 0;
 973                 lli->lli_sa_enabled = 0;
 974         } else {
 975                 mutex_init(&lli->lli_size_mutex);
 976                 lli->lli_symlink_name = NULL;
 977                 init_rwsem(&lli->lli_trunc_sem);
 978                 range_lock_tree_init(&lli->lli_write_tree);
 979                 init_rwsem(&lli->lli_glimpse_sem);
 980                 lli->lli_glimpse_time = 0;
 981                 INIT_LIST_HEAD(&lli->lli_agl_list);
 982                 lli->lli_agl_index = 0;
 983                 lli->lli_async_rc = 0;
 984         }
 985         mutex_init(&lli->lli_layout_mutex);
 986 }
 987
 988 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 989 {
 990         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 991
 992         bdi->name = "lustre";
 993         return bdi_register(bdi, NULL, "lustre-%d",
 994                             atomic_inc_return(&ll_bdi_num));
 995 }
 996
 997 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 998 {
 999         struct lustre_profile *lprof = NULL;
1000         struct lustre_sb_info *lsi = s2lsi(sb);
1001         struct ll_sb_info *sbi;
1002         char  *dt = NULL, *md = NULL;
1003         char  *profilenm = get_profile_name(sb);
1004         struct config_llog_instance *cfg;
1005         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1006         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1007         int    err;
1008         ENTRY;
1009
1010         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1011
1012         OBD_ALLOC_PTR(cfg);
1013         if (cfg == NULL)
1014                 RETURN(-ENOMEM);
1015
1016         try_module_get(THIS_MODULE);
1017
1018         /* client additional sb info */
1019         lsi->lsi_llsbi = sbi = ll_init_sbi();
1020         if (!sbi) {
1021                 module_put(THIS_MODULE);
1022                 OBD_FREE_PTR(cfg);
1023                 RETURN(-ENOMEM);
1024         }
1025
1026         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1027         if (err)
1028                 GOTO(out_free, err);
1029
1030         err = bdi_init(&lsi->lsi_bdi);
1031         if (err)
1032                 GOTO(out_free, err);
1033         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1034         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1035         err = ll_bdi_register(&lsi->lsi_bdi);
1036         if (err)
1037                 GOTO(out_free, err);
1038
1039         sb->s_bdi = &lsi->lsi_bdi;
1040 #ifndef HAVE_DCACHE_LOCK
1041         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1042         sb->s_d_op = &ll_d_ops;
1043 #endif
1044
1045         /* Generate a string unique to this super, in case some joker tries
1046            to mount the same fs at two mount points.
1047            Use the address of the super itself.*/
1048         cfg->cfg_instance = sb;
1049         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1050         cfg->cfg_callback = class_config_llog_handler;
1051         /* set up client obds */
1052         err = lustre_process_log(sb, profilenm, cfg);
1053         if (err < 0)
1054                 GOTO(out_free, err);
1055
1056         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1057         lprof = class_get_profile(profilenm);
1058         if (lprof == NULL) {
1059                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1060                                    " read from the MGS.  Does that filesystem "
1061                                    "exist?\n", profilenm);
1062                 GOTO(out_free, err = -EINVAL);
1063         }
1064         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1065                lprof->lp_md, lprof->lp_dt);
1066
1067         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1068         if (!dt)
1069                 GOTO(out_free, err = -ENOMEM);
1070         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1071
1072         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1073         if (!md)
1074                 GOTO(out_free, err = -ENOMEM);
1075         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1076
1077         /* connections, registrations, sb setup */
1078         err = client_common_fill_super(sb, md, dt, mnt);
1079
1080 out_free:
1081         if (md)
1082                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1083         if (dt)
1084                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1085         if (err)
1086                 ll_put_super(sb);
1087         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1088                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1089
1090         OBD_FREE_PTR(cfg);
1091         RETURN(err);
1092 } /* ll_fill_super */
1093
1094 void ll_put_super(struct super_block *sb)
1095 {
1096         struct config_llog_instance cfg, params_cfg;
1097         struct obd_device *obd;
1098         struct lustre_sb_info *lsi = s2lsi(sb);
1099         struct ll_sb_info *sbi = ll_s2sbi(sb);
1100         char *profilenm = get_profile_name(sb);
1101         long ccc_count;
1102         int next, force = 1, rc = 0;
1103         ENTRY;
1104
1105         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1106
1107         ll_print_capa_stat(sbi);
1108
1109         cfg.cfg_instance = sb;
1110         lustre_end_log(sb, profilenm, &cfg);
1111
1112         params_cfg.cfg_instance = sb;
1113         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1114
1115         if (sbi->ll_md_exp) {
1116                 obd = class_exp2obd(sbi->ll_md_exp);
1117                 if (obd)
1118                         force = obd->obd_force;
1119         }
1120
1121         /* Wait for unstable pages to be committed to stable storage */
1122         if (force == 0) {
1123                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1124                 rc = l_wait_event(sbi->ll_cache.ccc_unstable_waitq,
1125                         atomic_long_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
1126                         &lwi);
1127         }
1128
1129         ccc_count = atomic_long_read(&sbi->ll_cache.ccc_unstable_nr);
1130         if (force == 0 && rc != -EINTR)
1131                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1132
1133
1134         /* We need to set force before the lov_disconnect in
1135            lustre_common_put_super, since l_d cleans up osc's as well. */
1136         if (force) {
1137                 next = 0;
1138                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1139                                                      &next)) != NULL) {
1140                         obd->obd_force = force;
1141                 }
1142         }
1143
1144         if (sbi->ll_lcq) {
1145                 /* Only if client_common_fill_super succeeded */
1146                 client_common_put_super(sb);
1147         }
1148
1149         next = 0;
1150         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1151                 class_manual_cleanup(obd);
1152         }
1153
1154         if (sbi->ll_flags & LL_SBI_VERBOSE)
1155                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1156
1157         if (profilenm)
1158                 class_del_profile(profilenm);
1159
1160         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1161                 bdi_destroy(&lsi->lsi_bdi);
1162                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1163         }
1164
1165         ll_free_sbi(sb);
1166         lsi->lsi_llsbi = NULL;
1167
1168         lustre_common_put_super(sb);
1169
1170         cl_env_cache_purge(~0);
1171
1172         module_put(THIS_MODULE);
1173
1174         EXIT;
1175 } /* client_put_super */
1176
1177 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1178 {
1179         struct inode *inode = NULL;
1180
1181         /* NOTE: we depend on atomic igrab() -bzzz */
1182         lock_res_and_lock(lock);
1183         if (lock->l_resource->lr_lvb_inode) {
1184                 struct ll_inode_info * lli;
1185                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1186                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1187                         inode = igrab(lock->l_resource->lr_lvb_inode);
1188                 } else {
1189                         inode = lock->l_resource->lr_lvb_inode;
1190                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1191                                          D_WARNING, lock, "lr_lvb_inode %p is "
1192                                          "bogus: magic %08x",
1193                                          lock->l_resource->lr_lvb_inode,
1194                                          lli->lli_inode_magic);
1195                         inode = NULL;
1196                 }
1197         }
1198         unlock_res_and_lock(lock);
1199         return inode;
1200 }
1201
1202 static void ll_dir_clear_lsm_md(struct inode *inode)
1203 {
1204         struct ll_inode_info *lli = ll_i2info(inode);
1205
1206         LASSERT(S_ISDIR(inode->i_mode));
1207
1208         if (lli->lli_lsm_md != NULL) {
1209                 lmv_free_memmd(lli->lli_lsm_md);
1210                 lli->lli_lsm_md = NULL;
1211         }
1212 }
1213
1214 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1215                                       const struct lu_fid *fid,
1216                                       struct lustre_md *md)
1217 {
1218         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1219         struct mdt_body         *body = md->body;
1220         struct inode            *inode;
1221         ino_t                   ino;
1222         ENTRY;
1223
1224         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1225         inode = iget_locked(sb, ino);
1226         if (inode == NULL) {
1227                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1228                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1229                 RETURN(ERR_PTR(-ENOENT));
1230         }
1231
1232         if (inode->i_state & I_NEW) {
1233                 struct ll_inode_info *lli = ll_i2info(inode);
1234                 struct lmv_stripe_md *lsm = md->lmv;
1235
1236                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1237                                 (body->mbo_mode & S_IFMT);
1238                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1239                          PFID(fid));
1240
1241                 LTIME_S(inode->i_mtime) = 0;
1242                 LTIME_S(inode->i_atime) = 0;
1243                 LTIME_S(inode->i_ctime) = 0;
1244                 inode->i_rdev = 0;
1245
1246                 /* initializing backing dev info. */
1247                 inode->i_mapping->backing_dev_info =
1248                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1249                 inode->i_op = &ll_dir_inode_operations;
1250                 inode->i_fop = &ll_dir_operations;
1251                 lli->lli_fid = *fid;
1252                 ll_lli_init(lli);
1253
1254                 LASSERT(lsm != NULL);
1255                 /* master object FID */
1256                 lli->lli_pfid = body->mbo_fid1;
1257                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1258                        lli, PFID(fid), PFID(&lli->lli_pfid));
1259                 unlock_new_inode(inode);
1260         }
1261
1262         RETURN(inode);
1263 }
1264
1265 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1266 {
1267         struct lu_fid *fid;
1268         struct lmv_stripe_md *lsm = md->lmv;
1269         int i;
1270
1271         LASSERT(lsm != NULL);
1272         /* XXX sigh, this lsm_root initialization should be in
1273          * LMV layer, but it needs ll_iget right now, so we
1274          * put this here right now. */
1275         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1276                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1277                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1278                 /* Unfortunately ll_iget will call ll_update_inode,
1279                  * where the initialization of slave inode is slightly
1280                  * different, so it reset lsm_md to NULL to avoid
1281                  * initializing lsm for slave inode. */
1282                 /* For migrating inode, master stripe and master object will
1283                  * be same, so we only need assign this inode */
1284                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1285                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1286                 else
1287                         lsm->lsm_md_oinfo[i].lmo_root =
1288                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1289
1290                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1291                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1292
1293                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1294                         return rc;
1295                 }
1296         }
1297
1298         /* Here is where the lsm is being initialized(fill lmo_info) after
1299          * client retrieve MD stripe information from MDT. */
1300         return md_update_lsm_md(ll_i2mdexp(inode), lsm, md->body,
1301                                 ll_md_blocking_ast);
1302 }
1303
1304 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1305                                 const struct lmv_stripe_md *lsm_md2)
1306 {
1307         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1308                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1309                lsm_md1->lsm_md_master_mdt_index ==
1310                                         lsm_md2->lsm_md_master_mdt_index &&
1311                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1312                lsm_md1->lsm_md_layout_version ==
1313                                         lsm_md2->lsm_md_layout_version &&
1314                strcmp(lsm_md1->lsm_md_pool_name,
1315                       lsm_md2->lsm_md_pool_name) == 0;
1316 }
1317
1318 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1319 {
1320         struct ll_inode_info *lli = ll_i2info(inode);
1321         struct lmv_stripe_md *lsm = md->lmv;
1322         int     rc;
1323         ENTRY;
1324
1325         LASSERT(S_ISDIR(inode->i_mode));
1326         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1327                PFID(ll_inode2fid(inode)));
1328
1329         /* no striped information from request. */
1330         if (lsm == NULL) {
1331                 if (lli->lli_lsm_md == NULL) {
1332                         RETURN(0);
1333                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1334                                                 LMV_HASH_FLAG_MIGRATION) {
1335                         /* migration is done, the temporay MIGRATE layout has
1336                          * been removed */
1337                         CDEBUG(D_INODE, DFID" finish migration.\n",
1338                                PFID(ll_inode2fid(inode)));
1339                         lmv_free_memmd(lli->lli_lsm_md);
1340                         lli->lli_lsm_md = NULL;
1341                         RETURN(0);
1342                 } else {
1343                         /* The lustre_md from req does not include stripeEA,
1344                          * see ll_md_setattr */
1345                         RETURN(0);
1346                 }
1347         }
1348
1349         /* set the directory layout */
1350         if (lli->lli_lsm_md == NULL) {
1351
1352                 rc = ll_init_lsm_md(inode, md);
1353                 if (rc != 0)
1354                         RETURN(rc);
1355
1356                 lli->lli_lsm_md = lsm;
1357                 /* set lsm_md to NULL, so the following free lustre_md
1358                  * will not free this lsm */
1359                 md->lmv = NULL;
1360                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1361                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1362                 RETURN(0);
1363         }
1364
1365         /* Compare the old and new stripe information */
1366         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1367                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1368                 int                     idx;
1369
1370                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1371                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1372                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1373                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1374                        inode, lsm, old_lsm,
1375                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1376                        lsm->lsm_md_stripe_count,
1377                        old_lsm->lsm_md_stripe_count,
1378                        lsm->lsm_md_master_mdt_index,
1379                        old_lsm->lsm_md_master_mdt_index,
1380                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1381                        lsm->lsm_md_layout_version,
1382                        old_lsm->lsm_md_layout_version,
1383                        lsm->lsm_md_pool_name,
1384                        old_lsm->lsm_md_pool_name);
1385
1386                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1387                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1388                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1389                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1390                 }
1391
1392                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1393                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1394                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1395                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1396                 }
1397
1398                 RETURN(-EIO);
1399         }
1400
1401         rc = md_update_lsm_md(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
1402                               md->body, ll_md_blocking_ast);
1403
1404         RETURN(rc);
1405 }
1406
1407 void ll_clear_inode(struct inode *inode)
1408 {
1409         struct ll_inode_info *lli = ll_i2info(inode);
1410         struct ll_sb_info *sbi = ll_i2sbi(inode);
1411         ENTRY;
1412
1413         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1414                PFID(ll_inode2fid(inode)), inode);
1415
1416         if (S_ISDIR(inode->i_mode)) {
1417                 /* these should have been cleared in ll_file_release */
1418                 LASSERT(lli->lli_opendir_key == NULL);
1419                 LASSERT(lli->lli_sai == NULL);
1420                 LASSERT(lli->lli_opendir_pid == 0);
1421         }
1422
1423         spin_lock(&lli->lli_lock);
1424         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1425         spin_unlock(&lli->lli_lock);
1426         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1427
1428         LASSERT(!lli->lli_open_fd_write_count);
1429         LASSERT(!lli->lli_open_fd_read_count);
1430         LASSERT(!lli->lli_open_fd_exec_count);
1431
1432         if (lli->lli_mds_write_och)
1433                 ll_md_real_close(inode, FMODE_WRITE);
1434         if (lli->lli_mds_exec_och)
1435                 ll_md_real_close(inode, FMODE_EXEC);
1436         if (lli->lli_mds_read_och)
1437                 ll_md_real_close(inode, FMODE_READ);
1438
1439         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1440                 OBD_FREE(lli->lli_symlink_name,
1441                          strlen(lli->lli_symlink_name) + 1);
1442                 lli->lli_symlink_name = NULL;
1443         }
1444
1445         ll_xattr_cache_destroy(inode);
1446
1447         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1448                 LASSERT(lli->lli_posix_acl == NULL);
1449                 if (lli->lli_remote_perms) {
1450                         free_rmtperm_hash(lli->lli_remote_perms);
1451                         lli->lli_remote_perms = NULL;
1452                 }
1453         }
1454 #ifdef CONFIG_FS_POSIX_ACL
1455         else if (lli->lli_posix_acl) {
1456                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1457                 LASSERT(lli->lli_remote_perms == NULL);
1458                 posix_acl_release(lli->lli_posix_acl);
1459                 lli->lli_posix_acl = NULL;
1460         }
1461 #endif
1462         lli->lli_inode_magic = LLI_INODE_DEAD;
1463
1464         ll_clear_inode_capas(inode);
1465         if (S_ISDIR(inode->i_mode))
1466                 ll_dir_clear_lsm_md(inode);
1467         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1468                 LASSERT(list_empty(&lli->lli_agl_list));
1469
1470         /*
1471          * XXX This has to be done before lsm is freed below, because
1472          * cl_object still uses inode lsm.
1473          */
1474         cl_inode_fini(inode);
1475         lli->lli_has_smd = false;
1476
1477         EXIT;
1478 }
1479
1480 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1481                          struct md_open_data **mod)
1482 {
1483         struct lustre_md md;
1484         struct inode *inode = dentry->d_inode;
1485         struct ll_sb_info *sbi = ll_i2sbi(inode);
1486         struct ptlrpc_request *request = NULL;
1487         int rc, ia_valid;
1488         ENTRY;
1489
1490         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1491                                      LUSTRE_OPC_ANY, NULL);
1492         if (IS_ERR(op_data))
1493                 RETURN(PTR_ERR(op_data));
1494
1495         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1496                         &request, mod);
1497         if (rc) {
1498                 ptlrpc_req_finished(request);
1499                 if (rc == -ENOENT) {
1500                         clear_nlink(inode);
1501                         /* Unlinked special device node? Or just a race?
1502                          * Pretend we done everything. */
1503                         if (!S_ISREG(inode->i_mode) &&
1504                             !S_ISDIR(inode->i_mode)) {
1505                                 ia_valid = op_data->op_attr.ia_valid;
1506                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1507                                 rc = simple_setattr(dentry, &op_data->op_attr);
1508                                 op_data->op_attr.ia_valid = ia_valid;
1509                         }
1510                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1511                         CERROR("md_setattr fails: rc = %d\n", rc);
1512                 }
1513                 RETURN(rc);
1514         }
1515
1516         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1517                               sbi->ll_md_exp, &md);
1518         if (rc) {
1519                 ptlrpc_req_finished(request);
1520                 RETURN(rc);
1521         }
1522
1523         ia_valid = op_data->op_attr.ia_valid;
1524         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1525          * cache is not cleared yet. */
1526         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1527         rc = simple_setattr(dentry, &op_data->op_attr);
1528         op_data->op_attr.ia_valid = ia_valid;
1529
1530         /* Extract epoch data if obtained. */
1531         op_data->op_handle = md.body->mbo_handle;
1532         op_data->op_ioepoch = md.body->mbo_ioepoch;
1533
1534         rc = ll_update_inode(inode, &md);
1535         ptlrpc_req_finished(request);
1536
1537         RETURN(rc);
1538 }
1539
1540 /* Close IO epoch and send Size-on-MDS attribute update. */
1541 static int ll_setattr_done_writing(struct inode *inode,
1542                                    struct md_op_data *op_data,
1543                                    struct md_open_data *mod)
1544 {
1545         struct ll_inode_info *lli = ll_i2info(inode);
1546         int rc = 0;
1547         ENTRY;
1548
1549         LASSERT(op_data != NULL);
1550         if (!S_ISREG(inode->i_mode))
1551                 RETURN(0);
1552
1553         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1554                op_data->op_ioepoch, PFID(&lli->lli_fid));
1555
1556         op_data->op_flags = MF_EPOCH_CLOSE;
1557         ll_done_writing_attr(inode, op_data);
1558         ll_pack_inode2opdata(inode, op_data, NULL);
1559
1560         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1561         if (rc == -EAGAIN) {
1562                 /* MDS has instructed us to obtain Size-on-MDS attribute
1563                  * from OSTs and send setattr to back to MDS. */
1564                 rc = ll_som_update(inode, op_data);
1565         } else if (rc) {
1566                 CERROR("%s: inode "DFID" mdc truncate failed: rc = %d\n",
1567                        ll_i2sbi(inode)->ll_md_exp->exp_obd->obd_name,
1568                        PFID(ll_inode2fid(inode)), rc);
1569         }
1570         RETURN(rc);
1571 }
1572
1573 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1574 {
1575         struct obd_capa *capa;
1576         int rc;
1577
1578         if (attr->ia_valid & ATTR_SIZE)
1579                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1580         else
1581                 capa = ll_mdscapa_get(inode);
1582
1583         rc = cl_setattr_ost(inode, attr, capa);
1584
1585         if (attr->ia_valid & ATTR_SIZE)
1586                 ll_truncate_free_capa(capa);
1587         else
1588                 capa_put(capa);
1589
1590         return rc;
1591 }
1592
1593 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1594  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1595  * keep these values until such a time that objects are allocated for it.
1596  * We do the MDS operations first, as it is checking permissions for us.
1597  * We don't to the MDS RPC if there is nothing that we want to store there,
1598  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1599  * going to do an RPC anyways.
1600  *
1601  * If we are doing a truncate, we will send the mtime and ctime updates
1602  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1603  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1604  * at the same time.
1605  *
1606  * In case of HSMimport, we only set attr on MDS.
1607  */
1608 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1609 {
1610         struct inode *inode = dentry->d_inode;
1611         struct ll_inode_info *lli = ll_i2info(inode);
1612         struct md_op_data *op_data = NULL;
1613         struct md_open_data *mod = NULL;
1614         bool file_is_released = false;
1615         int rc = 0, rc1 = 0;
1616         ENTRY;
1617
1618         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1619                "valid %x, hsm_import %d\n",
1620                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1621                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1622                hsm_import);
1623
1624         if (attr->ia_valid & ATTR_SIZE) {
1625                 /* Check new size against VFS/VM file size limit and rlimit */
1626                 rc = inode_newsize_ok(inode, attr->ia_size);
1627                 if (rc)
1628                         RETURN(rc);
1629
1630                 /* The maximum Lustre file size is variable, based on the
1631                  * OST maximum object size and number of stripes.  This
1632                  * needs another check in addition to the VFS check above. */
1633                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1634                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1635                                PFID(&lli->lli_fid), attr->ia_size,
1636                                ll_file_maxbytes(inode));
1637                         RETURN(-EFBIG);
1638                 }
1639
1640                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1641         }
1642
1643         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1644         if (attr->ia_valid & TIMES_SET_FLAGS) {
1645                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1646                     !cfs_capable(CFS_CAP_FOWNER))
1647                         RETURN(-EPERM);
1648         }
1649
1650         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1651         if (attr->ia_valid & ATTR_CTIME) {
1652                 attr->ia_ctime = CFS_CURRENT_TIME;
1653                 attr->ia_valid |= ATTR_CTIME_SET;
1654         }
1655         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1656             (attr->ia_valid & ATTR_ATIME)) {
1657                 attr->ia_atime = CFS_CURRENT_TIME;
1658                 attr->ia_valid |= ATTR_ATIME_SET;
1659         }
1660         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1661             (attr->ia_valid & ATTR_MTIME)) {
1662                 attr->ia_mtime = CFS_CURRENT_TIME;
1663                 attr->ia_valid |= ATTR_MTIME_SET;
1664         }
1665
1666         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1667                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1668                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1669                        cfs_time_current_sec());
1670
1671         /* We always do an MDS RPC, even if we're only changing the size;
1672          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1673
1674         OBD_ALLOC_PTR(op_data);
1675         if (op_data == NULL)
1676                 RETURN(-ENOMEM);
1677
1678         if (!S_ISDIR(inode->i_mode)) {
1679                 if (attr->ia_valid & ATTR_SIZE)
1680                         inode_dio_write_done(inode);
1681                 mutex_unlock(&inode->i_mutex);
1682         }
1683
1684         /* truncate on a released file must failed with -ENODATA,
1685          * so size must not be set on MDS for released file
1686          * but other attributes must be set
1687          */
1688         if (S_ISREG(inode->i_mode)) {
1689                 struct lov_stripe_md *lsm;
1690                 __u32 gen;
1691
1692                 ll_layout_refresh(inode, &gen);
1693                 lsm = ccc_inode_lsm_get(inode);
1694                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1695                         file_is_released = true;
1696                 ccc_inode_lsm_put(inode, lsm);
1697
1698                 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1699                         if (file_is_released) {
1700                                 rc = ll_layout_restore(inode, 0, attr->ia_size);
1701                                 if (rc < 0)
1702                                         GOTO(out, rc);
1703
1704                                 file_is_released = false;
1705                                 ll_layout_refresh(inode, &gen);
1706                         }
1707
1708                         /* If we are changing file size, file content is
1709                          * modified, flag it. */
1710                         attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1711                         spin_lock(&lli->lli_lock);
1712                         lli->lli_flags |= LLIF_DATA_MODIFIED;
1713                         spin_unlock(&lli->lli_lock);
1714                         op_data->op_bias |= MDS_DATA_MODIFIED;
1715                 }
1716         }
1717
1718         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1719
1720         /* Open epoch for truncate. */
1721         if (exp_connect_som(ll_i2mdexp(inode)) && !hsm_import &&
1722             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1723                 op_data->op_flags = MF_EPOCH_OPEN;
1724
1725         rc = ll_md_setattr(dentry, op_data, &mod);
1726         if (rc)
1727                 GOTO(out, rc);
1728
1729         /* RPC to MDT is sent, cancel data modification flag */
1730         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1731                 spin_lock(&lli->lli_lock);
1732                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1733                 spin_unlock(&lli->lli_lock);
1734         }
1735
1736         ll_ioepoch_open(lli, op_data->op_ioepoch);
1737         if (!S_ISREG(inode->i_mode) || file_is_released)
1738                 GOTO(out, rc = 0);
1739
1740         if (attr->ia_valid & (ATTR_SIZE |
1741                               ATTR_ATIME | ATTR_ATIME_SET |
1742                               ATTR_MTIME | ATTR_MTIME_SET)) {
1743                 /* For truncate and utimes sending attributes to OSTs, setting
1744                  * mtime/atime to the past will be performed under PW [0:EOF]
1745                  * extent lock (new_size:EOF for truncate).  It may seem
1746                  * excessive to send mtime/atime updates to OSTs when not
1747                  * setting times to past, but it is necessary due to possible
1748                  * time de-synchronization between MDT inode and OST objects */
1749                 if (attr->ia_valid & ATTR_SIZE)
1750                         down_write(&lli->lli_trunc_sem);
1751                 rc = ll_setattr_ost(inode, attr);
1752                 if (attr->ia_valid & ATTR_SIZE)
1753                         up_write(&lli->lli_trunc_sem);
1754         }
1755         EXIT;
1756 out:
1757         if (op_data) {
1758                 if (op_data->op_ioepoch) {
1759                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1760                         if (!rc)
1761                                 rc = rc1;
1762                 }
1763                 ll_finish_md_op_data(op_data);
1764         }
1765         if (!S_ISDIR(inode->i_mode)) {
1766                 mutex_lock(&inode->i_mutex);
1767                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1768                         inode_dio_wait(inode);
1769         }
1770
1771         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1772                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1773
1774         return rc;
1775 }
1776
1777 int ll_setattr(struct dentry *de, struct iattr *attr)
1778 {
1779         int mode = de->d_inode->i_mode;
1780
1781         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1782                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1783                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1784
1785         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1786                                (ATTR_SIZE|ATTR_MODE)) &&
1787             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1788              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1789               !(attr->ia_mode & S_ISGID))))
1790                 attr->ia_valid |= ATTR_FORCE;
1791
1792         if ((attr->ia_valid & ATTR_MODE) &&
1793             (mode & S_ISUID) &&
1794             !(attr->ia_mode & S_ISUID) &&
1795             !(attr->ia_valid & ATTR_KILL_SUID))
1796                 attr->ia_valid |= ATTR_KILL_SUID;
1797
1798         if ((attr->ia_valid & ATTR_MODE) &&
1799             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1800             !(attr->ia_mode & S_ISGID) &&
1801             !(attr->ia_valid & ATTR_KILL_SGID))
1802                 attr->ia_valid |= ATTR_KILL_SGID;
1803
1804         return ll_setattr_raw(de, attr, false);
1805 }
1806
1807 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1808                        __u64 max_age, __u32 flags)
1809 {
1810         struct ll_sb_info *sbi = ll_s2sbi(sb);
1811         struct obd_statfs obd_osfs;
1812         int rc;
1813         ENTRY;
1814
1815         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1816         if (rc) {
1817                 CERROR("md_statfs fails: rc = %d\n", rc);
1818                 RETURN(rc);
1819         }
1820
1821         osfs->os_type = sb->s_magic;
1822
1823         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1824                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1825
1826         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1827                 flags |= OBD_STATFS_NODELAY;
1828
1829         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1830         if (rc) {
1831                 CERROR("obd_statfs fails: rc = %d\n", rc);
1832                 RETURN(rc);
1833         }
1834
1835         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1836                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1837                obd_osfs.os_files);
1838
1839         osfs->os_bsize = obd_osfs.os_bsize;
1840         osfs->os_blocks = obd_osfs.os_blocks;
1841         osfs->os_bfree = obd_osfs.os_bfree;
1842         osfs->os_bavail = obd_osfs.os_bavail;
1843
1844         /* If we don't have as many objects free on the OST as inodes
1845          * on the MDS, we reduce the total number of inodes to
1846          * compensate, so that the "inodes in use" number is correct.
1847          */
1848         if (obd_osfs.os_ffree < osfs->os_ffree) {
1849                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1850                         obd_osfs.os_ffree;
1851                 osfs->os_ffree = obd_osfs.os_ffree;
1852         }
1853
1854         RETURN(rc);
1855 }
1856 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1857 {
1858         struct super_block *sb = de->d_sb;
1859         struct obd_statfs osfs;
1860         __u64 fsid = huge_encode_dev(sb->s_dev);
1861         int rc;
1862
1863         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1864         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1865
1866         /* Some amount of caching on the client is allowed */
1867         rc = ll_statfs_internal(sb, &osfs,
1868                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1869                                 0);
1870         if (rc)
1871                 return rc;
1872
1873         statfs_unpack(sfs, &osfs);
1874
1875         /* We need to downshift for all 32-bit kernels, because we can't
1876          * tell if the kernel is being called via sys_statfs64() or not.
1877          * Stop before overflowing f_bsize - in which case it is better
1878          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1879         if (sizeof(long) < 8) {
1880                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1881                         sfs->f_bsize <<= 1;
1882
1883                         osfs.os_blocks >>= 1;
1884                         osfs.os_bfree >>= 1;
1885                         osfs.os_bavail >>= 1;
1886                 }
1887         }
1888
1889         sfs->f_blocks = osfs.os_blocks;
1890         sfs->f_bfree = osfs.os_bfree;
1891         sfs->f_bavail = osfs.os_bavail;
1892         sfs->f_fsid.val[0] = (__u32)fsid;
1893         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1894         return 0;
1895 }
1896
1897 void ll_inode_size_lock(struct inode *inode)
1898 {
1899         struct ll_inode_info *lli;
1900
1901         LASSERT(!S_ISDIR(inode->i_mode));
1902
1903         lli = ll_i2info(inode);
1904         mutex_lock(&lli->lli_size_mutex);
1905 }
1906
1907 void ll_inode_size_unlock(struct inode *inode)
1908 {
1909         struct ll_inode_info *lli;
1910
1911         lli = ll_i2info(inode);
1912         mutex_unlock(&lli->lli_size_mutex);
1913 }
1914
1915 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1916 {
1917         struct ll_inode_info *lli = ll_i2info(inode);
1918         struct mdt_body *body = md->body;
1919         struct lov_stripe_md *lsm = md->lsm;
1920         struct ll_sb_info *sbi = ll_i2sbi(inode);
1921
1922         LASSERT((lsm != NULL) == ((body->mbo_valid & OBD_MD_FLEASIZE) != 0));
1923         if (lsm != NULL) {
1924                 if (!lli->lli_has_smd &&
1925                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1926                         cl_file_inode_init(inode, md);
1927
1928                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1929                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1930                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1931         }
1932
1933         if (S_ISDIR(inode->i_mode)) {
1934                 int     rc;
1935
1936                 rc = ll_update_lsm_md(inode, md);
1937                 if (rc != 0)
1938                         return rc;
1939         }
1940
1941         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1942                 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1943                         ll_update_remote_perm(inode, md->remote_perm);
1944         }
1945 #ifdef CONFIG_FS_POSIX_ACL
1946         else if (body->mbo_valid & OBD_MD_FLACL) {
1947                 spin_lock(&lli->lli_lock);
1948                 if (lli->lli_posix_acl)
1949                         posix_acl_release(lli->lli_posix_acl);
1950                 lli->lli_posix_acl = md->posix_acl;
1951                 spin_unlock(&lli->lli_lock);
1952         }
1953 #endif
1954         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1955                                         sbi->ll_flags & LL_SBI_32BIT_API);
1956         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1957
1958         if (body->mbo_valid & OBD_MD_FLATIME) {
1959                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1960                         LTIME_S(inode->i_atime) = body->mbo_atime;
1961                 lli->lli_atime = body->mbo_atime;
1962         }
1963
1964         if (body->mbo_valid & OBD_MD_FLMTIME) {
1965                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1966                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1967                                "to "LPU64"\n", inode->i_ino,
1968                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1969                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1970                 }
1971                 lli->lli_mtime = body->mbo_mtime;
1972         }
1973
1974         if (body->mbo_valid & OBD_MD_FLCTIME) {
1975                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1976                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1977                 lli->lli_ctime = body->mbo_ctime;
1978         }
1979
1980         if (body->mbo_valid & OBD_MD_FLMODE)
1981                 inode->i_mode = (inode->i_mode & S_IFMT) |
1982                                 (body->mbo_mode & ~S_IFMT);
1983
1984         if (body->mbo_valid & OBD_MD_FLTYPE)
1985                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1986                                 (body->mbo_mode & S_IFMT);
1987
1988         LASSERT(inode->i_mode != 0);
1989         if (S_ISREG(inode->i_mode))
1990                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1991                                        LL_MAX_BLKSIZE_BITS);
1992         else
1993                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1994
1995         if (body->mbo_valid & OBD_MD_FLUID)
1996                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1997         if (body->mbo_valid & OBD_MD_FLGID)
1998                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1999         if (body->mbo_valid & OBD_MD_FLFLAGS)
2000                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
2001         if (body->mbo_valid & OBD_MD_FLNLINK)
2002                 set_nlink(inode, body->mbo_nlink);
2003         if (body->mbo_valid & OBD_MD_FLRDEV)
2004                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2005
2006         if (body->mbo_valid & OBD_MD_FLID) {
2007                 /* FID shouldn't be changed! */
2008                 if (fid_is_sane(&lli->lli_fid)) {
2009                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2010                                  "Trying to change FID "DFID
2011                                  " to the "DFID", inode "DFID"(%p)\n",
2012                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2013                                  PFID(ll_inode2fid(inode)), inode);
2014                 } else {
2015                         lli->lli_fid = body->mbo_fid1;
2016                 }
2017         }
2018
2019         LASSERT(fid_seq(&lli->lli_fid) != 0);
2020
2021         if (body->mbo_valid & OBD_MD_FLSIZE) {
2022                 if (exp_connect_som(ll_i2mdexp(inode)) &&
2023                     S_ISREG(inode->i_mode)) {
2024                         struct lustre_handle lockh;
2025                         ldlm_mode_t mode;
2026
2027                         /* As it is possible a blocking ast has been processed
2028                          * by this time, we need to check there is an UPDATE
2029                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
2030                          * it. */
2031                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
2032                                                &lockh, LDLM_FL_CBPENDING,
2033                                                LCK_CR | LCK_CW |
2034                                                LCK_PR | LCK_PW);
2035                         if (mode) {
2036                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
2037                                                       LLIF_EPOCH_PENDING |
2038                                                       LLIF_SOM_DIRTY)) {
2039                                         CERROR("%s: inode "DFID" flags %u still"
2040                                                " has size authority! do not "
2041                                                "trust the size from MDS\n",
2042                                                sbi->ll_md_exp->exp_obd->obd_name,
2043                                                PFID(ll_inode2fid(inode)),
2044                                                lli->lli_flags);
2045                                 } else {
2046                                         /* Use old size assignment to avoid
2047                                          * deadlock bz14138 & bz14326 */
2048                                         i_size_write(inode, body->mbo_size);
2049                                         spin_lock(&lli->lli_lock);
2050                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
2051                                         spin_unlock(&lli->lli_lock);
2052                                 }
2053                                 ldlm_lock_decref(&lockh, mode);
2054                         }
2055                 } else {
2056                         /* Use old size assignment to avoid
2057                          * deadlock bz14138 & bz14326 */
2058                         i_size_write(inode, body->mbo_size);
2059
2060                         CDEBUG(D_VFSTRACE,
2061                                "inode="DFID", updating i_size %llu\n",
2062                                PFID(ll_inode2fid(inode)),
2063                                (unsigned long long)body->mbo_size);
2064                 }
2065
2066                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2067                         inode->i_blocks = body->mbo_blocks;
2068         }
2069
2070         if (body->mbo_valid & OBD_MD_FLMDSCAPA) {
2071                 LASSERT(md->mds_capa);
2072                 ll_add_capa(inode, md->mds_capa);
2073         }
2074
2075         if (body->mbo_valid & OBD_MD_FLOSSCAPA) {
2076                 LASSERT(md->oss_capa);
2077                 ll_add_capa(inode, md->oss_capa);
2078         }
2079
2080         if (body->mbo_valid & OBD_MD_TSTATE) {
2081                 if (body->mbo_t_state & MS_RESTORE)
2082                         lli->lli_flags |= LLIF_FILE_RESTORING;
2083         }
2084
2085         return 0;
2086 }
2087
2088 int ll_read_inode2(struct inode *inode, void *opaque)
2089 {
2090         struct lustre_md *md = opaque;
2091         struct ll_inode_info *lli = ll_i2info(inode);
2092         int     rc;
2093         ENTRY;
2094
2095         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2096                PFID(&lli->lli_fid), inode);
2097
2098         LASSERT(!lli->lli_has_smd);
2099
2100         /* Core attributes from the MDS first.  This is a new inode, and
2101          * the VFS doesn't zero times in the core inode so we have to do
2102          * it ourselves.  They will be overwritten by either MDS or OST
2103          * attributes - we just need to make sure they aren't newer. */
2104         LTIME_S(inode->i_mtime) = 0;
2105         LTIME_S(inode->i_atime) = 0;
2106         LTIME_S(inode->i_ctime) = 0;
2107         inode->i_rdev = 0;
2108         rc = ll_update_inode(inode, md);
2109         if (rc != 0)
2110                 RETURN(rc);
2111
2112         /* OIDEBUG(inode); */
2113
2114         /* initializing backing dev info. */
2115         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2116
2117
2118         if (S_ISREG(inode->i_mode)) {
2119                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2120                 inode->i_op = &ll_file_inode_operations;
2121                 inode->i_fop = sbi->ll_fop;
2122                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2123                 EXIT;
2124         } else if (S_ISDIR(inode->i_mode)) {
2125                 inode->i_op = &ll_dir_inode_operations;
2126                 inode->i_fop = &ll_dir_operations;
2127                 EXIT;
2128         } else if (S_ISLNK(inode->i_mode)) {
2129                 inode->i_op = &ll_fast_symlink_inode_operations;
2130                 EXIT;
2131         } else {
2132                 inode->i_op = &ll_special_inode_operations;
2133
2134                 init_special_inode(inode, inode->i_mode,
2135                                    inode->i_rdev);
2136
2137                 EXIT;
2138         }
2139
2140         return 0;
2141 }
2142
2143 void ll_delete_inode(struct inode *inode)
2144 {
2145         struct ll_inode_info *lli = ll_i2info(inode);
2146         ENTRY;
2147
2148         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2149                 /* It is last chance to write out dirty pages,
2150                  * otherwise we may lose data while umount */
2151                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2152
2153         truncate_inode_pages_final(&inode->i_data);
2154
2155         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2156                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2157                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2158
2159 #ifdef HAVE_SBOPS_EVICT_INODE
2160         ll_clear_inode(inode);
2161 #endif
2162         clear_inode(inode);
2163
2164         EXIT;
2165 }
2166
2167 int ll_iocontrol(struct inode *inode, struct file *file,
2168                  unsigned int cmd, unsigned long arg)
2169 {
2170         struct ll_sb_info *sbi = ll_i2sbi(inode);
2171         struct ptlrpc_request *req = NULL;
2172         int rc, flags = 0;
2173         ENTRY;
2174
2175         switch(cmd) {
2176         case FSFILT_IOC_GETFLAGS: {
2177                 struct mdt_body *body;
2178                 struct md_op_data *op_data;
2179
2180                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2181                                              0, 0, LUSTRE_OPC_ANY,
2182                                              NULL);
2183                 if (IS_ERR(op_data))
2184                         RETURN(PTR_ERR(op_data));
2185
2186                 op_data->op_valid = OBD_MD_FLFLAGS;
2187                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2188                 ll_finish_md_op_data(op_data);
2189                 if (rc) {
2190                         CERROR("%s: failure inode "DFID": rc = %d\n",
2191                                sbi->ll_md_exp->exp_obd->obd_name,
2192                                PFID(ll_inode2fid(inode)), rc);
2193                         RETURN(-abs(rc));
2194                 }
2195
2196                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2197
2198                 flags = body->mbo_flags;
2199
2200                 ptlrpc_req_finished(req);
2201
2202                 RETURN(put_user(flags, (int __user *)arg));
2203         }
2204         case FSFILT_IOC_SETFLAGS: {
2205                 struct lov_stripe_md *lsm;
2206                 struct obd_info oinfo = { { { 0 } } };
2207                 struct md_op_data *op_data;
2208
2209                 if (get_user(flags, (int __user *)arg))
2210                         RETURN(-EFAULT);
2211
2212                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2213                                              LUSTRE_OPC_ANY, NULL);
2214                 if (IS_ERR(op_data))
2215                         RETURN(PTR_ERR(op_data));
2216
2217                 op_data->op_attr_flags = flags;
2218                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2219                 rc = md_setattr(sbi->ll_md_exp, op_data,
2220                                 NULL, 0, NULL, 0, &req, NULL);
2221                 ll_finish_md_op_data(op_data);
2222                 ptlrpc_req_finished(req);
2223                 if (rc)
2224                         RETURN(rc);
2225
2226                 inode->i_flags = ll_ext_to_inode_flags(flags);
2227
2228                 lsm = ccc_inode_lsm_get(inode);
2229                 if (!lsm_has_objects(lsm)) {
2230                         ccc_inode_lsm_put(inode, lsm);
2231                         RETURN(0);
2232                 }
2233
2234                 OBDO_ALLOC(oinfo.oi_oa);
2235                 if (!oinfo.oi_oa) {
2236                         ccc_inode_lsm_put(inode, lsm);
2237                         RETURN(-ENOMEM);
2238                 }
2239                 oinfo.oi_md = lsm;
2240                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2241                 oinfo.oi_oa->o_flags = flags;
2242                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2243                                        OBD_MD_FLGROUP;
2244                 oinfo.oi_capa = ll_mdscapa_get(inode);
2245                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2246                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2247                 capa_put(oinfo.oi_capa);
2248                 OBDO_FREE(oinfo.oi_oa);
2249                 ccc_inode_lsm_put(inode, lsm);
2250
2251                 if (rc && rc != -EPERM && rc != -EACCES)
2252                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2253
2254                 RETURN(rc);
2255         }
2256         default:
2257                 RETURN(-ENOSYS);
2258         }
2259
2260         RETURN(0);
2261 }
2262
2263 int ll_flush_ctx(struct inode *inode)
2264 {
2265         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2266
2267         CDEBUG(D_SEC, "flush context for user %d\n",
2268                from_kuid(&init_user_ns, current_uid()));
2269
2270         obd_set_info_async(NULL, sbi->ll_md_exp,
2271                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2272                            0, NULL, NULL);
2273         obd_set_info_async(NULL, sbi->ll_dt_exp,
2274                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2275                            0, NULL, NULL);
2276         return 0;
2277 }
2278
2279 /* umount -f client means force down, don't save state */
2280 void ll_umount_begin(struct super_block *sb)
2281 {
2282         struct ll_sb_info *sbi = ll_s2sbi(sb);
2283         struct obd_device *obd;
2284         struct obd_ioctl_data *ioc_data;
2285         ENTRY;
2286
2287         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2288                sb->s_count, atomic_read(&sb->s_active));
2289
2290         obd = class_exp2obd(sbi->ll_md_exp);
2291         if (obd == NULL) {
2292                 CERROR("Invalid MDC connection handle "LPX64"\n",
2293                        sbi->ll_md_exp->exp_handle.h_cookie);
2294                 EXIT;
2295                 return;
2296         }
2297         obd->obd_force = 1;
2298
2299         obd = class_exp2obd(sbi->ll_dt_exp);
2300         if (obd == NULL) {
2301                 CERROR("Invalid LOV connection handle "LPX64"\n",
2302                        sbi->ll_dt_exp->exp_handle.h_cookie);
2303                 EXIT;
2304                 return;
2305         }
2306         obd->obd_force = 1;
2307
2308         OBD_ALLOC_PTR(ioc_data);
2309         if (ioc_data) {
2310                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2311                               sizeof *ioc_data, ioc_data, NULL);
2312
2313                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2314                               sizeof *ioc_data, ioc_data, NULL);
2315
2316                 OBD_FREE_PTR(ioc_data);
2317         }
2318
2319         /* Really, we'd like to wait until there are no requests outstanding,
2320          * and then continue.  For now, we just invalidate the requests,
2321          * schedule() and sleep one second if needed, and hope.
2322          */
2323         schedule();
2324         EXIT;
2325 }
2326
2327 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2328 {
2329         struct ll_sb_info *sbi = ll_s2sbi(sb);
2330         char *profilenm = get_profile_name(sb);
2331         int err;
2332         __u32 read_only;
2333
2334         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2335                 read_only = *flags & MS_RDONLY;
2336                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2337                                          sizeof(KEY_READ_ONLY),
2338                                          KEY_READ_ONLY, sizeof(read_only),
2339                                          &read_only, NULL);
2340                 if (err) {
2341                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2342                                       profilenm, read_only ?
2343                                       "read-only" : "read-write", err);
2344                         return err;
2345                 }
2346
2347                 if (read_only)
2348                         sb->s_flags |= MS_RDONLY;
2349                 else
2350                         sb->s_flags &= ~MS_RDONLY;
2351
2352                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2353                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2354                                       read_only ?  "read-only" : "read-write");
2355         }
2356         return 0;
2357 }
2358
2359 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2360                   struct super_block *sb, struct lookup_intent *it)
2361 {
2362         struct ll_sb_info *sbi = NULL;
2363         struct lustre_md md = { 0 };
2364         int rc;
2365         ENTRY;
2366
2367         LASSERT(*inode || sb);
2368         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2369         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2370                               sbi->ll_md_exp, &md);
2371         if (rc)
2372                 RETURN(rc);
2373
2374         if (*inode) {
2375                 rc = ll_update_inode(*inode, &md);
2376                 if (rc != 0)
2377                         GOTO(out, rc);
2378         } else {
2379                 LASSERT(sb != NULL);
2380
2381                 /*
2382                  * At this point server returns to client's same fid as client
2383                  * generated for creating. So using ->fid1 is okay here.
2384                  */
2385                 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2386
2387                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2388                                              sbi->ll_flags & LL_SBI_32BIT_API),
2389                                  &md);
2390                 if (IS_ERR(*inode)) {
2391 #ifdef CONFIG_FS_POSIX_ACL
2392                         if (md.posix_acl) {
2393                                 posix_acl_release(md.posix_acl);
2394                                 md.posix_acl = NULL;
2395                         }
2396 #endif
2397                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2398                         *inode = NULL;
2399                         CERROR("new_inode -fatal: rc %d\n", rc);
2400                         GOTO(out, rc);
2401                 }
2402         }
2403
2404         /* Handling piggyback layout lock.
2405          * Layout lock can be piggybacked by getattr and open request.
2406          * The lsm can be applied to inode only if it comes with a layout lock
2407          * otherwise correct layout may be overwritten, for example:
2408          * 1. proc1: mdt returns a lsm but not granting layout
2409          * 2. layout was changed by another client
2410          * 3. proc2: refresh layout and layout lock granted
2411          * 4. proc1: to apply a stale layout */
2412         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2413                 struct lustre_handle lockh;
2414                 struct ldlm_lock *lock;
2415
2416                 lockh.cookie = it->d.lustre.it_lock_handle;
2417                 lock = ldlm_handle2lock(&lockh);
2418                 LASSERT(lock != NULL);
2419                 if (ldlm_has_layout(lock)) {
2420                         struct cl_object_conf conf;
2421
2422                         memset(&conf, 0, sizeof(conf));
2423                         conf.coc_opc = OBJECT_CONF_SET;
2424                         conf.coc_inode = *inode;
2425                         conf.coc_lock = lock;
2426                         conf.u.coc_md = &md;
2427                         (void)ll_layout_conf(*inode, &conf);
2428                 }
2429                 LDLM_LOCK_PUT(lock);
2430         }
2431
2432 out:
2433         if (md.lsm != NULL)
2434                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2435         md_free_lustre_md(sbi->ll_md_exp, &md);
2436         RETURN(rc);
2437 }
2438
2439 int ll_obd_statfs(struct inode *inode, void __user *arg)
2440 {
2441         struct ll_sb_info *sbi = NULL;
2442         struct obd_export *exp;
2443         char *buf = NULL;
2444         struct obd_ioctl_data *data = NULL;
2445         __u32 type;
2446         __u32 __user flags;     /* not user, but obd_iocontrol is abused */
2447         int len = 0, rc;
2448
2449         if (!inode || !(sbi = ll_i2sbi(inode)))
2450                 GOTO(out_statfs, rc = -EINVAL);
2451
2452         rc = obd_ioctl_getdata(&buf, &len, arg);
2453         if (rc)
2454                 GOTO(out_statfs, rc);
2455
2456         data = (void*)buf;
2457         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2458             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2459                 GOTO(out_statfs, rc = -EINVAL);
2460
2461         if (data->ioc_inllen1 != sizeof(__u32) ||
2462             data->ioc_inllen2 != sizeof(__u32) ||
2463             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2464             data->ioc_plen2 != sizeof(struct obd_uuid))
2465                 GOTO(out_statfs, rc = -EINVAL);
2466
2467         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2468         if (type & LL_STATFS_LMV)
2469                 exp = sbi->ll_md_exp;
2470         else if (type & LL_STATFS_LOV)
2471                 exp = sbi->ll_dt_exp;
2472         else
2473                 GOTO(out_statfs, rc = -ENODEV);
2474
2475         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2476         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2477         if (rc)
2478                 GOTO(out_statfs, rc);
2479 out_statfs:
2480         if (buf)
2481                 obd_ioctl_freedata(buf, len);
2482         return rc;
2483 }
2484
2485 int ll_process_config(struct lustre_cfg *lcfg)
2486 {
2487         struct super_block *sb;
2488         unsigned long x;
2489         int rc = 0;
2490         char *ptr;
2491
2492         /* The instance name contains the sb: lustre-client-aacfe000 */
2493         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2494         if (!ptr || !*(++ptr))
2495                 return -EINVAL;
2496         if (sscanf(ptr, "%lx", &x) != 1)
2497                 return -EINVAL;
2498         sb = (struct super_block *)x;
2499         /* This better be a real Lustre superblock! */
2500         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2501
2502         /* Note we have not called client_common_fill_super yet, so
2503            proc fns must be able to handle that! */
2504         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2505                                       lcfg, sb);
2506         if (rc > 0)
2507                 rc = 0;
2508         return rc;
2509 }
2510
2511 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2512 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2513                                        struct inode *i1, struct inode *i2,
2514                                        const char *name, size_t namelen,
2515                                        __u32 mode, __u32 opc, void *data)
2516 {
2517         LASSERT(i1 != NULL);
2518
2519         if (name == NULL) {
2520                 /* Do not reuse namelen for something else. */
2521                 if (namelen != 0)
2522                         return ERR_PTR(-EINVAL);
2523         } else {
2524                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2525                         return ERR_PTR(-ENAMETOOLONG);
2526
2527                 if (!lu_name_is_valid_2(name, namelen))
2528                         return ERR_PTR(-EINVAL);
2529         }
2530
2531         if (op_data == NULL)
2532                 OBD_ALLOC_PTR(op_data);
2533
2534         if (op_data == NULL)
2535                 return ERR_PTR(-ENOMEM);
2536
2537         ll_i2gids(op_data->op_suppgids, i1, i2);
2538         op_data->op_fid1 = *ll_inode2fid(i1);
2539         op_data->op_capa1 = ll_mdscapa_get(i1);
2540         if (S_ISDIR(i1->i_mode))
2541                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2542
2543         if (i2) {
2544                 op_data->op_fid2 = *ll_inode2fid(i2);
2545                 op_data->op_capa2 = ll_mdscapa_get(i2);
2546                 if (S_ISDIR(i2->i_mode))
2547                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2548         } else {
2549                 fid_zero(&op_data->op_fid2);
2550                 op_data->op_capa2 = NULL;
2551         }
2552
2553         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2554                 op_data->op_cli_flags |= CLI_HASH64;
2555
2556         if (ll_need_32bit_api(ll_i2sbi(i1)))
2557                 op_data->op_cli_flags |= CLI_API32;
2558
2559         op_data->op_name = name;
2560         op_data->op_namelen = namelen;
2561         op_data->op_mode = mode;
2562         op_data->op_mod_time = cfs_time_current_sec();
2563         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2564         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2565         op_data->op_cap = cfs_curproc_cap_pack();
2566         op_data->op_bias = 0;
2567         op_data->op_cli_flags = 0;
2568         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2569              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2570                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2571         } else {
2572                 op_data->op_mds = 0;
2573         }
2574         op_data->op_data = data;
2575
2576         /* When called by ll_setattr_raw, file is i1. */
2577         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2578                 op_data->op_bias |= MDS_DATA_MODIFIED;
2579
2580         return op_data;
2581 }
2582
2583 void ll_finish_md_op_data(struct md_op_data *op_data)
2584 {
2585         capa_put(op_data->op_capa1);
2586         capa_put(op_data->op_capa2);
2587         OBD_FREE_PTR(op_data);
2588 }
2589
2590 #ifdef HAVE_SUPEROPS_USE_DENTRY
2591 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2592 #else
2593 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2594 #endif
2595 {
2596         struct ll_sb_info *sbi;
2597
2598 #ifdef HAVE_SUPEROPS_USE_DENTRY
2599         LASSERT((seq != NULL) && (dentry != NULL));
2600         sbi = ll_s2sbi(dentry->d_sb);
2601 #else
2602         LASSERT((seq != NULL) && (vfs != NULL));
2603         sbi = ll_s2sbi(vfs->mnt_sb);
2604 #endif
2605
2606         if (sbi->ll_flags & LL_SBI_NOLCK)
2607                 seq_puts(seq, ",nolock");
2608
2609         if (sbi->ll_flags & LL_SBI_FLOCK)
2610                 seq_puts(seq, ",flock");
2611
2612         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2613                 seq_puts(seq, ",localflock");
2614
2615         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2616                 seq_puts(seq, ",user_xattr");
2617
2618         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2619                 seq_puts(seq, ",lazystatfs");
2620
2621         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2622                 seq_puts(seq, ",user_fid2path");
2623
2624         RETURN(0);
2625 }
2626
2627 /**
2628  * Get obd name by cmd, and copy out to user space
2629  */
2630 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2631 {
2632         struct ll_sb_info *sbi = ll_i2sbi(inode);
2633         struct obd_device *obd;
2634         ENTRY;
2635
2636         if (cmd == OBD_IOC_GETDTNAME)
2637                 obd = class_exp2obd(sbi->ll_dt_exp);
2638         else if (cmd == OBD_IOC_GETMDNAME)
2639                 obd = class_exp2obd(sbi->ll_md_exp);
2640         else
2641                 RETURN(-EINVAL);
2642
2643         if (!obd)
2644                 RETURN(-ENOENT);
2645
2646         if (copy_to_user((void __user *)arg, obd->obd_name,
2647                          strlen(obd->obd_name) + 1))
2648                 RETURN(-EFAULT);
2649
2650         RETURN(0);
2651 }
2652
2653 /**
2654  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2655  * fsname will be returned in this buffer; otherwise, a static buffer will be
2656  * used to store the fsname and returned to caller.
2657  */
2658 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2659 {
2660         static char fsname_static[MTI_NAME_MAXLEN];
2661         struct lustre_sb_info *lsi = s2lsi(sb);
2662         char *ptr;
2663         int len;
2664
2665         if (buf == NULL) {
2666                 /* this means the caller wants to use static buffer
2667                  * and it doesn't care about race. Usually this is
2668                  * in error reporting path */
2669                 buf = fsname_static;
2670                 buflen = sizeof(fsname_static);
2671         }
2672
2673         len = strlen(lsi->lsi_lmd->lmd_profile);
2674         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2675         if (ptr && (strcmp(ptr, "-client") == 0))
2676                 len -= 7;
2677
2678         if (unlikely(len >= buflen))
2679                 len = buflen - 1;
2680         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2681         buf[len] = '\0';
2682
2683         return buf;
2684 }
2685
2686 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2687 {
2688         char *path = NULL;
2689
2690         struct path p;
2691
2692         p.dentry = dentry;
2693         p.mnt = current->fs->root.mnt;
2694         path_get(&p);
2695         path = d_path(&p, buf, bufsize);
2696         path_put(&p);
2697         return path;
2698 }
2699
2700 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2701 {
2702         char *buf, *path = NULL;
2703         struct dentry *dentry = NULL;
2704         struct vvp_object *obj = cl_inode2vvp(page->mapping->host);
2705
2706         /* this can be called inside spin lock so use GFP_ATOMIC. */
2707         buf = (char *)__get_free_page(GFP_ATOMIC);
2708         if (buf != NULL) {
2709                 dentry = d_find_alias(page->mapping->host);
2710                 if (dentry != NULL)
2711                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2712         }
2713
2714         CDEBUG(D_WARNING,
2715                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2716                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2717                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2718                PFID(&obj->vob_header.coh_lu.loh_fid),
2719                (path && !IS_ERR(path)) ? path : "", ioret);
2720
2721         if (dentry != NULL)
2722                 dput(dentry);
2723
2724         if (buf != NULL)
2725                 free_page((unsigned long)buf);
2726 }
2727
2728 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2729                         struct lov_user_md **kbuf)
2730 {
2731         struct lov_user_md      lum;
2732         ssize_t                 lum_size;
2733         ENTRY;
2734
2735         if (copy_from_user(&lum, md, sizeof(lum)))
2736                 RETURN(-EFAULT);
2737
2738         lum_size = ll_lov_user_md_size(&lum);
2739         if (lum_size < 0)
2740                 RETURN(lum_size);
2741
2742         OBD_ALLOC(*kbuf, lum_size);
2743         if (*kbuf == NULL)
2744                 RETURN(-ENOMEM);
2745
2746         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2747                 OBD_FREE(*kbuf, lum_size);
2748                 RETURN(-EFAULT);
2749         }
2750
2751         RETURN(lum_size);
2752 }
2753
2754 /*
2755  * Compute llite root squash state after a change of root squash
2756  * configuration setting or add/remove of a lnet nid
2757  */
2758 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2759 {
2760         struct root_squash_info *squash = &sbi->ll_squash;
2761         int i;
2762         bool matched;
2763         lnet_process_id_t id;
2764
2765         /* Update norootsquash flag */
2766         down_write(&squash->rsi_sem);
2767         if (list_empty(&squash->rsi_nosquash_nids))
2768                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2769         else {
2770                 /* Do not apply root squash as soon as one of our NIDs is
2771                  * in the nosquash_nids list */
2772                 matched = false;
2773                 i = 0;
2774                 while (LNetGetId(i++, &id) != -ENOENT) {
2775                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2776                                 continue;
2777                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2778                                 matched = true;
2779                                 break;
2780                         }
2781                 }
2782                 if (matched)
2783                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2784                 else
2785                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2786         }
2787         up_write(&squash->rsi_sem);
2788 }
2789
2790 /**
2791  * Parse linkea content to extract information about a given hardlink
2792  *
2793  * \param[in]   ldata      - Initialized linkea data
2794  * \param[in]   linkno     - Link identifier
2795  * \param[out]  parent_fid - The entry's parent FID
2796  * \param[out]  ln         - Entry name destination buffer
2797  *
2798  * \retval 0 on success
2799  * \retval Appropriate negative error code on failure
2800  */
2801 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2802                             struct lu_fid *parent_fid, struct lu_name *ln)
2803 {
2804         unsigned int    idx;
2805         int             rc;
2806         ENTRY;
2807
2808         rc = linkea_init(ldata);
2809         if (rc < 0)
2810                 RETURN(rc);
2811
2812         if (linkno >= ldata->ld_leh->leh_reccount)
2813                 /* beyond last link */
2814                 RETURN(-ENODATA);
2815
2816         linkea_first_entry(ldata);
2817         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2818                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2819                                     parent_fid);
2820                 if (idx == linkno)
2821                         break;
2822
2823                 linkea_next_entry(ldata);
2824         }
2825
2826         if (idx < linkno)
2827                 RETURN(-ENODATA);
2828
2829         RETURN(0);
2830 }
2831
2832 /**
2833  * Get parent FID and name of an identified link. Operation is performed for
2834  * a given link number, letting the caller iterate over linkno to list one or
2835  * all links of an entry.
2836  *
2837  * \param[in]     file - File descriptor against which to perform the operation
2838  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2839  *                       on and the available size. It is eventually filled with
2840  *                       the requested information or left untouched on error
2841  *
2842  * \retval - 0 on success
2843  * \retval - Appropriate negative error code on failure
2844  */
2845 int ll_getparent(struct file *file, struct getparent __user *arg)
2846 {
2847         struct dentry           *dentry = file->f_dentry;
2848         struct inode            *inode = file->f_dentry->d_inode;
2849         struct linkea_data      *ldata;
2850         struct lu_buf            buf = LU_BUF_NULL;
2851         struct lu_name           ln;
2852         struct lu_fid            parent_fid;
2853         __u32                    linkno;
2854         __u32                    name_size;
2855         int                      rc;
2856
2857         ENTRY;
2858
2859         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2860             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2861                 RETURN(-EPERM);
2862
2863         if (get_user(name_size, &arg->gp_name_size))
2864                 RETURN(-EFAULT);
2865
2866         if (get_user(linkno, &arg->gp_linkno))
2867                 RETURN(-EFAULT);
2868
2869         if (name_size > PATH_MAX)
2870                 RETURN(-EINVAL);
2871
2872         OBD_ALLOC(ldata, sizeof(*ldata));
2873         if (ldata == NULL)
2874                 RETURN(-ENOMEM);
2875
2876         rc = linkea_data_new(ldata, &buf);
2877         if (rc < 0)
2878                 GOTO(ldata_free, rc);
2879
2880         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2881         if (rc < 0)
2882                 GOTO(lb_free, rc);
2883
2884         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2885         if (rc < 0)
2886                 GOTO(lb_free, rc);
2887
2888         if (ln.ln_namelen >= name_size)
2889                 GOTO(lb_free, rc = -EOVERFLOW);
2890
2891         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2892                 GOTO(lb_free, rc = -EFAULT);
2893
2894         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2895                 GOTO(lb_free, rc = -EFAULT);
2896
2897         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2898                 GOTO(lb_free, rc = -EFAULT);
2899
2900 lb_free:
2901         lu_buf_free(&buf);
2902 ldata_free:
2903         OBD_FREE(ldata, sizeof(*ldata));
2904
2905         RETURN(rc);
2906 }