lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/statfs.h>
  41 #include <linux/time.h>
  42 #include <linux/types.h>
  43 #include <linux/version.h>
  44 #include <linux/mm.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <linux/security.h>
  50
  51 #include <uapi/linux/lustre_ioctl.h>
  52 #include <lustre_ha.h>
  53 #include <lustre_dlm.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_disk.h>
  56 #include <lustre_param.h>
  57 #include <lustre_log.h>
  58 #include <cl_object.h>
  59 #include <obd_cksum.h>
  60 #include "llite_internal.h"
  61
  62 struct kmem_cache *ll_file_data_slab;
  63
  64 #ifndef log2
  65 #define log2(n) ffz(~(n))
  66 #endif
  67
  68 static struct ll_sb_info *ll_init_sbi(void)
  69 {
  70         struct ll_sb_info *sbi = NULL;
  71         unsigned long pages;
  72         unsigned long lru_page_max;
  73         struct sysinfo si;
  74         class_uuid_t uuid;
  75         int i;
  76         ENTRY;
  77
  78         OBD_ALLOC_PTR(sbi);
  79         if (sbi == NULL)
  80                 RETURN(NULL);
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         lru_page_max = pages / 2;
  91
  92         /* initialize ll_cache data */
  93         sbi->ll_cache = cl_cache_init(lru_page_max);
  94         if (sbi->ll_cache == NULL) {
  95                 OBD_FREE(sbi, sizeof(*sbi));
  96                 RETURN(NULL);
  97         }
  98
  99         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 100                                            SBI_DEFAULT_READAHEAD_MAX);
 101         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 102         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 103                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 104
 105         ll_generate_random_uuid(uuid);
 106         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 107         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 108
 109         sbi->ll_flags |= LL_SBI_VERBOSE;
 110 #ifdef ENABLE_CHECKSUM
 111         sbi->ll_flags |= LL_SBI_CHECKSUM;
 112 #endif
 113
 114 #ifdef HAVE_LRU_RESIZE_SUPPORT
 115         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 116 #endif
 117         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 118
 119         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 120                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 121                                pp_r_hist.oh_lock);
 122                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 123                                pp_w_hist.oh_lock);
 124         }
 125
 126         /* metadata statahead is enabled by default */
 127         sbi->ll_sa_max = LL_SA_RPC_DEF;
 128         atomic_set(&sbi->ll_sa_total, 0);
 129         atomic_set(&sbi->ll_sa_wrong, 0);
 130         atomic_set(&sbi->ll_sa_running, 0);
 131         atomic_set(&sbi->ll_agl_total, 0);
 132         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 133         sbi->ll_flags |= LL_SBI_FAST_READ;
 134
 135         /* root squash */
 136         sbi->ll_squash.rsi_uid = 0;
 137         sbi->ll_squash.rsi_gid = 0;
 138         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 139         init_rwsem(&sbi->ll_squash.rsi_sem);
 140
 141         RETURN(sbi);
 142 }
 143
 144 static void ll_free_sbi(struct super_block *sb)
 145 {
 146         struct ll_sb_info *sbi = ll_s2sbi(sb);
 147         ENTRY;
 148
 149         if (sbi != NULL) {
 150                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 151                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 152                 if (sbi->ll_cache != NULL) {
 153                         cl_cache_decref(sbi->ll_cache);
 154                         sbi->ll_cache = NULL;
 155                 }
 156                 OBD_FREE(sbi, sizeof(*sbi));
 157         }
 158         EXIT;
 159 }
 160
 161 static inline int obd_connect_has_secctx(struct obd_connect_data *data)
 162 {
 163         return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
 164                data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
 165 }
 166
 167 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 168                                     struct vfsmount *mnt)
 169 {
 170         struct inode *root = NULL;
 171         struct ll_sb_info *sbi = ll_s2sbi(sb);
 172         struct obd_device *obd;
 173         struct obd_statfs *osfs = NULL;
 174         struct ptlrpc_request *request = NULL;
 175         struct obd_connect_data *data = NULL;
 176         struct obd_uuid *uuid;
 177         struct md_op_data *op_data;
 178         struct lustre_md lmd;
 179         u64 valid;
 180         int size, err, checksum;
 181         ENTRY;
 182
 183         obd = class_name2obd(md);
 184         if (!obd) {
 185                 CERROR("MD %s: not setup or attached\n", md);
 186                 RETURN(-EINVAL);
 187         }
 188
 189         OBD_ALLOC_PTR(data);
 190         if (data == NULL)
 191                 RETURN(-ENOMEM);
 192
 193         OBD_ALLOC_PTR(osfs);
 194         if (osfs == NULL) {
 195                 OBD_FREE_PTR(data);
 196                 RETURN(-ENOMEM);
 197         }
 198
 199         /* indicate the features supported by this client */
 200         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 201                                   OBD_CONNECT_ATTRFID  |
 202                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 203                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 204                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 205                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 206                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 207                                   OBD_CONNECT_64BITHASH |
 208                                   OBD_CONNECT_EINPROGRESS |
 209                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 210                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 211                                   OBD_CONNECT_MAX_EASIZE |
 212                                   OBD_CONNECT_FLOCK_DEAD |
 213                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 214                                   OBD_CONNECT_OPEN_BY_FID |
 215                                   OBD_CONNECT_DIR_STRIPE |
 216                                   OBD_CONNECT_BULK_MBITS |
 217                                   OBD_CONNECT_SUBTREE |
 218                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_MULTIMODRPCS;
 219
 220         data->ocd_connect_flags2 = 0;
 221
 222 #ifdef HAVE_LRU_RESIZE_SUPPORT
 223         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 224                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 225 #endif
 226 #ifdef CONFIG_FS_POSIX_ACL
 227         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 228                                    OBD_CONNECT_LARGE_ACL;
 229 #endif
 230
 231         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 232                 /* flag mdc connection as lightweight, only used for test
 233                  * purpose, use with care */
 234                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 235
 236         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 237         data->ocd_version = LUSTRE_VERSION_CODE;
 238
 239         if (sb->s_flags & MS_RDONLY)
 240                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 241         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 242                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 243
 244         if (sbi->ll_flags & LL_SBI_FLOCK)
 245                 sbi->ll_fop = &ll_file_operations_flock;
 246         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 247                 sbi->ll_fop = &ll_file_operations;
 248         else
 249                 sbi->ll_fop = &ll_file_operations_noflock;
 250
 251         /* always ping even if server suppress_pings */
 252         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 253                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 254
 255 #ifdef HAVE_SECURITY_DENTRY_INIT_SECURITY
 256         data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
 257 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
 258
 259         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 260
 261         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 262         if (err == -EBUSY) {
 263                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 264                                    "recovery, of which this client is not a "
 265                                    "part. Please wait for recovery to complete,"
 266                                    " abort, or time out.\n", md);
 267                 GOTO(out, err);
 268         } else if (err) {
 269                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 270                 GOTO(out, err);
 271         }
 272
 273         sbi->ll_md_exp->exp_connect_data = *data;
 274
 275         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 276                            LUSTRE_SEQ_METADATA);
 277         if (err) {
 278                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 279                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 280                 GOTO(out_md, err);
 281         }
 282
 283         /* For mount, we only need fs info from MDT0, and also in DNE, it
 284          * can make sure the client can be mounted as long as MDT0 is
 285          * avaible */
 286         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 287                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 288                         OBD_STATFS_FOR_MDT0);
 289         if (err)
 290                 GOTO(out_md_fid, err);
 291
 292         /* This needs to be after statfs to ensure connect has finished.
 293          * Note that "data" does NOT contain the valid connect reply.
 294          * If connecting to a 1.8 server there will be no LMV device, so
 295          * we can access the MDC export directly and exp_connect_flags will
 296          * be non-zero, but if accessing an upgraded 2.1 server it will
 297          * have the correct flags filled in.
 298          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 299         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 300         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 301             valid != CLIENT_CONNECT_MDT_REQD) {
 302                 char *buf;
 303
 304                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 305                 obd_connect_flags2str(buf, PAGE_SIZE,
 306                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 307                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 308                                    "feature(s) needed for correct operation "
 309                                    "of this client (%s). Please upgrade "
 310                                    "server or downgrade client.\n",
 311                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 312                 OBD_FREE(buf, PAGE_SIZE);
 313                 GOTO(out_md_fid, err = -EPROTO);
 314         }
 315
 316         size = sizeof(*data);
 317         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 318                            KEY_CONN_DATA,  &size, data);
 319         if (err) {
 320                 CERROR("%s: Get connect data failed: rc = %d\n",
 321                        sbi->ll_md_exp->exp_obd->obd_name, err);
 322                 GOTO(out_md_fid, err);
 323         }
 324
 325         LASSERT(osfs->os_bsize);
 326         sb->s_blocksize = osfs->os_bsize;
 327         sb->s_blocksize_bits = log2(osfs->os_bsize);
 328         sb->s_magic = LL_SUPER_MAGIC;
 329         sb->s_maxbytes = MAX_LFS_FILESIZE;
 330         sbi->ll_namelen = osfs->os_namelen;
 331         sbi->ll_mnt.mnt = current->fs->root.mnt;
 332
 333         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 334             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 335                 LCONSOLE_INFO("Disabling user_xattr feature because "
 336                               "it is not supported on the server\n");
 337                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 338         }
 339
 340         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 341 #ifdef MS_POSIXACL
 342                 sb->s_flags |= MS_POSIXACL;
 343 #endif
 344                 sbi->ll_flags |= LL_SBI_ACL;
 345         } else {
 346                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 347 #ifdef MS_POSIXACL
 348                 sb->s_flags &= ~MS_POSIXACL;
 349 #endif
 350                 sbi->ll_flags &= ~LL_SBI_ACL;
 351         }
 352
 353         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 354                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 355
 356         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 357                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 358
 359         if (obd_connect_has_secctx(data))
 360                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 361
 362         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 363                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 364                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 365                                       "unknown maximum xattr size.\n", dt);
 366                 } else {
 367                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 368                         sbi->ll_xattr_cache_enabled = 1;
 369                 }
 370         }
 371
 372         obd = class_name2obd(dt);
 373         if (!obd) {
 374                 CERROR("DT %s: not setup or attached\n", dt);
 375                 GOTO(out_md_fid, err = -ENODEV);
 376         }
 377
 378         /* pass client page size via ocd_grant_blkbits, the server should report
 379          * back its backend blocksize for grant calculation purpose */
 380         data->ocd_grant_blkbits = PAGE_SHIFT;
 381
 382         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 383                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 384                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 385                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 386                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 387                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 388                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 389                                   OBD_CONNECT_EINPROGRESS |
 390                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 391                                   OBD_CONNECT_LAYOUTLOCK |
 392                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 393                                   OBD_CONNECT_BULK_MBITS;
 394
 395         data->ocd_connect_flags2 = 0;
 396
 397         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 398                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 399
 400         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 401          * disabled by default, because it can still be enabled on the
 402          * fly via /proc. As a consequence, we still need to come to an
 403          * agreement on the supported algorithms at connect time */
 404         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 405
 406         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 407                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 408         else
 409                 data->ocd_cksum_types = cksum_types_supported_client();
 410
 411 #ifdef HAVE_LRU_RESIZE_SUPPORT
 412         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 413 #endif
 414         /* always ping even if server suppress_pings */
 415         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 416                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 417
 418         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 419                "ocd_grant: %d\n", data->ocd_connect_flags,
 420                data->ocd_version, data->ocd_grant);
 421
 422         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 423         obd->obd_upcall.onu_upcall = cl_ocd_update;
 424
 425         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 426
 427         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 428                           NULL);
 429         if (err == -EBUSY) {
 430                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 431                                    "recovery, of which this client is not a "
 432                                    "part.  Please wait for recovery to "
 433                                    "complete, abort, or time out.\n", dt);
 434                 GOTO(out_md, err);
 435         } else if (err) {
 436                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 437                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 438                 GOTO(out_md, err);
 439         }
 440
 441         sbi->ll_dt_exp->exp_connect_data = *data;
 442
 443         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 444                            LUSTRE_SEQ_METADATA);
 445         if (err) {
 446                 CERROR("%s: Can't init data layer FID infrastructure, "
 447                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 448                 GOTO(out_dt, err);
 449         }
 450
 451         mutex_lock(&sbi->ll_lco.lco_lock);
 452         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 453         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 454         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 455         mutex_unlock(&sbi->ll_lco.lco_lock);
 456
 457         fid_zero(&sbi->ll_root_fid);
 458         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 459                            &sbi->ll_root_fid);
 460         if (err) {
 461                 CERROR("cannot mds_connect: rc = %d\n", err);
 462                 GOTO(out_lock_cn_cb, err);
 463         }
 464         if (!fid_is_sane(&sbi->ll_root_fid)) {
 465                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 466                        sbi->ll_md_exp->exp_obd->obd_name,
 467                        PFID(&sbi->ll_root_fid));
 468                 GOTO(out_lock_cn_cb, err = -EINVAL);
 469         }
 470         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 471
 472         sb->s_op = &lustre_super_operations;
 473 #if THREAD_SIZE >= 8192 /*b=17630*/
 474         sb->s_export_op = &lustre_export_operations;
 475 #endif
 476
 477         /* make root inode
 478          * XXX: move this to after cbd setup? */
 479         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 480         if (sbi->ll_flags & LL_SBI_ACL)
 481                 valid |= OBD_MD_FLACL;
 482
 483         OBD_ALLOC_PTR(op_data);
 484         if (op_data == NULL)
 485                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 486
 487         op_data->op_fid1 = sbi->ll_root_fid;
 488         op_data->op_mode = 0;
 489         op_data->op_valid = valid;
 490
 491         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 492
 493         OBD_FREE_PTR(op_data);
 494         if (err) {
 495                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 496                        sbi->ll_md_exp->exp_obd->obd_name, err);
 497                 GOTO(out_lock_cn_cb, err);
 498         }
 499
 500         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 501                                sbi->ll_md_exp, &lmd);
 502         if (err) {
 503                 CERROR("failed to understand root inode md: rc = %d\n", err);
 504                 ptlrpc_req_finished(request);
 505                 GOTO(out_lock_cn_cb, err);
 506         }
 507
 508         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 509         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 510                                             sbi->ll_flags & LL_SBI_32BIT_API),
 511                        &lmd);
 512         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 513         ptlrpc_req_finished(request);
 514
 515         if (IS_ERR(root)) {
 516 #ifdef CONFIG_FS_POSIX_ACL
 517                 if (lmd.posix_acl) {
 518                         posix_acl_release(lmd.posix_acl);
 519                         lmd.posix_acl = NULL;
 520                 }
 521 #endif
 522                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 523                 root = NULL;
 524                 CERROR("lustre_lite: bad iget4 for root\n");
 525                 GOTO(out_root, err);
 526         }
 527
 528         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 529         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 530                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 531                                  NULL);
 532         if (err) {
 533                 CERROR("%s: Set checksum failed: rc = %d\n",
 534                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 535                 GOTO(out_root, err);
 536         }
 537         cl_sb_init(sb);
 538
 539         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 540                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 541                                  sbi->ll_cache, NULL);
 542         if (err) {
 543                 CERROR("%s: Set cache_set failed: rc = %d\n",
 544                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 545                 GOTO(out_root, err);
 546         }
 547
 548         sb->s_root = d_make_root(root);
 549         if (sb->s_root == NULL) {
 550                 CERROR("%s: can't make root dentry\n",
 551                         ll_get_fsname(sb, NULL, 0));
 552                 GOTO(out_root, err = -ENOMEM);
 553         }
 554 #ifdef HAVE_DCACHE_LOCK
 555         sb->s_root->d_op = &ll_d_ops;
 556 #endif
 557
 558         sbi->ll_sdev_orig = sb->s_dev;
 559
 560         /* We set sb->s_dev equal on all lustre clients in order to support
 561          * NFS export clustering.  NFSD requires that the FSID be the same
 562          * on all clients. */
 563         /* s_dev is also used in lt_compare() to compare two fs, but that is
 564          * only a node-local comparison. */
 565         uuid = obd_get_uuid(sbi->ll_md_exp);
 566         if (uuid != NULL)
 567                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 568
 569         if (data != NULL)
 570                 OBD_FREE_PTR(data);
 571         if (osfs != NULL)
 572                 OBD_FREE_PTR(osfs);
 573         if (proc_lustre_fs_root != NULL) {
 574                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 575                                                   dt, md);
 576                 if (err < 0) {
 577                         CERROR("%s: could not register mount in lprocfs: "
 578                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 579                         err = 0;
 580                 }
 581         }
 582
 583         RETURN(err);
 584 out_root:
 585         if (root)
 586                 iput(root);
 587 out_lock_cn_cb:
 588         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 589 out_dt:
 590         obd_disconnect(sbi->ll_dt_exp);
 591         sbi->ll_dt_exp = NULL;
 592 out_md_fid:
 593         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 594 out_md:
 595         obd_disconnect(sbi->ll_md_exp);
 596         sbi->ll_md_exp = NULL;
 597 out:
 598         if (data != NULL)
 599                 OBD_FREE_PTR(data);
 600         if (osfs != NULL)
 601                 OBD_FREE_PTR(osfs);
 602         return err;
 603 }
 604
 605 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 606 {
 607         int size, rc;
 608
 609         size = sizeof(*lmmsize);
 610         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 611                           KEY_MAX_EASIZE, &size, lmmsize);
 612         if (rc != 0) {
 613                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 614                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 615                 RETURN(rc);
 616         }
 617
 618         size = sizeof(int);
 619         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 620                           KEY_MAX_EASIZE, &size, lmmsize);
 621         if (rc)
 622                 CERROR("Get max mdsize error rc %d\n", rc);
 623
 624         RETURN(rc);
 625 }
 626
 627 /**
 628  * Get the value of the default_easize parameter.
 629  *
 630  * \see client_obd::cl_default_mds_easize
 631  *
 632  * \param[in] sbi       superblock info for this filesystem
 633  * \param[out] lmmsize  pointer to storage location for value
 634  *
 635  * \retval 0            on success
 636  * \retval negative     negated errno on failure
 637  */
 638 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 639 {
 640         int size, rc;
 641
 642         size = sizeof(int);
 643         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 644                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 645         if (rc)
 646                 CERROR("Get default mdsize error rc %d\n", rc);
 647
 648         RETURN(rc);
 649 }
 650
 651 /**
 652  * Set the default_easize parameter to the given value.
 653  *
 654  * \see client_obd::cl_default_mds_easize
 655  *
 656  * \param[in] sbi       superblock info for this filesystem
 657  * \param[in] lmmsize   the size to set
 658  *
 659  * \retval 0            on success
 660  * \retval negative     negated errno on failure
 661  */
 662 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 663 {
 664         int rc;
 665
 666         if (lmmsize < sizeof(struct lov_mds_md) ||
 667             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 668                 return -EINVAL;
 669
 670         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 671                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 672                                 sizeof(int), &lmmsize, NULL);
 673
 674         RETURN(rc);
 675 }
 676
 677 static void client_common_put_super(struct super_block *sb)
 678 {
 679         struct ll_sb_info *sbi = ll_s2sbi(sb);
 680         ENTRY;
 681
 682         cl_sb_fini(sb);
 683
 684         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 685         obd_disconnect(sbi->ll_dt_exp);
 686         sbi->ll_dt_exp = NULL;
 687
 688         lprocfs_unregister_mountpoint(sbi);
 689
 690         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 691         obd_disconnect(sbi->ll_md_exp);
 692         sbi->ll_md_exp = NULL;
 693
 694         EXIT;
 695 }
 696
 697 void ll_kill_super(struct super_block *sb)
 698 {
 699         struct ll_sb_info *sbi;
 700         ENTRY;
 701
 702         /* not init sb ?*/
 703         if (!(sb->s_flags & MS_ACTIVE))
 704                 return;
 705
 706         sbi = ll_s2sbi(sb);
 707         /* we need restore s_dev from changed for clustred NFS before put_super
 708          * because new kernels have cached s_dev and change sb->s_dev in
 709          * put_super not affected real removing devices */
 710         if (sbi) {
 711                 sb->s_dev = sbi->ll_sdev_orig;
 712                 sbi->ll_umounting = 1;
 713
 714                 /* wait running statahead threads to quit */
 715                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 716                         set_current_state(TASK_UNINTERRUPTIBLE);
 717                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 718                 }
 719         }
 720
 721         EXIT;
 722 }
 723
 724 static inline int ll_set_opt(const char *opt, char *data, int fl)
 725 {
 726         if (strncmp(opt, data, strlen(opt)) != 0)
 727                 return(0);
 728         else
 729                 return(fl);
 730 }
 731
 732 /* non-client-specific mount options are parsed in lmd_parse */
 733 static int ll_options(char *options, int *flags)
 734 {
 735         int tmp;
 736         char *s1 = options, *s2;
 737         ENTRY;
 738
 739         if (!options)
 740                 RETURN(0);
 741
 742         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 743
 744         while (*s1) {
 745                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 746                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 747                 if (tmp) {
 748                         *flags |= tmp;
 749                         goto next;
 750                 }
 751                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 752                 if (tmp) {
 753                         *flags |= tmp;
 754                         goto next;
 755                 }
 756                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 757                 if (tmp) {
 758                         *flags |= tmp;
 759                         goto next;
 760                 }
 761                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 762                 if (tmp) {
 763                         *flags &= ~tmp;
 764                         goto next;
 765                 }
 766                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 767                 if (tmp) {
 768                         *flags |= tmp;
 769                         goto next;
 770                 }
 771                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 772                 if (tmp) {
 773                         *flags &= ~tmp;
 774                         goto next;
 775                 }
 776                 tmp = ll_set_opt("context", s1, 1);
 777                 if (tmp)
 778                         goto next;
 779                 tmp = ll_set_opt("fscontext", s1, 1);
 780                 if (tmp)
 781                         goto next;
 782                 tmp = ll_set_opt("defcontext", s1, 1);
 783                 if (tmp)
 784                         goto next;
 785                 tmp = ll_set_opt("rootcontext", s1, 1);
 786                 if (tmp)
 787                         goto next;
 788                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 789                 if (tmp) {
 790                         *flags |= tmp;
 791                         goto next;
 792                 }
 793                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 794                 if (tmp) {
 795                         *flags &= ~tmp;
 796                         goto next;
 797                 }
 798
 799                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 800                 if (tmp) {
 801                         *flags |= tmp;
 802                         goto next;
 803                 }
 804                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 805                 if (tmp) {
 806                         *flags &= ~tmp;
 807                         goto next;
 808                 }
 809                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 810                 if (tmp) {
 811                         *flags |= tmp;
 812                         goto next;
 813                 }
 814                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 815                 if (tmp) {
 816                         *flags &= ~tmp;
 817                         goto next;
 818                 }
 819                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 820                 if (tmp) {
 821                         *flags |= tmp;
 822                         goto next;
 823                 }
 824                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 825                 if (tmp) {
 826                         *flags &= ~tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 830                 if (tmp) {
 831                         *flags |= tmp;
 832                         goto next;
 833                 }
 834                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 835                 if (tmp) {
 836                         *flags |= tmp;
 837                         goto next;
 838                 }
 839                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 840                 if (tmp) {
 841                         *flags &= ~tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 850                                    s1);
 851                 RETURN(-EINVAL);
 852
 853 next:
 854                 /* Find next opt */
 855                 s2 = strchr(s1, ',');
 856                 if (s2 == NULL)
 857                         break;
 858                 s1 = s2 + 1;
 859         }
 860         RETURN(0);
 861 }
 862
 863 void ll_lli_init(struct ll_inode_info *lli)
 864 {
 865         lli->lli_inode_magic = LLI_INODE_MAGIC;
 866         lli->lli_flags = 0;
 867         spin_lock_init(&lli->lli_lock);
 868         lli->lli_posix_acl = NULL;
 869         /* Do not set lli_fid, it has been initialized already. */
 870         fid_zero(&lli->lli_pfid);
 871         lli->lli_mds_read_och = NULL;
 872         lli->lli_mds_write_och = NULL;
 873         lli->lli_mds_exec_och = NULL;
 874         lli->lli_open_fd_read_count = 0;
 875         lli->lli_open_fd_write_count = 0;
 876         lli->lli_open_fd_exec_count = 0;
 877         mutex_init(&lli->lli_och_mutex);
 878         spin_lock_init(&lli->lli_agl_lock);
 879         spin_lock_init(&lli->lli_layout_lock);
 880         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 881         lli->lli_clob = NULL;
 882
 883         init_rwsem(&lli->lli_xattrs_list_rwsem);
 884         mutex_init(&lli->lli_xattrs_enq_lock);
 885
 886         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 887         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 888                 mutex_init(&lli->lli_readdir_mutex);
 889                 lli->lli_opendir_key = NULL;
 890                 lli->lli_sai = NULL;
 891                 spin_lock_init(&lli->lli_sa_lock);
 892                 lli->lli_opendir_pid = 0;
 893                 lli->lli_sa_enabled = 0;
 894                 lli->lli_def_stripe_offset = -1;
 895         } else {
 896                 mutex_init(&lli->lli_size_mutex);
 897                 lli->lli_symlink_name = NULL;
 898                 init_rwsem(&lli->lli_trunc_sem);
 899                 range_lock_tree_init(&lli->lli_write_tree);
 900                 init_rwsem(&lli->lli_glimpse_sem);
 901                 lli->lli_glimpse_time = 0;
 902                 INIT_LIST_HEAD(&lli->lli_agl_list);
 903                 lli->lli_agl_index = 0;
 904                 lli->lli_async_rc = 0;
 905         }
 906         mutex_init(&lli->lli_layout_mutex);
 907         memset(lli->lli_jobid, 0, LUSTRE_JOBID_SIZE);
 908 }
 909
 910 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 911 {
 912         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 913
 914         bdi->name = "lustre";
 915         return bdi_register(bdi, NULL, "lustre-%d",
 916                             atomic_inc_return(&ll_bdi_num));
 917 }
 918
 919 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 920 {
 921         struct lustre_profile *lprof = NULL;
 922         struct lustre_sb_info *lsi = s2lsi(sb);
 923         struct ll_sb_info *sbi;
 924         char  *dt = NULL, *md = NULL;
 925         char  *profilenm = get_profile_name(sb);
 926         struct config_llog_instance *cfg;
 927         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 928         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 929         int    err;
 930         ENTRY;
 931
 932         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 933
 934         OBD_ALLOC_PTR(cfg);
 935         if (cfg == NULL)
 936                 RETURN(-ENOMEM);
 937
 938         try_module_get(THIS_MODULE);
 939
 940         /* client additional sb info */
 941         lsi->lsi_llsbi = sbi = ll_init_sbi();
 942         if (!sbi) {
 943                 module_put(THIS_MODULE);
 944                 OBD_FREE_PTR(cfg);
 945                 RETURN(-ENOMEM);
 946         }
 947
 948         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 949         if (err)
 950                 GOTO(out_free, err);
 951
 952         err = bdi_init(&lsi->lsi_bdi);
 953         if (err)
 954                 GOTO(out_free, err);
 955         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 956 #ifdef HAVE_BDI_CAP_MAP_COPY
 957         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 958 #else
 959         lsi->lsi_bdi.capabilities = 0;
 960 #endif
 961         err = ll_bdi_register(&lsi->lsi_bdi);
 962         if (err)
 963                 GOTO(out_free, err);
 964
 965         sb->s_bdi = &lsi->lsi_bdi;
 966 #ifndef HAVE_DCACHE_LOCK
 967         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 968         sb->s_d_op = &ll_d_ops;
 969 #endif
 970
 971         /* Generate a string unique to this super, in case some joker tries
 972            to mount the same fs at two mount points.
 973            Use the address of the super itself.*/
 974         cfg->cfg_instance = sb;
 975         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 976         cfg->cfg_callback = class_config_llog_handler;
 977         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
 978         /* set up client obds */
 979         err = lustre_process_log(sb, profilenm, cfg);
 980         if (err < 0)
 981                 GOTO(out_free, err);
 982
 983         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 984         lprof = class_get_profile(profilenm);
 985         if (lprof == NULL) {
 986                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
 987                                    " read from the MGS.  Does that filesystem "
 988                                    "exist?\n", profilenm);
 989                 GOTO(out_free, err = -EINVAL);
 990         }
 991         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 992                lprof->lp_md, lprof->lp_dt);
 993
 994         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
 995         if (!dt)
 996                 GOTO(out_free, err = -ENOMEM);
 997         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
 998
 999         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1000         if (!md)
1001                 GOTO(out_free, err = -ENOMEM);
1002         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1003
1004         /* connections, registrations, sb setup */
1005         err = client_common_fill_super(sb, md, dt, mnt);
1006         if (err < 0)
1007                 GOTO(out_free, err);
1008
1009         sbi->ll_client_common_fill_super_succeeded = 1;
1010
1011 out_free:
1012         if (md)
1013                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1014         if (dt)
1015                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1016         if (lprof != NULL)
1017                 class_put_profile(lprof);
1018         if (err)
1019                 ll_put_super(sb);
1020         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1021                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1022
1023         OBD_FREE_PTR(cfg);
1024         RETURN(err);
1025 } /* ll_fill_super */
1026
1027 void ll_put_super(struct super_block *sb)
1028 {
1029         struct config_llog_instance cfg, params_cfg;
1030         struct obd_device *obd;
1031         struct lustre_sb_info *lsi = s2lsi(sb);
1032         struct ll_sb_info *sbi = ll_s2sbi(sb);
1033         char *profilenm = get_profile_name(sb);
1034         long ccc_count;
1035         int next, force = 1, rc = 0;
1036         ENTRY;
1037
1038         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1039
1040         cfg.cfg_instance = sb;
1041         lustre_end_log(sb, profilenm, &cfg);
1042
1043         params_cfg.cfg_instance = sb;
1044         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1045
1046         if (sbi->ll_md_exp) {
1047                 obd = class_exp2obd(sbi->ll_md_exp);
1048                 if (obd)
1049                         force = obd->obd_force;
1050         }
1051
1052         /* Wait for unstable pages to be committed to stable storage */
1053         if (force == 0) {
1054                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1055                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1056                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1057                         &lwi);
1058         }
1059
1060         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1061         if (force == 0 && rc != -EINTR)
1062                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1063
1064
1065         /* We need to set force before the lov_disconnect in
1066            lustre_common_put_super, since l_d cleans up osc's as well. */
1067         if (force) {
1068                 next = 0;
1069                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1070                                                      &next)) != NULL) {
1071                         obd->obd_force = force;
1072                 }
1073         }
1074
1075         if (sbi->ll_client_common_fill_super_succeeded) {
1076                 /* Only if client_common_fill_super succeeded */
1077                 client_common_put_super(sb);
1078         }
1079
1080         next = 0;
1081         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1082                 class_manual_cleanup(obd);
1083         }
1084
1085         if (sbi->ll_flags & LL_SBI_VERBOSE)
1086                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1087
1088         if (profilenm)
1089                 class_del_profile(profilenm);
1090
1091         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1092                 bdi_destroy(&lsi->lsi_bdi);
1093                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1094         }
1095
1096         ll_free_sbi(sb);
1097         lsi->lsi_llsbi = NULL;
1098
1099         lustre_common_put_super(sb);
1100
1101         cl_env_cache_purge(~0);
1102
1103         module_put(THIS_MODULE);
1104
1105         EXIT;
1106 } /* client_put_super */
1107
1108 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1109 {
1110         struct inode *inode = NULL;
1111
1112         /* NOTE: we depend on atomic igrab() -bzzz */
1113         lock_res_and_lock(lock);
1114         if (lock->l_resource->lr_lvb_inode) {
1115                 struct ll_inode_info * lli;
1116                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1117                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1118                         inode = igrab(lock->l_resource->lr_lvb_inode);
1119                 } else {
1120                         inode = lock->l_resource->lr_lvb_inode;
1121                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1122                                          D_WARNING, lock, "lr_lvb_inode %p is "
1123                                          "bogus: magic %08x",
1124                                          lock->l_resource->lr_lvb_inode,
1125                                          lli->lli_inode_magic);
1126                         inode = NULL;
1127                 }
1128         }
1129         unlock_res_and_lock(lock);
1130         return inode;
1131 }
1132
1133 void ll_dir_clear_lsm_md(struct inode *inode)
1134 {
1135         struct ll_inode_info *lli = ll_i2info(inode);
1136
1137         LASSERT(S_ISDIR(inode->i_mode));
1138
1139         if (lli->lli_lsm_md != NULL) {
1140                 lmv_free_memmd(lli->lli_lsm_md);
1141                 lli->lli_lsm_md = NULL;
1142         }
1143 }
1144
1145 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1146                                       const struct lu_fid *fid,
1147                                       struct lustre_md *md)
1148 {
1149         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1150         struct mdt_body         *body = md->body;
1151         struct inode            *inode;
1152         ino_t                   ino;
1153         ENTRY;
1154
1155         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1156         inode = iget_locked(sb, ino);
1157         if (inode == NULL) {
1158                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1159                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1160                 RETURN(ERR_PTR(-ENOENT));
1161         }
1162
1163         if (inode->i_state & I_NEW) {
1164                 struct ll_inode_info *lli = ll_i2info(inode);
1165                 struct lmv_stripe_md *lsm = md->lmv;
1166
1167                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1168                                 (body->mbo_mode & S_IFMT);
1169                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1170                          PFID(fid));
1171
1172                 LTIME_S(inode->i_mtime) = 0;
1173                 LTIME_S(inode->i_atime) = 0;
1174                 LTIME_S(inode->i_ctime) = 0;
1175                 inode->i_rdev = 0;
1176
1177 #ifdef HAVE_BACKING_DEV_INFO
1178                 /* initializing backing dev info. */
1179                 inode->i_mapping->backing_dev_info =
1180                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1181 #endif
1182                 inode->i_op = &ll_dir_inode_operations;
1183                 inode->i_fop = &ll_dir_operations;
1184                 lli->lli_fid = *fid;
1185                 ll_lli_init(lli);
1186
1187                 LASSERT(lsm != NULL);
1188                 /* master object FID */
1189                 lli->lli_pfid = body->mbo_fid1;
1190                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1191                        lli, PFID(fid), PFID(&lli->lli_pfid));
1192                 unlock_new_inode(inode);
1193         }
1194
1195         RETURN(inode);
1196 }
1197
1198 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1199 {
1200         struct lu_fid *fid;
1201         struct lmv_stripe_md *lsm = md->lmv;
1202         int i;
1203
1204         LASSERT(lsm != NULL);
1205         /* XXX sigh, this lsm_root initialization should be in
1206          * LMV layer, but it needs ll_iget right now, so we
1207          * put this here right now. */
1208         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1209                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1210                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1211                 /* Unfortunately ll_iget will call ll_update_inode,
1212                  * where the initialization of slave inode is slightly
1213                  * different, so it reset lsm_md to NULL to avoid
1214                  * initializing lsm for slave inode. */
1215                 /* For migrating inode, master stripe and master object will
1216                  * be same, so we only need assign this inode */
1217                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1218                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1219                 else
1220                         lsm->lsm_md_oinfo[i].lmo_root =
1221                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1222
1223                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1224                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1225
1226                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1227                         return rc;
1228                 }
1229         }
1230
1231         return 0;
1232 }
1233
1234 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1235                                 const struct lmv_stripe_md *lsm_md2)
1236 {
1237         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1238                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1239                lsm_md1->lsm_md_master_mdt_index ==
1240                                         lsm_md2->lsm_md_master_mdt_index &&
1241                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1242                lsm_md1->lsm_md_layout_version ==
1243                                         lsm_md2->lsm_md_layout_version &&
1244                strcmp(lsm_md1->lsm_md_pool_name,
1245                       lsm_md2->lsm_md_pool_name) == 0;
1246 }
1247
1248 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1249 {
1250         struct ll_inode_info *lli = ll_i2info(inode);
1251         struct lmv_stripe_md *lsm = md->lmv;
1252         int     rc;
1253         ENTRY;
1254
1255         LASSERT(S_ISDIR(inode->i_mode));
1256         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1257                PFID(ll_inode2fid(inode)));
1258
1259         /* no striped information from request. */
1260         if (lsm == NULL) {
1261                 if (lli->lli_lsm_md == NULL) {
1262                         RETURN(0);
1263                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1264                                                 LMV_HASH_FLAG_MIGRATION) {
1265                         /* migration is done, the temporay MIGRATE layout has
1266                          * been removed */
1267                         CDEBUG(D_INODE, DFID" finish migration.\n",
1268                                PFID(ll_inode2fid(inode)));
1269                         lmv_free_memmd(lli->lli_lsm_md);
1270                         lli->lli_lsm_md = NULL;
1271                         RETURN(0);
1272                 } else {
1273                         /* The lustre_md from req does not include stripeEA,
1274                          * see ll_md_setattr */
1275                         RETURN(0);
1276                 }
1277         }
1278
1279         /* set the directory layout */
1280         if (lli->lli_lsm_md == NULL) {
1281                 struct cl_attr  *attr;
1282
1283                 rc = ll_init_lsm_md(inode, md);
1284                 if (rc != 0)
1285                         RETURN(rc);
1286
1287                 /* set md->lmv to NULL, so the following free lustre_md
1288                  * will not free this lsm */
1289                 md->lmv = NULL;
1290                 lli->lli_lsm_md = lsm;
1291
1292                 OBD_ALLOC_PTR(attr);
1293                 if (attr == NULL)
1294                         RETURN(-ENOMEM);
1295
1296                 /* validate the lsm */
1297                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1298                                    ll_md_blocking_ast);
1299                 if (rc != 0) {
1300                         OBD_FREE_PTR(attr);
1301                         RETURN(rc);
1302                 }
1303
1304                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1305                         md->body->mbo_nlink = attr->cat_nlink;
1306                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1307                         md->body->mbo_size = attr->cat_size;
1308                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1309                         md->body->mbo_atime = attr->cat_atime;
1310                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1311                         md->body->mbo_ctime = attr->cat_ctime;
1312                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1313                         md->body->mbo_mtime = attr->cat_mtime;
1314
1315                 OBD_FREE_PTR(attr);
1316
1317                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1318                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1319                 RETURN(0);
1320         }
1321
1322         /* Compare the old and new stripe information */
1323         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1324                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1325                 int                     idx;
1326
1327                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1328                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1329                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1330                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1331                        inode, lsm, old_lsm,
1332                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1333                        lsm->lsm_md_stripe_count,
1334                        old_lsm->lsm_md_stripe_count,
1335                        lsm->lsm_md_master_mdt_index,
1336                        old_lsm->lsm_md_master_mdt_index,
1337                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1338                        lsm->lsm_md_layout_version,
1339                        old_lsm->lsm_md_layout_version,
1340                        lsm->lsm_md_pool_name,
1341                        old_lsm->lsm_md_pool_name);
1342
1343                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1344                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1345                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1346                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1347                 }
1348
1349                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1350                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1351                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1352                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1353                 }
1354
1355                 RETURN(-EIO);
1356         }
1357
1358         RETURN(0);
1359 }
1360
1361 void ll_clear_inode(struct inode *inode)
1362 {
1363         struct ll_inode_info *lli = ll_i2info(inode);
1364         struct ll_sb_info *sbi = ll_i2sbi(inode);
1365         ENTRY;
1366
1367         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1368                PFID(ll_inode2fid(inode)), inode);
1369
1370         if (S_ISDIR(inode->i_mode)) {
1371                 /* these should have been cleared in ll_file_release */
1372                 LASSERT(lli->lli_opendir_key == NULL);
1373                 LASSERT(lli->lli_sai == NULL);
1374                 LASSERT(lli->lli_opendir_pid == 0);
1375         }
1376
1377         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1378
1379         LASSERT(!lli->lli_open_fd_write_count);
1380         LASSERT(!lli->lli_open_fd_read_count);
1381         LASSERT(!lli->lli_open_fd_exec_count);
1382
1383         if (lli->lli_mds_write_och)
1384                 ll_md_real_close(inode, FMODE_WRITE);
1385         if (lli->lli_mds_exec_och)
1386                 ll_md_real_close(inode, FMODE_EXEC);
1387         if (lli->lli_mds_read_och)
1388                 ll_md_real_close(inode, FMODE_READ);
1389
1390         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1391                 OBD_FREE(lli->lli_symlink_name,
1392                          strlen(lli->lli_symlink_name) + 1);
1393                 lli->lli_symlink_name = NULL;
1394         }
1395
1396         ll_xattr_cache_destroy(inode);
1397
1398 #ifdef CONFIG_FS_POSIX_ACL
1399         if (lli->lli_posix_acl) {
1400                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1401                 posix_acl_release(lli->lli_posix_acl);
1402                 lli->lli_posix_acl = NULL;
1403         }
1404 #endif
1405         lli->lli_inode_magic = LLI_INODE_DEAD;
1406
1407         if (S_ISDIR(inode->i_mode))
1408                 ll_dir_clear_lsm_md(inode);
1409         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1410                 LASSERT(list_empty(&lli->lli_agl_list));
1411
1412         /*
1413          * XXX This has to be done before lsm is freed below, because
1414          * cl_object still uses inode lsm.
1415          */
1416         cl_inode_fini(inode);
1417
1418         EXIT;
1419 }
1420
1421 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1422 {
1423         struct lustre_md md;
1424         struct inode *inode = dentry->d_inode;
1425         struct ll_sb_info *sbi = ll_i2sbi(inode);
1426         struct ptlrpc_request *request = NULL;
1427         int rc, ia_valid;
1428         ENTRY;
1429
1430         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1431                                      LUSTRE_OPC_ANY, NULL);
1432         if (IS_ERR(op_data))
1433                 RETURN(PTR_ERR(op_data));
1434
1435         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1436         if (rc) {
1437                 ptlrpc_req_finished(request);
1438                 if (rc == -ENOENT) {
1439                         clear_nlink(inode);
1440                         /* Unlinked special device node? Or just a race?
1441                          * Pretend we done everything. */
1442                         if (!S_ISREG(inode->i_mode) &&
1443                             !S_ISDIR(inode->i_mode)) {
1444                                 ia_valid = op_data->op_attr.ia_valid;
1445                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1446                                 rc = simple_setattr(dentry, &op_data->op_attr);
1447                                 op_data->op_attr.ia_valid = ia_valid;
1448                         }
1449                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1450                         CERROR("md_setattr fails: rc = %d\n", rc);
1451                 }
1452                 RETURN(rc);
1453         }
1454
1455         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1456                               sbi->ll_md_exp, &md);
1457         if (rc) {
1458                 ptlrpc_req_finished(request);
1459                 RETURN(rc);
1460         }
1461
1462         ia_valid = op_data->op_attr.ia_valid;
1463         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1464          * cache is not cleared yet. */
1465         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1466         if (S_ISREG(inode->i_mode))
1467                 inode_lock(inode);
1468         rc = simple_setattr(dentry, &op_data->op_attr);
1469         if (S_ISREG(inode->i_mode))
1470                 inode_unlock(inode);
1471         op_data->op_attr.ia_valid = ia_valid;
1472
1473         rc = ll_update_inode(inode, &md);
1474         ptlrpc_req_finished(request);
1475
1476         RETURN(rc);
1477 }
1478
1479 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1480  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1481  * keep these values until such a time that objects are allocated for it.
1482  * We do the MDS operations first, as it is checking permissions for us.
1483  * We don't to the MDS RPC if there is nothing that we want to store there,
1484  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1485  * going to do an RPC anyways.
1486  *
1487  * If we are doing a truncate, we will send the mtime and ctime updates
1488  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1489  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1490  * at the same time.
1491  *
1492  * In case of HSMimport, we only set attr on MDS.
1493  */
1494 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1495 {
1496         struct inode *inode = dentry->d_inode;
1497         struct ll_inode_info *lli = ll_i2info(inode);
1498         struct md_op_data *op_data = NULL;
1499         int rc = 0;
1500         ENTRY;
1501
1502         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1503                "valid %x, hsm_import %d\n",
1504                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1505                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1506                hsm_import);
1507
1508         if (attr->ia_valid & ATTR_SIZE) {
1509                 /* Check new size against VFS/VM file size limit and rlimit */
1510                 rc = inode_newsize_ok(inode, attr->ia_size);
1511                 if (rc)
1512                         RETURN(rc);
1513
1514                 /* The maximum Lustre file size is variable, based on the
1515                  * OST maximum object size and number of stripes.  This
1516                  * needs another check in addition to the VFS check above. */
1517                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1518                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1519                                PFID(&lli->lli_fid), attr->ia_size,
1520                                ll_file_maxbytes(inode));
1521                         RETURN(-EFBIG);
1522                 }
1523
1524                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1525         }
1526
1527         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1528         if (attr->ia_valid & TIMES_SET_FLAGS) {
1529                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1530                     !cfs_capable(CFS_CAP_FOWNER))
1531                         RETURN(-EPERM);
1532         }
1533
1534         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1535         if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1536             (attr->ia_valid & ATTR_CTIME)) {
1537                 attr->ia_ctime = CURRENT_TIME;
1538                 attr->ia_valid |= ATTR_CTIME_SET;
1539         }
1540         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1541             (attr->ia_valid & ATTR_ATIME)) {
1542                 attr->ia_atime = CURRENT_TIME;
1543                 attr->ia_valid |= ATTR_ATIME_SET;
1544         }
1545         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1546             (attr->ia_valid & ATTR_MTIME)) {
1547                 attr->ia_mtime = CURRENT_TIME;
1548                 attr->ia_valid |= ATTR_MTIME_SET;
1549         }
1550
1551         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1552                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1553                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1554                        (s64)ktime_get_real_seconds());
1555
1556         if (S_ISREG(inode->i_mode)) {
1557                 if (attr->ia_valid & ATTR_SIZE)
1558                         inode_dio_write_done(inode);
1559                 inode_unlock(inode);
1560         }
1561
1562         /* We always do an MDS RPC, even if we're only changing the size;
1563          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1564
1565         OBD_ALLOC_PTR(op_data);
1566         if (op_data == NULL)
1567                 GOTO(out, rc = -ENOMEM);
1568
1569         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1570                 /* If we are changing file size, file content is
1571                  * modified, flag it. */
1572                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1573                 op_data->op_bias |= MDS_DATA_MODIFIED;
1574                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1575         }
1576
1577         op_data->op_attr = *attr;
1578
1579         rc = ll_md_setattr(dentry, op_data);
1580         if (rc)
1581                 GOTO(out, rc);
1582
1583         if (!S_ISREG(inode->i_mode) || hsm_import)
1584                 GOTO(out, rc = 0);
1585
1586         if (attr->ia_valid & (ATTR_SIZE |
1587                               ATTR_ATIME | ATTR_ATIME_SET |
1588                               ATTR_MTIME | ATTR_MTIME_SET |
1589                               ATTR_CTIME | ATTR_CTIME_SET)) {
1590                 /* For truncate and utimes sending attributes to OSTs, setting
1591                  * mtime/atime to the past will be performed under PW [0:EOF]
1592                  * extent lock (new_size:EOF for truncate).  It may seem
1593                  * excessive to send mtime/atime updates to OSTs when not
1594                  * setting times to past, but it is necessary due to possible
1595                  * time de-synchronization between MDT inode and OST objects */
1596                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1597         }
1598
1599         /* If the file was restored, it needs to set dirty flag.
1600          *
1601          * We've already sent MDS_DATA_MODIFIED flag in
1602          * ll_md_setattr() for truncate. However, the MDT refuses to
1603          * set the HS_DIRTY flag on released files, so we have to set
1604          * it again if the file has been restored. Please check how
1605          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1606          *
1607          * Please notice that if the file is not released, the previous
1608          * MDS_DATA_MODIFIED has taken effect and usually
1609          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1610          * This way we can save an RPC for common open + trunc
1611          * operation. */
1612         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1613                 struct hsm_state_set hss = {
1614                         .hss_valid = HSS_SETMASK,
1615                         .hss_setmask = HS_DIRTY,
1616                 };
1617                 int rc2;
1618
1619                 rc2 = ll_hsm_state_set(inode, &hss);
1620                 /* truncate and write can happen at the same time, so that
1621                  * the file can be set modified even though the file is not
1622                  * restored from released state, and ll_hsm_state_set() is
1623                  * not applicable for the file, and rc2 < 0 is normal in this
1624                  * case. */
1625                 if (rc2 < 0)
1626                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1627                                PFID(ll_inode2fid(inode)), rc2);
1628         }
1629
1630         EXIT;
1631 out:
1632         if (op_data != NULL)
1633                 ll_finish_md_op_data(op_data);
1634
1635         if (S_ISREG(inode->i_mode)) {
1636                 inode_lock(inode);
1637                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1638                         inode_dio_wait(inode);
1639         }
1640
1641         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1642                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1643
1644         return rc;
1645 }
1646
1647 int ll_setattr(struct dentry *de, struct iattr *attr)
1648 {
1649         int mode = de->d_inode->i_mode;
1650
1651         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1652                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1653                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1654
1655         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1656                                (ATTR_SIZE|ATTR_MODE)) &&
1657             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1658              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1659               !(attr->ia_mode & S_ISGID))))
1660                 attr->ia_valid |= ATTR_FORCE;
1661
1662         if ((attr->ia_valid & ATTR_MODE) &&
1663             (mode & S_ISUID) &&
1664             !(attr->ia_mode & S_ISUID) &&
1665             !(attr->ia_valid & ATTR_KILL_SUID))
1666                 attr->ia_valid |= ATTR_KILL_SUID;
1667
1668         if ((attr->ia_valid & ATTR_MODE) &&
1669             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1670             !(attr->ia_mode & S_ISGID) &&
1671             !(attr->ia_valid & ATTR_KILL_SGID))
1672                 attr->ia_valid |= ATTR_KILL_SGID;
1673
1674         /* avoid polluted from ATTR_TIMES_SET,
1675          * projid is not expected to be set here */
1676         attr->ia_valid &= ~MDS_ATTR_PROJID;
1677
1678         return ll_setattr_raw(de, attr, false);
1679 }
1680
1681 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1682                        __u64 max_age, __u32 flags)
1683 {
1684         struct ll_sb_info *sbi = ll_s2sbi(sb);
1685         struct obd_statfs obd_osfs;
1686         int rc;
1687         ENTRY;
1688
1689         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1690         if (rc) {
1691                 CERROR("md_statfs fails: rc = %d\n", rc);
1692                 RETURN(rc);
1693         }
1694
1695         osfs->os_type = sb->s_magic;
1696
1697         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1698                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1699
1700         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1701                 flags |= OBD_STATFS_NODELAY;
1702
1703         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1704         if (rc) {
1705                 CERROR("obd_statfs fails: rc = %d\n", rc);
1706                 RETURN(rc);
1707         }
1708
1709         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1710                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1711                obd_osfs.os_files);
1712
1713         osfs->os_bsize = obd_osfs.os_bsize;
1714         osfs->os_blocks = obd_osfs.os_blocks;
1715         osfs->os_bfree = obd_osfs.os_bfree;
1716         osfs->os_bavail = obd_osfs.os_bavail;
1717
1718         /* If we don't have as many objects free on the OST as inodes
1719          * on the MDS, we reduce the total number of inodes to
1720          * compensate, so that the "inodes in use" number is correct.
1721          */
1722         if (obd_osfs.os_ffree < osfs->os_ffree) {
1723                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1724                         obd_osfs.os_ffree;
1725                 osfs->os_ffree = obd_osfs.os_ffree;
1726         }
1727
1728         RETURN(rc);
1729 }
1730 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1731 {
1732         struct super_block *sb = de->d_sb;
1733         struct obd_statfs osfs;
1734         __u64 fsid = huge_encode_dev(sb->s_dev);
1735         int rc;
1736
1737         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1738         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1739
1740         /* Some amount of caching on the client is allowed */
1741         rc = ll_statfs_internal(sb, &osfs,
1742                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1743                                 0);
1744         if (rc)
1745                 return rc;
1746
1747         statfs_unpack(sfs, &osfs);
1748
1749         /* We need to downshift for all 32-bit kernels, because we can't
1750          * tell if the kernel is being called via sys_statfs64() or not.
1751          * Stop before overflowing f_bsize - in which case it is better
1752          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1753         if (sizeof(long) < 8) {
1754                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1755                         sfs->f_bsize <<= 1;
1756
1757                         osfs.os_blocks >>= 1;
1758                         osfs.os_bfree >>= 1;
1759                         osfs.os_bavail >>= 1;
1760                 }
1761         }
1762
1763         sfs->f_blocks = osfs.os_blocks;
1764         sfs->f_bfree = osfs.os_bfree;
1765         sfs->f_bavail = osfs.os_bavail;
1766         sfs->f_fsid.val[0] = (__u32)fsid;
1767         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1768         return 0;
1769 }
1770
1771 void ll_inode_size_lock(struct inode *inode)
1772 {
1773         struct ll_inode_info *lli;
1774
1775         LASSERT(!S_ISDIR(inode->i_mode));
1776
1777         lli = ll_i2info(inode);
1778         mutex_lock(&lli->lli_size_mutex);
1779 }
1780
1781 void ll_inode_size_unlock(struct inode *inode)
1782 {
1783         struct ll_inode_info *lli;
1784
1785         lli = ll_i2info(inode);
1786         mutex_unlock(&lli->lli_size_mutex);
1787 }
1788
1789 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1790 {
1791         struct ll_inode_info *lli = ll_i2info(inode);
1792         struct mdt_body *body = md->body;
1793         struct ll_sb_info *sbi = ll_i2sbi(inode);
1794
1795         if (body->mbo_valid & OBD_MD_FLEASIZE)
1796                 cl_file_inode_init(inode, md);
1797
1798         if (S_ISDIR(inode->i_mode)) {
1799                 int     rc;
1800
1801                 rc = ll_update_lsm_md(inode, md);
1802                 if (rc != 0)
1803                         return rc;
1804         }
1805
1806 #ifdef CONFIG_FS_POSIX_ACL
1807         if (body->mbo_valid & OBD_MD_FLACL) {
1808                 spin_lock(&lli->lli_lock);
1809                 if (lli->lli_posix_acl)
1810                         posix_acl_release(lli->lli_posix_acl);
1811                 lli->lli_posix_acl = md->posix_acl;
1812                 spin_unlock(&lli->lli_lock);
1813         }
1814 #endif
1815         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1816                                         sbi->ll_flags & LL_SBI_32BIT_API);
1817         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1818
1819         if (body->mbo_valid & OBD_MD_FLATIME) {
1820                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1821                         LTIME_S(inode->i_atime) = body->mbo_atime;
1822                 lli->lli_atime = body->mbo_atime;
1823         }
1824
1825         if (body->mbo_valid & OBD_MD_FLMTIME) {
1826                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1827                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1828                                "to %llu\n", inode->i_ino,
1829                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1830                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1831                 }
1832                 lli->lli_mtime = body->mbo_mtime;
1833         }
1834
1835         if (body->mbo_valid & OBD_MD_FLCTIME) {
1836                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1837                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1838                 lli->lli_ctime = body->mbo_ctime;
1839         }
1840
1841         if (body->mbo_valid & OBD_MD_FLMODE)
1842                 inode->i_mode = (inode->i_mode & S_IFMT) |
1843                                 (body->mbo_mode & ~S_IFMT);
1844
1845         if (body->mbo_valid & OBD_MD_FLTYPE)
1846                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1847                                 (body->mbo_mode & S_IFMT);
1848
1849         LASSERT(inode->i_mode != 0);
1850         if (S_ISREG(inode->i_mode))
1851                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1852                                        LL_MAX_BLKSIZE_BITS);
1853         else
1854                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1855
1856         if (body->mbo_valid & OBD_MD_FLUID)
1857                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1858         if (body->mbo_valid & OBD_MD_FLGID)
1859                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1860         if (body->mbo_valid & OBD_MD_FLPROJID)
1861                 lli->lli_projid = body->mbo_projid;
1862         if (body->mbo_valid & OBD_MD_FLFLAGS)
1863                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1864         if (body->mbo_valid & OBD_MD_FLNLINK)
1865                 set_nlink(inode, body->mbo_nlink);
1866         if (body->mbo_valid & OBD_MD_FLRDEV)
1867                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1868
1869         if (body->mbo_valid & OBD_MD_FLID) {
1870                 /* FID shouldn't be changed! */
1871                 if (fid_is_sane(&lli->lli_fid)) {
1872                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1873                                  "Trying to change FID "DFID
1874                                  " to the "DFID", inode "DFID"(%p)\n",
1875                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1876                                  PFID(ll_inode2fid(inode)), inode);
1877                 } else {
1878                         lli->lli_fid = body->mbo_fid1;
1879                 }
1880         }
1881
1882         LASSERT(fid_seq(&lli->lli_fid) != 0);
1883
1884         if (body->mbo_valid & OBD_MD_FLSIZE) {
1885                 i_size_write(inode, body->mbo_size);
1886
1887                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1888                        PFID(ll_inode2fid(inode)),
1889                        (unsigned long long)body->mbo_size);
1890
1891                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1892                         inode->i_blocks = body->mbo_blocks;
1893         }
1894
1895         if (body->mbo_valid & OBD_MD_TSTATE) {
1896                 /* Set LLIF_FILE_RESTORING if restore ongoing and
1897                  * clear it when done to ensure to start again
1898                  * glimpsing updated attrs
1899                  */
1900                 if (body->mbo_t_state & MS_RESTORE)
1901                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1902                 else
1903                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1904         }
1905
1906         return 0;
1907 }
1908
1909 int ll_read_inode2(struct inode *inode, void *opaque)
1910 {
1911         struct lustre_md *md = opaque;
1912         struct ll_inode_info *lli = ll_i2info(inode);
1913         int     rc;
1914         ENTRY;
1915
1916         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1917                PFID(&lli->lli_fid), inode);
1918
1919         /* Core attributes from the MDS first.  This is a new inode, and
1920          * the VFS doesn't zero times in the core inode so we have to do
1921          * it ourselves.  They will be overwritten by either MDS or OST
1922          * attributes - we just need to make sure they aren't newer. */
1923         LTIME_S(inode->i_mtime) = 0;
1924         LTIME_S(inode->i_atime) = 0;
1925         LTIME_S(inode->i_ctime) = 0;
1926         inode->i_rdev = 0;
1927         rc = ll_update_inode(inode, md);
1928         if (rc != 0)
1929                 RETURN(rc);
1930
1931         /* OIDEBUG(inode); */
1932
1933 #ifdef HAVE_BACKING_DEV_INFO
1934         /* initializing backing dev info. */
1935         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1936 #endif
1937         if (S_ISREG(inode->i_mode)) {
1938                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1939                 inode->i_op = &ll_file_inode_operations;
1940                 inode->i_fop = sbi->ll_fop;
1941                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1942                 EXIT;
1943         } else if (S_ISDIR(inode->i_mode)) {
1944                 inode->i_op = &ll_dir_inode_operations;
1945                 inode->i_fop = &ll_dir_operations;
1946                 EXIT;
1947         } else if (S_ISLNK(inode->i_mode)) {
1948                 inode->i_op = &ll_fast_symlink_inode_operations;
1949                 EXIT;
1950         } else {
1951                 inode->i_op = &ll_special_inode_operations;
1952
1953                 init_special_inode(inode, inode->i_mode,
1954                                    inode->i_rdev);
1955
1956                 EXIT;
1957         }
1958
1959         return 0;
1960 }
1961
1962 void ll_delete_inode(struct inode *inode)
1963 {
1964         struct ll_inode_info *lli = ll_i2info(inode);
1965         ENTRY;
1966
1967         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1968                 /* It is last chance to write out dirty pages,
1969                  * otherwise we may lose data while umount */
1970                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
1971
1972         truncate_inode_pages_final(&inode->i_data);
1973
1974         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
1975                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
1976                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
1977
1978 #ifdef HAVE_SBOPS_EVICT_INODE
1979         ll_clear_inode(inode);
1980 #endif
1981         clear_inode(inode);
1982
1983         EXIT;
1984 }
1985
1986 int ll_iocontrol(struct inode *inode, struct file *file,
1987                  unsigned int cmd, unsigned long arg)
1988 {
1989         struct ll_sb_info *sbi = ll_i2sbi(inode);
1990         struct ptlrpc_request *req = NULL;
1991         int rc, flags = 0;
1992         ENTRY;
1993
1994         switch(cmd) {
1995         case FSFILT_IOC_GETFLAGS: {
1996                 struct mdt_body *body;
1997                 struct md_op_data *op_data;
1998
1999                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2000                                              0, 0, LUSTRE_OPC_ANY,
2001                                              NULL);
2002                 if (IS_ERR(op_data))
2003                         RETURN(PTR_ERR(op_data));
2004
2005                 op_data->op_valid = OBD_MD_FLFLAGS;
2006                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2007                 ll_finish_md_op_data(op_data);
2008                 if (rc) {
2009                         CERROR("%s: failure inode "DFID": rc = %d\n",
2010                                sbi->ll_md_exp->exp_obd->obd_name,
2011                                PFID(ll_inode2fid(inode)), rc);
2012                         RETURN(-abs(rc));
2013                 }
2014
2015                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2016
2017                 flags = body->mbo_flags;
2018
2019                 ptlrpc_req_finished(req);
2020
2021                 RETURN(put_user(flags, (int __user *)arg));
2022         }
2023         case FSFILT_IOC_SETFLAGS: {
2024                 struct iattr *attr;
2025                 struct md_op_data *op_data;
2026                 struct cl_object *obj;
2027
2028                 if (get_user(flags, (int __user *)arg))
2029                         RETURN(-EFAULT);
2030
2031                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2032                                              LUSTRE_OPC_ANY, NULL);
2033                 if (IS_ERR(op_data))
2034                         RETURN(PTR_ERR(op_data));
2035
2036                 op_data->op_attr_flags = flags;
2037                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2038                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2039                 ll_finish_md_op_data(op_data);
2040                 ptlrpc_req_finished(req);
2041                 if (rc)
2042                         RETURN(rc);
2043
2044                 inode->i_flags = ll_ext_to_inode_flags(flags);
2045
2046                 obj = ll_i2info(inode)->lli_clob;
2047                 if (obj == NULL)
2048                         RETURN(0);
2049
2050                 OBD_ALLOC_PTR(attr);
2051                 if (attr == NULL)
2052                         RETURN(-ENOMEM);
2053
2054                 attr->ia_valid = ATTR_ATTR_FLAG;
2055                 rc = cl_setattr_ost(obj, attr, flags);
2056
2057                 OBD_FREE_PTR(attr);
2058                 RETURN(rc);
2059         }
2060         default:
2061                 RETURN(-ENOSYS);
2062         }
2063
2064         RETURN(0);
2065 }
2066
2067 int ll_flush_ctx(struct inode *inode)
2068 {
2069         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2070
2071         CDEBUG(D_SEC, "flush context for user %d\n",
2072                from_kuid(&init_user_ns, current_uid()));
2073
2074         obd_set_info_async(NULL, sbi->ll_md_exp,
2075                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2076                            0, NULL, NULL);
2077         obd_set_info_async(NULL, sbi->ll_dt_exp,
2078                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2079                            0, NULL, NULL);
2080         return 0;
2081 }
2082
2083 /* umount -f client means force down, don't save state */
2084 void ll_umount_begin(struct super_block *sb)
2085 {
2086         struct ll_sb_info *sbi = ll_s2sbi(sb);
2087         struct obd_device *obd;
2088         struct obd_ioctl_data *ioc_data;
2089         struct l_wait_info lwi;
2090         wait_queue_head_t waitq;
2091         ENTRY;
2092
2093         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2094                sb->s_count, atomic_read(&sb->s_active));
2095
2096         obd = class_exp2obd(sbi->ll_md_exp);
2097         if (obd == NULL) {
2098                 CERROR("Invalid MDC connection handle %#llx\n",
2099                        sbi->ll_md_exp->exp_handle.h_cookie);
2100                 EXIT;
2101                 return;
2102         }
2103         obd->obd_force = 1;
2104
2105         obd = class_exp2obd(sbi->ll_dt_exp);
2106         if (obd == NULL) {
2107                 CERROR("Invalid LOV connection handle %#llx\n",
2108                        sbi->ll_dt_exp->exp_handle.h_cookie);
2109                 EXIT;
2110                 return;
2111         }
2112         obd->obd_force = 1;
2113
2114         OBD_ALLOC_PTR(ioc_data);
2115         if (ioc_data) {
2116                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2117                               sizeof *ioc_data, ioc_data, NULL);
2118
2119                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2120                               sizeof *ioc_data, ioc_data, NULL);
2121
2122                 OBD_FREE_PTR(ioc_data);
2123         }
2124
2125         /* Really, we'd like to wait until there are no requests outstanding,
2126          * and then continue.  For now, we just periodically checking for vfs
2127          * to decrement mnt_cnt and hope to finish it within 10sec.
2128          */
2129         init_waitqueue_head(&waitq);
2130         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2131                                    cfs_time_seconds(1), NULL, NULL);
2132         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2133
2134         EXIT;
2135 }
2136
2137 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2138 {
2139         struct ll_sb_info *sbi = ll_s2sbi(sb);
2140         char *profilenm = get_profile_name(sb);
2141         int err;
2142         __u32 read_only;
2143
2144         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2145                 read_only = *flags & MS_RDONLY;
2146                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2147                                          sizeof(KEY_READ_ONLY),
2148                                          KEY_READ_ONLY, sizeof(read_only),
2149                                          &read_only, NULL);
2150                 if (err) {
2151                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2152                                       profilenm, read_only ?
2153                                       "read-only" : "read-write", err);
2154                         return err;
2155                 }
2156
2157                 if (read_only)
2158                         sb->s_flags |= MS_RDONLY;
2159                 else
2160                         sb->s_flags &= ~MS_RDONLY;
2161
2162                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2163                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2164                                       read_only ?  "read-only" : "read-write");
2165         }
2166         return 0;
2167 }
2168
2169 /**
2170  * Cleanup the open handle that is cached on MDT-side.
2171  *
2172  * For open case, the client side open handling thread may hit error
2173  * after the MDT grant the open. Under such case, the client should
2174  * send close RPC to the MDT as cleanup; otherwise, the open handle
2175  * on the MDT will be leaked there until the client umount or evicted.
2176  *
2177  * In further, if someone unlinked the file, because the open handle
2178  * holds the reference on such file/object, then it will block the
2179  * subsequent threads that want to locate such object via FID.
2180  *
2181  * \param[in] sb        super block for this file-system
2182  * \param[in] open_req  pointer to the original open request
2183  */
2184 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2185 {
2186         struct mdt_body                 *body;
2187         struct md_op_data               *op_data;
2188         struct ptlrpc_request           *close_req = NULL;
2189         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2190         ENTRY;
2191
2192         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2193         OBD_ALLOC_PTR(op_data);
2194         if (op_data == NULL) {
2195                 CWARN("%s: cannot allocate op_data to release open handle for "
2196                       DFID"\n",
2197                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2198
2199                 RETURN_EXIT;
2200         }
2201
2202         op_data->op_fid1 = body->mbo_fid1;
2203         op_data->op_handle = body->mbo_handle;
2204         op_data->op_mod_time = ktime_get_real_seconds();
2205         md_close(exp, op_data, NULL, &close_req);
2206         ptlrpc_req_finished(close_req);
2207         ll_finish_md_op_data(op_data);
2208
2209         EXIT;
2210 }
2211
2212 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2213                   struct super_block *sb, struct lookup_intent *it)
2214 {
2215         struct ll_sb_info *sbi = NULL;
2216         struct lustre_md md = { NULL };
2217         int rc;
2218         ENTRY;
2219
2220         LASSERT(*inode || sb);
2221         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2222         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2223                               sbi->ll_md_exp, &md);
2224         if (rc != 0)
2225                 GOTO(cleanup, rc);
2226
2227         if (*inode) {
2228                 rc = ll_update_inode(*inode, &md);
2229                 if (rc != 0)
2230                         GOTO(out, rc);
2231         } else {
2232                 LASSERT(sb != NULL);
2233
2234                 /*
2235                  * At this point server returns to client's same fid as client
2236                  * generated for creating. So using ->fid1 is okay here.
2237                  */
2238                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2239                         CERROR("%s: Fid is insane "DFID"\n",
2240                                 ll_get_fsname(sb, NULL, 0),
2241                                 PFID(&md.body->mbo_fid1));
2242                         GOTO(out, rc = -EINVAL);
2243                 }
2244
2245                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2246                                              sbi->ll_flags & LL_SBI_32BIT_API),
2247                                  &md);
2248                 if (IS_ERR(*inode)) {
2249 #ifdef CONFIG_FS_POSIX_ACL
2250                         if (md.posix_acl) {
2251                                 posix_acl_release(md.posix_acl);
2252                                 md.posix_acl = NULL;
2253                         }
2254 #endif
2255                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2256                         *inode = NULL;
2257                         CERROR("new_inode -fatal: rc %d\n", rc);
2258                         GOTO(out, rc);
2259                 }
2260         }
2261
2262         /* Handling piggyback layout lock.
2263          * Layout lock can be piggybacked by getattr and open request.
2264          * The lsm can be applied to inode only if it comes with a layout lock
2265          * otherwise correct layout may be overwritten, for example:
2266          * 1. proc1: mdt returns a lsm but not granting layout
2267          * 2. layout was changed by another client
2268          * 3. proc2: refresh layout and layout lock granted
2269          * 4. proc1: to apply a stale layout */
2270         if (it != NULL && it->it_lock_mode != 0) {
2271                 struct lustre_handle lockh;
2272                 struct ldlm_lock *lock;
2273
2274                 lockh.cookie = it->it_lock_handle;
2275                 lock = ldlm_handle2lock(&lockh);
2276                 LASSERT(lock != NULL);
2277                 if (ldlm_has_layout(lock)) {
2278                         struct cl_object_conf conf;
2279
2280                         memset(&conf, 0, sizeof(conf));
2281                         conf.coc_opc = OBJECT_CONF_SET;
2282                         conf.coc_inode = *inode;
2283                         conf.coc_lock = lock;
2284                         conf.u.coc_layout = md.layout;
2285                         (void)ll_layout_conf(*inode, &conf);
2286                 }
2287                 LDLM_LOCK_PUT(lock);
2288         }
2289
2290         GOTO(out, rc = 0);
2291
2292 out:
2293         md_free_lustre_md(sbi->ll_md_exp, &md);
2294
2295 cleanup:
2296         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2297                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2298
2299         return rc;
2300 }
2301
2302 int ll_obd_statfs(struct inode *inode, void __user *arg)
2303 {
2304         struct ll_sb_info *sbi = NULL;
2305         struct obd_export *exp;
2306         char *buf = NULL;
2307         struct obd_ioctl_data *data = NULL;
2308         __u32 type;
2309         int len = 0, rc;
2310
2311         if (!inode || !(sbi = ll_i2sbi(inode)))
2312                 GOTO(out_statfs, rc = -EINVAL);
2313
2314         rc = obd_ioctl_getdata(&buf, &len, arg);
2315         if (rc)
2316                 GOTO(out_statfs, rc);
2317
2318         data = (void*)buf;
2319         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2320             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2321                 GOTO(out_statfs, rc = -EINVAL);
2322
2323         if (data->ioc_inllen1 != sizeof(__u32) ||
2324             data->ioc_inllen2 != sizeof(__u32) ||
2325             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2326             data->ioc_plen2 != sizeof(struct obd_uuid))
2327                 GOTO(out_statfs, rc = -EINVAL);
2328
2329         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2330         if (type & LL_STATFS_LMV)
2331                 exp = sbi->ll_md_exp;
2332         else if (type & LL_STATFS_LOV)
2333                 exp = sbi->ll_dt_exp;
2334         else
2335                 GOTO(out_statfs, rc = -ENODEV);
2336
2337         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2338         if (rc)
2339                 GOTO(out_statfs, rc);
2340 out_statfs:
2341         OBD_FREE_LARGE(buf, len);
2342         return rc;
2343 }
2344
2345 int ll_process_config(struct lustre_cfg *lcfg)
2346 {
2347         struct super_block *sb;
2348         unsigned long x;
2349         int rc = 0;
2350         char *ptr;
2351
2352         /* The instance name contains the sb: lustre-client-aacfe000 */
2353         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2354         if (!ptr || !*(++ptr))
2355                 return -EINVAL;
2356         if (sscanf(ptr, "%lx", &x) != 1)
2357                 return -EINVAL;
2358         sb = (struct super_block *)x;
2359         /* This better be a real Lustre superblock! */
2360         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2361
2362         /* Note we have not called client_common_fill_super yet, so
2363            proc fns must be able to handle that! */
2364         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2365                                       lcfg, sb);
2366         if (rc > 0)
2367                 rc = 0;
2368         return rc;
2369 }
2370
2371 /* this function prepares md_op_data hint for passing it down to MD stack. */
2372 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2373                                       struct inode *i1, struct inode *i2,
2374                                       const char *name, size_t namelen,
2375                                       __u32 mode, __u32 opc, void *data)
2376 {
2377         LASSERT(i1 != NULL);
2378
2379         if (name == NULL) {
2380                 /* Do not reuse namelen for something else. */
2381                 if (namelen != 0)
2382                         return ERR_PTR(-EINVAL);
2383         } else {
2384                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2385                         return ERR_PTR(-ENAMETOOLONG);
2386
2387                 if (!lu_name_is_valid_2(name, namelen))
2388                         return ERR_PTR(-EINVAL);
2389         }
2390
2391         if (op_data == NULL)
2392                 OBD_ALLOC_PTR(op_data);
2393
2394         if (op_data == NULL)
2395                 return ERR_PTR(-ENOMEM);
2396
2397         ll_i2gids(op_data->op_suppgids, i1, i2);
2398         op_data->op_fid1 = *ll_inode2fid(i1);
2399         op_data->op_default_stripe_offset = -1;
2400         if (S_ISDIR(i1->i_mode)) {
2401                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2402                 if (opc == LUSTRE_OPC_MKDIR)
2403                         op_data->op_default_stripe_offset =
2404                                    ll_i2info(i1)->lli_def_stripe_offset;
2405         }
2406
2407         if (i2) {
2408                 op_data->op_fid2 = *ll_inode2fid(i2);
2409                 if (S_ISDIR(i2->i_mode))
2410                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2411         } else {
2412                 fid_zero(&op_data->op_fid2);
2413         }
2414
2415         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2416                 op_data->op_cli_flags |= CLI_HASH64;
2417
2418         if (ll_need_32bit_api(ll_i2sbi(i1)))
2419                 op_data->op_cli_flags |= CLI_API32;
2420
2421         op_data->op_name = name;
2422         op_data->op_namelen = namelen;
2423         op_data->op_mode = mode;
2424         op_data->op_mod_time = cfs_time_current_sec();
2425         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2426         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2427         op_data->op_cap = cfs_curproc_cap_pack();
2428         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2429              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2430                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2431         } else {
2432                 op_data->op_mds = 0;
2433         }
2434         op_data->op_data = data;
2435
2436         return op_data;
2437 }
2438
2439 void ll_finish_md_op_data(struct md_op_data *op_data)
2440 {
2441         security_release_secctx(op_data->op_file_secctx,
2442                                 op_data->op_file_secctx_size);
2443         OBD_FREE_PTR(op_data);
2444 }
2445
2446 #ifdef HAVE_SUPEROPS_USE_DENTRY
2447 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2448 #else
2449 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2450 #endif
2451 {
2452         struct ll_sb_info *sbi;
2453
2454 #ifdef HAVE_SUPEROPS_USE_DENTRY
2455         LASSERT((seq != NULL) && (dentry != NULL));
2456         sbi = ll_s2sbi(dentry->d_sb);
2457 #else
2458         LASSERT((seq != NULL) && (vfs != NULL));
2459         sbi = ll_s2sbi(vfs->mnt_sb);
2460 #endif
2461
2462         if (sbi->ll_flags & LL_SBI_NOLCK)
2463                 seq_puts(seq, ",nolock");
2464
2465         if (sbi->ll_flags & LL_SBI_FLOCK)
2466                 seq_puts(seq, ",flock");
2467
2468         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2469                 seq_puts(seq, ",localflock");
2470
2471         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2472                 seq_puts(seq, ",user_xattr");
2473
2474         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2475                 seq_puts(seq, ",lazystatfs");
2476
2477         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2478                 seq_puts(seq, ",user_fid2path");
2479
2480         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2481                 seq_puts(seq, ",always_ping");
2482
2483         RETURN(0);
2484 }
2485
2486 /**
2487  * Get obd name by cmd, and copy out to user space
2488  */
2489 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2490 {
2491         struct ll_sb_info *sbi = ll_i2sbi(inode);
2492         struct obd_device *obd;
2493         ENTRY;
2494
2495         if (cmd == OBD_IOC_GETDTNAME)
2496                 obd = class_exp2obd(sbi->ll_dt_exp);
2497         else if (cmd == OBD_IOC_GETMDNAME)
2498                 obd = class_exp2obd(sbi->ll_md_exp);
2499         else
2500                 RETURN(-EINVAL);
2501
2502         if (!obd)
2503                 RETURN(-ENOENT);
2504
2505         if (copy_to_user((void __user *)arg, obd->obd_name,
2506                          strlen(obd->obd_name) + 1))
2507                 RETURN(-EFAULT);
2508
2509         RETURN(0);
2510 }
2511
2512 /**
2513  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2514  * fsname will be returned in this buffer; otherwise, a static buffer will be
2515  * used to store the fsname and returned to caller.
2516  */
2517 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2518 {
2519         static char fsname_static[MTI_NAME_MAXLEN];
2520         struct lustre_sb_info *lsi = s2lsi(sb);
2521         char *ptr;
2522         int len;
2523
2524         if (buf == NULL) {
2525                 /* this means the caller wants to use static buffer
2526                  * and it doesn't care about race. Usually this is
2527                  * in error reporting path */
2528                 buf = fsname_static;
2529                 buflen = sizeof(fsname_static);
2530         }
2531
2532         len = strlen(lsi->lsi_lmd->lmd_profile);
2533         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2534         if (ptr && (strcmp(ptr, "-client") == 0))
2535                 len -= 7;
2536
2537         if (unlikely(len >= buflen))
2538                 len = buflen - 1;
2539         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2540         buf[len] = '\0';
2541
2542         return buf;
2543 }
2544
2545 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2546 {
2547         char *path = NULL;
2548
2549         struct path p;
2550
2551         p.dentry = dentry;
2552         p.mnt = current->fs->root.mnt;
2553         path_get(&p);
2554         path = d_path(&p, buf, bufsize);
2555         path_put(&p);
2556         return path;
2557 }
2558
2559 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2560 {
2561         char *buf, *path = NULL;
2562         struct dentry *dentry = NULL;
2563         struct inode *inode = page->mapping->host;
2564
2565         /* this can be called inside spin lock so use GFP_ATOMIC. */
2566         buf = (char *)__get_free_page(GFP_ATOMIC);
2567         if (buf != NULL) {
2568                 dentry = d_find_alias(page->mapping->host);
2569                 if (dentry != NULL)
2570                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2571         }
2572
2573         CDEBUG(D_WARNING,
2574                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2575                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2576                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2577                PFID(ll_inode2fid(inode)),
2578                (path && !IS_ERR(path)) ? path : "", ioret);
2579
2580         if (dentry != NULL)
2581                 dput(dentry);
2582
2583         if (buf != NULL)
2584                 free_page((unsigned long)buf);
2585 }
2586
2587 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2588                         struct lov_user_md **kbuf)
2589 {
2590         struct lov_user_md      lum;
2591         ssize_t                 lum_size;
2592         ENTRY;
2593
2594         if (copy_from_user(&lum, md, sizeof(lum)))
2595                 RETURN(-EFAULT);
2596
2597         lum_size = ll_lov_user_md_size(&lum);
2598         if (lum_size < 0)
2599                 RETURN(lum_size);
2600
2601         OBD_ALLOC(*kbuf, lum_size);
2602         if (*kbuf == NULL)
2603                 RETURN(-ENOMEM);
2604
2605         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2606                 OBD_FREE(*kbuf, lum_size);
2607                 RETURN(-EFAULT);
2608         }
2609
2610         RETURN(lum_size);
2611 }
2612
2613 /*
2614  * Compute llite root squash state after a change of root squash
2615  * configuration setting or add/remove of a lnet nid
2616  */
2617 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2618 {
2619         struct root_squash_info *squash = &sbi->ll_squash;
2620         int i;
2621         bool matched;
2622         struct lnet_process_id id;
2623
2624         /* Update norootsquash flag */
2625         down_write(&squash->rsi_sem);
2626         if (list_empty(&squash->rsi_nosquash_nids))
2627                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2628         else {
2629                 /* Do not apply root squash as soon as one of our NIDs is
2630                  * in the nosquash_nids list */
2631                 matched = false;
2632                 i = 0;
2633                 while (LNetGetId(i++, &id) != -ENOENT) {
2634                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2635                                 continue;
2636                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2637                                 matched = true;
2638                                 break;
2639                         }
2640                 }
2641                 if (matched)
2642                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2643                 else
2644                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2645         }
2646         up_write(&squash->rsi_sem);
2647 }
2648
2649 /**
2650  * Parse linkea content to extract information about a given hardlink
2651  *
2652  * \param[in]   ldata      - Initialized linkea data
2653  * \param[in]   linkno     - Link identifier
2654  * \param[out]  parent_fid - The entry's parent FID
2655  * \param[out]  ln         - Entry name destination buffer
2656  *
2657  * \retval 0 on success
2658  * \retval Appropriate negative error code on failure
2659  */
2660 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2661                             struct lu_fid *parent_fid, struct lu_name *ln)
2662 {
2663         unsigned int    idx;
2664         int             rc;
2665         ENTRY;
2666
2667         rc = linkea_init_with_rec(ldata);
2668         if (rc < 0)
2669                 RETURN(rc);
2670
2671         if (linkno >= ldata->ld_leh->leh_reccount)
2672                 /* beyond last link */
2673                 RETURN(-ENODATA);
2674
2675         linkea_first_entry(ldata);
2676         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2677                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2678                                     parent_fid);
2679                 if (idx == linkno)
2680                         break;
2681
2682                 linkea_next_entry(ldata);
2683         }
2684
2685         if (idx < linkno)
2686                 RETURN(-ENODATA);
2687
2688         RETURN(0);
2689 }
2690
2691 /**
2692  * Get parent FID and name of an identified link. Operation is performed for
2693  * a given link number, letting the caller iterate over linkno to list one or
2694  * all links of an entry.
2695  *
2696  * \param[in]     file - File descriptor against which to perform the operation
2697  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2698  *                       on and the available size. It is eventually filled with
2699  *                       the requested information or left untouched on error
2700  *
2701  * \retval - 0 on success
2702  * \retval - Appropriate negative error code on failure
2703  */
2704 int ll_getparent(struct file *file, struct getparent __user *arg)
2705 {
2706         struct dentry           *dentry = file_dentry(file);
2707         struct inode            *inode = file_inode(file);
2708         struct linkea_data      *ldata;
2709         struct lu_buf            buf = LU_BUF_NULL;
2710         struct lu_name           ln;
2711         struct lu_fid            parent_fid;
2712         __u32                    linkno;
2713         __u32                    name_size;
2714         int                      rc;
2715
2716         ENTRY;
2717
2718         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2719             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2720                 RETURN(-EPERM);
2721
2722         if (get_user(name_size, &arg->gp_name_size))
2723                 RETURN(-EFAULT);
2724
2725         if (get_user(linkno, &arg->gp_linkno))
2726                 RETURN(-EFAULT);
2727
2728         if (name_size > PATH_MAX)
2729                 RETURN(-EINVAL);
2730
2731         OBD_ALLOC(ldata, sizeof(*ldata));
2732         if (ldata == NULL)
2733                 RETURN(-ENOMEM);
2734
2735         rc = linkea_data_new(ldata, &buf);
2736         if (rc < 0)
2737                 GOTO(ldata_free, rc);
2738
2739         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2740         if (rc < 0)
2741                 GOTO(lb_free, rc);
2742
2743         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2744         if (rc < 0)
2745                 GOTO(lb_free, rc);
2746
2747         if (ln.ln_namelen >= name_size)
2748                 GOTO(lb_free, rc = -EOVERFLOW);
2749
2750         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2751                 GOTO(lb_free, rc = -EFAULT);
2752
2753         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2754                 GOTO(lb_free, rc = -EFAULT);
2755
2756         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2757                 GOTO(lb_free, rc = -EFAULT);
2758
2759 lb_free:
2760         lu_buf_free(&buf);
2761 ldata_free:
2762         OBD_FREE(ldata, sizeof(*ldata));
2763
2764         RETURN(rc);
2765 }