lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/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/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 <uapi/linux/lustre/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         sbi->ll_statfs_max_age = OBD_STATFS_CACHE_SECONDS;
  88
  89         si_meminfo(&si);
  90         pages = si.totalram - si.totalhigh;
  91         lru_page_max = pages / 2;
  92
  93         /* initialize ll_cache data */
  94         sbi->ll_cache = cl_cache_init(lru_page_max);
  95         if (sbi->ll_cache == NULL) {
  96                 OBD_FREE(sbi, sizeof(*sbi));
  97                 RETURN(NULL);
  98         }
  99
 100         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 101                                            SBI_DEFAULT_READAHEAD_MAX);
 102         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 103         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 104
 105         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 #ifdef ENABLE_FLOCK
 114         sbi->ll_flags |= LL_SBI_FLOCK;
 115 #endif
 116
 117 #ifdef HAVE_LRU_RESIZE_SUPPORT
 118         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 119 #endif
 120         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 121
 122         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 123                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 124                                pp_r_hist.oh_lock);
 125                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 126                                pp_w_hist.oh_lock);
 127         }
 128
 129         /* metadata statahead is enabled by default */
 130         sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
 131         sbi->ll_sa_max = LL_SA_RPC_DEF;
 132         atomic_set(&sbi->ll_sa_total, 0);
 133         atomic_set(&sbi->ll_sa_wrong, 0);
 134         atomic_set(&sbi->ll_sa_running, 0);
 135         atomic_set(&sbi->ll_agl_total, 0);
 136         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 137         sbi->ll_flags |= LL_SBI_FAST_READ;
 138         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 139
 140         /* root squash */
 141         sbi->ll_squash.rsi_uid = 0;
 142         sbi->ll_squash.rsi_gid = 0;
 143         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 144         init_rwsem(&sbi->ll_squash.rsi_sem);
 145
 146         RETURN(sbi);
 147 }
 148
 149 static void ll_free_sbi(struct super_block *sb)
 150 {
 151         struct ll_sb_info *sbi = ll_s2sbi(sb);
 152         ENTRY;
 153
 154         if (sbi != NULL) {
 155                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 156                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 157                 if (sbi->ll_cache != NULL) {
 158                         cl_cache_decref(sbi->ll_cache);
 159                         sbi->ll_cache = NULL;
 160                 }
 161                 OBD_FREE(sbi, sizeof(*sbi));
 162         }
 163         EXIT;
 164 }
 165
 166 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 167                                     struct vfsmount *mnt)
 168 {
 169         struct inode *root = NULL;
 170         struct ll_sb_info *sbi = ll_s2sbi(sb);
 171         struct obd_statfs *osfs = NULL;
 172         struct ptlrpc_request *request = NULL;
 173         struct obd_connect_data *data = NULL;
 174         struct obd_uuid *uuid;
 175         struct md_op_data *op_data;
 176         struct lustre_md lmd;
 177         u64 valid;
 178         int size, err, checksum;
 179
 180         ENTRY;
 181         sbi->ll_md_obd = class_name2obd(md);
 182         if (!sbi->ll_md_obd) {
 183                 CERROR("MD %s: not setup or attached\n", md);
 184                 RETURN(-EINVAL);
 185         }
 186
 187         OBD_ALLOC_PTR(data);
 188         if (data == NULL)
 189                 RETURN(-ENOMEM);
 190
 191         OBD_ALLOC_PTR(osfs);
 192         if (osfs == NULL) {
 193                 OBD_FREE_PTR(data);
 194                 RETURN(-ENOMEM);
 195         }
 196
 197         /* pass client page size via ocd_grant_blkbits, the server should report
 198          * back its backend blocksize for grant calculation purpose */
 199         data->ocd_grant_blkbits = PAGE_SHIFT;
 200
 201         /* indicate MDT features supported by this client */
 202         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 203                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 204                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 205                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 206                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 207                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 208                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 209                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 210                                   OBD_CONNECT_64BITHASH |
 211                                   OBD_CONNECT_EINPROGRESS |
 212                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 213                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 214                                   OBD_CONNECT_MAX_EASIZE |
 215                                   OBD_CONNECT_FLOCK_DEAD |
 216                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 217                                   OBD_CONNECT_OPEN_BY_FID |
 218                                   OBD_CONNECT_DIR_STRIPE |
 219                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 220                                   OBD_CONNECT_SUBTREE |
 221                                   OBD_CONNECT_MULTIMODRPCS |
 222                                   OBD_CONNECT_GRANT_PARAM |
 223                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 224
 225         data->ocd_connect_flags2 = OBD_CONNECT2_FLR |
 226                                    OBD_CONNECT2_LOCK_CONVERT |
 227                                    OBD_CONNECT2_DIR_MIGRATE |
 228                                    OBD_CONNECT2_SUM_STATFS |
 229                                    OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 230                                    OBD_CONNECT2_LSOM |
 231                                    OBD_CONNECT2_ASYNC_DISCARD;
 232
 233 #ifdef HAVE_LRU_RESIZE_SUPPORT
 234         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 235                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 236 #endif
 237 #ifdef CONFIG_FS_POSIX_ACL
 238         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 239                                    OBD_CONNECT_LARGE_ACL;
 240 #endif
 241
 242         data->ocd_cksum_types = obd_cksum_types_supported_client();
 243
 244         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 245                 /* flag mdc connection as lightweight, only used for test
 246                  * purpose, use with care */
 247                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 248
 249         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 250         data->ocd_version = LUSTRE_VERSION_CODE;
 251
 252         if (sb->s_flags & MS_RDONLY)
 253                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 254         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 255                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 256
 257 #ifdef MS_NOSEC
 258         /* Setting this indicates we correctly support S_NOSEC (See kernel
 259          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 260          */
 261         sb->s_flags |= MS_NOSEC;
 262 #endif
 263
 264         if (sbi->ll_flags & LL_SBI_FLOCK)
 265                 sbi->ll_fop = &ll_file_operations_flock;
 266         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 267                 sbi->ll_fop = &ll_file_operations;
 268         else
 269                 sbi->ll_fop = &ll_file_operations_noflock;
 270
 271         /* always ping even if server suppress_pings */
 272         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 273                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 274
 275         obd_connect_set_secctx(data);
 276
 277 #if defined(CONFIG_SECURITY)
 278         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 279 #endif
 280
 281         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 282
 283         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 284                           &sbi->ll_sb_uuid, data, NULL);
 285         if (err == -EBUSY) {
 286                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 287                                    "recovery, of which this client is not a "
 288                                    "part. Please wait for recovery to complete,"
 289                                    " abort, or time out.\n", md);
 290                 GOTO(out, err);
 291         } else if (err) {
 292                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 293                 GOTO(out, err);
 294         }
 295
 296         sbi->ll_md_exp->exp_connect_data = *data;
 297
 298         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 299                            LUSTRE_SEQ_METADATA);
 300         if (err) {
 301                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 302                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 303                 GOTO(out_md, err);
 304         }
 305
 306         /* For mount, we only need fs info from MDT0, and also in DNE, it
 307          * can make sure the client can be mounted as long as MDT0 is
 308          * avaible */
 309         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 310                         ktime_get_seconds() - sbi->ll_statfs_max_age,
 311                         OBD_STATFS_FOR_MDT0);
 312         if (err)
 313                 GOTO(out_md_fid, err);
 314
 315         /* This needs to be after statfs to ensure connect has finished.
 316          * Note that "data" does NOT contain the valid connect reply.
 317          * If connecting to a 1.8 server there will be no LMV device, so
 318          * we can access the MDC export directly and exp_connect_flags will
 319          * be non-zero, but if accessing an upgraded 2.1 server it will
 320          * have the correct flags filled in.
 321          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 322         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 323         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 324             valid != CLIENT_CONNECT_MDT_REQD) {
 325                 char *buf;
 326
 327                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 328                 obd_connect_flags2str(buf, PAGE_SIZE,
 329                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 330                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 331                                    "feature(s) needed for correct operation "
 332                                    "of this client (%s). Please upgrade "
 333                                    "server or downgrade client.\n",
 334                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 335                 OBD_FREE(buf, PAGE_SIZE);
 336                 GOTO(out_md_fid, err = -EPROTO);
 337         }
 338
 339         size = sizeof(*data);
 340         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 341                            KEY_CONN_DATA,  &size, data);
 342         if (err) {
 343                 CERROR("%s: Get connect data failed: rc = %d\n",
 344                        sbi->ll_md_exp->exp_obd->obd_name, err);
 345                 GOTO(out_md_fid, err);
 346         }
 347
 348         LASSERT(osfs->os_bsize);
 349         sb->s_blocksize = osfs->os_bsize;
 350         sb->s_blocksize_bits = log2(osfs->os_bsize);
 351         sb->s_magic = LL_SUPER_MAGIC;
 352         sb->s_maxbytes = MAX_LFS_FILESIZE;
 353         sbi->ll_namelen = osfs->os_namelen;
 354         sbi->ll_mnt.mnt = current->fs->root.mnt;
 355
 356         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 357             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 358                 LCONSOLE_INFO("Disabling user_xattr feature because "
 359                               "it is not supported on the server\n");
 360                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 361         }
 362
 363         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 364 #ifdef MS_POSIXACL
 365                 sb->s_flags |= MS_POSIXACL;
 366 #endif
 367                 sbi->ll_flags |= LL_SBI_ACL;
 368         } else {
 369                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 370 #ifdef MS_POSIXACL
 371                 sb->s_flags &= ~MS_POSIXACL;
 372 #endif
 373                 sbi->ll_flags &= ~LL_SBI_ACL;
 374         }
 375
 376         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 377                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 378
 379         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 380                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 381
 382         if (obd_connect_has_secctx(data))
 383                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 384
 385         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 386                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 387                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 388                                       "unknown maximum xattr size.\n", dt);
 389                 } else if (!sbi->ll_xattr_cache_set) {
 390                         /* If xattr_cache is already set (no matter 0 or 1)
 391                          * during processing llog, it won't be enabled here. */
 392                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 393                         sbi->ll_xattr_cache_enabled = 1;
 394                 }
 395         }
 396
 397         sbi->ll_dt_obd = class_name2obd(dt);
 398         if (!sbi->ll_dt_obd) {
 399                 CERROR("DT %s: not setup or attached\n", dt);
 400                 GOTO(out_md_fid, err = -ENODEV);
 401         }
 402
 403         /* pass client page size via ocd_grant_blkbits, the server should report
 404          * back its backend blocksize for grant calculation purpose */
 405         data->ocd_grant_blkbits = PAGE_SHIFT;
 406
 407         /* indicate OST features supported by this client */
 408         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 409                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 410                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 411                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 412                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 413                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 414                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 415                                   OBD_CONNECT_EINPROGRESS |
 416                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 417                                   OBD_CONNECT_LAYOUTLOCK |
 418                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 419                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 420                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 421
 422 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 423  * can interoperate with an older version of lockahead which was released prior
 424  * to landing in master. This support will be dropped when 2.13 development
 425  * starts.  At the point, we should not just drop the connect flag (below), we
 426  * should also remove the support in the code.
 427  *
 428  * Removing it means a few things:
 429  * 1. Remove this section here
 430  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 431  * 3. Remove function exp_connect_lockahead_old
 432  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 433  * */
 434 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 435         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 436 #endif
 437
 438         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
 439
 440         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 441                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 442
 443         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 444          * disabled by default, because it can still be enabled on the
 445          * fly via /sys. As a consequence, we still need to come to an
 446          * agreement on the supported algorithms at connect time
 447          */
 448         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 449
 450         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 451                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 452         else
 453                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 454
 455 #ifdef HAVE_LRU_RESIZE_SUPPORT
 456         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 457 #endif
 458         /* always ping even if server suppress_pings */
 459         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 460                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 461
 462         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 463                "ocd_grant: %d\n", data->ocd_connect_flags,
 464                data->ocd_version, data->ocd_grant);
 465
 466         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 467         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 468
 469         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 470
 471         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 472                           &sbi->ll_sb_uuid, data, NULL);
 473         if (err == -EBUSY) {
 474                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 475                                    "recovery, of which this client is not a "
 476                                    "part.  Please wait for recovery to "
 477                                    "complete, abort, or time out.\n", dt);
 478                 GOTO(out_md, err);
 479         } else if (err) {
 480                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 481                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 482                 GOTO(out_md, err);
 483         }
 484
 485         sbi->ll_dt_exp->exp_connect_data = *data;
 486
 487         /* Don't change value if it was specified in the config log */
 488         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
 489                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 490                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 491                               (data->ocd_brw_size >> PAGE_SHIFT));
 492                 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
 493                     sbi->ll_ra_info.ra_max_pages_per_file)
 494                         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 495                                 sbi->ll_ra_info.ra_max_pages_per_file;
 496         }
 497
 498         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 499                            LUSTRE_SEQ_METADATA);
 500         if (err) {
 501                 CERROR("%s: Can't init data layer FID infrastructure, "
 502                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 503                 GOTO(out_dt, err);
 504         }
 505
 506         mutex_lock(&sbi->ll_lco.lco_lock);
 507         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 508         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 509         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 510         mutex_unlock(&sbi->ll_lco.lco_lock);
 511
 512         fid_zero(&sbi->ll_root_fid);
 513         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 514                            &sbi->ll_root_fid);
 515         if (err) {
 516                 CERROR("cannot mds_connect: rc = %d\n", err);
 517                 GOTO(out_lock_cn_cb, err);
 518         }
 519         if (!fid_is_sane(&sbi->ll_root_fid)) {
 520                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 521                        sbi->ll_md_exp->exp_obd->obd_name,
 522                        PFID(&sbi->ll_root_fid));
 523                 GOTO(out_lock_cn_cb, err = -EINVAL);
 524         }
 525         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 526
 527         sb->s_op = &lustre_super_operations;
 528 #ifdef HAVE_XATTR_HANDLER_FLAGS
 529         sb->s_xattr = ll_xattr_handlers;
 530 #endif
 531 #if THREAD_SIZE >= 8192 /*b=17630*/
 532         sb->s_export_op = &lustre_export_operations;
 533 #endif
 534
 535         /* make root inode
 536          * XXX: move this to after cbd setup? */
 537         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 538         if (sbi->ll_flags & LL_SBI_ACL)
 539                 valid |= OBD_MD_FLACL;
 540
 541         OBD_ALLOC_PTR(op_data);
 542         if (op_data == NULL)
 543                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 544
 545         op_data->op_fid1 = sbi->ll_root_fid;
 546         op_data->op_mode = 0;
 547         op_data->op_valid = valid;
 548
 549         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 550
 551         OBD_FREE_PTR(op_data);
 552         if (err) {
 553                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 554                        sbi->ll_md_exp->exp_obd->obd_name, err);
 555                 GOTO(out_lock_cn_cb, err);
 556         }
 557
 558         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 559                                sbi->ll_md_exp, &lmd);
 560         if (err) {
 561                 CERROR("failed to understand root inode md: rc = %d\n", err);
 562                 ptlrpc_req_finished(request);
 563                 GOTO(out_lock_cn_cb, err);
 564         }
 565
 566         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 567         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 568                                             sbi->ll_flags & LL_SBI_32BIT_API),
 569                        &lmd);
 570         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 571         ptlrpc_req_finished(request);
 572
 573         if (IS_ERR(root)) {
 574 #ifdef CONFIG_FS_POSIX_ACL
 575                 if (lmd.posix_acl) {
 576                         posix_acl_release(lmd.posix_acl);
 577                         lmd.posix_acl = NULL;
 578                 }
 579 #endif
 580                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 581                 root = NULL;
 582                 CERROR("lustre_lite: bad iget4 for root\n");
 583                 GOTO(out_root, err);
 584         }
 585
 586         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 587         if (sbi->ll_checksum_set) {
 588                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 589                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 590                                          sizeof(checksum), &checksum, NULL);
 591                 if (err) {
 592                         CERROR("%s: Set checksum failed: rc = %d\n",
 593                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 594                         GOTO(out_root, err);
 595                 }
 596         }
 597         cl_sb_init(sb);
 598
 599         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 600                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 601                                  sbi->ll_cache, NULL);
 602         if (err) {
 603                 CERROR("%s: Set cache_set failed: rc = %d\n",
 604                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 605                 GOTO(out_root, err);
 606         }
 607
 608         sb->s_root = d_make_root(root);
 609         if (sb->s_root == NULL) {
 610                 CERROR("%s: can't make root dentry\n",
 611                         ll_get_fsname(sb, NULL, 0));
 612                 GOTO(out_root, err = -ENOMEM);
 613         }
 614 #ifdef HAVE_DCACHE_LOCK
 615         sb->s_root->d_op = &ll_d_ops;
 616 #endif
 617
 618         sbi->ll_sdev_orig = sb->s_dev;
 619
 620         /* We set sb->s_dev equal on all lustre clients in order to support
 621          * NFS export clustering.  NFSD requires that the FSID be the same
 622          * on all clients. */
 623         /* s_dev is also used in lt_compare() to compare two fs, but that is
 624          * only a node-local comparison. */
 625         uuid = obd_get_uuid(sbi->ll_md_exp);
 626         if (uuid != NULL)
 627                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 628
 629         if (data != NULL)
 630                 OBD_FREE_PTR(data);
 631         if (osfs != NULL)
 632                 OBD_FREE_PTR(osfs);
 633
 634         if (sbi->ll_dt_obd) {
 635                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 636                                         &sbi->ll_dt_obd->obd_kset.kobj,
 637                                         sbi->ll_dt_obd->obd_type->typ_name);
 638                 if (err < 0) {
 639                         CERROR("%s: could not register %s in llite: rc = %d\n",
 640                                dt, ll_get_fsname(sb, NULL, 0), err);
 641                         err = 0;
 642                 }
 643         }
 644
 645         if (sbi->ll_md_obd) {
 646                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 647                                         &sbi->ll_md_obd->obd_kset.kobj,
 648                                         sbi->ll_md_obd->obd_type->typ_name);
 649                 if (err < 0) {
 650                         CERROR("%s: could not register %s in llite: rc = %d\n",
 651                                md, ll_get_fsname(sb, NULL, 0), err);
 652                         err = 0;
 653                 }
 654         }
 655
 656         RETURN(err);
 657 out_root:
 658         if (root)
 659                 iput(root);
 660 out_lock_cn_cb:
 661         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 662 out_dt:
 663         obd_disconnect(sbi->ll_dt_exp);
 664         sbi->ll_dt_exp = NULL;
 665         sbi->ll_dt_obd = NULL;
 666 out_md_fid:
 667         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 668 out_md:
 669         obd_disconnect(sbi->ll_md_exp);
 670         sbi->ll_md_exp = NULL;
 671         sbi->ll_md_obd = NULL;
 672 out:
 673         if (data != NULL)
 674                 OBD_FREE_PTR(data);
 675         if (osfs != NULL)
 676                 OBD_FREE_PTR(osfs);
 677         return err;
 678 }
 679
 680 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 681 {
 682         int size, rc;
 683
 684         size = sizeof(*lmmsize);
 685         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 686                           KEY_MAX_EASIZE, &size, lmmsize);
 687         if (rc != 0) {
 688                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 689                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 690                 RETURN(rc);
 691         }
 692
 693         size = sizeof(int);
 694         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 695                           KEY_MAX_EASIZE, &size, lmmsize);
 696         if (rc)
 697                 CERROR("Get max mdsize error rc %d\n", rc);
 698
 699         RETURN(rc);
 700 }
 701
 702 /**
 703  * Get the value of the default_easize parameter.
 704  *
 705  * \see client_obd::cl_default_mds_easize
 706  *
 707  * \param[in] sbi       superblock info for this filesystem
 708  * \param[out] lmmsize  pointer to storage location for value
 709  *
 710  * \retval 0            on success
 711  * \retval negative     negated errno on failure
 712  */
 713 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 714 {
 715         int size, rc;
 716
 717         size = sizeof(int);
 718         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 719                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 720         if (rc)
 721                 CERROR("Get default mdsize error rc %d\n", rc);
 722
 723         RETURN(rc);
 724 }
 725
 726 /**
 727  * Set the default_easize parameter to the given value.
 728  *
 729  * \see client_obd::cl_default_mds_easize
 730  *
 731  * \param[in] sbi       superblock info for this filesystem
 732  * \param[in] lmmsize   the size to set
 733  *
 734  * \retval 0            on success
 735  * \retval negative     negated errno on failure
 736  */
 737 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 738 {
 739         int rc;
 740
 741         if (lmmsize < sizeof(struct lov_mds_md) ||
 742             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 743                 return -EINVAL;
 744
 745         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 746                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 747                                 sizeof(int), &lmmsize, NULL);
 748
 749         RETURN(rc);
 750 }
 751
 752 static void client_common_put_super(struct super_block *sb)
 753 {
 754         struct ll_sb_info *sbi = ll_s2sbi(sb);
 755         ENTRY;
 756
 757         cl_sb_fini(sb);
 758
 759         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 760         obd_disconnect(sbi->ll_dt_exp);
 761         sbi->ll_dt_exp = NULL;
 762
 763         ll_debugfs_unregister_super(sb);
 764
 765         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 766         obd_disconnect(sbi->ll_md_exp);
 767         sbi->ll_md_exp = NULL;
 768
 769         EXIT;
 770 }
 771
 772 void ll_kill_super(struct super_block *sb)
 773 {
 774         struct ll_sb_info *sbi;
 775         ENTRY;
 776
 777         /* not init sb ?*/
 778         if (!(sb->s_flags & MS_ACTIVE))
 779                 return;
 780
 781         sbi = ll_s2sbi(sb);
 782         /* we need restore s_dev from changed for clustred NFS before put_super
 783          * because new kernels have cached s_dev and change sb->s_dev in
 784          * put_super not affected real removing devices */
 785         if (sbi) {
 786                 sb->s_dev = sbi->ll_sdev_orig;
 787                 sbi->ll_umounting = 1;
 788
 789                 /* wait running statahead threads to quit */
 790                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 791                         set_current_state(TASK_UNINTERRUPTIBLE);
 792                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 793                 }
 794         }
 795
 796         EXIT;
 797 }
 798
 799 static inline int ll_set_opt(const char *opt, char *data, int fl)
 800 {
 801         if (strncmp(opt, data, strlen(opt)) != 0)
 802                 return 0;
 803         else
 804                 return fl;
 805 }
 806
 807 /* non-client-specific mount options are parsed in lmd_parse */
 808 static int ll_options(char *options, struct ll_sb_info *sbi)
 809 {
 810         int tmp;
 811         char *s1 = options, *s2;
 812         int *flags = &sbi->ll_flags;
 813         ENTRY;
 814
 815         if (!options)
 816                 RETURN(0);
 817
 818         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 819
 820         while (*s1) {
 821                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 822                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 823                 if (tmp) {
 824                         *flags |= tmp;
 825                         goto next;
 826                 }
 827                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 828                 if (tmp) {
 829                         *flags = (*flags & ~LL_SBI_LOCALFLOCK) | tmp;
 830                         goto next;
 831                 }
 832                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 833                 if (tmp) {
 834                         *flags = (*flags & ~LL_SBI_FLOCK) | tmp;
 835                         goto next;
 836                 }
 837                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 838                 if (tmp) {
 839                         *flags &= ~tmp;
 840                         goto next;
 841                 }
 842                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 843                 if (tmp) {
 844                         *flags |= tmp;
 845                         goto next;
 846                 }
 847                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 848                 if (tmp) {
 849                         *flags &= ~tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("context", s1, 1);
 853                 if (tmp)
 854                         goto next;
 855                 tmp = ll_set_opt("fscontext", s1, 1);
 856                 if (tmp)
 857                         goto next;
 858                 tmp = ll_set_opt("defcontext", s1, 1);
 859                 if (tmp)
 860                         goto next;
 861                 tmp = ll_set_opt("rootcontext", s1, 1);
 862                 if (tmp)
 863                         goto next;
 864                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 870                 if (tmp) {
 871                         *flags &= ~tmp;
 872                         goto next;
 873                 }
 874
 875                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 876                 if (tmp) {
 877                         *flags |= tmp;
 878                         sbi->ll_checksum_set = 1;
 879                         goto next;
 880                 }
 881                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 882                 if (tmp) {
 883                         *flags &= ~tmp;
 884                         sbi->ll_checksum_set = 1;
 885                         goto next;
 886                 }
 887                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 888                 if (tmp) {
 889                         *flags |= tmp;
 890                         goto next;
 891                 }
 892                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 893                 if (tmp) {
 894                         *flags &= ~tmp;
 895                         goto next;
 896                 }
 897                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 898                 if (tmp) {
 899                         *flags |= tmp;
 900                         goto next;
 901                 }
 902                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 903                 if (tmp) {
 904                         *flags &= ~tmp;
 905                         goto next;
 906                 }
 907                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 908                 if (tmp) {
 909                         *flags |= tmp;
 910                         goto next;
 911                 }
 912                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 913                 if (tmp) {
 914                         *flags |= tmp;
 915                         goto next;
 916                 }
 917                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 918                 if (tmp) {
 919                         *flags &= ~tmp;
 920                         goto next;
 921                 }
 922                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 923                 if (tmp) {
 924                         *flags |= tmp;
 925                         goto next;
 926                 }
 927                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 928                                    s1);
 929                 RETURN(-EINVAL);
 930
 931 next:
 932                 /* Find next opt */
 933                 s2 = strchr(s1, ',');
 934                 if (s2 == NULL)
 935                         break;
 936                 s1 = s2 + 1;
 937         }
 938         RETURN(0);
 939 }
 940
 941 void ll_lli_init(struct ll_inode_info *lli)
 942 {
 943         lli->lli_inode_magic = LLI_INODE_MAGIC;
 944         lli->lli_flags = 0;
 945         spin_lock_init(&lli->lli_lock);
 946         lli->lli_posix_acl = NULL;
 947         /* Do not set lli_fid, it has been initialized already. */
 948         fid_zero(&lli->lli_pfid);
 949         lli->lli_mds_read_och = NULL;
 950         lli->lli_mds_write_och = NULL;
 951         lli->lli_mds_exec_och = NULL;
 952         lli->lli_open_fd_read_count = 0;
 953         lli->lli_open_fd_write_count = 0;
 954         lli->lli_open_fd_exec_count = 0;
 955         mutex_init(&lli->lli_och_mutex);
 956         spin_lock_init(&lli->lli_agl_lock);
 957         spin_lock_init(&lli->lli_layout_lock);
 958         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 959         lli->lli_clob = NULL;
 960
 961         init_rwsem(&lli->lli_xattrs_list_rwsem);
 962         mutex_init(&lli->lli_xattrs_enq_lock);
 963
 964         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 965         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 966                 mutex_init(&lli->lli_readdir_mutex);
 967                 lli->lli_opendir_key = NULL;
 968                 lli->lli_sai = NULL;
 969                 spin_lock_init(&lli->lli_sa_lock);
 970                 lli->lli_opendir_pid = 0;
 971                 lli->lli_sa_enabled = 0;
 972                 lli->lli_def_stripe_offset = -1;
 973                 init_rwsem(&lli->lli_lsm_sem);
 974         } else {
 975                 mutex_init(&lli->lli_size_mutex);
 976                 lli->lli_symlink_name = NULL;
 977                 init_rwsem(&lli->lli_trunc_sem);
 978                 range_lock_tree_init(&lli->lli_write_tree);
 979                 init_rwsem(&lli->lli_glimpse_sem);
 980                 lli->lli_glimpse_time = ktime_set(0, 0);
 981                 INIT_LIST_HEAD(&lli->lli_agl_list);
 982                 lli->lli_agl_index = 0;
 983                 lli->lli_async_rc = 0;
 984         }
 985         mutex_init(&lli->lli_layout_mutex);
 986         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
 987 }
 988
 989 #define MAX_STRING_SIZE 128
 990
 991 #ifndef HAVE_SUPER_SETUP_BDI_NAME
 992
 993 #define LSI_BDI_INITIALIZED     0x00400000
 994
 995 #ifndef HAVE_BDI_CAP_MAP_COPY
 996 # define BDI_CAP_MAP_COPY       0
 997 #endif
 998
 999 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1000 {
1001         struct  lustre_sb_info *lsi = s2lsi(sb);
1002         char buf[MAX_STRING_SIZE];
1003         va_list args;
1004         int err;
1005
1006         err = bdi_init(&lsi->lsi_bdi);
1007         if (err)
1008                 return err;
1009
1010         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1011         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1012         lsi->lsi_bdi.name = "lustre";
1013         va_start(args, fmt);
1014         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1015         va_end(args);
1016         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1017         va_end(args);
1018         if (!err)
1019                 sb->s_bdi = &lsi->lsi_bdi;
1020
1021         return err;
1022 }
1023 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1024
1025 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
1026 {
1027         struct  lustre_profile *lprof = NULL;
1028         struct  lustre_sb_info *lsi = s2lsi(sb);
1029         struct  ll_sb_info *sbi = NULL;
1030         char    *dt = NULL, *md = NULL;
1031         char    *profilenm = get_profile_name(sb);
1032         struct config_llog_instance *cfg;
1033         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1034         const int instlen = 16 + 2;
1035         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1036         char name[MAX_STRING_SIZE];
1037         int md_len = 0;
1038         int dt_len = 0;
1039         char *ptr;
1040         int len;
1041         int err;
1042
1043         ENTRY;
1044         /* for ASLR, to map between cfg_instance and hashed ptr */
1045         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1046                profilenm, cfg_instance, sb);
1047
1048         try_module_get(THIS_MODULE);
1049
1050         OBD_ALLOC_PTR(cfg);
1051         if (cfg == NULL)
1052                 GOTO(out_free_cfg, err = -ENOMEM);
1053
1054         /* client additional sb info */
1055         lsi->lsi_llsbi = sbi = ll_init_sbi();
1056         if (!sbi)
1057                 GOTO(out_free_cfg, err = -ENOMEM);
1058
1059         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1060         if (err)
1061                 GOTO(out_free_cfg, err);
1062
1063         err = super_setup_bdi_name(sb, "lustre-%016lx", cfg_instance);
1064         if (err)
1065                 GOTO(out_free_cfg, err);
1066
1067 #ifndef HAVE_DCACHE_LOCK
1068         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1069         sb->s_d_op = &ll_d_ops;
1070 #endif
1071         /* Get fsname */
1072         len = strlen(profilenm);
1073         ptr = strrchr(profilenm, '-');
1074         if (ptr && (strcmp(ptr, "-client") == 0))
1075                 len -= 7;
1076
1077         /* Mount info */
1078         snprintf(name, MAX_STRING_SIZE, "%.*s-%016lx", len,
1079                  profilenm, cfg_instance);
1080
1081         /* Call ll_debugfs_register_super() before lustre_process_log()
1082          * so that "llite.*.*" params can be processed correctly.
1083          */
1084         err = ll_debugfs_register_super(sb, name);
1085         if (err < 0) {
1086                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1087                        ll_get_fsname(sb, NULL, 0), err);
1088                 err = 0;
1089         }
1090
1091         /* The cfg_instance is a value unique to this super, in case some
1092          * joker tries to mount the same fs at two mount points.
1093          */
1094         cfg->cfg_instance = cfg_instance;
1095         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1096         cfg->cfg_callback = class_config_llog_handler;
1097         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1098         /* set up client obds */
1099         err = lustre_process_log(sb, profilenm, cfg);
1100         if (err < 0)
1101                 GOTO(out_debugfs, err);
1102
1103         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1104         lprof = class_get_profile(profilenm);
1105         if (lprof == NULL) {
1106                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1107                                    " read from the MGS.  Does that filesystem "
1108                                    "exist?\n", profilenm);
1109                 GOTO(out_debugfs, err = -EINVAL);
1110         }
1111         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1112                lprof->lp_md, lprof->lp_dt);
1113
1114         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1115         OBD_ALLOC(dt, dt_len);
1116         if (!dt)
1117                 GOTO(out_profile, err = -ENOMEM);
1118         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1119
1120         md_len = strlen(lprof->lp_md) + instlen + 2;
1121         OBD_ALLOC(md, md_len);
1122         if (!md)
1123                 GOTO(out_free_dt, err = -ENOMEM);
1124         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1125
1126         /* connections, registrations, sb setup */
1127         err = client_common_fill_super(sb, md, dt, mnt);
1128         if (err < 0)
1129                 GOTO(out_free_md, err);
1130
1131         sbi->ll_client_common_fill_super_succeeded = 1;
1132
1133 out_free_md:
1134         if (md)
1135                 OBD_FREE(md, md_len);
1136 out_free_dt:
1137         if (dt)
1138                 OBD_FREE(dt, dt_len);
1139 out_profile:
1140         if (lprof)
1141                 class_put_profile(lprof);
1142 out_debugfs:
1143         if (err < 0)
1144                 ll_debugfs_unregister_super(sb);
1145 out_free_cfg:
1146         if (cfg)
1147                 OBD_FREE_PTR(cfg);
1148
1149         if (err)
1150                 ll_put_super(sb);
1151         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1152                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1153         RETURN(err);
1154 } /* ll_fill_super */
1155
1156 void ll_put_super(struct super_block *sb)
1157 {
1158         struct config_llog_instance cfg, params_cfg;
1159         struct obd_device *obd;
1160         struct lustre_sb_info *lsi = s2lsi(sb);
1161         struct ll_sb_info *sbi = ll_s2sbi(sb);
1162         char *profilenm = get_profile_name(sb);
1163         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1164         long ccc_count;
1165         int next, force = 1, rc = 0;
1166         ENTRY;
1167
1168         if (!sbi)
1169                 GOTO(out_no_sbi, 0);
1170
1171         /* Should replace instance_id with something better for ASLR */
1172         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1173                profilenm, cfg_instance, sb);
1174
1175         cfg.cfg_instance = cfg_instance;
1176         lustre_end_log(sb, profilenm, &cfg);
1177
1178         params_cfg.cfg_instance = cfg_instance;
1179         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1180
1181         if (sbi->ll_md_exp) {
1182                 obd = class_exp2obd(sbi->ll_md_exp);
1183                 if (obd)
1184                         force = obd->obd_force;
1185         }
1186
1187         /* Wait for unstable pages to be committed to stable storage */
1188         if (force == 0) {
1189                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1190                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1191                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1192                         &lwi);
1193         }
1194
1195         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1196         if (force == 0 && rc != -EINTR)
1197                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1198
1199         /* We need to set force before the lov_disconnect in
1200            lustre_common_put_super, since l_d cleans up osc's as well. */
1201         if (force) {
1202                 next = 0;
1203                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1204                                                      &next)) != NULL) {
1205                         obd->obd_force = force;
1206                 }
1207         }
1208
1209         if (sbi->ll_client_common_fill_super_succeeded) {
1210                 /* Only if client_common_fill_super succeeded */
1211                 client_common_put_super(sb);
1212         }
1213
1214         next = 0;
1215         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1216                 class_manual_cleanup(obd);
1217         }
1218
1219         if (sbi->ll_flags & LL_SBI_VERBOSE)
1220                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1221
1222         if (profilenm)
1223                 class_del_profile(profilenm);
1224
1225 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1226         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1227                 bdi_destroy(&lsi->lsi_bdi);
1228                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1229         }
1230 #endif
1231
1232         ll_free_sbi(sb);
1233         lsi->lsi_llsbi = NULL;
1234 out_no_sbi:
1235         lustre_common_put_super(sb);
1236
1237         cl_env_cache_purge(~0);
1238
1239         module_put(THIS_MODULE);
1240
1241         EXIT;
1242 } /* client_put_super */
1243
1244 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1245 {
1246         struct inode *inode = NULL;
1247
1248         /* NOTE: we depend on atomic igrab() -bzzz */
1249         lock_res_and_lock(lock);
1250         if (lock->l_resource->lr_lvb_inode) {
1251                 struct ll_inode_info * lli;
1252                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1253                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1254                         inode = igrab(lock->l_resource->lr_lvb_inode);
1255                 } else {
1256                         inode = lock->l_resource->lr_lvb_inode;
1257                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1258                                          D_WARNING, lock, "lr_lvb_inode %p is "
1259                                          "bogus: magic %08x",
1260                                          lock->l_resource->lr_lvb_inode,
1261                                          lli->lli_inode_magic);
1262                         inode = NULL;
1263                 }
1264         }
1265         unlock_res_and_lock(lock);
1266         return inode;
1267 }
1268
1269 void ll_dir_clear_lsm_md(struct inode *inode)
1270 {
1271         struct ll_inode_info *lli = ll_i2info(inode);
1272
1273         LASSERT(S_ISDIR(inode->i_mode));
1274
1275         if (lli->lli_lsm_md != NULL) {
1276                 lmv_free_memmd(lli->lli_lsm_md);
1277                 lli->lli_lsm_md = NULL;
1278         }
1279 }
1280
1281 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1282                                       const struct lu_fid *fid,
1283                                       struct lustre_md *md)
1284 {
1285         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1286         struct mdt_body         *body = md->body;
1287         struct inode            *inode;
1288         ino_t                   ino;
1289         ENTRY;
1290
1291         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1292         inode = iget_locked(sb, ino);
1293         if (inode == NULL) {
1294                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1295                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1296                 RETURN(ERR_PTR(-ENOENT));
1297         }
1298
1299         if (inode->i_state & I_NEW) {
1300                 struct ll_inode_info *lli = ll_i2info(inode);
1301                 struct lmv_stripe_md *lsm = md->lmv;
1302
1303                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1304                                 (body->mbo_mode & S_IFMT);
1305                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1306                          PFID(fid));
1307
1308                 inode->i_mtime.tv_sec = 0;
1309                 inode->i_atime.tv_sec = 0;
1310                 inode->i_ctime.tv_sec = 0;
1311                 inode->i_rdev = 0;
1312
1313 #ifdef HAVE_BACKING_DEV_INFO
1314                 /* initializing backing dev info. */
1315                 inode->i_mapping->backing_dev_info =
1316                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1317 #endif
1318                 inode->i_op = &ll_dir_inode_operations;
1319                 inode->i_fop = &ll_dir_operations;
1320                 lli->lli_fid = *fid;
1321                 ll_lli_init(lli);
1322
1323                 LASSERT(lsm != NULL);
1324                 /* master object FID */
1325                 lli->lli_pfid = body->mbo_fid1;
1326                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1327                        lli, PFID(fid), PFID(&lli->lli_pfid));
1328                 unlock_new_inode(inode);
1329         }
1330
1331         RETURN(inode);
1332 }
1333
1334 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1335 {
1336         struct lu_fid *fid;
1337         struct lmv_stripe_md *lsm = md->lmv;
1338         struct ll_inode_info *lli = ll_i2info(inode);
1339         int i;
1340
1341         LASSERT(lsm != NULL);
1342
1343         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1344                 ll_get_fsname(inode->i_sb, NULL, 0),
1345                 PFID(&lli->lli_fid));
1346         lsm_md_dump(D_INODE, lsm);
1347
1348         /* XXX sigh, this lsm_root initialization should be in
1349          * LMV layer, but it needs ll_iget right now, so we
1350          * put this here right now. */
1351         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1352                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1353                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1354
1355                 if (!fid_is_sane(fid))
1356                         continue;
1357
1358                 /* Unfortunately ll_iget will call ll_update_inode,
1359                  * where the initialization of slave inode is slightly
1360                  * different, so it reset lsm_md to NULL to avoid
1361                  * initializing lsm for slave inode. */
1362                 lsm->lsm_md_oinfo[i].lmo_root =
1363                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1364                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1365                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1366
1367                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1368                         while (i-- > 0) {
1369                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1370                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1371                         }
1372                         return rc;
1373                 }
1374         }
1375
1376         lli->lli_lsm_md = lsm;
1377
1378         return 0;
1379 }
1380
1381 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1382 {
1383         struct ll_inode_info *lli = ll_i2info(inode);
1384         struct lmv_stripe_md *lsm = md->lmv;
1385         struct cl_attr  *attr;
1386         int rc = 0;
1387
1388         ENTRY;
1389
1390         LASSERT(S_ISDIR(inode->i_mode));
1391         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1392                PFID(ll_inode2fid(inode)));
1393
1394         /*
1395          * no striped information from request, lustre_md from req does not
1396          * include stripeEA, see ll_md_setattr()
1397          */
1398         if (!lsm)
1399                 RETURN(0);
1400
1401         /*
1402          * normally dir layout doesn't change, only take read lock to check
1403          * that to avoid blocking other MD operations.
1404          */
1405         down_read(&lli->lli_lsm_sem);
1406
1407         /* some concurrent lookup initialized lsm, and unchanged */
1408         if (lli->lli_lsm_md && lsm_md_eq(lli->lli_lsm_md, lsm))
1409                 GOTO(unlock, rc = 0);
1410
1411         /* if dir layout doesn't match, check whether version is increased,
1412          * which means layout is changed, this happens in dir split/merge and
1413          * lfsck.
1414          */
1415         if (lli->lli_lsm_md &&
1416             lsm->lsm_md_layout_version <=
1417             lli->lli_lsm_md->lsm_md_layout_version) {
1418                 CERROR("%s: "DFID" dir layout mismatch:\n",
1419                        ll_get_fsname(inode->i_sb, NULL, 0),
1420                        PFID(&lli->lli_fid));
1421                 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1422                 lsm_md_dump(D_ERROR, lsm);
1423                 GOTO(unlock, rc = -EINVAL);
1424         }
1425
1426         up_read(&lli->lli_lsm_sem);
1427         down_write(&lli->lli_lsm_sem);
1428         /* clear existing lsm */
1429         if (lli->lli_lsm_md) {
1430                 lmv_free_memmd(lli->lli_lsm_md);
1431                 lli->lli_lsm_md = NULL;
1432         }
1433
1434         rc = ll_init_lsm_md(inode, md);
1435         up_write(&lli->lli_lsm_sem);
1436         if (rc)
1437                 RETURN(rc);
1438
1439         /* set md->lmv to NULL, so the following free lustre_md will not free
1440          * this lsm.
1441          */
1442         md->lmv = NULL;
1443
1444         /* md_merge_attr() may take long, since lsm is already set, switch to
1445          * read lock.
1446          */
1447         down_read(&lli->lli_lsm_sem);
1448         OBD_ALLOC_PTR(attr);
1449         if (!attr)
1450                 GOTO(unlock, rc = -ENOMEM);
1451
1452         /* validate the lsm */
1453         rc = md_merge_attr(ll_i2mdexp(inode), lli->lli_lsm_md, attr,
1454                            ll_md_blocking_ast);
1455         if (!rc) {
1456                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1457                         md->body->mbo_nlink = attr->cat_nlink;
1458                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1459                         md->body->mbo_size = attr->cat_size;
1460                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1461                         md->body->mbo_atime = attr->cat_atime;
1462                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1463                         md->body->mbo_ctime = attr->cat_ctime;
1464                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1465                         md->body->mbo_mtime = attr->cat_mtime;
1466         }
1467
1468         OBD_FREE_PTR(attr);
1469         GOTO(unlock, rc);
1470 unlock:
1471         up_read(&lli->lli_lsm_sem);
1472
1473         return rc;
1474 }
1475
1476 void ll_clear_inode(struct inode *inode)
1477 {
1478         struct ll_inode_info *lli = ll_i2info(inode);
1479         struct ll_sb_info *sbi = ll_i2sbi(inode);
1480         ENTRY;
1481
1482         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1483                PFID(ll_inode2fid(inode)), inode);
1484
1485         if (S_ISDIR(inode->i_mode)) {
1486                 /* these should have been cleared in ll_file_release */
1487                 LASSERT(lli->lli_opendir_key == NULL);
1488                 LASSERT(lli->lli_sai == NULL);
1489                 LASSERT(lli->lli_opendir_pid == 0);
1490         }
1491
1492         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1493
1494         LASSERT(!lli->lli_open_fd_write_count);
1495         LASSERT(!lli->lli_open_fd_read_count);
1496         LASSERT(!lli->lli_open_fd_exec_count);
1497
1498         if (lli->lli_mds_write_och)
1499                 ll_md_real_close(inode, FMODE_WRITE);
1500         if (lli->lli_mds_exec_och)
1501                 ll_md_real_close(inode, FMODE_EXEC);
1502         if (lli->lli_mds_read_och)
1503                 ll_md_real_close(inode, FMODE_READ);
1504
1505         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1506                 OBD_FREE(lli->lli_symlink_name,
1507                          strlen(lli->lli_symlink_name) + 1);
1508                 lli->lli_symlink_name = NULL;
1509         }
1510
1511         ll_xattr_cache_destroy(inode);
1512
1513 #ifdef CONFIG_FS_POSIX_ACL
1514         forget_all_cached_acls(inode);
1515         if (lli->lli_posix_acl) {
1516                 posix_acl_release(lli->lli_posix_acl);
1517                 lli->lli_posix_acl = NULL;
1518         }
1519 #endif
1520         lli->lli_inode_magic = LLI_INODE_DEAD;
1521
1522         if (S_ISDIR(inode->i_mode))
1523                 ll_dir_clear_lsm_md(inode);
1524         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1525                 LASSERT(list_empty(&lli->lli_agl_list));
1526
1527         /*
1528          * XXX This has to be done before lsm is freed below, because
1529          * cl_object still uses inode lsm.
1530          */
1531         cl_inode_fini(inode);
1532
1533         EXIT;
1534 }
1535
1536 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1537 {
1538         struct lustre_md md;
1539         struct inode *inode = dentry->d_inode;
1540         struct ll_sb_info *sbi = ll_i2sbi(inode);
1541         struct ptlrpc_request *request = NULL;
1542         int rc, ia_valid;
1543         ENTRY;
1544
1545         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1546                                      LUSTRE_OPC_ANY, NULL);
1547         if (IS_ERR(op_data))
1548                 RETURN(PTR_ERR(op_data));
1549
1550         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1551         if (rc) {
1552                 ptlrpc_req_finished(request);
1553                 if (rc == -ENOENT) {
1554                         clear_nlink(inode);
1555                         /* Unlinked special device node? Or just a race?
1556                          * Pretend we done everything. */
1557                         if (!S_ISREG(inode->i_mode) &&
1558                             !S_ISDIR(inode->i_mode)) {
1559                                 ia_valid = op_data->op_attr.ia_valid;
1560                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1561                                 rc = simple_setattr(dentry, &op_data->op_attr);
1562                                 op_data->op_attr.ia_valid = ia_valid;
1563                         }
1564                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1565                         CERROR("md_setattr fails: rc = %d\n", rc);
1566                 }
1567                 RETURN(rc);
1568         }
1569
1570         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1571                               sbi->ll_md_exp, &md);
1572         if (rc) {
1573                 ptlrpc_req_finished(request);
1574                 RETURN(rc);
1575         }
1576
1577         ia_valid = op_data->op_attr.ia_valid;
1578         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1579          * cache is not cleared yet. */
1580         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1581         if (S_ISREG(inode->i_mode))
1582                 inode_lock(inode);
1583         rc = simple_setattr(dentry, &op_data->op_attr);
1584         if (S_ISREG(inode->i_mode))
1585                 inode_unlock(inode);
1586         op_data->op_attr.ia_valid = ia_valid;
1587
1588         rc = ll_update_inode(inode, &md);
1589         ptlrpc_req_finished(request);
1590
1591         RETURN(rc);
1592 }
1593
1594 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1595  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1596  * keep these values until such a time that objects are allocated for it.
1597  * We do the MDS operations first, as it is checking permissions for us.
1598  * We don't to the MDS RPC if there is nothing that we want to store there,
1599  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1600  * going to do an RPC anyways.
1601  *
1602  * If we are doing a truncate, we will send the mtime and ctime updates
1603  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1604  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1605  * at the same time.
1606  *
1607  * In case of HSMimport, we only set attr on MDS.
1608  */
1609 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1610                    enum op_xvalid xvalid, bool hsm_import)
1611 {
1612         struct inode *inode = dentry->d_inode;
1613         struct ll_inode_info *lli = ll_i2info(inode);
1614         struct md_op_data *op_data = NULL;
1615         int rc = 0;
1616         ENTRY;
1617
1618         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1619                "valid %x, hsm_import %d\n",
1620                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1621                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1622                hsm_import);
1623
1624         if (attr->ia_valid & ATTR_SIZE) {
1625                 /* Check new size against VFS/VM file size limit and rlimit */
1626                 rc = inode_newsize_ok(inode, attr->ia_size);
1627                 if (rc)
1628                         RETURN(rc);
1629
1630                 /* The maximum Lustre file size is variable, based on the
1631                  * OST maximum object size and number of stripes.  This
1632                  * needs another check in addition to the VFS check above. */
1633                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1634                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1635                                PFID(&lli->lli_fid), attr->ia_size,
1636                                ll_file_maxbytes(inode));
1637                         RETURN(-EFBIG);
1638                 }
1639
1640                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1641         }
1642
1643         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1644         if (attr->ia_valid & TIMES_SET_FLAGS) {
1645                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1646                     !cfs_capable(CFS_CAP_FOWNER))
1647                         RETURN(-EPERM);
1648         }
1649
1650         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1651         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1652              (attr->ia_valid & ATTR_CTIME)) {
1653                 attr->ia_ctime = current_time(inode);
1654                 xvalid |= OP_XVALID_CTIME_SET;
1655         }
1656         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1657             (attr->ia_valid & ATTR_ATIME)) {
1658                 attr->ia_atime = current_time(inode);
1659                 attr->ia_valid |= ATTR_ATIME_SET;
1660         }
1661         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1662             (attr->ia_valid & ATTR_MTIME)) {
1663                 attr->ia_mtime = current_time(inode);
1664                 attr->ia_valid |= ATTR_MTIME_SET;
1665         }
1666
1667         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1668                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1669                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1670                        ktime_get_real_seconds());
1671
1672         if (S_ISREG(inode->i_mode)) {
1673                 if (attr->ia_valid & ATTR_SIZE)
1674                         inode_dio_write_done(inode);
1675                 inode_unlock(inode);
1676         }
1677
1678         /* We always do an MDS RPC, even if we're only changing the size;
1679          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1680
1681         OBD_ALLOC_PTR(op_data);
1682         if (op_data == NULL)
1683                 GOTO(out, rc = -ENOMEM);
1684
1685         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1686                 /* If we are changing file size, file content is
1687                  * modified, flag it.
1688                  */
1689                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1690                 op_data->op_bias |= MDS_DATA_MODIFIED;
1691                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1692         }
1693
1694         if (attr->ia_valid & ATTR_FILE) {
1695                 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1696
1697                 if (fd->fd_lease_och)
1698                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1699         }
1700
1701         op_data->op_attr = *attr;
1702         op_data->op_xvalid = xvalid;
1703
1704         rc = ll_md_setattr(dentry, op_data);
1705         if (rc)
1706                 GOTO(out, rc);
1707
1708         if (!S_ISREG(inode->i_mode) || hsm_import)
1709                 GOTO(out, rc = 0);
1710
1711         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1712                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1713             xvalid & OP_XVALID_CTIME_SET) {
1714                 /* For truncate and utimes sending attributes to OSTs, setting
1715                  * mtime/atime to the past will be performed under PW [0:EOF]
1716                  * extent lock (new_size:EOF for truncate).  It may seem
1717                  * excessive to send mtime/atime updates to OSTs when not
1718                  * setting times to past, but it is necessary due to possible
1719                  * time de-synchronization between MDT inode and OST objects
1720                  */
1721                 rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1722         }
1723
1724         /* If the file was restored, it needs to set dirty flag.
1725          *
1726          * We've already sent MDS_DATA_MODIFIED flag in
1727          * ll_md_setattr() for truncate. However, the MDT refuses to
1728          * set the HS_DIRTY flag on released files, so we have to set
1729          * it again if the file has been restored. Please check how
1730          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1731          *
1732          * Please notice that if the file is not released, the previous
1733          * MDS_DATA_MODIFIED has taken effect and usually
1734          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1735          * This way we can save an RPC for common open + trunc
1736          * operation. */
1737         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1738                 struct hsm_state_set hss = {
1739                         .hss_valid = HSS_SETMASK,
1740                         .hss_setmask = HS_DIRTY,
1741                 };
1742                 int rc2;
1743
1744                 rc2 = ll_hsm_state_set(inode, &hss);
1745                 /* truncate and write can happen at the same time, so that
1746                  * the file can be set modified even though the file is not
1747                  * restored from released state, and ll_hsm_state_set() is
1748                  * not applicable for the file, and rc2 < 0 is normal in this
1749                  * case. */
1750                 if (rc2 < 0)
1751                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1752                                PFID(ll_inode2fid(inode)), rc2);
1753         }
1754
1755         EXIT;
1756 out:
1757         if (op_data != NULL)
1758                 ll_finish_md_op_data(op_data);
1759
1760         if (S_ISREG(inode->i_mode)) {
1761                 inode_lock(inode);
1762                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1763                         inode_dio_wait(inode);
1764                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1765                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1766                  * inode flags, so there is a gap where S_NOSEC is not set.
1767                  * This can cause a writer to take the i_mutex unnecessarily,
1768                  * but this is safe to do and should be rare. */
1769                 inode_has_no_xattr(inode);
1770         }
1771
1772         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1773                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1774
1775         return rc;
1776 }
1777
1778 int ll_setattr(struct dentry *de, struct iattr *attr)
1779 {
1780         int mode = de->d_inode->i_mode;
1781         enum op_xvalid xvalid = 0;
1782
1783         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1784                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1785                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1786
1787         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1788                                (ATTR_SIZE|ATTR_MODE)) &&
1789             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1790              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1791               !(attr->ia_mode & S_ISGID))))
1792                 attr->ia_valid |= ATTR_FORCE;
1793
1794         if ((attr->ia_valid & ATTR_MODE) &&
1795             (mode & S_ISUID) &&
1796             !(attr->ia_mode & S_ISUID) &&
1797             !(attr->ia_valid & ATTR_KILL_SUID))
1798                 attr->ia_valid |= ATTR_KILL_SUID;
1799
1800         if ((attr->ia_valid & ATTR_MODE) &&
1801             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1802             !(attr->ia_mode & S_ISGID) &&
1803             !(attr->ia_valid & ATTR_KILL_SGID))
1804                 attr->ia_valid |= ATTR_KILL_SGID;
1805
1806         return ll_setattr_raw(de, attr, xvalid, false);
1807 }
1808
1809 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1810                        u32 flags)
1811 {
1812         struct obd_statfs obd_osfs = { 0 };
1813         time64_t max_age;
1814         int rc;
1815
1816         ENTRY;
1817         max_age = ktime_get_seconds() - sbi->ll_statfs_max_age;
1818
1819         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1820         if (rc)
1821                 RETURN(rc);
1822
1823         osfs->os_type = LL_SUPER_MAGIC;
1824
1825         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1826               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1827
1828         if (osfs->os_state & OS_STATE_SUM)
1829                 GOTO(out, rc);
1830
1831         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1832                 flags |= OBD_STATFS_NODELAY;
1833
1834         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1835         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
1836                 GOTO(out, rc = 0);
1837
1838         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1839                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1840                obd_osfs.os_files);
1841
1842         osfs->os_bsize = obd_osfs.os_bsize;
1843         osfs->os_blocks = obd_osfs.os_blocks;
1844         osfs->os_bfree = obd_osfs.os_bfree;
1845         osfs->os_bavail = obd_osfs.os_bavail;
1846
1847         /* If we have _some_ OSTs, but don't have as many free objects on the
1848          * OSTs as inodes on the MDTs, reduce the reported number of inodes
1849          * to compensate, so that the "inodes in use" number is correct.
1850          * This should be kept in sync with lod_statfs() behaviour.
1851          */
1852         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1853                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1854                                  obd_osfs.os_ffree;
1855                 osfs->os_ffree = obd_osfs.os_ffree;
1856         }
1857
1858 out:
1859         RETURN(rc);
1860 }
1861 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1862 {
1863         struct super_block *sb = de->d_sb;
1864         struct obd_statfs osfs;
1865         __u64 fsid = huge_encode_dev(sb->s_dev);
1866         int rc;
1867
1868         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1869         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1870
1871         /* Some amount of caching on the client is allowed */
1872         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1873         if (rc)
1874                 return rc;
1875
1876         statfs_unpack(sfs, &osfs);
1877
1878         /* We need to downshift for all 32-bit kernels, because we can't
1879          * tell if the kernel is being called via sys_statfs64() or not.
1880          * Stop before overflowing f_bsize - in which case it is better
1881          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1882         if (sizeof(long) < 8) {
1883                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1884                         sfs->f_bsize <<= 1;
1885
1886                         osfs.os_blocks >>= 1;
1887                         osfs.os_bfree >>= 1;
1888                         osfs.os_bavail >>= 1;
1889                 }
1890         }
1891
1892         sfs->f_blocks = osfs.os_blocks;
1893         sfs->f_bfree = osfs.os_bfree;
1894         sfs->f_bavail = osfs.os_bavail;
1895         sfs->f_fsid.val[0] = (__u32)fsid;
1896         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1897         return 0;
1898 }
1899
1900 void ll_inode_size_lock(struct inode *inode)
1901 {
1902         struct ll_inode_info *lli;
1903
1904         LASSERT(!S_ISDIR(inode->i_mode));
1905
1906         lli = ll_i2info(inode);
1907         mutex_lock(&lli->lli_size_mutex);
1908 }
1909
1910 void ll_inode_size_unlock(struct inode *inode)
1911 {
1912         struct ll_inode_info *lli;
1913
1914         lli = ll_i2info(inode);
1915         mutex_unlock(&lli->lli_size_mutex);
1916 }
1917
1918 void ll_update_inode_flags(struct inode *inode, int ext_flags)
1919 {
1920         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
1921         if (ext_flags & LUSTRE_PROJINHERIT_FL)
1922                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1923         else
1924                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
1925 }
1926
1927 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1928 {
1929         struct ll_inode_info *lli = ll_i2info(inode);
1930         struct mdt_body *body = md->body;
1931         struct ll_sb_info *sbi = ll_i2sbi(inode);
1932         int rc = 0;
1933
1934         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1935                 rc = cl_file_inode_init(inode, md);
1936                 if (rc)
1937                         return rc;
1938         }
1939
1940         if (S_ISDIR(inode->i_mode)) {
1941                 rc = ll_update_lsm_md(inode, md);
1942                 if (rc != 0)
1943                         return rc;
1944         }
1945
1946 #ifdef CONFIG_FS_POSIX_ACL
1947         if (body->mbo_valid & OBD_MD_FLACL) {
1948                 spin_lock(&lli->lli_lock);
1949                 if (lli->lli_posix_acl)
1950                         posix_acl_release(lli->lli_posix_acl);
1951                 lli->lli_posix_acl = md->posix_acl;
1952                 spin_unlock(&lli->lli_lock);
1953         }
1954 #endif
1955         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1956                                         sbi->ll_flags & LL_SBI_32BIT_API);
1957         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1958
1959         if (body->mbo_valid & OBD_MD_FLATIME) {
1960                 if (body->mbo_atime > inode->i_atime.tv_sec)
1961                         inode->i_atime.tv_sec = body->mbo_atime;
1962                 lli->lli_atime = body->mbo_atime;
1963         }
1964
1965         if (body->mbo_valid & OBD_MD_FLMTIME) {
1966                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
1967                         CDEBUG(D_INODE,
1968                                "setting ino %lu mtime from %lld to %llu\n",
1969                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
1970                                body->mbo_mtime);
1971                         inode->i_mtime.tv_sec = body->mbo_mtime;
1972                 }
1973                 lli->lli_mtime = body->mbo_mtime;
1974         }
1975
1976         if (body->mbo_valid & OBD_MD_FLCTIME) {
1977                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
1978                         inode->i_ctime.tv_sec = body->mbo_ctime;
1979                 lli->lli_ctime = body->mbo_ctime;
1980         }
1981
1982         /* Clear i_flags to remove S_NOSEC before permissions are updated */
1983         if (body->mbo_valid & OBD_MD_FLFLAGS)
1984                 ll_update_inode_flags(inode, body->mbo_flags);
1985         if (body->mbo_valid & OBD_MD_FLMODE)
1986                 inode->i_mode = (inode->i_mode & S_IFMT) |
1987                                 (body->mbo_mode & ~S_IFMT);
1988
1989         if (body->mbo_valid & OBD_MD_FLTYPE)
1990                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1991                                 (body->mbo_mode & S_IFMT);
1992
1993         LASSERT(inode->i_mode != 0);
1994         if (S_ISREG(inode->i_mode))
1995                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1996                                        LL_MAX_BLKSIZE_BITS);
1997         else
1998                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1999
2000         if (body->mbo_valid & OBD_MD_FLUID)
2001                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2002         if (body->mbo_valid & OBD_MD_FLGID)
2003                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2004         if (body->mbo_valid & OBD_MD_FLPROJID)
2005                 lli->lli_projid = body->mbo_projid;
2006         if (body->mbo_valid & OBD_MD_FLNLINK)
2007                 set_nlink(inode, body->mbo_nlink);
2008         if (body->mbo_valid & OBD_MD_FLRDEV)
2009                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2010
2011         if (body->mbo_valid & OBD_MD_FLID) {
2012                 /* FID shouldn't be changed! */
2013                 if (fid_is_sane(&lli->lli_fid)) {
2014                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2015                                  "Trying to change FID "DFID
2016                                  " to the "DFID", inode "DFID"(%p)\n",
2017                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2018                                  PFID(ll_inode2fid(inode)), inode);
2019                 } else {
2020                         lli->lli_fid = body->mbo_fid1;
2021                 }
2022         }
2023
2024         LASSERT(fid_seq(&lli->lli_fid) != 0);
2025
2026         if (body->mbo_valid & OBD_MD_FLSIZE) {
2027                 i_size_write(inode, body->mbo_size);
2028
2029                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2030                        PFID(ll_inode2fid(inode)),
2031                        (unsigned long long)body->mbo_size);
2032
2033                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2034                         inode->i_blocks = body->mbo_blocks;
2035         }
2036
2037         if (body->mbo_valid & OBD_MD_TSTATE) {
2038                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2039                  * clear it when done to ensure to start again
2040                  * glimpsing updated attrs
2041                  */
2042                 if (body->mbo_t_state & MS_RESTORE)
2043                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2044                 else
2045                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2046         }
2047
2048         return 0;
2049 }
2050
2051 int ll_read_inode2(struct inode *inode, void *opaque)
2052 {
2053         struct lustre_md *md = opaque;
2054         struct ll_inode_info *lli = ll_i2info(inode);
2055         int     rc;
2056         ENTRY;
2057
2058         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2059                PFID(&lli->lli_fid), inode);
2060
2061         /* Core attributes from the MDS first.  This is a new inode, and
2062          * the VFS doesn't zero times in the core inode so we have to do
2063          * it ourselves.  They will be overwritten by either MDS or OST
2064          * attributes - we just need to make sure they aren't newer.
2065          */
2066         inode->i_mtime.tv_sec = 0;
2067         inode->i_atime.tv_sec = 0;
2068         inode->i_ctime.tv_sec = 0;
2069         inode->i_rdev = 0;
2070         rc = ll_update_inode(inode, md);
2071         if (rc != 0)
2072                 RETURN(rc);
2073
2074         /* OIDEBUG(inode); */
2075
2076 #ifdef HAVE_BACKING_DEV_INFO
2077         /* initializing backing dev info. */
2078         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2079 #endif
2080         if (S_ISREG(inode->i_mode)) {
2081                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2082                 inode->i_op = &ll_file_inode_operations;
2083                 inode->i_fop = sbi->ll_fop;
2084                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2085                 EXIT;
2086         } else if (S_ISDIR(inode->i_mode)) {
2087                 inode->i_op = &ll_dir_inode_operations;
2088                 inode->i_fop = &ll_dir_operations;
2089                 EXIT;
2090         } else if (S_ISLNK(inode->i_mode)) {
2091                 inode->i_op = &ll_fast_symlink_inode_operations;
2092                 EXIT;
2093         } else {
2094                 inode->i_op = &ll_special_inode_operations;
2095
2096                 init_special_inode(inode, inode->i_mode,
2097                                    inode->i_rdev);
2098
2099                 EXIT;
2100         }
2101
2102         return 0;
2103 }
2104
2105 void ll_delete_inode(struct inode *inode)
2106 {
2107         struct ll_inode_info *lli = ll_i2info(inode);
2108         struct address_space *mapping = &inode->i_data;
2109         unsigned long nrpages;
2110         ENTRY;
2111
2112         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2113                 /* It is last chance to write out dirty pages,
2114                  * otherwise we may lose data while umount.
2115                  *
2116                  * If i_nlink is 0 then just discard data. This is safe because
2117                  * local inode gets i_nlink 0 from server only for the last
2118                  * unlink, so that file is not opened somewhere else
2119                  */
2120                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2121                                    CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2122         }
2123         truncate_inode_pages_final(mapping);
2124
2125         /* Workaround for LU-118: Note nrpages may not be totally updated when
2126          * truncate_inode_pages() returns, as there can be a page in the process
2127          * of deletion (inside __delete_from_page_cache()) in the specified
2128          * range. Thus mapping->nrpages can be non-zero when this function
2129          * returns even after truncation of the whole mapping.  Only do this if
2130          * npages isn't already zero.
2131          */
2132         nrpages = mapping->nrpages;
2133         if (nrpages) {
2134                 xa_lock_irq(&mapping->i_pages);
2135                 nrpages = mapping->nrpages;
2136                 xa_unlock_irq(&mapping->i_pages);
2137         } /* Workaround end */
2138
2139         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2140                  "see https://jira.whamcloud.com/browse/LU-118\n",
2141                  ll_get_fsname(inode->i_sb, NULL, 0),
2142                  PFID(ll_inode2fid(inode)), inode, nrpages);
2143
2144 #ifdef HAVE_SBOPS_EVICT_INODE
2145         ll_clear_inode(inode);
2146 #endif
2147         clear_inode(inode);
2148
2149         EXIT;
2150 }
2151
2152 int ll_iocontrol(struct inode *inode, struct file *file,
2153                  unsigned int cmd, unsigned long arg)
2154 {
2155         struct ll_sb_info *sbi = ll_i2sbi(inode);
2156         struct ptlrpc_request *req = NULL;
2157         int rc, flags = 0;
2158         ENTRY;
2159
2160         switch (cmd) {
2161         case FS_IOC_GETFLAGS: {
2162                 struct mdt_body *body;
2163                 struct md_op_data *op_data;
2164
2165                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2166                                              0, 0, LUSTRE_OPC_ANY,
2167                                              NULL);
2168                 if (IS_ERR(op_data))
2169                         RETURN(PTR_ERR(op_data));
2170
2171                 op_data->op_valid = OBD_MD_FLFLAGS;
2172                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2173                 ll_finish_md_op_data(op_data);
2174                 if (rc) {
2175                         CERROR("%s: failure inode "DFID": rc = %d\n",
2176                                sbi->ll_md_exp->exp_obd->obd_name,
2177                                PFID(ll_inode2fid(inode)), rc);
2178                         RETURN(-abs(rc));
2179                 }
2180
2181                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2182
2183                 flags = body->mbo_flags;
2184
2185                 ptlrpc_req_finished(req);
2186
2187                 RETURN(put_user(flags, (int __user *)arg));
2188         }
2189         case FS_IOC_SETFLAGS: {
2190                 struct iattr *attr;
2191                 struct md_op_data *op_data;
2192                 struct cl_object *obj;
2193                 struct fsxattr fa = { 0 };
2194
2195                 if (get_user(flags, (int __user *)arg))
2196                         RETURN(-EFAULT);
2197
2198                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2199                 if (flags & LUSTRE_PROJINHERIT_FL)
2200                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2201
2202                 rc = ll_ioctl_check_project(inode, &fa);
2203                 if (rc)
2204                         RETURN(rc);
2205
2206                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2207                                              LUSTRE_OPC_ANY, NULL);
2208                 if (IS_ERR(op_data))
2209                         RETURN(PTR_ERR(op_data));
2210
2211                 op_data->op_attr_flags = flags;
2212                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2213                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2214                 ll_finish_md_op_data(op_data);
2215                 ptlrpc_req_finished(req);
2216                 if (rc)
2217                         RETURN(rc);
2218
2219                 ll_update_inode_flags(inode, flags);
2220
2221                 obj = ll_i2info(inode)->lli_clob;
2222                 if (obj == NULL)
2223                         RETURN(0);
2224
2225                 OBD_ALLOC_PTR(attr);
2226                 if (attr == NULL)
2227                         RETURN(-ENOMEM);
2228
2229                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2230
2231                 OBD_FREE_PTR(attr);
2232                 RETURN(rc);
2233         }
2234         default:
2235                 RETURN(-ENOSYS);
2236         }
2237
2238         RETURN(0);
2239 }
2240
2241 int ll_flush_ctx(struct inode *inode)
2242 {
2243         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2244
2245         CDEBUG(D_SEC, "flush context for user %d\n",
2246                from_kuid(&init_user_ns, current_uid()));
2247
2248         obd_set_info_async(NULL, sbi->ll_md_exp,
2249                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2250                            0, NULL, NULL);
2251         obd_set_info_async(NULL, sbi->ll_dt_exp,
2252                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2253                            0, NULL, NULL);
2254         return 0;
2255 }
2256
2257 /* umount -f client means force down, don't save state */
2258 void ll_umount_begin(struct super_block *sb)
2259 {
2260         struct ll_sb_info *sbi = ll_s2sbi(sb);
2261         struct obd_device *obd;
2262         struct obd_ioctl_data *ioc_data;
2263         struct l_wait_info lwi;
2264         wait_queue_head_t waitq;
2265         ENTRY;
2266
2267         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2268                sb->s_count, atomic_read(&sb->s_active));
2269
2270         obd = class_exp2obd(sbi->ll_md_exp);
2271         if (obd == NULL) {
2272                 CERROR("Invalid MDC connection handle %#llx\n",
2273                        sbi->ll_md_exp->exp_handle.h_cookie);
2274                 EXIT;
2275                 return;
2276         }
2277         obd->obd_force = 1;
2278
2279         obd = class_exp2obd(sbi->ll_dt_exp);
2280         if (obd == NULL) {
2281                 CERROR("Invalid LOV connection handle %#llx\n",
2282                        sbi->ll_dt_exp->exp_handle.h_cookie);
2283                 EXIT;
2284                 return;
2285         }
2286         obd->obd_force = 1;
2287
2288         OBD_ALLOC_PTR(ioc_data);
2289         if (ioc_data) {
2290                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2291                               sizeof *ioc_data, ioc_data, NULL);
2292
2293                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2294                               sizeof *ioc_data, ioc_data, NULL);
2295
2296                 OBD_FREE_PTR(ioc_data);
2297         }
2298
2299         /* Really, we'd like to wait until there are no requests outstanding,
2300          * and then continue.  For now, we just periodically checking for vfs
2301          * to decrement mnt_cnt and hope to finish it within 10sec.
2302          */
2303         init_waitqueue_head(&waitq);
2304         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2305                                    cfs_time_seconds(1), NULL, NULL);
2306         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2307
2308         EXIT;
2309 }
2310
2311 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2312 {
2313         struct ll_sb_info *sbi = ll_s2sbi(sb);
2314         char *profilenm = get_profile_name(sb);
2315         int err;
2316         __u32 read_only;
2317
2318         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2319                 read_only = *flags & MS_RDONLY;
2320                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2321                                          sizeof(KEY_READ_ONLY),
2322                                          KEY_READ_ONLY, sizeof(read_only),
2323                                          &read_only, NULL);
2324                 if (err) {
2325                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2326                                       profilenm, read_only ?
2327                                       "read-only" : "read-write", err);
2328                         return err;
2329                 }
2330
2331                 if (read_only)
2332                         sb->s_flags |= MS_RDONLY;
2333                 else
2334                         sb->s_flags &= ~MS_RDONLY;
2335
2336                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2337                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2338                                       read_only ?  "read-only" : "read-write");
2339         }
2340         return 0;
2341 }
2342
2343 /**
2344  * Cleanup the open handle that is cached on MDT-side.
2345  *
2346  * For open case, the client side open handling thread may hit error
2347  * after the MDT grant the open. Under such case, the client should
2348  * send close RPC to the MDT as cleanup; otherwise, the open handle
2349  * on the MDT will be leaked there until the client umount or evicted.
2350  *
2351  * In further, if someone unlinked the file, because the open handle
2352  * holds the reference on such file/object, then it will block the
2353  * subsequent threads that want to locate such object via FID.
2354  *
2355  * \param[in] sb        super block for this file-system
2356  * \param[in] open_req  pointer to the original open request
2357  */
2358 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2359 {
2360         struct mdt_body                 *body;
2361         struct md_op_data               *op_data;
2362         struct ptlrpc_request           *close_req = NULL;
2363         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2364         ENTRY;
2365
2366         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2367         OBD_ALLOC_PTR(op_data);
2368         if (op_data == NULL) {
2369                 CWARN("%s: cannot allocate op_data to release open handle for "
2370                       DFID"\n",
2371                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2372
2373                 RETURN_EXIT;
2374         }
2375
2376         op_data->op_fid1 = body->mbo_fid1;
2377         op_data->op_open_handle = body->mbo_open_handle;
2378         op_data->op_mod_time = ktime_get_real_seconds();
2379         md_close(exp, op_data, NULL, &close_req);
2380         ptlrpc_req_finished(close_req);
2381         ll_finish_md_op_data(op_data);
2382
2383         EXIT;
2384 }
2385
2386 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2387                   struct super_block *sb, struct lookup_intent *it)
2388 {
2389         struct ll_sb_info *sbi = NULL;
2390         struct lustre_md md = { NULL };
2391         int rc;
2392         ENTRY;
2393
2394         LASSERT(*inode || sb);
2395         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2396         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2397                               sbi->ll_md_exp, &md);
2398         if (rc != 0)
2399                 GOTO(cleanup, rc);
2400
2401         if (*inode) {
2402                 rc = ll_update_inode(*inode, &md);
2403                 if (rc != 0)
2404                         GOTO(out, rc);
2405         } else {
2406                 LASSERT(sb != NULL);
2407
2408                 /*
2409                  * At this point server returns to client's same fid as client
2410                  * generated for creating. So using ->fid1 is okay here.
2411                  */
2412                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2413                         CERROR("%s: Fid is insane "DFID"\n",
2414                                 ll_get_fsname(sb, NULL, 0),
2415                                 PFID(&md.body->mbo_fid1));
2416                         GOTO(out, rc = -EINVAL);
2417                 }
2418
2419                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2420                                              sbi->ll_flags & LL_SBI_32BIT_API),
2421                                  &md);
2422                 if (IS_ERR(*inode)) {
2423 #ifdef CONFIG_FS_POSIX_ACL
2424                         if (md.posix_acl) {
2425                                 posix_acl_release(md.posix_acl);
2426                                 md.posix_acl = NULL;
2427                         }
2428 #endif
2429                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2430                         *inode = NULL;
2431                         CERROR("new_inode -fatal: rc %d\n", rc);
2432                         GOTO(out, rc);
2433                 }
2434         }
2435
2436         /* Handling piggyback layout lock.
2437          * Layout lock can be piggybacked by getattr and open request.
2438          * The lsm can be applied to inode only if it comes with a layout lock
2439          * otherwise correct layout may be overwritten, for example:
2440          * 1. proc1: mdt returns a lsm but not granting layout
2441          * 2. layout was changed by another client
2442          * 3. proc2: refresh layout and layout lock granted
2443          * 4. proc1: to apply a stale layout */
2444         if (it != NULL && it->it_lock_mode != 0) {
2445                 struct lustre_handle lockh;
2446                 struct ldlm_lock *lock;
2447
2448                 lockh.cookie = it->it_lock_handle;
2449                 lock = ldlm_handle2lock(&lockh);
2450                 LASSERT(lock != NULL);
2451                 if (ldlm_has_layout(lock)) {
2452                         struct cl_object_conf conf;
2453
2454                         memset(&conf, 0, sizeof(conf));
2455                         conf.coc_opc = OBJECT_CONF_SET;
2456                         conf.coc_inode = *inode;
2457                         conf.coc_lock = lock;
2458                         conf.u.coc_layout = md.layout;
2459                         (void)ll_layout_conf(*inode, &conf);
2460                 }
2461                 LDLM_LOCK_PUT(lock);
2462         }
2463
2464         GOTO(out, rc = 0);
2465
2466 out:
2467         md_free_lustre_md(sbi->ll_md_exp, &md);
2468
2469 cleanup:
2470         if (rc != 0 && it != NULL && it->it_op & IT_OPEN) {
2471                 ll_intent_drop_lock(it);
2472                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2473         }
2474
2475         return rc;
2476 }
2477
2478 int ll_obd_statfs(struct inode *inode, void __user *arg)
2479 {
2480         struct ll_sb_info *sbi = NULL;
2481         struct obd_export *exp;
2482         char *buf = NULL;
2483         struct obd_ioctl_data *data = NULL;
2484         __u32 type;
2485         int len = 0, rc;
2486
2487         if (!inode || !(sbi = ll_i2sbi(inode)))
2488                 GOTO(out_statfs, rc = -EINVAL);
2489
2490         rc = obd_ioctl_getdata(&buf, &len, arg);
2491         if (rc)
2492                 GOTO(out_statfs, rc);
2493
2494         data = (void*)buf;
2495         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2496             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2497                 GOTO(out_statfs, rc = -EINVAL);
2498
2499         if (data->ioc_inllen1 != sizeof(__u32) ||
2500             data->ioc_inllen2 != sizeof(__u32) ||
2501             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2502             data->ioc_plen2 != sizeof(struct obd_uuid))
2503                 GOTO(out_statfs, rc = -EINVAL);
2504
2505         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2506         if (type & LL_STATFS_LMV)
2507                 exp = sbi->ll_md_exp;
2508         else if (type & LL_STATFS_LOV)
2509                 exp = sbi->ll_dt_exp;
2510         else
2511                 GOTO(out_statfs, rc = -ENODEV);
2512
2513         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2514         if (rc)
2515                 GOTO(out_statfs, rc);
2516 out_statfs:
2517         OBD_FREE_LARGE(buf, len);
2518         return rc;
2519 }
2520
2521 /*
2522  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2523  * be called early to avoid deadlock.
2524  */
2525 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2526 {
2527         if (op_data->op_mea2_sem) {
2528                 up_read(op_data->op_mea2_sem);
2529                 op_data->op_mea2_sem = NULL;
2530         }
2531
2532         if (op_data->op_mea1_sem) {
2533                 up_read(op_data->op_mea1_sem);
2534                 op_data->op_mea1_sem = NULL;
2535         }
2536 }
2537
2538 /* this function prepares md_op_data hint for passing it down to MD stack. */
2539 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2540                                       struct inode *i1, struct inode *i2,
2541                                       const char *name, size_t namelen,
2542                                       __u32 mode, __u32 opc, void *data)
2543 {
2544         LASSERT(i1 != NULL);
2545
2546         if (name == NULL) {
2547                 /* Do not reuse namelen for something else. */
2548                 if (namelen != 0)
2549                         return ERR_PTR(-EINVAL);
2550         } else {
2551                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2552                         return ERR_PTR(-ENAMETOOLONG);
2553
2554                 if (!lu_name_is_valid_2(name, namelen))
2555                         return ERR_PTR(-EINVAL);
2556         }
2557
2558         if (op_data == NULL)
2559                 OBD_ALLOC_PTR(op_data);
2560
2561         if (op_data == NULL)
2562                 return ERR_PTR(-ENOMEM);
2563
2564         ll_i2gids(op_data->op_suppgids, i1, i2);
2565         op_data->op_fid1 = *ll_inode2fid(i1);
2566         op_data->op_default_stripe_offset = -1;
2567
2568         if (S_ISDIR(i1->i_mode)) {
2569                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2570                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2571                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2572                 if (opc == LUSTRE_OPC_MKDIR)
2573                         op_data->op_default_stripe_offset =
2574                                    ll_i2info(i1)->lli_def_stripe_offset;
2575         }
2576
2577         if (i2) {
2578                 op_data->op_fid2 = *ll_inode2fid(i2);
2579                 if (S_ISDIR(i2->i_mode)) {
2580                         if (i2 != i1) {
2581                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2582                                 op_data->op_mea2_sem =
2583                                                 &ll_i2info(i2)->lli_lsm_sem;
2584                         }
2585                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2586                 }
2587         } else {
2588                 fid_zero(&op_data->op_fid2);
2589         }
2590
2591         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2592                 op_data->op_cli_flags |= CLI_HASH64;
2593
2594         if (ll_need_32bit_api(ll_i2sbi(i1)))
2595                 op_data->op_cli_flags |= CLI_API32;
2596
2597         op_data->op_name = name;
2598         op_data->op_namelen = namelen;
2599         op_data->op_mode = mode;
2600         op_data->op_mod_time = ktime_get_real_seconds();
2601         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2602         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2603         op_data->op_cap = cfs_curproc_cap_pack();
2604         op_data->op_mds = 0;
2605         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2606              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2607                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2608         }
2609         op_data->op_data = data;
2610
2611         return op_data;
2612 }
2613
2614 void ll_finish_md_op_data(struct md_op_data *op_data)
2615 {
2616         ll_unlock_md_op_lsm(op_data);
2617         security_release_secctx(op_data->op_file_secctx,
2618                                 op_data->op_file_secctx_size);
2619         OBD_FREE_PTR(op_data);
2620 }
2621
2622 #ifdef HAVE_SUPEROPS_USE_DENTRY
2623 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2624 #else
2625 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2626 #endif
2627 {
2628         struct ll_sb_info *sbi;
2629
2630 #ifdef HAVE_SUPEROPS_USE_DENTRY
2631         LASSERT((seq != NULL) && (dentry != NULL));
2632         sbi = ll_s2sbi(dentry->d_sb);
2633 #else
2634         LASSERT((seq != NULL) && (vfs != NULL));
2635         sbi = ll_s2sbi(vfs->mnt_sb);
2636 #endif
2637
2638         if (sbi->ll_flags & LL_SBI_NOLCK)
2639                 seq_puts(seq, ",nolock");
2640
2641         /* "flock" is the default since 2.13, but it wasn't for many years,
2642          * so it is still useful to print this to show it is enabled.
2643          * Start to print "noflock" so it is now clear when flock is disabled.
2644          */
2645         if (sbi->ll_flags & LL_SBI_FLOCK)
2646                 seq_puts(seq, ",flock");
2647         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2648                 seq_puts(seq, ",localflock");
2649         else
2650                 seq_puts(seq, ",noflock");
2651
2652         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2653                 seq_puts(seq, ",user_xattr");
2654
2655         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2656                 seq_puts(seq, ",lazystatfs");
2657
2658         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2659                 seq_puts(seq, ",user_fid2path");
2660
2661         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2662                 seq_puts(seq, ",always_ping");
2663
2664         RETURN(0);
2665 }
2666
2667 /**
2668  * Get obd name by cmd, and copy out to user space
2669  */
2670 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2671 {
2672         struct ll_sb_info *sbi = ll_i2sbi(inode);
2673         struct obd_device *obd;
2674         ENTRY;
2675
2676         if (cmd == OBD_IOC_GETDTNAME)
2677                 obd = class_exp2obd(sbi->ll_dt_exp);
2678         else if (cmd == OBD_IOC_GETMDNAME)
2679                 obd = class_exp2obd(sbi->ll_md_exp);
2680         else
2681                 RETURN(-EINVAL);
2682
2683         if (!obd)
2684                 RETURN(-ENOENT);
2685
2686         if (copy_to_user((void __user *)arg, obd->obd_name,
2687                          strlen(obd->obd_name) + 1))
2688                 RETURN(-EFAULT);
2689
2690         RETURN(0);
2691 }
2692
2693 /**
2694  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2695  * fsname will be returned in this buffer; otherwise, a static buffer will be
2696  * used to store the fsname and returned to caller.
2697  */
2698 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2699 {
2700         static char fsname_static[MTI_NAME_MAXLEN];
2701         struct lustre_sb_info *lsi = s2lsi(sb);
2702         char *ptr;
2703         int len;
2704
2705         if (buf == NULL) {
2706                 /* this means the caller wants to use static buffer
2707                  * and it doesn't care about race. Usually this is
2708                  * in error reporting path */
2709                 buf = fsname_static;
2710                 buflen = sizeof(fsname_static);
2711         }
2712
2713         len = strlen(lsi->lsi_lmd->lmd_profile);
2714         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2715         if (ptr && (strcmp(ptr, "-client") == 0))
2716                 len -= 7;
2717
2718         if (unlikely(len >= buflen))
2719                 len = buflen - 1;
2720         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2721         buf[len] = '\0';
2722
2723         return buf;
2724 }
2725
2726 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2727 {
2728         char *path = NULL;
2729
2730         struct path p;
2731
2732         p.dentry = dentry;
2733         p.mnt = current->fs->root.mnt;
2734         path_get(&p);
2735         path = d_path(&p, buf, bufsize);
2736         path_put(&p);
2737         return path;
2738 }
2739
2740 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2741 {
2742         char *buf, *path = NULL;
2743         struct dentry *dentry = NULL;
2744         struct inode *inode = page->mapping->host;
2745
2746         /* this can be called inside spin lock so use GFP_ATOMIC. */
2747         buf = (char *)__get_free_page(GFP_ATOMIC);
2748         if (buf != NULL) {
2749                 dentry = d_find_alias(page->mapping->host);
2750                 if (dentry != NULL)
2751                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2752         }
2753
2754         CDEBUG(D_WARNING,
2755                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2756                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2757                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2758                PFID(ll_inode2fid(inode)),
2759                (path && !IS_ERR(path)) ? path : "", ioret);
2760
2761         if (dentry != NULL)
2762                 dput(dentry);
2763
2764         if (buf != NULL)
2765                 free_page((unsigned long)buf);
2766 }
2767
2768 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2769                         struct lov_user_md **kbuf)
2770 {
2771         struct lov_user_md      lum;
2772         ssize_t                 lum_size;
2773         ENTRY;
2774
2775         if (copy_from_user(&lum, md, sizeof(lum)))
2776                 RETURN(-EFAULT);
2777
2778         lum_size = ll_lov_user_md_size(&lum);
2779         if (lum_size < 0)
2780                 RETURN(lum_size);
2781
2782         OBD_ALLOC_LARGE(*kbuf, lum_size);
2783         if (*kbuf == NULL)
2784                 RETURN(-ENOMEM);
2785
2786         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2787                 OBD_FREE_LARGE(*kbuf, lum_size);
2788                 RETURN(-EFAULT);
2789         }
2790
2791         RETURN(lum_size);
2792 }
2793
2794 /*
2795  * Compute llite root squash state after a change of root squash
2796  * configuration setting or add/remove of a lnet nid
2797  */
2798 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2799 {
2800         struct root_squash_info *squash = &sbi->ll_squash;
2801         int i;
2802         bool matched;
2803         struct lnet_process_id id;
2804
2805         /* Update norootsquash flag */
2806         down_write(&squash->rsi_sem);
2807         if (list_empty(&squash->rsi_nosquash_nids))
2808                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2809         else {
2810                 /* Do not apply root squash as soon as one of our NIDs is
2811                  * in the nosquash_nids list */
2812                 matched = false;
2813                 i = 0;
2814                 while (LNetGetId(i++, &id) != -ENOENT) {
2815                         if (id.nid == LNET_NID_LO_0)
2816                                 continue;
2817                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2818                                 matched = true;
2819                                 break;
2820                         }
2821                 }
2822                 if (matched)
2823                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2824                 else
2825                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2826         }
2827         up_write(&squash->rsi_sem);
2828 }
2829
2830 /**
2831  * Parse linkea content to extract information about a given hardlink
2832  *
2833  * \param[in]   ldata      - Initialized linkea data
2834  * \param[in]   linkno     - Link identifier
2835  * \param[out]  parent_fid - The entry's parent FID
2836  * \param[out]  ln         - Entry name destination buffer
2837  *
2838  * \retval 0 on success
2839  * \retval Appropriate negative error code on failure
2840  */
2841 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2842                             struct lu_fid *parent_fid, struct lu_name *ln)
2843 {
2844         unsigned int    idx;
2845         int             rc;
2846         ENTRY;
2847
2848         rc = linkea_init_with_rec(ldata);
2849         if (rc < 0)
2850                 RETURN(rc);
2851
2852         if (linkno >= ldata->ld_leh->leh_reccount)
2853                 /* beyond last link */
2854                 RETURN(-ENODATA);
2855
2856         linkea_first_entry(ldata);
2857         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2858                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2859                                     parent_fid);
2860                 if (idx == linkno)
2861                         break;
2862
2863                 linkea_next_entry(ldata);
2864         }
2865
2866         if (idx < linkno)
2867                 RETURN(-ENODATA);
2868
2869         RETURN(0);
2870 }
2871
2872 /**
2873  * Get parent FID and name of an identified link. Operation is performed for
2874  * a given link number, letting the caller iterate over linkno to list one or
2875  * all links of an entry.
2876  *
2877  * \param[in]     file - File descriptor against which to perform the operation
2878  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2879  *                       on and the available size. It is eventually filled with
2880  *                       the requested information or left untouched on error
2881  *
2882  * \retval - 0 on success
2883  * \retval - Appropriate negative error code on failure
2884  */
2885 int ll_getparent(struct file *file, struct getparent __user *arg)
2886 {
2887         struct inode            *inode = file_inode(file);
2888         struct linkea_data      *ldata;
2889         struct lu_buf            buf = LU_BUF_NULL;
2890         struct lu_name           ln;
2891         struct lu_fid            parent_fid;
2892         __u32                    linkno;
2893         __u32                    name_size;
2894         int                      rc;
2895
2896         ENTRY;
2897
2898         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2899             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2900                 RETURN(-EPERM);
2901
2902         if (get_user(name_size, &arg->gp_name_size))
2903                 RETURN(-EFAULT);
2904
2905         if (get_user(linkno, &arg->gp_linkno))
2906                 RETURN(-EFAULT);
2907
2908         if (name_size > PATH_MAX)
2909                 RETURN(-EINVAL);
2910
2911         OBD_ALLOC(ldata, sizeof(*ldata));
2912         if (ldata == NULL)
2913                 RETURN(-ENOMEM);
2914
2915         rc = linkea_data_new(ldata, &buf);
2916         if (rc < 0)
2917                 GOTO(ldata_free, rc);
2918
2919 #ifdef HAVE_XATTR_HANDLER_FLAGS
2920         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2921                            buf.lb_len, OBD_MD_FLXATTR);
2922 #else
2923         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2924                          buf.lb_len);
2925 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2926         if (rc < 0)
2927                 GOTO(lb_free, rc);
2928
2929         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2930         if (rc < 0)
2931                 GOTO(lb_free, rc);
2932
2933         if (ln.ln_namelen >= name_size)
2934                 GOTO(lb_free, rc = -EOVERFLOW);
2935
2936         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2937                 GOTO(lb_free, rc = -EFAULT);
2938
2939         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2940                 GOTO(lb_free, rc = -EFAULT);
2941
2942         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2943                 GOTO(lb_free, rc = -EFAULT);
2944
2945 lb_free:
2946         lu_buf_free(&buf);
2947 ldata_free:
2948         OBD_FREE(ldata, sizeof(*ldata));
2949
2950         RETURN(rc);
2951 }