lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/random.h>
  41 #include <linux/statfs.h>
  42 #include <linux/time.h>
  43 #include <linux/types.h>
  44 #include <libcfs/linux/linux-uuid.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47 #include <linux/user_namespace.h>
  48 #include <linux/delay.h>
  49 #include <linux/uidgid.h>
  50 #include <linux/security.h>
  51
  52 #include <uapi/linux/lustre/lustre_ioctl.h>
  53 #ifdef HAVE_UAPI_LINUX_MOUNT_H
  54 #include <uapi/linux/mount.h>
  55 #endif
  56
  57 #include <lustre_ha.h>
  58 #include <lustre_dlm.h>
  59 #include <lprocfs_status.h>
  60 #include <lustre_disk.h>
  61 #include <uapi/linux/lustre/lustre_param.h>
  62 #include <lustre_log.h>
  63 #include <cl_object.h>
  64 #include <obd_cksum.h>
  65 #include "llite_internal.h"
  66
  67 struct kmem_cache *ll_file_data_slab;
  68
  69 #ifndef log2
  70 #define log2(n) ffz(~(n))
  71 #endif
  72
  73 static struct ll_sb_info *ll_init_sbi(void)
  74 {
  75         struct ll_sb_info *sbi = NULL;
  76         unsigned long pages;
  77         unsigned long lru_page_max;
  78         struct sysinfo si;
  79         int rc;
  80         int i;
  81
  82         ENTRY;
  83
  84         OBD_ALLOC_PTR(sbi);
  85         if (sbi == NULL)
  86                 RETURN(ERR_PTR(-ENOMEM));
  87
  88         rc = pcc_super_init(&sbi->ll_pcc_super);
  89         if (rc < 0)
  90                 GOTO(out_sbi, rc);
  91
  92         spin_lock_init(&sbi->ll_lock);
  93         mutex_init(&sbi->ll_lco.lco_lock);
  94         spin_lock_init(&sbi->ll_pp_extent_lock);
  95         spin_lock_init(&sbi->ll_process_lock);
  96         sbi->ll_rw_stats_on = 0;
  97         sbi->ll_statfs_max_age = OBD_STATFS_CACHE_SECONDS;
  98
  99         si_meminfo(&si);
 100         pages = si.totalram - si.totalhigh;
 101         lru_page_max = pages / 2;
 102
 103         sbi->ll_ra_info.ra_async_max_active = 0;
 104         sbi->ll_ra_info.ll_readahead_wq =
 105                 alloc_workqueue("ll-readahead-wq", WQ_UNBOUND,
 106                                 sbi->ll_ra_info.ra_async_max_active);
 107         if (!sbi->ll_ra_info.ll_readahead_wq)
 108                 GOTO(out_pcc, rc = -ENOMEM);
 109
 110         /* initialize ll_cache data */
 111         sbi->ll_cache = cl_cache_init(lru_page_max);
 112         if (sbi->ll_cache == NULL)
 113                 GOTO(out_destroy_ra, rc = -ENOMEM);
 114
 115         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 116                                            SBI_DEFAULT_READAHEAD_MAX);
 117         sbi->ll_ra_info.ra_async_pages_per_file_threshold =
 118                                 sbi->ll_ra_info.ra_max_pages_per_file;
 119         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 120         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 121
 122         sbi->ll_flags |= LL_SBI_VERBOSE;
 123 #ifdef ENABLE_CHECKSUM
 124         sbi->ll_flags |= LL_SBI_CHECKSUM;
 125 #endif
 126 #ifdef ENABLE_FLOCK
 127         sbi->ll_flags |= LL_SBI_FLOCK;
 128 #endif
 129
 130 #ifdef HAVE_LRU_RESIZE_SUPPORT
 131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 132 #endif
 133         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 134
 135         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 136                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 137                                pp_r_hist.oh_lock);
 138                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 139                                pp_w_hist.oh_lock);
 140         }
 141
 142         /* metadata statahead is enabled by default */
 143         sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
 144         sbi->ll_sa_max = LL_SA_RPC_DEF;
 145         atomic_set(&sbi->ll_sa_total, 0);
 146         atomic_set(&sbi->ll_sa_wrong, 0);
 147         atomic_set(&sbi->ll_sa_running, 0);
 148         atomic_set(&sbi->ll_agl_total, 0);
 149         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 150         sbi->ll_flags |= LL_SBI_FAST_READ;
 151         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 152
 153         /* root squash */
 154         sbi->ll_squash.rsi_uid = 0;
 155         sbi->ll_squash.rsi_gid = 0;
 156         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 157         spin_lock_init(&sbi->ll_squash.rsi_lock);
 158
 159         /* Per-filesystem file heat */
 160         sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
 161         sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
 162         RETURN(sbi);
 163 out_destroy_ra:
 164         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 165 out_pcc:
 166         pcc_super_fini(&sbi->ll_pcc_super);
 167 out_sbi:
 168         OBD_FREE_PTR(sbi);
 169         RETURN(ERR_PTR(rc));
 170 }
 171
 172 static void ll_free_sbi(struct super_block *sb)
 173 {
 174         struct ll_sb_info *sbi = ll_s2sbi(sb);
 175         ENTRY;
 176
 177         if (sbi != NULL) {
 178                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 179                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 180                 if (sbi->ll_ra_info.ll_readahead_wq)
 181                         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 182                 if (sbi->ll_cache != NULL) {
 183                         cl_cache_decref(sbi->ll_cache);
 184                         sbi->ll_cache = NULL;
 185                 }
 186                 pcc_super_fini(&sbi->ll_pcc_super);
 187                 OBD_FREE(sbi, sizeof(*sbi));
 188         }
 189         EXIT;
 190 }
 191
 192 static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 193 {
 194         struct inode *root = NULL;
 195         struct ll_sb_info *sbi = ll_s2sbi(sb);
 196         struct obd_statfs *osfs = NULL;
 197         struct ptlrpc_request *request = NULL;
 198         struct obd_connect_data *data = NULL;
 199         struct obd_uuid *uuid;
 200         struct md_op_data *op_data;
 201         struct lustre_md lmd;
 202         u64 valid;
 203         int size, err, checksum;
 204
 205         ENTRY;
 206         sbi->ll_md_obd = class_name2obd(md);
 207         if (!sbi->ll_md_obd) {
 208                 CERROR("MD %s: not setup or attached\n", md);
 209                 RETURN(-EINVAL);
 210         }
 211
 212         OBD_ALLOC_PTR(data);
 213         if (data == NULL)
 214                 RETURN(-ENOMEM);
 215
 216         OBD_ALLOC_PTR(osfs);
 217         if (osfs == NULL) {
 218                 OBD_FREE_PTR(data);
 219                 RETURN(-ENOMEM);
 220         }
 221
 222         /* pass client page size via ocd_grant_blkbits, the server should report
 223          * back its backend blocksize for grant calculation purpose */
 224         data->ocd_grant_blkbits = PAGE_SHIFT;
 225
 226         /* indicate MDT features supported by this client */
 227         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 228                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 229                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 230                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 231                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 232                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 233                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 234                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 235                                   OBD_CONNECT_64BITHASH |
 236                                   OBD_CONNECT_EINPROGRESS |
 237                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 238                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 239                                   OBD_CONNECT_MAX_EASIZE |
 240                                   OBD_CONNECT_FLOCK_DEAD |
 241                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 242                                   OBD_CONNECT_OPEN_BY_FID |
 243                                   OBD_CONNECT_DIR_STRIPE |
 244                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 245                                   OBD_CONNECT_SUBTREE |
 246                                   OBD_CONNECT_MULTIMODRPCS |
 247                                   OBD_CONNECT_GRANT_PARAM |
 248                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 249
 250         data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
 251                                    OBD_CONNECT2_SUM_STATFS |
 252                                    OBD_CONNECT2_OVERSTRIPING |
 253                                    OBD_CONNECT2_FLR |
 254                                    OBD_CONNECT2_LOCK_CONVERT |
 255                                    OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 256                                    OBD_CONNECT2_INC_XID |
 257                                    OBD_CONNECT2_LSOM |
 258                                    OBD_CONNECT2_ASYNC_DISCARD |
 259                                    OBD_CONNECT2_PCC;
 260
 261 #ifdef HAVE_LRU_RESIZE_SUPPORT
 262         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 263                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 264 #endif
 265 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
 266         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 267                                    OBD_CONNECT_LARGE_ACL;
 268 #endif
 269
 270         data->ocd_cksum_types = obd_cksum_types_supported_client();
 271
 272         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 273                 /* flag mdc connection as lightweight, only used for test
 274                  * purpose, use with care */
 275                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 276
 277         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 278         data->ocd_version = LUSTRE_VERSION_CODE;
 279
 280         if (sb->s_flags & SB_RDONLY)
 281                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 282         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 283                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 284
 285 #ifdef SB_NOSEC
 286         /* Setting this indicates we correctly support S_NOSEC (See kernel
 287          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 288          */
 289         sb->s_flags |= SB_NOSEC;
 290 #endif
 291
 292         if (sbi->ll_flags & LL_SBI_FLOCK)
 293                 sbi->ll_fop = &ll_file_operations_flock;
 294         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 295                 sbi->ll_fop = &ll_file_operations;
 296         else
 297                 sbi->ll_fop = &ll_file_operations_noflock;
 298
 299         /* always ping even if server suppress_pings */
 300         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 301                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 302
 303         obd_connect_set_secctx(data);
 304
 305 #if defined(CONFIG_SECURITY)
 306         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 307 #endif
 308
 309         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 310
 311         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 312                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 313         if (err == -EBUSY) {
 314                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 315                                    "recovery, of which this client is not a "
 316                                    "part. Please wait for recovery to complete,"
 317                                    " abort, or time out.\n", md);
 318                 GOTO(out, err);
 319         } else if (err) {
 320                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 321                 GOTO(out, err);
 322         }
 323
 324         sbi->ll_md_exp->exp_connect_data = *data;
 325
 326         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 327                            LUSTRE_SEQ_METADATA);
 328         if (err) {
 329                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 330                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 331                 GOTO(out_md, err);
 332         }
 333
 334         /* For mount, we only need fs info from MDT0, and also in DNE, it
 335          * can make sure the client can be mounted as long as MDT0 is
 336          * avaible */
 337         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 338                         ktime_get_seconds() - sbi->ll_statfs_max_age,
 339                         OBD_STATFS_FOR_MDT0);
 340         if (err)
 341                 GOTO(out_md_fid, err);
 342
 343         /* This needs to be after statfs to ensure connect has finished.
 344          * Note that "data" does NOT contain the valid connect reply.
 345          * If connecting to a 1.8 server there will be no LMV device, so
 346          * we can access the MDC export directly and exp_connect_flags will
 347          * be non-zero, but if accessing an upgraded 2.1 server it will
 348          * have the correct flags filled in.
 349          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 350         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 351         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 352             valid != CLIENT_CONNECT_MDT_REQD) {
 353                 char *buf;
 354
 355                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 356                 obd_connect_flags2str(buf, PAGE_SIZE,
 357                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 358                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 359                                    "feature(s) needed for correct operation "
 360                                    "of this client (%s). Please upgrade "
 361                                    "server or downgrade client.\n",
 362                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 363                 OBD_FREE(buf, PAGE_SIZE);
 364                 GOTO(out_md_fid, err = -EPROTO);
 365         }
 366
 367         size = sizeof(*data);
 368         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 369                            KEY_CONN_DATA,  &size, data);
 370         if (err) {
 371                 CERROR("%s: Get connect data failed: rc = %d\n",
 372                        sbi->ll_md_exp->exp_obd->obd_name, err);
 373                 GOTO(out_md_fid, err);
 374         }
 375
 376         LASSERT(osfs->os_bsize);
 377         sb->s_blocksize = osfs->os_bsize;
 378         sb->s_blocksize_bits = log2(osfs->os_bsize);
 379         sb->s_magic = LL_SUPER_MAGIC;
 380         sb->s_maxbytes = MAX_LFS_FILESIZE;
 381         sbi->ll_namelen = osfs->os_namelen;
 382         sbi->ll_mnt.mnt = current->fs->root.mnt;
 383
 384         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 385             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 386                 LCONSOLE_INFO("Disabling user_xattr feature because "
 387                               "it is not supported on the server\n");
 388                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 389         }
 390
 391         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 392 #ifdef SB_POSIXACL
 393                 sb->s_flags |= SB_POSIXACL;
 394 #endif
 395                 sbi->ll_flags |= LL_SBI_ACL;
 396         } else {
 397                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 398 #ifdef SB_POSIXACL
 399                 sb->s_flags &= ~SB_POSIXACL;
 400 #endif
 401                 sbi->ll_flags &= ~LL_SBI_ACL;
 402         }
 403
 404         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 405                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 406
 407         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 408                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 409
 410         if (obd_connect_has_secctx(data))
 411                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 412
 413         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 414                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 415                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 416                                       "unknown maximum xattr size.\n", dt);
 417                 } else if (!sbi->ll_xattr_cache_set) {
 418                         /* If xattr_cache is already set (no matter 0 or 1)
 419                          * during processing llog, it won't be enabled here. */
 420                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 421                         sbi->ll_xattr_cache_enabled = 1;
 422                 }
 423         }
 424
 425         sbi->ll_dt_obd = class_name2obd(dt);
 426         if (!sbi->ll_dt_obd) {
 427                 CERROR("DT %s: not setup or attached\n", dt);
 428                 GOTO(out_md_fid, err = -ENODEV);
 429         }
 430
 431         /* pass client page size via ocd_grant_blkbits, the server should report
 432          * back its backend blocksize for grant calculation purpose */
 433         data->ocd_grant_blkbits = PAGE_SHIFT;
 434
 435         /* indicate OST features supported by this client */
 436         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 437                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 438                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 439                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 440                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 441                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 442                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 443                                   OBD_CONNECT_EINPROGRESS |
 444                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 445                                   OBD_CONNECT_LAYOUTLOCK |
 446                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 447                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 448                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 449
 450 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 451  * can interoperate with an older version of lockahead which was released prior
 452  * to landing in master. This support will be dropped when 2.13 development
 453  * starts.  At the point, we should not just drop the connect flag (below), we
 454  * should also remove the support in the code.
 455  *
 456  * Removing it means a few things:
 457  * 1. Remove this section here
 458  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 459  * 3. Remove function exp_connect_lockahead_old
 460  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 461  * */
 462 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 463         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 464 #endif
 465
 466         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD |
 467                                    OBD_CONNECT2_INC_XID;
 468
 469         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 470                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 471
 472         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 473          * disabled by default, because it can still be enabled on the
 474          * fly via /sys. As a consequence, we still need to come to an
 475          * agreement on the supported algorithms at connect time
 476          */
 477         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 478
 479         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 480                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 481         else
 482                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 483
 484 #ifdef HAVE_LRU_RESIZE_SUPPORT
 485         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 486 #endif
 487         /* always ping even if server suppress_pings */
 488         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 489                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 490
 491         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 492                "ocd_grant: %d\n", data->ocd_connect_flags,
 493                data->ocd_version, data->ocd_grant);
 494
 495         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 496         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 497
 498         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 499
 500         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 501                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 502         if (err == -EBUSY) {
 503                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 504                                    "recovery, of which this client is not a "
 505                                    "part.  Please wait for recovery to "
 506                                    "complete, abort, or time out.\n", dt);
 507                 GOTO(out_md, err);
 508         } else if (err) {
 509                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 510                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 511                 GOTO(out_md, err);
 512         }
 513
 514         sbi->ll_dt_exp->exp_connect_data = *data;
 515
 516         /* Don't change value if it was specified in the config log */
 517         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
 518                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 519                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 520                               (data->ocd_brw_size >> PAGE_SHIFT));
 521                 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
 522                     sbi->ll_ra_info.ra_max_pages_per_file)
 523                         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 524                                 sbi->ll_ra_info.ra_max_pages_per_file;
 525         }
 526
 527         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 528                            LUSTRE_SEQ_METADATA);
 529         if (err) {
 530                 CERROR("%s: Can't init data layer FID infrastructure, "
 531                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 532                 GOTO(out_dt, err);
 533         }
 534
 535         mutex_lock(&sbi->ll_lco.lco_lock);
 536         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 537         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 538         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 539         mutex_unlock(&sbi->ll_lco.lco_lock);
 540
 541         fid_zero(&sbi->ll_root_fid);
 542         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 543                            &sbi->ll_root_fid);
 544         if (err) {
 545                 CERROR("cannot mds_connect: rc = %d\n", err);
 546                 GOTO(out_lock_cn_cb, err);
 547         }
 548         if (!fid_is_sane(&sbi->ll_root_fid)) {
 549                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 550                        sbi->ll_md_exp->exp_obd->obd_name,
 551                        PFID(&sbi->ll_root_fid));
 552                 GOTO(out_lock_cn_cb, err = -EINVAL);
 553         }
 554         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 555
 556         sb->s_op = &lustre_super_operations;
 557         sb->s_xattr = ll_xattr_handlers;
 558 #if THREAD_SIZE >= 8192 /*b=17630*/
 559         sb->s_export_op = &lustre_export_operations;
 560 #endif
 561
 562         /* make root inode
 563          * XXX: move this to after cbd setup? */
 564         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 565         if (sbi->ll_flags & LL_SBI_ACL)
 566                 valid |= OBD_MD_FLACL;
 567
 568         OBD_ALLOC_PTR(op_data);
 569         if (op_data == NULL)
 570                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 571
 572         op_data->op_fid1 = sbi->ll_root_fid;
 573         op_data->op_mode = 0;
 574         op_data->op_valid = valid;
 575
 576         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 577
 578         OBD_FREE_PTR(op_data);
 579         if (err) {
 580                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 581                        sbi->ll_md_exp->exp_obd->obd_name, err);
 582                 GOTO(out_lock_cn_cb, err);
 583         }
 584
 585         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 586                                sbi->ll_md_exp, &lmd);
 587         if (err) {
 588                 CERROR("failed to understand root inode md: rc = %d\n", err);
 589                 ptlrpc_req_finished(request);
 590                 GOTO(out_lock_cn_cb, err);
 591         }
 592
 593         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 594         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 595                                             sbi->ll_flags & LL_SBI_32BIT_API),
 596                        &lmd);
 597         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 598         ptlrpc_req_finished(request);
 599
 600         if (IS_ERR(root)) {
 601 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
 602                 if (lmd.posix_acl) {
 603                         posix_acl_release(lmd.posix_acl);
 604                         lmd.posix_acl = NULL;
 605                 }
 606 #endif
 607                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 608                 root = NULL;
 609                 CERROR("%s: bad ll_iget() for root: rc = %d\n",
 610                        sbi->ll_fsname, err);
 611                 GOTO(out_root, err);
 612         }
 613
 614         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 615         if (sbi->ll_checksum_set) {
 616                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 617                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 618                                          sizeof(checksum), &checksum, NULL);
 619                 if (err) {
 620                         CERROR("%s: Set checksum failed: rc = %d\n",
 621                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 622                         GOTO(out_root, err);
 623                 }
 624         }
 625         cl_sb_init(sb);
 626
 627         sb->s_root = d_make_root(root);
 628         if (sb->s_root == NULL) {
 629                 err = -ENOMEM;
 630                 CERROR("%s: can't make root dentry: rc = %d\n",
 631                        sbi->ll_fsname, err);
 632                 GOTO(out_root, err);
 633         }
 634
 635         sbi->ll_sdev_orig = sb->s_dev;
 636
 637         /* We set sb->s_dev equal on all lustre clients in order to support
 638          * NFS export clustering.  NFSD requires that the FSID be the same
 639          * on all clients. */
 640         /* s_dev is also used in lt_compare() to compare two fs, but that is
 641          * only a node-local comparison. */
 642         uuid = obd_get_uuid(sbi->ll_md_exp);
 643         if (uuid != NULL)
 644                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 645
 646         if (data != NULL)
 647                 OBD_FREE_PTR(data);
 648         if (osfs != NULL)
 649                 OBD_FREE_PTR(osfs);
 650
 651         if (sbi->ll_dt_obd) {
 652                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 653                                         &sbi->ll_dt_obd->obd_kset.kobj,
 654                                         sbi->ll_dt_obd->obd_type->typ_name);
 655                 if (err < 0) {
 656                         CERROR("%s: could not register %s in llite: rc = %d\n",
 657                                dt, sbi->ll_fsname, err);
 658                         err = 0;
 659                 }
 660         }
 661
 662         if (sbi->ll_md_obd) {
 663                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 664                                         &sbi->ll_md_obd->obd_kset.kobj,
 665                                         sbi->ll_md_obd->obd_type->typ_name);
 666                 if (err < 0) {
 667                         CERROR("%s: could not register %s in llite: rc = %d\n",
 668                                md, sbi->ll_fsname, err);
 669                         err = 0;
 670                 }
 671         }
 672
 673         RETURN(err);
 674 out_root:
 675         if (root)
 676                 iput(root);
 677 out_lock_cn_cb:
 678         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 679 out_dt:
 680         obd_disconnect(sbi->ll_dt_exp);
 681         sbi->ll_dt_exp = NULL;
 682         sbi->ll_dt_obd = NULL;
 683 out_md_fid:
 684         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 685 out_md:
 686         obd_disconnect(sbi->ll_md_exp);
 687         sbi->ll_md_exp = NULL;
 688         sbi->ll_md_obd = NULL;
 689 out:
 690         if (data != NULL)
 691                 OBD_FREE_PTR(data);
 692         if (osfs != NULL)
 693                 OBD_FREE_PTR(osfs);
 694         return err;
 695 }
 696
 697 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 698 {
 699         int size, rc;
 700
 701         size = sizeof(*lmmsize);
 702         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 703                           KEY_MAX_EASIZE, &size, lmmsize);
 704         if (rc != 0) {
 705                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 706                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 707                 RETURN(rc);
 708         }
 709
 710         CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
 711
 712         size = sizeof(int);
 713         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 714                           KEY_MAX_EASIZE, &size, lmmsize);
 715         if (rc)
 716                 CERROR("Get max mdsize error rc %d\n", rc);
 717
 718         CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
 719
 720         RETURN(rc);
 721 }
 722
 723 /**
 724  * Get the value of the default_easize parameter.
 725  *
 726  * \see client_obd::cl_default_mds_easize
 727  *
 728  * \param[in] sbi       superblock info for this filesystem
 729  * \param[out] lmmsize  pointer to storage location for value
 730  *
 731  * \retval 0            on success
 732  * \retval negative     negated errno on failure
 733  */
 734 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 735 {
 736         int size, rc;
 737
 738         size = sizeof(int);
 739         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 740                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 741         if (rc)
 742                 CERROR("Get default mdsize error rc %d\n", rc);
 743
 744         RETURN(rc);
 745 }
 746
 747 /**
 748  * Set the default_easize parameter to the given value.
 749  *
 750  * \see client_obd::cl_default_mds_easize
 751  *
 752  * \param[in] sbi       superblock info for this filesystem
 753  * \param[in] lmmsize   the size to set
 754  *
 755  * \retval 0            on success
 756  * \retval negative     negated errno on failure
 757  */
 758 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 759 {
 760         int rc;
 761
 762         if (lmmsize < sizeof(struct lov_mds_md) ||
 763             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 764                 return -EINVAL;
 765
 766         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 767                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 768                                 sizeof(int), &lmmsize, NULL);
 769
 770         RETURN(rc);
 771 }
 772
 773 static void client_common_put_super(struct super_block *sb)
 774 {
 775         struct ll_sb_info *sbi = ll_s2sbi(sb);
 776         ENTRY;
 777
 778         cl_sb_fini(sb);
 779
 780         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 781         obd_disconnect(sbi->ll_dt_exp);
 782         sbi->ll_dt_exp = NULL;
 783
 784         ll_debugfs_unregister_super(sb);
 785
 786         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 787         obd_disconnect(sbi->ll_md_exp);
 788         sbi->ll_md_exp = NULL;
 789
 790         EXIT;
 791 }
 792
 793 void ll_kill_super(struct super_block *sb)
 794 {
 795         struct ll_sb_info *sbi;
 796         ENTRY;
 797
 798         /* not init sb ?*/
 799         if (!(sb->s_flags & SB_ACTIVE))
 800                 return;
 801
 802         sbi = ll_s2sbi(sb);
 803         /* we need restore s_dev from changed for clustred NFS before put_super
 804          * because new kernels have cached s_dev and change sb->s_dev in
 805          * put_super not affected real removing devices */
 806         if (sbi) {
 807                 sb->s_dev = sbi->ll_sdev_orig;
 808
 809                 /* wait running statahead threads to quit */
 810                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 811                         set_current_state(TASK_UNINTERRUPTIBLE);
 812                         schedule_timeout(cfs_time_seconds(1) >> 3);
 813                 }
 814         }
 815
 816         EXIT;
 817 }
 818
 819 static inline int ll_set_opt(const char *opt, char *data, int fl)
 820 {
 821         if (strncmp(opt, data, strlen(opt)) != 0)
 822                 return 0;
 823         else
 824                 return fl;
 825 }
 826
 827 /* non-client-specific mount options are parsed in lmd_parse */
 828 static int ll_options(char *options, struct ll_sb_info *sbi)
 829 {
 830         int tmp;
 831         char *s1 = options, *s2;
 832         int *flags = &sbi->ll_flags;
 833         ENTRY;
 834
 835         if (!options)
 836                 RETURN(0);
 837
 838         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 839
 840         while (*s1) {
 841                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 842                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 843                 if (tmp) {
 844                         *flags |= tmp;
 845                         goto next;
 846                 }
 847                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 848                 if (tmp) {
 849                         *flags = (*flags & ~LL_SBI_LOCALFLOCK) | tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 853                 if (tmp) {
 854                         *flags = (*flags & ~LL_SBI_FLOCK) | tmp;
 855                         goto next;
 856                 }
 857                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 858                 if (tmp) {
 859                         *flags &= ~tmp;
 860                         goto next;
 861                 }
 862                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 863                 if (tmp) {
 864                         *flags |= tmp;
 865                         goto next;
 866                 }
 867                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 868                 if (tmp) {
 869                         *flags &= ~tmp;
 870                         goto next;
 871                 }
 872                 tmp = ll_set_opt("context", s1, 1);
 873                 if (tmp)
 874                         goto next;
 875                 tmp = ll_set_opt("fscontext", s1, 1);
 876                 if (tmp)
 877                         goto next;
 878                 tmp = ll_set_opt("defcontext", s1, 1);
 879                 if (tmp)
 880                         goto next;
 881                 tmp = ll_set_opt("rootcontext", s1, 1);
 882                 if (tmp)
 883                         goto next;
 884                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 885                 if (tmp) {
 886                         *flags |= tmp;
 887                         goto next;
 888                 }
 889                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 890                 if (tmp) {
 891                         *flags &= ~tmp;
 892                         goto next;
 893                 }
 894
 895                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 896                 if (tmp) {
 897                         *flags |= tmp;
 898                         sbi->ll_checksum_set = 1;
 899                         goto next;
 900                 }
 901                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 902                 if (tmp) {
 903                         *flags &= ~tmp;
 904                         sbi->ll_checksum_set = 1;
 905                         goto next;
 906                 }
 907                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 908                 if (tmp) {
 909                         *flags |= tmp;
 910                         goto next;
 911                 }
 912                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 913                 if (tmp) {
 914                         *flags &= ~tmp;
 915                         goto next;
 916                 }
 917                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 918                 if (tmp) {
 919                         *flags |= tmp;
 920                         goto next;
 921                 }
 922                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 923                 if (tmp) {
 924                         *flags &= ~tmp;
 925                         goto next;
 926                 }
 927                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 928                 if (tmp) {
 929                         *flags |= tmp;
 930                         goto next;
 931                 }
 932                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 933                 if (tmp) {
 934                         *flags |= tmp;
 935                         goto next;
 936                 }
 937                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 938                 if (tmp) {
 939                         *flags &= ~tmp;
 940                         goto next;
 941                 }
 942                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 943                 if (tmp) {
 944                         *flags |= tmp;
 945                         goto next;
 946                 }
 947                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 948                                    s1);
 949                 RETURN(-EINVAL);
 950
 951 next:
 952                 /* Find next opt */
 953                 s2 = strchr(s1, ',');
 954                 if (s2 == NULL)
 955                         break;
 956                 s1 = s2 + 1;
 957         }
 958         RETURN(0);
 959 }
 960
 961 void ll_lli_init(struct ll_inode_info *lli)
 962 {
 963         lli->lli_inode_magic = LLI_INODE_MAGIC;
 964         lli->lli_flags = 0;
 965         spin_lock_init(&lli->lli_lock);
 966         lli->lli_posix_acl = NULL;
 967         /* Do not set lli_fid, it has been initialized already. */
 968         fid_zero(&lli->lli_pfid);
 969         lli->lli_mds_read_och = NULL;
 970         lli->lli_mds_write_och = NULL;
 971         lli->lli_mds_exec_och = NULL;
 972         lli->lli_open_fd_read_count = 0;
 973         lli->lli_open_fd_write_count = 0;
 974         lli->lli_open_fd_exec_count = 0;
 975         mutex_init(&lli->lli_och_mutex);
 976         spin_lock_init(&lli->lli_agl_lock);
 977         spin_lock_init(&lli->lli_layout_lock);
 978         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 979         lli->lli_clob = NULL;
 980
 981         init_rwsem(&lli->lli_xattrs_list_rwsem);
 982         mutex_init(&lli->lli_xattrs_enq_lock);
 983
 984         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 985         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 986                 lli->lli_opendir_key = NULL;
 987                 lli->lli_sai = NULL;
 988                 spin_lock_init(&lli->lli_sa_lock);
 989                 lli->lli_opendir_pid = 0;
 990                 lli->lli_sa_enabled = 0;
 991                 init_rwsem(&lli->lli_lsm_sem);
 992         } else {
 993                 mutex_init(&lli->lli_size_mutex);
 994                 lli->lli_symlink_name = NULL;
 995                 ll_trunc_sem_init(&lli->lli_trunc_sem);
 996                 range_lock_tree_init(&lli->lli_write_tree);
 997                 init_rwsem(&lli->lli_glimpse_sem);
 998                 lli->lli_glimpse_time = ktime_set(0, 0);
 999                 INIT_LIST_HEAD(&lli->lli_agl_list);
1000                 lli->lli_agl_index = 0;
1001                 lli->lli_async_rc = 0;
1002                 spin_lock_init(&lli->lli_heat_lock);
1003                 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
1004                 lli->lli_heat_flags = 0;
1005                 mutex_init(&lli->lli_pcc_lock);
1006                 lli->lli_pcc_state = PCC_STATE_FL_NONE;
1007                 lli->lli_pcc_inode = NULL;
1008                 lli->lli_pcc_dsflags = PCC_DATASET_INVALID;
1009                 lli->lli_pcc_generation = 0;
1010                 mutex_init(&lli->lli_group_mutex);
1011                 lli->lli_group_users = 0;
1012                 lli->lli_group_gid = 0;
1013         }
1014         mutex_init(&lli->lli_layout_mutex);
1015         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
1016 }
1017
1018 #define MAX_STRING_SIZE 128
1019
1020 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1021
1022 #define LSI_BDI_INITIALIZED     0x00400000
1023
1024 #ifndef HAVE_BDI_CAP_MAP_COPY
1025 # define BDI_CAP_MAP_COPY       0
1026 #endif
1027
1028 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1029 {
1030         struct  lustre_sb_info *lsi = s2lsi(sb);
1031         char buf[MAX_STRING_SIZE];
1032         va_list args;
1033         int err;
1034
1035         err = bdi_init(&lsi->lsi_bdi);
1036         if (err)
1037                 return err;
1038
1039         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1040         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1041         lsi->lsi_bdi.name = "lustre";
1042         va_start(args, fmt);
1043         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1044         va_end(args);
1045         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1046         va_end(args);
1047         if (!err)
1048                 sb->s_bdi = &lsi->lsi_bdi;
1049
1050         return err;
1051 }
1052 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1053
1054 int ll_fill_super(struct super_block *sb)
1055 {
1056         struct  lustre_profile *lprof = NULL;
1057         struct  lustre_sb_info *lsi = s2lsi(sb);
1058         struct  ll_sb_info *sbi = NULL;
1059         char    *dt = NULL, *md = NULL;
1060         char    *profilenm = get_profile_name(sb);
1061         struct config_llog_instance *cfg;
1062         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1063         const int instlen = LUSTRE_MAXINSTANCE + 2;
1064         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1065         char name[MAX_STRING_SIZE];
1066         int md_len = 0;
1067         int dt_len = 0;
1068         uuid_t uuid;
1069         char *ptr;
1070         int len;
1071         int err;
1072
1073         ENTRY;
1074         /* for ASLR, to map between cfg_instance and hashed ptr */
1075         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1076                profilenm, cfg_instance, sb);
1077
1078         OBD_ALLOC_PTR(cfg);
1079         if (cfg == NULL)
1080                 GOTO(out_free_cfg, err = -ENOMEM);
1081
1082         /* client additional sb info */
1083         lsi->lsi_llsbi = sbi = ll_init_sbi();
1084         if (IS_ERR(sbi))
1085                 GOTO(out_free_cfg, err = PTR_ERR(sbi));
1086
1087         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1088         if (err)
1089                 GOTO(out_free_cfg, err);
1090
1091         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1092         sb->s_d_op = &ll_d_ops;
1093
1094         /* UUID handling */
1095         generate_random_uuid(uuid.b);
1096         snprintf(sbi->ll_sb_uuid.uuid, UUID_SIZE, "%pU", uuid.b);
1097
1098         CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1099
1100         /* Get fsname */
1101         len = strlen(profilenm);
1102         ptr = strrchr(profilenm, '-');
1103         if (ptr && (strcmp(ptr, "-client") == 0))
1104                 len -= 7;
1105
1106         if (len > LUSTRE_MAXFSNAME) {
1107                 if (unlikely(len >= MAX_STRING_SIZE))
1108                         len = MAX_STRING_SIZE - 1;
1109                 strncpy(name, profilenm, len);
1110                 name[len] = '\0';
1111                 err = -ENAMETOOLONG;
1112                 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1113                        name, LUSTRE_MAXFSNAME, err);
1114                 GOTO(out_free_cfg, err);
1115         }
1116         strncpy(sbi->ll_fsname, profilenm, len);
1117         sbi->ll_fsname[len] = '\0';
1118
1119         /* Mount info */
1120         snprintf(name, sizeof(name), "%.*s-%016lx", len,
1121                  profilenm, cfg_instance);
1122
1123         err = super_setup_bdi_name(sb, "%s", name);
1124         if (err)
1125                 GOTO(out_free_cfg, err);
1126
1127         /* Call ll_debugfs_register_super() before lustre_process_log()
1128          * so that "llite.*.*" params can be processed correctly.
1129          */
1130         err = ll_debugfs_register_super(sb, name);
1131         if (err < 0) {
1132                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1133                        sbi->ll_fsname, err);
1134                 err = 0;
1135         }
1136
1137         /* The cfg_instance is a value unique to this super, in case some
1138          * joker tries to mount the same fs at two mount points.
1139          */
1140         cfg->cfg_instance = cfg_instance;
1141         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1142         cfg->cfg_callback = class_config_llog_handler;
1143         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1144         /* set up client obds */
1145         err = lustre_process_log(sb, profilenm, cfg);
1146         if (err < 0)
1147                 GOTO(out_debugfs, err);
1148
1149         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1150         lprof = class_get_profile(profilenm);
1151         if (lprof == NULL) {
1152                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1153                                    " read from the MGS.  Does that filesystem "
1154                                    "exist?\n", profilenm);
1155                 GOTO(out_debugfs, err = -EINVAL);
1156         }
1157         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1158                lprof->lp_md, lprof->lp_dt);
1159
1160         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1161         OBD_ALLOC(dt, dt_len);
1162         if (!dt)
1163                 GOTO(out_profile, err = -ENOMEM);
1164         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1165
1166         md_len = strlen(lprof->lp_md) + instlen + 2;
1167         OBD_ALLOC(md, md_len);
1168         if (!md)
1169                 GOTO(out_free_dt, err = -ENOMEM);
1170         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1171
1172         /* connections, registrations, sb setup */
1173         err = client_common_fill_super(sb, md, dt);
1174         if (err < 0)
1175                 GOTO(out_free_md, err);
1176
1177         sbi->ll_client_common_fill_super_succeeded = 1;
1178
1179 out_free_md:
1180         if (md)
1181                 OBD_FREE(md, md_len);
1182 out_free_dt:
1183         if (dt)
1184                 OBD_FREE(dt, dt_len);
1185 out_profile:
1186         if (lprof)
1187                 class_put_profile(lprof);
1188 out_debugfs:
1189         if (err < 0)
1190                 ll_debugfs_unregister_super(sb);
1191 out_free_cfg:
1192         if (cfg)
1193                 OBD_FREE_PTR(cfg);
1194
1195         if (err)
1196                 ll_put_super(sb);
1197         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1198                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1199         RETURN(err);
1200 } /* ll_fill_super */
1201
1202 void ll_put_super(struct super_block *sb)
1203 {
1204         struct config_llog_instance cfg, params_cfg;
1205         struct obd_device *obd;
1206         struct lustre_sb_info *lsi = s2lsi(sb);
1207         struct ll_sb_info *sbi = ll_s2sbi(sb);
1208         char *profilenm = get_profile_name(sb);
1209         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1210         long ccc_count;
1211         int next, force = 1, rc = 0;
1212         ENTRY;
1213
1214         if (IS_ERR(sbi))
1215                 GOTO(out_no_sbi, 0);
1216
1217         /* Should replace instance_id with something better for ASLR */
1218         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1219                profilenm, cfg_instance, sb);
1220
1221         cfg.cfg_instance = cfg_instance;
1222         lustre_end_log(sb, profilenm, &cfg);
1223
1224         params_cfg.cfg_instance = cfg_instance;
1225         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1226
1227         if (sbi->ll_md_exp) {
1228                 obd = class_exp2obd(sbi->ll_md_exp);
1229                 if (obd)
1230                         force = obd->obd_force;
1231         }
1232
1233         /* Wait for unstable pages to be committed to stable storage */
1234         if (force == 0) {
1235                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1236                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1237                                   atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1238                                   &lwi);
1239         }
1240
1241         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1242         if (force == 0 && rc != -EINTR)
1243                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1244
1245         /* We need to set force before the lov_disconnect in
1246          * lustre_common_put_super, since l_d cleans up osc's as well.
1247          */
1248         if (force) {
1249                 next = 0;
1250                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1251                                                      &next)) != NULL) {
1252                         obd->obd_force = force;
1253                 }
1254         }
1255
1256         if (sbi->ll_client_common_fill_super_succeeded) {
1257                 /* Only if client_common_fill_super succeeded */
1258                 client_common_put_super(sb);
1259         }
1260
1261         next = 0;
1262         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1263                 class_manual_cleanup(obd);
1264
1265         if (sbi->ll_flags & LL_SBI_VERBOSE)
1266                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1267
1268         if (profilenm)
1269                 class_del_profile(profilenm);
1270
1271 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1272         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1273                 bdi_destroy(&lsi->lsi_bdi);
1274                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1275         }
1276 #endif
1277
1278         ll_free_sbi(sb);
1279         lsi->lsi_llsbi = NULL;
1280 out_no_sbi:
1281         lustre_common_put_super(sb);
1282
1283         cl_env_cache_purge(~0);
1284
1285         module_put(THIS_MODULE);
1286
1287         EXIT;
1288 } /* client_put_super */
1289
1290 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1291 {
1292         struct inode *inode = NULL;
1293
1294         /* NOTE: we depend on atomic igrab() -bzzz */
1295         lock_res_and_lock(lock);
1296         if (lock->l_resource->lr_lvb_inode) {
1297                 struct ll_inode_info * lli;
1298                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1299                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1300                         inode = igrab(lock->l_resource->lr_lvb_inode);
1301                 } else {
1302                         inode = lock->l_resource->lr_lvb_inode;
1303                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1304                                          D_WARNING, lock, "lr_lvb_inode %p is "
1305                                          "bogus: magic %08x",
1306                                          lock->l_resource->lr_lvb_inode,
1307                                          lli->lli_inode_magic);
1308                         inode = NULL;
1309                 }
1310         }
1311         unlock_res_and_lock(lock);
1312         return inode;
1313 }
1314
1315 void ll_dir_clear_lsm_md(struct inode *inode)
1316 {
1317         struct ll_inode_info *lli = ll_i2info(inode);
1318
1319         LASSERT(S_ISDIR(inode->i_mode));
1320
1321         if (lli->lli_lsm_md) {
1322                 lmv_free_memmd(lli->lli_lsm_md);
1323                 lli->lli_lsm_md = NULL;
1324         }
1325
1326         if (lli->lli_default_lsm_md) {
1327                 lmv_free_memmd(lli->lli_default_lsm_md);
1328                 lli->lli_default_lsm_md = NULL;
1329         }
1330 }
1331
1332 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1333                                       const struct lu_fid *fid,
1334                                       struct lustre_md *md)
1335 {
1336         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1337         struct mdt_body         *body = md->body;
1338         struct inode            *inode;
1339         ino_t                   ino;
1340         ENTRY;
1341
1342         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1343         inode = iget_locked(sb, ino);
1344         if (inode == NULL) {
1345                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1346                        sbi->ll_fsname, PFID(fid));
1347                 RETURN(ERR_PTR(-ENOENT));
1348         }
1349
1350         if (inode->i_state & I_NEW) {
1351                 struct ll_inode_info *lli = ll_i2info(inode);
1352                 struct lmv_stripe_md *lsm = md->lmv;
1353
1354                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1355                                 (body->mbo_mode & S_IFMT);
1356                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1357                          PFID(fid));
1358
1359                 inode->i_mtime.tv_sec = 0;
1360                 inode->i_atime.tv_sec = 0;
1361                 inode->i_ctime.tv_sec = 0;
1362                 inode->i_rdev = 0;
1363
1364 #ifdef HAVE_BACKING_DEV_INFO
1365                 /* initializing backing dev info. */
1366                 inode->i_mapping->backing_dev_info =
1367                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1368 #endif
1369                 inode->i_op = &ll_dir_inode_operations;
1370                 inode->i_fop = &ll_dir_operations;
1371                 lli->lli_fid = *fid;
1372                 ll_lli_init(lli);
1373
1374                 LASSERT(lsm != NULL);
1375                 /* master object FID */
1376                 lli->lli_pfid = body->mbo_fid1;
1377                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1378                        lli, PFID(fid), PFID(&lli->lli_pfid));
1379                 unlock_new_inode(inode);
1380         }
1381
1382         RETURN(inode);
1383 }
1384
1385 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1386 {
1387         struct lu_fid *fid;
1388         struct lmv_stripe_md *lsm = md->lmv;
1389         struct ll_inode_info *lli = ll_i2info(inode);
1390         int i;
1391
1392         LASSERT(lsm != NULL);
1393
1394         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1395                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1396         lsm_md_dump(D_INODE, lsm);
1397
1398         if (!lmv_dir_striped(lsm))
1399                 goto out;
1400
1401         /* XXX sigh, this lsm_root initialization should be in
1402          * LMV layer, but it needs ll_iget right now, so we
1403          * put this here right now. */
1404         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1405                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1406                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1407
1408                 if (!fid_is_sane(fid))
1409                         continue;
1410
1411                 /* Unfortunately ll_iget will call ll_update_inode,
1412                  * where the initialization of slave inode is slightly
1413                  * different, so it reset lsm_md to NULL to avoid
1414                  * initializing lsm for slave inode. */
1415                 lsm->lsm_md_oinfo[i].lmo_root =
1416                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1417                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1418                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1419
1420                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1421                         while (i-- > 0) {
1422                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1423                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1424                         }
1425                         return rc;
1426                 }
1427         }
1428 out:
1429         lli->lli_lsm_md = lsm;
1430
1431         return 0;
1432 }
1433
1434 static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
1435 {
1436         struct ll_inode_info *lli = ll_i2info(inode);
1437
1438         if (!md->default_lmv) {
1439                 /* clear default lsm */
1440                 if (lli->lli_default_lsm_md) {
1441                         down_write(&lli->lli_lsm_sem);
1442                         if (lli->lli_default_lsm_md) {
1443                                 lmv_free_memmd(lli->lli_default_lsm_md);
1444                                 lli->lli_default_lsm_md = NULL;
1445                         }
1446                         up_write(&lli->lli_lsm_sem);
1447                 }
1448         } else if (lli->lli_default_lsm_md) {
1449                 /* update default lsm if it changes */
1450                 down_read(&lli->lli_lsm_sem);
1451                 if (lli->lli_default_lsm_md &&
1452                     !lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
1453                         up_read(&lli->lli_lsm_sem);
1454                         down_write(&lli->lli_lsm_sem);
1455                         if (lli->lli_default_lsm_md)
1456                                 lmv_free_memmd(lli->lli_default_lsm_md);
1457                         lli->lli_default_lsm_md = md->default_lmv;
1458                         lsm_md_dump(D_INODE, md->default_lmv);
1459                         md->default_lmv = NULL;
1460                         up_write(&lli->lli_lsm_sem);
1461                 } else {
1462                         up_read(&lli->lli_lsm_sem);
1463                 }
1464         } else {
1465                 /* init default lsm */
1466                 down_write(&lli->lli_lsm_sem);
1467                 lli->lli_default_lsm_md = md->default_lmv;
1468                 lsm_md_dump(D_INODE, md->default_lmv);
1469                 md->default_lmv = NULL;
1470                 up_write(&lli->lli_lsm_sem);
1471         }
1472 }
1473
1474 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1475 {
1476         struct ll_inode_info *lli = ll_i2info(inode);
1477         struct lmv_stripe_md *lsm = md->lmv;
1478         struct cl_attr  *attr;
1479         int rc = 0;
1480
1481         ENTRY;
1482
1483         LASSERT(S_ISDIR(inode->i_mode));
1484         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1485                PFID(ll_inode2fid(inode)));
1486
1487         /* update default LMV */
1488         if (md->default_lmv)
1489                 ll_update_default_lsm_md(inode, md);
1490
1491         /*
1492          * no striped information from request, lustre_md from req does not
1493          * include stripeEA, see ll_md_setattr()
1494          */
1495         if (!lsm)
1496                 RETURN(0);
1497
1498         /*
1499          * normally dir layout doesn't change, only take read lock to check
1500          * that to avoid blocking other MD operations.
1501          */
1502         down_read(&lli->lli_lsm_sem);
1503
1504         /* some current lookup initialized lsm, and unchanged */
1505         if (lli->lli_lsm_md && lsm_md_eq(lli->lli_lsm_md, lsm))
1506                 GOTO(unlock, rc = 0);
1507
1508         /* if dir layout doesn't match, check whether version is increased,
1509          * which means layout is changed, this happens in dir split/merge and
1510          * lfsck.
1511          *
1512          * foreign LMV should not change.
1513          */
1514         if (lli->lli_lsm_md && lmv_dir_striped(lli->lli_lsm_md) &&
1515             lsm->lsm_md_layout_version <=
1516             lli->lli_lsm_md->lsm_md_layout_version) {
1517                 CERROR("%s: "DFID" dir layout mismatch:\n",
1518                        ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1519                 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1520                 lsm_md_dump(D_ERROR, lsm);
1521                 GOTO(unlock, rc = -EINVAL);
1522         }
1523
1524         up_read(&lli->lli_lsm_sem);
1525         down_write(&lli->lli_lsm_sem);
1526         /* clear existing lsm */
1527         if (lli->lli_lsm_md) {
1528                 lmv_free_memmd(lli->lli_lsm_md);
1529                 lli->lli_lsm_md = NULL;
1530         }
1531
1532         rc = ll_init_lsm_md(inode, md);
1533         up_write(&lli->lli_lsm_sem);
1534
1535         if (rc)
1536                 RETURN(rc);
1537
1538         /* set md->lmv to NULL, so the following free lustre_md will not free
1539          * this lsm.
1540          */
1541         md->lmv = NULL;
1542
1543         /* md_merge_attr() may take long, since lsm is already set, switch to
1544          * read lock.
1545          */
1546         down_read(&lli->lli_lsm_sem);
1547
1548         if (!lmv_dir_striped(lli->lli_lsm_md))
1549                 GOTO(unlock, rc = 0);
1550
1551         OBD_ALLOC_PTR(attr);
1552         if (!attr)
1553                 GOTO(unlock, rc = -ENOMEM);
1554
1555         /* validate the lsm */
1556         rc = md_merge_attr(ll_i2mdexp(inode), lli->lli_lsm_md, attr,
1557                            ll_md_blocking_ast);
1558         if (!rc) {
1559                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1560                         md->body->mbo_nlink = attr->cat_nlink;
1561                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1562                         md->body->mbo_size = attr->cat_size;
1563                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1564                         md->body->mbo_atime = attr->cat_atime;
1565                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1566                         md->body->mbo_ctime = attr->cat_ctime;
1567                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1568                         md->body->mbo_mtime = attr->cat_mtime;
1569         }
1570
1571         OBD_FREE_PTR(attr);
1572         GOTO(unlock, rc);
1573 unlock:
1574         up_read(&lli->lli_lsm_sem);
1575
1576         return rc;
1577 }
1578
1579 void ll_clear_inode(struct inode *inode)
1580 {
1581         struct ll_inode_info *lli = ll_i2info(inode);
1582         struct ll_sb_info *sbi = ll_i2sbi(inode);
1583
1584         ENTRY;
1585
1586         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1587                PFID(ll_inode2fid(inode)), inode);
1588
1589         if (S_ISDIR(inode->i_mode)) {
1590                 /* these should have been cleared in ll_file_release */
1591                 LASSERT(lli->lli_opendir_key == NULL);
1592                 LASSERT(lli->lli_sai == NULL);
1593                 LASSERT(lli->lli_opendir_pid == 0);
1594         } else {
1595                 pcc_inode_free(inode);
1596         }
1597
1598         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1599
1600         LASSERT(!lli->lli_open_fd_write_count);
1601         LASSERT(!lli->lli_open_fd_read_count);
1602         LASSERT(!lli->lli_open_fd_exec_count);
1603
1604         if (lli->lli_mds_write_och)
1605                 ll_md_real_close(inode, FMODE_WRITE);
1606         if (lli->lli_mds_exec_och)
1607                 ll_md_real_close(inode, FMODE_EXEC);
1608         if (lli->lli_mds_read_och)
1609                 ll_md_real_close(inode, FMODE_READ);
1610
1611         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1612                 OBD_FREE(lli->lli_symlink_name,
1613                          strlen(lli->lli_symlink_name) + 1);
1614                 lli->lli_symlink_name = NULL;
1615         }
1616
1617         ll_xattr_cache_destroy(inode);
1618
1619 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
1620         forget_all_cached_acls(inode);
1621         if (lli->lli_posix_acl) {
1622                 posix_acl_release(lli->lli_posix_acl);
1623                 lli->lli_posix_acl = NULL;
1624         }
1625 #endif
1626         lli->lli_inode_magic = LLI_INODE_DEAD;
1627
1628         if (S_ISDIR(inode->i_mode))
1629                 ll_dir_clear_lsm_md(inode);
1630         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1631                 LASSERT(list_empty(&lli->lli_agl_list));
1632
1633         /*
1634          * XXX This has to be done before lsm is freed below, because
1635          * cl_object still uses inode lsm.
1636          */
1637         cl_inode_fini(inode);
1638
1639         EXIT;
1640 }
1641
1642 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1643 {
1644         struct lustre_md md;
1645         struct inode *inode = dentry->d_inode;
1646         struct ll_sb_info *sbi = ll_i2sbi(inode);
1647         struct ptlrpc_request *request = NULL;
1648         int rc, ia_valid;
1649         ENTRY;
1650
1651         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1652                                      LUSTRE_OPC_ANY, NULL);
1653         if (IS_ERR(op_data))
1654                 RETURN(PTR_ERR(op_data));
1655
1656         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1657         if (rc) {
1658                 ptlrpc_req_finished(request);
1659                 if (rc == -ENOENT) {
1660                         clear_nlink(inode);
1661                         /* Unlinked special device node? Or just a race?
1662                          * Pretend we done everything. */
1663                         if (!S_ISREG(inode->i_mode) &&
1664                             !S_ISDIR(inode->i_mode)) {
1665                                 ia_valid = op_data->op_attr.ia_valid;
1666                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1667                                 rc = simple_setattr(dentry, &op_data->op_attr);
1668                                 op_data->op_attr.ia_valid = ia_valid;
1669                         }
1670                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1671                         CERROR("md_setattr fails: rc = %d\n", rc);
1672                 }
1673                 RETURN(rc);
1674         }
1675
1676         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1677                               sbi->ll_md_exp, &md);
1678         if (rc) {
1679                 ptlrpc_req_finished(request);
1680                 RETURN(rc);
1681         }
1682
1683         ia_valid = op_data->op_attr.ia_valid;
1684         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1685          * cache is not cleared yet. */
1686         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1687         if (S_ISREG(inode->i_mode))
1688                 inode_lock(inode);
1689         rc = simple_setattr(dentry, &op_data->op_attr);
1690         if (S_ISREG(inode->i_mode))
1691                 inode_unlock(inode);
1692         op_data->op_attr.ia_valid = ia_valid;
1693
1694         rc = ll_update_inode(inode, &md);
1695         ptlrpc_req_finished(request);
1696
1697         RETURN(rc);
1698 }
1699
1700 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1701  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1702  * keep these values until such a time that objects are allocated for it.
1703  * We do the MDS operations first, as it is checking permissions for us.
1704  * We don't to the MDS RPC if there is nothing that we want to store there,
1705  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1706  * going to do an RPC anyways.
1707  *
1708  * If we are doing a truncate, we will send the mtime and ctime updates
1709  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1710  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1711  * at the same time.
1712  *
1713  * In case of HSMimport, we only set attr on MDS.
1714  */
1715 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1716                    enum op_xvalid xvalid, bool hsm_import)
1717 {
1718         struct inode *inode = dentry->d_inode;
1719         struct ll_inode_info *lli = ll_i2info(inode);
1720         struct md_op_data *op_data = NULL;
1721         ktime_t kstart = ktime_get();
1722         int rc = 0;
1723
1724         ENTRY;
1725
1726         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1727                "valid %x, hsm_import %d\n",
1728                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
1729                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1730                hsm_import);
1731
1732         if (attr->ia_valid & ATTR_SIZE) {
1733                 /* Check new size against VFS/VM file size limit and rlimit */
1734                 rc = inode_newsize_ok(inode, attr->ia_size);
1735                 if (rc)
1736                         RETURN(rc);
1737
1738                 /* The maximum Lustre file size is variable, based on the
1739                  * OST maximum object size and number of stripes.  This
1740                  * needs another check in addition to the VFS check above. */
1741                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1742                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1743                                PFID(&lli->lli_fid), attr->ia_size,
1744                                ll_file_maxbytes(inode));
1745                         RETURN(-EFBIG);
1746                 }
1747
1748                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1749         }
1750
1751         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1752         if (attr->ia_valid & TIMES_SET_FLAGS) {
1753                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1754                     !cfs_capable(CFS_CAP_FOWNER))
1755                         RETURN(-EPERM);
1756         }
1757
1758         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1759         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1760              (attr->ia_valid & ATTR_CTIME)) {
1761                 attr->ia_ctime = current_time(inode);
1762                 xvalid |= OP_XVALID_CTIME_SET;
1763         }
1764         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1765             (attr->ia_valid & ATTR_ATIME)) {
1766                 attr->ia_atime = current_time(inode);
1767                 attr->ia_valid |= ATTR_ATIME_SET;
1768         }
1769         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1770             (attr->ia_valid & ATTR_MTIME)) {
1771                 attr->ia_mtime = current_time(inode);
1772                 attr->ia_valid |= ATTR_MTIME_SET;
1773         }
1774
1775         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1776                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1777                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1778                        ktime_get_real_seconds());
1779
1780         if (S_ISREG(inode->i_mode)) {
1781                 if (attr->ia_valid & ATTR_SIZE)
1782                         inode_dio_write_done(inode);
1783                 inode_unlock(inode);
1784         }
1785
1786         /* We always do an MDS RPC, even if we're only changing the size;
1787          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1788
1789         OBD_ALLOC_PTR(op_data);
1790         if (op_data == NULL)
1791                 GOTO(out, rc = -ENOMEM);
1792
1793         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1794                 /* If we are changing file size, file content is
1795                  * modified, flag it.
1796                  */
1797                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1798                 op_data->op_bias |= MDS_DATA_MODIFIED;
1799                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1800         }
1801
1802         if (attr->ia_valid & ATTR_FILE) {
1803                 struct ll_file_data *fd = LUSTRE_FPRIVATE(attr->ia_file);
1804
1805                 if (fd->fd_lease_och)
1806                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1807         }
1808
1809         op_data->op_attr = *attr;
1810         op_data->op_xvalid = xvalid;
1811
1812         rc = ll_md_setattr(dentry, op_data);
1813         if (rc)
1814                 GOTO(out, rc);
1815
1816         if (!S_ISREG(inode->i_mode) || hsm_import)
1817                 GOTO(out, rc = 0);
1818
1819         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1820                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1821             xvalid & OP_XVALID_CTIME_SET) {
1822                 bool cached = false;
1823
1824                 rc = pcc_inode_setattr(inode, attr, &cached);
1825                 if (cached) {
1826                         if (rc) {
1827                                 CERROR("%s: PCC inode "DFID" setattr failed: "
1828                                        "rc = %d\n",
1829                                        ll_i2sbi(inode)->ll_fsname,
1830                                        PFID(&lli->lli_fid), rc);
1831                                 GOTO(out, rc);
1832                         }
1833                 } else {
1834                         /* For truncate and utimes sending attributes to OSTs,
1835                          * setting mtime/atime to the past will be performed
1836                          * under PW [0:EOF] extent lock (new_size:EOF for
1837                          * truncate). It may seem excessive to send mtime/atime
1838                          * updates to OSTs when not setting times to past, but
1839                          * it is necessary due to possible time
1840                          * de-synchronization between MDT inode and OST objects
1841                          */
1842                         rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1843                 }
1844         }
1845
1846         /* If the file was restored, it needs to set dirty flag.
1847          *
1848          * We've already sent MDS_DATA_MODIFIED flag in
1849          * ll_md_setattr() for truncate. However, the MDT refuses to
1850          * set the HS_DIRTY flag on released files, so we have to set
1851          * it again if the file has been restored. Please check how
1852          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1853          *
1854          * Please notice that if the file is not released, the previous
1855          * MDS_DATA_MODIFIED has taken effect and usually
1856          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1857          * This way we can save an RPC for common open + trunc
1858          * operation. */
1859         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1860                 struct hsm_state_set hss = {
1861                         .hss_valid = HSS_SETMASK,
1862                         .hss_setmask = HS_DIRTY,
1863                 };
1864                 int rc2;
1865
1866                 rc2 = ll_hsm_state_set(inode, &hss);
1867                 /* truncate and write can happen at the same time, so that
1868                  * the file can be set modified even though the file is not
1869                  * restored from released state, and ll_hsm_state_set() is
1870                  * not applicable for the file, and rc2 < 0 is normal in this
1871                  * case. */
1872                 if (rc2 < 0)
1873                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1874                                PFID(ll_inode2fid(inode)), rc2);
1875         }
1876
1877         EXIT;
1878 out:
1879         if (op_data != NULL)
1880                 ll_finish_md_op_data(op_data);
1881
1882         if (S_ISREG(inode->i_mode)) {
1883                 inode_lock(inode);
1884                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1885                         inode_dio_wait(inode);
1886                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1887                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1888                  * inode flags, so there is a gap where S_NOSEC is not set.
1889                  * This can cause a writer to take the i_mutex unnecessarily,
1890                  * but this is safe to do and should be rare. */
1891                 inode_has_no_xattr(inode);
1892         }
1893
1894         if (!rc)
1895                 ll_stats_ops_tally(ll_i2sbi(inode), attr->ia_valid & ATTR_SIZE ?
1896                                         LPROC_LL_TRUNC : LPROC_LL_SETATTR,
1897                                    ktime_us_delta(ktime_get(), kstart));
1898
1899         return rc;
1900 }
1901
1902 int ll_setattr(struct dentry *de, struct iattr *attr)
1903 {
1904         int mode = de->d_inode->i_mode;
1905         enum op_xvalid xvalid = 0;
1906
1907         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1908                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1909                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1910
1911         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1912                                (ATTR_SIZE|ATTR_MODE)) &&
1913             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1914              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1915               !(attr->ia_mode & S_ISGID))))
1916                 attr->ia_valid |= ATTR_FORCE;
1917
1918         if ((attr->ia_valid & ATTR_MODE) &&
1919             (mode & S_ISUID) &&
1920             !(attr->ia_mode & S_ISUID) &&
1921             !(attr->ia_valid & ATTR_KILL_SUID))
1922                 attr->ia_valid |= ATTR_KILL_SUID;
1923
1924         if ((attr->ia_valid & ATTR_MODE) &&
1925             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1926             !(attr->ia_mode & S_ISGID) &&
1927             !(attr->ia_valid & ATTR_KILL_SGID))
1928                 attr->ia_valid |= ATTR_KILL_SGID;
1929
1930         return ll_setattr_raw(de, attr, xvalid, false);
1931 }
1932
1933 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1934                        u32 flags)
1935 {
1936         struct obd_statfs obd_osfs = { 0 };
1937         time64_t max_age;
1938         int rc;
1939
1940         ENTRY;
1941         max_age = ktime_get_seconds() - sbi->ll_statfs_max_age;
1942
1943         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1944                 flags |= OBD_STATFS_NODELAY;
1945
1946         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1947         if (rc)
1948                 RETURN(rc);
1949
1950         osfs->os_type = LL_SUPER_MAGIC;
1951
1952         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1953               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1954
1955         if (osfs->os_state & OS_STATE_SUM)
1956                 GOTO(out, rc);
1957
1958         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1959         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
1960                 GOTO(out, rc = 0);
1961
1962         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1963                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1964                obd_osfs.os_files);
1965
1966         osfs->os_bsize = obd_osfs.os_bsize;
1967         osfs->os_blocks = obd_osfs.os_blocks;
1968         osfs->os_bfree = obd_osfs.os_bfree;
1969         osfs->os_bavail = obd_osfs.os_bavail;
1970
1971         /* If we have _some_ OSTs, but don't have as many free objects on the
1972          * OSTs as inodes on the MDTs, reduce the reported number of inodes
1973          * to compensate, so that the "inodes in use" number is correct.
1974          * This should be kept in sync with lod_statfs() behaviour.
1975          */
1976         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1977                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1978                                  obd_osfs.os_ffree;
1979                 osfs->os_ffree = obd_osfs.os_ffree;
1980         }
1981
1982 out:
1983         RETURN(rc);
1984 }
1985
1986 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1987 {
1988         struct super_block *sb = de->d_sb;
1989         struct obd_statfs osfs;
1990         __u64 fsid = huge_encode_dev(sb->s_dev);
1991         ktime_t kstart = ktime_get();
1992         int rc;
1993
1994         CDEBUG(D_VFSTRACE, "VFS Op:sb=%s (%p)\n", sb->s_id, sb);
1995
1996         /* Some amount of caching on the client is allowed */
1997         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1998         if (rc)
1999                 return rc;
2000
2001         statfs_unpack(sfs, &osfs);
2002
2003         /* We need to downshift for all 32-bit kernels, because we can't
2004          * tell if the kernel is being called via sys_statfs64() or not.
2005          * Stop before overflowing f_bsize - in which case it is better
2006          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
2007         if (sizeof(long) < 8) {
2008                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
2009                         sfs->f_bsize <<= 1;
2010
2011                         osfs.os_blocks >>= 1;
2012                         osfs.os_bfree >>= 1;
2013                         osfs.os_bavail >>= 1;
2014                 }
2015         }
2016
2017         sfs->f_blocks = osfs.os_blocks;
2018         sfs->f_bfree = osfs.os_bfree;
2019         sfs->f_bavail = osfs.os_bavail;
2020         sfs->f_fsid.val[0] = (__u32)fsid;
2021         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
2022
2023         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STATFS,
2024                            ktime_us_delta(ktime_get(), kstart));
2025
2026         return 0;
2027 }
2028
2029 void ll_inode_size_lock(struct inode *inode)
2030 {
2031         struct ll_inode_info *lli;
2032
2033         LASSERT(!S_ISDIR(inode->i_mode));
2034
2035         lli = ll_i2info(inode);
2036         mutex_lock(&lli->lli_size_mutex);
2037 }
2038
2039 void ll_inode_size_unlock(struct inode *inode)
2040 {
2041         struct ll_inode_info *lli;
2042
2043         lli = ll_i2info(inode);
2044         mutex_unlock(&lli->lli_size_mutex);
2045 }
2046
2047 void ll_update_inode_flags(struct inode *inode, int ext_flags)
2048 {
2049         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
2050         if (ext_flags & LUSTRE_PROJINHERIT_FL)
2051                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
2052         else
2053                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
2054 }
2055
2056 int ll_update_inode(struct inode *inode, struct lustre_md *md)
2057 {
2058         struct ll_inode_info *lli = ll_i2info(inode);
2059         struct mdt_body *body = md->body;
2060         struct ll_sb_info *sbi = ll_i2sbi(inode);
2061         int rc = 0;
2062
2063         if (body->mbo_valid & OBD_MD_FLEASIZE) {
2064                 rc = cl_file_inode_init(inode, md);
2065                 if (rc)
2066                         return rc;
2067         }
2068
2069         if (S_ISDIR(inode->i_mode)) {
2070                 rc = ll_update_lsm_md(inode, md);
2071                 if (rc != 0)
2072                         return rc;
2073         }
2074
2075 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2076         if (body->mbo_valid & OBD_MD_FLACL) {
2077                 spin_lock(&lli->lli_lock);
2078                 if (lli->lli_posix_acl)
2079                         posix_acl_release(lli->lli_posix_acl);
2080                 lli->lli_posix_acl = md->posix_acl;
2081                 spin_unlock(&lli->lli_lock);
2082         }
2083 #endif
2084         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
2085                                         sbi->ll_flags & LL_SBI_32BIT_API);
2086         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
2087
2088         if (body->mbo_valid & OBD_MD_FLATIME) {
2089                 if (body->mbo_atime > inode->i_atime.tv_sec)
2090                         inode->i_atime.tv_sec = body->mbo_atime;
2091                 lli->lli_atime = body->mbo_atime;
2092         }
2093
2094         if (body->mbo_valid & OBD_MD_FLMTIME) {
2095                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
2096                         CDEBUG(D_INODE,
2097                                "setting ino %lu mtime from %lld to %llu\n",
2098                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
2099                                body->mbo_mtime);
2100                         inode->i_mtime.tv_sec = body->mbo_mtime;
2101                 }
2102                 lli->lli_mtime = body->mbo_mtime;
2103         }
2104
2105         if (body->mbo_valid & OBD_MD_FLCTIME) {
2106                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2107                         inode->i_ctime.tv_sec = body->mbo_ctime;
2108                 lli->lli_ctime = body->mbo_ctime;
2109         }
2110
2111         /* Clear i_flags to remove S_NOSEC before permissions are updated */
2112         if (body->mbo_valid & OBD_MD_FLFLAGS)
2113                 ll_update_inode_flags(inode, body->mbo_flags);
2114         if (body->mbo_valid & OBD_MD_FLMODE)
2115                 inode->i_mode = (inode->i_mode & S_IFMT) |
2116                                 (body->mbo_mode & ~S_IFMT);
2117
2118         if (body->mbo_valid & OBD_MD_FLTYPE)
2119                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2120                                 (body->mbo_mode & S_IFMT);
2121
2122         LASSERT(inode->i_mode != 0);
2123         if (S_ISREG(inode->i_mode))
2124                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
2125                                        LL_MAX_BLKSIZE_BITS);
2126         else
2127                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2128
2129         if (body->mbo_valid & OBD_MD_FLUID)
2130                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2131         if (body->mbo_valid & OBD_MD_FLGID)
2132                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2133         if (body->mbo_valid & OBD_MD_FLPROJID)
2134                 lli->lli_projid = body->mbo_projid;
2135         if (body->mbo_valid & OBD_MD_FLNLINK)
2136                 set_nlink(inode, body->mbo_nlink);
2137         if (body->mbo_valid & OBD_MD_FLRDEV)
2138                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2139
2140         if (body->mbo_valid & OBD_MD_FLID) {
2141                 /* FID shouldn't be changed! */
2142                 if (fid_is_sane(&lli->lli_fid)) {
2143                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2144                                  "Trying to change FID "DFID
2145                                  " to the "DFID", inode "DFID"(%p)\n",
2146                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2147                                  PFID(ll_inode2fid(inode)), inode);
2148                 } else {
2149                         lli->lli_fid = body->mbo_fid1;
2150                 }
2151         }
2152
2153         LASSERT(fid_seq(&lli->lli_fid) != 0);
2154
2155         if (body->mbo_valid & OBD_MD_FLSIZE) {
2156                 i_size_write(inode, body->mbo_size);
2157
2158                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2159                        PFID(ll_inode2fid(inode)),
2160                        (unsigned long long)body->mbo_size);
2161
2162                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2163                         inode->i_blocks = body->mbo_blocks;
2164         }
2165
2166         if (body->mbo_valid & OBD_MD_TSTATE) {
2167                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2168                  * clear it when done to ensure to start again
2169                  * glimpsing updated attrs
2170                  */
2171                 if (body->mbo_t_state & MS_RESTORE)
2172                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2173                 else
2174                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2175         }
2176
2177         return 0;
2178 }
2179
2180 int ll_read_inode2(struct inode *inode, void *opaque)
2181 {
2182         struct lustre_md *md = opaque;
2183         struct ll_inode_info *lli = ll_i2info(inode);
2184         int     rc;
2185         ENTRY;
2186
2187         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2188                PFID(&lli->lli_fid), inode);
2189
2190         /* Core attributes from the MDS first.  This is a new inode, and
2191          * the VFS doesn't zero times in the core inode so we have to do
2192          * it ourselves.  They will be overwritten by either MDS or OST
2193          * attributes - we just need to make sure they aren't newer.
2194          */
2195         inode->i_mtime.tv_sec = 0;
2196         inode->i_atime.tv_sec = 0;
2197         inode->i_ctime.tv_sec = 0;
2198         inode->i_rdev = 0;
2199         rc = ll_update_inode(inode, md);
2200         if (rc != 0)
2201                 RETURN(rc);
2202
2203         /* OIDEBUG(inode); */
2204
2205 #ifdef HAVE_BACKING_DEV_INFO
2206         /* initializing backing dev info. */
2207         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2208 #endif
2209         if (S_ISREG(inode->i_mode)) {
2210                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2211                 inode->i_op = &ll_file_inode_operations;
2212                 inode->i_fop = sbi->ll_fop;
2213                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2214                 EXIT;
2215         } else if (S_ISDIR(inode->i_mode)) {
2216                 inode->i_op = &ll_dir_inode_operations;
2217                 inode->i_fop = &ll_dir_operations;
2218                 EXIT;
2219         } else if (S_ISLNK(inode->i_mode)) {
2220                 inode->i_op = &ll_fast_symlink_inode_operations;
2221                 EXIT;
2222         } else {
2223                 inode->i_op = &ll_special_inode_operations;
2224
2225                 init_special_inode(inode, inode->i_mode,
2226                                    inode->i_rdev);
2227
2228                 EXIT;
2229         }
2230
2231         return 0;
2232 }
2233
2234 void ll_delete_inode(struct inode *inode)
2235 {
2236         struct ll_inode_info *lli = ll_i2info(inode);
2237         struct address_space *mapping = &inode->i_data;
2238         unsigned long nrpages;
2239         unsigned long flags;
2240
2241         ENTRY;
2242
2243         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2244                 /* It is last chance to write out dirty pages,
2245                  * otherwise we may lose data while umount.
2246                  *
2247                  * If i_nlink is 0 then just discard data. This is safe because
2248                  * local inode gets i_nlink 0 from server only for the last
2249                  * unlink, so that file is not opened somewhere else
2250                  */
2251                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2252                                    CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2253         }
2254         truncate_inode_pages_final(mapping);
2255
2256         /* Workaround for LU-118: Note nrpages may not be totally updated when
2257          * truncate_inode_pages() returns, as there can be a page in the process
2258          * of deletion (inside __delete_from_page_cache()) in the specified
2259          * range. Thus mapping->nrpages can be non-zero when this function
2260          * returns even after truncation of the whole mapping.  Only do this if
2261          * npages isn't already zero.
2262          */
2263         nrpages = mapping->nrpages;
2264         if (nrpages) {
2265                 xa_lock_irqsave(&mapping->i_pages, flags);
2266                 nrpages = mapping->nrpages;
2267                 xa_unlock_irqrestore(&mapping->i_pages, flags);
2268         } /* Workaround end */
2269
2270         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2271                  "see https://jira.whamcloud.com/browse/LU-118\n",
2272                  ll_i2sbi(inode)->ll_fsname,
2273                  PFID(ll_inode2fid(inode)), inode, nrpages);
2274
2275         ll_clear_inode(inode);
2276         clear_inode(inode);
2277
2278         EXIT;
2279 }
2280
2281 int ll_iocontrol(struct inode *inode, struct file *file,
2282                  unsigned int cmd, unsigned long arg)
2283 {
2284         struct ll_sb_info *sbi = ll_i2sbi(inode);
2285         struct ptlrpc_request *req = NULL;
2286         int rc, flags = 0;
2287         ENTRY;
2288
2289         switch (cmd) {
2290         case FS_IOC_GETFLAGS: {
2291                 struct mdt_body *body;
2292                 struct md_op_data *op_data;
2293
2294                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2295                                              0, 0, LUSTRE_OPC_ANY,
2296                                              NULL);
2297                 if (IS_ERR(op_data))
2298                         RETURN(PTR_ERR(op_data));
2299
2300                 op_data->op_valid = OBD_MD_FLFLAGS;
2301                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2302                 ll_finish_md_op_data(op_data);
2303                 if (rc) {
2304                         CERROR("%s: failure inode "DFID": rc = %d\n",
2305                                sbi->ll_md_exp->exp_obd->obd_name,
2306                                PFID(ll_inode2fid(inode)), rc);
2307                         RETURN(-abs(rc));
2308                 }
2309
2310                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2311
2312                 flags = body->mbo_flags;
2313
2314                 ptlrpc_req_finished(req);
2315
2316                 RETURN(put_user(flags, (int __user *)arg));
2317         }
2318         case FS_IOC_SETFLAGS: {
2319                 struct iattr *attr;
2320                 struct md_op_data *op_data;
2321                 struct cl_object *obj;
2322                 struct fsxattr fa = { 0 };
2323
2324                 if (get_user(flags, (int __user *)arg))
2325                         RETURN(-EFAULT);
2326
2327                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2328                 if (flags & LUSTRE_PROJINHERIT_FL)
2329                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2330
2331                 rc = ll_ioctl_check_project(inode, &fa);
2332                 if (rc)
2333                         RETURN(rc);
2334
2335                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2336                                              LUSTRE_OPC_ANY, NULL);
2337                 if (IS_ERR(op_data))
2338                         RETURN(PTR_ERR(op_data));
2339
2340                 op_data->op_attr_flags = flags;
2341                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2342                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2343                 ll_finish_md_op_data(op_data);
2344                 ptlrpc_req_finished(req);
2345                 if (rc)
2346                         RETURN(rc);
2347
2348                 ll_update_inode_flags(inode, flags);
2349
2350                 obj = ll_i2info(inode)->lli_clob;
2351                 if (obj == NULL)
2352                         RETURN(0);
2353
2354                 OBD_ALLOC_PTR(attr);
2355                 if (attr == NULL)
2356                         RETURN(-ENOMEM);
2357
2358                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2359
2360                 OBD_FREE_PTR(attr);
2361                 RETURN(rc);
2362         }
2363         default:
2364                 RETURN(-ENOSYS);
2365         }
2366
2367         RETURN(0);
2368 }
2369
2370 int ll_flush_ctx(struct inode *inode)
2371 {
2372         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2373
2374         CDEBUG(D_SEC, "flush context for user %d\n",
2375                from_kuid(&init_user_ns, current_uid()));
2376
2377         obd_set_info_async(NULL, sbi->ll_md_exp,
2378                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2379                            0, NULL, NULL);
2380         obd_set_info_async(NULL, sbi->ll_dt_exp,
2381                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2382                            0, NULL, NULL);
2383         return 0;
2384 }
2385
2386 /* umount -f client means force down, don't save state */
2387 void ll_umount_begin(struct super_block *sb)
2388 {
2389         struct ll_sb_info *sbi = ll_s2sbi(sb);
2390         struct obd_device *obd;
2391         struct obd_ioctl_data *ioc_data;
2392         int cnt;
2393         ENTRY;
2394
2395         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2396                sb->s_count, atomic_read(&sb->s_active));
2397
2398         obd = class_exp2obd(sbi->ll_md_exp);
2399         if (obd == NULL) {
2400                 CERROR("Invalid MDC connection handle %#llx\n",
2401                        sbi->ll_md_exp->exp_handle.h_cookie);
2402                 EXIT;
2403                 return;
2404         }
2405         obd->obd_force = 1;
2406
2407         obd = class_exp2obd(sbi->ll_dt_exp);
2408         if (obd == NULL) {
2409                 CERROR("Invalid LOV connection handle %#llx\n",
2410                        sbi->ll_dt_exp->exp_handle.h_cookie);
2411                 EXIT;
2412                 return;
2413         }
2414         obd->obd_force = 1;
2415
2416         OBD_ALLOC_PTR(ioc_data);
2417         if (ioc_data) {
2418                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2419                               sizeof *ioc_data, ioc_data, NULL);
2420
2421                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2422                               sizeof *ioc_data, ioc_data, NULL);
2423
2424                 OBD_FREE_PTR(ioc_data);
2425         }
2426
2427         /* Really, we'd like to wait until there are no requests outstanding,
2428          * and then continue.  For now, we just periodically checking for vfs
2429          * to decrement mnt_cnt and hope to finish it within 10sec.
2430          */
2431         cnt = 10;
2432         while (cnt > 0 &&
2433                !may_umount(sbi->ll_mnt.mnt)) {
2434                 ssleep(1);
2435                 cnt -= 1;
2436         }
2437
2438         EXIT;
2439 }
2440
2441 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2442 {
2443         struct ll_sb_info *sbi = ll_s2sbi(sb);
2444         char *profilenm = get_profile_name(sb);
2445         int err;
2446         __u32 read_only;
2447
2448         if ((*flags & MS_RDONLY) != (sb->s_flags & SB_RDONLY)) {
2449                 read_only = *flags & MS_RDONLY;
2450                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2451                                          sizeof(KEY_READ_ONLY),
2452                                          KEY_READ_ONLY, sizeof(read_only),
2453                                          &read_only, NULL);
2454                 if (err) {
2455                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2456                                       profilenm, read_only ?
2457                                       "read-only" : "read-write", err);
2458                         return err;
2459                 }
2460
2461                 if (read_only)
2462                         sb->s_flags |= SB_RDONLY;
2463                 else
2464                         sb->s_flags &= ~SB_RDONLY;
2465
2466                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2467                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2468                                       read_only ?  "read-only" : "read-write");
2469         }
2470         return 0;
2471 }
2472
2473 /**
2474  * Cleanup the open handle that is cached on MDT-side.
2475  *
2476  * For open case, the client side open handling thread may hit error
2477  * after the MDT grant the open. Under such case, the client should
2478  * send close RPC to the MDT as cleanup; otherwise, the open handle
2479  * on the MDT will be leaked there until the client umount or evicted.
2480  *
2481  * In further, if someone unlinked the file, because the open handle
2482  * holds the reference on such file/object, then it will block the
2483  * subsequent threads that want to locate such object via FID.
2484  *
2485  * \param[in] sb        super block for this file-system
2486  * \param[in] open_req  pointer to the original open request
2487  */
2488 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2489 {
2490         struct mdt_body                 *body;
2491         struct md_op_data               *op_data;
2492         struct ptlrpc_request           *close_req = NULL;
2493         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2494         ENTRY;
2495
2496         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2497         OBD_ALLOC_PTR(op_data);
2498         if (op_data == NULL) {
2499                 CWARN("%s: cannot allocate op_data to release open handle for "
2500                       DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2501
2502                 RETURN_EXIT;
2503         }
2504
2505         op_data->op_fid1 = body->mbo_fid1;
2506         op_data->op_open_handle = body->mbo_open_handle;
2507         op_data->op_mod_time = ktime_get_real_seconds();
2508         md_close(exp, op_data, NULL, &close_req);
2509         ptlrpc_req_finished(close_req);
2510         ll_finish_md_op_data(op_data);
2511
2512         EXIT;
2513 }
2514
2515 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2516                   struct super_block *sb, struct lookup_intent *it)
2517 {
2518         struct ll_sb_info *sbi = NULL;
2519         struct lustre_md md = { NULL };
2520         bool default_lmv_deleted = false;
2521         int rc;
2522
2523         ENTRY;
2524
2525         LASSERT(*inode || sb);
2526         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2527         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2528                               sbi->ll_md_exp, &md);
2529         if (rc != 0)
2530                 GOTO(out, rc);
2531
2532         /*
2533          * clear default_lmv only if intent_getattr reply doesn't contain it.
2534          * but it needs to be done after iget, check this early because
2535          * ll_update_lsm_md() may change md.
2536          */
2537         if (it && (it->it_op & (IT_LOOKUP | IT_GETATTR)) &&
2538             S_ISDIR(md.body->mbo_mode) && !md.default_lmv)
2539                 default_lmv_deleted = true;
2540
2541         if (*inode) {
2542                 rc = ll_update_inode(*inode, &md);
2543                 if (rc != 0)
2544                         GOTO(out, rc);
2545         } else {
2546                 LASSERT(sb != NULL);
2547
2548                 /*
2549                  * At this point server returns to client's same fid as client
2550                  * generated for creating. So using ->fid1 is okay here.
2551                  */
2552                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2553                         CERROR("%s: Fid is insane "DFID"\n",
2554                                 sbi->ll_fsname,
2555                                 PFID(&md.body->mbo_fid1));
2556                         GOTO(out, rc = -EINVAL);
2557                 }
2558
2559                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2560                                              sbi->ll_flags & LL_SBI_32BIT_API),
2561                                  &md);
2562                 if (IS_ERR(*inode)) {
2563 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2564                         if (md.posix_acl) {
2565                                 posix_acl_release(md.posix_acl);
2566                                 md.posix_acl = NULL;
2567                         }
2568 #endif
2569                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2570                         *inode = NULL;
2571                         CERROR("new_inode -fatal: rc %d\n", rc);
2572                         GOTO(out, rc);
2573                 }
2574         }
2575
2576         /* Handling piggyback layout lock.
2577          * Layout lock can be piggybacked by getattr and open request.
2578          * The lsm can be applied to inode only if it comes with a layout lock
2579          * otherwise correct layout may be overwritten, for example:
2580          * 1. proc1: mdt returns a lsm but not granting layout
2581          * 2. layout was changed by another client
2582          * 3. proc2: refresh layout and layout lock granted
2583          * 4. proc1: to apply a stale layout */
2584         if (it != NULL && it->it_lock_mode != 0) {
2585                 struct lustre_handle lockh;
2586                 struct ldlm_lock *lock;
2587
2588                 lockh.cookie = it->it_lock_handle;
2589                 lock = ldlm_handle2lock(&lockh);
2590                 LASSERT(lock != NULL);
2591                 if (ldlm_has_layout(lock)) {
2592                         struct cl_object_conf conf;
2593
2594                         memset(&conf, 0, sizeof(conf));
2595                         conf.coc_opc = OBJECT_CONF_SET;
2596                         conf.coc_inode = *inode;
2597                         conf.coc_lock = lock;
2598                         conf.u.coc_layout = md.layout;
2599                         (void)ll_layout_conf(*inode, &conf);
2600                 }
2601                 LDLM_LOCK_PUT(lock);
2602         }
2603
2604         if (default_lmv_deleted)
2605                 ll_update_default_lsm_md(*inode, &md);
2606
2607         GOTO(out, rc = 0);
2608
2609 out:
2610         /* cleanup will be done if necessary */
2611         md_free_lustre_md(sbi->ll_md_exp, &md);
2612
2613         if (rc != 0 && it != NULL && it->it_op & IT_OPEN) {
2614                 ll_intent_drop_lock(it);
2615                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2616         }
2617
2618         return rc;
2619 }
2620
2621 int ll_obd_statfs(struct inode *inode, void __user *arg)
2622 {
2623         struct ll_sb_info *sbi = NULL;
2624         struct obd_export *exp;
2625         char *buf = NULL;
2626         struct obd_ioctl_data *data = NULL;
2627         __u32 type;
2628         int len = 0, rc;
2629
2630         if (!inode || !(sbi = ll_i2sbi(inode)))
2631                 GOTO(out_statfs, rc = -EINVAL);
2632
2633         rc = obd_ioctl_getdata(&buf, &len, arg);
2634         if (rc)
2635                 GOTO(out_statfs, rc);
2636
2637         data = (void*)buf;
2638         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2639             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2640                 GOTO(out_statfs, rc = -EINVAL);
2641
2642         if (data->ioc_inllen1 != sizeof(__u32) ||
2643             data->ioc_inllen2 != sizeof(__u32) ||
2644             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2645             data->ioc_plen2 != sizeof(struct obd_uuid))
2646                 GOTO(out_statfs, rc = -EINVAL);
2647
2648         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2649         if (type & LL_STATFS_LMV)
2650                 exp = sbi->ll_md_exp;
2651         else if (type & LL_STATFS_LOV)
2652                 exp = sbi->ll_dt_exp;
2653         else
2654                 GOTO(out_statfs, rc = -ENODEV);
2655
2656         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2657         if (rc)
2658                 GOTO(out_statfs, rc);
2659 out_statfs:
2660         OBD_FREE_LARGE(buf, len);
2661         return rc;
2662 }
2663
2664 /*
2665  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2666  * be called early to avoid deadlock.
2667  */
2668 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2669 {
2670         if (op_data->op_mea2_sem) {
2671                 up_read(op_data->op_mea2_sem);
2672                 op_data->op_mea2_sem = NULL;
2673         }
2674
2675         if (op_data->op_mea1_sem) {
2676                 up_read(op_data->op_mea1_sem);
2677                 op_data->op_mea1_sem = NULL;
2678         }
2679 }
2680
2681 /* this function prepares md_op_data hint for passing it down to MD stack. */
2682 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2683                                       struct inode *i1, struct inode *i2,
2684                                       const char *name, size_t namelen,
2685                                       __u32 mode, enum md_op_code opc,
2686                                       void *data)
2687 {
2688         LASSERT(i1 != NULL);
2689
2690         if (name == NULL) {
2691                 /* Do not reuse namelen for something else. */
2692                 if (namelen != 0)
2693                         return ERR_PTR(-EINVAL);
2694         } else {
2695                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2696                         return ERR_PTR(-ENAMETOOLONG);
2697
2698                 if (!lu_name_is_valid_2(name, namelen))
2699                         return ERR_PTR(-EINVAL);
2700         }
2701
2702         if (op_data == NULL)
2703                 OBD_ALLOC_PTR(op_data);
2704
2705         if (op_data == NULL)
2706                 return ERR_PTR(-ENOMEM);
2707
2708         ll_i2gids(op_data->op_suppgids, i1, i2);
2709         op_data->op_fid1 = *ll_inode2fid(i1);
2710         op_data->op_code = opc;
2711
2712         if (S_ISDIR(i1->i_mode)) {
2713                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2714                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2715                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2716                 op_data->op_default_mea1 = ll_i2info(i1)->lli_default_lsm_md;
2717         }
2718
2719         if (i2) {
2720                 op_data->op_fid2 = *ll_inode2fid(i2);
2721                 if (S_ISDIR(i2->i_mode)) {
2722                         if (i2 != i1) {
2723                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2724                                 op_data->op_mea2_sem =
2725                                                 &ll_i2info(i2)->lli_lsm_sem;
2726                         }
2727                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2728                 }
2729         } else {
2730                 fid_zero(&op_data->op_fid2);
2731         }
2732
2733         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2734                 op_data->op_cli_flags |= CLI_HASH64;
2735
2736         if (ll_need_32bit_api(ll_i2sbi(i1)))
2737                 op_data->op_cli_flags |= CLI_API32;
2738
2739         op_data->op_name = name;
2740         op_data->op_namelen = namelen;
2741         op_data->op_mode = mode;
2742         op_data->op_mod_time = ktime_get_real_seconds();
2743         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2744         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2745         op_data->op_cap = cfs_curproc_cap_pack();
2746         op_data->op_mds = 0;
2747         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2748              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2749                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2750         }
2751         op_data->op_data = data;
2752
2753         return op_data;
2754 }
2755
2756 void ll_finish_md_op_data(struct md_op_data *op_data)
2757 {
2758         ll_unlock_md_op_lsm(op_data);
2759         security_release_secctx(op_data->op_file_secctx,
2760                                 op_data->op_file_secctx_size);
2761         OBD_FREE_PTR(op_data);
2762 }
2763
2764 #ifdef HAVE_SUPEROPS_USE_DENTRY
2765 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2766 #else
2767 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2768 #endif
2769 {
2770         struct ll_sb_info *sbi;
2771
2772 #ifdef HAVE_SUPEROPS_USE_DENTRY
2773         LASSERT((seq != NULL) && (dentry != NULL));
2774         sbi = ll_s2sbi(dentry->d_sb);
2775 #else
2776         LASSERT((seq != NULL) && (vfs != NULL));
2777         sbi = ll_s2sbi(vfs->mnt_sb);
2778 #endif
2779
2780         if (sbi->ll_flags & LL_SBI_NOLCK)
2781                 seq_puts(seq, ",nolock");
2782
2783         /* "flock" is the default since 2.13, but it wasn't for many years,
2784          * so it is still useful to print this to show it is enabled.
2785          * Start to print "noflock" so it is now clear when flock is disabled.
2786          */
2787         if (sbi->ll_flags & LL_SBI_FLOCK)
2788                 seq_puts(seq, ",flock");
2789         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2790                 seq_puts(seq, ",localflock");
2791         else
2792                 seq_puts(seq, ",noflock");
2793
2794         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2795                 seq_puts(seq, ",user_xattr");
2796
2797         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2798                 seq_puts(seq, ",lazystatfs");
2799
2800         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2801                 seq_puts(seq, ",user_fid2path");
2802
2803         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2804                 seq_puts(seq, ",always_ping");
2805
2806         RETURN(0);
2807 }
2808
2809 /**
2810  * Get obd name by cmd, and copy out to user space
2811  */
2812 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2813 {
2814         struct ll_sb_info *sbi = ll_i2sbi(inode);
2815         struct obd_device *obd;
2816         ENTRY;
2817
2818         if (cmd == OBD_IOC_GETDTNAME)
2819                 obd = class_exp2obd(sbi->ll_dt_exp);
2820         else if (cmd == OBD_IOC_GETMDNAME)
2821                 obd = class_exp2obd(sbi->ll_md_exp);
2822         else
2823                 RETURN(-EINVAL);
2824
2825         if (!obd)
2826                 RETURN(-ENOENT);
2827
2828         if (copy_to_user((void __user *)arg, obd->obd_name,
2829                          strlen(obd->obd_name) + 1))
2830                 RETURN(-EFAULT);
2831
2832         RETURN(0);
2833 }
2834
2835 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2836 {
2837         char *path = NULL;
2838
2839         struct path p;
2840
2841         p.dentry = dentry;
2842         p.mnt = current->fs->root.mnt;
2843         path_get(&p);
2844         path = d_path(&p, buf, bufsize);
2845         path_put(&p);
2846         return path;
2847 }
2848
2849 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2850 {
2851         char *buf, *path = NULL;
2852         struct dentry *dentry = NULL;
2853         struct inode *inode = page->mapping->host;
2854
2855         /* this can be called inside spin lock so use GFP_ATOMIC. */
2856         buf = (char *)__get_free_page(GFP_ATOMIC);
2857         if (buf != NULL) {
2858                 dentry = d_find_alias(page->mapping->host);
2859                 if (dentry != NULL)
2860                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2861         }
2862
2863         /* The below message is checked in recovery-small.sh test_24b */
2864         CDEBUG(D_WARNING,
2865                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2866                "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
2867                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2868                PFID(ll_inode2fid(inode)),
2869                (path && !IS_ERR(path)) ? path : "", ioret);
2870
2871         if (dentry != NULL)
2872                 dput(dentry);
2873
2874         if (buf != NULL)
2875                 free_page((unsigned long)buf);
2876 }
2877
2878 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2879                         struct lov_user_md **kbuf)
2880 {
2881         struct lov_user_md      lum;
2882         ssize_t                 lum_size;
2883         ENTRY;
2884
2885         if (copy_from_user(&lum, md, sizeof(lum)))
2886                 RETURN(-EFAULT);
2887
2888         lum_size = ll_lov_user_md_size(&lum);
2889         if (lum_size < 0)
2890                 RETURN(lum_size);
2891
2892         OBD_ALLOC_LARGE(*kbuf, lum_size);
2893         if (*kbuf == NULL)
2894                 RETURN(-ENOMEM);
2895
2896         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2897                 OBD_FREE_LARGE(*kbuf, lum_size);
2898                 RETURN(-EFAULT);
2899         }
2900
2901         RETURN(lum_size);
2902 }
2903
2904 /*
2905  * Compute llite root squash state after a change of root squash
2906  * configuration setting or add/remove of a lnet nid
2907  */
2908 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2909 {
2910         struct root_squash_info *squash = &sbi->ll_squash;
2911         int i;
2912         bool matched;
2913         struct lnet_process_id id;
2914
2915         /* Update norootsquash flag */
2916         spin_lock(&squash->rsi_lock);
2917         if (list_empty(&squash->rsi_nosquash_nids))
2918                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2919         else {
2920                 /* Do not apply root squash as soon as one of our NIDs is
2921                  * in the nosquash_nids list */
2922                 matched = false;
2923                 i = 0;
2924                 while (LNetGetId(i++, &id) != -ENOENT) {
2925                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2926                                 continue;
2927                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2928                                 matched = true;
2929                                 break;
2930                         }
2931                 }
2932                 if (matched)
2933                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2934                 else
2935                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2936         }
2937         spin_unlock(&squash->rsi_lock);
2938 }
2939
2940 /**
2941  * Parse linkea content to extract information about a given hardlink
2942  *
2943  * \param[in]   ldata      - Initialized linkea data
2944  * \param[in]   linkno     - Link identifier
2945  * \param[out]  parent_fid - The entry's parent FID
2946  * \param[out]  ln         - Entry name destination buffer
2947  *
2948  * \retval 0 on success
2949  * \retval Appropriate negative error code on failure
2950  */
2951 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2952                             struct lu_fid *parent_fid, struct lu_name *ln)
2953 {
2954         unsigned int    idx;
2955         int             rc;
2956         ENTRY;
2957
2958         rc = linkea_init_with_rec(ldata);
2959         if (rc < 0)
2960                 RETURN(rc);
2961
2962         if (linkno >= ldata->ld_leh->leh_reccount)
2963                 /* beyond last link */
2964                 RETURN(-ENODATA);
2965
2966         linkea_first_entry(ldata);
2967         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2968                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2969                                     parent_fid);
2970                 if (idx == linkno)
2971                         break;
2972
2973                 linkea_next_entry(ldata);
2974         }
2975
2976         if (idx < linkno)
2977                 RETURN(-ENODATA);
2978
2979         RETURN(0);
2980 }
2981
2982 /**
2983  * Get parent FID and name of an identified link. Operation is performed for
2984  * a given link number, letting the caller iterate over linkno to list one or
2985  * all links of an entry.
2986  *
2987  * \param[in]     file - File descriptor against which to perform the operation
2988  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2989  *                       on and the available size. It is eventually filled with
2990  *                       the requested information or left untouched on error
2991  *
2992  * \retval - 0 on success
2993  * \retval - Appropriate negative error code on failure
2994  */
2995 int ll_getparent(struct file *file, struct getparent __user *arg)
2996 {
2997         struct inode            *inode = file_inode(file);
2998         struct linkea_data      *ldata;
2999         struct lu_buf            buf = LU_BUF_NULL;
3000         struct lu_name           ln;
3001         struct lu_fid            parent_fid;
3002         __u32                    linkno;
3003         __u32                    name_size;
3004         int                      rc;
3005
3006         ENTRY;
3007
3008         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
3009             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
3010                 RETURN(-EPERM);
3011
3012         if (get_user(name_size, &arg->gp_name_size))
3013                 RETURN(-EFAULT);
3014
3015         if (get_user(linkno, &arg->gp_linkno))
3016                 RETURN(-EFAULT);
3017
3018         if (name_size > PATH_MAX)
3019                 RETURN(-EINVAL);
3020
3021         OBD_ALLOC(ldata, sizeof(*ldata));
3022         if (ldata == NULL)
3023                 RETURN(-ENOMEM);
3024
3025         rc = linkea_data_new(ldata, &buf);
3026         if (rc < 0)
3027                 GOTO(ldata_free, rc);
3028
3029         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
3030                            buf.lb_len, OBD_MD_FLXATTR);
3031         if (rc < 0)
3032                 GOTO(lb_free, rc);
3033
3034         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
3035         if (rc < 0)
3036                 GOTO(lb_free, rc);
3037
3038         if (ln.ln_namelen >= name_size)
3039                 GOTO(lb_free, rc = -EOVERFLOW);
3040
3041         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
3042                 GOTO(lb_free, rc = -EFAULT);
3043
3044         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
3045                 GOTO(lb_free, rc = -EFAULT);
3046
3047         if (put_user('\0', arg->gp_name + ln.ln_namelen))
3048                 GOTO(lb_free, rc = -EFAULT);
3049
3050 lb_free:
3051         lu_buf_free(&buf);
3052 ldata_free:
3053         OBD_FREE(ldata, sizeof(*ldata));
3054
3055         RETURN(rc);
3056 }