lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/statfs.h>
  41 #include <linux/time.h>
  42 #include <linux/types.h>
  43 #include <linux/version.h>
  44 #include <linux/mm.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <linux/security.h>
  50
  51 #include <uapi/linux/lustre_ioctl.h>
  52 #include <lustre_ha.h>
  53 #include <lustre_dlm.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_disk.h>
  56 #include <uapi/linux/lustre_param.h>
  57 #include <lustre_log.h>
  58 #include <cl_object.h>
  59 #include <obd_cksum.h>
  60 #include "llite_internal.h"
  61
  62 struct kmem_cache *ll_file_data_slab;
  63
  64 #ifndef log2
  65 #define log2(n) ffz(~(n))
  66 #endif
  67
  68 static struct ll_sb_info *ll_init_sbi(void)
  69 {
  70         struct ll_sb_info *sbi = NULL;
  71         unsigned long pages;
  72         unsigned long lru_page_max;
  73         struct sysinfo si;
  74         class_uuid_t uuid;
  75         int i;
  76         ENTRY;
  77
  78         OBD_ALLOC_PTR(sbi);
  79         if (sbi == NULL)
  80                 RETURN(NULL);
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         lru_page_max = pages / 2;
  91
  92         /* initialize ll_cache data */
  93         sbi->ll_cache = cl_cache_init(lru_page_max);
  94         if (sbi->ll_cache == NULL) {
  95                 OBD_FREE(sbi, sizeof(*sbi));
  96                 RETURN(NULL);
  97         }
  98
  99         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 100                                            SBI_DEFAULT_READAHEAD_MAX);
 101         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 102         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 103                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 104
 105         ll_generate_random_uuid(uuid);
 106         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 107         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 108
 109         sbi->ll_flags |= LL_SBI_VERBOSE;
 110 #ifdef ENABLE_CHECKSUM
 111         sbi->ll_flags |= LL_SBI_CHECKSUM;
 112 #endif
 113
 114 #ifdef HAVE_LRU_RESIZE_SUPPORT
 115         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 116 #endif
 117         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 118
 119         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 120                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 121                                pp_r_hist.oh_lock);
 122                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 123                                pp_w_hist.oh_lock);
 124         }
 125
 126         /* metadata statahead is enabled by default */
 127         sbi->ll_sa_max = LL_SA_RPC_DEF;
 128         atomic_set(&sbi->ll_sa_total, 0);
 129         atomic_set(&sbi->ll_sa_wrong, 0);
 130         atomic_set(&sbi->ll_sa_running, 0);
 131         atomic_set(&sbi->ll_agl_total, 0);
 132         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 133         sbi->ll_flags |= LL_SBI_FAST_READ;
 134
 135         /* root squash */
 136         sbi->ll_squash.rsi_uid = 0;
 137         sbi->ll_squash.rsi_gid = 0;
 138         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 139         init_rwsem(&sbi->ll_squash.rsi_sem);
 140
 141         RETURN(sbi);
 142 }
 143
 144 static void ll_free_sbi(struct super_block *sb)
 145 {
 146         struct ll_sb_info *sbi = ll_s2sbi(sb);
 147         ENTRY;
 148
 149         if (sbi != NULL) {
 150                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 151                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 152                 if (sbi->ll_cache != NULL) {
 153                         cl_cache_decref(sbi->ll_cache);
 154                         sbi->ll_cache = NULL;
 155                 }
 156                 OBD_FREE(sbi, sizeof(*sbi));
 157         }
 158         EXIT;
 159 }
 160
 161 static inline int obd_connect_has_secctx(struct obd_connect_data *data)
 162 {
 163         return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
 164                data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX;
 165 }
 166
 167 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 168                                     struct vfsmount *mnt)
 169 {
 170         struct inode *root = NULL;
 171         struct ll_sb_info *sbi = ll_s2sbi(sb);
 172         struct obd_device *obd;
 173         struct obd_statfs *osfs = NULL;
 174         struct ptlrpc_request *request = NULL;
 175         struct obd_connect_data *data = NULL;
 176         struct obd_uuid *uuid;
 177         struct md_op_data *op_data;
 178         struct lustre_md lmd;
 179         u64 valid;
 180         int size, err, checksum;
 181         ENTRY;
 182
 183         obd = class_name2obd(md);
 184         if (!obd) {
 185                 CERROR("MD %s: not setup or attached\n", md);
 186                 RETURN(-EINVAL);
 187         }
 188
 189         OBD_ALLOC_PTR(data);
 190         if (data == NULL)
 191                 RETURN(-ENOMEM);
 192
 193         OBD_ALLOC_PTR(osfs);
 194         if (osfs == NULL) {
 195                 OBD_FREE_PTR(data);
 196                 RETURN(-ENOMEM);
 197         }
 198
 199         /* indicate the features supported by this client */
 200         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 201                                   OBD_CONNECT_ATTRFID  |
 202                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 203                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 204                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 205                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 206                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 207                                   OBD_CONNECT_64BITHASH |
 208                                   OBD_CONNECT_EINPROGRESS |
 209                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 210                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 211                                   OBD_CONNECT_MAX_EASIZE |
 212                                   OBD_CONNECT_FLOCK_DEAD |
 213                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 214                                   OBD_CONNECT_OPEN_BY_FID |
 215                                   OBD_CONNECT_DIR_STRIPE |
 216                                   OBD_CONNECT_BULK_MBITS |
 217                                   OBD_CONNECT_SUBTREE |
 218                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_MULTIMODRPCS;
 219
 220         data->ocd_connect_flags2 = 0;
 221
 222 #ifdef HAVE_LRU_RESIZE_SUPPORT
 223         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 224                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 225 #endif
 226 #ifdef CONFIG_FS_POSIX_ACL
 227         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 228                                    OBD_CONNECT_LARGE_ACL;
 229 #endif
 230
 231         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 232                 /* flag mdc connection as lightweight, only used for test
 233                  * purpose, use with care */
 234                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 235
 236         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 237         data->ocd_version = LUSTRE_VERSION_CODE;
 238
 239         if (sb->s_flags & MS_RDONLY)
 240                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 241         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 242                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 243
 244 #ifdef MS_NOSEC
 245         /* Setting this indicates we correctly support S_NOSEC (See kernel
 246          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 247          */
 248         sb->s_flags |= MS_NOSEC;
 249 #endif
 250
 251         if (sbi->ll_flags & LL_SBI_FLOCK)
 252                 sbi->ll_fop = &ll_file_operations_flock;
 253         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 254                 sbi->ll_fop = &ll_file_operations;
 255         else
 256                 sbi->ll_fop = &ll_file_operations_noflock;
 257
 258         /* always ping even if server suppress_pings */
 259         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 260                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 261
 262 #ifdef HAVE_SECURITY_DENTRY_INIT_SECURITY
 263         data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
 264 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
 265
 266         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 267
 268         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 269         if (err == -EBUSY) {
 270                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 271                                    "recovery, of which this client is not a "
 272                                    "part. Please wait for recovery to complete,"
 273                                    " abort, or time out.\n", md);
 274                 GOTO(out, err);
 275         } else if (err) {
 276                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 277                 GOTO(out, err);
 278         }
 279
 280         sbi->ll_md_exp->exp_connect_data = *data;
 281
 282         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 283                            LUSTRE_SEQ_METADATA);
 284         if (err) {
 285                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 286                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 287                 GOTO(out_md, err);
 288         }
 289
 290         /* For mount, we only need fs info from MDT0, and also in DNE, it
 291          * can make sure the client can be mounted as long as MDT0 is
 292          * avaible */
 293         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 294                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 295                         OBD_STATFS_FOR_MDT0);
 296         if (err)
 297                 GOTO(out_md_fid, err);
 298
 299         /* This needs to be after statfs to ensure connect has finished.
 300          * Note that "data" does NOT contain the valid connect reply.
 301          * If connecting to a 1.8 server there will be no LMV device, so
 302          * we can access the MDC export directly and exp_connect_flags will
 303          * be non-zero, but if accessing an upgraded 2.1 server it will
 304          * have the correct flags filled in.
 305          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 306         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 307         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 308             valid != CLIENT_CONNECT_MDT_REQD) {
 309                 char *buf;
 310
 311                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 312                 obd_connect_flags2str(buf, PAGE_SIZE,
 313                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 314                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 315                                    "feature(s) needed for correct operation "
 316                                    "of this client (%s). Please upgrade "
 317                                    "server or downgrade client.\n",
 318                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 319                 OBD_FREE(buf, PAGE_SIZE);
 320                 GOTO(out_md_fid, err = -EPROTO);
 321         }
 322
 323         size = sizeof(*data);
 324         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 325                            KEY_CONN_DATA,  &size, data);
 326         if (err) {
 327                 CERROR("%s: Get connect data failed: rc = %d\n",
 328                        sbi->ll_md_exp->exp_obd->obd_name, err);
 329                 GOTO(out_md_fid, err);
 330         }
 331
 332         LASSERT(osfs->os_bsize);
 333         sb->s_blocksize = osfs->os_bsize;
 334         sb->s_blocksize_bits = log2(osfs->os_bsize);
 335         sb->s_magic = LL_SUPER_MAGIC;
 336         sb->s_maxbytes = MAX_LFS_FILESIZE;
 337         sbi->ll_namelen = osfs->os_namelen;
 338         sbi->ll_mnt.mnt = current->fs->root.mnt;
 339
 340         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 341             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 342                 LCONSOLE_INFO("Disabling user_xattr feature because "
 343                               "it is not supported on the server\n");
 344                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 345         }
 346
 347         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 348 #ifdef MS_POSIXACL
 349                 sb->s_flags |= MS_POSIXACL;
 350 #endif
 351                 sbi->ll_flags |= LL_SBI_ACL;
 352         } else {
 353                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 354 #ifdef MS_POSIXACL
 355                 sb->s_flags &= ~MS_POSIXACL;
 356 #endif
 357                 sbi->ll_flags &= ~LL_SBI_ACL;
 358         }
 359
 360         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 361                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 362
 363         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 364                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 365
 366         if (obd_connect_has_secctx(data))
 367                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 368
 369         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 370                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 371                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 372                                       "unknown maximum xattr size.\n", dt);
 373                 } else {
 374                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 375                         sbi->ll_xattr_cache_enabled = 1;
 376                 }
 377         }
 378
 379         obd = class_name2obd(dt);
 380         if (!obd) {
 381                 CERROR("DT %s: not setup or attached\n", dt);
 382                 GOTO(out_md_fid, err = -ENODEV);
 383         }
 384
 385         /* pass client page size via ocd_grant_blkbits, the server should report
 386          * back its backend blocksize for grant calculation purpose */
 387         data->ocd_grant_blkbits = PAGE_SHIFT;
 388
 389         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 390                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 391                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 392                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 393                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 394                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 395                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 396                                   OBD_CONNECT_EINPROGRESS |
 397                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 398                                   OBD_CONNECT_LAYOUTLOCK |
 399                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 400                                   OBD_CONNECT_BULK_MBITS;
 401
 402         data->ocd_connect_flags2 = 0;
 403
 404         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 405                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 406
 407         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 408          * disabled by default, because it can still be enabled on the
 409          * fly via /proc. As a consequence, we still need to come to an
 410          * agreement on the supported algorithms at connect time */
 411         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 412
 413         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 414                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 415         else
 416                 data->ocd_cksum_types = cksum_types_supported_client();
 417
 418 #ifdef HAVE_LRU_RESIZE_SUPPORT
 419         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 420 #endif
 421         /* always ping even if server suppress_pings */
 422         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 423                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 424
 425         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 426                "ocd_grant: %d\n", data->ocd_connect_flags,
 427                data->ocd_version, data->ocd_grant);
 428
 429         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 430         obd->obd_upcall.onu_upcall = cl_ocd_update;
 431
 432         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 433
 434         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 435                           NULL);
 436         if (err == -EBUSY) {
 437                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 438                                    "recovery, of which this client is not a "
 439                                    "part.  Please wait for recovery to "
 440                                    "complete, abort, or time out.\n", dt);
 441                 GOTO(out_md, err);
 442         } else if (err) {
 443                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 444                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 445                 GOTO(out_md, err);
 446         }
 447
 448         sbi->ll_dt_exp->exp_connect_data = *data;
 449
 450         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 451                            LUSTRE_SEQ_METADATA);
 452         if (err) {
 453                 CERROR("%s: Can't init data layer FID infrastructure, "
 454                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 455                 GOTO(out_dt, err);
 456         }
 457
 458         mutex_lock(&sbi->ll_lco.lco_lock);
 459         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 460         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 461         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 462         mutex_unlock(&sbi->ll_lco.lco_lock);
 463
 464         fid_zero(&sbi->ll_root_fid);
 465         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 466                            &sbi->ll_root_fid);
 467         if (err) {
 468                 CERROR("cannot mds_connect: rc = %d\n", err);
 469                 GOTO(out_lock_cn_cb, err);
 470         }
 471         if (!fid_is_sane(&sbi->ll_root_fid)) {
 472                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 473                        sbi->ll_md_exp->exp_obd->obd_name,
 474                        PFID(&sbi->ll_root_fid));
 475                 GOTO(out_lock_cn_cb, err = -EINVAL);
 476         }
 477         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 478
 479         sb->s_op = &lustre_super_operations;
 480 #if THREAD_SIZE >= 8192 /*b=17630*/
 481         sb->s_export_op = &lustre_export_operations;
 482 #endif
 483
 484         /* make root inode
 485          * XXX: move this to after cbd setup? */
 486         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 487         if (sbi->ll_flags & LL_SBI_ACL)
 488                 valid |= OBD_MD_FLACL;
 489
 490         OBD_ALLOC_PTR(op_data);
 491         if (op_data == NULL)
 492                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 493
 494         op_data->op_fid1 = sbi->ll_root_fid;
 495         op_data->op_mode = 0;
 496         op_data->op_valid = valid;
 497
 498         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 499
 500         OBD_FREE_PTR(op_data);
 501         if (err) {
 502                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 503                        sbi->ll_md_exp->exp_obd->obd_name, err);
 504                 GOTO(out_lock_cn_cb, err);
 505         }
 506
 507         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 508                                sbi->ll_md_exp, &lmd);
 509         if (err) {
 510                 CERROR("failed to understand root inode md: rc = %d\n", err);
 511                 ptlrpc_req_finished(request);
 512                 GOTO(out_lock_cn_cb, err);
 513         }
 514
 515         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 516         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 517                                             sbi->ll_flags & LL_SBI_32BIT_API),
 518                        &lmd);
 519         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 520         ptlrpc_req_finished(request);
 521
 522         if (IS_ERR(root)) {
 523 #ifdef CONFIG_FS_POSIX_ACL
 524                 if (lmd.posix_acl) {
 525                         posix_acl_release(lmd.posix_acl);
 526                         lmd.posix_acl = NULL;
 527                 }
 528 #endif
 529                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 530                 root = NULL;
 531                 CERROR("lustre_lite: bad iget4 for root\n");
 532                 GOTO(out_root, err);
 533         }
 534
 535         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 536         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 537                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 538                                  NULL);
 539         if (err) {
 540                 CERROR("%s: Set checksum failed: rc = %d\n",
 541                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 542                 GOTO(out_root, err);
 543         }
 544         cl_sb_init(sb);
 545
 546         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 547                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 548                                  sbi->ll_cache, NULL);
 549         if (err) {
 550                 CERROR("%s: Set cache_set failed: rc = %d\n",
 551                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 552                 GOTO(out_root, err);
 553         }
 554
 555         sb->s_root = d_make_root(root);
 556         if (sb->s_root == NULL) {
 557                 CERROR("%s: can't make root dentry\n",
 558                         ll_get_fsname(sb, NULL, 0));
 559                 GOTO(out_root, err = -ENOMEM);
 560         }
 561 #ifdef HAVE_DCACHE_LOCK
 562         sb->s_root->d_op = &ll_d_ops;
 563 #endif
 564
 565         sbi->ll_sdev_orig = sb->s_dev;
 566
 567         /* We set sb->s_dev equal on all lustre clients in order to support
 568          * NFS export clustering.  NFSD requires that the FSID be the same
 569          * on all clients. */
 570         /* s_dev is also used in lt_compare() to compare two fs, but that is
 571          * only a node-local comparison. */
 572         uuid = obd_get_uuid(sbi->ll_md_exp);
 573         if (uuid != NULL)
 574                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 575
 576         if (data != NULL)
 577                 OBD_FREE_PTR(data);
 578         if (osfs != NULL)
 579                 OBD_FREE_PTR(osfs);
 580         if (proc_lustre_fs_root != NULL) {
 581                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 582                                                   dt, md);
 583                 if (err < 0) {
 584                         CERROR("%s: could not register mount in lprocfs: "
 585                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 586                         err = 0;
 587                 }
 588         }
 589
 590         RETURN(err);
 591 out_root:
 592         if (root)
 593                 iput(root);
 594 out_lock_cn_cb:
 595         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 596 out_dt:
 597         obd_disconnect(sbi->ll_dt_exp);
 598         sbi->ll_dt_exp = NULL;
 599 out_md_fid:
 600         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 601 out_md:
 602         obd_disconnect(sbi->ll_md_exp);
 603         sbi->ll_md_exp = NULL;
 604 out:
 605         if (data != NULL)
 606                 OBD_FREE_PTR(data);
 607         if (osfs != NULL)
 608                 OBD_FREE_PTR(osfs);
 609         return err;
 610 }
 611
 612 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 613 {
 614         int size, rc;
 615
 616         size = sizeof(*lmmsize);
 617         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 618                           KEY_MAX_EASIZE, &size, lmmsize);
 619         if (rc != 0) {
 620                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 621                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 622                 RETURN(rc);
 623         }
 624
 625         size = sizeof(int);
 626         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 627                           KEY_MAX_EASIZE, &size, lmmsize);
 628         if (rc)
 629                 CERROR("Get max mdsize error rc %d\n", rc);
 630
 631         RETURN(rc);
 632 }
 633
 634 /**
 635  * Get the value of the default_easize parameter.
 636  *
 637  * \see client_obd::cl_default_mds_easize
 638  *
 639  * \param[in] sbi       superblock info for this filesystem
 640  * \param[out] lmmsize  pointer to storage location for value
 641  *
 642  * \retval 0            on success
 643  * \retval negative     negated errno on failure
 644  */
 645 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 646 {
 647         int size, rc;
 648
 649         size = sizeof(int);
 650         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 651                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 652         if (rc)
 653                 CERROR("Get default mdsize error rc %d\n", rc);
 654
 655         RETURN(rc);
 656 }
 657
 658 /**
 659  * Set the default_easize parameter to the given value.
 660  *
 661  * \see client_obd::cl_default_mds_easize
 662  *
 663  * \param[in] sbi       superblock info for this filesystem
 664  * \param[in] lmmsize   the size to set
 665  *
 666  * \retval 0            on success
 667  * \retval negative     negated errno on failure
 668  */
 669 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 670 {
 671         int rc;
 672
 673         if (lmmsize < sizeof(struct lov_mds_md) ||
 674             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 675                 return -EINVAL;
 676
 677         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 678                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 679                                 sizeof(int), &lmmsize, NULL);
 680
 681         RETURN(rc);
 682 }
 683
 684 static void client_common_put_super(struct super_block *sb)
 685 {
 686         struct ll_sb_info *sbi = ll_s2sbi(sb);
 687         ENTRY;
 688
 689         cl_sb_fini(sb);
 690
 691         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 692         obd_disconnect(sbi->ll_dt_exp);
 693         sbi->ll_dt_exp = NULL;
 694
 695         lprocfs_unregister_mountpoint(sbi);
 696
 697         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 698         obd_disconnect(sbi->ll_md_exp);
 699         sbi->ll_md_exp = NULL;
 700
 701         EXIT;
 702 }
 703
 704 void ll_kill_super(struct super_block *sb)
 705 {
 706         struct ll_sb_info *sbi;
 707         ENTRY;
 708
 709         /* not init sb ?*/
 710         if (!(sb->s_flags & MS_ACTIVE))
 711                 return;
 712
 713         sbi = ll_s2sbi(sb);
 714         /* we need restore s_dev from changed for clustred NFS before put_super
 715          * because new kernels have cached s_dev and change sb->s_dev in
 716          * put_super not affected real removing devices */
 717         if (sbi) {
 718                 sb->s_dev = sbi->ll_sdev_orig;
 719                 sbi->ll_umounting = 1;
 720
 721                 /* wait running statahead threads to quit */
 722                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 723                         set_current_state(TASK_UNINTERRUPTIBLE);
 724                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 725                 }
 726         }
 727
 728         EXIT;
 729 }
 730
 731 static inline int ll_set_opt(const char *opt, char *data, int fl)
 732 {
 733         if (strncmp(opt, data, strlen(opt)) != 0)
 734                 return(0);
 735         else
 736                 return(fl);
 737 }
 738
 739 /* non-client-specific mount options are parsed in lmd_parse */
 740 static int ll_options(char *options, int *flags)
 741 {
 742         int tmp;
 743         char *s1 = options, *s2;
 744         ENTRY;
 745
 746         if (!options)
 747                 RETURN(0);
 748
 749         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 750
 751         while (*s1) {
 752                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 753                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 754                 if (tmp) {
 755                         *flags |= tmp;
 756                         goto next;
 757                 }
 758                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 759                 if (tmp) {
 760                         *flags |= tmp;
 761                         goto next;
 762                 }
 763                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 764                 if (tmp) {
 765                         *flags |= tmp;
 766                         goto next;
 767                 }
 768                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 769                 if (tmp) {
 770                         *flags &= ~tmp;
 771                         goto next;
 772                 }
 773                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 774                 if (tmp) {
 775                         *flags |= tmp;
 776                         goto next;
 777                 }
 778                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 779                 if (tmp) {
 780                         *flags &= ~tmp;
 781                         goto next;
 782                 }
 783                 tmp = ll_set_opt("context", s1, 1);
 784                 if (tmp)
 785                         goto next;
 786                 tmp = ll_set_opt("fscontext", s1, 1);
 787                 if (tmp)
 788                         goto next;
 789                 tmp = ll_set_opt("defcontext", s1, 1);
 790                 if (tmp)
 791                         goto next;
 792                 tmp = ll_set_opt("rootcontext", s1, 1);
 793                 if (tmp)
 794                         goto next;
 795                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 796                 if (tmp) {
 797                         *flags |= tmp;
 798                         goto next;
 799                 }
 800                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 801                 if (tmp) {
 802                         *flags &= ~tmp;
 803                         goto next;
 804                 }
 805
 806                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 807                 if (tmp) {
 808                         *flags |= tmp;
 809                         goto next;
 810                 }
 811                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 812                 if (tmp) {
 813                         *flags &= ~tmp;
 814                         goto next;
 815                 }
 816                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 817                 if (tmp) {
 818                         *flags |= tmp;
 819                         goto next;
 820                 }
 821                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 822                 if (tmp) {
 823                         *flags &= ~tmp;
 824                         goto next;
 825                 }
 826                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 827                 if (tmp) {
 828                         *flags |= tmp;
 829                         goto next;
 830                 }
 831                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 832                 if (tmp) {
 833                         *flags &= ~tmp;
 834                         goto next;
 835                 }
 836                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 837                 if (tmp) {
 838                         *flags |= tmp;
 839                         goto next;
 840                 }
 841                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 842                 if (tmp) {
 843                         *flags |= tmp;
 844                         goto next;
 845                 }
 846                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 847                 if (tmp) {
 848                         *flags &= ~tmp;
 849                         goto next;
 850                 }
 851                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 852                 if (tmp) {
 853                         *flags |= tmp;
 854                         goto next;
 855                 }
 856                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 857                                    s1);
 858                 RETURN(-EINVAL);
 859
 860 next:
 861                 /* Find next opt */
 862                 s2 = strchr(s1, ',');
 863                 if (s2 == NULL)
 864                         break;
 865                 s1 = s2 + 1;
 866         }
 867         RETURN(0);
 868 }
 869
 870 void ll_lli_init(struct ll_inode_info *lli)
 871 {
 872         lli->lli_inode_magic = LLI_INODE_MAGIC;
 873         lli->lli_flags = 0;
 874         spin_lock_init(&lli->lli_lock);
 875         lli->lli_posix_acl = NULL;
 876         /* Do not set lli_fid, it has been initialized already. */
 877         fid_zero(&lli->lli_pfid);
 878         lli->lli_mds_read_och = NULL;
 879         lli->lli_mds_write_och = NULL;
 880         lli->lli_mds_exec_och = NULL;
 881         lli->lli_open_fd_read_count = 0;
 882         lli->lli_open_fd_write_count = 0;
 883         lli->lli_open_fd_exec_count = 0;
 884         mutex_init(&lli->lli_och_mutex);
 885         spin_lock_init(&lli->lli_agl_lock);
 886         spin_lock_init(&lli->lli_layout_lock);
 887         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 888         lli->lli_clob = NULL;
 889
 890         init_rwsem(&lli->lli_xattrs_list_rwsem);
 891         mutex_init(&lli->lli_xattrs_enq_lock);
 892
 893         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 894         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 895                 mutex_init(&lli->lli_readdir_mutex);
 896                 lli->lli_opendir_key = NULL;
 897                 lli->lli_sai = NULL;
 898                 spin_lock_init(&lli->lli_sa_lock);
 899                 lli->lli_opendir_pid = 0;
 900                 lli->lli_sa_enabled = 0;
 901                 lli->lli_def_stripe_offset = -1;
 902         } else {
 903                 mutex_init(&lli->lli_size_mutex);
 904                 lli->lli_symlink_name = NULL;
 905                 init_rwsem(&lli->lli_trunc_sem);
 906                 range_lock_tree_init(&lli->lli_write_tree);
 907                 init_rwsem(&lli->lli_glimpse_sem);
 908                 lli->lli_glimpse_time = 0;
 909                 INIT_LIST_HEAD(&lli->lli_agl_list);
 910                 lli->lli_agl_index = 0;
 911                 lli->lli_async_rc = 0;
 912         }
 913         mutex_init(&lli->lli_layout_mutex);
 914         memset(lli->lli_jobid, 0, LUSTRE_JOBID_SIZE);
 915 }
 916
 917 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 918 {
 919         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 920
 921         bdi->name = "lustre";
 922         return bdi_register(bdi, NULL, "lustre-%d",
 923                             atomic_inc_return(&ll_bdi_num));
 924 }
 925
 926 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 927 {
 928         struct lustre_profile *lprof = NULL;
 929         struct lustre_sb_info *lsi = s2lsi(sb);
 930         struct ll_sb_info *sbi;
 931         char  *dt = NULL, *md = NULL;
 932         char  *profilenm = get_profile_name(sb);
 933         struct config_llog_instance *cfg;
 934         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 935         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 936         int    err;
 937         ENTRY;
 938
 939         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 940
 941         OBD_ALLOC_PTR(cfg);
 942         if (cfg == NULL)
 943                 RETURN(-ENOMEM);
 944
 945         try_module_get(THIS_MODULE);
 946
 947         /* client additional sb info */
 948         lsi->lsi_llsbi = sbi = ll_init_sbi();
 949         if (!sbi) {
 950                 module_put(THIS_MODULE);
 951                 OBD_FREE_PTR(cfg);
 952                 RETURN(-ENOMEM);
 953         }
 954
 955         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 956         if (err)
 957                 GOTO(out_free, err);
 958
 959         err = bdi_init(&lsi->lsi_bdi);
 960         if (err)
 961                 GOTO(out_free, err);
 962         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 963 #ifdef HAVE_BDI_CAP_MAP_COPY
 964         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 965 #else
 966         lsi->lsi_bdi.capabilities = 0;
 967 #endif
 968         err = ll_bdi_register(&lsi->lsi_bdi);
 969         if (err)
 970                 GOTO(out_free, err);
 971
 972         sb->s_bdi = &lsi->lsi_bdi;
 973 #ifndef HAVE_DCACHE_LOCK
 974         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 975         sb->s_d_op = &ll_d_ops;
 976 #endif
 977
 978         /* Generate a string unique to this super, in case some joker tries
 979            to mount the same fs at two mount points.
 980            Use the address of the super itself.*/
 981         cfg->cfg_instance = sb;
 982         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 983         cfg->cfg_callback = class_config_llog_handler;
 984         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
 985         /* set up client obds */
 986         err = lustre_process_log(sb, profilenm, cfg);
 987         if (err < 0)
 988                 GOTO(out_free, err);
 989
 990         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 991         lprof = class_get_profile(profilenm);
 992         if (lprof == NULL) {
 993                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
 994                                    " read from the MGS.  Does that filesystem "
 995                                    "exist?\n", profilenm);
 996                 GOTO(out_free, err = -EINVAL);
 997         }
 998         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 999                lprof->lp_md, lprof->lp_dt);
1000
1001         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1002         if (!dt)
1003                 GOTO(out_free, err = -ENOMEM);
1004         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1005
1006         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1007         if (!md)
1008                 GOTO(out_free, err = -ENOMEM);
1009         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1010
1011         /* connections, registrations, sb setup */
1012         err = client_common_fill_super(sb, md, dt, mnt);
1013         if (err < 0)
1014                 GOTO(out_free, err);
1015
1016         sbi->ll_client_common_fill_super_succeeded = 1;
1017
1018 out_free:
1019         if (md)
1020                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1021         if (dt)
1022                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1023         if (lprof != NULL)
1024                 class_put_profile(lprof);
1025         if (err)
1026                 ll_put_super(sb);
1027         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1028                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1029
1030         OBD_FREE_PTR(cfg);
1031         RETURN(err);
1032 } /* ll_fill_super */
1033
1034 void ll_put_super(struct super_block *sb)
1035 {
1036         struct config_llog_instance cfg, params_cfg;
1037         struct obd_device *obd;
1038         struct lustre_sb_info *lsi = s2lsi(sb);
1039         struct ll_sb_info *sbi = ll_s2sbi(sb);
1040         char *profilenm = get_profile_name(sb);
1041         long ccc_count;
1042         int next, force = 1, rc = 0;
1043         ENTRY;
1044
1045         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1046
1047         cfg.cfg_instance = sb;
1048         lustre_end_log(sb, profilenm, &cfg);
1049
1050         params_cfg.cfg_instance = sb;
1051         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1052
1053         if (sbi->ll_md_exp) {
1054                 obd = class_exp2obd(sbi->ll_md_exp);
1055                 if (obd)
1056                         force = obd->obd_force;
1057         }
1058
1059         /* Wait for unstable pages to be committed to stable storage */
1060         if (force == 0) {
1061                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1062                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1063                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1064                         &lwi);
1065         }
1066
1067         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1068         if (force == 0 && rc != -EINTR)
1069                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1070
1071
1072         /* We need to set force before the lov_disconnect in
1073            lustre_common_put_super, since l_d cleans up osc's as well. */
1074         if (force) {
1075                 next = 0;
1076                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1077                                                      &next)) != NULL) {
1078                         obd->obd_force = force;
1079                 }
1080         }
1081
1082         if (sbi->ll_client_common_fill_super_succeeded) {
1083                 /* Only if client_common_fill_super succeeded */
1084                 client_common_put_super(sb);
1085         }
1086
1087         next = 0;
1088         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1089                 class_manual_cleanup(obd);
1090         }
1091
1092         if (sbi->ll_flags & LL_SBI_VERBOSE)
1093                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1094
1095         if (profilenm)
1096                 class_del_profile(profilenm);
1097
1098         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1099                 bdi_destroy(&lsi->lsi_bdi);
1100                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1101         }
1102
1103         ll_free_sbi(sb);
1104         lsi->lsi_llsbi = NULL;
1105
1106         lustre_common_put_super(sb);
1107
1108         cl_env_cache_purge(~0);
1109
1110         module_put(THIS_MODULE);
1111
1112         EXIT;
1113 } /* client_put_super */
1114
1115 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1116 {
1117         struct inode *inode = NULL;
1118
1119         /* NOTE: we depend on atomic igrab() -bzzz */
1120         lock_res_and_lock(lock);
1121         if (lock->l_resource->lr_lvb_inode) {
1122                 struct ll_inode_info * lli;
1123                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1124                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1125                         inode = igrab(lock->l_resource->lr_lvb_inode);
1126                 } else {
1127                         inode = lock->l_resource->lr_lvb_inode;
1128                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1129                                          D_WARNING, lock, "lr_lvb_inode %p is "
1130                                          "bogus: magic %08x",
1131                                          lock->l_resource->lr_lvb_inode,
1132                                          lli->lli_inode_magic);
1133                         inode = NULL;
1134                 }
1135         }
1136         unlock_res_and_lock(lock);
1137         return inode;
1138 }
1139
1140 void ll_dir_clear_lsm_md(struct inode *inode)
1141 {
1142         struct ll_inode_info *lli = ll_i2info(inode);
1143
1144         LASSERT(S_ISDIR(inode->i_mode));
1145
1146         if (lli->lli_lsm_md != NULL) {
1147                 lmv_free_memmd(lli->lli_lsm_md);
1148                 lli->lli_lsm_md = NULL;
1149         }
1150 }
1151
1152 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1153                                       const struct lu_fid *fid,
1154                                       struct lustre_md *md)
1155 {
1156         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1157         struct mdt_body         *body = md->body;
1158         struct inode            *inode;
1159         ino_t                   ino;
1160         ENTRY;
1161
1162         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1163         inode = iget_locked(sb, ino);
1164         if (inode == NULL) {
1165                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1166                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1167                 RETURN(ERR_PTR(-ENOENT));
1168         }
1169
1170         if (inode->i_state & I_NEW) {
1171                 struct ll_inode_info *lli = ll_i2info(inode);
1172                 struct lmv_stripe_md *lsm = md->lmv;
1173
1174                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1175                                 (body->mbo_mode & S_IFMT);
1176                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1177                          PFID(fid));
1178
1179                 LTIME_S(inode->i_mtime) = 0;
1180                 LTIME_S(inode->i_atime) = 0;
1181                 LTIME_S(inode->i_ctime) = 0;
1182                 inode->i_rdev = 0;
1183
1184 #ifdef HAVE_BACKING_DEV_INFO
1185                 /* initializing backing dev info. */
1186                 inode->i_mapping->backing_dev_info =
1187                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1188 #endif
1189                 inode->i_op = &ll_dir_inode_operations;
1190                 inode->i_fop = &ll_dir_operations;
1191                 lli->lli_fid = *fid;
1192                 ll_lli_init(lli);
1193
1194                 LASSERT(lsm != NULL);
1195                 /* master object FID */
1196                 lli->lli_pfid = body->mbo_fid1;
1197                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1198                        lli, PFID(fid), PFID(&lli->lli_pfid));
1199                 unlock_new_inode(inode);
1200         }
1201
1202         RETURN(inode);
1203 }
1204
1205 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1206 {
1207         struct lu_fid *fid;
1208         struct lmv_stripe_md *lsm = md->lmv;
1209         int i;
1210
1211         LASSERT(lsm != NULL);
1212         /* XXX sigh, this lsm_root initialization should be in
1213          * LMV layer, but it needs ll_iget right now, so we
1214          * put this here right now. */
1215         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1216                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1217                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1218                 /* Unfortunately ll_iget will call ll_update_inode,
1219                  * where the initialization of slave inode is slightly
1220                  * different, so it reset lsm_md to NULL to avoid
1221                  * initializing lsm for slave inode. */
1222                 /* For migrating inode, master stripe and master object will
1223                  * be same, so we only need assign this inode */
1224                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1225                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1226                 else
1227                         lsm->lsm_md_oinfo[i].lmo_root =
1228                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1229
1230                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1231                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1232
1233                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1234                         return rc;
1235                 }
1236         }
1237
1238         return 0;
1239 }
1240
1241 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1242                                 const struct lmv_stripe_md *lsm_md2)
1243 {
1244         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1245                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1246                lsm_md1->lsm_md_master_mdt_index ==
1247                                         lsm_md2->lsm_md_master_mdt_index &&
1248                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1249                lsm_md1->lsm_md_layout_version ==
1250                                         lsm_md2->lsm_md_layout_version &&
1251                strcmp(lsm_md1->lsm_md_pool_name,
1252                       lsm_md2->lsm_md_pool_name) == 0;
1253 }
1254
1255 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1256 {
1257         struct ll_inode_info *lli = ll_i2info(inode);
1258         struct lmv_stripe_md *lsm = md->lmv;
1259         int     rc;
1260         ENTRY;
1261
1262         LASSERT(S_ISDIR(inode->i_mode));
1263         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1264                PFID(ll_inode2fid(inode)));
1265
1266         /* no striped information from request. */
1267         if (lsm == NULL) {
1268                 if (lli->lli_lsm_md == NULL) {
1269                         RETURN(0);
1270                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1271                                                 LMV_HASH_FLAG_MIGRATION) {
1272                         /* migration is done, the temporay MIGRATE layout has
1273                          * been removed */
1274                         CDEBUG(D_INODE, DFID" finish migration.\n",
1275                                PFID(ll_inode2fid(inode)));
1276                         lmv_free_memmd(lli->lli_lsm_md);
1277                         lli->lli_lsm_md = NULL;
1278                         RETURN(0);
1279                 } else {
1280                         /* The lustre_md from req does not include stripeEA,
1281                          * see ll_md_setattr */
1282                         RETURN(0);
1283                 }
1284         }
1285
1286         /* set the directory layout */
1287         if (lli->lli_lsm_md == NULL) {
1288                 struct cl_attr  *attr;
1289
1290                 rc = ll_init_lsm_md(inode, md);
1291                 if (rc != 0)
1292                         RETURN(rc);
1293
1294                 /* set md->lmv to NULL, so the following free lustre_md
1295                  * will not free this lsm */
1296                 md->lmv = NULL;
1297                 lli->lli_lsm_md = lsm;
1298
1299                 OBD_ALLOC_PTR(attr);
1300                 if (attr == NULL)
1301                         RETURN(-ENOMEM);
1302
1303                 /* validate the lsm */
1304                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1305                                    ll_md_blocking_ast);
1306                 if (rc != 0) {
1307                         OBD_FREE_PTR(attr);
1308                         RETURN(rc);
1309                 }
1310
1311                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1312                         md->body->mbo_nlink = attr->cat_nlink;
1313                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1314                         md->body->mbo_size = attr->cat_size;
1315                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1316                         md->body->mbo_atime = attr->cat_atime;
1317                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1318                         md->body->mbo_ctime = attr->cat_ctime;
1319                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1320                         md->body->mbo_mtime = attr->cat_mtime;
1321
1322                 OBD_FREE_PTR(attr);
1323
1324                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1325                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1326                 RETURN(0);
1327         }
1328
1329         /* Compare the old and new stripe information */
1330         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1331                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1332                 int                     idx;
1333
1334                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1335                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1336                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1337                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1338                        inode, lsm, old_lsm,
1339                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1340                        lsm->lsm_md_stripe_count,
1341                        old_lsm->lsm_md_stripe_count,
1342                        lsm->lsm_md_master_mdt_index,
1343                        old_lsm->lsm_md_master_mdt_index,
1344                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1345                        lsm->lsm_md_layout_version,
1346                        old_lsm->lsm_md_layout_version,
1347                        lsm->lsm_md_pool_name,
1348                        old_lsm->lsm_md_pool_name);
1349
1350                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1351                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1352                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1353                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1354                 }
1355
1356                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1357                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1358                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1359                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1360                 }
1361
1362                 RETURN(-EIO);
1363         }
1364
1365         RETURN(0);
1366 }
1367
1368 void ll_clear_inode(struct inode *inode)
1369 {
1370         struct ll_inode_info *lli = ll_i2info(inode);
1371         struct ll_sb_info *sbi = ll_i2sbi(inode);
1372         ENTRY;
1373
1374         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1375                PFID(ll_inode2fid(inode)), inode);
1376
1377         if (S_ISDIR(inode->i_mode)) {
1378                 /* these should have been cleared in ll_file_release */
1379                 LASSERT(lli->lli_opendir_key == NULL);
1380                 LASSERT(lli->lli_sai == NULL);
1381                 LASSERT(lli->lli_opendir_pid == 0);
1382         }
1383
1384         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1385
1386         LASSERT(!lli->lli_open_fd_write_count);
1387         LASSERT(!lli->lli_open_fd_read_count);
1388         LASSERT(!lli->lli_open_fd_exec_count);
1389
1390         if (lli->lli_mds_write_och)
1391                 ll_md_real_close(inode, FMODE_WRITE);
1392         if (lli->lli_mds_exec_och)
1393                 ll_md_real_close(inode, FMODE_EXEC);
1394         if (lli->lli_mds_read_och)
1395                 ll_md_real_close(inode, FMODE_READ);
1396
1397         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1398                 OBD_FREE(lli->lli_symlink_name,
1399                          strlen(lli->lli_symlink_name) + 1);
1400                 lli->lli_symlink_name = NULL;
1401         }
1402
1403         ll_xattr_cache_destroy(inode);
1404
1405 #ifdef CONFIG_FS_POSIX_ACL
1406         if (lli->lli_posix_acl) {
1407                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1408                 posix_acl_release(lli->lli_posix_acl);
1409                 lli->lli_posix_acl = NULL;
1410         }
1411 #endif
1412         lli->lli_inode_magic = LLI_INODE_DEAD;
1413
1414         if (S_ISDIR(inode->i_mode))
1415                 ll_dir_clear_lsm_md(inode);
1416         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1417                 LASSERT(list_empty(&lli->lli_agl_list));
1418
1419         /*
1420          * XXX This has to be done before lsm is freed below, because
1421          * cl_object still uses inode lsm.
1422          */
1423         cl_inode_fini(inode);
1424
1425         EXIT;
1426 }
1427
1428 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1429 {
1430         struct lustre_md md;
1431         struct inode *inode = dentry->d_inode;
1432         struct ll_sb_info *sbi = ll_i2sbi(inode);
1433         struct ptlrpc_request *request = NULL;
1434         int rc, ia_valid;
1435         ENTRY;
1436
1437         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1438                                      LUSTRE_OPC_ANY, NULL);
1439         if (IS_ERR(op_data))
1440                 RETURN(PTR_ERR(op_data));
1441
1442         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1443         if (rc) {
1444                 ptlrpc_req_finished(request);
1445                 if (rc == -ENOENT) {
1446                         clear_nlink(inode);
1447                         /* Unlinked special device node? Or just a race?
1448                          * Pretend we done everything. */
1449                         if (!S_ISREG(inode->i_mode) &&
1450                             !S_ISDIR(inode->i_mode)) {
1451                                 ia_valid = op_data->op_attr.ia_valid;
1452                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1453                                 rc = simple_setattr(dentry, &op_data->op_attr);
1454                                 op_data->op_attr.ia_valid = ia_valid;
1455                         }
1456                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1457                         CERROR("md_setattr fails: rc = %d\n", rc);
1458                 }
1459                 RETURN(rc);
1460         }
1461
1462         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1463                               sbi->ll_md_exp, &md);
1464         if (rc) {
1465                 ptlrpc_req_finished(request);
1466                 RETURN(rc);
1467         }
1468
1469         ia_valid = op_data->op_attr.ia_valid;
1470         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1471          * cache is not cleared yet. */
1472         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1473         if (S_ISREG(inode->i_mode))
1474                 inode_lock(inode);
1475         rc = simple_setattr(dentry, &op_data->op_attr);
1476         if (S_ISREG(inode->i_mode))
1477                 inode_unlock(inode);
1478         op_data->op_attr.ia_valid = ia_valid;
1479
1480         rc = ll_update_inode(inode, &md);
1481         ptlrpc_req_finished(request);
1482
1483         RETURN(rc);
1484 }
1485
1486 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1487  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1488  * keep these values until such a time that objects are allocated for it.
1489  * We do the MDS operations first, as it is checking permissions for us.
1490  * We don't to the MDS RPC if there is nothing that we want to store there,
1491  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1492  * going to do an RPC anyways.
1493  *
1494  * If we are doing a truncate, we will send the mtime and ctime updates
1495  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1496  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1497  * at the same time.
1498  *
1499  * In case of HSMimport, we only set attr on MDS.
1500  */
1501 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1502 {
1503         struct inode *inode = dentry->d_inode;
1504         struct ll_inode_info *lli = ll_i2info(inode);
1505         struct md_op_data *op_data = NULL;
1506         int rc = 0;
1507         ENTRY;
1508
1509         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1510                "valid %x, hsm_import %d\n",
1511                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1512                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1513                hsm_import);
1514
1515         if (attr->ia_valid & ATTR_SIZE) {
1516                 /* Check new size against VFS/VM file size limit and rlimit */
1517                 rc = inode_newsize_ok(inode, attr->ia_size);
1518                 if (rc)
1519                         RETURN(rc);
1520
1521                 /* The maximum Lustre file size is variable, based on the
1522                  * OST maximum object size and number of stripes.  This
1523                  * needs another check in addition to the VFS check above. */
1524                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1525                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1526                                PFID(&lli->lli_fid), attr->ia_size,
1527                                ll_file_maxbytes(inode));
1528                         RETURN(-EFBIG);
1529                 }
1530
1531                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1532         }
1533
1534         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1535         if (attr->ia_valid & TIMES_SET_FLAGS) {
1536                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1537                     !cfs_capable(CFS_CAP_FOWNER))
1538                         RETURN(-EPERM);
1539         }
1540
1541         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1542         if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1543             (attr->ia_valid & ATTR_CTIME)) {
1544                 attr->ia_ctime = CURRENT_TIME;
1545                 attr->ia_valid |= ATTR_CTIME_SET;
1546         }
1547         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1548             (attr->ia_valid & ATTR_ATIME)) {
1549                 attr->ia_atime = CURRENT_TIME;
1550                 attr->ia_valid |= ATTR_ATIME_SET;
1551         }
1552         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1553             (attr->ia_valid & ATTR_MTIME)) {
1554                 attr->ia_mtime = CURRENT_TIME;
1555                 attr->ia_valid |= ATTR_MTIME_SET;
1556         }
1557
1558         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1559                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1560                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1561                        (s64)ktime_get_real_seconds());
1562
1563         if (S_ISREG(inode->i_mode)) {
1564                 if (attr->ia_valid & ATTR_SIZE)
1565                         inode_dio_write_done(inode);
1566                 inode_unlock(inode);
1567         }
1568
1569         /* We always do an MDS RPC, even if we're only changing the size;
1570          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1571
1572         OBD_ALLOC_PTR(op_data);
1573         if (op_data == NULL)
1574                 GOTO(out, rc = -ENOMEM);
1575
1576         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1577                 /* If we are changing file size, file content is
1578                  * modified, flag it. */
1579                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1580                 op_data->op_bias |= MDS_DATA_MODIFIED;
1581                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1582         }
1583
1584         op_data->op_attr = *attr;
1585
1586         rc = ll_md_setattr(dentry, op_data);
1587         if (rc)
1588                 GOTO(out, rc);
1589
1590         if (!S_ISREG(inode->i_mode) || hsm_import)
1591                 GOTO(out, rc = 0);
1592
1593         if (attr->ia_valid & (ATTR_SIZE |
1594                               ATTR_ATIME | ATTR_ATIME_SET |
1595                               ATTR_MTIME | ATTR_MTIME_SET |
1596                               ATTR_CTIME | ATTR_CTIME_SET)) {
1597                 /* For truncate and utimes sending attributes to OSTs, setting
1598                  * mtime/atime to the past will be performed under PW [0:EOF]
1599                  * extent lock (new_size:EOF for truncate).  It may seem
1600                  * excessive to send mtime/atime updates to OSTs when not
1601                  * setting times to past, but it is necessary due to possible
1602                  * time de-synchronization between MDT inode and OST objects */
1603                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1604         }
1605
1606         /* If the file was restored, it needs to set dirty flag.
1607          *
1608          * We've already sent MDS_DATA_MODIFIED flag in
1609          * ll_md_setattr() for truncate. However, the MDT refuses to
1610          * set the HS_DIRTY flag on released files, so we have to set
1611          * it again if the file has been restored. Please check how
1612          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1613          *
1614          * Please notice that if the file is not released, the previous
1615          * MDS_DATA_MODIFIED has taken effect and usually
1616          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1617          * This way we can save an RPC for common open + trunc
1618          * operation. */
1619         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1620                 struct hsm_state_set hss = {
1621                         .hss_valid = HSS_SETMASK,
1622                         .hss_setmask = HS_DIRTY,
1623                 };
1624                 int rc2;
1625
1626                 rc2 = ll_hsm_state_set(inode, &hss);
1627                 /* truncate and write can happen at the same time, so that
1628                  * the file can be set modified even though the file is not
1629                  * restored from released state, and ll_hsm_state_set() is
1630                  * not applicable for the file, and rc2 < 0 is normal in this
1631                  * case. */
1632                 if (rc2 < 0)
1633                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1634                                PFID(ll_inode2fid(inode)), rc2);
1635         }
1636
1637         EXIT;
1638 out:
1639         if (op_data != NULL)
1640                 ll_finish_md_op_data(op_data);
1641
1642         if (S_ISREG(inode->i_mode)) {
1643                 inode_lock(inode);
1644                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1645                         inode_dio_wait(inode);
1646                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1647                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1648                  * inode flags, so there is a gap where S_NOSEC is not set.
1649                  * This can cause a writer to take the i_mutex unnecessarily,
1650                  * but this is safe to do and should be rare. */
1651                 inode_has_no_xattr(inode);
1652         }
1653
1654         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1655                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1656
1657         return rc;
1658 }
1659
1660 int ll_setattr(struct dentry *de, struct iattr *attr)
1661 {
1662         int mode = de->d_inode->i_mode;
1663
1664         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1665                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1666                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1667
1668         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1669                                (ATTR_SIZE|ATTR_MODE)) &&
1670             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1671              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1672               !(attr->ia_mode & S_ISGID))))
1673                 attr->ia_valid |= ATTR_FORCE;
1674
1675         if ((attr->ia_valid & ATTR_MODE) &&
1676             (mode & S_ISUID) &&
1677             !(attr->ia_mode & S_ISUID) &&
1678             !(attr->ia_valid & ATTR_KILL_SUID))
1679                 attr->ia_valid |= ATTR_KILL_SUID;
1680
1681         if ((attr->ia_valid & ATTR_MODE) &&
1682             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1683             !(attr->ia_mode & S_ISGID) &&
1684             !(attr->ia_valid & ATTR_KILL_SGID))
1685                 attr->ia_valid |= ATTR_KILL_SGID;
1686
1687         /* avoid polluted from ATTR_TIMES_SET,
1688          * projid is not expected to be set here */
1689         attr->ia_valid &= ~MDS_ATTR_PROJID;
1690
1691         return ll_setattr_raw(de, attr, false);
1692 }
1693
1694 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1695                        __u64 max_age, __u32 flags)
1696 {
1697         struct ll_sb_info *sbi = ll_s2sbi(sb);
1698         struct obd_statfs obd_osfs;
1699         int rc;
1700         ENTRY;
1701
1702         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1703         if (rc) {
1704                 CERROR("md_statfs fails: rc = %d\n", rc);
1705                 RETURN(rc);
1706         }
1707
1708         osfs->os_type = sb->s_magic;
1709
1710         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1711                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1712
1713         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1714                 flags |= OBD_STATFS_NODELAY;
1715
1716         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1717         if (rc) {
1718                 CERROR("obd_statfs fails: rc = %d\n", rc);
1719                 RETURN(rc);
1720         }
1721
1722         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1723                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1724                obd_osfs.os_files);
1725
1726         osfs->os_bsize = obd_osfs.os_bsize;
1727         osfs->os_blocks = obd_osfs.os_blocks;
1728         osfs->os_bfree = obd_osfs.os_bfree;
1729         osfs->os_bavail = obd_osfs.os_bavail;
1730
1731         /* If we don't have as many objects free on the OST as inodes
1732          * on the MDS, we reduce the total number of inodes to
1733          * compensate, so that the "inodes in use" number is correct.
1734          */
1735         if (obd_osfs.os_ffree < osfs->os_ffree) {
1736                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1737                         obd_osfs.os_ffree;
1738                 osfs->os_ffree = obd_osfs.os_ffree;
1739         }
1740
1741         RETURN(rc);
1742 }
1743 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1744 {
1745         struct super_block *sb = de->d_sb;
1746         struct obd_statfs osfs;
1747         __u64 fsid = huge_encode_dev(sb->s_dev);
1748         int rc;
1749
1750         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1751         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1752
1753         /* Some amount of caching on the client is allowed */
1754         rc = ll_statfs_internal(sb, &osfs,
1755                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1756                                 0);
1757         if (rc)
1758                 return rc;
1759
1760         statfs_unpack(sfs, &osfs);
1761
1762         /* We need to downshift for all 32-bit kernels, because we can't
1763          * tell if the kernel is being called via sys_statfs64() or not.
1764          * Stop before overflowing f_bsize - in which case it is better
1765          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1766         if (sizeof(long) < 8) {
1767                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1768                         sfs->f_bsize <<= 1;
1769
1770                         osfs.os_blocks >>= 1;
1771                         osfs.os_bfree >>= 1;
1772                         osfs.os_bavail >>= 1;
1773                 }
1774         }
1775
1776         sfs->f_blocks = osfs.os_blocks;
1777         sfs->f_bfree = osfs.os_bfree;
1778         sfs->f_bavail = osfs.os_bavail;
1779         sfs->f_fsid.val[0] = (__u32)fsid;
1780         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1781         return 0;
1782 }
1783
1784 void ll_inode_size_lock(struct inode *inode)
1785 {
1786         struct ll_inode_info *lli;
1787
1788         LASSERT(!S_ISDIR(inode->i_mode));
1789
1790         lli = ll_i2info(inode);
1791         mutex_lock(&lli->lli_size_mutex);
1792 }
1793
1794 void ll_inode_size_unlock(struct inode *inode)
1795 {
1796         struct ll_inode_info *lli;
1797
1798         lli = ll_i2info(inode);
1799         mutex_unlock(&lli->lli_size_mutex);
1800 }
1801
1802 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1803 {
1804         struct ll_inode_info *lli = ll_i2info(inode);
1805         struct mdt_body *body = md->body;
1806         struct ll_sb_info *sbi = ll_i2sbi(inode);
1807
1808         if (body->mbo_valid & OBD_MD_FLEASIZE)
1809                 cl_file_inode_init(inode, md);
1810
1811         if (S_ISDIR(inode->i_mode)) {
1812                 int     rc;
1813
1814                 rc = ll_update_lsm_md(inode, md);
1815                 if (rc != 0)
1816                         return rc;
1817         }
1818
1819 #ifdef CONFIG_FS_POSIX_ACL
1820         if (body->mbo_valid & OBD_MD_FLACL) {
1821                 spin_lock(&lli->lli_lock);
1822                 if (lli->lli_posix_acl)
1823                         posix_acl_release(lli->lli_posix_acl);
1824                 lli->lli_posix_acl = md->posix_acl;
1825                 spin_unlock(&lli->lli_lock);
1826         }
1827 #endif
1828         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1829                                         sbi->ll_flags & LL_SBI_32BIT_API);
1830         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1831
1832         if (body->mbo_valid & OBD_MD_FLATIME) {
1833                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1834                         LTIME_S(inode->i_atime) = body->mbo_atime;
1835                 lli->lli_atime = body->mbo_atime;
1836         }
1837
1838         if (body->mbo_valid & OBD_MD_FLMTIME) {
1839                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1840                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1841                                "to %llu\n", inode->i_ino,
1842                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1843                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1844                 }
1845                 lli->lli_mtime = body->mbo_mtime;
1846         }
1847
1848         if (body->mbo_valid & OBD_MD_FLCTIME) {
1849                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1850                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1851                 lli->lli_ctime = body->mbo_ctime;
1852         }
1853
1854         /* Clear i_flags to remove S_NOSEC before permissions are updated */
1855         if (body->mbo_valid & OBD_MD_FLFLAGS)
1856                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1857         if (body->mbo_valid & OBD_MD_FLMODE)
1858                 inode->i_mode = (inode->i_mode & S_IFMT) |
1859                                 (body->mbo_mode & ~S_IFMT);
1860
1861         if (body->mbo_valid & OBD_MD_FLTYPE)
1862                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1863                                 (body->mbo_mode & S_IFMT);
1864
1865         LASSERT(inode->i_mode != 0);
1866         if (S_ISREG(inode->i_mode))
1867                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1868                                        LL_MAX_BLKSIZE_BITS);
1869         else
1870                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1871
1872         if (body->mbo_valid & OBD_MD_FLUID)
1873                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1874         if (body->mbo_valid & OBD_MD_FLGID)
1875                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1876         if (body->mbo_valid & OBD_MD_FLPROJID)
1877                 lli->lli_projid = body->mbo_projid;
1878         if (body->mbo_valid & OBD_MD_FLNLINK)
1879                 set_nlink(inode, body->mbo_nlink);
1880         if (body->mbo_valid & OBD_MD_FLRDEV)
1881                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1882
1883         if (body->mbo_valid & OBD_MD_FLID) {
1884                 /* FID shouldn't be changed! */
1885                 if (fid_is_sane(&lli->lli_fid)) {
1886                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1887                                  "Trying to change FID "DFID
1888                                  " to the "DFID", inode "DFID"(%p)\n",
1889                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1890                                  PFID(ll_inode2fid(inode)), inode);
1891                 } else {
1892                         lli->lli_fid = body->mbo_fid1;
1893                 }
1894         }
1895
1896         LASSERT(fid_seq(&lli->lli_fid) != 0);
1897
1898         if (body->mbo_valid & OBD_MD_FLSIZE) {
1899                 i_size_write(inode, body->mbo_size);
1900
1901                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1902                        PFID(ll_inode2fid(inode)),
1903                        (unsigned long long)body->mbo_size);
1904
1905                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1906                         inode->i_blocks = body->mbo_blocks;
1907         }
1908
1909         if (body->mbo_valid & OBD_MD_TSTATE) {
1910                 /* Set LLIF_FILE_RESTORING if restore ongoing and
1911                  * clear it when done to ensure to start again
1912                  * glimpsing updated attrs
1913                  */
1914                 if (body->mbo_t_state & MS_RESTORE)
1915                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1916                 else
1917                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1918         }
1919
1920         return 0;
1921 }
1922
1923 int ll_read_inode2(struct inode *inode, void *opaque)
1924 {
1925         struct lustre_md *md = opaque;
1926         struct ll_inode_info *lli = ll_i2info(inode);
1927         int     rc;
1928         ENTRY;
1929
1930         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1931                PFID(&lli->lli_fid), inode);
1932
1933         /* Core attributes from the MDS first.  This is a new inode, and
1934          * the VFS doesn't zero times in the core inode so we have to do
1935          * it ourselves.  They will be overwritten by either MDS or OST
1936          * attributes - we just need to make sure they aren't newer. */
1937         LTIME_S(inode->i_mtime) = 0;
1938         LTIME_S(inode->i_atime) = 0;
1939         LTIME_S(inode->i_ctime) = 0;
1940         inode->i_rdev = 0;
1941         rc = ll_update_inode(inode, md);
1942         if (rc != 0)
1943                 RETURN(rc);
1944
1945         /* OIDEBUG(inode); */
1946
1947 #ifdef HAVE_BACKING_DEV_INFO
1948         /* initializing backing dev info. */
1949         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1950 #endif
1951         if (S_ISREG(inode->i_mode)) {
1952                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1953                 inode->i_op = &ll_file_inode_operations;
1954                 inode->i_fop = sbi->ll_fop;
1955                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1956                 EXIT;
1957         } else if (S_ISDIR(inode->i_mode)) {
1958                 inode->i_op = &ll_dir_inode_operations;
1959                 inode->i_fop = &ll_dir_operations;
1960                 EXIT;
1961         } else if (S_ISLNK(inode->i_mode)) {
1962                 inode->i_op = &ll_fast_symlink_inode_operations;
1963                 EXIT;
1964         } else {
1965                 inode->i_op = &ll_special_inode_operations;
1966
1967                 init_special_inode(inode, inode->i_mode,
1968                                    inode->i_rdev);
1969
1970                 EXIT;
1971         }
1972
1973         return 0;
1974 }
1975
1976 void ll_delete_inode(struct inode *inode)
1977 {
1978         struct ll_inode_info *lli = ll_i2info(inode);
1979         ENTRY;
1980
1981         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1982                 /* It is last chance to write out dirty pages,
1983                  * otherwise we may lose data while umount */
1984                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
1985
1986         truncate_inode_pages_final(&inode->i_data);
1987
1988         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
1989                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
1990                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
1991
1992 #ifdef HAVE_SBOPS_EVICT_INODE
1993         ll_clear_inode(inode);
1994 #endif
1995         clear_inode(inode);
1996
1997         EXIT;
1998 }
1999
2000 int ll_iocontrol(struct inode *inode, struct file *file,
2001                  unsigned int cmd, unsigned long arg)
2002 {
2003         struct ll_sb_info *sbi = ll_i2sbi(inode);
2004         struct ptlrpc_request *req = NULL;
2005         int rc, flags = 0;
2006         ENTRY;
2007
2008         switch(cmd) {
2009         case FSFILT_IOC_GETFLAGS: {
2010                 struct mdt_body *body;
2011                 struct md_op_data *op_data;
2012
2013                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2014                                              0, 0, LUSTRE_OPC_ANY,
2015                                              NULL);
2016                 if (IS_ERR(op_data))
2017                         RETURN(PTR_ERR(op_data));
2018
2019                 op_data->op_valid = OBD_MD_FLFLAGS;
2020                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2021                 ll_finish_md_op_data(op_data);
2022                 if (rc) {
2023                         CERROR("%s: failure inode "DFID": rc = %d\n",
2024                                sbi->ll_md_exp->exp_obd->obd_name,
2025                                PFID(ll_inode2fid(inode)), rc);
2026                         RETURN(-abs(rc));
2027                 }
2028
2029                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2030
2031                 flags = body->mbo_flags;
2032
2033                 ptlrpc_req_finished(req);
2034
2035                 RETURN(put_user(flags, (int __user *)arg));
2036         }
2037         case FSFILT_IOC_SETFLAGS: {
2038                 struct iattr *attr;
2039                 struct md_op_data *op_data;
2040                 struct cl_object *obj;
2041
2042                 if (get_user(flags, (int __user *)arg))
2043                         RETURN(-EFAULT);
2044
2045                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2046                                              LUSTRE_OPC_ANY, NULL);
2047                 if (IS_ERR(op_data))
2048                         RETURN(PTR_ERR(op_data));
2049
2050                 op_data->op_attr_flags = flags;
2051                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2052                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2053                 ll_finish_md_op_data(op_data);
2054                 ptlrpc_req_finished(req);
2055                 if (rc)
2056                         RETURN(rc);
2057
2058                 inode->i_flags = ll_ext_to_inode_flags(flags);
2059
2060                 obj = ll_i2info(inode)->lli_clob;
2061                 if (obj == NULL)
2062                         RETURN(0);
2063
2064                 OBD_ALLOC_PTR(attr);
2065                 if (attr == NULL)
2066                         RETURN(-ENOMEM);
2067
2068                 attr->ia_valid = ATTR_ATTR_FLAG;
2069                 rc = cl_setattr_ost(obj, attr, flags);
2070
2071                 OBD_FREE_PTR(attr);
2072                 RETURN(rc);
2073         }
2074         default:
2075                 RETURN(-ENOSYS);
2076         }
2077
2078         RETURN(0);
2079 }
2080
2081 int ll_flush_ctx(struct inode *inode)
2082 {
2083         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2084
2085         CDEBUG(D_SEC, "flush context for user %d\n",
2086                from_kuid(&init_user_ns, current_uid()));
2087
2088         obd_set_info_async(NULL, sbi->ll_md_exp,
2089                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2090                            0, NULL, NULL);
2091         obd_set_info_async(NULL, sbi->ll_dt_exp,
2092                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2093                            0, NULL, NULL);
2094         return 0;
2095 }
2096
2097 /* umount -f client means force down, don't save state */
2098 void ll_umount_begin(struct super_block *sb)
2099 {
2100         struct ll_sb_info *sbi = ll_s2sbi(sb);
2101         struct obd_device *obd;
2102         struct obd_ioctl_data *ioc_data;
2103         struct l_wait_info lwi;
2104         wait_queue_head_t waitq;
2105         ENTRY;
2106
2107         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2108                sb->s_count, atomic_read(&sb->s_active));
2109
2110         obd = class_exp2obd(sbi->ll_md_exp);
2111         if (obd == NULL) {
2112                 CERROR("Invalid MDC connection handle %#llx\n",
2113                        sbi->ll_md_exp->exp_handle.h_cookie);
2114                 EXIT;
2115                 return;
2116         }
2117         obd->obd_force = 1;
2118
2119         obd = class_exp2obd(sbi->ll_dt_exp);
2120         if (obd == NULL) {
2121                 CERROR("Invalid LOV connection handle %#llx\n",
2122                        sbi->ll_dt_exp->exp_handle.h_cookie);
2123                 EXIT;
2124                 return;
2125         }
2126         obd->obd_force = 1;
2127
2128         OBD_ALLOC_PTR(ioc_data);
2129         if (ioc_data) {
2130                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2131                               sizeof *ioc_data, ioc_data, NULL);
2132
2133                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2134                               sizeof *ioc_data, ioc_data, NULL);
2135
2136                 OBD_FREE_PTR(ioc_data);
2137         }
2138
2139         /* Really, we'd like to wait until there are no requests outstanding,
2140          * and then continue.  For now, we just periodically checking for vfs
2141          * to decrement mnt_cnt and hope to finish it within 10sec.
2142          */
2143         init_waitqueue_head(&waitq);
2144         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2145                                    cfs_time_seconds(1), NULL, NULL);
2146         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2147
2148         EXIT;
2149 }
2150
2151 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2152 {
2153         struct ll_sb_info *sbi = ll_s2sbi(sb);
2154         char *profilenm = get_profile_name(sb);
2155         int err;
2156         __u32 read_only;
2157
2158         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2159                 read_only = *flags & MS_RDONLY;
2160                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2161                                          sizeof(KEY_READ_ONLY),
2162                                          KEY_READ_ONLY, sizeof(read_only),
2163                                          &read_only, NULL);
2164                 if (err) {
2165                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2166                                       profilenm, read_only ?
2167                                       "read-only" : "read-write", err);
2168                         return err;
2169                 }
2170
2171                 if (read_only)
2172                         sb->s_flags |= MS_RDONLY;
2173                 else
2174                         sb->s_flags &= ~MS_RDONLY;
2175
2176                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2177                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2178                                       read_only ?  "read-only" : "read-write");
2179         }
2180         return 0;
2181 }
2182
2183 /**
2184  * Cleanup the open handle that is cached on MDT-side.
2185  *
2186  * For open case, the client side open handling thread may hit error
2187  * after the MDT grant the open. Under such case, the client should
2188  * send close RPC to the MDT as cleanup; otherwise, the open handle
2189  * on the MDT will be leaked there until the client umount or evicted.
2190  *
2191  * In further, if someone unlinked the file, because the open handle
2192  * holds the reference on such file/object, then it will block the
2193  * subsequent threads that want to locate such object via FID.
2194  *
2195  * \param[in] sb        super block for this file-system
2196  * \param[in] open_req  pointer to the original open request
2197  */
2198 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2199 {
2200         struct mdt_body                 *body;
2201         struct md_op_data               *op_data;
2202         struct ptlrpc_request           *close_req = NULL;
2203         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2204         ENTRY;
2205
2206         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2207         OBD_ALLOC_PTR(op_data);
2208         if (op_data == NULL) {
2209                 CWARN("%s: cannot allocate op_data to release open handle for "
2210                       DFID"\n",
2211                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2212
2213                 RETURN_EXIT;
2214         }
2215
2216         op_data->op_fid1 = body->mbo_fid1;
2217         op_data->op_handle = body->mbo_handle;
2218         op_data->op_mod_time = ktime_get_real_seconds();
2219         md_close(exp, op_data, NULL, &close_req);
2220         ptlrpc_req_finished(close_req);
2221         ll_finish_md_op_data(op_data);
2222
2223         EXIT;
2224 }
2225
2226 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2227                   struct super_block *sb, struct lookup_intent *it)
2228 {
2229         struct ll_sb_info *sbi = NULL;
2230         struct lustre_md md = { NULL };
2231         int rc;
2232         ENTRY;
2233
2234         LASSERT(*inode || sb);
2235         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2236         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2237                               sbi->ll_md_exp, &md);
2238         if (rc != 0)
2239                 GOTO(cleanup, rc);
2240
2241         if (*inode) {
2242                 rc = ll_update_inode(*inode, &md);
2243                 if (rc != 0)
2244                         GOTO(out, rc);
2245         } else {
2246                 LASSERT(sb != NULL);
2247
2248                 /*
2249                  * At this point server returns to client's same fid as client
2250                  * generated for creating. So using ->fid1 is okay here.
2251                  */
2252                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2253                         CERROR("%s: Fid is insane "DFID"\n",
2254                                 ll_get_fsname(sb, NULL, 0),
2255                                 PFID(&md.body->mbo_fid1));
2256                         GOTO(out, rc = -EINVAL);
2257                 }
2258
2259                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2260                                              sbi->ll_flags & LL_SBI_32BIT_API),
2261                                  &md);
2262                 if (IS_ERR(*inode)) {
2263 #ifdef CONFIG_FS_POSIX_ACL
2264                         if (md.posix_acl) {
2265                                 posix_acl_release(md.posix_acl);
2266                                 md.posix_acl = NULL;
2267                         }
2268 #endif
2269                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2270                         *inode = NULL;
2271                         CERROR("new_inode -fatal: rc %d\n", rc);
2272                         GOTO(out, rc);
2273                 }
2274         }
2275
2276         /* Handling piggyback layout lock.
2277          * Layout lock can be piggybacked by getattr and open request.
2278          * The lsm can be applied to inode only if it comes with a layout lock
2279          * otherwise correct layout may be overwritten, for example:
2280          * 1. proc1: mdt returns a lsm but not granting layout
2281          * 2. layout was changed by another client
2282          * 3. proc2: refresh layout and layout lock granted
2283          * 4. proc1: to apply a stale layout */
2284         if (it != NULL && it->it_lock_mode != 0) {
2285                 struct lustre_handle lockh;
2286                 struct ldlm_lock *lock;
2287
2288                 lockh.cookie = it->it_lock_handle;
2289                 lock = ldlm_handle2lock(&lockh);
2290                 LASSERT(lock != NULL);
2291                 if (ldlm_has_layout(lock)) {
2292                         struct cl_object_conf conf;
2293
2294                         memset(&conf, 0, sizeof(conf));
2295                         conf.coc_opc = OBJECT_CONF_SET;
2296                         conf.coc_inode = *inode;
2297                         conf.coc_lock = lock;
2298                         conf.u.coc_layout = md.layout;
2299                         (void)ll_layout_conf(*inode, &conf);
2300                 }
2301                 LDLM_LOCK_PUT(lock);
2302         }
2303
2304         GOTO(out, rc = 0);
2305
2306 out:
2307         md_free_lustre_md(sbi->ll_md_exp, &md);
2308
2309 cleanup:
2310         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2311                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2312
2313         return rc;
2314 }
2315
2316 int ll_obd_statfs(struct inode *inode, void __user *arg)
2317 {
2318         struct ll_sb_info *sbi = NULL;
2319         struct obd_export *exp;
2320         char *buf = NULL;
2321         struct obd_ioctl_data *data = NULL;
2322         __u32 type;
2323         int len = 0, rc;
2324
2325         if (!inode || !(sbi = ll_i2sbi(inode)))
2326                 GOTO(out_statfs, rc = -EINVAL);
2327
2328         rc = obd_ioctl_getdata(&buf, &len, arg);
2329         if (rc)
2330                 GOTO(out_statfs, rc);
2331
2332         data = (void*)buf;
2333         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2334             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2335                 GOTO(out_statfs, rc = -EINVAL);
2336
2337         if (data->ioc_inllen1 != sizeof(__u32) ||
2338             data->ioc_inllen2 != sizeof(__u32) ||
2339             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2340             data->ioc_plen2 != sizeof(struct obd_uuid))
2341                 GOTO(out_statfs, rc = -EINVAL);
2342
2343         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2344         if (type & LL_STATFS_LMV)
2345                 exp = sbi->ll_md_exp;
2346         else if (type & LL_STATFS_LOV)
2347                 exp = sbi->ll_dt_exp;
2348         else
2349                 GOTO(out_statfs, rc = -ENODEV);
2350
2351         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2352         if (rc)
2353                 GOTO(out_statfs, rc);
2354 out_statfs:
2355         OBD_FREE_LARGE(buf, len);
2356         return rc;
2357 }
2358
2359 int ll_process_config(struct lustre_cfg *lcfg)
2360 {
2361         struct super_block *sb;
2362         unsigned long x;
2363         int rc = 0;
2364         char *ptr;
2365
2366         /* The instance name contains the sb: lustre-client-aacfe000 */
2367         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2368         if (!ptr || !*(++ptr))
2369                 return -EINVAL;
2370         if (sscanf(ptr, "%lx", &x) != 1)
2371                 return -EINVAL;
2372         sb = (struct super_block *)x;
2373         /* This better be a real Lustre superblock! */
2374         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2375
2376         /* Note we have not called client_common_fill_super yet, so
2377            proc fns must be able to handle that! */
2378         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2379                                       lcfg, sb);
2380         if (rc > 0)
2381                 rc = 0;
2382         return rc;
2383 }
2384
2385 /* this function prepares md_op_data hint for passing it down to MD stack. */
2386 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2387                                       struct inode *i1, struct inode *i2,
2388                                       const char *name, size_t namelen,
2389                                       __u32 mode, __u32 opc, void *data)
2390 {
2391         LASSERT(i1 != NULL);
2392
2393         if (name == NULL) {
2394                 /* Do not reuse namelen for something else. */
2395                 if (namelen != 0)
2396                         return ERR_PTR(-EINVAL);
2397         } else {
2398                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2399                         return ERR_PTR(-ENAMETOOLONG);
2400
2401                 if (!lu_name_is_valid_2(name, namelen))
2402                         return ERR_PTR(-EINVAL);
2403         }
2404
2405         if (op_data == NULL)
2406                 OBD_ALLOC_PTR(op_data);
2407
2408         if (op_data == NULL)
2409                 return ERR_PTR(-ENOMEM);
2410
2411         ll_i2gids(op_data->op_suppgids, i1, i2);
2412         op_data->op_fid1 = *ll_inode2fid(i1);
2413         op_data->op_default_stripe_offset = -1;
2414         if (S_ISDIR(i1->i_mode)) {
2415                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2416                 if (opc == LUSTRE_OPC_MKDIR)
2417                         op_data->op_default_stripe_offset =
2418                                    ll_i2info(i1)->lli_def_stripe_offset;
2419         }
2420
2421         if (i2) {
2422                 op_data->op_fid2 = *ll_inode2fid(i2);
2423                 if (S_ISDIR(i2->i_mode))
2424                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2425         } else {
2426                 fid_zero(&op_data->op_fid2);
2427         }
2428
2429         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2430                 op_data->op_cli_flags |= CLI_HASH64;
2431
2432         if (ll_need_32bit_api(ll_i2sbi(i1)))
2433                 op_data->op_cli_flags |= CLI_API32;
2434
2435         op_data->op_name = name;
2436         op_data->op_namelen = namelen;
2437         op_data->op_mode = mode;
2438         op_data->op_mod_time = cfs_time_current_sec();
2439         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2440         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2441         op_data->op_cap = cfs_curproc_cap_pack();
2442         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2443              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2444                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2445         } else {
2446                 op_data->op_mds = 0;
2447         }
2448         op_data->op_data = data;
2449
2450         return op_data;
2451 }
2452
2453 void ll_finish_md_op_data(struct md_op_data *op_data)
2454 {
2455         security_release_secctx(op_data->op_file_secctx,
2456                                 op_data->op_file_secctx_size);
2457         OBD_FREE_PTR(op_data);
2458 }
2459
2460 #ifdef HAVE_SUPEROPS_USE_DENTRY
2461 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2462 #else
2463 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2464 #endif
2465 {
2466         struct ll_sb_info *sbi;
2467
2468 #ifdef HAVE_SUPEROPS_USE_DENTRY
2469         LASSERT((seq != NULL) && (dentry != NULL));
2470         sbi = ll_s2sbi(dentry->d_sb);
2471 #else
2472         LASSERT((seq != NULL) && (vfs != NULL));
2473         sbi = ll_s2sbi(vfs->mnt_sb);
2474 #endif
2475
2476         if (sbi->ll_flags & LL_SBI_NOLCK)
2477                 seq_puts(seq, ",nolock");
2478
2479         if (sbi->ll_flags & LL_SBI_FLOCK)
2480                 seq_puts(seq, ",flock");
2481
2482         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2483                 seq_puts(seq, ",localflock");
2484
2485         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2486                 seq_puts(seq, ",user_xattr");
2487
2488         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2489                 seq_puts(seq, ",lazystatfs");
2490
2491         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2492                 seq_puts(seq, ",user_fid2path");
2493
2494         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2495                 seq_puts(seq, ",always_ping");
2496
2497         RETURN(0);
2498 }
2499
2500 /**
2501  * Get obd name by cmd, and copy out to user space
2502  */
2503 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2504 {
2505         struct ll_sb_info *sbi = ll_i2sbi(inode);
2506         struct obd_device *obd;
2507         ENTRY;
2508
2509         if (cmd == OBD_IOC_GETDTNAME)
2510                 obd = class_exp2obd(sbi->ll_dt_exp);
2511         else if (cmd == OBD_IOC_GETMDNAME)
2512                 obd = class_exp2obd(sbi->ll_md_exp);
2513         else
2514                 RETURN(-EINVAL);
2515
2516         if (!obd)
2517                 RETURN(-ENOENT);
2518
2519         if (copy_to_user((void __user *)arg, obd->obd_name,
2520                          strlen(obd->obd_name) + 1))
2521                 RETURN(-EFAULT);
2522
2523         RETURN(0);
2524 }
2525
2526 /**
2527  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2528  * fsname will be returned in this buffer; otherwise, a static buffer will be
2529  * used to store the fsname and returned to caller.
2530  */
2531 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2532 {
2533         static char fsname_static[MTI_NAME_MAXLEN];
2534         struct lustre_sb_info *lsi = s2lsi(sb);
2535         char *ptr;
2536         int len;
2537
2538         if (buf == NULL) {
2539                 /* this means the caller wants to use static buffer
2540                  * and it doesn't care about race. Usually this is
2541                  * in error reporting path */
2542                 buf = fsname_static;
2543                 buflen = sizeof(fsname_static);
2544         }
2545
2546         len = strlen(lsi->lsi_lmd->lmd_profile);
2547         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2548         if (ptr && (strcmp(ptr, "-client") == 0))
2549                 len -= 7;
2550
2551         if (unlikely(len >= buflen))
2552                 len = buflen - 1;
2553         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2554         buf[len] = '\0';
2555
2556         return buf;
2557 }
2558
2559 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2560 {
2561         char *path = NULL;
2562
2563         struct path p;
2564
2565         p.dentry = dentry;
2566         p.mnt = current->fs->root.mnt;
2567         path_get(&p);
2568         path = d_path(&p, buf, bufsize);
2569         path_put(&p);
2570         return path;
2571 }
2572
2573 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2574 {
2575         char *buf, *path = NULL;
2576         struct dentry *dentry = NULL;
2577         struct inode *inode = page->mapping->host;
2578
2579         /* this can be called inside spin lock so use GFP_ATOMIC. */
2580         buf = (char *)__get_free_page(GFP_ATOMIC);
2581         if (buf != NULL) {
2582                 dentry = d_find_alias(page->mapping->host);
2583                 if (dentry != NULL)
2584                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2585         }
2586
2587         CDEBUG(D_WARNING,
2588                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2589                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2590                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2591                PFID(ll_inode2fid(inode)),
2592                (path && !IS_ERR(path)) ? path : "", ioret);
2593
2594         if (dentry != NULL)
2595                 dput(dentry);
2596
2597         if (buf != NULL)
2598                 free_page((unsigned long)buf);
2599 }
2600
2601 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2602                         struct lov_user_md **kbuf)
2603 {
2604         struct lov_user_md      lum;
2605         ssize_t                 lum_size;
2606         ENTRY;
2607
2608         if (copy_from_user(&lum, md, sizeof(lum)))
2609                 RETURN(-EFAULT);
2610
2611         lum_size = ll_lov_user_md_size(&lum);
2612         if (lum_size < 0)
2613                 RETURN(lum_size);
2614
2615         OBD_ALLOC(*kbuf, lum_size);
2616         if (*kbuf == NULL)
2617                 RETURN(-ENOMEM);
2618
2619         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2620                 OBD_FREE(*kbuf, lum_size);
2621                 RETURN(-EFAULT);
2622         }
2623
2624         RETURN(lum_size);
2625 }
2626
2627 /*
2628  * Compute llite root squash state after a change of root squash
2629  * configuration setting or add/remove of a lnet nid
2630  */
2631 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2632 {
2633         struct root_squash_info *squash = &sbi->ll_squash;
2634         int i;
2635         bool matched;
2636         struct lnet_process_id id;
2637
2638         /* Update norootsquash flag */
2639         down_write(&squash->rsi_sem);
2640         if (list_empty(&squash->rsi_nosquash_nids))
2641                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2642         else {
2643                 /* Do not apply root squash as soon as one of our NIDs is
2644                  * in the nosquash_nids list */
2645                 matched = false;
2646                 i = 0;
2647                 while (LNetGetId(i++, &id) != -ENOENT) {
2648                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2649                                 continue;
2650                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2651                                 matched = true;
2652                                 break;
2653                         }
2654                 }
2655                 if (matched)
2656                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2657                 else
2658                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2659         }
2660         up_write(&squash->rsi_sem);
2661 }
2662
2663 /**
2664  * Parse linkea content to extract information about a given hardlink
2665  *
2666  * \param[in]   ldata      - Initialized linkea data
2667  * \param[in]   linkno     - Link identifier
2668  * \param[out]  parent_fid - The entry's parent FID
2669  * \param[out]  ln         - Entry name destination buffer
2670  *
2671  * \retval 0 on success
2672  * \retval Appropriate negative error code on failure
2673  */
2674 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2675                             struct lu_fid *parent_fid, struct lu_name *ln)
2676 {
2677         unsigned int    idx;
2678         int             rc;
2679         ENTRY;
2680
2681         rc = linkea_init_with_rec(ldata);
2682         if (rc < 0)
2683                 RETURN(rc);
2684
2685         if (linkno >= ldata->ld_leh->leh_reccount)
2686                 /* beyond last link */
2687                 RETURN(-ENODATA);
2688
2689         linkea_first_entry(ldata);
2690         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2691                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2692                                     parent_fid);
2693                 if (idx == linkno)
2694                         break;
2695
2696                 linkea_next_entry(ldata);
2697         }
2698
2699         if (idx < linkno)
2700                 RETURN(-ENODATA);
2701
2702         RETURN(0);
2703 }
2704
2705 /**
2706  * Get parent FID and name of an identified link. Operation is performed for
2707  * a given link number, letting the caller iterate over linkno to list one or
2708  * all links of an entry.
2709  *
2710  * \param[in]     file - File descriptor against which to perform the operation
2711  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2712  *                       on and the available size. It is eventually filled with
2713  *                       the requested information or left untouched on error
2714  *
2715  * \retval - 0 on success
2716  * \retval - Appropriate negative error code on failure
2717  */
2718 int ll_getparent(struct file *file, struct getparent __user *arg)
2719 {
2720         struct dentry           *dentry = file_dentry(file);
2721         struct inode            *inode = file_inode(file);
2722         struct linkea_data      *ldata;
2723         struct lu_buf            buf = LU_BUF_NULL;
2724         struct lu_name           ln;
2725         struct lu_fid            parent_fid;
2726         __u32                    linkno;
2727         __u32                    name_size;
2728         int                      rc;
2729
2730         ENTRY;
2731
2732         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2733             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2734                 RETURN(-EPERM);
2735
2736         if (get_user(name_size, &arg->gp_name_size))
2737                 RETURN(-EFAULT);
2738
2739         if (get_user(linkno, &arg->gp_linkno))
2740                 RETURN(-EFAULT);
2741
2742         if (name_size > PATH_MAX)
2743                 RETURN(-EINVAL);
2744
2745         OBD_ALLOC(ldata, sizeof(*ldata));
2746         if (ldata == NULL)
2747                 RETURN(-ENOMEM);
2748
2749         rc = linkea_data_new(ldata, &buf);
2750         if (rc < 0)
2751                 GOTO(ldata_free, rc);
2752
2753         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2754         if (rc < 0)
2755                 GOTO(lb_free, rc);
2756
2757         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2758         if (rc < 0)
2759                 GOTO(lb_free, rc);
2760
2761         if (ln.ln_namelen >= name_size)
2762                 GOTO(lb_free, rc = -EOVERFLOW);
2763
2764         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2765                 GOTO(lb_free, rc = -EFAULT);
2766
2767         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2768                 GOTO(lb_free, rc = -EFAULT);
2769
2770         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2771                 GOTO(lb_free, rc = -EFAULT);
2772
2773 lb_free:
2774         lu_buf_free(&buf);
2775 ldata_free:
2776         OBD_FREE(ldata, sizeof(*ldata));
2777
2778         RETURN(rc);
2779 }