lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/statfs.h>
  41 #include <linux/time.h>
  42 #include <linux/types.h>
  43 #include <linux/version.h>
  44 #include <linux/mm.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <linux/security.h>
  50
  51 #include <uapi/linux/lustre/lustre_ioctl.h>
  52 #include <lustre_ha.h>
  53 #include <lustre_dlm.h>
  54 #include <lprocfs_status.h>
  55 #include <lustre_disk.h>
  56 #include <uapi/linux/lustre/lustre_param.h>
  57 #include <lustre_log.h>
  58 #include <cl_object.h>
  59 #include <obd_cksum.h>
  60 #include "llite_internal.h"
  61
  62 struct kmem_cache *ll_file_data_slab;
  63
  64 #ifndef log2
  65 #define log2(n) ffz(~(n))
  66 #endif
  67
  68 static struct ll_sb_info *ll_init_sbi(void)
  69 {
  70         struct ll_sb_info *sbi = NULL;
  71         unsigned long pages;
  72         unsigned long lru_page_max;
  73         struct sysinfo si;
  74         class_uuid_t uuid;
  75         int i;
  76         ENTRY;
  77
  78         OBD_ALLOC_PTR(sbi);
  79         if (sbi == NULL)
  80                 RETURN(NULL);
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  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 = -1;
 103
 104         ll_generate_random_uuid(uuid);
 105         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 106         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 107
 108         sbi->ll_flags |= LL_SBI_VERBOSE;
 109 #ifdef ENABLE_CHECKSUM
 110         sbi->ll_flags |= LL_SBI_CHECKSUM;
 111 #endif
 112
 113 #ifdef HAVE_LRU_RESIZE_SUPPORT
 114         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 115 #endif
 116         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 117
 118         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 119                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 120                                pp_r_hist.oh_lock);
 121                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 122                                pp_w_hist.oh_lock);
 123         }
 124
 125         /* metadata statahead is enabled by default */
 126         sbi->ll_sa_max = LL_SA_RPC_DEF;
 127         atomic_set(&sbi->ll_sa_total, 0);
 128         atomic_set(&sbi->ll_sa_wrong, 0);
 129         atomic_set(&sbi->ll_sa_running, 0);
 130         atomic_set(&sbi->ll_agl_total, 0);
 131         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 132         sbi->ll_flags |= LL_SBI_FAST_READ;
 133         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 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         /* pass client page size via ocd_grant_blkbits, the server should report
 200          * back its backend blocksize for grant calculation purpose */
 201         data->ocd_grant_blkbits = PAGE_SHIFT;
 202
 203         /* indicate MDT features supported by this client */
 204         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 205                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 206                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 207                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 208                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 209                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 210                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 211                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 212                                   OBD_CONNECT_64BITHASH |
 213                                   OBD_CONNECT_EINPROGRESS |
 214                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 215                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 216                                   OBD_CONNECT_MAX_EASIZE |
 217                                   OBD_CONNECT_FLOCK_DEAD |
 218                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 219                                   OBD_CONNECT_OPEN_BY_FID |
 220                                   OBD_CONNECT_DIR_STRIPE |
 221                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 222                                   OBD_CONNECT_SUBTREE |
 223                                   OBD_CONNECT_MULTIMODRPCS |
 224                                   OBD_CONNECT_GRANT_PARAM |
 225                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 226
 227         data->ocd_connect_flags2 = OBD_CONNECT2_FLR;
 228
 229 #ifdef HAVE_LRU_RESIZE_SUPPORT
 230         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 231                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 232 #endif
 233 #ifdef CONFIG_FS_POSIX_ACL
 234         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 235                                    OBD_CONNECT_LARGE_ACL;
 236 #endif
 237
 238         data->ocd_cksum_types = cksum_types_supported_client();
 239
 240         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 241                 /* flag mdc connection as lightweight, only used for test
 242                  * purpose, use with care */
 243                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 244
 245         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 246         data->ocd_version = LUSTRE_VERSION_CODE;
 247
 248         if (sb->s_flags & MS_RDONLY)
 249                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 250         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 251                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 252
 253 #ifdef MS_NOSEC
 254         /* Setting this indicates we correctly support S_NOSEC (See kernel
 255          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 256          */
 257         sb->s_flags |= MS_NOSEC;
 258 #endif
 259
 260         if (sbi->ll_flags & LL_SBI_FLOCK)
 261                 sbi->ll_fop = &ll_file_operations_flock;
 262         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 263                 sbi->ll_fop = &ll_file_operations;
 264         else
 265                 sbi->ll_fop = &ll_file_operations_noflock;
 266
 267         /* always ping even if server suppress_pings */
 268         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 269                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 270
 271 #if defined(HAVE_SECURITY_DENTRY_INIT_SECURITY) && defined(CONFIG_SECURITY)
 272         data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX;
 273 #endif /* HAVE_SECURITY_DENTRY_INIT_SECURITY */
 274
 275         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 276
 277         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 278         if (err == -EBUSY) {
 279                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 280                                    "recovery, of which this client is not a "
 281                                    "part. Please wait for recovery to complete,"
 282                                    " abort, or time out.\n", md);
 283                 GOTO(out, err);
 284         } else if (err) {
 285                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 286                 GOTO(out, err);
 287         }
 288
 289         sbi->ll_md_exp->exp_connect_data = *data;
 290
 291         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 292                            LUSTRE_SEQ_METADATA);
 293         if (err) {
 294                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 295                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 296                 GOTO(out_md, err);
 297         }
 298
 299         /* For mount, we only need fs info from MDT0, and also in DNE, it
 300          * can make sure the client can be mounted as long as MDT0 is
 301          * avaible */
 302         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 303                         ktime_get_seconds() -OBD_STATFS_CACHE_SECONDS,
 304                         OBD_STATFS_FOR_MDT0);
 305         if (err)
 306                 GOTO(out_md_fid, err);
 307
 308         /* This needs to be after statfs to ensure connect has finished.
 309          * Note that "data" does NOT contain the valid connect reply.
 310          * If connecting to a 1.8 server there will be no LMV device, so
 311          * we can access the MDC export directly and exp_connect_flags will
 312          * be non-zero, but if accessing an upgraded 2.1 server it will
 313          * have the correct flags filled in.
 314          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 315         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 316         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 317             valid != CLIENT_CONNECT_MDT_REQD) {
 318                 char *buf;
 319
 320                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 321                 obd_connect_flags2str(buf, PAGE_SIZE,
 322                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 323                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 324                                    "feature(s) needed for correct operation "
 325                                    "of this client (%s). Please upgrade "
 326                                    "server or downgrade client.\n",
 327                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 328                 OBD_FREE(buf, PAGE_SIZE);
 329                 GOTO(out_md_fid, err = -EPROTO);
 330         }
 331
 332         size = sizeof(*data);
 333         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 334                            KEY_CONN_DATA,  &size, data);
 335         if (err) {
 336                 CERROR("%s: Get connect data failed: rc = %d\n",
 337                        sbi->ll_md_exp->exp_obd->obd_name, err);
 338                 GOTO(out_md_fid, err);
 339         }
 340
 341         LASSERT(osfs->os_bsize);
 342         sb->s_blocksize = osfs->os_bsize;
 343         sb->s_blocksize_bits = log2(osfs->os_bsize);
 344         sb->s_magic = LL_SUPER_MAGIC;
 345         sb->s_maxbytes = MAX_LFS_FILESIZE;
 346         sbi->ll_namelen = osfs->os_namelen;
 347         sbi->ll_mnt.mnt = current->fs->root.mnt;
 348
 349         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 350             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 351                 LCONSOLE_INFO("Disabling user_xattr feature because "
 352                               "it is not supported on the server\n");
 353                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 354         }
 355
 356         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 357 #ifdef MS_POSIXACL
 358                 sb->s_flags |= MS_POSIXACL;
 359 #endif
 360                 sbi->ll_flags |= LL_SBI_ACL;
 361         } else {
 362                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 363 #ifdef MS_POSIXACL
 364                 sb->s_flags &= ~MS_POSIXACL;
 365 #endif
 366                 sbi->ll_flags &= ~LL_SBI_ACL;
 367         }
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 370                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 371
 372         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 373                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 374
 375         if (obd_connect_has_secctx(data))
 376                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 377
 378         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 379                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 380                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 381                                       "unknown maximum xattr size.\n", dt);
 382                 } else if (!sbi->ll_xattr_cache_set) {
 383                         /* If xattr_cache is already set (no matter 0 or 1)
 384                          * during processing llog, it won't be enabled here. */
 385                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 386                         sbi->ll_xattr_cache_enabled = 1;
 387                 }
 388         }
 389
 390         obd = class_name2obd(dt);
 391         if (!obd) {
 392                 CERROR("DT %s: not setup or attached\n", dt);
 393                 GOTO(out_md_fid, err = -ENODEV);
 394         }
 395
 396         /* pass client page size via ocd_grant_blkbits, the server should report
 397          * back its backend blocksize for grant calculation purpose */
 398         data->ocd_grant_blkbits = PAGE_SHIFT;
 399
 400         /* indicate OST features supported by this client */
 401         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 402                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 403                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 404                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 405                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 406                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 407                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 408                                   OBD_CONNECT_EINPROGRESS |
 409                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 410                                   OBD_CONNECT_LAYOUTLOCK |
 411                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 412                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 413                                   OBD_CONNECT_FLAGS2;
 414
 415 /* The client currently advertises support for OBD_CONNECT_LOCKAHEAD_OLD so it
 416  * can interoperate with an older version of lockahead which was released prior
 417  * to landing in master. This support will be dropped when 2.13 development
 418  * starts.  At the point, we should not just drop the connect flag (below), we
 419  * should also remove the support in the code.
 420  *
 421  * Removing it means a few things:
 422  * 1. Remove this section here
 423  * 2. Remove CEF_NONBLOCK in ll_file_lockahead()
 424  * 3. Remove function exp_connect_lockahead_old
 425  * 4. Remove LDLM_FL_LOCKAHEAD_OLD_RESERVED in lustre_dlm_flags.h
 426  * */
 427 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 12, 50, 0)
 428         data->ocd_connect_flags |= OBD_CONNECT_LOCKAHEAD_OLD;
 429 #endif
 430
 431         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD;
 432
 433         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 434                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 435
 436         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 437          * disabled by default, because it can still be enabled on the
 438          * fly via /proc. As a consequence, we still need to come to an
 439          * agreement on the supported algorithms at connect time */
 440         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 441
 442         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 443                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 444         else
 445                 data->ocd_cksum_types = cksum_types_supported_client();
 446
 447 #ifdef HAVE_LRU_RESIZE_SUPPORT
 448         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 449 #endif
 450         /* always ping even if server suppress_pings */
 451         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 452                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 453
 454         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 455                "ocd_grant: %d\n", data->ocd_connect_flags,
 456                data->ocd_version, data->ocd_grant);
 457
 458         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 459         obd->obd_upcall.onu_upcall = cl_ocd_update;
 460
 461         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 462
 463         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 464                           NULL);
 465         if (err == -EBUSY) {
 466                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 467                                    "recovery, of which this client is not a "
 468                                    "part.  Please wait for recovery to "
 469                                    "complete, abort, or time out.\n", dt);
 470                 GOTO(out_md, err);
 471         } else if (err) {
 472                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 473                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 474                 GOTO(out_md, err);
 475         }
 476
 477         sbi->ll_dt_exp->exp_connect_data = *data;
 478
 479         /* Don't change value if it was specified in the config log */
 480         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1)
 481                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 482                         max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX,
 483                               (data->ocd_brw_size >> PAGE_SHIFT));
 484
 485         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 486                            LUSTRE_SEQ_METADATA);
 487         if (err) {
 488                 CERROR("%s: Can't init data layer FID infrastructure, "
 489                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 490                 GOTO(out_dt, err);
 491         }
 492
 493         mutex_lock(&sbi->ll_lco.lco_lock);
 494         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 495         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 496         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 497         mutex_unlock(&sbi->ll_lco.lco_lock);
 498
 499         fid_zero(&sbi->ll_root_fid);
 500         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 501                            &sbi->ll_root_fid);
 502         if (err) {
 503                 CERROR("cannot mds_connect: rc = %d\n", err);
 504                 GOTO(out_lock_cn_cb, err);
 505         }
 506         if (!fid_is_sane(&sbi->ll_root_fid)) {
 507                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 508                        sbi->ll_md_exp->exp_obd->obd_name,
 509                        PFID(&sbi->ll_root_fid));
 510                 GOTO(out_lock_cn_cb, err = -EINVAL);
 511         }
 512         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 513
 514         sb->s_op = &lustre_super_operations;
 515 #ifdef HAVE_XATTR_HANDLER_FLAGS
 516         sb->s_xattr = ll_xattr_handlers;
 517 #endif
 518 #if THREAD_SIZE >= 8192 /*b=17630*/
 519         sb->s_export_op = &lustre_export_operations;
 520 #endif
 521
 522         /* make root inode
 523          * XXX: move this to after cbd setup? */
 524         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 525         if (sbi->ll_flags & LL_SBI_ACL)
 526                 valid |= OBD_MD_FLACL;
 527
 528         OBD_ALLOC_PTR(op_data);
 529         if (op_data == NULL)
 530                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 531
 532         op_data->op_fid1 = sbi->ll_root_fid;
 533         op_data->op_mode = 0;
 534         op_data->op_valid = valid;
 535
 536         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 537
 538         OBD_FREE_PTR(op_data);
 539         if (err) {
 540                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 541                        sbi->ll_md_exp->exp_obd->obd_name, err);
 542                 GOTO(out_lock_cn_cb, err);
 543         }
 544
 545         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 546                                sbi->ll_md_exp, &lmd);
 547         if (err) {
 548                 CERROR("failed to understand root inode md: rc = %d\n", err);
 549                 ptlrpc_req_finished(request);
 550                 GOTO(out_lock_cn_cb, err);
 551         }
 552
 553         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 554         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 555                                             sbi->ll_flags & LL_SBI_32BIT_API),
 556                        &lmd);
 557         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 558         ptlrpc_req_finished(request);
 559
 560         if (IS_ERR(root)) {
 561 #ifdef CONFIG_FS_POSIX_ACL
 562                 if (lmd.posix_acl) {
 563                         posix_acl_release(lmd.posix_acl);
 564                         lmd.posix_acl = NULL;
 565                 }
 566 #endif
 567                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 568                 root = NULL;
 569                 CERROR("lustre_lite: bad iget4 for root\n");
 570                 GOTO(out_root, err);
 571         }
 572
 573         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 574         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 575                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 576                                  NULL);
 577         if (err) {
 578                 CERROR("%s: Set checksum failed: rc = %d\n",
 579                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 580                 GOTO(out_root, err);
 581         }
 582         cl_sb_init(sb);
 583
 584         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 585                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 586                                  sbi->ll_cache, NULL);
 587         if (err) {
 588                 CERROR("%s: Set cache_set failed: rc = %d\n",
 589                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 590                 GOTO(out_root, err);
 591         }
 592
 593         sb->s_root = d_make_root(root);
 594         if (sb->s_root == NULL) {
 595                 CERROR("%s: can't make root dentry\n",
 596                         ll_get_fsname(sb, NULL, 0));
 597                 GOTO(out_root, err = -ENOMEM);
 598         }
 599 #ifdef HAVE_DCACHE_LOCK
 600         sb->s_root->d_op = &ll_d_ops;
 601 #endif
 602
 603         sbi->ll_sdev_orig = sb->s_dev;
 604
 605         /* We set sb->s_dev equal on all lustre clients in order to support
 606          * NFS export clustering.  NFSD requires that the FSID be the same
 607          * on all clients. */
 608         /* s_dev is also used in lt_compare() to compare two fs, but that is
 609          * only a node-local comparison. */
 610         uuid = obd_get_uuid(sbi->ll_md_exp);
 611         if (uuid != NULL)
 612                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 613
 614         if (data != NULL)
 615                 OBD_FREE_PTR(data);
 616         if (osfs != NULL)
 617                 OBD_FREE_PTR(osfs);
 618
 619         if (sbi->ll_proc_root != NULL) {
 620                 err = lprocfs_ll_register_obd(sb, dt);
 621                 if (err < 0) {
 622                         CERROR("%s: could not register %s in llite: rc = %d\n",
 623                                dt, ll_get_fsname(sb, NULL, 0), err);
 624                         err = 0;
 625                 }
 626                 err = lprocfs_ll_register_obd(sb, md);
 627                 if (err < 0) {
 628                         CERROR("%s: could not register %s in llite: rc = %d\n",
 629                                md, ll_get_fsname(sb, NULL, 0), err);
 630                         err = 0;
 631                 }
 632         }
 633
 634         RETURN(err);
 635 out_root:
 636         if (root)
 637                 iput(root);
 638 out_lock_cn_cb:
 639         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 640 out_dt:
 641         obd_disconnect(sbi->ll_dt_exp);
 642         sbi->ll_dt_exp = NULL;
 643 out_md_fid:
 644         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 645 out_md:
 646         obd_disconnect(sbi->ll_md_exp);
 647         sbi->ll_md_exp = NULL;
 648 out:
 649         if (data != NULL)
 650                 OBD_FREE_PTR(data);
 651         if (osfs != NULL)
 652                 OBD_FREE_PTR(osfs);
 653         return err;
 654 }
 655
 656 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 657 {
 658         int size, rc;
 659
 660         size = sizeof(*lmmsize);
 661         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 662                           KEY_MAX_EASIZE, &size, lmmsize);
 663         if (rc != 0) {
 664                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 665                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 666                 RETURN(rc);
 667         }
 668
 669         size = sizeof(int);
 670         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 671                           KEY_MAX_EASIZE, &size, lmmsize);
 672         if (rc)
 673                 CERROR("Get max mdsize error rc %d\n", rc);
 674
 675         RETURN(rc);
 676 }
 677
 678 /**
 679  * Get the value of the default_easize parameter.
 680  *
 681  * \see client_obd::cl_default_mds_easize
 682  *
 683  * \param[in] sbi       superblock info for this filesystem
 684  * \param[out] lmmsize  pointer to storage location for value
 685  *
 686  * \retval 0            on success
 687  * \retval negative     negated errno on failure
 688  */
 689 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 690 {
 691         int size, rc;
 692
 693         size = sizeof(int);
 694         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 695                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 696         if (rc)
 697                 CERROR("Get default mdsize error rc %d\n", rc);
 698
 699         RETURN(rc);
 700 }
 701
 702 /**
 703  * Set the default_easize parameter to the given value.
 704  *
 705  * \see client_obd::cl_default_mds_easize
 706  *
 707  * \param[in] sbi       superblock info for this filesystem
 708  * \param[in] lmmsize   the size to set
 709  *
 710  * \retval 0            on success
 711  * \retval negative     negated errno on failure
 712  */
 713 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 714 {
 715         int rc;
 716
 717         if (lmmsize < sizeof(struct lov_mds_md) ||
 718             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 719                 return -EINVAL;
 720
 721         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 722                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 723                                 sizeof(int), &lmmsize, NULL);
 724
 725         RETURN(rc);
 726 }
 727
 728 static void client_common_put_super(struct super_block *sb)
 729 {
 730         struct ll_sb_info *sbi = ll_s2sbi(sb);
 731         ENTRY;
 732
 733         cl_sb_fini(sb);
 734
 735         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 736         obd_disconnect(sbi->ll_dt_exp);
 737         sbi->ll_dt_exp = NULL;
 738
 739         lprocfs_ll_unregister_mountpoint(sbi);
 740
 741         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 742         obd_disconnect(sbi->ll_md_exp);
 743         sbi->ll_md_exp = NULL;
 744
 745         EXIT;
 746 }
 747
 748 void ll_kill_super(struct super_block *sb)
 749 {
 750         struct ll_sb_info *sbi;
 751         ENTRY;
 752
 753         /* not init sb ?*/
 754         if (!(sb->s_flags & MS_ACTIVE))
 755                 return;
 756
 757         sbi = ll_s2sbi(sb);
 758         /* we need restore s_dev from changed for clustred NFS before put_super
 759          * because new kernels have cached s_dev and change sb->s_dev in
 760          * put_super not affected real removing devices */
 761         if (sbi) {
 762                 sb->s_dev = sbi->ll_sdev_orig;
 763                 sbi->ll_umounting = 1;
 764
 765                 /* wait running statahead threads to quit */
 766                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 767                         set_current_state(TASK_UNINTERRUPTIBLE);
 768                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 769                 }
 770         }
 771
 772         EXIT;
 773 }
 774
 775 static inline int ll_set_opt(const char *opt, char *data, int fl)
 776 {
 777         if (strncmp(opt, data, strlen(opt)) != 0)
 778                 return(0);
 779         else
 780                 return(fl);
 781 }
 782
 783 /* non-client-specific mount options are parsed in lmd_parse */
 784 static int ll_options(char *options, int *flags)
 785 {
 786         int tmp;
 787         char *s1 = options, *s2;
 788         ENTRY;
 789
 790         if (!options)
 791                 RETURN(0);
 792
 793         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 794
 795         while (*s1) {
 796                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 797                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 798                 if (tmp) {
 799                         *flags |= tmp;
 800                         goto next;
 801                 }
 802                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 803                 if (tmp) {
 804                         *flags |= tmp;
 805                         goto next;
 806                 }
 807                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 808                 if (tmp) {
 809                         *flags |= tmp;
 810                         goto next;
 811                 }
 812                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 813                 if (tmp) {
 814                         *flags &= ~tmp;
 815                         goto next;
 816                 }
 817                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 818                 if (tmp) {
 819                         *flags |= tmp;
 820                         goto next;
 821                 }
 822                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 823                 if (tmp) {
 824                         *flags &= ~tmp;
 825                         goto next;
 826                 }
 827                 tmp = ll_set_opt("context", s1, 1);
 828                 if (tmp)
 829                         goto next;
 830                 tmp = ll_set_opt("fscontext", s1, 1);
 831                 if (tmp)
 832                         goto next;
 833                 tmp = ll_set_opt("defcontext", s1, 1);
 834                 if (tmp)
 835                         goto next;
 836                 tmp = ll_set_opt("rootcontext", s1, 1);
 837                 if (tmp)
 838                         goto next;
 839                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 840                 if (tmp) {
 841                         *flags |= tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 845                 if (tmp) {
 846                         *flags &= ~tmp;
 847                         goto next;
 848                 }
 849
 850                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 851                 if (tmp) {
 852                         *flags |= tmp;
 853                         goto next;
 854                 }
 855                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 856                 if (tmp) {
 857                         *flags &= ~tmp;
 858                         goto next;
 859                 }
 860                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 861                 if (tmp) {
 862                         *flags |= tmp;
 863                         goto next;
 864                 }
 865                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 866                 if (tmp) {
 867                         *flags &= ~tmp;
 868                         goto next;
 869                 }
 870                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 871                 if (tmp) {
 872                         *flags |= tmp;
 873                         goto next;
 874                 }
 875                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 876                 if (tmp) {
 877                         *flags &= ~tmp;
 878                         goto next;
 879                 }
 880                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 881                 if (tmp) {
 882                         *flags |= tmp;
 883                         goto next;
 884                 }
 885                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 886                 if (tmp) {
 887                         *flags |= tmp;
 888                         goto next;
 889                 }
 890                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 891                 if (tmp) {
 892                         *flags &= ~tmp;
 893                         goto next;
 894                 }
 895                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 896                 if (tmp) {
 897                         *flags |= tmp;
 898                         goto next;
 899                 }
 900                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 901                                    s1);
 902                 RETURN(-EINVAL);
 903
 904 next:
 905                 /* Find next opt */
 906                 s2 = strchr(s1, ',');
 907                 if (s2 == NULL)
 908                         break;
 909                 s1 = s2 + 1;
 910         }
 911         RETURN(0);
 912 }
 913
 914 void ll_lli_init(struct ll_inode_info *lli)
 915 {
 916         lli->lli_inode_magic = LLI_INODE_MAGIC;
 917         lli->lli_flags = 0;
 918         spin_lock_init(&lli->lli_lock);
 919         lli->lli_posix_acl = NULL;
 920         /* Do not set lli_fid, it has been initialized already. */
 921         fid_zero(&lli->lli_pfid);
 922         lli->lli_mds_read_och = NULL;
 923         lli->lli_mds_write_och = NULL;
 924         lli->lli_mds_exec_och = NULL;
 925         lli->lli_open_fd_read_count = 0;
 926         lli->lli_open_fd_write_count = 0;
 927         lli->lli_open_fd_exec_count = 0;
 928         mutex_init(&lli->lli_och_mutex);
 929         spin_lock_init(&lli->lli_agl_lock);
 930         spin_lock_init(&lli->lli_layout_lock);
 931         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 932         lli->lli_clob = NULL;
 933
 934         init_rwsem(&lli->lli_xattrs_list_rwsem);
 935         mutex_init(&lli->lli_xattrs_enq_lock);
 936
 937         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 938         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 939                 mutex_init(&lli->lli_readdir_mutex);
 940                 lli->lli_opendir_key = NULL;
 941                 lli->lli_sai = NULL;
 942                 spin_lock_init(&lli->lli_sa_lock);
 943                 lli->lli_opendir_pid = 0;
 944                 lli->lli_sa_enabled = 0;
 945                 lli->lli_def_stripe_offset = -1;
 946         } else {
 947                 mutex_init(&lli->lli_size_mutex);
 948                 lli->lli_symlink_name = NULL;
 949                 init_rwsem(&lli->lli_trunc_sem);
 950                 range_lock_tree_init(&lli->lli_write_tree);
 951                 init_rwsem(&lli->lli_glimpse_sem);
 952                 lli->lli_glimpse_time = ktime_set(0, 0);
 953                 INIT_LIST_HEAD(&lli->lli_agl_list);
 954                 lli->lli_agl_index = 0;
 955                 lli->lli_async_rc = 0;
 956         }
 957         mutex_init(&lli->lli_layout_mutex);
 958         memset(lli->lli_jobid, 0, LUSTRE_JOBID_SIZE);
 959 }
 960
 961 #ifndef HAVE_SUPER_SETUP_BDI_NAME
 962
 963 #define LSI_BDI_INITIALIZED     0x00400000
 964
 965 #ifndef HAVE_BDI_CAP_MAP_COPY
 966 # define BDI_CAP_MAP_COPY       0
 967 #endif
 968
 969 #define MAX_STRING_SIZE 128
 970
 971 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
 972 {
 973         struct  lustre_sb_info *lsi = s2lsi(sb);
 974         char buf[MAX_STRING_SIZE];
 975         va_list args;
 976         int err;
 977
 978         err = bdi_init(&lsi->lsi_bdi);
 979         if (err)
 980                 return err;
 981
 982         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 983         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 984         lsi->lsi_bdi.name = "lustre";
 985         va_start(args, fmt);
 986         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
 987         va_end(args);
 988         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
 989         va_end(args);
 990         if (!err)
 991                 sb->s_bdi = &lsi->lsi_bdi;
 992
 993         return err;
 994 }
 995 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
 996
 997 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 998 {
 999         struct  lustre_profile *lprof = NULL;
1000         struct  lustre_sb_info *lsi = s2lsi(sb);
1001         struct  ll_sb_info *sbi = NULL;
1002         char    *dt = NULL, *md = NULL;
1003         char    *profilenm = get_profile_name(sb);
1004         struct config_llog_instance *cfg;
1005         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1006         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
1007         int     md_len = 0;
1008         int     dt_len = 0;
1009         int     err;
1010         ENTRY;
1011
1012         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1013
1014         try_module_get(THIS_MODULE);
1015
1016         OBD_ALLOC_PTR(cfg);
1017         if (cfg == NULL)
1018                 GOTO(out_free, err = -ENOMEM);
1019
1020         /* client additional sb info */
1021         lsi->lsi_llsbi = sbi = ll_init_sbi();
1022         if (!sbi)
1023                 GOTO(out_free, err = -ENOMEM);
1024
1025         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1026         if (err)
1027                 GOTO(out_free, err);
1028
1029         err = super_setup_bdi_name(sb, "lustre-%p", sb);
1030         if (err)
1031                 GOTO(out_free, err);
1032
1033 #ifndef HAVE_DCACHE_LOCK
1034         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1035         sb->s_d_op = &ll_d_ops;
1036 #endif
1037
1038         /* Call lprocfs_ll_register_mountpoint() before lustre_process_log()
1039          * so that "llite.*.*" params can be processed correctly. */
1040         if (proc_lustre_fs_root != NULL) {
1041                 err = lprocfs_ll_register_mountpoint(proc_lustre_fs_root, sb);
1042                 if (err < 0) {
1043                         CERROR("%s: could not register mountpoint in llite: "
1044                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
1045                         err = 0;
1046                 }
1047         }
1048
1049         /* Generate a string unique to this super, in case some joker tries
1050            to mount the same fs at two mount points.
1051            Use the address of the super itself.*/
1052         cfg->cfg_instance = sb;
1053         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1054         cfg->cfg_callback = class_config_llog_handler;
1055         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1056         /* set up client obds */
1057         err = lustre_process_log(sb, profilenm, cfg);
1058         if (err < 0)
1059                 GOTO(out_proc, err);
1060
1061         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1062         lprof = class_get_profile(profilenm);
1063         if (lprof == NULL) {
1064                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1065                                    " read from the MGS.  Does that filesystem "
1066                                    "exist?\n", profilenm);
1067                 GOTO(out_proc, err = -EINVAL);
1068         }
1069         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1070                lprof->lp_md, lprof->lp_dt);
1071
1072         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1073         OBD_ALLOC(dt, dt_len);
1074         if (!dt)
1075                 GOTO(out_proc, err = -ENOMEM);
1076         snprintf(dt, dt_len - 1, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1077
1078         md_len = strlen(lprof->lp_md) + instlen + 2;
1079         OBD_ALLOC(md, md_len);
1080         if (!md)
1081                 GOTO(out_proc, err = -ENOMEM);
1082         snprintf(md, md_len - 1, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1083
1084         /* connections, registrations, sb setup */
1085         err = client_common_fill_super(sb, md, dt, mnt);
1086         if (err < 0)
1087                 GOTO(out_proc, err);
1088
1089         sbi->ll_client_common_fill_super_succeeded = 1;
1090
1091 out_proc:
1092         if (err < 0)
1093                 lprocfs_ll_unregister_mountpoint(sbi);
1094 out_free:
1095         if (md)
1096                 OBD_FREE(md, md_len);
1097         if (dt)
1098                 OBD_FREE(dt, dt_len);
1099         if (lprof != NULL)
1100                 class_put_profile(lprof);
1101         if (cfg)
1102                 OBD_FREE_PTR(cfg);
1103         if (err)
1104                 ll_put_super(sb);
1105         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1106                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1107         RETURN(err);
1108 } /* ll_fill_super */
1109
1110 void ll_put_super(struct super_block *sb)
1111 {
1112         struct config_llog_instance cfg, params_cfg;
1113         struct obd_device *obd;
1114         struct lustre_sb_info *lsi = s2lsi(sb);
1115         struct ll_sb_info *sbi = ll_s2sbi(sb);
1116         char *profilenm = get_profile_name(sb);
1117         long ccc_count;
1118         int next, force = 1, rc = 0;
1119         ENTRY;
1120
1121         if (!sbi)
1122                 GOTO(out_no_sbi, 0);
1123
1124         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1125
1126         cfg.cfg_instance = sb;
1127         lustre_end_log(sb, profilenm, &cfg);
1128
1129         params_cfg.cfg_instance = sb;
1130         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1131
1132         if (sbi->ll_md_exp) {
1133                 obd = class_exp2obd(sbi->ll_md_exp);
1134                 if (obd)
1135                         force = obd->obd_force;
1136         }
1137
1138         /* Wait for unstable pages to be committed to stable storage */
1139         if (force == 0) {
1140                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1141                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1142                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1143                         &lwi);
1144         }
1145
1146         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1147         if (force == 0 && rc != -EINTR)
1148                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1149
1150
1151         /* We need to set force before the lov_disconnect in
1152            lustre_common_put_super, since l_d cleans up osc's as well. */
1153         if (force) {
1154                 next = 0;
1155                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1156                                                      &next)) != NULL) {
1157                         obd->obd_force = force;
1158                 }
1159         }
1160
1161         if (sbi->ll_client_common_fill_super_succeeded) {
1162                 /* Only if client_common_fill_super succeeded */
1163                 client_common_put_super(sb);
1164         }
1165
1166         next = 0;
1167         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1168                 class_manual_cleanup(obd);
1169         }
1170
1171         if (sbi->ll_flags & LL_SBI_VERBOSE)
1172                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1173
1174         if (profilenm)
1175                 class_del_profile(profilenm);
1176
1177 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1178         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1179                 bdi_destroy(&lsi->lsi_bdi);
1180                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1181         }
1182 #endif
1183
1184         ll_free_sbi(sb);
1185         lsi->lsi_llsbi = NULL;
1186 out_no_sbi:
1187         lustre_common_put_super(sb);
1188
1189         cl_env_cache_purge(~0);
1190
1191         module_put(THIS_MODULE);
1192
1193         EXIT;
1194 } /* client_put_super */
1195
1196 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1197 {
1198         struct inode *inode = NULL;
1199
1200         /* NOTE: we depend on atomic igrab() -bzzz */
1201         lock_res_and_lock(lock);
1202         if (lock->l_resource->lr_lvb_inode) {
1203                 struct ll_inode_info * lli;
1204                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1205                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1206                         inode = igrab(lock->l_resource->lr_lvb_inode);
1207                 } else {
1208                         inode = lock->l_resource->lr_lvb_inode;
1209                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1210                                          D_WARNING, lock, "lr_lvb_inode %p is "
1211                                          "bogus: magic %08x",
1212                                          lock->l_resource->lr_lvb_inode,
1213                                          lli->lli_inode_magic);
1214                         inode = NULL;
1215                 }
1216         }
1217         unlock_res_and_lock(lock);
1218         return inode;
1219 }
1220
1221 void ll_dir_clear_lsm_md(struct inode *inode)
1222 {
1223         struct ll_inode_info *lli = ll_i2info(inode);
1224
1225         LASSERT(S_ISDIR(inode->i_mode));
1226
1227         if (lli->lli_lsm_md != NULL) {
1228                 lmv_free_memmd(lli->lli_lsm_md);
1229                 lli->lli_lsm_md = NULL;
1230         }
1231 }
1232
1233 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1234                                       const struct lu_fid *fid,
1235                                       struct lustre_md *md)
1236 {
1237         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1238         struct mdt_body         *body = md->body;
1239         struct inode            *inode;
1240         ino_t                   ino;
1241         ENTRY;
1242
1243         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1244         inode = iget_locked(sb, ino);
1245         if (inode == NULL) {
1246                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1247                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1248                 RETURN(ERR_PTR(-ENOENT));
1249         }
1250
1251         if (inode->i_state & I_NEW) {
1252                 struct ll_inode_info *lli = ll_i2info(inode);
1253                 struct lmv_stripe_md *lsm = md->lmv;
1254
1255                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1256                                 (body->mbo_mode & S_IFMT);
1257                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1258                          PFID(fid));
1259
1260                 LTIME_S(inode->i_mtime) = 0;
1261                 LTIME_S(inode->i_atime) = 0;
1262                 LTIME_S(inode->i_ctime) = 0;
1263                 inode->i_rdev = 0;
1264
1265 #ifdef HAVE_BACKING_DEV_INFO
1266                 /* initializing backing dev info. */
1267                 inode->i_mapping->backing_dev_info =
1268                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1269 #endif
1270                 inode->i_op = &ll_dir_inode_operations;
1271                 inode->i_fop = &ll_dir_operations;
1272                 lli->lli_fid = *fid;
1273                 ll_lli_init(lli);
1274
1275                 LASSERT(lsm != NULL);
1276                 /* master object FID */
1277                 lli->lli_pfid = body->mbo_fid1;
1278                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1279                        lli, PFID(fid), PFID(&lli->lli_pfid));
1280                 unlock_new_inode(inode);
1281         }
1282
1283         RETURN(inode);
1284 }
1285
1286 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1287 {
1288         struct lu_fid *fid;
1289         struct lmv_stripe_md *lsm = md->lmv;
1290         int i;
1291
1292         LASSERT(lsm != NULL);
1293         /* XXX sigh, this lsm_root initialization should be in
1294          * LMV layer, but it needs ll_iget right now, so we
1295          * put this here right now. */
1296         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1297                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1298                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1299                 /* Unfortunately ll_iget will call ll_update_inode,
1300                  * where the initialization of slave inode is slightly
1301                  * different, so it reset lsm_md to NULL to avoid
1302                  * initializing lsm for slave inode. */
1303                 /* For migrating inode, master stripe and master object will
1304                  * be same, so we only need assign this inode */
1305                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1306                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1307                 else
1308                         lsm->lsm_md_oinfo[i].lmo_root =
1309                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1310
1311                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1312                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1313
1314                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1315                         return rc;
1316                 }
1317         }
1318
1319         return 0;
1320 }
1321
1322 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1323                                 const struct lmv_stripe_md *lsm_md2)
1324 {
1325         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1326                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1327                lsm_md1->lsm_md_master_mdt_index ==
1328                                         lsm_md2->lsm_md_master_mdt_index &&
1329                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1330                lsm_md1->lsm_md_layout_version ==
1331                                         lsm_md2->lsm_md_layout_version &&
1332                strcmp(lsm_md1->lsm_md_pool_name,
1333                       lsm_md2->lsm_md_pool_name) == 0;
1334 }
1335
1336 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1337 {
1338         struct ll_inode_info *lli = ll_i2info(inode);
1339         struct lmv_stripe_md *lsm = md->lmv;
1340         int     rc;
1341         ENTRY;
1342
1343         LASSERT(S_ISDIR(inode->i_mode));
1344         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1345                PFID(ll_inode2fid(inode)));
1346
1347         /* no striped information from request. */
1348         if (lsm == NULL) {
1349                 if (lli->lli_lsm_md == NULL) {
1350                         RETURN(0);
1351                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1352                                                 LMV_HASH_FLAG_MIGRATION) {
1353                         /* migration is done, the temporay MIGRATE layout has
1354                          * been removed */
1355                         CDEBUG(D_INODE, DFID" finish migration.\n",
1356                                PFID(ll_inode2fid(inode)));
1357                         lmv_free_memmd(lli->lli_lsm_md);
1358                         lli->lli_lsm_md = NULL;
1359                         RETURN(0);
1360                 } else {
1361                         /* The lustre_md from req does not include stripeEA,
1362                          * see ll_md_setattr */
1363                         RETURN(0);
1364                 }
1365         }
1366
1367         /* set the directory layout */
1368         if (lli->lli_lsm_md == NULL) {
1369                 struct cl_attr  *attr;
1370
1371                 rc = ll_init_lsm_md(inode, md);
1372                 if (rc != 0)
1373                         RETURN(rc);
1374
1375                 /* set md->lmv to NULL, so the following free lustre_md
1376                  * will not free this lsm */
1377                 md->lmv = NULL;
1378                 lli->lli_lsm_md = lsm;
1379
1380                 OBD_ALLOC_PTR(attr);
1381                 if (attr == NULL)
1382                         RETURN(-ENOMEM);
1383
1384                 /* validate the lsm */
1385                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1386                                    ll_md_blocking_ast);
1387                 if (rc != 0) {
1388                         OBD_FREE_PTR(attr);
1389                         RETURN(rc);
1390                 }
1391
1392                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1393                         md->body->mbo_nlink = attr->cat_nlink;
1394                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1395                         md->body->mbo_size = attr->cat_size;
1396                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1397                         md->body->mbo_atime = attr->cat_atime;
1398                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1399                         md->body->mbo_ctime = attr->cat_ctime;
1400                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1401                         md->body->mbo_mtime = attr->cat_mtime;
1402
1403                 OBD_FREE_PTR(attr);
1404
1405                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1406                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1407                 RETURN(0);
1408         }
1409
1410         /* Compare the old and new stripe information */
1411         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1412                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1413                 int                     idx;
1414
1415                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1416                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1417                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1418                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1419                        inode, lsm, old_lsm,
1420                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1421                        lsm->lsm_md_stripe_count,
1422                        old_lsm->lsm_md_stripe_count,
1423                        lsm->lsm_md_master_mdt_index,
1424                        old_lsm->lsm_md_master_mdt_index,
1425                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1426                        lsm->lsm_md_layout_version,
1427                        old_lsm->lsm_md_layout_version,
1428                        lsm->lsm_md_pool_name,
1429                        old_lsm->lsm_md_pool_name);
1430
1431                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1432                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1433                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1434                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1435                 }
1436
1437                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1438                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1439                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1440                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1441                 }
1442
1443                 RETURN(-EIO);
1444         }
1445
1446         RETURN(0);
1447 }
1448
1449 void ll_clear_inode(struct inode *inode)
1450 {
1451         struct ll_inode_info *lli = ll_i2info(inode);
1452         struct ll_sb_info *sbi = ll_i2sbi(inode);
1453         ENTRY;
1454
1455         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1456                PFID(ll_inode2fid(inode)), inode);
1457
1458         if (S_ISDIR(inode->i_mode)) {
1459                 /* these should have been cleared in ll_file_release */
1460                 LASSERT(lli->lli_opendir_key == NULL);
1461                 LASSERT(lli->lli_sai == NULL);
1462                 LASSERT(lli->lli_opendir_pid == 0);
1463         }
1464
1465         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1466
1467         LASSERT(!lli->lli_open_fd_write_count);
1468         LASSERT(!lli->lli_open_fd_read_count);
1469         LASSERT(!lli->lli_open_fd_exec_count);
1470
1471         if (lli->lli_mds_write_och)
1472                 ll_md_real_close(inode, FMODE_WRITE);
1473         if (lli->lli_mds_exec_och)
1474                 ll_md_real_close(inode, FMODE_EXEC);
1475         if (lli->lli_mds_read_och)
1476                 ll_md_real_close(inode, FMODE_READ);
1477
1478         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1479                 OBD_FREE(lli->lli_symlink_name,
1480                          strlen(lli->lli_symlink_name) + 1);
1481                 lli->lli_symlink_name = NULL;
1482         }
1483
1484         ll_xattr_cache_destroy(inode);
1485
1486 #ifdef CONFIG_FS_POSIX_ACL
1487         forget_all_cached_acls(inode);
1488         if (lli->lli_posix_acl) {
1489                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1490                 posix_acl_release(lli->lli_posix_acl);
1491                 lli->lli_posix_acl = NULL;
1492         }
1493 #endif
1494         lli->lli_inode_magic = LLI_INODE_DEAD;
1495
1496         if (S_ISDIR(inode->i_mode))
1497                 ll_dir_clear_lsm_md(inode);
1498         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1499                 LASSERT(list_empty(&lli->lli_agl_list));
1500
1501         /*
1502          * XXX This has to be done before lsm is freed below, because
1503          * cl_object still uses inode lsm.
1504          */
1505         cl_inode_fini(inode);
1506
1507         EXIT;
1508 }
1509
1510 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1511 {
1512         struct lustre_md md;
1513         struct inode *inode = dentry->d_inode;
1514         struct ll_sb_info *sbi = ll_i2sbi(inode);
1515         struct ptlrpc_request *request = NULL;
1516         int rc, ia_valid;
1517         ENTRY;
1518
1519         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1520                                      LUSTRE_OPC_ANY, NULL);
1521         if (IS_ERR(op_data))
1522                 RETURN(PTR_ERR(op_data));
1523
1524         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1525         if (rc) {
1526                 ptlrpc_req_finished(request);
1527                 if (rc == -ENOENT) {
1528                         clear_nlink(inode);
1529                         /* Unlinked special device node? Or just a race?
1530                          * Pretend we done everything. */
1531                         if (!S_ISREG(inode->i_mode) &&
1532                             !S_ISDIR(inode->i_mode)) {
1533                                 ia_valid = op_data->op_attr.ia_valid;
1534                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1535                                 rc = simple_setattr(dentry, &op_data->op_attr);
1536                                 op_data->op_attr.ia_valid = ia_valid;
1537                         }
1538                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1539                         CERROR("md_setattr fails: rc = %d\n", rc);
1540                 }
1541                 RETURN(rc);
1542         }
1543
1544         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1545                               sbi->ll_md_exp, &md);
1546         if (rc) {
1547                 ptlrpc_req_finished(request);
1548                 RETURN(rc);
1549         }
1550
1551         ia_valid = op_data->op_attr.ia_valid;
1552         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1553          * cache is not cleared yet. */
1554         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1555         if (S_ISREG(inode->i_mode))
1556                 inode_lock(inode);
1557         rc = simple_setattr(dentry, &op_data->op_attr);
1558         if (S_ISREG(inode->i_mode))
1559                 inode_unlock(inode);
1560         op_data->op_attr.ia_valid = ia_valid;
1561
1562         rc = ll_update_inode(inode, &md);
1563         ptlrpc_req_finished(request);
1564
1565         RETURN(rc);
1566 }
1567
1568 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1569  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1570  * keep these values until such a time that objects are allocated for it.
1571  * We do the MDS operations first, as it is checking permissions for us.
1572  * We don't to the MDS RPC if there is nothing that we want to store there,
1573  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1574  * going to do an RPC anyways.
1575  *
1576  * If we are doing a truncate, we will send the mtime and ctime updates
1577  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1578  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1579  * at the same time.
1580  *
1581  * In case of HSMimport, we only set attr on MDS.
1582  */
1583 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1584 {
1585         struct inode *inode = dentry->d_inode;
1586         struct ll_inode_info *lli = ll_i2info(inode);
1587         struct md_op_data *op_data = NULL;
1588         int rc = 0;
1589         ENTRY;
1590
1591         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1592                "valid %x, hsm_import %d\n",
1593                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1594                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1595                hsm_import);
1596
1597         if (attr->ia_valid & ATTR_SIZE) {
1598                 /* Check new size against VFS/VM file size limit and rlimit */
1599                 rc = inode_newsize_ok(inode, attr->ia_size);
1600                 if (rc)
1601                         RETURN(rc);
1602
1603                 /* The maximum Lustre file size is variable, based on the
1604                  * OST maximum object size and number of stripes.  This
1605                  * needs another check in addition to the VFS check above. */
1606                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1607                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1608                                PFID(&lli->lli_fid), attr->ia_size,
1609                                ll_file_maxbytes(inode));
1610                         RETURN(-EFBIG);
1611                 }
1612
1613                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1614         }
1615
1616         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1617         if (attr->ia_valid & TIMES_SET_FLAGS) {
1618                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1619                     !cfs_capable(CFS_CAP_FOWNER))
1620                         RETURN(-EPERM);
1621         }
1622
1623         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1624         if (!(attr->ia_valid & ATTR_CTIME_SET) &&
1625             (attr->ia_valid & ATTR_CTIME)) {
1626                 attr->ia_ctime = current_time(inode);
1627                 attr->ia_valid |= ATTR_CTIME_SET;
1628         }
1629         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1630             (attr->ia_valid & ATTR_ATIME)) {
1631                 attr->ia_atime = current_time(inode);
1632                 attr->ia_valid |= ATTR_ATIME_SET;
1633         }
1634         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1635             (attr->ia_valid & ATTR_MTIME)) {
1636                 attr->ia_mtime = current_time(inode);
1637                 attr->ia_valid |= ATTR_MTIME_SET;
1638         }
1639
1640         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1641                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1642                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1643                        (s64)ktime_get_real_seconds());
1644
1645         if (S_ISREG(inode->i_mode)) {
1646                 if (attr->ia_valid & ATTR_SIZE)
1647                         inode_dio_write_done(inode);
1648                 inode_unlock(inode);
1649         }
1650
1651         /* We always do an MDS RPC, even if we're only changing the size;
1652          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1653
1654         OBD_ALLOC_PTR(op_data);
1655         if (op_data == NULL)
1656                 GOTO(out, rc = -ENOMEM);
1657
1658         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1659                 /* If we are changing file size, file content is
1660                  * modified, flag it. */
1661                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1662                 op_data->op_bias |= MDS_DATA_MODIFIED;
1663                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1664         }
1665
1666         op_data->op_attr = *attr;
1667
1668         rc = ll_md_setattr(dentry, op_data);
1669         if (rc)
1670                 GOTO(out, rc);
1671
1672         if (!S_ISREG(inode->i_mode) || hsm_import)
1673                 GOTO(out, rc = 0);
1674
1675         if (attr->ia_valid & (ATTR_SIZE |
1676                               ATTR_ATIME | ATTR_ATIME_SET |
1677                               ATTR_MTIME | ATTR_MTIME_SET |
1678                               ATTR_CTIME | ATTR_CTIME_SET)) {
1679                 /* For truncate and utimes sending attributes to OSTs, setting
1680                  * mtime/atime to the past will be performed under PW [0:EOF]
1681                  * extent lock (new_size:EOF for truncate).  It may seem
1682                  * excessive to send mtime/atime updates to OSTs when not
1683                  * setting times to past, but it is necessary due to possible
1684                  * time de-synchronization between MDT inode and OST objects */
1685                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1686         }
1687
1688         /* If the file was restored, it needs to set dirty flag.
1689          *
1690          * We've already sent MDS_DATA_MODIFIED flag in
1691          * ll_md_setattr() for truncate. However, the MDT refuses to
1692          * set the HS_DIRTY flag on released files, so we have to set
1693          * it again if the file has been restored. Please check how
1694          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1695          *
1696          * Please notice that if the file is not released, the previous
1697          * MDS_DATA_MODIFIED has taken effect and usually
1698          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1699          * This way we can save an RPC for common open + trunc
1700          * operation. */
1701         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1702                 struct hsm_state_set hss = {
1703                         .hss_valid = HSS_SETMASK,
1704                         .hss_setmask = HS_DIRTY,
1705                 };
1706                 int rc2;
1707
1708                 rc2 = ll_hsm_state_set(inode, &hss);
1709                 /* truncate and write can happen at the same time, so that
1710                  * the file can be set modified even though the file is not
1711                  * restored from released state, and ll_hsm_state_set() is
1712                  * not applicable for the file, and rc2 < 0 is normal in this
1713                  * case. */
1714                 if (rc2 < 0)
1715                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1716                                PFID(ll_inode2fid(inode)), rc2);
1717         }
1718
1719         EXIT;
1720 out:
1721         if (op_data != NULL)
1722                 ll_finish_md_op_data(op_data);
1723
1724         if (S_ISREG(inode->i_mode)) {
1725                 inode_lock(inode);
1726                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1727                         inode_dio_wait(inode);
1728                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1729                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1730                  * inode flags, so there is a gap where S_NOSEC is not set.
1731                  * This can cause a writer to take the i_mutex unnecessarily,
1732                  * but this is safe to do and should be rare. */
1733                 inode_has_no_xattr(inode);
1734         }
1735
1736         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1737                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1738
1739         return rc;
1740 }
1741
1742 int ll_setattr(struct dentry *de, struct iattr *attr)
1743 {
1744         int mode = de->d_inode->i_mode;
1745
1746         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1747                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1748                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1749
1750         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1751                                (ATTR_SIZE|ATTR_MODE)) &&
1752             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1753              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1754               !(attr->ia_mode & S_ISGID))))
1755                 attr->ia_valid |= ATTR_FORCE;
1756
1757         if ((attr->ia_valid & ATTR_MODE) &&
1758             (mode & S_ISUID) &&
1759             !(attr->ia_mode & S_ISUID) &&
1760             !(attr->ia_valid & ATTR_KILL_SUID))
1761                 attr->ia_valid |= ATTR_KILL_SUID;
1762
1763         if ((attr->ia_valid & ATTR_MODE) &&
1764             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1765             !(attr->ia_mode & S_ISGID) &&
1766             !(attr->ia_valid & ATTR_KILL_SGID))
1767                 attr->ia_valid |= ATTR_KILL_SGID;
1768
1769         /* avoid polluted from ATTR_TIMES_SET,
1770          * projid is not expected to be set here */
1771         attr->ia_valid &= ~MDS_ATTR_PROJID;
1772
1773         return ll_setattr_raw(de, attr, false);
1774 }
1775
1776 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1777                        u32 flags)
1778 {
1779         struct ll_sb_info *sbi = ll_s2sbi(sb);
1780         struct obd_statfs obd_osfs;
1781         time64_t max_age;
1782         int rc;
1783
1784         ENTRY;
1785         max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
1786
1787         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1788         if (rc) {
1789                 CERROR("md_statfs fails: rc = %d\n", rc);
1790                 RETURN(rc);
1791         }
1792
1793         osfs->os_type = sb->s_magic;
1794
1795         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1796                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1797
1798         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1799                 flags |= OBD_STATFS_NODELAY;
1800
1801         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1802         if (rc) {
1803                 CERROR("obd_statfs fails: rc = %d\n", rc);
1804                 RETURN(rc);
1805         }
1806
1807         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1808                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1809                obd_osfs.os_files);
1810
1811         osfs->os_bsize = obd_osfs.os_bsize;
1812         osfs->os_blocks = obd_osfs.os_blocks;
1813         osfs->os_bfree = obd_osfs.os_bfree;
1814         osfs->os_bavail = obd_osfs.os_bavail;
1815
1816         /* If we don't have as many objects free on the OST as inodes
1817          * on the MDS, we reduce the total number of inodes to
1818          * compensate, so that the "inodes in use" number is correct.
1819          */
1820         if (obd_osfs.os_ffree < osfs->os_ffree) {
1821                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1822                         obd_osfs.os_ffree;
1823                 osfs->os_ffree = obd_osfs.os_ffree;
1824         }
1825
1826         RETURN(rc);
1827 }
1828 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1829 {
1830         struct super_block *sb = de->d_sb;
1831         struct obd_statfs osfs;
1832         __u64 fsid = huge_encode_dev(sb->s_dev);
1833         int rc;
1834
1835         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1836         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1837
1838         /* Some amount of caching on the client is allowed */
1839         rc = ll_statfs_internal(sb, &osfs, 0);
1840         if (rc)
1841                 return rc;
1842
1843         statfs_unpack(sfs, &osfs);
1844
1845         /* We need to downshift for all 32-bit kernels, because we can't
1846          * tell if the kernel is being called via sys_statfs64() or not.
1847          * Stop before overflowing f_bsize - in which case it is better
1848          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1849         if (sizeof(long) < 8) {
1850                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1851                         sfs->f_bsize <<= 1;
1852
1853                         osfs.os_blocks >>= 1;
1854                         osfs.os_bfree >>= 1;
1855                         osfs.os_bavail >>= 1;
1856                 }
1857         }
1858
1859         sfs->f_blocks = osfs.os_blocks;
1860         sfs->f_bfree = osfs.os_bfree;
1861         sfs->f_bavail = osfs.os_bavail;
1862         sfs->f_fsid.val[0] = (__u32)fsid;
1863         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1864         return 0;
1865 }
1866
1867 void ll_inode_size_lock(struct inode *inode)
1868 {
1869         struct ll_inode_info *lli;
1870
1871         LASSERT(!S_ISDIR(inode->i_mode));
1872
1873         lli = ll_i2info(inode);
1874         mutex_lock(&lli->lli_size_mutex);
1875 }
1876
1877 void ll_inode_size_unlock(struct inode *inode)
1878 {
1879         struct ll_inode_info *lli;
1880
1881         lli = ll_i2info(inode);
1882         mutex_unlock(&lli->lli_size_mutex);
1883 }
1884
1885 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1886 {
1887         struct ll_inode_info *lli = ll_i2info(inode);
1888         struct mdt_body *body = md->body;
1889         struct ll_sb_info *sbi = ll_i2sbi(inode);
1890         int rc = 0;
1891
1892         if (body->mbo_valid & OBD_MD_FLEASIZE) {
1893                 rc = cl_file_inode_init(inode, md);
1894                 if (rc)
1895                         return rc;
1896         }
1897
1898         if (S_ISDIR(inode->i_mode)) {
1899                 rc = ll_update_lsm_md(inode, md);
1900                 if (rc != 0)
1901                         return rc;
1902         }
1903
1904 #ifdef CONFIG_FS_POSIX_ACL
1905         if (body->mbo_valid & OBD_MD_FLACL) {
1906                 spin_lock(&lli->lli_lock);
1907                 if (lli->lli_posix_acl)
1908                         posix_acl_release(lli->lli_posix_acl);
1909                 lli->lli_posix_acl = md->posix_acl;
1910                 spin_unlock(&lli->lli_lock);
1911         }
1912 #endif
1913         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1914                                         sbi->ll_flags & LL_SBI_32BIT_API);
1915         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1916
1917         if (body->mbo_valid & OBD_MD_FLATIME) {
1918                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1919                         LTIME_S(inode->i_atime) = body->mbo_atime;
1920                 lli->lli_atime = body->mbo_atime;
1921         }
1922
1923         if (body->mbo_valid & OBD_MD_FLMTIME) {
1924                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1925                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1926                                "to %llu\n", inode->i_ino,
1927                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1928                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1929                 }
1930                 lli->lli_mtime = body->mbo_mtime;
1931         }
1932
1933         if (body->mbo_valid & OBD_MD_FLCTIME) {
1934                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1935                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1936                 lli->lli_ctime = body->mbo_ctime;
1937         }
1938
1939         /* Clear i_flags to remove S_NOSEC before permissions are updated */
1940         if (body->mbo_valid & OBD_MD_FLFLAGS)
1941                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1942         if (body->mbo_valid & OBD_MD_FLMODE)
1943                 inode->i_mode = (inode->i_mode & S_IFMT) |
1944                                 (body->mbo_mode & ~S_IFMT);
1945
1946         if (body->mbo_valid & OBD_MD_FLTYPE)
1947                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1948                                 (body->mbo_mode & S_IFMT);
1949
1950         LASSERT(inode->i_mode != 0);
1951         if (S_ISREG(inode->i_mode))
1952                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1953                                        LL_MAX_BLKSIZE_BITS);
1954         else
1955                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1956
1957         if (body->mbo_valid & OBD_MD_FLUID)
1958                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1959         if (body->mbo_valid & OBD_MD_FLGID)
1960                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1961         if (body->mbo_valid & OBD_MD_FLPROJID)
1962                 lli->lli_projid = body->mbo_projid;
1963         if (body->mbo_valid & OBD_MD_FLNLINK)
1964                 set_nlink(inode, body->mbo_nlink);
1965         if (body->mbo_valid & OBD_MD_FLRDEV)
1966                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1967
1968         if (body->mbo_valid & OBD_MD_FLID) {
1969                 /* FID shouldn't be changed! */
1970                 if (fid_is_sane(&lli->lli_fid)) {
1971                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1972                                  "Trying to change FID "DFID
1973                                  " to the "DFID", inode "DFID"(%p)\n",
1974                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1975                                  PFID(ll_inode2fid(inode)), inode);
1976                 } else {
1977                         lli->lli_fid = body->mbo_fid1;
1978                 }
1979         }
1980
1981         LASSERT(fid_seq(&lli->lli_fid) != 0);
1982
1983         if (body->mbo_valid & OBD_MD_FLSIZE) {
1984                 i_size_write(inode, body->mbo_size);
1985
1986                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1987                        PFID(ll_inode2fid(inode)),
1988                        (unsigned long long)body->mbo_size);
1989
1990                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1991                         inode->i_blocks = body->mbo_blocks;
1992         }
1993
1994         if (body->mbo_valid & OBD_MD_TSTATE) {
1995                 /* Set LLIF_FILE_RESTORING if restore ongoing and
1996                  * clear it when done to ensure to start again
1997                  * glimpsing updated attrs
1998                  */
1999                 if (body->mbo_t_state & MS_RESTORE)
2000                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2001                 else
2002                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2003         }
2004
2005         return 0;
2006 }
2007
2008 int ll_read_inode2(struct inode *inode, void *opaque)
2009 {
2010         struct lustre_md *md = opaque;
2011         struct ll_inode_info *lli = ll_i2info(inode);
2012         int     rc;
2013         ENTRY;
2014
2015         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2016                PFID(&lli->lli_fid), inode);
2017
2018         /* Core attributes from the MDS first.  This is a new inode, and
2019          * the VFS doesn't zero times in the core inode so we have to do
2020          * it ourselves.  They will be overwritten by either MDS or OST
2021          * attributes - we just need to make sure they aren't newer. */
2022         LTIME_S(inode->i_mtime) = 0;
2023         LTIME_S(inode->i_atime) = 0;
2024         LTIME_S(inode->i_ctime) = 0;
2025         inode->i_rdev = 0;
2026         rc = ll_update_inode(inode, md);
2027         if (rc != 0)
2028                 RETURN(rc);
2029
2030         /* OIDEBUG(inode); */
2031
2032 #ifdef HAVE_BACKING_DEV_INFO
2033         /* initializing backing dev info. */
2034         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2035 #endif
2036         if (S_ISREG(inode->i_mode)) {
2037                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2038                 inode->i_op = &ll_file_inode_operations;
2039                 inode->i_fop = sbi->ll_fop;
2040                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2041                 EXIT;
2042         } else if (S_ISDIR(inode->i_mode)) {
2043                 inode->i_op = &ll_dir_inode_operations;
2044                 inode->i_fop = &ll_dir_operations;
2045                 EXIT;
2046         } else if (S_ISLNK(inode->i_mode)) {
2047                 inode->i_op = &ll_fast_symlink_inode_operations;
2048                 EXIT;
2049         } else {
2050                 inode->i_op = &ll_special_inode_operations;
2051
2052                 init_special_inode(inode, inode->i_mode,
2053                                    inode->i_rdev);
2054
2055                 EXIT;
2056         }
2057
2058         return 0;
2059 }
2060
2061 void ll_delete_inode(struct inode *inode)
2062 {
2063         struct ll_inode_info *lli = ll_i2info(inode);
2064         ENTRY;
2065
2066         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2067                 /* It is last chance to write out dirty pages,
2068                  * otherwise we may lose data while umount */
2069                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2070
2071         truncate_inode_pages_final(&inode->i_data);
2072
2073         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2074                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2075                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2076
2077 #ifdef HAVE_SBOPS_EVICT_INODE
2078         ll_clear_inode(inode);
2079 #endif
2080         clear_inode(inode);
2081
2082         EXIT;
2083 }
2084
2085 int ll_iocontrol(struct inode *inode, struct file *file,
2086                  unsigned int cmd, unsigned long arg)
2087 {
2088         struct ll_sb_info *sbi = ll_i2sbi(inode);
2089         struct ptlrpc_request *req = NULL;
2090         int rc, flags = 0;
2091         ENTRY;
2092
2093         switch(cmd) {
2094         case FSFILT_IOC_GETFLAGS: {
2095                 struct mdt_body *body;
2096                 struct md_op_data *op_data;
2097
2098                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2099                                              0, 0, LUSTRE_OPC_ANY,
2100                                              NULL);
2101                 if (IS_ERR(op_data))
2102                         RETURN(PTR_ERR(op_data));
2103
2104                 op_data->op_valid = OBD_MD_FLFLAGS;
2105                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2106                 ll_finish_md_op_data(op_data);
2107                 if (rc) {
2108                         CERROR("%s: failure inode "DFID": rc = %d\n",
2109                                sbi->ll_md_exp->exp_obd->obd_name,
2110                                PFID(ll_inode2fid(inode)), rc);
2111                         RETURN(-abs(rc));
2112                 }
2113
2114                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2115
2116                 flags = body->mbo_flags;
2117
2118                 ptlrpc_req_finished(req);
2119
2120                 RETURN(put_user(flags, (int __user *)arg));
2121         }
2122         case FSFILT_IOC_SETFLAGS: {
2123                 struct iattr *attr;
2124                 struct md_op_data *op_data;
2125                 struct cl_object *obj;
2126
2127                 if (get_user(flags, (int __user *)arg))
2128                         RETURN(-EFAULT);
2129
2130                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2131                                              LUSTRE_OPC_ANY, NULL);
2132                 if (IS_ERR(op_data))
2133                         RETURN(PTR_ERR(op_data));
2134
2135                 op_data->op_attr_flags = flags;
2136                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2137                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2138                 ll_finish_md_op_data(op_data);
2139                 ptlrpc_req_finished(req);
2140                 if (rc)
2141                         RETURN(rc);
2142
2143                 inode->i_flags = ll_ext_to_inode_flags(flags);
2144
2145                 obj = ll_i2info(inode)->lli_clob;
2146                 if (obj == NULL)
2147                         RETURN(0);
2148
2149                 OBD_ALLOC_PTR(attr);
2150                 if (attr == NULL)
2151                         RETURN(-ENOMEM);
2152
2153                 attr->ia_valid = ATTR_ATTR_FLAG;
2154                 rc = cl_setattr_ost(obj, attr, flags);
2155
2156                 OBD_FREE_PTR(attr);
2157                 RETURN(rc);
2158         }
2159         default:
2160                 RETURN(-ENOSYS);
2161         }
2162
2163         RETURN(0);
2164 }
2165
2166 int ll_flush_ctx(struct inode *inode)
2167 {
2168         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2169
2170         CDEBUG(D_SEC, "flush context for user %d\n",
2171                from_kuid(&init_user_ns, current_uid()));
2172
2173         obd_set_info_async(NULL, sbi->ll_md_exp,
2174                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2175                            0, NULL, NULL);
2176         obd_set_info_async(NULL, sbi->ll_dt_exp,
2177                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2178                            0, NULL, NULL);
2179         return 0;
2180 }
2181
2182 /* umount -f client means force down, don't save state */
2183 void ll_umount_begin(struct super_block *sb)
2184 {
2185         struct ll_sb_info *sbi = ll_s2sbi(sb);
2186         struct obd_device *obd;
2187         struct obd_ioctl_data *ioc_data;
2188         struct l_wait_info lwi;
2189         wait_queue_head_t waitq;
2190         ENTRY;
2191
2192         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2193                sb->s_count, atomic_read(&sb->s_active));
2194
2195         obd = class_exp2obd(sbi->ll_md_exp);
2196         if (obd == NULL) {
2197                 CERROR("Invalid MDC connection handle %#llx\n",
2198                        sbi->ll_md_exp->exp_handle.h_cookie);
2199                 EXIT;
2200                 return;
2201         }
2202         obd->obd_force = 1;
2203
2204         obd = class_exp2obd(sbi->ll_dt_exp);
2205         if (obd == NULL) {
2206                 CERROR("Invalid LOV connection handle %#llx\n",
2207                        sbi->ll_dt_exp->exp_handle.h_cookie);
2208                 EXIT;
2209                 return;
2210         }
2211         obd->obd_force = 1;
2212
2213         OBD_ALLOC_PTR(ioc_data);
2214         if (ioc_data) {
2215                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2216                               sizeof *ioc_data, ioc_data, NULL);
2217
2218                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2219                               sizeof *ioc_data, ioc_data, NULL);
2220
2221                 OBD_FREE_PTR(ioc_data);
2222         }
2223
2224         /* Really, we'd like to wait until there are no requests outstanding,
2225          * and then continue.  For now, we just periodically checking for vfs
2226          * to decrement mnt_cnt and hope to finish it within 10sec.
2227          */
2228         init_waitqueue_head(&waitq);
2229         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(10),
2230                                    cfs_time_seconds(1), NULL, NULL);
2231         l_wait_event(waitq, may_umount(sbi->ll_mnt.mnt), &lwi);
2232
2233         EXIT;
2234 }
2235
2236 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2237 {
2238         struct ll_sb_info *sbi = ll_s2sbi(sb);
2239         char *profilenm = get_profile_name(sb);
2240         int err;
2241         __u32 read_only;
2242
2243         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2244                 read_only = *flags & MS_RDONLY;
2245                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2246                                          sizeof(KEY_READ_ONLY),
2247                                          KEY_READ_ONLY, sizeof(read_only),
2248                                          &read_only, NULL);
2249                 if (err) {
2250                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2251                                       profilenm, read_only ?
2252                                       "read-only" : "read-write", err);
2253                         return err;
2254                 }
2255
2256                 if (read_only)
2257                         sb->s_flags |= MS_RDONLY;
2258                 else
2259                         sb->s_flags &= ~MS_RDONLY;
2260
2261                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2262                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2263                                       read_only ?  "read-only" : "read-write");
2264         }
2265         return 0;
2266 }
2267
2268 /**
2269  * Cleanup the open handle that is cached on MDT-side.
2270  *
2271  * For open case, the client side open handling thread may hit error
2272  * after the MDT grant the open. Under such case, the client should
2273  * send close RPC to the MDT as cleanup; otherwise, the open handle
2274  * on the MDT will be leaked there until the client umount or evicted.
2275  *
2276  * In further, if someone unlinked the file, because the open handle
2277  * holds the reference on such file/object, then it will block the
2278  * subsequent threads that want to locate such object via FID.
2279  *
2280  * \param[in] sb        super block for this file-system
2281  * \param[in] open_req  pointer to the original open request
2282  */
2283 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2284 {
2285         struct mdt_body                 *body;
2286         struct md_op_data               *op_data;
2287         struct ptlrpc_request           *close_req = NULL;
2288         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2289         ENTRY;
2290
2291         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2292         OBD_ALLOC_PTR(op_data);
2293         if (op_data == NULL) {
2294                 CWARN("%s: cannot allocate op_data to release open handle for "
2295                       DFID"\n",
2296                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2297
2298                 RETURN_EXIT;
2299         }
2300
2301         op_data->op_fid1 = body->mbo_fid1;
2302         op_data->op_handle = body->mbo_handle;
2303         op_data->op_mod_time = ktime_get_real_seconds();
2304         md_close(exp, op_data, NULL, &close_req);
2305         ptlrpc_req_finished(close_req);
2306         ll_finish_md_op_data(op_data);
2307
2308         EXIT;
2309 }
2310
2311 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2312                   struct super_block *sb, struct lookup_intent *it)
2313 {
2314         struct ll_sb_info *sbi = NULL;
2315         struct lustre_md md = { NULL };
2316         int rc;
2317         ENTRY;
2318
2319         LASSERT(*inode || sb);
2320         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2321         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2322                               sbi->ll_md_exp, &md);
2323         if (rc != 0)
2324                 GOTO(cleanup, rc);
2325
2326         if (*inode) {
2327                 rc = ll_update_inode(*inode, &md);
2328                 if (rc != 0)
2329                         GOTO(out, rc);
2330         } else {
2331                 LASSERT(sb != NULL);
2332
2333                 /*
2334                  * At this point server returns to client's same fid as client
2335                  * generated for creating. So using ->fid1 is okay here.
2336                  */
2337                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2338                         CERROR("%s: Fid is insane "DFID"\n",
2339                                 ll_get_fsname(sb, NULL, 0),
2340                                 PFID(&md.body->mbo_fid1));
2341                         GOTO(out, rc = -EINVAL);
2342                 }
2343
2344                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2345                                              sbi->ll_flags & LL_SBI_32BIT_API),
2346                                  &md);
2347                 if (IS_ERR(*inode)) {
2348 #ifdef CONFIG_FS_POSIX_ACL
2349                         if (md.posix_acl) {
2350                                 posix_acl_release(md.posix_acl);
2351                                 md.posix_acl = NULL;
2352                         }
2353 #endif
2354                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2355                         *inode = NULL;
2356                         CERROR("new_inode -fatal: rc %d\n", rc);
2357                         GOTO(out, rc);
2358                 }
2359         }
2360
2361         /* Handling piggyback layout lock.
2362          * Layout lock can be piggybacked by getattr and open request.
2363          * The lsm can be applied to inode only if it comes with a layout lock
2364          * otherwise correct layout may be overwritten, for example:
2365          * 1. proc1: mdt returns a lsm but not granting layout
2366          * 2. layout was changed by another client
2367          * 3. proc2: refresh layout and layout lock granted
2368          * 4. proc1: to apply a stale layout */
2369         if (it != NULL && it->it_lock_mode != 0) {
2370                 struct lustre_handle lockh;
2371                 struct ldlm_lock *lock;
2372
2373                 lockh.cookie = it->it_lock_handle;
2374                 lock = ldlm_handle2lock(&lockh);
2375                 LASSERT(lock != NULL);
2376                 if (ldlm_has_layout(lock)) {
2377                         struct cl_object_conf conf;
2378
2379                         memset(&conf, 0, sizeof(conf));
2380                         conf.coc_opc = OBJECT_CONF_SET;
2381                         conf.coc_inode = *inode;
2382                         conf.coc_lock = lock;
2383                         conf.u.coc_layout = md.layout;
2384                         (void)ll_layout_conf(*inode, &conf);
2385                 }
2386                 LDLM_LOCK_PUT(lock);
2387         }
2388
2389         GOTO(out, rc = 0);
2390
2391 out:
2392         md_free_lustre_md(sbi->ll_md_exp, &md);
2393
2394 cleanup:
2395         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2396                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2397
2398         return rc;
2399 }
2400
2401 int ll_obd_statfs(struct inode *inode, void __user *arg)
2402 {
2403         struct ll_sb_info *sbi = NULL;
2404         struct obd_export *exp;
2405         char *buf = NULL;
2406         struct obd_ioctl_data *data = NULL;
2407         __u32 type;
2408         int len = 0, rc;
2409
2410         if (!inode || !(sbi = ll_i2sbi(inode)))
2411                 GOTO(out_statfs, rc = -EINVAL);
2412
2413         rc = obd_ioctl_getdata(&buf, &len, arg);
2414         if (rc)
2415                 GOTO(out_statfs, rc);
2416
2417         data = (void*)buf;
2418         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2419             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2420                 GOTO(out_statfs, rc = -EINVAL);
2421
2422         if (data->ioc_inllen1 != sizeof(__u32) ||
2423             data->ioc_inllen2 != sizeof(__u32) ||
2424             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2425             data->ioc_plen2 != sizeof(struct obd_uuid))
2426                 GOTO(out_statfs, rc = -EINVAL);
2427
2428         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2429         if (type & LL_STATFS_LMV)
2430                 exp = sbi->ll_md_exp;
2431         else if (type & LL_STATFS_LOV)
2432                 exp = sbi->ll_dt_exp;
2433         else
2434                 GOTO(out_statfs, rc = -ENODEV);
2435
2436         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2437         if (rc)
2438                 GOTO(out_statfs, rc);
2439 out_statfs:
2440         OBD_FREE_LARGE(buf, len);
2441         return rc;
2442 }
2443
2444 int ll_process_config(struct lustre_cfg *lcfg)
2445 {
2446         struct super_block *sb;
2447         unsigned long x;
2448         int rc = 0;
2449         char *ptr;
2450
2451         /* The instance name contains the sb: lustre-client-aacfe000 */
2452         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2453         if (!ptr || !*(++ptr))
2454                 return -EINVAL;
2455         if (sscanf(ptr, "%lx", &x) != 1)
2456                 return -EINVAL;
2457         sb = (struct super_block *)x;
2458         /* This better be a real Lustre superblock! */
2459         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2460
2461         /* Note we have not called client_common_fill_super yet, so
2462            proc fns must be able to handle that! */
2463         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2464                                       lcfg, sb);
2465         if (rc > 0)
2466                 rc = 0;
2467         return rc;
2468 }
2469
2470 /* this function prepares md_op_data hint for passing it down to MD stack. */
2471 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2472                                       struct inode *i1, struct inode *i2,
2473                                       const char *name, size_t namelen,
2474                                       __u32 mode, __u32 opc, void *data)
2475 {
2476         LASSERT(i1 != NULL);
2477
2478         if (name == NULL) {
2479                 /* Do not reuse namelen for something else. */
2480                 if (namelen != 0)
2481                         return ERR_PTR(-EINVAL);
2482         } else {
2483                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2484                         return ERR_PTR(-ENAMETOOLONG);
2485
2486                 if (!lu_name_is_valid_2(name, namelen))
2487                         return ERR_PTR(-EINVAL);
2488         }
2489
2490         if (op_data == NULL)
2491                 OBD_ALLOC_PTR(op_data);
2492
2493         if (op_data == NULL)
2494                 return ERR_PTR(-ENOMEM);
2495
2496         ll_i2gids(op_data->op_suppgids, i1, i2);
2497         op_data->op_fid1 = *ll_inode2fid(i1);
2498         op_data->op_default_stripe_offset = -1;
2499         if (S_ISDIR(i1->i_mode)) {
2500                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2501                 if (opc == LUSTRE_OPC_MKDIR)
2502                         op_data->op_default_stripe_offset =
2503                                    ll_i2info(i1)->lli_def_stripe_offset;
2504         }
2505
2506         if (i2) {
2507                 op_data->op_fid2 = *ll_inode2fid(i2);
2508                 if (S_ISDIR(i2->i_mode))
2509                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2510         } else {
2511                 fid_zero(&op_data->op_fid2);
2512         }
2513
2514         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2515                 op_data->op_cli_flags |= CLI_HASH64;
2516
2517         if (ll_need_32bit_api(ll_i2sbi(i1)))
2518                 op_data->op_cli_flags |= CLI_API32;
2519
2520         op_data->op_name = name;
2521         op_data->op_namelen = namelen;
2522         op_data->op_mode = mode;
2523         op_data->op_mod_time = ktime_get_real_seconds();
2524         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2525         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2526         op_data->op_cap = cfs_curproc_cap_pack();
2527         op_data->op_mds = 0;
2528         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2529              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2530                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2531         }
2532         op_data->op_data = data;
2533
2534         return op_data;
2535 }
2536
2537 void ll_finish_md_op_data(struct md_op_data *op_data)
2538 {
2539         security_release_secctx(op_data->op_file_secctx,
2540                                 op_data->op_file_secctx_size);
2541         OBD_FREE_PTR(op_data);
2542 }
2543
2544 #ifdef HAVE_SUPEROPS_USE_DENTRY
2545 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2546 #else
2547 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2548 #endif
2549 {
2550         struct ll_sb_info *sbi;
2551
2552 #ifdef HAVE_SUPEROPS_USE_DENTRY
2553         LASSERT((seq != NULL) && (dentry != NULL));
2554         sbi = ll_s2sbi(dentry->d_sb);
2555 #else
2556         LASSERT((seq != NULL) && (vfs != NULL));
2557         sbi = ll_s2sbi(vfs->mnt_sb);
2558 #endif
2559
2560         if (sbi->ll_flags & LL_SBI_NOLCK)
2561                 seq_puts(seq, ",nolock");
2562
2563         if (sbi->ll_flags & LL_SBI_FLOCK)
2564                 seq_puts(seq, ",flock");
2565
2566         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2567                 seq_puts(seq, ",localflock");
2568
2569         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2570                 seq_puts(seq, ",user_xattr");
2571
2572         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2573                 seq_puts(seq, ",lazystatfs");
2574
2575         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2576                 seq_puts(seq, ",user_fid2path");
2577
2578         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2579                 seq_puts(seq, ",always_ping");
2580
2581         RETURN(0);
2582 }
2583
2584 /**
2585  * Get obd name by cmd, and copy out to user space
2586  */
2587 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2588 {
2589         struct ll_sb_info *sbi = ll_i2sbi(inode);
2590         struct obd_device *obd;
2591         ENTRY;
2592
2593         if (cmd == OBD_IOC_GETDTNAME)
2594                 obd = class_exp2obd(sbi->ll_dt_exp);
2595         else if (cmd == OBD_IOC_GETMDNAME)
2596                 obd = class_exp2obd(sbi->ll_md_exp);
2597         else
2598                 RETURN(-EINVAL);
2599
2600         if (!obd)
2601                 RETURN(-ENOENT);
2602
2603         if (copy_to_user((void __user *)arg, obd->obd_name,
2604                          strlen(obd->obd_name) + 1))
2605                 RETURN(-EFAULT);
2606
2607         RETURN(0);
2608 }
2609
2610 /**
2611  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2612  * fsname will be returned in this buffer; otherwise, a static buffer will be
2613  * used to store the fsname and returned to caller.
2614  */
2615 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2616 {
2617         static char fsname_static[MTI_NAME_MAXLEN];
2618         struct lustre_sb_info *lsi = s2lsi(sb);
2619         char *ptr;
2620         int len;
2621
2622         if (buf == NULL) {
2623                 /* this means the caller wants to use static buffer
2624                  * and it doesn't care about race. Usually this is
2625                  * in error reporting path */
2626                 buf = fsname_static;
2627                 buflen = sizeof(fsname_static);
2628         }
2629
2630         len = strlen(lsi->lsi_lmd->lmd_profile);
2631         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2632         if (ptr && (strcmp(ptr, "-client") == 0))
2633                 len -= 7;
2634
2635         if (unlikely(len >= buflen))
2636                 len = buflen - 1;
2637         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2638         buf[len] = '\0';
2639
2640         return buf;
2641 }
2642
2643 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2644 {
2645         char *path = NULL;
2646
2647         struct path p;
2648
2649         p.dentry = dentry;
2650         p.mnt = current->fs->root.mnt;
2651         path_get(&p);
2652         path = d_path(&p, buf, bufsize);
2653         path_put(&p);
2654         return path;
2655 }
2656
2657 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2658 {
2659         char *buf, *path = NULL;
2660         struct dentry *dentry = NULL;
2661         struct inode *inode = page->mapping->host;
2662
2663         /* this can be called inside spin lock so use GFP_ATOMIC. */
2664         buf = (char *)__get_free_page(GFP_ATOMIC);
2665         if (buf != NULL) {
2666                 dentry = d_find_alias(page->mapping->host);
2667                 if (dentry != NULL)
2668                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2669         }
2670
2671         CDEBUG(D_WARNING,
2672                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2673                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2674                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2675                PFID(ll_inode2fid(inode)),
2676                (path && !IS_ERR(path)) ? path : "", ioret);
2677
2678         if (dentry != NULL)
2679                 dput(dentry);
2680
2681         if (buf != NULL)
2682                 free_page((unsigned long)buf);
2683 }
2684
2685 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2686                         struct lov_user_md **kbuf)
2687 {
2688         struct lov_user_md      lum;
2689         ssize_t                 lum_size;
2690         ENTRY;
2691
2692         if (copy_from_user(&lum, md, sizeof(lum)))
2693                 RETURN(-EFAULT);
2694
2695         lum_size = ll_lov_user_md_size(&lum);
2696         if (lum_size < 0)
2697                 RETURN(lum_size);
2698
2699         OBD_ALLOC(*kbuf, lum_size);
2700         if (*kbuf == NULL)
2701                 RETURN(-ENOMEM);
2702
2703         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2704                 OBD_FREE(*kbuf, lum_size);
2705                 RETURN(-EFAULT);
2706         }
2707
2708         RETURN(lum_size);
2709 }
2710
2711 /*
2712  * Compute llite root squash state after a change of root squash
2713  * configuration setting or add/remove of a lnet nid
2714  */
2715 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2716 {
2717         struct root_squash_info *squash = &sbi->ll_squash;
2718         int i;
2719         bool matched;
2720         struct lnet_process_id id;
2721
2722         /* Update norootsquash flag */
2723         down_write(&squash->rsi_sem);
2724         if (list_empty(&squash->rsi_nosquash_nids))
2725                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2726         else {
2727                 /* Do not apply root squash as soon as one of our NIDs is
2728                  * in the nosquash_nids list */
2729                 matched = false;
2730                 i = 0;
2731                 while (LNetGetId(i++, &id) != -ENOENT) {
2732                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2733                                 continue;
2734                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2735                                 matched = true;
2736                                 break;
2737                         }
2738                 }
2739                 if (matched)
2740                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2741                 else
2742                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2743         }
2744         up_write(&squash->rsi_sem);
2745 }
2746
2747 /**
2748  * Parse linkea content to extract information about a given hardlink
2749  *
2750  * \param[in]   ldata      - Initialized linkea data
2751  * \param[in]   linkno     - Link identifier
2752  * \param[out]  parent_fid - The entry's parent FID
2753  * \param[out]  ln         - Entry name destination buffer
2754  *
2755  * \retval 0 on success
2756  * \retval Appropriate negative error code on failure
2757  */
2758 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2759                             struct lu_fid *parent_fid, struct lu_name *ln)
2760 {
2761         unsigned int    idx;
2762         int             rc;
2763         ENTRY;
2764
2765         rc = linkea_init_with_rec(ldata);
2766         if (rc < 0)
2767                 RETURN(rc);
2768
2769         if (linkno >= ldata->ld_leh->leh_reccount)
2770                 /* beyond last link */
2771                 RETURN(-ENODATA);
2772
2773         linkea_first_entry(ldata);
2774         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2775                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2776                                     parent_fid);
2777                 if (idx == linkno)
2778                         break;
2779
2780                 linkea_next_entry(ldata);
2781         }
2782
2783         if (idx < linkno)
2784                 RETURN(-ENODATA);
2785
2786         RETURN(0);
2787 }
2788
2789 /**
2790  * Get parent FID and name of an identified link. Operation is performed for
2791  * a given link number, letting the caller iterate over linkno to list one or
2792  * all links of an entry.
2793  *
2794  * \param[in]     file - File descriptor against which to perform the operation
2795  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2796  *                       on and the available size. It is eventually filled with
2797  *                       the requested information or left untouched on error
2798  *
2799  * \retval - 0 on success
2800  * \retval - Appropriate negative error code on failure
2801  */
2802 int ll_getparent(struct file *file, struct getparent __user *arg)
2803 {
2804         struct inode            *inode = file_inode(file);
2805         struct linkea_data      *ldata;
2806         struct lu_buf            buf = LU_BUF_NULL;
2807         struct lu_name           ln;
2808         struct lu_fid            parent_fid;
2809         __u32                    linkno;
2810         __u32                    name_size;
2811         int                      rc;
2812
2813         ENTRY;
2814
2815         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2816             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2817                 RETURN(-EPERM);
2818
2819         if (get_user(name_size, &arg->gp_name_size))
2820                 RETURN(-EFAULT);
2821
2822         if (get_user(linkno, &arg->gp_linkno))
2823                 RETURN(-EFAULT);
2824
2825         if (name_size > PATH_MAX)
2826                 RETURN(-EINVAL);
2827
2828         OBD_ALLOC(ldata, sizeof(*ldata));
2829         if (ldata == NULL)
2830                 RETURN(-ENOMEM);
2831
2832         rc = linkea_data_new(ldata, &buf);
2833         if (rc < 0)
2834                 GOTO(ldata_free, rc);
2835
2836 #ifdef HAVE_XATTR_HANDLER_FLAGS
2837         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
2838                            buf.lb_len, OBD_MD_FLXATTR);
2839 #else
2840         rc = ll_getxattr(file_dentry(file), XATTR_NAME_LINK, buf.lb_buf,
2841                          buf.lb_len);
2842 #endif /* HAVE_XATTR_HANDLER_FLAGS */
2843         if (rc < 0)
2844                 GOTO(lb_free, rc);
2845
2846         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2847         if (rc < 0)
2848                 GOTO(lb_free, rc);
2849
2850         if (ln.ln_namelen >= name_size)
2851                 GOTO(lb_free, rc = -EOVERFLOW);
2852
2853         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2854                 GOTO(lb_free, rc = -EFAULT);
2855
2856         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2857                 GOTO(lb_free, rc = -EFAULT);
2858
2859         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2860                 GOTO(lb_free, rc = -EFAULT);
2861
2862 lb_free:
2863         lu_buf_free(&buf);
2864 ldata_free:
2865         OBD_FREE(ldata, sizeof(*ldata));
2866
2867         RETURN(rc);
2868 }