Pileus Git - ~andy/linux/blob - drivers/staging/lustre/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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/mm.h>
  46
  47 #include <lustre_lite.h>
  48 #include <lustre_ha.h>
  49 #include <lustre_dlm.h>
  50 #include <lprocfs_status.h>
  51 #include <lustre_disk.h>
  52 #include <lustre_param.h>
  53 #include <lustre_log.h>
  54 #include <cl_object.h>
  55 #include <obd_cksum.h>
  56 #include "llite_internal.h"
  57
  58 struct kmem_cache *ll_file_data_slab;
  59 struct proc_dir_entry *proc_lustre_fs_root;
  60
  61 LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82
  83         OBD_ALLOC(sbi, sizeof(*sbi));
  84         if (!sbi)
  85                 return NULL;
  86
  87         spin_lock_init(&sbi->ll_lock);
  88         mutex_init(&sbi->ll_lco.lco_lock);
  89         spin_lock_init(&sbi->ll_pp_extent_lock);
  90         spin_lock_init(&sbi->ll_process_lock);
  91         sbi->ll_rw_stats_on = 0;
  92
  93         si_meminfo(&si);
  94         pages = si.totalram - si.totalhigh;
  95         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
  96                 lru_page_max = pages / 2;
  97         } else {
  98                 lru_page_max = (pages / 4) * 3;
  99         }
 100
 101         /* initialize lru data */
 102         atomic_set(&sbi->ll_cache.ccc_users, 0);
 103         sbi->ll_cache.ccc_lru_max = lru_page_max;
 104         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 105         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 106         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 107
 108         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 109                                            SBI_DEFAULT_READAHEAD_MAX);
 110         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 111         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 112                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 113         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 114         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 115
 116         ll_generate_random_uuid(uuid);
 117         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 118         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 119
 120         spin_lock(&ll_sb_lock);
 121         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 122         spin_unlock(&ll_sb_lock);
 123
 124         sbi->ll_flags |= LL_SBI_VERBOSE;
 125         sbi->ll_flags |= LL_SBI_CHECKSUM;
 126
 127         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 128
 129         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 130                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 131                                pp_r_hist.oh_lock);
 132                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 133                                pp_w_hist.oh_lock);
 134         }
 135
 136         /* metadata statahead is enabled by default */
 137         sbi->ll_sa_max = LL_SA_RPC_DEF;
 138         atomic_set(&sbi->ll_sa_total, 0);
 139         atomic_set(&sbi->ll_sa_wrong, 0);
 140         atomic_set(&sbi->ll_agl_total, 0);
 141         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 142
 143         return sbi;
 144 }
 145
 146 void ll_free_sbi(struct super_block *sb)
 147 {
 148         struct ll_sb_info *sbi = ll_s2sbi(sb);
 149
 150         if (sbi != NULL) {
 151                 spin_lock(&ll_sb_lock);
 152                 list_del(&sbi->ll_list);
 153                 spin_unlock(&ll_sb_lock);
 154                 OBD_FREE(sbi, sizeof(*sbi));
 155         }
 156 }
 157
 158 static struct dentry_operations ll_d_root_ops = {
 159         .d_compare = ll_dcompare,
 160         .d_revalidate = ll_revalidate_nd,
 161 };
 162
 163 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 164                                     struct vfsmount *mnt)
 165 {
 166         struct inode *root = 0;
 167         struct ll_sb_info *sbi = ll_s2sbi(sb);
 168         struct obd_device *obd;
 169         struct obd_capa *oc = NULL;
 170         struct obd_statfs *osfs = NULL;
 171         struct ptlrpc_request *request = NULL;
 172         struct obd_connect_data *data = NULL;
 173         struct obd_uuid *uuid;
 174         struct md_op_data *op_data;
 175         struct lustre_md lmd;
 176         obd_valid valid;
 177         int size, err, checksum;
 178
 179         obd = class_name2obd(md);
 180         if (!obd) {
 181                 CERROR("MD %s: not setup or attached\n", md);
 182                 return -EINVAL;
 183         }
 184
 185         OBD_ALLOC_PTR(data);
 186         if (data == NULL)
 187                 return -ENOMEM;
 188
 189         OBD_ALLOC_PTR(osfs);
 190         if (osfs == NULL) {
 191                 OBD_FREE_PTR(data);
 192                 return -ENOMEM;
 193         }
 194
 195         if (proc_lustre_fs_root) {
 196                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 197                                                   dt, md);
 198                 if (err < 0)
 199                         CERROR("could not register mount in /proc/fs/lustre\n");
 200         }
 201
 202         /* indicate the features supported by this client */
 203         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 204                                   OBD_CONNECT_ATTRFID  |
 205                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 206                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 207                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 208                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 209                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 210                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 211                                   OBD_CONNECT_EINPROGRESS |
 212                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 213                                   OBD_CONNECT_LAYOUTLOCK |
 214                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_MAX_EASIZE;
 215
 216         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 217                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 218
 219         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 220                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 221 #ifdef CONFIG_FS_POSIX_ACL
 222         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 223 #endif
 224
 225         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 226                 /* flag mdc connection as lightweight, only used for test
 227                  * purpose, use with care */
 228                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 229
 230         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 231         data->ocd_version = LUSTRE_VERSION_CODE;
 232
 233         if (sb->s_flags & MS_RDONLY)
 234                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 235         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 236                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 237
 238 #ifdef HAVE_MS_FLOCK_LOCK
 239         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 240         sb->s_flags |= MS_FLOCK_LOCK;
 241 #endif
 242 #ifdef MS_HAS_NEW_AOPS
 243         sb->s_flags |= MS_HAS_NEW_AOPS;
 244 #endif
 245
 246         if (sbi->ll_flags & LL_SBI_FLOCK)
 247                 sbi->ll_fop = &ll_file_operations_flock;
 248         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 249                 sbi->ll_fop = &ll_file_operations;
 250         else
 251                 sbi->ll_fop = &ll_file_operations_noflock;
 252
 253         /* real client */
 254         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 255         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 256                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 257
 258         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 259
 260         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 261         if (err == -EBUSY) {
 262                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 263                                    "recovery, of which this client is not a "
 264                                    "part. Please wait for recovery to complete,"
 265                                    " abort, or time out.\n", md);
 266                 GOTO(out, err);
 267         } else if (err) {
 268                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 269                 GOTO(out, err);
 270         }
 271
 272         sbi->ll_md_exp->exp_connect_data = *data;
 273
 274         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 275                            LUSTRE_SEQ_METADATA);
 276         if (err) {
 277                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 278                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 279                 GOTO(out_md, err);
 280         }
 281
 282         /* For mount, we only need fs info from MDT0, and also in DNE, it
 283          * can make sure the client can be mounted as long as MDT0 is
 284          * avaible */
 285         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 286                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 287                         OBD_STATFS_FOR_MDT0);
 288         if (err)
 289                 GOTO(out_md_fid, err);
 290
 291         /* This needs to be after statfs to ensure connect has finished.
 292          * Note that "data" does NOT contain the valid connect reply.
 293          * If connecting to a 1.8 server there will be no LMV device, so
 294          * we can access the MDC export directly and exp_connect_flags will
 295          * be non-zero, but if accessing an upgraded 2.1 server it will
 296          * have the correct flags filled in.
 297          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 298         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 299         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 300             valid != CLIENT_CONNECT_MDT_REQD) {
 301                 char *buf;
 302
 303                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 304                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 305                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 306                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 307                                    "feature(s) needed for correct operation "
 308                                    "of this client (%s). Please upgrade "
 309                                    "server or downgrade client.\n",
 310                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 311                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 312                 GOTO(out_md_fid, err = -EPROTO);
 313         }
 314
 315         size = sizeof(*data);
 316         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 317                            KEY_CONN_DATA,  &size, data, NULL);
 318         if (err) {
 319                 CERROR("%s: Get connect data failed: rc = %d\n",
 320                        sbi->ll_md_exp->exp_obd->obd_name, err);
 321                 GOTO(out_md_fid, err);
 322         }
 323
 324         LASSERT(osfs->os_bsize);
 325         sb->s_blocksize = osfs->os_bsize;
 326         sb->s_blocksize_bits = log2(osfs->os_bsize);
 327         sb->s_magic = LL_SUPER_MAGIC;
 328         sb->s_maxbytes = MAX_LFS_FILESIZE;
 329         sbi->ll_namelen = osfs->os_namelen;
 330         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 331
 332         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 333             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 334                 LCONSOLE_INFO("Disabling user_xattr feature because "
 335                               "it is not supported on the server\n");
 336                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 337         }
 338
 339         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 340 #ifdef MS_POSIXACL
 341                 sb->s_flags |= MS_POSIXACL;
 342 #endif
 343                 sbi->ll_flags |= LL_SBI_ACL;
 344         } else {
 345                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 346 #ifdef MS_POSIXACL
 347                 sb->s_flags &= ~MS_POSIXACL;
 348 #endif
 349                 sbi->ll_flags &= ~LL_SBI_ACL;
 350         }
 351
 352         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 353                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 354                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 355                         LCONSOLE_INFO("client is set as remote by default.\n");
 356                 }
 357         } else {
 358                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 359                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 360                         LCONSOLE_INFO("client claims to be remote, but server "
 361                                       "rejected, forced to be local.\n");
 362                 }
 363         }
 364
 365         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 366                 LCONSOLE_INFO("client enabled MDS capability!\n");
 367                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 368         }
 369
 370         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 371                 LCONSOLE_INFO("client enabled OSS capability!\n");
 372                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 373         }
 374
 375         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 376                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 377
 378         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 379                 sbi->ll_md_brw_size = data->ocd_brw_size;
 380         else
 381                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 382
 383         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 384                 LCONSOLE_INFO("Layout lock feature supported.\n");
 385                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 386         }
 387
 388         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 389                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 390                         LCONSOLE_INFO(
 391                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 392                                 dt);
 393                 } else {
 394                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 395                         sbi->ll_xattr_cache_enabled = 1;
 396                 }
 397         }
 398
 399         obd = class_name2obd(dt);
 400         if (!obd) {
 401                 CERROR("DT %s: not setup or attached\n", dt);
 402                 GOTO(out_md_fid, err = -ENODEV);
 403         }
 404
 405         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 406                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 407                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 408                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 409                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 410                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 411                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 412                                   OBD_CONNECT_MAXBYTES |
 413                                   OBD_CONNECT_EINPROGRESS |
 414                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 415                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 416
 417         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 418                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 419
 420         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 421                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 422                  * disabled by default, because it can still be enabled on the
 423                  * fly via /proc. As a consequence, we still need to come to an
 424                  * agreement on the supported algorithms at connect time */
 425                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 426
 427                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 428                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 429                 else
 430                         data->ocd_cksum_types = cksum_types_supported_client();
 431         }
 432
 433         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 434         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 435                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 436
 437         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 438                "ocd_grant: %d\n", data->ocd_connect_flags,
 439                data->ocd_version, data->ocd_grant);
 440
 441         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 442         obd->obd_upcall.onu_upcall = cl_ocd_update;
 443
 444         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 445
 446         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 447                           NULL);
 448         if (err == -EBUSY) {
 449                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 450                                    "recovery, of which this client is not a "
 451                                    "part.  Please wait for recovery to "
 452                                    "complete, abort, or time out.\n", dt);
 453                 GOTO(out_md, err);
 454         } else if (err) {
 455                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 456                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 457                 GOTO(out_md, err);
 458         }
 459
 460         sbi->ll_dt_exp->exp_connect_data = *data;
 461
 462         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 463                            LUSTRE_SEQ_METADATA);
 464         if (err) {
 465                 CERROR("%s: Can't init data layer FID infrastructure, "
 466                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 467                 GOTO(out_dt, err);
 468         }
 469
 470         mutex_lock(&sbi->ll_lco.lco_lock);
 471         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 472         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 473         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 474         mutex_unlock(&sbi->ll_lco.lco_lock);
 475
 476         fid_zero(&sbi->ll_root_fid);
 477         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 478         if (err) {
 479                 CERROR("cannot mds_connect: rc = %d\n", err);
 480                 GOTO(out_lock_cn_cb, err);
 481         }
 482         if (!fid_is_sane(&sbi->ll_root_fid)) {
 483                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 484                        sbi->ll_md_exp->exp_obd->obd_name,
 485                        PFID(&sbi->ll_root_fid));
 486                 GOTO(out_lock_cn_cb, err = -EINVAL);
 487         }
 488         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 489
 490         sb->s_op = &lustre_super_operations;
 491 #if THREAD_SIZE >= 8192 /*b=17630*/
 492         sb->s_export_op = &lustre_export_operations;
 493 #endif
 494
 495         /* make root inode
 496          * XXX: move this to after cbd setup? */
 497         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 498         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 499                 valid |= OBD_MD_FLRMTPERM;
 500         else if (sbi->ll_flags & LL_SBI_ACL)
 501                 valid |= OBD_MD_FLACL;
 502
 503         OBD_ALLOC_PTR(op_data);
 504         if (op_data == NULL)
 505                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 506
 507         op_data->op_fid1 = sbi->ll_root_fid;
 508         op_data->op_mode = 0;
 509         op_data->op_capa1 = oc;
 510         op_data->op_valid = valid;
 511
 512         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 513         if (oc)
 514                 capa_put(oc);
 515         OBD_FREE_PTR(op_data);
 516         if (err) {
 517                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 518                        sbi->ll_md_exp->exp_obd->obd_name, err);
 519                 GOTO(out_lock_cn_cb, err);
 520         }
 521
 522         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 523                                sbi->ll_md_exp, &lmd);
 524         if (err) {
 525                 CERROR("failed to understand root inode md: rc = %d\n", err);
 526                 ptlrpc_req_finished(request);
 527                 GOTO(out_lock_cn_cb, err);
 528         }
 529
 530         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 531         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 532                                             sbi->ll_flags & LL_SBI_32BIT_API),
 533                        &lmd);
 534         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 535         ptlrpc_req_finished(request);
 536
 537         if (root == NULL || IS_ERR(root)) {
 538                 if (lmd.lsm)
 539                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 540 #ifdef CONFIG_FS_POSIX_ACL
 541                 if (lmd.posix_acl) {
 542                         posix_acl_release(lmd.posix_acl);
 543                         lmd.posix_acl = NULL;
 544                 }
 545 #endif
 546                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 547                 root = NULL;
 548                 CERROR("lustre_lite: bad iget4 for root\n");
 549                 GOTO(out_root, err);
 550         }
 551
 552         err = ll_close_thread_start(&sbi->ll_lcq);
 553         if (err) {
 554                 CERROR("cannot start close thread: rc %d\n", err);
 555                 GOTO(out_root, err);
 556         }
 557
 558 #ifdef CONFIG_FS_POSIX_ACL
 559         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 560                 rct_init(&sbi->ll_rct);
 561                 et_init(&sbi->ll_et);
 562         }
 563 #endif
 564
 565         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 566         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 567                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 568                                  NULL);
 569         cl_sb_init(sb);
 570
 571         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 572                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 573                                  &sbi->ll_cache, NULL);
 574
 575         sb->s_root = d_make_root(root);
 576         if (sb->s_root == NULL) {
 577                 CERROR("%s: can't make root dentry\n",
 578                         ll_get_fsname(sb, NULL, 0));
 579                 GOTO(out_root, err = -ENOMEM);
 580         }
 581
 582         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 583         d_set_d_op(sb->s_root, &ll_d_root_ops);
 584         sb->s_d_op = &ll_d_ops;
 585
 586         sbi->ll_sdev_orig = sb->s_dev;
 587
 588         /* We set sb->s_dev equal on all lustre clients in order to support
 589          * NFS export clustering.  NFSD requires that the FSID be the same
 590          * on all clients. */
 591         /* s_dev is also used in lt_compare() to compare two fs, but that is
 592          * only a node-local comparison. */
 593         uuid = obd_get_uuid(sbi->ll_md_exp);
 594         if (uuid != NULL) {
 595                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 596                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 597         }
 598
 599         if (data != NULL)
 600                 OBD_FREE_PTR(data);
 601         if (osfs != NULL)
 602                 OBD_FREE_PTR(osfs);
 603
 604         return err;
 605 out_root:
 606         if (root)
 607                 iput(root);
 608 out_lock_cn_cb:
 609         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 610 out_dt:
 611         obd_disconnect(sbi->ll_dt_exp);
 612         sbi->ll_dt_exp = NULL;
 613         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 614         obd_zombie_barrier();
 615 out_md_fid:
 616         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 617 out_md:
 618         obd_disconnect(sbi->ll_md_exp);
 619         sbi->ll_md_exp = NULL;
 620 out:
 621         if (data != NULL)
 622                 OBD_FREE_PTR(data);
 623         if (osfs != NULL)
 624                 OBD_FREE_PTR(osfs);
 625         lprocfs_unregister_mountpoint(sbi);
 626         return err;
 627 }
 628
 629 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 630 {
 631         int size, rc;
 632
 633         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 634         size = sizeof(int);
 635         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 636                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 637         if (rc)
 638                 CERROR("Get max mdsize error rc %d \n", rc);
 639
 640         return rc;
 641 }
 642
 643 void ll_dump_inode(struct inode *inode)
 644 {
 645         struct ll_d_hlist_node *tmp;
 646         int dentry_count = 0;
 647
 648         LASSERT(inode != NULL);
 649
 650         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 651                 dentry_count++;
 652
 653         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 654                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 655                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 656 }
 657
 658 void lustre_dump_dentry(struct dentry *dentry, int recur)
 659 {
 660         struct list_head *tmp;
 661         int subdirs = 0;
 662
 663         LASSERT(dentry != NULL);
 664
 665         list_for_each(tmp, &dentry->d_subdirs)
 666                 subdirs++;
 667
 668         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 669                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 670                dentry->d_name.len, dentry->d_name.name,
 671                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 672                dentry->d_parent, dentry->d_inode, d_count(dentry),
 673                dentry->d_flags, dentry->d_fsdata, subdirs);
 674         if (dentry->d_inode != NULL)
 675                 ll_dump_inode(dentry->d_inode);
 676
 677         if (recur == 0)
 678                 return;
 679
 680         list_for_each(tmp, &dentry->d_subdirs) {
 681                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 682                 lustre_dump_dentry(d, recur - 1);
 683         }
 684 }
 685
 686 void client_common_put_super(struct super_block *sb)
 687 {
 688         struct ll_sb_info *sbi = ll_s2sbi(sb);
 689
 690 #ifdef CONFIG_FS_POSIX_ACL
 691         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 692                 et_fini(&sbi->ll_et);
 693                 rct_fini(&sbi->ll_rct);
 694         }
 695 #endif
 696
 697         ll_close_thread_shutdown(sbi->ll_lcq);
 698
 699         cl_sb_fini(sb);
 700
 701         list_del(&sbi->ll_conn_chain);
 702
 703         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 704         obd_disconnect(sbi->ll_dt_exp);
 705         sbi->ll_dt_exp = NULL;
 706         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 707          * see LU-2543. */
 708         obd_zombie_barrier();
 709
 710         lprocfs_unregister_mountpoint(sbi);
 711
 712         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 713         obd_disconnect(sbi->ll_md_exp);
 714         sbi->ll_md_exp = NULL;
 715 }
 716
 717 void ll_kill_super(struct super_block *sb)
 718 {
 719         struct ll_sb_info *sbi;
 720
 721         /* not init sb ?*/
 722         if (!(sb->s_flags & MS_ACTIVE))
 723                 return;
 724
 725         sbi = ll_s2sbi(sb);
 726         /* we need restore s_dev from changed for clustred NFS before put_super
 727          * because new kernels have cached s_dev and change sb->s_dev in
 728          * put_super not affected real removing devices */
 729         if (sbi) {
 730                 sb->s_dev = sbi->ll_sdev_orig;
 731                 sbi->ll_umounting = 1;
 732         }
 733 }
 734
 735 char *ll_read_opt(const char *opt, char *data)
 736 {
 737         char *value;
 738         char *retval;
 739
 740         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 741         if (strncmp(opt, data, strlen(opt)))
 742                 return NULL;
 743         if ((value = strchr(data, '=')) == NULL)
 744                 return NULL;
 745
 746         value++;
 747         OBD_ALLOC(retval, strlen(value) + 1);
 748         if (!retval) {
 749                 CERROR("out of memory!\n");
 750                 return NULL;
 751         }
 752
 753         memcpy(retval, value, strlen(value)+1);
 754         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 755         return retval;
 756 }
 757
 758 static inline int ll_set_opt(const char *opt, char *data, int fl)
 759 {
 760         if (strncmp(opt, data, strlen(opt)) != 0)
 761                 return(0);
 762         else
 763                 return(fl);
 764 }
 765
 766 /* non-client-specific mount options are parsed in lmd_parse */
 767 static int ll_options(char *options, int *flags)
 768 {
 769         int tmp;
 770         char *s1 = options, *s2;
 771
 772         if (!options)
 773                 return 0;
 774
 775         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 776
 777         while (*s1) {
 778                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 779                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 780                 if (tmp) {
 781                         *flags |= tmp;
 782                         goto next;
 783                 }
 784                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 785                 if (tmp) {
 786                         *flags |= tmp;
 787                         goto next;
 788                 }
 789                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 790                 if (tmp) {
 791                         *flags |= tmp;
 792                         goto next;
 793                 }
 794                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 795                 if (tmp) {
 796                         *flags &= ~tmp;
 797                         goto next;
 798                 }
 799                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 800                 if (tmp) {
 801                         *flags |= tmp;
 802                         goto next;
 803                 }
 804                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 805                 if (tmp) {
 806                         *flags &= ~tmp;
 807                         goto next;
 808                 }
 809 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 810                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 811                 if (tmp) {
 812                         /* Ignore deprecated mount option.  The client will
 813                          * always try to mount with ACL support, whether this
 814                          * is used depends on whether server supports it. */
 815                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 816                                                   "mount option 'acl'.\n");
 817                         goto next;
 818                 }
 819                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 820                 if (tmp) {
 821                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 822                                                   "mount option 'noacl'.\n");
 823                         goto next;
 824                 }
 825 #else
 826 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 827 #endif
 828                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 829                 if (tmp) {
 830                         *flags |= tmp;
 831                         goto next;
 832                 }
 833                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 834                 if (tmp) {
 835                         *flags |= tmp;
 836                         goto next;
 837                 }
 838                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 839                 if (tmp) {
 840                         *flags &= ~tmp;
 841                         goto next;
 842                 }
 843
 844                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 850                 if (tmp) {
 851                         *flags &= ~tmp;
 852                         goto next;
 853                 }
 854                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 860                 if (tmp) {
 861                         *flags &= ~tmp;
 862                         goto next;
 863                 }
 864                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 870                 if (tmp) {
 871                         *flags &= ~tmp;
 872                         goto next;
 873                 }
 874                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 875                 if (tmp) {
 876                         *flags |= tmp;
 877                         goto next;
 878                 }
 879                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 880                 if (tmp) {
 881                         *flags |= tmp;
 882                         goto next;
 883                 }
 884                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 885                 if (tmp) {
 886                         *flags |= tmp;
 887                         goto next;
 888                 }
 889                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 890                 if (tmp) {
 891                         *flags &= ~tmp;
 892                         goto next;
 893                 }
 894                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 895                                    s1);
 896                 return -EINVAL;
 897
 898 next:
 899                 /* Find next opt */
 900                 s2 = strchr(s1, ',');
 901                 if (s2 == NULL)
 902                         break;
 903                 s1 = s2 + 1;
 904         }
 905         return 0;
 906 }
 907
 908 void ll_lli_init(struct ll_inode_info *lli)
 909 {
 910         lli->lli_inode_magic = LLI_INODE_MAGIC;
 911         lli->lli_flags = 0;
 912         lli->lli_ioepoch = 0;
 913         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 914         spin_lock_init(&lli->lli_lock);
 915         lli->lli_posix_acl = NULL;
 916         lli->lli_remote_perms = NULL;
 917         mutex_init(&lli->lli_rmtperm_mutex);
 918         /* Do not set lli_fid, it has been initialized already. */
 919         fid_zero(&lli->lli_pfid);
 920         INIT_LIST_HEAD(&lli->lli_close_list);
 921         INIT_LIST_HEAD(&lli->lli_oss_capas);
 922         atomic_set(&lli->lli_open_count, 0);
 923         lli->lli_mds_capa = NULL;
 924         lli->lli_rmtperm_time = 0;
 925         lli->lli_pending_och = NULL;
 926         lli->lli_mds_read_och = NULL;
 927         lli->lli_mds_write_och = NULL;
 928         lli->lli_mds_exec_och = NULL;
 929         lli->lli_open_fd_read_count = 0;
 930         lli->lli_open_fd_write_count = 0;
 931         lli->lli_open_fd_exec_count = 0;
 932         mutex_init(&lli->lli_och_mutex);
 933         spin_lock_init(&lli->lli_agl_lock);
 934         lli->lli_has_smd = false;
 935         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 936         lli->lli_clob = NULL;
 937
 938         init_rwsem(&lli->lli_xattrs_list_rwsem);
 939         mutex_init(&lli->lli_xattrs_enq_lock);
 940
 941         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 942         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 943                 mutex_init(&lli->lli_readdir_mutex);
 944                 lli->lli_opendir_key = NULL;
 945                 lli->lli_sai = NULL;
 946                 lli->lli_def_acl = NULL;
 947                 spin_lock_init(&lli->lli_sa_lock);
 948                 lli->lli_opendir_pid = 0;
 949         } else {
 950                 sema_init(&lli->lli_size_sem, 1);
 951                 lli->lli_size_sem_owner = NULL;
 952                 lli->lli_symlink_name = NULL;
 953                 init_rwsem(&lli->lli_trunc_sem);
 954                 mutex_init(&lli->lli_write_mutex);
 955                 init_rwsem(&lli->lli_glimpse_sem);
 956                 lli->lli_glimpse_time = 0;
 957                 INIT_LIST_HEAD(&lli->lli_agl_list);
 958                 lli->lli_agl_index = 0;
 959                 lli->lli_async_rc = 0;
 960                 lli->lli_volatile = false;
 961         }
 962         mutex_init(&lli->lli_layout_mutex);
 963 }
 964
 965 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 966 {
 967         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 968
 969         bdi->name = "lustre";
 970         return bdi_register(bdi, NULL, "lustre-%d",
 971                             atomic_inc_return(&ll_bdi_num));
 972 }
 973
 974 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 975 {
 976         struct lustre_profile *lprof = NULL;
 977         struct lustre_sb_info *lsi = s2lsi(sb);
 978         struct ll_sb_info *sbi;
 979         char  *dt = NULL, *md = NULL;
 980         char  *profilenm = get_profile_name(sb);
 981         struct config_llog_instance *cfg;
 982         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 983         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 984         int    err;
 985
 986         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 987
 988         OBD_ALLOC_PTR(cfg);
 989         if (cfg == NULL)
 990                 return -ENOMEM;
 991
 992         try_module_get(THIS_MODULE);
 993
 994         /* client additional sb info */
 995         lsi->lsi_llsbi = sbi = ll_init_sbi();
 996         if (!sbi) {
 997                 module_put(THIS_MODULE);
 998                 OBD_FREE_PTR(cfg);
 999                 return -ENOMEM;
1000         }
1001
1002         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1003         if (err)
1004                 GOTO(out_free, err);
1005
1006         err = bdi_init(&lsi->lsi_bdi);
1007         if (err)
1008                 GOTO(out_free, err);
1009         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1010         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1011         err = ll_bdi_register(&lsi->lsi_bdi);
1012         if (err)
1013                 GOTO(out_free, err);
1014
1015         sb->s_bdi = &lsi->lsi_bdi;
1016
1017         /* Generate a string unique to this super, in case some joker tries
1018            to mount the same fs at two mount points.
1019            Use the address of the super itself.*/
1020         cfg->cfg_instance = sb;
1021         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1022         cfg->cfg_callback = class_config_llog_handler;
1023         /* set up client obds */
1024         err = lustre_process_log(sb, profilenm, cfg);
1025         if (err < 0) {
1026                 CERROR("Unable to process log: %d\n", err);
1027                 GOTO(out_free, err);
1028         }
1029
1030         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1031         lprof = class_get_profile(profilenm);
1032         if (lprof == NULL) {
1033                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1034                                    " read from the MGS.  Does that filesystem "
1035                                    "exist?\n", profilenm);
1036                 GOTO(out_free, err = -EINVAL);
1037         }
1038         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1039                lprof->lp_md, lprof->lp_dt);
1040
1041         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1042         if (!dt)
1043                 GOTO(out_free, err = -ENOMEM);
1044         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1045
1046         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1047         if (!md)
1048                 GOTO(out_free, err = -ENOMEM);
1049         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1050
1051         /* connections, registrations, sb setup */
1052         err = client_common_fill_super(sb, md, dt, mnt);
1053
1054 out_free:
1055         if (md)
1056                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1057         if (dt)
1058                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1059         if (err)
1060                 ll_put_super(sb);
1061         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1062                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1063
1064         OBD_FREE_PTR(cfg);
1065         return err;
1066 } /* ll_fill_super */
1067
1068 void ll_put_super(struct super_block *sb)
1069 {
1070         struct config_llog_instance cfg;
1071         struct obd_device *obd;
1072         struct lustre_sb_info *lsi = s2lsi(sb);
1073         struct ll_sb_info *sbi = ll_s2sbi(sb);
1074         char *profilenm = get_profile_name(sb);
1075         int next, force = 1;
1076
1077         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1078
1079         ll_print_capa_stat(sbi);
1080
1081         cfg.cfg_instance = sb;
1082         lustre_end_log(sb, profilenm, &cfg);
1083
1084         if (sbi->ll_md_exp) {
1085                 obd = class_exp2obd(sbi->ll_md_exp);
1086                 if (obd)
1087                         force = obd->obd_force;
1088         }
1089
1090         /* We need to set force before the lov_disconnect in
1091            lustre_common_put_super, since l_d cleans up osc's as well. */
1092         if (force) {
1093                 next = 0;
1094                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1095                                                      &next)) != NULL) {
1096                         obd->obd_force = force;
1097                 }
1098         }
1099
1100         if (sbi->ll_lcq) {
1101                 /* Only if client_common_fill_super succeeded */
1102                 client_common_put_super(sb);
1103         }
1104
1105         next = 0;
1106         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1107                 class_manual_cleanup(obd);
1108         }
1109
1110         if (sbi->ll_flags & LL_SBI_VERBOSE)
1111                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1112
1113         if (profilenm)
1114                 class_del_profile(profilenm);
1115
1116         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1117                 bdi_destroy(&lsi->lsi_bdi);
1118                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1119         }
1120
1121         ll_free_sbi(sb);
1122         lsi->lsi_llsbi = NULL;
1123
1124         lustre_common_put_super(sb);
1125
1126         module_put(THIS_MODULE);
1127 } /* client_put_super */
1128
1129 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1130 {
1131         struct inode *inode = NULL;
1132
1133         /* NOTE: we depend on atomic igrab() -bzzz */
1134         lock_res_and_lock(lock);
1135         if (lock->l_resource->lr_lvb_inode) {
1136                 struct ll_inode_info * lli;
1137                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1138                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1139                         inode = igrab(lock->l_resource->lr_lvb_inode);
1140                 } else {
1141                         inode = lock->l_resource->lr_lvb_inode;
1142                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1143                                          D_WARNING, lock, "lr_lvb_inode %p is "
1144                                          "bogus: magic %08x",
1145                                          lock->l_resource->lr_lvb_inode,
1146                                          lli->lli_inode_magic);
1147                         inode = NULL;
1148                 }
1149         }
1150         unlock_res_and_lock(lock);
1151         return inode;
1152 }
1153
1154 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1155 {
1156         struct inode *inode = NULL;
1157         /* NOTE: we depend on atomic igrab() -bzzz */
1158         lock_res_and_lock(lock);
1159         if (lock->l_ast_data) {
1160                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1161                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1162                         inode = igrab(lock->l_ast_data);
1163                 } else {
1164                         inode = lock->l_ast_data;
1165                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1166                                          D_WARNING, lock, "l_ast_data %p is "
1167                                          "bogus: magic %08x", lock->l_ast_data,
1168                                          lli->lli_inode_magic);
1169                         inode = NULL;
1170                 }
1171         }
1172         unlock_res_and_lock(lock);
1173         return inode;
1174 }
1175
1176 void ll_clear_inode(struct inode *inode)
1177 {
1178         struct ll_inode_info *lli = ll_i2info(inode);
1179         struct ll_sb_info *sbi = ll_i2sbi(inode);
1180
1181         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1182                inode->i_generation, inode);
1183
1184         if (S_ISDIR(inode->i_mode)) {
1185                 /* these should have been cleared in ll_file_release */
1186                 LASSERT(lli->lli_opendir_key == NULL);
1187                 LASSERT(lli->lli_sai == NULL);
1188                 LASSERT(lli->lli_opendir_pid == 0);
1189         }
1190
1191         spin_lock(&lli->lli_lock);
1192         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1193         spin_unlock(&lli->lli_lock);
1194         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1195
1196         LASSERT(!lli->lli_open_fd_write_count);
1197         LASSERT(!lli->lli_open_fd_read_count);
1198         LASSERT(!lli->lli_open_fd_exec_count);
1199
1200         if (lli->lli_mds_write_och)
1201                 ll_md_real_close(inode, FMODE_WRITE);
1202         if (lli->lli_mds_exec_och)
1203                 ll_md_real_close(inode, FMODE_EXEC);
1204         if (lli->lli_mds_read_och)
1205                 ll_md_real_close(inode, FMODE_READ);
1206
1207         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1208                 OBD_FREE(lli->lli_symlink_name,
1209                          strlen(lli->lli_symlink_name) + 1);
1210                 lli->lli_symlink_name = NULL;
1211         }
1212
1213         ll_xattr_cache_destroy(inode);
1214
1215         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1216                 LASSERT(lli->lli_posix_acl == NULL);
1217                 if (lli->lli_remote_perms) {
1218                         free_rmtperm_hash(lli->lli_remote_perms);
1219                         lli->lli_remote_perms = NULL;
1220                 }
1221         }
1222 #ifdef CONFIG_FS_POSIX_ACL
1223         else if (lli->lli_posix_acl) {
1224                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1225                 LASSERT(lli->lli_remote_perms == NULL);
1226                 posix_acl_release(lli->lli_posix_acl);
1227                 lli->lli_posix_acl = NULL;
1228         }
1229 #endif
1230         lli->lli_inode_magic = LLI_INODE_DEAD;
1231
1232         ll_clear_inode_capas(inode);
1233         if (!S_ISDIR(inode->i_mode))
1234                 LASSERT(list_empty(&lli->lli_agl_list));
1235
1236         /*
1237          * XXX This has to be done before lsm is freed below, because
1238          * cl_object still uses inode lsm.
1239          */
1240         cl_inode_fini(inode);
1241         lli->lli_has_smd = false;
1242 }
1243
1244 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1245                   struct md_open_data **mod)
1246 {
1247         struct lustre_md md;
1248         struct inode *inode = dentry->d_inode;
1249         struct ll_sb_info *sbi = ll_i2sbi(inode);
1250         struct ptlrpc_request *request = NULL;
1251         int rc, ia_valid;
1252
1253         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1254                                      LUSTRE_OPC_ANY, NULL);
1255         if (IS_ERR(op_data))
1256                 return PTR_ERR(op_data);
1257
1258         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1259                         &request, mod);
1260         if (rc) {
1261                 ptlrpc_req_finished(request);
1262                 if (rc == -ENOENT) {
1263                         clear_nlink(inode);
1264                         /* Unlinked special device node? Or just a race?
1265                          * Pretend we done everything. */
1266                         if (!S_ISREG(inode->i_mode) &&
1267                             !S_ISDIR(inode->i_mode)) {
1268                                 ia_valid = op_data->op_attr.ia_valid;
1269                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1270                                 rc = simple_setattr(dentry, &op_data->op_attr);
1271                                 op_data->op_attr.ia_valid = ia_valid;
1272                         }
1273                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1274                         CERROR("md_setattr fails: rc = %d\n", rc);
1275                 }
1276                 return rc;
1277         }
1278
1279         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1280                               sbi->ll_md_exp, &md);
1281         if (rc) {
1282                 ptlrpc_req_finished(request);
1283                 return rc;
1284         }
1285
1286         ia_valid = op_data->op_attr.ia_valid;
1287         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1288          * cache is not cleared yet. */
1289         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1290         rc = simple_setattr(dentry, &op_data->op_attr);
1291         op_data->op_attr.ia_valid = ia_valid;
1292
1293         /* Extract epoch data if obtained. */
1294         op_data->op_handle = md.body->handle;
1295         op_data->op_ioepoch = md.body->ioepoch;
1296
1297         ll_update_inode(inode, &md);
1298         ptlrpc_req_finished(request);
1299
1300         return rc;
1301 }
1302
1303 /* Close IO epoch and send Size-on-MDS attribute update. */
1304 static int ll_setattr_done_writing(struct inode *inode,
1305                                    struct md_op_data *op_data,
1306                                    struct md_open_data *mod)
1307 {
1308         struct ll_inode_info *lli = ll_i2info(inode);
1309         int rc = 0;
1310
1311         LASSERT(op_data != NULL);
1312         if (!S_ISREG(inode->i_mode))
1313                 return 0;
1314
1315         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1316                op_data->op_ioepoch, PFID(&lli->lli_fid));
1317
1318         op_data->op_flags = MF_EPOCH_CLOSE;
1319         ll_done_writing_attr(inode, op_data);
1320         ll_pack_inode2opdata(inode, op_data, NULL);
1321
1322         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1323         if (rc == -EAGAIN) {
1324                 /* MDS has instructed us to obtain Size-on-MDS attribute
1325                  * from OSTs and send setattr to back to MDS. */
1326                 rc = ll_som_update(inode, op_data);
1327         } else if (rc) {
1328                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1329                        inode->i_ino, rc);
1330         }
1331         return rc;
1332 }
1333
1334 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1335 {
1336         struct obd_capa *capa;
1337         int rc;
1338
1339         if (attr->ia_valid & ATTR_SIZE)
1340                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1341         else
1342                 capa = ll_mdscapa_get(inode);
1343
1344         rc = cl_setattr_ost(inode, attr, capa);
1345
1346         if (attr->ia_valid & ATTR_SIZE)
1347                 ll_truncate_free_capa(capa);
1348         else
1349                 capa_put(capa);
1350
1351         return rc;
1352 }
1353
1354
1355 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1356  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1357  * keep these values until such a time that objects are allocated for it.
1358  * We do the MDS operations first, as it is checking permissions for us.
1359  * We don't to the MDS RPC if there is nothing that we want to store there,
1360  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1361  * going to do an RPC anyways.
1362  *
1363  * If we are doing a truncate, we will send the mtime and ctime updates
1364  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1365  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1366  * at the same time.
1367  *
1368  * In case of HSMimport, we only set attr on MDS.
1369  */
1370 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1371 {
1372         struct inode *inode = dentry->d_inode;
1373         struct ll_inode_info *lli = ll_i2info(inode);
1374         struct md_op_data *op_data = NULL;
1375         struct md_open_data *mod = NULL;
1376         bool file_is_released = false;
1377         int rc = 0, rc1 = 0;
1378
1379         CDEBUG(D_VFSTRACE,
1380                 "%s: setattr inode %p/fid:"DFID
1381                 " from %llu to %llu, valid %x, hsm_import %d\n",
1382                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1383                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1384                 attr->ia_valid, hsm_import);
1385
1386         if (attr->ia_valid & ATTR_SIZE) {
1387                 /* Check new size against VFS/VM file size limit and rlimit */
1388                 rc = inode_newsize_ok(inode, attr->ia_size);
1389                 if (rc)
1390                         return rc;
1391
1392                 /* The maximum Lustre file size is variable, based on the
1393                  * OST maximum object size and number of stripes.  This
1394                  * needs another check in addition to the VFS check above. */
1395                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1396                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1397                                PFID(&lli->lli_fid), attr->ia_size,
1398                                ll_file_maxbytes(inode));
1399                         return -EFBIG;
1400                 }
1401
1402                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1403         }
1404
1405         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1406         if (attr->ia_valid & TIMES_SET_FLAGS) {
1407                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1408                     !cfs_capable(CFS_CAP_FOWNER))
1409                         return -EPERM;
1410         }
1411
1412         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1413         if (attr->ia_valid & ATTR_CTIME) {
1414                 attr->ia_ctime = CURRENT_TIME;
1415                 attr->ia_valid |= ATTR_CTIME_SET;
1416         }
1417         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1418             (attr->ia_valid & ATTR_ATIME)) {
1419                 attr->ia_atime = CURRENT_TIME;
1420                 attr->ia_valid |= ATTR_ATIME_SET;
1421         }
1422         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1423             (attr->ia_valid & ATTR_MTIME)) {
1424                 attr->ia_mtime = CURRENT_TIME;
1425                 attr->ia_valid |= ATTR_MTIME_SET;
1426         }
1427
1428         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1429                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1430                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1431                        cfs_time_current_sec());
1432
1433         /* If we are changing file size, file content is modified, flag it. */
1434         if (attr->ia_valid & ATTR_SIZE) {
1435                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1436                 spin_lock(&lli->lli_lock);
1437                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1438                 spin_unlock(&lli->lli_lock);
1439         }
1440
1441         /* We always do an MDS RPC, even if we're only changing the size;
1442          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1443
1444         OBD_ALLOC_PTR(op_data);
1445         if (op_data == NULL)
1446                 return -ENOMEM;
1447
1448         if (!S_ISDIR(inode->i_mode)) {
1449                 if (attr->ia_valid & ATTR_SIZE)
1450                         inode_dio_write_done(inode);
1451                 mutex_unlock(&inode->i_mutex);
1452                 down_write(&lli->lli_trunc_sem);
1453         }
1454
1455         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1456
1457         /* Open epoch for truncate. */
1458         if (exp_connect_som(ll_i2mdexp(inode)) &&
1459             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1460                 op_data->op_flags = MF_EPOCH_OPEN;
1461
1462         /* truncate on a released file must failed with -ENODATA,
1463          * so size must not be set on MDS for released file
1464          * but other attributes must be set
1465          */
1466         if (S_ISREG(inode->i_mode)) {
1467                 struct lov_stripe_md *lsm;
1468                 __u32 gen;
1469
1470                 ll_layout_refresh(inode, &gen);
1471                 lsm = ccc_inode_lsm_get(inode);
1472                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1473                         file_is_released = true;
1474                 ccc_inode_lsm_put(inode, lsm);
1475         }
1476
1477         /* if not in HSM import mode, clear size attr for released file
1478          * we clear the attribute send to MDT in op_data, not the original
1479          * received from caller in attr which is used later to
1480          * decide return code */
1481         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1482                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1483
1484         rc = ll_md_setattr(dentry, op_data, &mod);
1485         if (rc)
1486                 GOTO(out, rc);
1487
1488         /* truncate failed (only when non HSM import), others succeed */
1489         if (file_is_released) {
1490                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1491                         GOTO(out, rc = -ENODATA);
1492                 else
1493                         GOTO(out, rc = 0);
1494         }
1495
1496         /* RPC to MDT is sent, cancel data modification flag */
1497         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1498                 spin_lock(&lli->lli_lock);
1499                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1500                 spin_unlock(&lli->lli_lock);
1501         }
1502
1503         ll_ioepoch_open(lli, op_data->op_ioepoch);
1504         if (!S_ISREG(inode->i_mode))
1505                 GOTO(out, rc = 0);
1506
1507         if (attr->ia_valid & (ATTR_SIZE |
1508                               ATTR_ATIME | ATTR_ATIME_SET |
1509                               ATTR_MTIME | ATTR_MTIME_SET))
1510                 /* For truncate and utimes sending attributes to OSTs, setting
1511                  * mtime/atime to the past will be performed under PW [0:EOF]
1512                  * extent lock (new_size:EOF for truncate).  It may seem
1513                  * excessive to send mtime/atime updates to OSTs when not
1514                  * setting times to past, but it is necessary due to possible
1515                  * time de-synchronization between MDT inode and OST objects */
1516                 rc = ll_setattr_ost(inode, attr);
1517 out:
1518         if (op_data) {
1519                 if (op_data->op_ioepoch) {
1520                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1521                         if (!rc)
1522                                 rc = rc1;
1523                 }
1524                 ll_finish_md_op_data(op_data);
1525         }
1526         if (!S_ISDIR(inode->i_mode)) {
1527                 up_write(&lli->lli_trunc_sem);
1528                 mutex_lock(&inode->i_mutex);
1529                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1530                         inode_dio_wait(inode);
1531         }
1532
1533         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1534                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1535
1536         return rc;
1537 }
1538
1539 int ll_setattr(struct dentry *de, struct iattr *attr)
1540 {
1541         int mode = de->d_inode->i_mode;
1542
1543         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1544                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1545                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1546
1547         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1548                                (ATTR_SIZE|ATTR_MODE)) &&
1549             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1550              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1551               !(attr->ia_mode & S_ISGID))))
1552                 attr->ia_valid |= ATTR_FORCE;
1553
1554         if ((mode & S_ISUID) &&
1555             !(attr->ia_mode & S_ISUID) &&
1556             !(attr->ia_valid & ATTR_KILL_SUID))
1557                 attr->ia_valid |= ATTR_KILL_SUID;
1558
1559         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1560             !(attr->ia_mode & S_ISGID) &&
1561             !(attr->ia_valid & ATTR_KILL_SGID))
1562                 attr->ia_valid |= ATTR_KILL_SGID;
1563
1564         return ll_setattr_raw(de, attr, false);
1565 }
1566
1567 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1568                        __u64 max_age, __u32 flags)
1569 {
1570         struct ll_sb_info *sbi = ll_s2sbi(sb);
1571         struct obd_statfs obd_osfs;
1572         int rc;
1573
1574         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1575         if (rc) {
1576                 CERROR("md_statfs fails: rc = %d\n", rc);
1577                 return rc;
1578         }
1579
1580         osfs->os_type = sb->s_magic;
1581
1582         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1583                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1584
1585         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1586                 flags |= OBD_STATFS_NODELAY;
1587
1588         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1589         if (rc) {
1590                 CERROR("obd_statfs fails: rc = %d\n", rc);
1591                 return rc;
1592         }
1593
1594         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1595                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1596                obd_osfs.os_files);
1597
1598         osfs->os_bsize = obd_osfs.os_bsize;
1599         osfs->os_blocks = obd_osfs.os_blocks;
1600         osfs->os_bfree = obd_osfs.os_bfree;
1601         osfs->os_bavail = obd_osfs.os_bavail;
1602
1603         /* If we don't have as many objects free on the OST as inodes
1604          * on the MDS, we reduce the total number of inodes to
1605          * compensate, so that the "inodes in use" number is correct.
1606          */
1607         if (obd_osfs.os_ffree < osfs->os_ffree) {
1608                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1609                         obd_osfs.os_ffree;
1610                 osfs->os_ffree = obd_osfs.os_ffree;
1611         }
1612
1613         return rc;
1614 }
1615 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1616 {
1617         struct super_block *sb = de->d_sb;
1618         struct obd_statfs osfs;
1619         int rc;
1620
1621         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1622         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1623
1624         /* Some amount of caching on the client is allowed */
1625         rc = ll_statfs_internal(sb, &osfs,
1626                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1627                                 0);
1628         if (rc)
1629                 return rc;
1630
1631         statfs_unpack(sfs, &osfs);
1632
1633         /* We need to downshift for all 32-bit kernels, because we can't
1634          * tell if the kernel is being called via sys_statfs64() or not.
1635          * Stop before overflowing f_bsize - in which case it is better
1636          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1637         if (sizeof(long) < 8) {
1638                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1639                         sfs->f_bsize <<= 1;
1640
1641                         osfs.os_blocks >>= 1;
1642                         osfs.os_bfree >>= 1;
1643                         osfs.os_bavail >>= 1;
1644                 }
1645         }
1646
1647         sfs->f_blocks = osfs.os_blocks;
1648         sfs->f_bfree = osfs.os_bfree;
1649         sfs->f_bavail = osfs.os_bavail;
1650         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1651         return 0;
1652 }
1653
1654 void ll_inode_size_lock(struct inode *inode)
1655 {
1656         struct ll_inode_info *lli;
1657
1658         LASSERT(!S_ISDIR(inode->i_mode));
1659
1660         lli = ll_i2info(inode);
1661         LASSERT(lli->lli_size_sem_owner != current);
1662         down(&lli->lli_size_sem);
1663         LASSERT(lli->lli_size_sem_owner == NULL);
1664         lli->lli_size_sem_owner = current;
1665 }
1666
1667 void ll_inode_size_unlock(struct inode *inode)
1668 {
1669         struct ll_inode_info *lli;
1670
1671         lli = ll_i2info(inode);
1672         LASSERT(lli->lli_size_sem_owner == current);
1673         lli->lli_size_sem_owner = NULL;
1674         up(&lli->lli_size_sem);
1675 }
1676
1677 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1678 {
1679         struct ll_inode_info *lli = ll_i2info(inode);
1680         struct mdt_body *body = md->body;
1681         struct lov_stripe_md *lsm = md->lsm;
1682         struct ll_sb_info *sbi = ll_i2sbi(inode);
1683
1684         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1685         if (lsm != NULL) {
1686                 if (!lli->lli_has_smd &&
1687                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1688                         cl_file_inode_init(inode, md);
1689
1690                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1691                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1692                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1693         }
1694
1695         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1696                 if (body->valid & OBD_MD_FLRMTPERM)
1697                         ll_update_remote_perm(inode, md->remote_perm);
1698         }
1699 #ifdef CONFIG_FS_POSIX_ACL
1700         else if (body->valid & OBD_MD_FLACL) {
1701                 spin_lock(&lli->lli_lock);
1702                 if (lli->lli_posix_acl)
1703                         posix_acl_release(lli->lli_posix_acl);
1704                 lli->lli_posix_acl = md->posix_acl;
1705                 spin_unlock(&lli->lli_lock);
1706         }
1707 #endif
1708         inode->i_ino = cl_fid_build_ino(&body->fid1,
1709                                         sbi->ll_flags & LL_SBI_32BIT_API);
1710         inode->i_generation = cl_fid_build_gen(&body->fid1);
1711
1712         if (body->valid & OBD_MD_FLATIME) {
1713                 if (body->atime > LTIME_S(inode->i_atime))
1714                         LTIME_S(inode->i_atime) = body->atime;
1715                 lli->lli_lvb.lvb_atime = body->atime;
1716         }
1717         if (body->valid & OBD_MD_FLMTIME) {
1718                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1719                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1720                                "to "LPU64"\n", inode->i_ino,
1721                                LTIME_S(inode->i_mtime), body->mtime);
1722                         LTIME_S(inode->i_mtime) = body->mtime;
1723                 }
1724                 lli->lli_lvb.lvb_mtime = body->mtime;
1725         }
1726         if (body->valid & OBD_MD_FLCTIME) {
1727                 if (body->ctime > LTIME_S(inode->i_ctime))
1728                         LTIME_S(inode->i_ctime) = body->ctime;
1729                 lli->lli_lvb.lvb_ctime = body->ctime;
1730         }
1731         if (body->valid & OBD_MD_FLMODE)
1732                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1733         if (body->valid & OBD_MD_FLTYPE)
1734                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1735         LASSERT(inode->i_mode != 0);
1736         if (S_ISREG(inode->i_mode)) {
1737                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1738         } else {
1739                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1740         }
1741         if (body->valid & OBD_MD_FLUID)
1742                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1743         if (body->valid & OBD_MD_FLGID)
1744                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1745         if (body->valid & OBD_MD_FLFLAGS)
1746                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1747         if (body->valid & OBD_MD_FLNLINK)
1748                 set_nlink(inode, body->nlink);
1749         if (body->valid & OBD_MD_FLRDEV)
1750                 inode->i_rdev = old_decode_dev(body->rdev);
1751
1752         if (body->valid & OBD_MD_FLID) {
1753                 /* FID shouldn't be changed! */
1754                 if (fid_is_sane(&lli->lli_fid)) {
1755                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1756                                  "Trying to change FID "DFID
1757                                  " to the "DFID", inode %lu/%u(%p)\n",
1758                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1759                                  inode->i_ino, inode->i_generation, inode);
1760                 } else
1761                         lli->lli_fid = body->fid1;
1762         }
1763
1764         LASSERT(fid_seq(&lli->lli_fid) != 0);
1765
1766         if (body->valid & OBD_MD_FLSIZE) {
1767                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1768                     S_ISREG(inode->i_mode)) {
1769                         struct lustre_handle lockh;
1770                         ldlm_mode_t mode;
1771
1772                         /* As it is possible a blocking ast has been processed
1773                          * by this time, we need to check there is an UPDATE
1774                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1775                          * it. */
1776                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1777                                                &lockh, LDLM_FL_CBPENDING,
1778                                                LCK_CR | LCK_CW |
1779                                                LCK_PR | LCK_PW);
1780                         if (mode) {
1781                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1782                                                       LLIF_EPOCH_PENDING |
1783                                                       LLIF_SOM_DIRTY)) {
1784                                         CERROR("ino %lu flags %u still has "
1785                                                "size authority! do not trust "
1786                                                "the size got from MDS\n",
1787                                                inode->i_ino, lli->lli_flags);
1788                                 } else {
1789                                         /* Use old size assignment to avoid
1790                                          * deadlock bz14138 & bz14326 */
1791                                         i_size_write(inode, body->size);
1792                                         spin_lock(&lli->lli_lock);
1793                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1794                                         spin_unlock(&lli->lli_lock);
1795                                 }
1796                                 ldlm_lock_decref(&lockh, mode);
1797                         }
1798                 } else {
1799                         /* Use old size assignment to avoid
1800                          * deadlock bz14138 & bz14326 */
1801                         i_size_write(inode, body->size);
1802
1803                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1804                                inode->i_ino, (unsigned long long)body->size);
1805                 }
1806
1807                 if (body->valid & OBD_MD_FLBLOCKS)
1808                         inode->i_blocks = body->blocks;
1809         }
1810
1811         if (body->valid & OBD_MD_FLMDSCAPA) {
1812                 LASSERT(md->mds_capa);
1813                 ll_add_capa(inode, md->mds_capa);
1814         }
1815         if (body->valid & OBD_MD_FLOSSCAPA) {
1816                 LASSERT(md->oss_capa);
1817                 ll_add_capa(inode, md->oss_capa);
1818         }
1819
1820         if (body->valid & OBD_MD_TSTATE) {
1821                 if (body->t_state & MS_RESTORE)
1822                         lli->lli_flags |= LLIF_FILE_RESTORING;
1823         }
1824 }
1825
1826 void ll_read_inode2(struct inode *inode, void *opaque)
1827 {
1828         struct lustre_md *md = opaque;
1829         struct ll_inode_info *lli = ll_i2info(inode);
1830
1831         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1832                PFID(&lli->lli_fid), inode);
1833
1834         LASSERT(!lli->lli_has_smd);
1835
1836         /* Core attributes from the MDS first.  This is a new inode, and
1837          * the VFS doesn't zero times in the core inode so we have to do
1838          * it ourselves.  They will be overwritten by either MDS or OST
1839          * attributes - we just need to make sure they aren't newer. */
1840         LTIME_S(inode->i_mtime) = 0;
1841         LTIME_S(inode->i_atime) = 0;
1842         LTIME_S(inode->i_ctime) = 0;
1843         inode->i_rdev = 0;
1844         ll_update_inode(inode, md);
1845
1846         /* OIDEBUG(inode); */
1847
1848         /* initializing backing dev info. */
1849         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1850
1851
1852         if (S_ISREG(inode->i_mode)) {
1853                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1854                 inode->i_op = &ll_file_inode_operations;
1855                 inode->i_fop = sbi->ll_fop;
1856                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1857         } else if (S_ISDIR(inode->i_mode)) {
1858                 inode->i_op = &ll_dir_inode_operations;
1859                 inode->i_fop = &ll_dir_operations;
1860         } else if (S_ISLNK(inode->i_mode)) {
1861                 inode->i_op = &ll_fast_symlink_inode_operations;
1862         } else {
1863                 inode->i_op = &ll_special_inode_operations;
1864
1865                 init_special_inode(inode, inode->i_mode,
1866                                    inode->i_rdev);
1867         }
1868 }
1869
1870 void ll_delete_inode(struct inode *inode)
1871 {
1872         struct cl_inode_info *lli = cl_i2info(inode);
1873
1874         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1875                 /* discard all dirty pages before truncating them, required by
1876                  * osc_extent implementation at LU-1030. */
1877                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1878                                    CL_FSYNC_DISCARD, 1);
1879
1880         truncate_inode_pages(&inode->i_data, 0);
1881
1882         /* Workaround for LU-118 */
1883         if (inode->i_data.nrpages) {
1884                 TREE_READ_LOCK_IRQ(&inode->i_data);
1885                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1886                 LASSERTF(inode->i_data.nrpages == 0,
1887                          "inode=%lu/%u(%p) nrpages=%lu, see "
1888                          "http://jira.whamcloud.com/browse/LU-118\n",
1889                          inode->i_ino, inode->i_generation, inode,
1890                          inode->i_data.nrpages);
1891         }
1892         /* Workaround end */
1893
1894         ll_clear_inode(inode);
1895         clear_inode(inode);
1896 }
1897
1898 int ll_iocontrol(struct inode *inode, struct file *file,
1899                  unsigned int cmd, unsigned long arg)
1900 {
1901         struct ll_sb_info *sbi = ll_i2sbi(inode);
1902         struct ptlrpc_request *req = NULL;
1903         int rc, flags = 0;
1904
1905         switch(cmd) {
1906         case FSFILT_IOC_GETFLAGS: {
1907                 struct mdt_body *body;
1908                 struct md_op_data *op_data;
1909
1910                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1911                                              0, 0, LUSTRE_OPC_ANY,
1912                                              NULL);
1913                 if (IS_ERR(op_data))
1914                         return PTR_ERR(op_data);
1915
1916                 op_data->op_valid = OBD_MD_FLFLAGS;
1917                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1918                 ll_finish_md_op_data(op_data);
1919                 if (rc) {
1920                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1921                         return -abs(rc);
1922                 }
1923
1924                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1925
1926                 flags = body->flags;
1927
1928                 ptlrpc_req_finished(req);
1929
1930                 return put_user(flags, (int *)arg);
1931         }
1932         case FSFILT_IOC_SETFLAGS: {
1933                 struct lov_stripe_md *lsm;
1934                 struct obd_info oinfo = { { { 0 } } };
1935                 struct md_op_data *op_data;
1936
1937                 if (get_user(flags, (int *)arg))
1938                         return -EFAULT;
1939
1940                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1941                                              LUSTRE_OPC_ANY, NULL);
1942                 if (IS_ERR(op_data))
1943                         return PTR_ERR(op_data);
1944
1945                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1946                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1947                 rc = md_setattr(sbi->ll_md_exp, op_data,
1948                                 NULL, 0, NULL, 0, &req, NULL);
1949                 ll_finish_md_op_data(op_data);
1950                 ptlrpc_req_finished(req);
1951                 if (rc)
1952                         return rc;
1953
1954                 inode->i_flags = ll_ext_to_inode_flags(flags);
1955
1956                 lsm = ccc_inode_lsm_get(inode);
1957                 if (!lsm_has_objects(lsm)) {
1958                         ccc_inode_lsm_put(inode, lsm);
1959                         return 0;
1960                 }
1961
1962                 OBDO_ALLOC(oinfo.oi_oa);
1963                 if (!oinfo.oi_oa) {
1964                         ccc_inode_lsm_put(inode, lsm);
1965                         return -ENOMEM;
1966                 }
1967                 oinfo.oi_md = lsm;
1968                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1969                 oinfo.oi_oa->o_flags = flags;
1970                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1971                                        OBD_MD_FLGROUP;
1972                 oinfo.oi_capa = ll_mdscapa_get(inode);
1973                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1974                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1975                 capa_put(oinfo.oi_capa);
1976                 OBDO_FREE(oinfo.oi_oa);
1977                 ccc_inode_lsm_put(inode, lsm);
1978
1979                 if (rc && rc != -EPERM && rc != -EACCES)
1980                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1981
1982                 return rc;
1983         }
1984         default:
1985                 return -ENOSYS;
1986         }
1987
1988         return 0;
1989 }
1990
1991 int ll_flush_ctx(struct inode *inode)
1992 {
1993         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1994
1995         CDEBUG(D_SEC, "flush context for user %d\n",
1996                       from_kuid(&init_user_ns, current_uid()));
1997
1998         obd_set_info_async(NULL, sbi->ll_md_exp,
1999                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2000                            0, NULL, NULL);
2001         obd_set_info_async(NULL, sbi->ll_dt_exp,
2002                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2003                            0, NULL, NULL);
2004         return 0;
2005 }
2006
2007 /* umount -f client means force down, don't save state */
2008 void ll_umount_begin(struct super_block *sb)
2009 {
2010         struct ll_sb_info *sbi = ll_s2sbi(sb);
2011         struct obd_device *obd;
2012         struct obd_ioctl_data *ioc_data;
2013
2014         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2015                sb->s_count, atomic_read(&sb->s_active));
2016
2017         obd = class_exp2obd(sbi->ll_md_exp);
2018         if (obd == NULL) {
2019                 CERROR("Invalid MDC connection handle "LPX64"\n",
2020                        sbi->ll_md_exp->exp_handle.h_cookie);
2021                 return;
2022         }
2023         obd->obd_force = 1;
2024
2025         obd = class_exp2obd(sbi->ll_dt_exp);
2026         if (obd == NULL) {
2027                 CERROR("Invalid LOV connection handle "LPX64"\n",
2028                        sbi->ll_dt_exp->exp_handle.h_cookie);
2029                 return;
2030         }
2031         obd->obd_force = 1;
2032
2033         OBD_ALLOC_PTR(ioc_data);
2034         if (ioc_data) {
2035                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2036                               sizeof(*ioc_data), ioc_data, NULL);
2037
2038                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2039                               sizeof(*ioc_data), ioc_data, NULL);
2040
2041                 OBD_FREE_PTR(ioc_data);
2042         }
2043
2044         /* Really, we'd like to wait until there are no requests outstanding,
2045          * and then continue.  For now, we just invalidate the requests,
2046          * schedule() and sleep one second if needed, and hope.
2047          */
2048         schedule();
2049 }
2050
2051 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2052 {
2053         struct ll_sb_info *sbi = ll_s2sbi(sb);
2054         char *profilenm = get_profile_name(sb);
2055         int err;
2056         __u32 read_only;
2057
2058         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2059                 read_only = *flags & MS_RDONLY;
2060                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2061                                          sizeof(KEY_READ_ONLY),
2062                                          KEY_READ_ONLY, sizeof(read_only),
2063                                          &read_only, NULL);
2064                 if (err) {
2065                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2066                                       profilenm, read_only ?
2067                                       "read-only" : "read-write", err);
2068                         return err;
2069                 }
2070
2071                 if (read_only)
2072                         sb->s_flags |= MS_RDONLY;
2073                 else
2074                         sb->s_flags &= ~MS_RDONLY;
2075
2076                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2077                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2078                                       read_only ?  "read-only" : "read-write");
2079         }
2080         return 0;
2081 }
2082
2083 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2084                   struct super_block *sb, struct lookup_intent *it)
2085 {
2086         struct ll_sb_info *sbi = NULL;
2087         struct lustre_md md;
2088         int rc;
2089
2090         LASSERT(*inode || sb);
2091         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2092         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2093                               sbi->ll_md_exp, &md);
2094         if (rc)
2095                 return rc;
2096
2097         if (*inode) {
2098                 ll_update_inode(*inode, &md);
2099         } else {
2100                 LASSERT(sb != NULL);
2101
2102                 /*
2103                  * At this point server returns to client's same fid as client
2104                  * generated for creating. So using ->fid1 is okay here.
2105                  */
2106                 LASSERT(fid_is_sane(&md.body->fid1));
2107
2108                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2109                                              sbi->ll_flags & LL_SBI_32BIT_API),
2110                                  &md);
2111                 if (*inode == NULL || IS_ERR(*inode)) {
2112 #ifdef CONFIG_FS_POSIX_ACL
2113                         if (md.posix_acl) {
2114                                 posix_acl_release(md.posix_acl);
2115                                 md.posix_acl = NULL;
2116                         }
2117 #endif
2118                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2119                         *inode = NULL;
2120                         CERROR("new_inode -fatal: rc %d\n", rc);
2121                         GOTO(out, rc);
2122                 }
2123         }
2124
2125         /* Handling piggyback layout lock.
2126          * Layout lock can be piggybacked by getattr and open request.
2127          * The lsm can be applied to inode only if it comes with a layout lock
2128          * otherwise correct layout may be overwritten, for example:
2129          * 1. proc1: mdt returns a lsm but not granting layout
2130          * 2. layout was changed by another client
2131          * 3. proc2: refresh layout and layout lock granted
2132          * 4. proc1: to apply a stale layout */
2133         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2134                 struct lustre_handle lockh;
2135                 struct ldlm_lock *lock;
2136
2137                 lockh.cookie = it->d.lustre.it_lock_handle;
2138                 lock = ldlm_handle2lock(&lockh);
2139                 LASSERT(lock != NULL);
2140                 if (ldlm_has_layout(lock)) {
2141                         struct cl_object_conf conf;
2142
2143                         memset(&conf, 0, sizeof(conf));
2144                         conf.coc_opc = OBJECT_CONF_SET;
2145                         conf.coc_inode = *inode;
2146                         conf.coc_lock = lock;
2147                         conf.u.coc_md = &md;
2148                         (void)ll_layout_conf(*inode, &conf);
2149                 }
2150                 LDLM_LOCK_PUT(lock);
2151         }
2152
2153 out:
2154         if (md.lsm != NULL)
2155                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2156         md_free_lustre_md(sbi->ll_md_exp, &md);
2157         return rc;
2158 }
2159
2160 int ll_obd_statfs(struct inode *inode, void *arg)
2161 {
2162         struct ll_sb_info *sbi = NULL;
2163         struct obd_export *exp;
2164         char *buf = NULL;
2165         struct obd_ioctl_data *data = NULL;
2166         __u32 type;
2167         __u32 flags;
2168         int len = 0, rc;
2169
2170         if (!inode || !(sbi = ll_i2sbi(inode)))
2171                 GOTO(out_statfs, rc = -EINVAL);
2172
2173         rc = obd_ioctl_getdata(&buf, &len, arg);
2174         if (rc)
2175                 GOTO(out_statfs, rc);
2176
2177         data = (void*)buf;
2178         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2179             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2180                 GOTO(out_statfs, rc = -EINVAL);
2181
2182         if (data->ioc_inllen1 != sizeof(__u32) ||
2183             data->ioc_inllen2 != sizeof(__u32) ||
2184             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2185             data->ioc_plen2 != sizeof(struct obd_uuid))
2186                 GOTO(out_statfs, rc = -EINVAL);
2187
2188         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2189         if (type & LL_STATFS_LMV)
2190                 exp = sbi->ll_md_exp;
2191         else if (type & LL_STATFS_LOV)
2192                 exp = sbi->ll_dt_exp;
2193         else
2194                 GOTO(out_statfs, rc = -ENODEV);
2195
2196         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2197         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2198         if (rc)
2199                 GOTO(out_statfs, rc);
2200 out_statfs:
2201         if (buf)
2202                 obd_ioctl_freedata(buf, len);
2203         return rc;
2204 }
2205
2206 int ll_process_config(struct lustre_cfg *lcfg)
2207 {
2208         char *ptr;
2209         void *sb;
2210         struct lprocfs_static_vars lvars;
2211         unsigned long x;
2212         int rc = 0;
2213
2214         lprocfs_llite_init_vars(&lvars);
2215
2216         /* The instance name contains the sb: lustre-client-aacfe000 */
2217         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2218         if (!ptr || !*(++ptr))
2219                 return -EINVAL;
2220         if (sscanf(ptr, "%lx", &x) != 1)
2221                 return -EINVAL;
2222         sb = (void *)x;
2223         /* This better be a real Lustre superblock! */
2224         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2225
2226         /* Note we have not called client_common_fill_super yet, so
2227            proc fns must be able to handle that! */
2228         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2229                                       lcfg, sb);
2230         if (rc > 0)
2231                 rc = 0;
2232         return(rc);
2233 }
2234
2235 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2236 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2237                                        struct inode *i1, struct inode *i2,
2238                                        const char *name, int namelen,
2239                                        int mode, __u32 opc, void *data)
2240 {
2241         LASSERT(i1 != NULL);
2242
2243         if (namelen > ll_i2sbi(i1)->ll_namelen)
2244                 return ERR_PTR(-ENAMETOOLONG);
2245
2246         if (op_data == NULL)
2247                 OBD_ALLOC_PTR(op_data);
2248
2249         if (op_data == NULL)
2250                 return ERR_PTR(-ENOMEM);
2251
2252         ll_i2gids(op_data->op_suppgids, i1, i2);
2253         op_data->op_fid1 = *ll_inode2fid(i1);
2254         op_data->op_capa1 = ll_mdscapa_get(i1);
2255
2256         if (i2) {
2257                 op_data->op_fid2 = *ll_inode2fid(i2);
2258                 op_data->op_capa2 = ll_mdscapa_get(i2);
2259         } else {
2260                 fid_zero(&op_data->op_fid2);
2261                 op_data->op_capa2 = NULL;
2262         }
2263
2264         op_data->op_name = name;
2265         op_data->op_namelen = namelen;
2266         op_data->op_mode = mode;
2267         op_data->op_mod_time = cfs_time_current_sec();
2268         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2269         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2270         op_data->op_cap = cfs_curproc_cap_pack();
2271         op_data->op_bias = 0;
2272         op_data->op_cli_flags = 0;
2273         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2274              filename_is_volatile(name, namelen, NULL))
2275                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2276         op_data->op_opc = opc;
2277         op_data->op_mds = 0;
2278         op_data->op_data = data;
2279
2280         /* If the file is being opened after mknod() (normally due to NFS)
2281          * try to use the default stripe data from parent directory for
2282          * allocating OST objects.  Try to pass the parent FID to MDS. */
2283         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2284             !ll_i2info(i2)->lli_has_smd) {
2285                 struct ll_inode_info *lli = ll_i2info(i2);
2286
2287                 spin_lock(&lli->lli_lock);
2288                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2289                         op_data->op_fid1 = lli->lli_pfid;
2290                 spin_unlock(&lli->lli_lock);
2291                 /** We ignore parent's capability temporary. */
2292         }
2293
2294         /* When called by ll_setattr_raw, file is i1. */
2295         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2296                 op_data->op_bias |= MDS_DATA_MODIFIED;
2297
2298         return op_data;
2299 }
2300
2301 void ll_finish_md_op_data(struct md_op_data *op_data)
2302 {
2303         capa_put(op_data->op_capa1);
2304         capa_put(op_data->op_capa2);
2305         OBD_FREE_PTR(op_data);
2306 }
2307
2308 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2309 {
2310         struct ll_sb_info *sbi;
2311
2312         LASSERT((seq != NULL) && (dentry != NULL));
2313         sbi = ll_s2sbi(dentry->d_sb);
2314
2315         if (sbi->ll_flags & LL_SBI_NOLCK)
2316                 seq_puts(seq, ",nolock");
2317
2318         if (sbi->ll_flags & LL_SBI_FLOCK)
2319                 seq_puts(seq, ",flock");
2320
2321         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2322                 seq_puts(seq, ",localflock");
2323
2324         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2325                 seq_puts(seq, ",user_xattr");
2326
2327         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2328                 seq_puts(seq, ",lazystatfs");
2329
2330         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2331                 seq_puts(seq, ",user_fid2path");
2332
2333         return 0;
2334 }
2335
2336 /**
2337  * Get obd name by cmd, and copy out to user space
2338  */
2339 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2340 {
2341         struct ll_sb_info *sbi = ll_i2sbi(inode);
2342         struct obd_device *obd;
2343
2344         if (cmd == OBD_IOC_GETDTNAME)
2345                 obd = class_exp2obd(sbi->ll_dt_exp);
2346         else if (cmd == OBD_IOC_GETMDNAME)
2347                 obd = class_exp2obd(sbi->ll_md_exp);
2348         else
2349                 return -EINVAL;
2350
2351         if (!obd)
2352                 return -ENOENT;
2353
2354         if (copy_to_user((void *)arg, obd->obd_name,
2355                              strlen(obd->obd_name) + 1))
2356                 return -EFAULT;
2357
2358         return 0;
2359 }
2360
2361 /**
2362  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2363  * fsname will be returned in this buffer; otherwise, a static buffer will be
2364  * used to store the fsname and returned to caller.
2365  */
2366 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2367 {
2368         static char fsname_static[MTI_NAME_MAXLEN];
2369         struct lustre_sb_info *lsi = s2lsi(sb);
2370         char *ptr;
2371         int len;
2372
2373         if (buf == NULL) {
2374                 /* this means the caller wants to use static buffer
2375                  * and it doesn't care about race. Usually this is
2376                  * in error reporting path */
2377                 buf = fsname_static;
2378                 buflen = sizeof(fsname_static);
2379         }
2380
2381         len = strlen(lsi->lsi_lmd->lmd_profile);
2382         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2383         if (ptr && (strcmp(ptr, "-client") == 0))
2384                 len -= 7;
2385
2386         if (unlikely(len >= buflen))
2387                 len = buflen - 1;
2388         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2389         buf[len] = '\0';
2390
2391         return buf;
2392 }
2393
2394 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2395 {
2396         char *path = NULL;
2397
2398         struct path p;
2399
2400         p.dentry = dentry;
2401         p.mnt = current->fs->root.mnt;
2402         path_get(&p);
2403         path = d_path(&p, buf, bufsize);
2404         path_put(&p);
2405
2406         return path;
2407 }
2408
2409 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2410 {
2411         char *buf, *path = NULL;
2412         struct dentry *dentry = NULL;
2413         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2414
2415         /* this can be called inside spin lock so use GFP_ATOMIC. */
2416         buf = (char *)__get_free_page(GFP_ATOMIC);
2417         if (buf != NULL) {
2418                 dentry = d_find_alias(page->mapping->host);
2419                 if (dentry != NULL)
2420                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2421         }
2422
2423         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2424               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2425               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2426               PFID(&obj->cob_header.coh_lu.loh_fid),
2427               (path && !IS_ERR(path)) ? path : "", ioret);
2428
2429         if (dentry != NULL)
2430                 dput(dentry);
2431
2432         if (buf != NULL)
2433                 free_page((unsigned long)buf);
2434 }