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