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/version.h>
  46 #include <linux/mm.h>
  47
  48 #include <lustre_lite.h>
  49 #include <lustre_ha.h>
  50 #include <lustre_dlm.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_disk.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55 #include <cl_object.h>
  56 #include <obd_cksum.h>
  57 #include "llite_internal.h"
  58
  59 cfs_mem_cache_t *ll_file_data_slab;
  60
  61 CFS_LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82         ENTRY;
  83
  84         OBD_ALLOC(sbi, sizeof(*sbi));
  85         if (!sbi)
  86                 RETURN(NULL);
  87
  88         spin_lock_init(&sbi->ll_lock);
  89         mutex_init(&sbi->ll_lco.lco_lock);
  90         spin_lock_init(&sbi->ll_pp_extent_lock);
  91         spin_lock_init(&sbi->ll_process_lock);
  92         sbi->ll_rw_stats_on = 0;
  93
  94         si_meminfo(&si);
  95         pages = si.totalram - si.totalhigh;
  96         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
  97                 lru_page_max = pages / 2;
  98         } else {
  99                 lru_page_max = (pages / 4) * 3;
 100         }
 101
 102         /* initialize ll_cache data */
 103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 104         sbi->ll_cache.ccc_lru_max = lru_page_max;
 105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 108
 109         cfs_atomic_set(&sbi->ll_cache.ccc_unstable_nr, 0);
 110         cfs_waitq_init(&sbi->ll_cache.ccc_unstable_waitq);
 111
 112         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 113                                            SBI_DEFAULT_READAHEAD_MAX);
 114         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 115         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 116                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 117         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 118         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 119
 120         ll_generate_random_uuid(uuid);
 121         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 122         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 123
 124         spin_lock(&ll_sb_lock);
 125         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 126         spin_unlock(&ll_sb_lock);
 127
 128         sbi->ll_flags |= LL_SBI_VERBOSE;
 129 #ifdef ENABLE_CHECKSUM
 130         sbi->ll_flags |= LL_SBI_CHECKSUM;
 131 #endif
 132
 133 #ifdef HAVE_LRU_RESIZE_SUPPORT
 134         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 135 #endif
 136
 137         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 138                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 139                                pp_r_hist.oh_lock);
 140                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 141                                pp_w_hist.oh_lock);
 142         }
 143
 144         /* metadata statahead is enabled by default */
 145         sbi->ll_sa_max = LL_SA_RPC_DEF;
 146         cfs_atomic_set(&sbi->ll_sa_total, 0);
 147         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 148         cfs_atomic_set(&sbi->ll_agl_total, 0);
 149         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 150
 151         RETURN(sbi);
 152 }
 153
 154 void ll_free_sbi(struct super_block *sb)
 155 {
 156         struct ll_sb_info *sbi = ll_s2sbi(sb);
 157         ENTRY;
 158
 159         if (sbi != NULL) {
 160                 spin_lock(&ll_sb_lock);
 161                 cfs_list_del(&sbi->ll_list);
 162                 spin_unlock(&ll_sb_lock);
 163                 OBD_FREE(sbi, sizeof(*sbi));
 164         }
 165         EXIT;
 166 }
 167
 168 static struct dentry_operations ll_d_root_ops = {
 169         .d_compare = ll_dcompare,
 170         .d_revalidate = ll_revalidate_nd,
 171 };
 172
 173 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 174                                     struct vfsmount *mnt)
 175 {
 176         struct inode *root = 0;
 177         struct ll_sb_info *sbi = ll_s2sbi(sb);
 178         struct obd_device *obd;
 179         struct obd_capa *oc = NULL;
 180         struct obd_statfs *osfs = NULL;
 181         struct ptlrpc_request *request = NULL;
 182         struct obd_connect_data *data = NULL;
 183         struct obd_uuid *uuid;
 184         struct md_op_data *op_data;
 185         struct lustre_md lmd;
 186         obd_valid valid;
 187         int size, err, checksum;
 188         ENTRY;
 189
 190         obd = class_name2obd(md);
 191         if (!obd) {
 192                 CERROR("MD %s: not setup or attached\n", md);
 193                 RETURN(-EINVAL);
 194         }
 195
 196         OBD_ALLOC_PTR(data);
 197         if (data == NULL)
 198                 RETURN(-ENOMEM);
 199
 200         OBD_ALLOC_PTR(osfs);
 201         if (osfs == NULL) {
 202                 OBD_FREE_PTR(data);
 203                 RETURN(-ENOMEM);
 204         }
 205
 206         if (proc_lustre_fs_root) {
 207                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 208                                                   dt, md);
 209                 if (err < 0)
 210                         CERROR("could not register mount in /proc/fs/lustre\n");
 211         }
 212
 213         /* indicate the features supported by this client */
 214         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 215                                   OBD_CONNECT_ATTRFID  |
 216                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 217                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 218                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 219                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 220                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 221                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 222                                   OBD_CONNECT_EINPROGRESS |
 223                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 224                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 225
 226         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 227                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 228
 229 #ifdef HAVE_LRU_RESIZE_SUPPORT
 230         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 231                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 232 #endif
 233 #ifdef CONFIG_FS_POSIX_ACL
 234         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 235 #endif
 236
 237         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 238                 /* flag mdc connection as lightweight, only used for test
 239                  * purpose, use with care */
 240                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 241
 242         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 243         data->ocd_version = LUSTRE_VERSION_CODE;
 244
 245         if (sb->s_flags & MS_RDONLY)
 246                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 247         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 248                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 249
 250 #ifdef HAVE_MS_FLOCK_LOCK
 251         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 252         sb->s_flags |= MS_FLOCK_LOCK;
 253 #endif
 254 #ifdef MS_HAS_NEW_AOPS
 255         sb->s_flags |= MS_HAS_NEW_AOPS;
 256 #endif
 257
 258         if (sbi->ll_flags & LL_SBI_FLOCK)
 259                 sbi->ll_fop = &ll_file_operations_flock;
 260         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 261                 sbi->ll_fop = &ll_file_operations;
 262         else
 263                 sbi->ll_fop = &ll_file_operations_noflock;
 264
 265         /* real client */
 266         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 267         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 268                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 269
 270         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 271
 272         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 273         if (err == -EBUSY) {
 274                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 275                                    "recovery, of which this client is not a "
 276                                    "part. Please wait for recovery to complete,"
 277                                    " abort, or time out.\n", md);
 278                 GOTO(out, err);
 279         } else if (err) {
 280                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 281                 GOTO(out, err);
 282         }
 283
 284         sbi->ll_md_exp->exp_connect_data = *data;
 285
 286         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 287                            LUSTRE_SEQ_METADATA);
 288         if (err) {
 289                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 290                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 291                 GOTO(out_md, err);
 292         }
 293
 294         /* For mount, we only need fs info from MDT0, and also in DNE, it
 295          * can make sure the client can be mounted as long as MDT0 is
 296          * avaible */
 297         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 298                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 299                         OBD_STATFS_FOR_MDT0);
 300         if (err)
 301                 GOTO(out_md_fid, err);
 302
 303         /* This needs to be after statfs to ensure connect has finished.
 304          * Note that "data" does NOT contain the valid connect reply.
 305          * If connecting to a 1.8 server there will be no LMV device, so
 306          * we can access the MDC export directly and exp_connect_flags will
 307          * be non-zero, but if accessing an upgraded 2.1 server it will
 308          * have the correct flags filled in.
 309          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 310         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 311         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 312             valid != CLIENT_CONNECT_MDT_REQD) {
 313                 char *buf;
 314
 315                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 316                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
 317                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 318                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 319                                    "feature(s) needed for correct operation "
 320                                    "of this client (%s). Please upgrade "
 321                                    "server or downgrade client.\n",
 322                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 323                 OBD_FREE(buf, CFS_PAGE_SIZE);
 324                 GOTO(out_md_fid, err = -EPROTO);
 325         }
 326
 327         size = sizeof(*data);
 328         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 329                            KEY_CONN_DATA,  &size, data, NULL);
 330         if (err) {
 331                 CERROR("%s: Get connect data failed: rc = %d\n",
 332                        sbi->ll_md_exp->exp_obd->obd_name, err);
 333                 GOTO(out_md_fid, err);
 334         }
 335
 336         LASSERT(osfs->os_bsize);
 337         sb->s_blocksize = osfs->os_bsize;
 338         sb->s_blocksize_bits = log2(osfs->os_bsize);
 339         sb->s_magic = LL_SUPER_MAGIC;
 340         sb->s_maxbytes = MAX_LFS_FILESIZE;
 341         sbi->ll_namelen = osfs->os_namelen;
 342         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 343
 344         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 345             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 346                 LCONSOLE_INFO("Disabling user_xattr feature because "
 347                               "it is not supported on the server\n");
 348                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 349         }
 350
 351         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 352 #ifdef MS_POSIXACL
 353                 sb->s_flags |= MS_POSIXACL;
 354 #endif
 355                 sbi->ll_flags |= LL_SBI_ACL;
 356         } else {
 357                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 358 #ifdef MS_POSIXACL
 359                 sb->s_flags &= ~MS_POSIXACL;
 360 #endif
 361                 sbi->ll_flags &= ~LL_SBI_ACL;
 362         }
 363
 364         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 365                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 366                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 367                         LCONSOLE_INFO("client is set as remote by default.\n");
 368                 }
 369         } else {
 370                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 371                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 372                         LCONSOLE_INFO("client claims to be remote, but server "
 373                                       "rejected, forced to be local.\n");
 374                 }
 375         }
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 378                 LCONSOLE_INFO("client enabled MDS capability!\n");
 379                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 380         }
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 383                 LCONSOLE_INFO("client enabled OSS capability!\n");
 384                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 385         }
 386
 387         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 388                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 389
 390         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 391                 sbi->ll_md_brw_size = data->ocd_brw_size;
 392         else
 393                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
 394
 395         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 396                 LCONSOLE_INFO("Layout lock feature supported.\n");
 397                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 398         }
 399
 400         obd = class_name2obd(dt);
 401         if (!obd) {
 402                 CERROR("DT %s: not setup or attached\n", dt);
 403                 GOTO(out_md_fid, err = -ENODEV);
 404         }
 405
 406         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 407                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 408                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 409                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 410                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 411                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 412                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 413                                   OBD_CONNECT_MAXBYTES |
 414                                   OBD_CONNECT_EINPROGRESS |
 415                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 416                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 417
 418         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 419                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 420
 421         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 422                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 423                  * disabled by default, because it can still be enabled on the
 424                  * fly via /proc. As a consequence, we still need to come to an
 425                  * agreement on the supported algorithms at connect time */
 426                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 427
 428                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 429                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 430                 else
 431                         data->ocd_cksum_types = cksum_types_supported_client();
 432         }
 433
 434 #ifdef HAVE_LRU_RESIZE_SUPPORT
 435         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 436 #endif
 437         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 438                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 439
 440         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 441                "ocd_grant: %d\n", data->ocd_connect_flags,
 442                data->ocd_version, data->ocd_grant);
 443
 444         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 445         obd->obd_upcall.onu_upcall = cl_ocd_update;
 446
 447         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 448
 449         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 450                           NULL);
 451         if (err == -EBUSY) {
 452                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 453                                    "recovery, of which this client is not a "
 454                                    "part.  Please wait for recovery to "
 455                                    "complete, abort, or time out.\n", dt);
 456                 GOTO(out_md, err);
 457         } else if (err) {
 458                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 459                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 460                 GOTO(out_md, err);
 461         }
 462
 463         sbi->ll_dt_exp->exp_connect_data = *data;
 464
 465         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 466                            LUSTRE_SEQ_METADATA);
 467         if (err) {
 468                 CERROR("%s: Can't init data layer FID infrastructure, "
 469                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 470                 GOTO(out_dt, err);
 471         }
 472
 473         mutex_lock(&sbi->ll_lco.lco_lock);
 474         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 475         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 476         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 477         mutex_unlock(&sbi->ll_lco.lco_lock);
 478
 479         fid_zero(&sbi->ll_root_fid);
 480         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 481         if (err) {
 482                 CERROR("cannot mds_connect: rc = %d\n", err);
 483                 GOTO(out_lock_cn_cb, err);
 484         }
 485         if (!fid_is_sane(&sbi->ll_root_fid)) {
 486                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 487                        sbi->ll_md_exp->exp_obd->obd_name,
 488                        PFID(&sbi->ll_root_fid));
 489                 GOTO(out_lock_cn_cb, err = -EINVAL);
 490         }
 491         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 492
 493         sb->s_op = &lustre_super_operations;
 494 #if THREAD_SIZE >= 8192 /*b=17630*/
 495         sb->s_export_op = &lustre_export_operations;
 496 #endif
 497
 498         /* make root inode
 499          * XXX: move this to after cbd setup? */
 500         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 501         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 502                 valid |= OBD_MD_FLRMTPERM;
 503         else if (sbi->ll_flags & LL_SBI_ACL)
 504                 valid |= OBD_MD_FLACL;
 505
 506         OBD_ALLOC_PTR(op_data);
 507         if (op_data == NULL)
 508                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 509
 510         op_data->op_fid1 = sbi->ll_root_fid;
 511         op_data->op_mode = 0;
 512         op_data->op_capa1 = oc;
 513         op_data->op_valid = valid;
 514
 515         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 516         if (oc)
 517                 capa_put(oc);
 518         OBD_FREE_PTR(op_data);
 519         if (err) {
 520                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 521                        sbi->ll_md_exp->exp_obd->obd_name, err);
 522                 GOTO(out_lock_cn_cb, err);
 523         }
 524
 525         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 526                                sbi->ll_md_exp, &lmd);
 527         if (err) {
 528                 CERROR("failed to understand root inode md: rc = %d\n", err);
 529                 ptlrpc_req_finished(request);
 530                 GOTO(out_lock_cn_cb, err);
 531         }
 532
 533         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 534         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 535                                             ll_need_32bit_api(sbi)),
 536                        &lmd);
 537         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 538         ptlrpc_req_finished(request);
 539
 540         if (root == NULL || IS_ERR(root)) {
 541                 if (lmd.lsm)
 542                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 543 #ifdef CONFIG_FS_POSIX_ACL
 544                 if (lmd.posix_acl) {
 545                         posix_acl_release(lmd.posix_acl);
 546                         lmd.posix_acl = NULL;
 547                 }
 548 #endif
 549                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 550                 root = NULL;
 551                 CERROR("lustre_lite: bad iget4 for root\n");
 552                 GOTO(out_root, err);
 553         }
 554
 555         err = ll_close_thread_start(&sbi->ll_lcq);
 556         if (err) {
 557                 CERROR("cannot start close thread: rc %d\n", err);
 558                 GOTO(out_root, err);
 559         }
 560
 561 #ifdef CONFIG_FS_POSIX_ACL
 562         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 563                 rct_init(&sbi->ll_rct);
 564                 et_init(&sbi->ll_et);
 565         }
 566 #endif
 567
 568         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 569         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 570                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 571                                  NULL);
 572         cl_sb_init(sb);
 573
 574         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 575                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 576                                  &sbi->ll_cache, NULL);
 577
 578         sb->s_root = d_make_root(root);
 579         if (sb->s_root == NULL) {
 580                 CERROR("%s: can't make root dentry\n",
 581                         ll_get_fsname(sb, NULL, 0));
 582                 GOTO(out_root, err = -ENOMEM);
 583         }
 584
 585 #ifdef HAVE_DCACHE_LOCK
 586         sb->s_root->d_op = &ll_d_root_ops;
 587 #else
 588         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 589         d_set_d_op(sb->s_root, &ll_d_root_ops);
 590         sb->s_d_op = &ll_d_ops;
 591 #endif
 592
 593         sbi->ll_sdev_orig = sb->s_dev;
 594
 595         /* We set sb->s_dev equal on all lustre clients in order to support
 596          * NFS export clustering.  NFSD requires that the FSID be the same
 597          * on all clients. */
 598         /* s_dev is also used in lt_compare() to compare two fs, but that is
 599          * only a node-local comparison. */
 600         uuid = obd_get_uuid(sbi->ll_md_exp);
 601         if (uuid != NULL)
 602                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 603
 604         if (data != NULL)
 605                 OBD_FREE_PTR(data);
 606         if (osfs != NULL)
 607                 OBD_FREE_PTR(osfs);
 608
 609         RETURN(err);
 610 out_root:
 611         if (root)
 612                 iput(root);
 613 out_lock_cn_cb:
 614         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 615 out_dt:
 616         obd_disconnect(sbi->ll_dt_exp);
 617         sbi->ll_dt_exp = NULL;
 618         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 619         obd_zombie_barrier();
 620 out_md_fid:
 621         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 622 out_md:
 623         obd_disconnect(sbi->ll_md_exp);
 624         sbi->ll_md_exp = NULL;
 625 out:
 626         if (data != NULL)
 627                 OBD_FREE_PTR(data);
 628         if (osfs != NULL)
 629                 OBD_FREE_PTR(osfs);
 630         lprocfs_unregister_mountpoint(sbi);
 631         return err;
 632 }
 633
 634 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 635 {
 636         int size, rc;
 637
 638         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 639         size = sizeof(int);
 640         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 641                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 642         if (rc)
 643                 CERROR("Get max mdsize error rc %d \n", rc);
 644
 645         RETURN(rc);
 646 }
 647
 648 void ll_dump_inode(struct inode *inode)
 649 {
 650         struct ll_d_hlist_node *tmp;
 651         int dentry_count = 0;
 652
 653         LASSERT(inode != NULL);
 654
 655         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 656                 dentry_count++;
 657
 658         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 659                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 660                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 661 }
 662
 663 void lustre_dump_dentry(struct dentry *dentry, int recur)
 664 {
 665         struct list_head *tmp;
 666         int subdirs = 0;
 667
 668         LASSERT(dentry != NULL);
 669
 670         list_for_each(tmp, &dentry->d_subdirs)
 671                 subdirs++;
 672
 673         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 674                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 675                dentry->d_name.len, dentry->d_name.name,
 676                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 677                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 678                dentry->d_flags, dentry->d_fsdata, subdirs);
 679         if (dentry->d_inode != NULL)
 680                 ll_dump_inode(dentry->d_inode);
 681
 682         if (recur == 0)
 683                 return;
 684
 685         list_for_each(tmp, &dentry->d_subdirs) {
 686                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 687                 lustre_dump_dentry(d, recur - 1);
 688         }
 689 }
 690
 691 void client_common_put_super(struct super_block *sb)
 692 {
 693         struct ll_sb_info *sbi = ll_s2sbi(sb);
 694         ENTRY;
 695
 696 #ifdef CONFIG_FS_POSIX_ACL
 697         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 698                 et_fini(&sbi->ll_et);
 699                 rct_fini(&sbi->ll_rct);
 700         }
 701 #endif
 702
 703         ll_close_thread_shutdown(sbi->ll_lcq);
 704
 705         cl_sb_fini(sb);
 706
 707         cfs_list_del(&sbi->ll_conn_chain);
 708
 709         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 710         obd_disconnect(sbi->ll_dt_exp);
 711         sbi->ll_dt_exp = NULL;
 712         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 713          * see LU-2543. */
 714         obd_zombie_barrier();
 715
 716         lprocfs_unregister_mountpoint(sbi);
 717
 718         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 719         obd_disconnect(sbi->ll_md_exp);
 720         sbi->ll_md_exp = NULL;
 721
 722         EXIT;
 723 }
 724
 725 void ll_kill_super(struct super_block *sb)
 726 {
 727         struct ll_sb_info *sbi;
 728
 729         ENTRY;
 730
 731         /* not init sb ?*/
 732         if (!(sb->s_flags & MS_ACTIVE))
 733                 return;
 734
 735         sbi = ll_s2sbi(sb);
 736         /* we need restore s_dev from changed for clustred NFS before put_super
 737          * because new kernels have cached s_dev and change sb->s_dev in
 738          * put_super not affected real removing devices */
 739         if (sbi)
 740                 sb->s_dev = sbi->ll_sdev_orig;
 741         EXIT;
 742 }
 743
 744 char *ll_read_opt(const char *opt, char *data)
 745 {
 746         char *value;
 747         char *retval;
 748         ENTRY;
 749
 750         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 751         if (strncmp(opt, data, strlen(opt)))
 752                 RETURN(NULL);
 753         if ((value = strchr(data, '=')) == NULL)
 754                 RETURN(NULL);
 755
 756         value++;
 757         OBD_ALLOC(retval, strlen(value) + 1);
 758         if (!retval) {
 759                 CERROR("out of memory!\n");
 760                 RETURN(NULL);
 761         }
 762
 763         memcpy(retval, value, strlen(value)+1);
 764         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 765         RETURN(retval);
 766 }
 767
 768 static inline int ll_set_opt(const char *opt, char *data, int fl)
 769 {
 770         if (strncmp(opt, data, strlen(opt)) != 0)
 771                 return(0);
 772         else
 773                 return(fl);
 774 }
 775
 776 /* non-client-specific mount options are parsed in lmd_parse */
 777 static int ll_options(char *options, int *flags)
 778 {
 779         int tmp;
 780         char *s1 = options, *s2;
 781         ENTRY;
 782
 783         if (!options)
 784                 RETURN(0);
 785
 786         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 787
 788         while (*s1) {
 789                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 790                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 791                 if (tmp) {
 792                         *flags |= tmp;
 793                         goto next;
 794                 }
 795                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 796                 if (tmp) {
 797                         *flags |= tmp;
 798                         goto next;
 799                 }
 800                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 801                 if (tmp) {
 802                         *flags |= tmp;
 803                         goto next;
 804                 }
 805                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 806                 if (tmp) {
 807                         *flags &= ~tmp;
 808                         goto next;
 809                 }
 810                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 811                 if (tmp) {
 812                         *flags |= tmp;
 813                         goto next;
 814                 }
 815                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 816                 if (tmp) {
 817                         *flags &= ~tmp;
 818                         goto next;
 819                 }
 820 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 821                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 822                 if (tmp) {
 823                         /* Ignore deprecated mount option.  The client will
 824                          * always try to mount with ACL support, whether this
 825                          * is used depends on whether server supports it. */
 826                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 827                                                   "mount option 'acl'.\n");
 828                         goto next;
 829                 }
 830                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 831                 if (tmp) {
 832                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 833                                                   "mount option 'noacl'.\n");
 834                         goto next;
 835                 }
 836 #else
 837 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 838 #endif
 839                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 840                 if (tmp) {
 841                         *flags |= tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 850                 if (tmp) {
 851                         *flags &= ~tmp;
 852                         goto next;
 853                 }
 854
 855                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 856                 if (tmp) {
 857                         *flags |= tmp;
 858                         goto next;
 859                 }
 860                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 861                 if (tmp) {
 862                         *flags &= ~tmp;
 863                         goto next;
 864                 }
 865                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 866                 if (tmp) {
 867                         *flags |= tmp;
 868                         goto next;
 869                 }
 870                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 871                 if (tmp) {
 872                         *flags &= ~tmp;
 873                         goto next;
 874                 }
 875                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 876                 if (tmp) {
 877                         *flags |= tmp;
 878                         goto next;
 879                 }
 880                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 881                 if (tmp) {
 882                         *flags &= ~tmp;
 883                         goto next;
 884                 }
 885                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 886                 if (tmp) {
 887                         *flags |= tmp;
 888                         goto next;
 889                 }
 890                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 891                 if (tmp) {
 892                         *flags |= tmp;
 893                         goto next;
 894                 }
 895                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 896                 if (tmp) {
 897                         *flags |= tmp;
 898                         goto next;
 899                 }
 900                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 901                 if (tmp) {
 902                         *flags &= ~tmp;
 903                         goto next;
 904                 }
 905                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 906                                    s1);
 907                 RETURN(-EINVAL);
 908
 909 next:
 910                 /* Find next opt */
 911                 s2 = strchr(s1, ',');
 912                 if (s2 == NULL)
 913                         break;
 914                 s1 = s2 + 1;
 915         }
 916         RETURN(0);
 917 }
 918
 919 void ll_lli_init(struct ll_inode_info *lli)
 920 {
 921         lli->lli_inode_magic = LLI_INODE_MAGIC;
 922         lli->lli_flags = 0;
 923         lli->lli_ioepoch = 0;
 924         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 925         spin_lock_init(&lli->lli_lock);
 926         lli->lli_posix_acl = NULL;
 927         lli->lli_remote_perms = NULL;
 928         mutex_init(&lli->lli_rmtperm_mutex);
 929         /* Do not set lli_fid, it has been initialized already. */
 930         fid_zero(&lli->lli_pfid);
 931         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 932         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 933         cfs_atomic_set(&lli->lli_open_count, 0);
 934         lli->lli_mds_capa = NULL;
 935         lli->lli_rmtperm_time = 0;
 936         lli->lli_pending_och = NULL;
 937         lli->lli_mds_read_och = NULL;
 938         lli->lli_mds_write_och = NULL;
 939         lli->lli_mds_exec_och = NULL;
 940         lli->lli_open_fd_read_count = 0;
 941         lli->lli_open_fd_write_count = 0;
 942         lli->lli_open_fd_exec_count = 0;
 943         mutex_init(&lli->lli_och_mutex);
 944         spin_lock_init(&lli->lli_agl_lock);
 945         lli->lli_has_smd = false;
 946         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 947         lli->lli_clob = NULL;
 948
 949         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 950         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 951                 mutex_init(&lli->lli_readdir_mutex);
 952                 lli->lli_opendir_key = NULL;
 953                 lli->lli_sai = NULL;
 954                 lli->lli_def_acl = NULL;
 955                 spin_lock_init(&lli->lli_sa_lock);
 956                 lli->lli_opendir_pid = 0;
 957         } else {
 958                 sema_init(&lli->lli_size_sem, 1);
 959                 lli->lli_size_sem_owner = NULL;
 960                 lli->lli_symlink_name = NULL;
 961                 init_rwsem(&lli->lli_trunc_sem);
 962                 mutex_init(&lli->lli_write_mutex);
 963                 init_rwsem(&lli->lli_glimpse_sem);
 964                 lli->lli_glimpse_time = 0;
 965                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 966                 lli->lli_agl_index = 0;
 967                 lli->lli_async_rc = 0;
 968                 lli->lli_volatile = false;
 969         }
 970         mutex_init(&lli->lli_layout_mutex);
 971 }
 972
 973 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 974 {
 975 #ifdef HAVE_BDI_REGISTER
 976         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 977
 978 #ifdef HAVE_BDI_NAME
 979         bdi->name = "lustre";
 980 #endif
 981         return bdi_register(bdi, NULL, "lustre-%d",
 982                             atomic_inc_return(&ll_bdi_num));
 983 #else
 984         return 0;
 985 #endif
 986 }
 987
 988 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 989 {
 990         struct lustre_profile *lprof = NULL;
 991         struct lustre_sb_info *lsi = s2lsi(sb);
 992         struct ll_sb_info *sbi;
 993         char  *dt = NULL, *md = NULL;
 994         char  *profilenm = get_profile_name(sb);
 995         struct config_llog_instance *cfg;
 996         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 997         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 998         int    err;
 999         ENTRY;
1000
1001         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1002
1003         OBD_ALLOC_PTR(cfg);
1004         if (cfg == NULL)
1005                 RETURN(-ENOMEM);
1006
1007         cfs_module_get();
1008
1009         /* client additional sb info */
1010         lsi->lsi_llsbi = sbi = ll_init_sbi();
1011         if (!sbi) {
1012                 cfs_module_put(THIS_MODULE);
1013                 OBD_FREE_PTR(cfg);
1014                 RETURN(-ENOMEM);
1015         }
1016
1017         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1018         if (err)
1019                 GOTO(out_free, err);
1020
1021         err = bdi_init(&lsi->lsi_bdi);
1022         if (err)
1023                 GOTO(out_free, err);
1024         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1025         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1026         err = ll_bdi_register(&lsi->lsi_bdi);
1027         if (err)
1028                 GOTO(out_free, err);
1029
1030 #ifdef HAVE_SB_BDI
1031         sb->s_bdi = &lsi->lsi_bdi;
1032 #endif
1033
1034         /* Generate a string unique to this super, in case some joker tries
1035            to mount the same fs at two mount points.
1036            Use the address of the super itself.*/
1037         cfg->cfg_instance = sb;
1038         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1039         cfg->cfg_callback = class_config_llog_handler;
1040         /* set up client obds */
1041         err = lustre_process_log(sb, profilenm, cfg);
1042         if (err < 0) {
1043                 CERROR("Unable to process log: %d\n", err);
1044                 GOTO(out_free, err);
1045         }
1046
1047         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1048         lprof = class_get_profile(profilenm);
1049         if (lprof == NULL) {
1050                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1051                                    " read from the MGS.  Does that filesystem "
1052                                    "exist?\n", profilenm);
1053                 GOTO(out_free, err = -EINVAL);
1054         }
1055         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1056                lprof->lp_md, lprof->lp_dt);
1057
1058         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1059         if (!dt)
1060                 GOTO(out_free, err = -ENOMEM);
1061         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1062
1063         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1064         if (!md)
1065                 GOTO(out_free, err = -ENOMEM);
1066         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1067
1068         /* connections, registrations, sb setup */
1069         err = client_common_fill_super(sb, md, dt, mnt);
1070
1071 out_free:
1072         if (md)
1073                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1074         if (dt)
1075                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1076         if (err)
1077                 ll_put_super(sb);
1078         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1079                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1080
1081         OBD_FREE_PTR(cfg);
1082         RETURN(err);
1083 } /* ll_fill_super */
1084
1085
1086 void lu_context_keys_dump(void);
1087
1088 void ll_put_super(struct super_block *sb)
1089 {
1090         struct config_llog_instance cfg;
1091         struct obd_device *obd;
1092         struct lustre_sb_info *lsi = s2lsi(sb);
1093         struct ll_sb_info *sbi = ll_s2sbi(sb);
1094         char *profilenm = get_profile_name(sb);
1095         int ccc_count, next, force = 1, rc = 0;
1096         ENTRY;
1097
1098         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1099
1100         ll_print_capa_stat(sbi);
1101
1102         cfg.cfg_instance = sb;
1103         lustre_end_log(sb, profilenm, &cfg);
1104
1105         if (sbi->ll_md_exp) {
1106                 obd = class_exp2obd(sbi->ll_md_exp);
1107                 if (obd)
1108                         force = obd->obd_force;
1109         }
1110
1111         /* Wait for unstable pages to be committed to stable storage */
1112         if (force == 0) {
1113                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1114                 rc = l_wait_event(sbi->ll_cache.ccc_unstable_waitq,
1115                         cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
1116                         &lwi);
1117         }
1118
1119         ccc_count = cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr);
1120         if (force == 0 && rc != -EINTR)
1121                 LASSERTF(ccc_count == 0, "count: %i\n", ccc_count);
1122
1123
1124         /* We need to set force before the lov_disconnect in
1125            lustre_common_put_super, since l_d cleans up osc's as well. */
1126         if (force) {
1127                 next = 0;
1128                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1129                                                      &next)) != NULL) {
1130                         obd->obd_force = force;
1131                 }
1132         }
1133
1134         if (sbi->ll_lcq) {
1135                 /* Only if client_common_fill_super succeeded */
1136                 client_common_put_super(sb);
1137         }
1138
1139         next = 0;
1140         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1141                 class_manual_cleanup(obd);
1142         }
1143
1144         if (sbi->ll_flags & LL_SBI_VERBOSE)
1145                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1146
1147         if (profilenm)
1148                 class_del_profile(profilenm);
1149
1150         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1151                 bdi_destroy(&lsi->lsi_bdi);
1152                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1153         }
1154
1155         ll_free_sbi(sb);
1156         lsi->lsi_llsbi = NULL;
1157
1158         lustre_common_put_super(sb);
1159
1160         cfs_module_put(THIS_MODULE);
1161
1162         EXIT;
1163 } /* client_put_super */
1164
1165 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1166 {
1167         struct inode *inode = NULL;
1168
1169         /* NOTE: we depend on atomic igrab() -bzzz */
1170         lock_res_and_lock(lock);
1171         if (lock->l_resource->lr_lvb_inode) {
1172                 struct ll_inode_info * lli;
1173                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1174                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1175                         inode = igrab(lock->l_resource->lr_lvb_inode);
1176                 } else {
1177                         inode = lock->l_resource->lr_lvb_inode;
1178                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1179                                          D_WARNING, lock, "lr_lvb_inode %p is "
1180                                          "bogus: magic %08x",
1181                                          lock->l_resource->lr_lvb_inode,
1182                                          lli->lli_inode_magic);
1183                         inode = NULL;
1184                 }
1185         }
1186         unlock_res_and_lock(lock);
1187         return inode;
1188 }
1189
1190 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1191 {
1192         struct inode *inode = NULL;
1193         /* NOTE: we depend on atomic igrab() -bzzz */
1194         lock_res_and_lock(lock);
1195         if (lock->l_ast_data) {
1196                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1197                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1198                         inode = igrab(lock->l_ast_data);
1199                 } else {
1200                         inode = lock->l_ast_data;
1201                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1202                                          D_WARNING, lock, "l_ast_data %p is "
1203                                          "bogus: magic %08x", lock->l_ast_data,
1204                                          lli->lli_inode_magic);
1205                         inode = NULL;
1206                 }
1207         }
1208         unlock_res_and_lock(lock);
1209         return inode;
1210 }
1211
1212 void ll_clear_inode(struct inode *inode)
1213 {
1214         struct ll_inode_info *lli = ll_i2info(inode);
1215         struct ll_sb_info *sbi = ll_i2sbi(inode);
1216         ENTRY;
1217
1218         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1219                inode->i_generation, inode);
1220
1221         if (S_ISDIR(inode->i_mode)) {
1222                 /* these should have been cleared in ll_file_release */
1223                 LASSERT(lli->lli_opendir_key == NULL);
1224                 LASSERT(lli->lli_sai == NULL);
1225                 LASSERT(lli->lli_opendir_pid == 0);
1226         }
1227
1228         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1229         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1230
1231         LASSERT(!lli->lli_open_fd_write_count);
1232         LASSERT(!lli->lli_open_fd_read_count);
1233         LASSERT(!lli->lli_open_fd_exec_count);
1234
1235         if (lli->lli_mds_write_och)
1236                 ll_md_real_close(inode, FMODE_WRITE);
1237         if (lli->lli_mds_exec_och)
1238                 ll_md_real_close(inode, FMODE_EXEC);
1239         if (lli->lli_mds_read_och)
1240                 ll_md_real_close(inode, FMODE_READ);
1241
1242         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1243                 OBD_FREE(lli->lli_symlink_name,
1244                          strlen(lli->lli_symlink_name) + 1);
1245                 lli->lli_symlink_name = NULL;
1246         }
1247
1248         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1249                 LASSERT(lli->lli_posix_acl == NULL);
1250                 if (lli->lli_remote_perms) {
1251                         free_rmtperm_hash(lli->lli_remote_perms);
1252                         lli->lli_remote_perms = NULL;
1253                 }
1254         }
1255 #ifdef CONFIG_FS_POSIX_ACL
1256         else if (lli->lli_posix_acl) {
1257                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1258                 LASSERT(lli->lli_remote_perms == NULL);
1259                 posix_acl_release(lli->lli_posix_acl);
1260                 lli->lli_posix_acl = NULL;
1261         }
1262 #endif
1263         lli->lli_inode_magic = LLI_INODE_DEAD;
1264
1265         ll_clear_inode_capas(inode);
1266         if (!S_ISDIR(inode->i_mode))
1267                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1268
1269         /*
1270          * XXX This has to be done before lsm is freed below, because
1271          * cl_object still uses inode lsm.
1272          */
1273         cl_inode_fini(inode);
1274         lli->lli_has_smd = false;
1275
1276         EXIT;
1277 }
1278
1279 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1280                   struct md_open_data **mod)
1281 {
1282         struct lustre_md md;
1283         struct inode *inode = dentry->d_inode;
1284         struct ll_sb_info *sbi = ll_i2sbi(inode);
1285         struct ptlrpc_request *request = NULL;
1286         int rc, ia_valid;
1287         ENTRY;
1288
1289         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1290                                      LUSTRE_OPC_ANY, NULL);
1291         if (IS_ERR(op_data))
1292                 RETURN(PTR_ERR(op_data));
1293
1294         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1295                         &request, mod);
1296         if (rc) {
1297                 ptlrpc_req_finished(request);
1298                 if (rc == -ENOENT) {
1299                         clear_nlink(inode);
1300                         /* Unlinked special device node? Or just a race?
1301                          * Pretend we done everything. */
1302                         if (!S_ISREG(inode->i_mode) &&
1303                             !S_ISDIR(inode->i_mode)) {
1304                                 ia_valid = op_data->op_attr.ia_valid;
1305                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1306                                 rc = simple_setattr(dentry, &op_data->op_attr);
1307                                 op_data->op_attr.ia_valid = ia_valid;
1308                         }
1309                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1310                         CERROR("md_setattr fails: rc = %d\n", rc);
1311                 }
1312                 RETURN(rc);
1313         }
1314
1315         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1316                               sbi->ll_md_exp, &md);
1317         if (rc) {
1318                 ptlrpc_req_finished(request);
1319                 RETURN(rc);
1320         }
1321
1322         ia_valid = op_data->op_attr.ia_valid;
1323         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1324          * cache is not cleared yet. */
1325         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1326         rc = simple_setattr(dentry, &op_data->op_attr);
1327         op_data->op_attr.ia_valid = ia_valid;
1328
1329         /* Extract epoch data if obtained. */
1330         op_data->op_handle = md.body->handle;
1331         op_data->op_ioepoch = md.body->ioepoch;
1332
1333         ll_update_inode(inode, &md);
1334         ptlrpc_req_finished(request);
1335
1336         RETURN(rc);
1337 }
1338
1339 /* Close IO epoch and send Size-on-MDS attribute update. */
1340 static int ll_setattr_done_writing(struct inode *inode,
1341                                    struct md_op_data *op_data,
1342                                    struct md_open_data *mod)
1343 {
1344         struct ll_inode_info *lli = ll_i2info(inode);
1345         int rc = 0;
1346         ENTRY;
1347
1348         LASSERT(op_data != NULL);
1349         if (!S_ISREG(inode->i_mode))
1350                 RETURN(0);
1351
1352         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1353                op_data->op_ioepoch, PFID(&lli->lli_fid));
1354
1355         op_data->op_flags = MF_EPOCH_CLOSE;
1356         ll_done_writing_attr(inode, op_data);
1357         ll_pack_inode2opdata(inode, op_data, NULL);
1358
1359         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1360         if (rc == -EAGAIN) {
1361                 /* MDS has instructed us to obtain Size-on-MDS attribute
1362                  * from OSTs and send setattr to back to MDS. */
1363                 rc = ll_som_update(inode, op_data);
1364         } else if (rc) {
1365                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1366                        inode->i_ino, rc);
1367         }
1368         RETURN(rc);
1369 }
1370
1371 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1372 {
1373         struct obd_capa *capa;
1374         int rc;
1375
1376         if (attr->ia_valid & ATTR_SIZE)
1377                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1378         else
1379                 capa = ll_mdscapa_get(inode);
1380
1381         rc = cl_setattr_ost(inode, attr, capa);
1382
1383         if (attr->ia_valid & ATTR_SIZE)
1384                 ll_truncate_free_capa(capa);
1385         else
1386                 capa_put(capa);
1387
1388         return rc;
1389 }
1390
1391 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1392 /**
1393  * inode_newsize_ok - may this inode be truncated to a given size
1394  * @inode:      the inode to be truncated
1395  * @offset:     the new size to assign to the inode
1396  * @Returns:    0 on success, -ve errno on failure
1397  *
1398  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1399  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1400  * when necessary. Caller must not proceed with inode size change if failure is
1401  * returned. @inode must be a file (not directory), with appropriate
1402  * permissions to allow truncate (inode_newsize_ok does NOT check these
1403  * conditions).
1404  *
1405  * inode_newsize_ok must be called with i_mutex held.
1406  */
1407 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1408 {
1409         if (inode->i_size < offset) {
1410                 unsigned long limit;
1411
1412                 limit = rlimit(RLIMIT_FSIZE);
1413                 if (limit != RLIM_INFINITY && offset > limit)
1414                         goto out_sig;
1415                 if (offset > inode->i_sb->s_maxbytes)
1416                         goto out_big;
1417         } else {
1418                 /*
1419                  * truncation of in-use swapfiles is disallowed - it would
1420                  * cause subsequent swapout to scribble on the now-freed
1421                  * blocks.
1422                  */
1423                 if (IS_SWAPFILE(inode))
1424                         return -ETXTBSY;
1425         }
1426
1427         return 0;
1428 out_sig:
1429         send_sig(SIGXFSZ, current, 0);
1430 out_big:
1431         return -EFBIG;
1432 }
1433 #endif
1434
1435 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1436  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1437  * keep these values until such a time that objects are allocated for it.
1438  * We do the MDS operations first, as it is checking permissions for us.
1439  * We don't to the MDS RPC if there is nothing that we want to store there,
1440  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1441  * going to do an RPC anyways.
1442  *
1443  * If we are doing a truncate, we will send the mtime and ctime updates
1444  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1445  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1446  * at the same time.
1447  */
1448 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1449 {
1450         struct inode *inode = dentry->d_inode;
1451         struct ll_inode_info *lli = ll_i2info(inode);
1452         struct md_op_data *op_data = NULL;
1453         struct md_open_data *mod = NULL;
1454         int rc = 0, rc1 = 0;
1455         ENTRY;
1456
1457         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1458                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1459                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1460                 attr->ia_valid);
1461
1462         if (attr->ia_valid & ATTR_SIZE) {
1463                 /* Check new size against VFS/VM file size limit and rlimit */
1464                 rc = inode_newsize_ok(inode, attr->ia_size);
1465                 if (rc)
1466                         RETURN(rc);
1467
1468                 /* The maximum Lustre file size is variable, based on the
1469                  * OST maximum object size and number of stripes.  This
1470                  * needs another check in addition to the VFS check above. */
1471                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1472                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1473                                PFID(&lli->lli_fid), attr->ia_size,
1474                                ll_file_maxbytes(inode));
1475                         RETURN(-EFBIG);
1476                 }
1477
1478                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1479         }
1480
1481         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1482         if (attr->ia_valid & TIMES_SET_FLAGS) {
1483                 if (cfs_curproc_fsuid() != inode->i_uid &&
1484                     !cfs_capable(CFS_CAP_FOWNER))
1485                         RETURN(-EPERM);
1486         }
1487
1488         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1489         if (attr->ia_valid & ATTR_CTIME) {
1490                 attr->ia_ctime = CFS_CURRENT_TIME;
1491                 attr->ia_valid |= ATTR_CTIME_SET;
1492         }
1493         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1494             (attr->ia_valid & ATTR_ATIME)) {
1495                 attr->ia_atime = CFS_CURRENT_TIME;
1496                 attr->ia_valid |= ATTR_ATIME_SET;
1497         }
1498         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1499             (attr->ia_valid & ATTR_MTIME)) {
1500                 attr->ia_mtime = CFS_CURRENT_TIME;
1501                 attr->ia_valid |= ATTR_MTIME_SET;
1502         }
1503
1504         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1505                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1506                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1507                        cfs_time_current_sec());
1508
1509         /* If we are changing file size, file content is modified, flag it. */
1510         if (attr->ia_valid & ATTR_SIZE) {
1511                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1512                 spin_lock(&lli->lli_lock);
1513                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1514                 spin_unlock(&lli->lli_lock);
1515         }
1516
1517         /* We always do an MDS RPC, even if we're only changing the size;
1518          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1519
1520         OBD_ALLOC_PTR(op_data);
1521         if (op_data == NULL)
1522                 RETURN(-ENOMEM);
1523
1524         if (!S_ISDIR(inode->i_mode)) {
1525                 if (attr->ia_valid & ATTR_SIZE)
1526                         inode_dio_write_done(inode);
1527                 mutex_unlock(&inode->i_mutex);
1528                 down_write(&lli->lli_trunc_sem);
1529         }
1530
1531         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1532
1533         /* Open epoch for truncate. */
1534         if (exp_connect_som(ll_i2mdexp(inode)) &&
1535             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1536                 op_data->op_flags = MF_EPOCH_OPEN;
1537
1538         rc = ll_md_setattr(dentry, op_data, &mod);
1539         if (rc)
1540                 GOTO(out, rc);
1541
1542         /* RPC to MDT is sent, cancel data modification flag */
1543         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1544                 spin_lock(&lli->lli_lock);
1545                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1546                 spin_unlock(&lli->lli_lock);
1547         }
1548
1549         ll_ioepoch_open(lli, op_data->op_ioepoch);
1550         if (!S_ISREG(inode->i_mode))
1551                 GOTO(out, rc = 0);
1552
1553         if (attr->ia_valid & (ATTR_SIZE |
1554                               ATTR_ATIME | ATTR_ATIME_SET |
1555                               ATTR_MTIME | ATTR_MTIME_SET))
1556                 /* For truncate and utimes sending attributes to OSTs, setting
1557                  * mtime/atime to the past will be performed under PW [0:EOF]
1558                  * extent lock (new_size:EOF for truncate).  It may seem
1559                  * excessive to send mtime/atime updates to OSTs when not
1560                  * setting times to past, but it is necessary due to possible
1561                  * time de-synchronization between MDT inode and OST objects */
1562                 rc = ll_setattr_ost(inode, attr);
1563         EXIT;
1564 out:
1565         if (op_data) {
1566                 if (op_data->op_ioepoch) {
1567                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1568                         if (!rc)
1569                                 rc = rc1;
1570                 }
1571                 ll_finish_md_op_data(op_data);
1572         }
1573         if (!S_ISDIR(inode->i_mode)) {
1574                 up_write(&lli->lli_trunc_sem);
1575                 mutex_lock(&inode->i_mutex);
1576                 if (attr->ia_valid & ATTR_SIZE)
1577                         inode_dio_wait(inode);
1578         }
1579
1580         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1581                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1582
1583         return rc;
1584 }
1585
1586 int ll_setattr(struct dentry *de, struct iattr *attr)
1587 {
1588         int mode = de->d_inode->i_mode;
1589
1590         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1591                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1592                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1593
1594         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1595                                (ATTR_SIZE|ATTR_MODE)) &&
1596             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1597              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1598               !(attr->ia_mode & S_ISGID))))
1599                 attr->ia_valid |= ATTR_FORCE;
1600
1601         if ((mode & S_ISUID) &&
1602             !(attr->ia_mode & S_ISUID) &&
1603             !(attr->ia_valid & ATTR_KILL_SUID))
1604                 attr->ia_valid |= ATTR_KILL_SUID;
1605
1606         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1607             !(attr->ia_mode & S_ISGID) &&
1608             !(attr->ia_valid & ATTR_KILL_SGID))
1609                 attr->ia_valid |= ATTR_KILL_SGID;
1610
1611         return ll_setattr_raw(de, attr);
1612 }
1613
1614 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1615                        __u64 max_age, __u32 flags)
1616 {
1617         struct ll_sb_info *sbi = ll_s2sbi(sb);
1618         struct obd_statfs obd_osfs;
1619         int rc;
1620         ENTRY;
1621
1622         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1623         if (rc) {
1624                 CERROR("md_statfs fails: rc = %d\n", rc);
1625                 RETURN(rc);
1626         }
1627
1628         osfs->os_type = sb->s_magic;
1629
1630         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1631                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1632
1633         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1634                 flags |= OBD_STATFS_NODELAY;
1635
1636         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1637         if (rc) {
1638                 CERROR("obd_statfs fails: rc = %d\n", rc);
1639                 RETURN(rc);
1640         }
1641
1642         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1643                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1644                obd_osfs.os_files);
1645
1646         osfs->os_bsize = obd_osfs.os_bsize;
1647         osfs->os_blocks = obd_osfs.os_blocks;
1648         osfs->os_bfree = obd_osfs.os_bfree;
1649         osfs->os_bavail = obd_osfs.os_bavail;
1650
1651         /* If we don't have as many objects free on the OST as inodes
1652          * on the MDS, we reduce the total number of inodes to
1653          * compensate, so that the "inodes in use" number is correct.
1654          */
1655         if (obd_osfs.os_ffree < osfs->os_ffree) {
1656                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1657                         obd_osfs.os_ffree;
1658                 osfs->os_ffree = obd_osfs.os_ffree;
1659         }
1660
1661         RETURN(rc);
1662 }
1663 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1664 {
1665         struct super_block *sb = de->d_sb;
1666         struct obd_statfs osfs;
1667         int rc;
1668
1669         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1670         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1671
1672         /* Some amount of caching on the client is allowed */
1673         rc = ll_statfs_internal(sb, &osfs,
1674                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1675                                 0);
1676         if (rc)
1677                 return rc;
1678
1679         statfs_unpack(sfs, &osfs);
1680
1681         /* We need to downshift for all 32-bit kernels, because we can't
1682          * tell if the kernel is being called via sys_statfs64() or not.
1683          * Stop before overflowing f_bsize - in which case it is better
1684          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1685         if (sizeof(long) < 8) {
1686                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1687                         sfs->f_bsize <<= 1;
1688
1689                         osfs.os_blocks >>= 1;
1690                         osfs.os_bfree >>= 1;
1691                         osfs.os_bavail >>= 1;
1692                 }
1693         }
1694
1695         sfs->f_blocks = osfs.os_blocks;
1696         sfs->f_bfree = osfs.os_bfree;
1697         sfs->f_bavail = osfs.os_bavail;
1698
1699         return 0;
1700 }
1701
1702 void ll_inode_size_lock(struct inode *inode)
1703 {
1704         struct ll_inode_info *lli;
1705
1706         LASSERT(!S_ISDIR(inode->i_mode));
1707
1708         lli = ll_i2info(inode);
1709         LASSERT(lli->lli_size_sem_owner != current);
1710         down(&lli->lli_size_sem);
1711         LASSERT(lli->lli_size_sem_owner == NULL);
1712         lli->lli_size_sem_owner = current;
1713 }
1714
1715 void ll_inode_size_unlock(struct inode *inode)
1716 {
1717         struct ll_inode_info *lli;
1718
1719         lli = ll_i2info(inode);
1720         LASSERT(lli->lli_size_sem_owner == current);
1721         lli->lli_size_sem_owner = NULL;
1722         up(&lli->lli_size_sem);
1723 }
1724
1725 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1726 {
1727         struct ll_inode_info *lli = ll_i2info(inode);
1728         struct mdt_body *body = md->body;
1729         struct lov_stripe_md *lsm = md->lsm;
1730         struct ll_sb_info *sbi = ll_i2sbi(inode);
1731
1732         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1733         if (lsm != NULL) {
1734                 if (!lli->lli_has_smd &&
1735                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1736                         cl_file_inode_init(inode, md);
1737
1738                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1739                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1740                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1741         }
1742
1743         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1744                 if (body->valid & OBD_MD_FLRMTPERM)
1745                         ll_update_remote_perm(inode, md->remote_perm);
1746         }
1747 #ifdef CONFIG_FS_POSIX_ACL
1748         else if (body->valid & OBD_MD_FLACL) {
1749                 spin_lock(&lli->lli_lock);
1750                 if (lli->lli_posix_acl)
1751                         posix_acl_release(lli->lli_posix_acl);
1752                 lli->lli_posix_acl = md->posix_acl;
1753                 spin_unlock(&lli->lli_lock);
1754         }
1755 #endif
1756         inode->i_ino = cl_fid_build_ino(&body->fid1, ll_need_32bit_api(sbi));
1757         inode->i_generation = cl_fid_build_gen(&body->fid1);
1758
1759         if (body->valid & OBD_MD_FLATIME) {
1760                 if (body->atime > LTIME_S(inode->i_atime))
1761                         LTIME_S(inode->i_atime) = body->atime;
1762                 lli->lli_lvb.lvb_atime = body->atime;
1763         }
1764         if (body->valid & OBD_MD_FLMTIME) {
1765                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1766                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1767                                "to "LPU64"\n", inode->i_ino,
1768                                LTIME_S(inode->i_mtime), body->mtime);
1769                         LTIME_S(inode->i_mtime) = body->mtime;
1770                 }
1771                 lli->lli_lvb.lvb_mtime = body->mtime;
1772         }
1773         if (body->valid & OBD_MD_FLCTIME) {
1774                 if (body->ctime > LTIME_S(inode->i_ctime))
1775                         LTIME_S(inode->i_ctime) = body->ctime;
1776                 lli->lli_lvb.lvb_ctime = body->ctime;
1777         }
1778         if (body->valid & OBD_MD_FLMODE)
1779                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1780         if (body->valid & OBD_MD_FLTYPE)
1781                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1782         LASSERT(inode->i_mode != 0);
1783         if (S_ISREG(inode->i_mode)) {
1784                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1785         } else {
1786                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1787         }
1788         if (body->valid & OBD_MD_FLUID)
1789                 inode->i_uid = body->uid;
1790         if (body->valid & OBD_MD_FLGID)
1791                 inode->i_gid = body->gid;
1792         if (body->valid & OBD_MD_FLFLAGS)
1793                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1794         if (body->valid & OBD_MD_FLNLINK)
1795                 set_nlink(inode, body->nlink);
1796         if (body->valid & OBD_MD_FLRDEV)
1797                 inode->i_rdev = old_decode_dev(body->rdev);
1798
1799         if (body->valid & OBD_MD_FLID) {
1800                 /* FID shouldn't be changed! */
1801                 if (fid_is_sane(&lli->lli_fid)) {
1802                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1803                                  "Trying to change FID "DFID
1804                                  " to the "DFID", inode %lu/%u(%p)\n",
1805                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1806                                  inode->i_ino, inode->i_generation, inode);
1807                 } else
1808                         lli->lli_fid = body->fid1;
1809         }
1810
1811         LASSERT(fid_seq(&lli->lli_fid) != 0);
1812
1813         if (body->valid & OBD_MD_FLSIZE) {
1814                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1815                     S_ISREG(inode->i_mode)) {
1816                         struct lustre_handle lockh;
1817                         ldlm_mode_t mode;
1818
1819                         /* As it is possible a blocking ast has been processed
1820                          * by this time, we need to check there is an UPDATE
1821                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1822                          * it. */
1823                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1824                                                &lockh, LDLM_FL_CBPENDING);
1825                         if (mode) {
1826                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1827                                                       LLIF_EPOCH_PENDING |
1828                                                       LLIF_SOM_DIRTY)) {
1829                                         CERROR("ino %lu flags %u still has "
1830                                                "size authority! do not trust "
1831                                                "the size got from MDS\n",
1832                                                inode->i_ino, lli->lli_flags);
1833                                 } else {
1834                                         /* Use old size assignment to avoid
1835                                          * deadlock bz14138 & bz14326 */
1836                                         i_size_write(inode, body->size);
1837                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1838                                 }
1839                                 ldlm_lock_decref(&lockh, mode);
1840                         }
1841                 } else {
1842                         /* Use old size assignment to avoid
1843                          * deadlock bz14138 & bz14326 */
1844                         i_size_write(inode, body->size);
1845
1846                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1847                                inode->i_ino, (unsigned long long)body->size);
1848                 }
1849
1850                 if (body->valid & OBD_MD_FLBLOCKS)
1851                         inode->i_blocks = body->blocks;
1852         }
1853
1854         if (body->valid & OBD_MD_FLMDSCAPA) {
1855                 LASSERT(md->mds_capa);
1856                 ll_add_capa(inode, md->mds_capa);
1857         }
1858         if (body->valid & OBD_MD_FLOSSCAPA) {
1859                 LASSERT(md->oss_capa);
1860                 ll_add_capa(inode, md->oss_capa);
1861         }
1862 }
1863
1864 void ll_read_inode2(struct inode *inode, void *opaque)
1865 {
1866         struct lustre_md *md = opaque;
1867         struct ll_inode_info *lli = ll_i2info(inode);
1868         ENTRY;
1869
1870         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1871                PFID(&lli->lli_fid), inode);
1872
1873         LASSERT(!lli->lli_has_smd);
1874
1875         /* Core attributes from the MDS first.  This is a new inode, and
1876          * the VFS doesn't zero times in the core inode so we have to do
1877          * it ourselves.  They will be overwritten by either MDS or OST
1878          * attributes - we just need to make sure they aren't newer. */
1879         LTIME_S(inode->i_mtime) = 0;
1880         LTIME_S(inode->i_atime) = 0;
1881         LTIME_S(inode->i_ctime) = 0;
1882         inode->i_rdev = 0;
1883         ll_update_inode(inode, md);
1884
1885         /* OIDEBUG(inode); */
1886
1887         /* initializing backing dev info. */
1888         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1889
1890
1891         if (S_ISREG(inode->i_mode)) {
1892                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1893                 inode->i_op = &ll_file_inode_operations;
1894                 inode->i_fop = sbi->ll_fop;
1895                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1896                 EXIT;
1897         } else if (S_ISDIR(inode->i_mode)) {
1898                 inode->i_op = &ll_dir_inode_operations;
1899                 inode->i_fop = &ll_dir_operations;
1900                 EXIT;
1901         } else if (S_ISLNK(inode->i_mode)) {
1902                 inode->i_op = &ll_fast_symlink_inode_operations;
1903                 EXIT;
1904         } else {
1905                 inode->i_op = &ll_special_inode_operations;
1906
1907                 init_special_inode(inode, inode->i_mode,
1908                                    inode->i_rdev);
1909
1910                 EXIT;
1911         }
1912 }
1913
1914 void ll_delete_inode(struct inode *inode)
1915 {
1916         struct cl_inode_info *lli = cl_i2info(inode);
1917         ENTRY;
1918
1919         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1920                 /* discard all dirty pages before truncating them, required by
1921                  * osc_extent implementation at LU-1030. */
1922                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1923
1924         truncate_inode_pages(&inode->i_data, 0);
1925
1926         /* Workaround for LU-118 */
1927         if (inode->i_data.nrpages) {
1928                 TREE_READ_LOCK_IRQ(&inode->i_data);
1929                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1930                 LASSERTF(inode->i_data.nrpages == 0,
1931                          "inode=%lu/%u(%p) nrpages=%lu, see "
1932                          "http://jira.whamcloud.com/browse/LU-118\n",
1933                          inode->i_ino, inode->i_generation, inode,
1934                          inode->i_data.nrpages);
1935         }
1936         /* Workaround end */
1937
1938 #ifdef HAVE_SBOPS_EVICT_INODE
1939         ll_clear_inode(inode);
1940 #endif
1941         clear_inode(inode);
1942
1943         EXIT;
1944 }
1945
1946 int ll_iocontrol(struct inode *inode, struct file *file,
1947                  unsigned int cmd, unsigned long arg)
1948 {
1949         struct ll_sb_info *sbi = ll_i2sbi(inode);
1950         struct ptlrpc_request *req = NULL;
1951         int rc, flags = 0;
1952         ENTRY;
1953
1954         switch(cmd) {
1955         case FSFILT_IOC_GETFLAGS: {
1956                 struct mdt_body *body;
1957                 struct md_op_data *op_data;
1958
1959                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1960                                              0, 0, LUSTRE_OPC_ANY,
1961                                              NULL);
1962                 if (IS_ERR(op_data))
1963                         RETURN(PTR_ERR(op_data));
1964
1965                 op_data->op_valid = OBD_MD_FLFLAGS;
1966                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1967                 ll_finish_md_op_data(op_data);
1968                 if (rc) {
1969                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1970                         RETURN(-abs(rc));
1971                 }
1972
1973                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1974
1975                 flags = body->flags;
1976
1977                 ptlrpc_req_finished(req);
1978
1979                 RETURN(put_user(flags, (int *)arg));
1980         }
1981         case FSFILT_IOC_SETFLAGS: {
1982                 struct lov_stripe_md *lsm;
1983                 struct obd_info oinfo = { { { 0 } } };
1984                 struct md_op_data *op_data;
1985
1986                 if (get_user(flags, (int *)arg))
1987                         RETURN(-EFAULT);
1988
1989                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1990                                              LUSTRE_OPC_ANY, NULL);
1991                 if (IS_ERR(op_data))
1992                         RETURN(PTR_ERR(op_data));
1993
1994                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1995                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1996                 rc = md_setattr(sbi->ll_md_exp, op_data,
1997                                 NULL, 0, NULL, 0, &req, NULL);
1998                 ll_finish_md_op_data(op_data);
1999                 ptlrpc_req_finished(req);
2000                 if (rc)
2001                         RETURN(rc);
2002
2003                 inode->i_flags = ll_ext_to_inode_flags(flags);
2004
2005                 lsm = ccc_inode_lsm_get(inode);
2006                 if (lsm == NULL)
2007                         RETURN(0);
2008
2009                 OBDO_ALLOC(oinfo.oi_oa);
2010                 if (!oinfo.oi_oa) {
2011                         ccc_inode_lsm_put(inode, lsm);
2012                         RETURN(-ENOMEM);
2013                 }
2014                 oinfo.oi_md = lsm;
2015                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2016                 oinfo.oi_oa->o_flags = flags;
2017                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2018                                        OBD_MD_FLGROUP;
2019                 oinfo.oi_capa = ll_mdscapa_get(inode);
2020                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2021                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2022                 capa_put(oinfo.oi_capa);
2023                 OBDO_FREE(oinfo.oi_oa);
2024                 ccc_inode_lsm_put(inode, lsm);
2025
2026                 if (rc && rc != -EPERM && rc != -EACCES)
2027                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2028
2029                 RETURN(rc);
2030         }
2031         default:
2032                 RETURN(-ENOSYS);
2033         }
2034
2035         RETURN(0);
2036 }
2037
2038 int ll_flush_ctx(struct inode *inode)
2039 {
2040         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2041
2042         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2043
2044         obd_set_info_async(NULL, sbi->ll_md_exp,
2045                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2046                            0, NULL, NULL);
2047         obd_set_info_async(NULL, sbi->ll_dt_exp,
2048                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2049                            0, NULL, NULL);
2050         return 0;
2051 }
2052
2053 /* umount -f client means force down, don't save state */
2054 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2055 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2056 {
2057         struct super_block *sb = vfsmnt->mnt_sb;
2058 #else
2059 void ll_umount_begin(struct super_block *sb)
2060 {
2061 #endif
2062         struct ll_sb_info *sbi = ll_s2sbi(sb);
2063         struct obd_device *obd;
2064         struct obd_ioctl_data *ioc_data;
2065         ENTRY;
2066
2067 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2068         if (!(flags & MNT_FORCE)) {
2069                 EXIT;
2070                 return;
2071         }
2072 #endif
2073
2074         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2075                sb->s_count, atomic_read(&sb->s_active));
2076
2077         obd = class_exp2obd(sbi->ll_md_exp);
2078         if (obd == NULL) {
2079                 CERROR("Invalid MDC connection handle "LPX64"\n",
2080                        sbi->ll_md_exp->exp_handle.h_cookie);
2081                 EXIT;
2082                 return;
2083         }
2084         obd->obd_force = 1;
2085
2086         obd = class_exp2obd(sbi->ll_dt_exp);
2087         if (obd == NULL) {
2088                 CERROR("Invalid LOV connection handle "LPX64"\n",
2089                        sbi->ll_dt_exp->exp_handle.h_cookie);
2090                 EXIT;
2091                 return;
2092         }
2093         obd->obd_force = 1;
2094
2095         OBD_ALLOC_PTR(ioc_data);
2096         if (ioc_data) {
2097                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2098                               sizeof *ioc_data, ioc_data, NULL);
2099
2100                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2101                               sizeof *ioc_data, ioc_data, NULL);
2102
2103                 OBD_FREE_PTR(ioc_data);
2104         }
2105
2106
2107         /* Really, we'd like to wait until there are no requests outstanding,
2108          * and then continue.  For now, we just invalidate the requests,
2109          * schedule() and sleep one second if needed, and hope.
2110          */
2111         cfs_schedule();
2112 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2113         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2114                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2115                                                    cfs_time_seconds(1));
2116                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2117                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2118                                       "may try to umount it a bit later\n",
2119                                       atomic_read(&vfsmnt->mnt_count));
2120         }
2121 #endif
2122
2123         EXIT;
2124 }
2125
2126 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2127 {
2128         struct ll_sb_info *sbi = ll_s2sbi(sb);
2129         char *profilenm = get_profile_name(sb);
2130         int err;
2131         __u32 read_only;
2132
2133         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2134                 read_only = *flags & MS_RDONLY;
2135                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2136                                          sizeof(KEY_READ_ONLY),
2137                                          KEY_READ_ONLY, sizeof(read_only),
2138                                          &read_only, NULL);
2139                 if (err) {
2140                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2141                                       profilenm, read_only ?
2142                                       "read-only" : "read-write", err);
2143                         return err;
2144                 }
2145
2146                 if (read_only)
2147                         sb->s_flags |= MS_RDONLY;
2148                 else
2149                         sb->s_flags &= ~MS_RDONLY;
2150
2151                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2152                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2153                                       read_only ?  "read-only" : "read-write");
2154         }
2155         return 0;
2156 }
2157
2158 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2159                   struct super_block *sb, struct lookup_intent *it)
2160 {
2161         struct ll_sb_info *sbi = NULL;
2162         struct lustre_md md;
2163         int rc;
2164         ENTRY;
2165
2166         LASSERT(*inode || sb);
2167         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2168         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2169                               sbi->ll_md_exp, &md);
2170         if (rc)
2171                 RETURN(rc);
2172
2173         if (*inode) {
2174                 ll_update_inode(*inode, &md);
2175         } else {
2176                 LASSERT(sb != NULL);
2177
2178                 /*
2179                  * At this point server returns to client's same fid as client
2180                  * generated for creating. So using ->fid1 is okay here.
2181                  */
2182                 LASSERT(fid_is_sane(&md.body->fid1));
2183
2184                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2185                                                       ll_need_32bit_api(sbi)),
2186                                  &md);
2187                 if (*inode == NULL || IS_ERR(*inode)) {
2188 #ifdef CONFIG_FS_POSIX_ACL
2189                         if (md.posix_acl) {
2190                                 posix_acl_release(md.posix_acl);
2191                                 md.posix_acl = NULL;
2192                         }
2193 #endif
2194                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2195                         *inode = NULL;
2196                         CERROR("new_inode -fatal: rc %d\n", rc);
2197                         GOTO(out, rc);
2198                 }
2199         }
2200
2201         /* Handling piggyback layout lock.
2202          * Layout lock can be piggybacked by getattr and open request.
2203          * The lsm can be applied to inode only if it comes with a layout lock
2204          * otherwise correct layout may be overwritten, for example:
2205          * 1. proc1: mdt returns a lsm but not granting layout
2206          * 2. layout was changed by another client
2207          * 3. proc2: refresh layout and layout lock granted
2208          * 4. proc1: to apply a stale layout */
2209         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2210                 struct lustre_handle lockh;
2211                 struct ldlm_lock *lock;
2212
2213                 lockh.cookie = it->d.lustre.it_lock_handle;
2214                 lock = ldlm_handle2lock(&lockh);
2215                 LASSERT(lock != NULL);
2216                 if (ldlm_has_layout(lock)) {
2217                         struct cl_object_conf conf;
2218
2219                         memset(&conf, 0, sizeof(conf));
2220                         conf.coc_opc = OBJECT_CONF_SET;
2221                         conf.coc_inode = *inode;
2222                         conf.coc_lock = lock;
2223                         conf.u.coc_md = &md;
2224                         (void)ll_layout_conf(*inode, &conf);
2225                 }
2226                 LDLM_LOCK_PUT(lock);
2227         }
2228
2229 out:
2230         if (md.lsm != NULL)
2231                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2232         md_free_lustre_md(sbi->ll_md_exp, &md);
2233         RETURN(rc);
2234 }
2235
2236 int ll_obd_statfs(struct inode *inode, void *arg)
2237 {
2238         struct ll_sb_info *sbi = NULL;
2239         struct obd_export *exp;
2240         char *buf = NULL;
2241         struct obd_ioctl_data *data = NULL;
2242         __u32 type;
2243         __u32 flags;
2244         int len = 0, rc;
2245
2246         if (!inode || !(sbi = ll_i2sbi(inode)))
2247                 GOTO(out_statfs, rc = -EINVAL);
2248
2249         rc = obd_ioctl_getdata(&buf, &len, arg);
2250         if (rc)
2251                 GOTO(out_statfs, rc);
2252
2253         data = (void*)buf;
2254         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2255             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2256                 GOTO(out_statfs, rc = -EINVAL);
2257
2258         if (data->ioc_inllen1 != sizeof(__u32) ||
2259             data->ioc_inllen2 != sizeof(__u32) ||
2260             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2261             data->ioc_plen2 != sizeof(struct obd_uuid))
2262                 GOTO(out_statfs, rc = -EINVAL);
2263
2264         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2265         if (type & LL_STATFS_LMV)
2266                 exp = sbi->ll_md_exp;
2267         else if (type & LL_STATFS_LOV)
2268                 exp = sbi->ll_dt_exp;
2269         else
2270                 GOTO(out_statfs, rc = -ENODEV);
2271
2272         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2273         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2274         if (rc)
2275                 GOTO(out_statfs, rc);
2276 out_statfs:
2277         if (buf)
2278                 obd_ioctl_freedata(buf, len);
2279         return rc;
2280 }
2281
2282 int ll_process_config(struct lustre_cfg *lcfg)
2283 {
2284         char *ptr;
2285         void *sb;
2286         struct lprocfs_static_vars lvars;
2287         unsigned long x;
2288         int rc = 0;
2289
2290         lprocfs_llite_init_vars(&lvars);
2291
2292         /* The instance name contains the sb: lustre-client-aacfe000 */
2293         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2294         if (!ptr || !*(++ptr))
2295                 return -EINVAL;
2296         if (sscanf(ptr, "%lx", &x) != 1)
2297                 return -EINVAL;
2298         sb = (void *)x;
2299         /* This better be a real Lustre superblock! */
2300         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2301
2302         /* Note we have not called client_common_fill_super yet, so
2303            proc fns must be able to handle that! */
2304         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2305                                       lcfg, sb);
2306         if (rc > 0)
2307                 rc = 0;
2308         return(rc);
2309 }
2310
2311 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2312 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2313                                        struct inode *i1, struct inode *i2,
2314                                        const char *name, int namelen,
2315                                        int mode, __u32 opc, void *data)
2316 {
2317         LASSERT(i1 != NULL);
2318
2319         if (namelen > ll_i2sbi(i1)->ll_namelen)
2320                 return ERR_PTR(-ENAMETOOLONG);
2321
2322         if (op_data == NULL)
2323                 OBD_ALLOC_PTR(op_data);
2324
2325         if (op_data == NULL)
2326                 return ERR_PTR(-ENOMEM);
2327
2328         ll_i2gids(op_data->op_suppgids, i1, i2);
2329         op_data->op_fid1 = *ll_inode2fid(i1);
2330         op_data->op_capa1 = ll_mdscapa_get(i1);
2331
2332         if (i2) {
2333                 op_data->op_fid2 = *ll_inode2fid(i2);
2334                 op_data->op_capa2 = ll_mdscapa_get(i2);
2335         } else {
2336                 fid_zero(&op_data->op_fid2);
2337                 op_data->op_capa2 = NULL;
2338         }
2339
2340         op_data->op_name = name;
2341         op_data->op_namelen = namelen;
2342         op_data->op_mode = mode;
2343         op_data->op_mod_time = cfs_time_current_sec();
2344         op_data->op_fsuid = cfs_curproc_fsuid();
2345         op_data->op_fsgid = cfs_curproc_fsgid();
2346         op_data->op_cap = cfs_curproc_cap_pack();
2347         op_data->op_bias = 0;
2348         op_data->op_cli_flags = 0;
2349         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2350              filename_is_volatile(name, namelen, NULL))
2351                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2352         op_data->op_opc = opc;
2353         op_data->op_mds = 0;
2354         op_data->op_data = data;
2355
2356         /* If the file is being opened after mknod() (normally due to NFS)
2357          * try to use the default stripe data from parent directory for
2358          * allocating OST objects.  Try to pass the parent FID to MDS. */
2359         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2360             !ll_i2info(i2)->lli_has_smd) {
2361                 struct ll_inode_info *lli = ll_i2info(i2);
2362
2363                 spin_lock(&lli->lli_lock);
2364                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2365                         op_data->op_fid1 = lli->lli_pfid;
2366                 spin_unlock(&lli->lli_lock);
2367                 /** We ignore parent's capability temporary. */
2368         }
2369
2370         /* When called by ll_setattr_raw, file is i1. */
2371         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2372                 op_data->op_bias |= MDS_DATA_MODIFIED;
2373
2374         return op_data;
2375 }
2376
2377 void ll_finish_md_op_data(struct md_op_data *op_data)
2378 {
2379         capa_put(op_data->op_capa1);
2380         capa_put(op_data->op_capa2);
2381         OBD_FREE_PTR(op_data);
2382 }
2383
2384 #ifdef HAVE_SUPEROPS_USE_DENTRY
2385 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2386 #else
2387 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2388 #endif
2389 {
2390         struct ll_sb_info *sbi;
2391
2392 #ifdef HAVE_SUPEROPS_USE_DENTRY
2393         LASSERT((seq != NULL) && (dentry != NULL));
2394         sbi = ll_s2sbi(dentry->d_sb);
2395 #else
2396         LASSERT((seq != NULL) && (vfs != NULL));
2397         sbi = ll_s2sbi(vfs->mnt_sb);
2398 #endif
2399
2400         if (sbi->ll_flags & LL_SBI_NOLCK)
2401                 seq_puts(seq, ",nolock");
2402
2403         if (sbi->ll_flags & LL_SBI_FLOCK)
2404                 seq_puts(seq, ",flock");
2405
2406         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2407                 seq_puts(seq, ",localflock");
2408
2409         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2410                 seq_puts(seq, ",user_xattr");
2411
2412         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2413                 seq_puts(seq, ",lazystatfs");
2414
2415         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2416                 seq_puts(seq, ",user_fid2path");
2417
2418         RETURN(0);
2419 }
2420
2421 /**
2422  * Get obd name by cmd, and copy out to user space
2423  */
2424 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2425 {
2426         struct ll_sb_info *sbi = ll_i2sbi(inode);
2427         struct obd_device *obd;
2428         ENTRY;
2429
2430         if (cmd == OBD_IOC_GETDTNAME)
2431                 obd = class_exp2obd(sbi->ll_dt_exp);
2432         else if (cmd == OBD_IOC_GETMDNAME)
2433                 obd = class_exp2obd(sbi->ll_md_exp);
2434         else
2435                 RETURN(-EINVAL);
2436
2437         if (!obd)
2438                 RETURN(-ENOENT);
2439
2440         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2441                              strlen(obd->obd_name) + 1))
2442                 RETURN(-EFAULT);
2443
2444         RETURN(0);
2445 }
2446
2447 /**
2448  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2449  * fsname will be returned in this buffer; otherwise, a static buffer will be
2450  * used to store the fsname and returned to caller.
2451  */
2452 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2453 {
2454         static char fsname_static[MTI_NAME_MAXLEN];
2455         struct lustre_sb_info *lsi = s2lsi(sb);
2456         char *ptr;
2457         int len;
2458
2459         if (buf == NULL) {
2460                 /* this means the caller wants to use static buffer
2461                  * and it doesn't care about race. Usually this is
2462                  * in error reporting path */
2463                 buf = fsname_static;
2464                 buflen = sizeof(fsname_static);
2465         }
2466
2467         len = strlen(lsi->lsi_lmd->lmd_profile);
2468         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2469         if (ptr && (strcmp(ptr, "-client") == 0))
2470                 len -= 7;
2471
2472         if (unlikely(len >= buflen))
2473                 len = buflen - 1;
2474         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2475         buf[len] = '\0';
2476
2477         return buf;
2478 }
2479
2480 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2481 {
2482         char *path = NULL;
2483
2484 #ifdef HAVE_FS_STRUCT_USE_PATH
2485         struct path p;
2486
2487         p.dentry = dentry;
2488         p.mnt = current->fs->root.mnt;
2489         path_get(&p);
2490         path = d_path(&p, buf, bufsize);
2491         path_put(&p);
2492 #else
2493         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2494 #endif
2495
2496         return path;
2497 }
2498
2499 void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
2500 {
2501         char *buf, *path = NULL;
2502         struct dentry *dentry = NULL;
2503         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2504
2505         /* this can be called inside spin lock so use GFP_ATOMIC. */
2506         buf = (char *)__get_free_page(GFP_ATOMIC);
2507         if (buf != NULL) {
2508                 dentry = d_find_alias(page->mapping->host);
2509                 if (dentry != NULL)
2510                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2511         }
2512
2513         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2514               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2515               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2516               PFID(&obj->cob_header.coh_lu.loh_fid),
2517               (path && !IS_ERR(path)) ? path : "", ioret);
2518
2519         if (dentry != NULL)
2520                 dput(dentry);
2521
2522         if (buf != NULL)
2523                 free_page((unsigned long)buf);
2524 }