drivers/staging/lustre/lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/mm.h>
  47
  48 #include "../include/lustre_lite.h"
  49 #include "../include/lustre_ha.h"
  50 #include "../include/lustre_dlm.h"
  51 #include "../include/lprocfs_status.h"
  52 #include "../include/lustre_disk.h"
  53 #include "../include/lustre_param.h"
  54 #include "../include/lustre_log.h"
  55 #include "../include/cl_object.h"
  56 #include "../include/obd_cksum.h"
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60 struct proc_dir_entry *proc_lustre_fs_root;
  61
  62 static LIST_HEAD(ll_super_blocks);
  63 static DEFINE_SPINLOCK(ll_sb_lock);
  64
  65 #ifndef log2
  66 #define log2(n) ffz(~(n))
  67 #endif
  68
  69 static struct ll_sb_info *ll_init_sbi(void)
  70 {
  71         struct ll_sb_info *sbi = NULL;
  72         unsigned long pages;
  73         unsigned long lru_page_max;
  74         struct sysinfo si;
  75         class_uuid_t uuid;
  76         int i;
  77
  78         sbi = kzalloc(sizeof(*sbi), GFP_NOFS);
  79         if (!sbi)
  80                 return NULL;
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
  91                 lru_page_max = pages / 2;
  92         } else {
  93                 lru_page_max = (pages / 4) * 3;
  94         }
  95
  96         /* initialize lru data */
  97         atomic_set(&sbi->ll_cache.ccc_users, 0);
  98         sbi->ll_cache.ccc_lru_max = lru_page_max;
  99         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 100         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 101         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 102
 103         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 104                                            SBI_DEFAULT_READAHEAD_MAX);
 105         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 106         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 107                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 108         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 109         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 110
 111         ll_generate_random_uuid(uuid);
 112         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 113         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 114
 115         spin_lock(&ll_sb_lock);
 116         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 117         spin_unlock(&ll_sb_lock);
 118
 119         sbi->ll_flags |= LL_SBI_VERBOSE;
 120         sbi->ll_flags |= LL_SBI_CHECKSUM;
 121
 122         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 123
 124         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 125                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 126                                pp_r_hist.oh_lock);
 127                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 128                                pp_w_hist.oh_lock);
 129         }
 130
 131         /* metadata statahead is enabled by default */
 132         sbi->ll_sa_max = LL_SA_RPC_DEF;
 133         atomic_set(&sbi->ll_sa_total, 0);
 134         atomic_set(&sbi->ll_sa_wrong, 0);
 135         atomic_set(&sbi->ll_agl_total, 0);
 136         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 137
 138         return sbi;
 139 }
 140
 141 static void ll_free_sbi(struct super_block *sb)
 142 {
 143         struct ll_sb_info *sbi = ll_s2sbi(sb);
 144
 145         if (sbi != NULL) {
 146                 spin_lock(&ll_sb_lock);
 147                 list_del(&sbi->ll_list);
 148                 spin_unlock(&ll_sb_lock);
 149                 OBD_FREE(sbi, sizeof(*sbi));
 150         }
 151 }
 152
 153 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 154                                     struct vfsmount *mnt)
 155 {
 156         struct inode *root = NULL;
 157         struct ll_sb_info *sbi = ll_s2sbi(sb);
 158         struct obd_device *obd;
 159         struct obd_capa *oc = NULL;
 160         struct obd_statfs *osfs = NULL;
 161         struct ptlrpc_request *request = NULL;
 162         struct obd_connect_data *data = NULL;
 163         struct obd_uuid *uuid;
 164         struct md_op_data *op_data;
 165         struct lustre_md lmd;
 166         u64 valid;
 167         int size, err, checksum;
 168
 169         obd = class_name2obd(md);
 170         if (!obd) {
 171                 CERROR("MD %s: not setup or attached\n", md);
 172                 return -EINVAL;
 173         }
 174
 175         data = kzalloc(sizeof(*data), GFP_NOFS);
 176         if (!data)
 177                 return -ENOMEM;
 178
 179         osfs = kzalloc(sizeof(*osfs), GFP_NOFS);
 180         if (!osfs) {
 181                 OBD_FREE_PTR(data);
 182                 return -ENOMEM;
 183         }
 184
 185         if (proc_lustre_fs_root) {
 186                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 187                                                   dt, md);
 188                 if (err < 0)
 189                         CERROR("could not register mount in /proc/fs/lustre\n");
 190         }
 191
 192         /* indicate the features supported by this client */
 193         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 194                                   OBD_CONNECT_ATTRFID  |
 195                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 196                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 197                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 198                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 199                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 200                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 201                                   OBD_CONNECT_EINPROGRESS |
 202                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 203                                   OBD_CONNECT_LAYOUTLOCK |
 204                                   OBD_CONNECT_PINGLESS |
 205                                   OBD_CONNECT_MAX_EASIZE |
 206                                   OBD_CONNECT_FLOCK_DEAD |
 207                                   OBD_CONNECT_DISP_STRIPE;
 208
 209         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 210                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 211
 212         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 213                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 214 #ifdef CONFIG_FS_POSIX_ACL
 215         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 216 #endif
 217
 218         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 219                 /* flag mdc connection as lightweight, only used for test
 220                  * purpose, use with care */
 221                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 222
 223         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 224         data->ocd_version = LUSTRE_VERSION_CODE;
 225
 226         if (sb->s_flags & MS_RDONLY)
 227                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 228         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 229                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 230
 231 #ifdef HAVE_MS_FLOCK_LOCK
 232         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 233         sb->s_flags |= MS_FLOCK_LOCK;
 234 #endif
 235 #ifdef MS_HAS_NEW_AOPS
 236         sb->s_flags |= MS_HAS_NEW_AOPS;
 237 #endif
 238
 239         if (sbi->ll_flags & LL_SBI_FLOCK)
 240                 sbi->ll_fop = &ll_file_operations_flock;
 241         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 242                 sbi->ll_fop = &ll_file_operations;
 243         else
 244                 sbi->ll_fop = &ll_file_operations_noflock;
 245
 246         /* real client */
 247         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 248         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 249                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 250
 251         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 252
 253         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 254         if (err == -EBUSY) {
 255                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 256                                    "recovery, of which this client is not a "
 257                                    "part. Please wait for recovery to complete,"
 258                                    " abort, or time out.\n", md);
 259                 goto out;
 260         } else if (err) {
 261                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 262                 goto out;
 263         }
 264
 265         sbi->ll_md_exp->exp_connect_data = *data;
 266
 267         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 268                            LUSTRE_SEQ_METADATA);
 269         if (err) {
 270                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 271                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 272                 goto out_md;
 273         }
 274
 275         /* For mount, we only need fs info from MDT0, and also in DNE, it
 276          * can make sure the client can be mounted as long as MDT0 is
 277          * available */
 278         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 279                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 280                         OBD_STATFS_FOR_MDT0);
 281         if (err)
 282                 goto out_md_fid;
 283
 284         /* This needs to be after statfs to ensure connect has finished.
 285          * Note that "data" does NOT contain the valid connect reply.
 286          * If connecting to a 1.8 server there will be no LMV device, so
 287          * we can access the MDC export directly and exp_connect_flags will
 288          * be non-zero, but if accessing an upgraded 2.1 server it will
 289          * have the correct flags filled in.
 290          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 291         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 292         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 293             valid != CLIENT_CONNECT_MDT_REQD) {
 294                 char *buf;
 295
 296                 buf = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
 297                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 298                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 299                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 300                                    "feature(s) needed for correct operation "
 301                                    "of this client (%s). Please upgrade "
 302                                    "server or downgrade client.\n",
 303                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 304                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 305                 err = -EPROTO;
 306                 goto out_md_fid;
 307         }
 308
 309         size = sizeof(*data);
 310         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 311                            KEY_CONN_DATA,  &size, data, NULL);
 312         if (err) {
 313                 CERROR("%s: Get connect data failed: rc = %d\n",
 314                        sbi->ll_md_exp->exp_obd->obd_name, err);
 315                 goto out_md_fid;
 316         }
 317
 318         LASSERT(osfs->os_bsize);
 319         sb->s_blocksize = osfs->os_bsize;
 320         sb->s_blocksize_bits = log2(osfs->os_bsize);
 321         sb->s_magic = LL_SUPER_MAGIC;
 322         sb->s_maxbytes = MAX_LFS_FILESIZE;
 323         sbi->ll_namelen = osfs->os_namelen;
 324         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 325
 326         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 327             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 328                 LCONSOLE_INFO("Disabling user_xattr feature because "
 329                               "it is not supported on the server\n");
 330                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 331         }
 332
 333         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 334 #ifdef MS_POSIXACL
 335                 sb->s_flags |= MS_POSIXACL;
 336 #endif
 337                 sbi->ll_flags |= LL_SBI_ACL;
 338         } else {
 339                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 340 #ifdef MS_POSIXACL
 341                 sb->s_flags &= ~MS_POSIXACL;
 342 #endif
 343                 sbi->ll_flags &= ~LL_SBI_ACL;
 344         }
 345
 346         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 347                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 348                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 349                         LCONSOLE_INFO("client is set as remote by default.\n");
 350                 }
 351         } else {
 352                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 353                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 354                         LCONSOLE_INFO("client claims to be remote, but server "
 355                                       "rejected, forced to be local.\n");
 356                 }
 357         }
 358
 359         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 360                 LCONSOLE_INFO("client enabled MDS capability!\n");
 361                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 362         }
 363
 364         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 365                 LCONSOLE_INFO("client enabled OSS capability!\n");
 366                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 367         }
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 370                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 371
 372         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 373                 sbi->ll_md_brw_size = data->ocd_brw_size;
 374         else
 375                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 378                 LCONSOLE_INFO("Layout lock feature supported.\n");
 379                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 380         }
 381
 382         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 383                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 384                         LCONSOLE_INFO(
 385                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 386                                 dt);
 387                 } else {
 388                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 389                         sbi->ll_xattr_cache_enabled = 1;
 390                 }
 391         }
 392
 393         obd = class_name2obd(dt);
 394         if (!obd) {
 395                 CERROR("DT %s: not setup or attached\n", dt);
 396                 err = -ENODEV;
 397                 goto out_md_fid;
 398         }
 399
 400         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 401                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 402                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 403                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 404                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 405                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 406                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 407                                   OBD_CONNECT_MAXBYTES |
 408                                   OBD_CONNECT_EINPROGRESS |
 409                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 410                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 411
 412         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 413                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 414
 415         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 416                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 417                  * disabled by default, because it can still be enabled on the
 418                  * fly via /proc. As a consequence, we still need to come to an
 419                  * agreement on the supported algorithms at connect time */
 420                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 421
 422                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 423                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 424                 else
 425                         data->ocd_cksum_types = cksum_types_supported_client();
 426         }
 427
 428         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 429         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 430                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 431
 432         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 433                "ocd_grant: %d\n", data->ocd_connect_flags,
 434                data->ocd_version, data->ocd_grant);
 435
 436         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 437         obd->obd_upcall.onu_upcall = cl_ocd_update;
 438
 439         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 440
 441         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 442                           NULL);
 443         if (err == -EBUSY) {
 444                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 445                                    "recovery, of which this client is not a "
 446                                    "part.  Please wait for recovery to "
 447                                    "complete, abort, or time out.\n", dt);
 448                 goto out_md;
 449         } else if (err) {
 450                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 451                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 452                 goto out_md;
 453         }
 454
 455         sbi->ll_dt_exp->exp_connect_data = *data;
 456
 457         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 458                            LUSTRE_SEQ_METADATA);
 459         if (err) {
 460                 CERROR("%s: Can't init data layer FID infrastructure, "
 461                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 462                 goto out_dt;
 463         }
 464
 465         mutex_lock(&sbi->ll_lco.lco_lock);
 466         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 467         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 468         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 469         mutex_unlock(&sbi->ll_lco.lco_lock);
 470
 471         fid_zero(&sbi->ll_root_fid);
 472         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 473         if (err) {
 474                 CERROR("cannot mds_connect: rc = %d\n", err);
 475                 goto out_lock_cn_cb;
 476         }
 477         if (!fid_is_sane(&sbi->ll_root_fid)) {
 478                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 479                        sbi->ll_md_exp->exp_obd->obd_name,
 480                        PFID(&sbi->ll_root_fid));
 481                 err = -EINVAL;
 482                 goto out_lock_cn_cb;
 483         }
 484         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 485
 486         sb->s_op = &lustre_super_operations;
 487 #if THREAD_SIZE >= 8192 /*b=17630*/
 488         sb->s_export_op = &lustre_export_operations;
 489 #endif
 490
 491         /* make root inode
 492          * XXX: move this to after cbd setup? */
 493         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 494         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 495                 valid |= OBD_MD_FLRMTPERM;
 496         else if (sbi->ll_flags & LL_SBI_ACL)
 497                 valid |= OBD_MD_FLACL;
 498
 499         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 500         if (!op_data) {
 501                 err = -ENOMEM;
 502                 goto out_lock_cn_cb;
 503         }
 504
 505         op_data->op_fid1 = sbi->ll_root_fid;
 506         op_data->op_mode = 0;
 507         op_data->op_capa1 = oc;
 508         op_data->op_valid = valid;
 509
 510         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 511         if (oc)
 512                 capa_put(oc);
 513         OBD_FREE_PTR(op_data);
 514         if (err) {
 515                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 516                        sbi->ll_md_exp->exp_obd->obd_name, err);
 517                 goto out_lock_cn_cb;
 518         }
 519
 520         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 521                                sbi->ll_md_exp, &lmd);
 522         if (err) {
 523                 CERROR("failed to understand root inode md: rc = %d\n", err);
 524                 ptlrpc_req_finished(request);
 525                 goto out_lock_cn_cb;
 526         }
 527
 528         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 529         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 530                                             sbi->ll_flags & LL_SBI_32BIT_API),
 531                        &lmd);
 532         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 533         ptlrpc_req_finished(request);
 534
 535         if (root == NULL || IS_ERR(root)) {
 536                 if (lmd.lsm)
 537                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 538 #ifdef CONFIG_FS_POSIX_ACL
 539                 if (lmd.posix_acl) {
 540                         posix_acl_release(lmd.posix_acl);
 541                         lmd.posix_acl = NULL;
 542                 }
 543 #endif
 544                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 545                 root = NULL;
 546                 CERROR("lustre_lite: bad iget4 for root\n");
 547                 goto out_root;
 548         }
 549
 550         err = ll_close_thread_start(&sbi->ll_lcq);
 551         if (err) {
 552                 CERROR("cannot start close thread: rc %d\n", err);
 553                 goto out_root;
 554         }
 555
 556 #ifdef CONFIG_FS_POSIX_ACL
 557         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 558                 rct_init(&sbi->ll_rct);
 559                 et_init(&sbi->ll_et);
 560         }
 561 #endif
 562
 563         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 564         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 565                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 566                                  NULL);
 567         cl_sb_init(sb);
 568
 569         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 570                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 571                                  &sbi->ll_cache, NULL);
 572
 573         sb->s_root = d_make_root(root);
 574         if (sb->s_root == NULL) {
 575                 CERROR("%s: can't make root dentry\n",
 576                         ll_get_fsname(sb, NULL, 0));
 577                 err = -ENOMEM;
 578                 goto out_lock_cn_cb;
 579         }
 580
 581         sbi->ll_sdev_orig = sb->s_dev;
 582
 583         /* We set sb->s_dev equal on all lustre clients in order to support
 584          * NFS export clustering.  NFSD requires that the FSID be the same
 585          * on all clients. */
 586         /* s_dev is also used in lt_compare() to compare two fs, but that is
 587          * only a node-local comparison. */
 588         uuid = obd_get_uuid(sbi->ll_md_exp);
 589         if (uuid != NULL) {
 590                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 591                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 592         }
 593
 594         if (data != NULL)
 595                 OBD_FREE_PTR(data);
 596         if (osfs != NULL)
 597                 OBD_FREE_PTR(osfs);
 598
 599         return err;
 600 out_root:
 601         iput(root);
 602 out_lock_cn_cb:
 603         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 604 out_dt:
 605         obd_disconnect(sbi->ll_dt_exp);
 606         sbi->ll_dt_exp = NULL;
 607         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 608         obd_zombie_barrier();
 609 out_md_fid:
 610         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 611 out_md:
 612         obd_disconnect(sbi->ll_md_exp);
 613         sbi->ll_md_exp = NULL;
 614 out:
 615         if (data != NULL)
 616                 OBD_FREE_PTR(data);
 617         if (osfs != NULL)
 618                 OBD_FREE_PTR(osfs);
 619         lprocfs_unregister_mountpoint(sbi);
 620         return err;
 621 }
 622
 623 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 624 {
 625         int size, rc;
 626
 627         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 628         size = sizeof(int);
 629         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 630                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 631         if (rc)
 632                 CERROR("Get max mdsize error rc %d \n", rc);
 633
 634         return rc;
 635 }
 636
 637 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 638 {
 639         int size, rc;
 640
 641         size = sizeof(int);
 642         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 643                          KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 644         if (rc)
 645                 CERROR("Get default mdsize error rc %d\n", rc);
 646
 647         return rc;
 648 }
 649
 650 int ll_get_max_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 651 {
 652         int size, rc;
 653
 654         size = sizeof(int);
 655         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_COOKIESIZE),
 656                           KEY_MAX_COOKIESIZE, &size, lmmsize, NULL);
 657         if (rc)
 658                 CERROR("Get max cookiesize error rc %d\n", rc);
 659
 660         return rc;
 661 }
 662
 663 int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 664 {
 665         int size, rc;
 666
 667         size = sizeof(int);
 668         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_COOKIESIZE),
 669                           KEY_DEFAULT_COOKIESIZE, &size, lmmsize, NULL);
 670         if (rc)
 671                 CERROR("Get default cookiesize error rc %d\n", rc);
 672
 673         return rc;
 674 }
 675
 676 static void ll_dump_inode(struct inode *inode)
 677 {
 678         struct ll_d_hlist_node *tmp;
 679         int dentry_count = 0;
 680
 681         LASSERT(inode != NULL);
 682
 683         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 684                 dentry_count++;
 685
 686         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 687                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 688                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 689 }
 690
 691 void lustre_dump_dentry(struct dentry *dentry, int recur)
 692 {
 693         struct list_head *tmp;
 694         int subdirs = 0;
 695
 696         LASSERT(dentry != NULL);
 697
 698         list_for_each(tmp, &dentry->d_subdirs)
 699                 subdirs++;
 700
 701         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 702                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 703                dentry->d_name.len, dentry->d_name.name,
 704                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 705                dentry->d_parent, dentry->d_inode, d_count(dentry),
 706                dentry->d_flags, dentry->d_fsdata, subdirs);
 707         if (dentry->d_inode != NULL)
 708                 ll_dump_inode(dentry->d_inode);
 709
 710         if (recur == 0)
 711                 return;
 712
 713         list_for_each(tmp, &dentry->d_subdirs) {
 714                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 715                 lustre_dump_dentry(d, recur - 1);
 716         }
 717 }
 718
 719 static void client_common_put_super(struct super_block *sb)
 720 {
 721         struct ll_sb_info *sbi = ll_s2sbi(sb);
 722
 723 #ifdef CONFIG_FS_POSIX_ACL
 724         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 725                 et_fini(&sbi->ll_et);
 726                 rct_fini(&sbi->ll_rct);
 727         }
 728 #endif
 729
 730         ll_close_thread_shutdown(sbi->ll_lcq);
 731
 732         cl_sb_fini(sb);
 733
 734         list_del(&sbi->ll_conn_chain);
 735
 736         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 737         obd_disconnect(sbi->ll_dt_exp);
 738         sbi->ll_dt_exp = NULL;
 739         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 740          * see LU-2543. */
 741         obd_zombie_barrier();
 742
 743         lprocfs_unregister_mountpoint(sbi);
 744
 745         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 746         obd_disconnect(sbi->ll_md_exp);
 747         sbi->ll_md_exp = NULL;
 748 }
 749
 750 void ll_kill_super(struct super_block *sb)
 751 {
 752         struct ll_sb_info *sbi;
 753
 754         /* not init sb ?*/
 755         if (!(sb->s_flags & MS_ACTIVE))
 756                 return;
 757
 758         sbi = ll_s2sbi(sb);
 759         /* we need to restore s_dev from changed for clustered NFS before put_super
 760          * because new kernels have cached s_dev and change sb->s_dev in
 761          * put_super not affected real removing devices */
 762         if (sbi) {
 763                 sb->s_dev = sbi->ll_sdev_orig;
 764                 sbi->ll_umounting = 1;
 765         }
 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
 782         if (!options)
 783                 return 0;
 784
 785         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 786
 787         while (*s1) {
 788                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 789                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 790                 if (tmp) {
 791                         *flags |= tmp;
 792                         goto next;
 793                 }
 794                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 795                 if (tmp) {
 796                         *flags |= tmp;
 797                         goto next;
 798                 }
 799                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 800                 if (tmp) {
 801                         *flags |= tmp;
 802                         goto next;
 803                 }
 804                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 805                 if (tmp) {
 806                         *flags &= ~tmp;
 807                         goto next;
 808                 }
 809                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 810                 if (tmp) {
 811                         *flags |= tmp;
 812                         goto next;
 813                 }
 814                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 815                 if (tmp) {
 816                         *flags &= ~tmp;
 817                         goto next;
 818                 }
 819 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 820                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 821                 if (tmp) {
 822                         /* Ignore deprecated mount option.  The client will
 823                          * always try to mount with ACL support, whether this
 824                          * is used depends on whether server supports it. */
 825                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 826                                                   "mount option 'acl'.\n");
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 830                 if (tmp) {
 831                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 832                                                   "mount option 'noacl'.\n");
 833                         goto next;
 834                 }
 835 #else
 836 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 837 #endif
 838                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 839                 if (tmp) {
 840                         *flags |= tmp;
 841                         goto next;
 842                 }
 843                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 844                 if (tmp) {
 845                         *flags |= tmp;
 846                         goto next;
 847                 }
 848                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 849                 if (tmp) {
 850                         *flags &= ~tmp;
 851                         goto next;
 852                 }
 853
 854                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 860                 if (tmp) {
 861                         *flags &= ~tmp;
 862                         goto next;
 863                 }
 864                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 870                 if (tmp) {
 871                         *flags &= ~tmp;
 872                         goto next;
 873                 }
 874                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 875                 if (tmp) {
 876                         *flags |= tmp;
 877                         goto next;
 878                 }
 879                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 880                 if (tmp) {
 881                         *flags &= ~tmp;
 882                         goto next;
 883                 }
 884                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 885                 if (tmp) {
 886                         *flags |= tmp;
 887                         goto next;
 888                 }
 889                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 890                 if (tmp) {
 891                         *flags |= tmp;
 892                         goto next;
 893                 }
 894                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 895                 if (tmp) {
 896                         *flags |= tmp;
 897                         goto next;
 898                 }
 899                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 900                 if (tmp) {
 901                         *flags &= ~tmp;
 902                         goto next;
 903                 }
 904                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 905                                    s1);
 906                 return -EINVAL;
 907
 908 next:
 909                 /* Find next opt */
 910                 s2 = strchr(s1, ',');
 911                 if (s2 == NULL)
 912                         break;
 913                 s1 = s2 + 1;
 914         }
 915         return 0;
 916 }
 917
 918 void ll_lli_init(struct ll_inode_info *lli)
 919 {
 920         lli->lli_inode_magic = LLI_INODE_MAGIC;
 921         lli->lli_flags = 0;
 922         lli->lli_ioepoch = 0;
 923         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 924         spin_lock_init(&lli->lli_lock);
 925         lli->lli_posix_acl = NULL;
 926         lli->lli_remote_perms = NULL;
 927         mutex_init(&lli->lli_rmtperm_mutex);
 928         /* Do not set lli_fid, it has been initialized already. */
 929         fid_zero(&lli->lli_pfid);
 930         INIT_LIST_HEAD(&lli->lli_close_list);
 931         INIT_LIST_HEAD(&lli->lli_oss_capas);
 932         atomic_set(&lli->lli_open_count, 0);
 933         lli->lli_mds_capa = NULL;
 934         lli->lli_rmtperm_time = 0;
 935         lli->lli_pending_och = NULL;
 936         lli->lli_mds_read_och = NULL;
 937         lli->lli_mds_write_och = NULL;
 938         lli->lli_mds_exec_och = NULL;
 939         lli->lli_open_fd_read_count = 0;
 940         lli->lli_open_fd_write_count = 0;
 941         lli->lli_open_fd_exec_count = 0;
 942         mutex_init(&lli->lli_och_mutex);
 943         spin_lock_init(&lli->lli_agl_lock);
 944         lli->lli_has_smd = false;
 945         spin_lock_init(&lli->lli_layout_lock);
 946         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 947         lli->lli_clob = NULL;
 948
 949         init_rwsem(&lli->lli_xattrs_list_rwsem);
 950         mutex_init(&lli->lli_xattrs_enq_lock);
 951
 952         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 953         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 954                 mutex_init(&lli->lli_readdir_mutex);
 955                 lli->lli_opendir_key = NULL;
 956                 lli->lli_sai = NULL;
 957                 spin_lock_init(&lli->lli_sa_lock);
 958                 lli->lli_opendir_pid = 0;
 959         } else {
 960                 mutex_init(&lli->lli_size_mutex);
 961                 lli->lli_symlink_name = NULL;
 962                 init_rwsem(&lli->lli_trunc_sem);
 963                 mutex_init(&lli->lli_write_mutex);
 964                 init_rwsem(&lli->lli_glimpse_sem);
 965                 lli->lli_glimpse_time = 0;
 966                 INIT_LIST_HEAD(&lli->lli_agl_list);
 967                 lli->lli_agl_index = 0;
 968                 lli->lli_async_rc = 0;
 969         }
 970         mutex_init(&lli->lli_layout_mutex);
 971 }
 972
 973 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 974 {
 975         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 976
 977         bdi->name = "lustre";
 978         return bdi_register(bdi, NULL, "lustre-%d",
 979                             atomic_inc_return(&ll_bdi_num));
 980 }
 981
 982 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 983 {
 984         struct lustre_profile *lprof = NULL;
 985         struct lustre_sb_info *lsi = s2lsi(sb);
 986         struct ll_sb_info *sbi;
 987         char  *dt = NULL, *md = NULL;
 988         char  *profilenm = get_profile_name(sb);
 989         struct config_llog_instance *cfg;
 990         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 991         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 992         int    err;
 993
 994         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 995
 996         cfg = kzalloc(sizeof(*cfg), GFP_NOFS);
 997         if (!cfg)
 998                 return -ENOMEM;
 999
1000         try_module_get(THIS_MODULE);
1001
1002         /* client additional sb info */
1003         lsi->lsi_llsbi = sbi = ll_init_sbi();
1004         if (!sbi) {
1005                 module_put(THIS_MODULE);
1006                 OBD_FREE_PTR(cfg);
1007                 return -ENOMEM;
1008         }
1009
1010         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1011         if (err)
1012                 goto out_free;
1013
1014         err = bdi_init(&lsi->lsi_bdi);
1015         if (err)
1016                 goto out_free;
1017         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1018         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1019         err = ll_bdi_register(&lsi->lsi_bdi);
1020         if (err)
1021                 goto out_free;
1022
1023         sb->s_bdi = &lsi->lsi_bdi;
1024         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1025         sb->s_d_op = &ll_d_ops;
1026
1027         /* Generate a string unique to this super, in case some joker tries
1028            to mount the same fs at two mount points.
1029            Use the address of the super itself.*/
1030         cfg->cfg_instance = sb;
1031         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1032         cfg->cfg_callback = class_config_llog_handler;
1033         /* set up client obds */
1034         err = lustre_process_log(sb, profilenm, cfg);
1035         if (err < 0) {
1036                 CERROR("Unable to process log: %d\n", err);
1037                 goto out_free;
1038         }
1039
1040         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1041         lprof = class_get_profile(profilenm);
1042         if (lprof == NULL) {
1043                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1044                                    " read from the MGS.  Does that filesystem "
1045                                    "exist?\n", profilenm);
1046                 err = -EINVAL;
1047                 goto out_free;
1048         }
1049         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1050                lprof->lp_md, lprof->lp_dt);
1051
1052         dt = kzalloc(strlen(lprof->lp_dt) + instlen + 2, GFP_NOFS);
1053         if (!dt) {
1054                 err = -ENOMEM;
1055                 goto out_free;
1056         }
1057         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1058
1059         md = kzalloc(strlen(lprof->lp_md) + instlen + 2, GFP_NOFS);
1060         if (!md) {
1061                 err = -ENOMEM;
1062                 goto out_free;
1063         }
1064         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1065
1066         /* connections, registrations, sb setup */
1067         err = client_common_fill_super(sb, md, dt, mnt);
1068
1069 out_free:
1070         if (md)
1071                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1072         if (dt)
1073                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1074         if (err)
1075                 ll_put_super(sb);
1076         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1077                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1078
1079         OBD_FREE_PTR(cfg);
1080         return err;
1081 } /* ll_fill_super */
1082
1083 void ll_put_super(struct super_block *sb)
1084 {
1085         struct config_llog_instance cfg, params_cfg;
1086         struct obd_device *obd;
1087         struct lustre_sb_info *lsi = s2lsi(sb);
1088         struct ll_sb_info *sbi = ll_s2sbi(sb);
1089         char *profilenm = get_profile_name(sb);
1090         int next, force = 1;
1091
1092         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1093
1094         ll_print_capa_stat(sbi);
1095
1096         cfg.cfg_instance = sb;
1097         lustre_end_log(sb, profilenm, &cfg);
1098
1099         params_cfg.cfg_instance = sb;
1100         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1101
1102         if (sbi->ll_md_exp) {
1103                 obd = class_exp2obd(sbi->ll_md_exp);
1104                 if (obd)
1105                         force = obd->obd_force;
1106         }
1107
1108         /* We need to set force before the lov_disconnect in
1109            lustre_common_put_super, since l_d cleans up osc's as well. */
1110         if (force) {
1111                 next = 0;
1112                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1113                                                      &next)) != NULL) {
1114                         obd->obd_force = force;
1115                 }
1116         }
1117
1118         if (sbi->ll_lcq) {
1119                 /* Only if client_common_fill_super succeeded */
1120                 client_common_put_super(sb);
1121         }
1122
1123         next = 0;
1124         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1125                 class_manual_cleanup(obd);
1126         }
1127
1128         if (sbi->ll_flags & LL_SBI_VERBOSE)
1129                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1130
1131         if (profilenm)
1132                 class_del_profile(profilenm);
1133
1134         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1135                 bdi_destroy(&lsi->lsi_bdi);
1136                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1137         }
1138
1139         ll_free_sbi(sb);
1140         lsi->lsi_llsbi = NULL;
1141
1142         lustre_common_put_super(sb);
1143
1144         module_put(THIS_MODULE);
1145 } /* client_put_super */
1146
1147 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1148 {
1149         struct inode *inode = NULL;
1150
1151         /* NOTE: we depend on atomic igrab() -bzzz */
1152         lock_res_and_lock(lock);
1153         if (lock->l_resource->lr_lvb_inode) {
1154                 struct ll_inode_info *lli;
1155                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1156                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1157                         inode = igrab(lock->l_resource->lr_lvb_inode);
1158                 } else {
1159                         inode = lock->l_resource->lr_lvb_inode;
1160                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1161                                          D_WARNING, lock, "lr_lvb_inode %p is "
1162                                          "bogus: magic %08x",
1163                                          lock->l_resource->lr_lvb_inode,
1164                                          lli->lli_inode_magic);
1165                         inode = NULL;
1166                 }
1167         }
1168         unlock_res_and_lock(lock);
1169         return inode;
1170 }
1171
1172 void ll_clear_inode(struct inode *inode)
1173 {
1174         struct ll_inode_info *lli = ll_i2info(inode);
1175         struct ll_sb_info *sbi = ll_i2sbi(inode);
1176
1177         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1178                inode->i_generation, inode);
1179
1180         if (S_ISDIR(inode->i_mode)) {
1181                 /* these should have been cleared in ll_file_release */
1182                 LASSERT(lli->lli_opendir_key == NULL);
1183                 LASSERT(lli->lli_sai == NULL);
1184                 LASSERT(lli->lli_opendir_pid == 0);
1185         }
1186
1187         spin_lock(&lli->lli_lock);
1188         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1189         spin_unlock(&lli->lli_lock);
1190         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1191
1192         LASSERT(!lli->lli_open_fd_write_count);
1193         LASSERT(!lli->lli_open_fd_read_count);
1194         LASSERT(!lli->lli_open_fd_exec_count);
1195
1196         if (lli->lli_mds_write_och)
1197                 ll_md_real_close(inode, FMODE_WRITE);
1198         if (lli->lli_mds_exec_och)
1199                 ll_md_real_close(inode, FMODE_EXEC);
1200         if (lli->lli_mds_read_och)
1201                 ll_md_real_close(inode, FMODE_READ);
1202
1203         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1204                 OBD_FREE(lli->lli_symlink_name,
1205                          strlen(lli->lli_symlink_name) + 1);
1206                 lli->lli_symlink_name = NULL;
1207         }
1208
1209         ll_xattr_cache_destroy(inode);
1210
1211         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1212                 LASSERT(lli->lli_posix_acl == NULL);
1213                 if (lli->lli_remote_perms) {
1214                         free_rmtperm_hash(lli->lli_remote_perms);
1215                         lli->lli_remote_perms = NULL;
1216                 }
1217         }
1218 #ifdef CONFIG_FS_POSIX_ACL
1219         else if (lli->lli_posix_acl) {
1220                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1221                 LASSERT(lli->lli_remote_perms == NULL);
1222                 posix_acl_release(lli->lli_posix_acl);
1223                 lli->lli_posix_acl = NULL;
1224         }
1225 #endif
1226         lli->lli_inode_magic = LLI_INODE_DEAD;
1227
1228         ll_clear_inode_capas(inode);
1229         if (!S_ISDIR(inode->i_mode))
1230                 LASSERT(list_empty(&lli->lli_agl_list));
1231
1232         /*
1233          * XXX This has to be done before lsm is freed below, because
1234          * cl_object still uses inode lsm.
1235          */
1236         cl_inode_fini(inode);
1237         lli->lli_has_smd = false;
1238 }
1239
1240 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1241                   struct md_open_data **mod)
1242 {
1243         struct lustre_md md;
1244         struct inode *inode = dentry->d_inode;
1245         struct ll_sb_info *sbi = ll_i2sbi(inode);
1246         struct ptlrpc_request *request = NULL;
1247         int rc, ia_valid;
1248
1249         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1250                                      LUSTRE_OPC_ANY, NULL);
1251         if (IS_ERR(op_data))
1252                 return PTR_ERR(op_data);
1253
1254         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1255                         &request, mod);
1256         if (rc) {
1257                 ptlrpc_req_finished(request);
1258                 if (rc == -ENOENT) {
1259                         clear_nlink(inode);
1260                         /* Unlinked special device node? Or just a race?
1261                          * Pretend we done everything. */
1262                         if (!S_ISREG(inode->i_mode) &&
1263                             !S_ISDIR(inode->i_mode)) {
1264                                 ia_valid = op_data->op_attr.ia_valid;
1265                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1266                                 rc = simple_setattr(dentry, &op_data->op_attr);
1267                                 op_data->op_attr.ia_valid = ia_valid;
1268                         }
1269                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1270                         CERROR("md_setattr fails: rc = %d\n", rc);
1271                 }
1272                 return rc;
1273         }
1274
1275         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1276                               sbi->ll_md_exp, &md);
1277         if (rc) {
1278                 ptlrpc_req_finished(request);
1279                 return rc;
1280         }
1281
1282         ia_valid = op_data->op_attr.ia_valid;
1283         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1284          * cache is not cleared yet. */
1285         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1286         rc = simple_setattr(dentry, &op_data->op_attr);
1287         op_data->op_attr.ia_valid = ia_valid;
1288
1289         /* Extract epoch data if obtained. */
1290         op_data->op_handle = md.body->handle;
1291         op_data->op_ioepoch = md.body->ioepoch;
1292
1293         ll_update_inode(inode, &md);
1294         ptlrpc_req_finished(request);
1295
1296         return rc;
1297 }
1298
1299 /* Close IO epoch and send Size-on-MDS attribute update. */
1300 static int ll_setattr_done_writing(struct inode *inode,
1301                                    struct md_op_data *op_data,
1302                                    struct md_open_data *mod)
1303 {
1304         struct ll_inode_info *lli = ll_i2info(inode);
1305         int rc = 0;
1306
1307         LASSERT(op_data != NULL);
1308         if (!S_ISREG(inode->i_mode))
1309                 return 0;
1310
1311         CDEBUG(D_INODE, "Epoch %llu closed on "DFID" for truncate\n",
1312                op_data->op_ioepoch, PFID(&lli->lli_fid));
1313
1314         op_data->op_flags = MF_EPOCH_CLOSE;
1315         ll_done_writing_attr(inode, op_data);
1316         ll_pack_inode2opdata(inode, op_data, NULL);
1317
1318         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1319         if (rc == -EAGAIN) {
1320                 /* MDS has instructed us to obtain Size-on-MDS attribute
1321                  * from OSTs and send setattr to back to MDS. */
1322                 rc = ll_som_update(inode, op_data);
1323         } else if (rc) {
1324                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1325                        inode->i_ino, rc);
1326         }
1327         return rc;
1328 }
1329
1330 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1331 {
1332         struct obd_capa *capa;
1333         int rc;
1334
1335         if (attr->ia_valid & ATTR_SIZE)
1336                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1337         else
1338                 capa = ll_mdscapa_get(inode);
1339
1340         rc = cl_setattr_ost(inode, attr, capa);
1341
1342         if (attr->ia_valid & ATTR_SIZE)
1343                 ll_truncate_free_capa(capa);
1344         else
1345                 capa_put(capa);
1346
1347         return rc;
1348 }
1349
1350
1351 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1352  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1353  * keep these values until such a time that objects are allocated for it.
1354  * We do the MDS operations first, as it is checking permissions for us.
1355  * We don't to the MDS RPC if there is nothing that we want to store there,
1356  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1357  * going to do an RPC anyways.
1358  *
1359  * If we are doing a truncate, we will send the mtime and ctime updates
1360  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1361  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1362  * at the same time.
1363  *
1364  * In case of HSMimport, we only set attr on MDS.
1365  */
1366 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1367 {
1368         struct inode *inode = dentry->d_inode;
1369         struct ll_inode_info *lli = ll_i2info(inode);
1370         struct md_op_data *op_data = NULL;
1371         struct md_open_data *mod = NULL;
1372         bool file_is_released = false;
1373         int rc = 0, rc1 = 0;
1374
1375         CDEBUG(D_VFSTRACE,
1376                 "%s: setattr inode %p/fid:"DFID
1377                 " from %llu to %llu, valid %x, hsm_import %d\n",
1378                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1379                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1380                 attr->ia_valid, hsm_import);
1381
1382         if (attr->ia_valid & ATTR_SIZE) {
1383                 /* Check new size against VFS/VM file size limit and rlimit */
1384                 rc = inode_newsize_ok(inode, attr->ia_size);
1385                 if (rc)
1386                         return rc;
1387
1388                 /* The maximum Lustre file size is variable, based on the
1389                  * OST maximum object size and number of stripes.  This
1390                  * needs another check in addition to the VFS check above. */
1391                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1392                         CDEBUG(D_INODE, "file "DFID" too large %llu > %llu\n",
1393                                PFID(&lli->lli_fid), attr->ia_size,
1394                                ll_file_maxbytes(inode));
1395                         return -EFBIG;
1396                 }
1397
1398                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1399         }
1400
1401         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1402         if (attr->ia_valid & TIMES_SET_FLAGS) {
1403                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1404                     !capable(CFS_CAP_FOWNER))
1405                         return -EPERM;
1406         }
1407
1408         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1409         if (attr->ia_valid & ATTR_CTIME) {
1410                 attr->ia_ctime = CURRENT_TIME;
1411                 attr->ia_valid |= ATTR_CTIME_SET;
1412         }
1413         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1414             (attr->ia_valid & ATTR_ATIME)) {
1415                 attr->ia_atime = CURRENT_TIME;
1416                 attr->ia_valid |= ATTR_ATIME_SET;
1417         }
1418         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1419             (attr->ia_valid & ATTR_MTIME)) {
1420                 attr->ia_mtime = CURRENT_TIME;
1421                 attr->ia_valid |= ATTR_MTIME_SET;
1422         }
1423
1424         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1425                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1426                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1427                        get_seconds());
1428
1429         /* If we are changing file size, file content is modified, flag it. */
1430         if (attr->ia_valid & ATTR_SIZE) {
1431                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1432                 spin_lock(&lli->lli_lock);
1433                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1434                 spin_unlock(&lli->lli_lock);
1435         }
1436
1437         /* We always do an MDS RPC, even if we're only changing the size;
1438          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1439
1440         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1441         if (!op_data)
1442                 return -ENOMEM;
1443
1444         if (!S_ISDIR(inode->i_mode)) {
1445                 if (attr->ia_valid & ATTR_SIZE)
1446                         inode_dio_write_done(inode);
1447                 mutex_unlock(&inode->i_mutex);
1448         }
1449
1450         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1451
1452         /* Open epoch for truncate. */
1453         if (exp_connect_som(ll_i2mdexp(inode)) &&
1454             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1455                 op_data->op_flags = MF_EPOCH_OPEN;
1456
1457         /* truncate on a released file must failed with -ENODATA,
1458          * so size must not be set on MDS for released file
1459          * but other attributes must be set
1460          */
1461         if (S_ISREG(inode->i_mode)) {
1462                 struct lov_stripe_md *lsm;
1463                 __u32 gen;
1464
1465                 ll_layout_refresh(inode, &gen);
1466                 lsm = ccc_inode_lsm_get(inode);
1467                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1468                         file_is_released = true;
1469                 ccc_inode_lsm_put(inode, lsm);
1470         }
1471
1472         /* if not in HSM import mode, clear size attr for released file
1473          * we clear the attribute send to MDT in op_data, not the original
1474          * received from caller in attr which is used later to
1475          * decide return code */
1476         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1477                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1478
1479         rc = ll_md_setattr(dentry, op_data, &mod);
1480         if (rc)
1481                 goto out;
1482
1483         /* truncate failed (only when non HSM import), others succeed */
1484         if (file_is_released) {
1485                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1486                         rc = -ENODATA;
1487                 else
1488                         rc = 0;
1489                 goto out;
1490         }
1491
1492         /* RPC to MDT is sent, cancel data modification flag */
1493         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1494                 spin_lock(&lli->lli_lock);
1495                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1496                 spin_unlock(&lli->lli_lock);
1497         }
1498
1499         ll_ioepoch_open(lli, op_data->op_ioepoch);
1500         if (!S_ISREG(inode->i_mode)) {
1501                 rc = 0;
1502                 goto out;
1503         }
1504
1505         if (attr->ia_valid & (ATTR_SIZE |
1506                               ATTR_ATIME | ATTR_ATIME_SET |
1507                               ATTR_MTIME | ATTR_MTIME_SET))
1508                 /* For truncate and utimes sending attributes to OSTs, setting
1509                  * mtime/atime to the past will be performed under PW [0:EOF]
1510                  * extent lock (new_size:EOF for truncate).  It may seem
1511                  * excessive to send mtime/atime updates to OSTs when not
1512                  * setting times to past, but it is necessary due to possible
1513                  * time de-synchronization between MDT inode and OST objects */
1514                 if (attr->ia_valid & ATTR_SIZE)
1515                         down_write(&lli->lli_trunc_sem);
1516                 rc = ll_setattr_ost(inode, attr);
1517                 if (attr->ia_valid & ATTR_SIZE)
1518                         up_write(&lli->lli_trunc_sem);
1519 out:
1520         if (op_data) {
1521                 if (op_data->op_ioepoch) {
1522                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1523                         if (!rc)
1524                                 rc = rc1;
1525                 }
1526                 ll_finish_md_op_data(op_data);
1527         }
1528         if (!S_ISDIR(inode->i_mode)) {
1529                 mutex_lock(&inode->i_mutex);
1530                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1531                         inode_dio_wait(inode);
1532         }
1533
1534         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1535                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1536
1537         return rc;
1538 }
1539
1540 int ll_setattr(struct dentry *de, struct iattr *attr)
1541 {
1542         int mode = de->d_inode->i_mode;
1543
1544         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1545                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1546                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1547
1548         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1549                                (ATTR_SIZE|ATTR_MODE)) &&
1550             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1551              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1552               !(attr->ia_mode & S_ISGID))))
1553                 attr->ia_valid |= ATTR_FORCE;
1554
1555         if ((attr->ia_valid & ATTR_MODE) &&
1556             (mode & S_ISUID) &&
1557             !(attr->ia_mode & S_ISUID) &&
1558             !(attr->ia_valid & ATTR_KILL_SUID))
1559                 attr->ia_valid |= ATTR_KILL_SUID;
1560
1561         if ((attr->ia_valid & ATTR_MODE) &&
1562             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1563             !(attr->ia_mode & S_ISGID) &&
1564             !(attr->ia_valid & ATTR_KILL_SGID))
1565                 attr->ia_valid |= ATTR_KILL_SGID;
1566
1567         return ll_setattr_raw(de, attr, false);
1568 }
1569
1570 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1571                        __u64 max_age, __u32 flags)
1572 {
1573         struct ll_sb_info *sbi = ll_s2sbi(sb);
1574         struct obd_statfs obd_osfs;
1575         int rc;
1576
1577         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1578         if (rc) {
1579                 CERROR("md_statfs fails: rc = %d\n", rc);
1580                 return rc;
1581         }
1582
1583         osfs->os_type = sb->s_magic;
1584
1585         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1586                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,
1587                osfs->os_files);
1588
1589         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1590                 flags |= OBD_STATFS_NODELAY;
1591
1592         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1593         if (rc) {
1594                 CERROR("obd_statfs fails: rc = %d\n", rc);
1595                 return rc;
1596         }
1597
1598         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1599                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1600                obd_osfs.os_files);
1601
1602         osfs->os_bsize = obd_osfs.os_bsize;
1603         osfs->os_blocks = obd_osfs.os_blocks;
1604         osfs->os_bfree = obd_osfs.os_bfree;
1605         osfs->os_bavail = obd_osfs.os_bavail;
1606
1607         /* If we don't have as many objects free on the OST as inodes
1608          * on the MDS, we reduce the total number of inodes to
1609          * compensate, so that the "inodes in use" number is correct.
1610          */
1611         if (obd_osfs.os_ffree < osfs->os_ffree) {
1612                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1613                         obd_osfs.os_ffree;
1614                 osfs->os_ffree = obd_osfs.os_ffree;
1615         }
1616
1617         return rc;
1618 }
1619 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1620 {
1621         struct super_block *sb = de->d_sb;
1622         struct obd_statfs osfs;
1623         int rc;
1624
1625         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1626         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1627
1628         /* Some amount of caching on the client is allowed */
1629         rc = ll_statfs_internal(sb, &osfs,
1630                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1631                                 0);
1632         if (rc)
1633                 return rc;
1634
1635         statfs_unpack(sfs, &osfs);
1636
1637         /* We need to downshift for all 32-bit kernels, because we can't
1638          * tell if the kernel is being called via sys_statfs64() or not.
1639          * Stop before overflowing f_bsize - in which case it is better
1640          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1641         if (sizeof(long) < 8) {
1642                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1643                         sfs->f_bsize <<= 1;
1644
1645                         osfs.os_blocks >>= 1;
1646                         osfs.os_bfree >>= 1;
1647                         osfs.os_bavail >>= 1;
1648                 }
1649         }
1650
1651         sfs->f_blocks = osfs.os_blocks;
1652         sfs->f_bfree = osfs.os_bfree;
1653         sfs->f_bavail = osfs.os_bavail;
1654         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1655         return 0;
1656 }
1657
1658 void ll_inode_size_lock(struct inode *inode)
1659 {
1660         struct ll_inode_info *lli;
1661
1662         LASSERT(!S_ISDIR(inode->i_mode));
1663
1664         lli = ll_i2info(inode);
1665         mutex_lock(&lli->lli_size_mutex);
1666 }
1667
1668 void ll_inode_size_unlock(struct inode *inode)
1669 {
1670         struct ll_inode_info *lli;
1671
1672         lli = ll_i2info(inode);
1673         mutex_unlock(&lli->lli_size_mutex);
1674 }
1675
1676 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1677 {
1678         struct ll_inode_info *lli = ll_i2info(inode);
1679         struct mdt_body *body = md->body;
1680         struct lov_stripe_md *lsm = md->lsm;
1681         struct ll_sb_info *sbi = ll_i2sbi(inode);
1682
1683         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1684         if (lsm != NULL) {
1685                 if (!lli->lli_has_smd &&
1686                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1687                         cl_file_inode_init(inode, md);
1688
1689                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1690                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1691                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1692         }
1693
1694         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1695                 if (body->valid & OBD_MD_FLRMTPERM)
1696                         ll_update_remote_perm(inode, md->remote_perm);
1697         }
1698 #ifdef CONFIG_FS_POSIX_ACL
1699         else if (body->valid & OBD_MD_FLACL) {
1700                 spin_lock(&lli->lli_lock);
1701                 if (lli->lli_posix_acl)
1702                         posix_acl_release(lli->lli_posix_acl);
1703                 lli->lli_posix_acl = md->posix_acl;
1704                 spin_unlock(&lli->lli_lock);
1705         }
1706 #endif
1707         inode->i_ino = cl_fid_build_ino(&body->fid1,
1708                                         sbi->ll_flags & LL_SBI_32BIT_API);
1709         inode->i_generation = cl_fid_build_gen(&body->fid1);
1710
1711         if (body->valid & OBD_MD_FLATIME) {
1712                 if (body->atime > LTIME_S(inode->i_atime))
1713                         LTIME_S(inode->i_atime) = body->atime;
1714                 lli->lli_lvb.lvb_atime = body->atime;
1715         }
1716         if (body->valid & OBD_MD_FLMTIME) {
1717                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1718                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
1719                                inode->i_ino, LTIME_S(inode->i_mtime),
1720                                body->mtime);
1721                         LTIME_S(inode->i_mtime) = body->mtime;
1722                 }
1723                 lli->lli_lvb.lvb_mtime = body->mtime;
1724         }
1725         if (body->valid & OBD_MD_FLCTIME) {
1726                 if (body->ctime > LTIME_S(inode->i_ctime))
1727                         LTIME_S(inode->i_ctime) = body->ctime;
1728                 lli->lli_lvb.lvb_ctime = body->ctime;
1729         }
1730         if (body->valid & OBD_MD_FLMODE)
1731                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1732         if (body->valid & OBD_MD_FLTYPE)
1733                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1734         LASSERT(inode->i_mode != 0);
1735         if (S_ISREG(inode->i_mode)) {
1736                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1737         } else {
1738                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1739         }
1740         if (body->valid & OBD_MD_FLUID)
1741                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1742         if (body->valid & OBD_MD_FLGID)
1743                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1744         if (body->valid & OBD_MD_FLFLAGS)
1745                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1746         if (body->valid & OBD_MD_FLNLINK)
1747                 set_nlink(inode, body->nlink);
1748         if (body->valid & OBD_MD_FLRDEV)
1749                 inode->i_rdev = old_decode_dev(body->rdev);
1750
1751         if (body->valid & OBD_MD_FLID) {
1752                 /* FID shouldn't be changed! */
1753                 if (fid_is_sane(&lli->lli_fid)) {
1754                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1755                                  "Trying to change FID "DFID
1756                                  " to the "DFID", inode %lu/%u(%p)\n",
1757                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1758                                  inode->i_ino, inode->i_generation, inode);
1759                 } else
1760                         lli->lli_fid = body->fid1;
1761         }
1762
1763         LASSERT(fid_seq(&lli->lli_fid) != 0);
1764
1765         if (body->valid & OBD_MD_FLSIZE) {
1766                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1767                     S_ISREG(inode->i_mode)) {
1768                         struct lustre_handle lockh;
1769                         ldlm_mode_t mode;
1770
1771                         /* As it is possible a blocking ast has been processed
1772                          * by this time, we need to check there is an UPDATE
1773                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1774                          * it. */
1775                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1776                                                &lockh, LDLM_FL_CBPENDING,
1777                                                LCK_CR | LCK_CW |
1778                                                LCK_PR | LCK_PW);
1779                         if (mode) {
1780                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1781                                                       LLIF_EPOCH_PENDING |
1782                                                       LLIF_SOM_DIRTY)) {
1783                                         CERROR("ino %lu flags %u still has "
1784                                                "size authority! do not trust "
1785                                                "the size got from MDS\n",
1786                                                inode->i_ino, lli->lli_flags);
1787                                 } else {
1788                                         /* Use old size assignment to avoid
1789                                          * deadlock bz14138 & bz14326 */
1790                                         i_size_write(inode, body->size);
1791                                         spin_lock(&lli->lli_lock);
1792                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1793                                         spin_unlock(&lli->lli_lock);
1794                                 }
1795                                 ldlm_lock_decref(&lockh, mode);
1796                         }
1797                 } else {
1798                         /* Use old size assignment to avoid
1799                          * deadlock bz14138 & bz14326 */
1800                         i_size_write(inode, body->size);
1801
1802                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1803                                inode->i_ino, (unsigned long long)body->size);
1804                 }
1805
1806                 if (body->valid & OBD_MD_FLBLOCKS)
1807                         inode->i_blocks = body->blocks;
1808         }
1809
1810         if (body->valid & OBD_MD_FLMDSCAPA) {
1811                 LASSERT(md->mds_capa);
1812                 ll_add_capa(inode, md->mds_capa);
1813         }
1814         if (body->valid & OBD_MD_FLOSSCAPA) {
1815                 LASSERT(md->oss_capa);
1816                 ll_add_capa(inode, md->oss_capa);
1817         }
1818
1819         if (body->valid & OBD_MD_TSTATE) {
1820                 if (body->t_state & MS_RESTORE)
1821                         lli->lli_flags |= LLIF_FILE_RESTORING;
1822         }
1823 }
1824
1825 void ll_read_inode2(struct inode *inode, void *opaque)
1826 {
1827         struct lustre_md *md = opaque;
1828         struct ll_inode_info *lli = ll_i2info(inode);
1829
1830         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1831                PFID(&lli->lli_fid), inode);
1832
1833         LASSERT(!lli->lli_has_smd);
1834
1835         /* Core attributes from the MDS first.  This is a new inode, and
1836          * the VFS doesn't zero times in the core inode so we have to do
1837          * it ourselves.  They will be overwritten by either MDS or OST
1838          * attributes - we just need to make sure they aren't newer. */
1839         LTIME_S(inode->i_mtime) = 0;
1840         LTIME_S(inode->i_atime) = 0;
1841         LTIME_S(inode->i_ctime) = 0;
1842         inode->i_rdev = 0;
1843         ll_update_inode(inode, md);
1844
1845         /* OIDEBUG(inode); */
1846
1847         /* initializing backing dev info. */
1848         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1849
1850
1851         if (S_ISREG(inode->i_mode)) {
1852                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1853                 inode->i_op = &ll_file_inode_operations;
1854                 inode->i_fop = sbi->ll_fop;
1855                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1856         } else if (S_ISDIR(inode->i_mode)) {
1857                 inode->i_op = &ll_dir_inode_operations;
1858                 inode->i_fop = &ll_dir_operations;
1859         } else if (S_ISLNK(inode->i_mode)) {
1860                 inode->i_op = &ll_fast_symlink_inode_operations;
1861         } else {
1862                 inode->i_op = &ll_special_inode_operations;
1863
1864                 init_special_inode(inode, inode->i_mode,
1865                                    inode->i_rdev);
1866         }
1867 }
1868
1869 void ll_delete_inode(struct inode *inode)
1870 {
1871         struct cl_inode_info *lli = cl_i2info(inode);
1872
1873         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1874                 /* discard all dirty pages before truncating them, required by
1875                  * osc_extent implementation at LU-1030. */
1876                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1877                                    CL_FSYNC_DISCARD, 1);
1878
1879         truncate_inode_pages_final(&inode->i_data);
1880
1881         /* Workaround for LU-118 */
1882         if (inode->i_data.nrpages) {
1883                 TREE_READ_LOCK_IRQ(&inode->i_data);
1884                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1885                 LASSERTF(inode->i_data.nrpages == 0,
1886                          "inode=%lu/%u(%p) nrpages=%lu, see "
1887                          "http://jira.whamcloud.com/browse/LU-118\n",
1888                          inode->i_ino, inode->i_generation, inode,
1889                          inode->i_data.nrpages);
1890         }
1891         /* Workaround end */
1892
1893         ll_clear_inode(inode);
1894         clear_inode(inode);
1895 }
1896
1897 int ll_iocontrol(struct inode *inode, struct file *file,
1898                  unsigned int cmd, unsigned long arg)
1899 {
1900         struct ll_sb_info *sbi = ll_i2sbi(inode);
1901         struct ptlrpc_request *req = NULL;
1902         int rc, flags = 0;
1903
1904         switch (cmd) {
1905         case FSFILT_IOC_GETFLAGS: {
1906                 struct mdt_body *body;
1907                 struct md_op_data *op_data;
1908
1909                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1910                                              0, 0, LUSTRE_OPC_ANY,
1911                                              NULL);
1912                 if (IS_ERR(op_data))
1913                         return PTR_ERR(op_data);
1914
1915                 op_data->op_valid = OBD_MD_FLFLAGS;
1916                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1917                 ll_finish_md_op_data(op_data);
1918                 if (rc) {
1919                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1920                         return -abs(rc);
1921                 }
1922
1923                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1924
1925                 flags = body->flags;
1926
1927                 ptlrpc_req_finished(req);
1928
1929                 return put_user(flags, (int *)arg);
1930         }
1931         case FSFILT_IOC_SETFLAGS: {
1932                 struct lov_stripe_md *lsm;
1933                 struct obd_info oinfo = { { { 0 } } };
1934                 struct md_op_data *op_data;
1935
1936                 if (get_user(flags, (int *)arg))
1937                         return -EFAULT;
1938
1939                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1940                                              LUSTRE_OPC_ANY, NULL);
1941                 if (IS_ERR(op_data))
1942                         return PTR_ERR(op_data);
1943
1944                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1945                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1946                 rc = md_setattr(sbi->ll_md_exp, op_data,
1947                                 NULL, 0, NULL, 0, &req, NULL);
1948                 ll_finish_md_op_data(op_data);
1949                 ptlrpc_req_finished(req);
1950                 if (rc)
1951                         return rc;
1952
1953                 inode->i_flags = ll_ext_to_inode_flags(flags);
1954
1955                 lsm = ccc_inode_lsm_get(inode);
1956                 if (!lsm_has_objects(lsm)) {
1957                         ccc_inode_lsm_put(inode, lsm);
1958                         return 0;
1959                 }
1960
1961                 OBDO_ALLOC(oinfo.oi_oa);
1962                 if (!oinfo.oi_oa) {
1963                         ccc_inode_lsm_put(inode, lsm);
1964                         return -ENOMEM;
1965                 }
1966                 oinfo.oi_md = lsm;
1967                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1968                 oinfo.oi_oa->o_flags = flags;
1969                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1970                                        OBD_MD_FLGROUP;
1971                 oinfo.oi_capa = ll_mdscapa_get(inode);
1972                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1973                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1974                 capa_put(oinfo.oi_capa);
1975                 OBDO_FREE(oinfo.oi_oa);
1976                 ccc_inode_lsm_put(inode, lsm);
1977
1978                 if (rc && rc != -EPERM && rc != -EACCES)
1979                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1980
1981                 return rc;
1982         }
1983         default:
1984                 return -ENOSYS;
1985         }
1986
1987         return 0;
1988 }
1989
1990 int ll_flush_ctx(struct inode *inode)
1991 {
1992         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1993
1994         CDEBUG(D_SEC, "flush context for user %d\n",
1995                       from_kuid(&init_user_ns, current_uid()));
1996
1997         obd_set_info_async(NULL, sbi->ll_md_exp,
1998                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1999                            0, NULL, NULL);
2000         obd_set_info_async(NULL, sbi->ll_dt_exp,
2001                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2002                            0, NULL, NULL);
2003         return 0;
2004 }
2005
2006 /* umount -f client means force down, don't save state */
2007 void ll_umount_begin(struct super_block *sb)
2008 {
2009         struct ll_sb_info *sbi = ll_s2sbi(sb);
2010         struct obd_device *obd;
2011         struct obd_ioctl_data *ioc_data;
2012
2013         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2014                sb->s_count, atomic_read(&sb->s_active));
2015
2016         obd = class_exp2obd(sbi->ll_md_exp);
2017         if (obd == NULL) {
2018                 CERROR("Invalid MDC connection handle %#llx\n",
2019                        sbi->ll_md_exp->exp_handle.h_cookie);
2020                 return;
2021         }
2022         obd->obd_force = 1;
2023
2024         obd = class_exp2obd(sbi->ll_dt_exp);
2025         if (obd == NULL) {
2026                 CERROR("Invalid LOV connection handle %#llx\n",
2027                        sbi->ll_dt_exp->exp_handle.h_cookie);
2028                 return;
2029         }
2030         obd->obd_force = 1;
2031
2032         ioc_data = kzalloc(sizeof(*ioc_data), GFP_NOFS);
2033         if (ioc_data) {
2034                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2035                               sizeof(*ioc_data), ioc_data, NULL);
2036
2037                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2038                               sizeof(*ioc_data), ioc_data, NULL);
2039
2040                 OBD_FREE_PTR(ioc_data);
2041         }
2042
2043         /* Really, we'd like to wait until there are no requests outstanding,
2044          * and then continue.  For now, we just invalidate the requests,
2045          * schedule() and sleep one second if needed, and hope.
2046          */
2047         schedule();
2048 }
2049
2050 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2051 {
2052         struct ll_sb_info *sbi = ll_s2sbi(sb);
2053         char *profilenm = get_profile_name(sb);
2054         int err;
2055         __u32 read_only;
2056
2057         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2058                 read_only = *flags & MS_RDONLY;
2059                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2060                                          sizeof(KEY_READ_ONLY),
2061                                          KEY_READ_ONLY, sizeof(read_only),
2062                                          &read_only, NULL);
2063                 if (err) {
2064                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2065                                       profilenm, read_only ?
2066                                       "read-only" : "read-write", err);
2067                         return err;
2068                 }
2069
2070                 if (read_only)
2071                         sb->s_flags |= MS_RDONLY;
2072                 else
2073                         sb->s_flags &= ~MS_RDONLY;
2074
2075                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2076                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2077                                       read_only ?  "read-only" : "read-write");
2078         }
2079         return 0;
2080 }
2081
2082 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2083                   struct super_block *sb, struct lookup_intent *it)
2084 {
2085         struct ll_sb_info *sbi = NULL;
2086         struct lustre_md md;
2087         int rc;
2088
2089         LASSERT(*inode || sb);
2090         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2091         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2092                               sbi->ll_md_exp, &md);
2093         if (rc)
2094                 return rc;
2095
2096         if (*inode) {
2097                 ll_update_inode(*inode, &md);
2098         } else {
2099                 LASSERT(sb != NULL);
2100
2101                 /*
2102                  * At this point server returns to client's same fid as client
2103                  * generated for creating. So using ->fid1 is okay here.
2104                  */
2105                 LASSERT(fid_is_sane(&md.body->fid1));
2106
2107                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2108                                              sbi->ll_flags & LL_SBI_32BIT_API),
2109                                  &md);
2110                 if (*inode == NULL || IS_ERR(*inode)) {
2111 #ifdef CONFIG_FS_POSIX_ACL
2112                         if (md.posix_acl) {
2113                                 posix_acl_release(md.posix_acl);
2114                                 md.posix_acl = NULL;
2115                         }
2116 #endif
2117                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2118                         *inode = NULL;
2119                         CERROR("new_inode -fatal: rc %d\n", rc);
2120                         goto out;
2121                 }
2122         }
2123
2124         /* Handling piggyback layout lock.
2125          * Layout lock can be piggybacked by getattr and open request.
2126          * The lsm can be applied to inode only if it comes with a layout lock
2127          * otherwise correct layout may be overwritten, for example:
2128          * 1. proc1: mdt returns a lsm but not granting layout
2129          * 2. layout was changed by another client
2130          * 3. proc2: refresh layout and layout lock granted
2131          * 4. proc1: to apply a stale layout */
2132         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2133                 struct lustre_handle lockh;
2134                 struct ldlm_lock *lock;
2135
2136                 lockh.cookie = it->d.lustre.it_lock_handle;
2137                 lock = ldlm_handle2lock(&lockh);
2138                 LASSERT(lock != NULL);
2139                 if (ldlm_has_layout(lock)) {
2140                         struct cl_object_conf conf;
2141
2142                         memset(&conf, 0, sizeof(conf));
2143                         conf.coc_opc = OBJECT_CONF_SET;
2144                         conf.coc_inode = *inode;
2145                         conf.coc_lock = lock;
2146                         conf.u.coc_md = &md;
2147                         (void)ll_layout_conf(*inode, &conf);
2148                 }
2149                 LDLM_LOCK_PUT(lock);
2150         }
2151
2152 out:
2153         if (md.lsm != NULL)
2154                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2155         md_free_lustre_md(sbi->ll_md_exp, &md);
2156         return rc;
2157 }
2158
2159 int ll_obd_statfs(struct inode *inode, void *arg)
2160 {
2161         struct ll_sb_info *sbi = NULL;
2162         struct obd_export *exp;
2163         char *buf = NULL;
2164         struct obd_ioctl_data *data = NULL;
2165         __u32 type;
2166         __u32 flags;
2167         int len = 0, rc;
2168
2169         if (!inode || !(sbi = ll_i2sbi(inode))) {
2170                 rc = -EINVAL;
2171                 goto out_statfs;
2172         }
2173
2174         rc = obd_ioctl_getdata(&buf, &len, arg);
2175         if (rc)
2176                 goto out_statfs;
2177
2178         data = (void *)buf;
2179         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2180             !data->ioc_pbuf1 || !data->ioc_pbuf2) {
2181                 rc = -EINVAL;
2182                 goto out_statfs;
2183         }
2184
2185         if (data->ioc_inllen1 != sizeof(__u32) ||
2186             data->ioc_inllen2 != sizeof(__u32) ||
2187             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2188             data->ioc_plen2 != sizeof(struct obd_uuid)) {
2189                 rc = -EINVAL;
2190                 goto out_statfs;
2191         }
2192
2193         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2194         if (type & LL_STATFS_LMV)
2195                 exp = sbi->ll_md_exp;
2196         else if (type & LL_STATFS_LOV)
2197                 exp = sbi->ll_dt_exp;
2198         else {
2199                 rc = -ENODEV;
2200                 goto out_statfs;
2201         }
2202
2203         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2204         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2205         if (rc)
2206                 goto out_statfs;
2207 out_statfs:
2208         if (buf)
2209                 obd_ioctl_freedata(buf, len);
2210         return rc;
2211 }
2212
2213 int ll_process_config(struct lustre_cfg *lcfg)
2214 {
2215         char *ptr;
2216         void *sb;
2217         struct lprocfs_static_vars lvars;
2218         unsigned long x;
2219         int rc = 0;
2220
2221         lprocfs_llite_init_vars(&lvars);
2222
2223         /* The instance name contains the sb: lustre-client-aacfe000 */
2224         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2225         if (!ptr || !*(++ptr))
2226                 return -EINVAL;
2227         if (sscanf(ptr, "%lx", &x) != 1)
2228                 return -EINVAL;
2229         sb = (void *)x;
2230         /* This better be a real Lustre superblock! */
2231         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2232
2233         /* Note we have not called client_common_fill_super yet, so
2234            proc fns must be able to handle that! */
2235         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2236                                       lcfg, sb);
2237         if (rc > 0)
2238                 rc = 0;
2239         return rc;
2240 }
2241
2242 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2243 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2244                                        struct inode *i1, struct inode *i2,
2245                                        const char *name, int namelen,
2246                                        int mode, __u32 opc, void *data)
2247 {
2248         LASSERT(i1 != NULL);
2249
2250         if (namelen > ll_i2sbi(i1)->ll_namelen)
2251                 return ERR_PTR(-ENAMETOOLONG);
2252
2253         if (op_data == NULL)
2254                 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
2255
2256         if (op_data == NULL)
2257                 return ERR_PTR(-ENOMEM);
2258
2259         ll_i2gids(op_data->op_suppgids, i1, i2);
2260         op_data->op_fid1 = *ll_inode2fid(i1);
2261         op_data->op_capa1 = ll_mdscapa_get(i1);
2262
2263         if (i2) {
2264                 op_data->op_fid2 = *ll_inode2fid(i2);
2265                 op_data->op_capa2 = ll_mdscapa_get(i2);
2266         } else {
2267                 fid_zero(&op_data->op_fid2);
2268                 op_data->op_capa2 = NULL;
2269         }
2270
2271         op_data->op_name = name;
2272         op_data->op_namelen = namelen;
2273         op_data->op_mode = mode;
2274         op_data->op_mod_time = get_seconds();
2275         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2276         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2277         op_data->op_cap = cfs_curproc_cap_pack();
2278         op_data->op_bias = 0;
2279         op_data->op_cli_flags = 0;
2280         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2281              filename_is_volatile(name, namelen, NULL))
2282                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2283         op_data->op_opc = opc;
2284         op_data->op_mds = 0;
2285         op_data->op_data = data;
2286
2287         /* If the file is being opened after mknod() (normally due to NFS)
2288          * try to use the default stripe data from parent directory for
2289          * allocating OST objects.  Try to pass the parent FID to MDS. */
2290         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2291             !ll_i2info(i2)->lli_has_smd) {
2292                 struct ll_inode_info *lli = ll_i2info(i2);
2293
2294                 spin_lock(&lli->lli_lock);
2295                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2296                         op_data->op_fid1 = lli->lli_pfid;
2297                 spin_unlock(&lli->lli_lock);
2298                 /** We ignore parent's capability temporary. */
2299         }
2300
2301         /* When called by ll_setattr_raw, file is i1. */
2302         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2303                 op_data->op_bias |= MDS_DATA_MODIFIED;
2304
2305         return op_data;
2306 }
2307
2308 void ll_finish_md_op_data(struct md_op_data *op_data)
2309 {
2310         capa_put(op_data->op_capa1);
2311         capa_put(op_data->op_capa2);
2312         OBD_FREE_PTR(op_data);
2313 }
2314
2315 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2316 {
2317         struct ll_sb_info *sbi;
2318
2319         LASSERT((seq != NULL) && (dentry != NULL));
2320         sbi = ll_s2sbi(dentry->d_sb);
2321
2322         if (sbi->ll_flags & LL_SBI_NOLCK)
2323                 seq_puts(seq, ",nolock");
2324
2325         if (sbi->ll_flags & LL_SBI_FLOCK)
2326                 seq_puts(seq, ",flock");
2327
2328         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2329                 seq_puts(seq, ",localflock");
2330
2331         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2332                 seq_puts(seq, ",user_xattr");
2333
2334         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2335                 seq_puts(seq, ",lazystatfs");
2336
2337         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2338                 seq_puts(seq, ",user_fid2path");
2339
2340         return 0;
2341 }
2342
2343 /**
2344  * Get obd name by cmd, and copy out to user space
2345  */
2346 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2347 {
2348         struct ll_sb_info *sbi = ll_i2sbi(inode);
2349         struct obd_device *obd;
2350
2351         if (cmd == OBD_IOC_GETDTNAME)
2352                 obd = class_exp2obd(sbi->ll_dt_exp);
2353         else if (cmd == OBD_IOC_GETMDNAME)
2354                 obd = class_exp2obd(sbi->ll_md_exp);
2355         else
2356                 return -EINVAL;
2357
2358         if (!obd)
2359                 return -ENOENT;
2360
2361         if (copy_to_user((void *)arg, obd->obd_name,
2362                              strlen(obd->obd_name) + 1))
2363                 return -EFAULT;
2364
2365         return 0;
2366 }
2367
2368 /**
2369  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2370  * fsname will be returned in this buffer; otherwise, a static buffer will be
2371  * used to store the fsname and returned to caller.
2372  */
2373 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2374 {
2375         static char fsname_static[MTI_NAME_MAXLEN];
2376         struct lustre_sb_info *lsi = s2lsi(sb);
2377         char *ptr;
2378         int len;
2379
2380         if (buf == NULL) {
2381                 /* this means the caller wants to use static buffer
2382                  * and it doesn't care about race. Usually this is
2383                  * in error reporting path */
2384                 buf = fsname_static;
2385                 buflen = sizeof(fsname_static);
2386         }
2387
2388         len = strlen(lsi->lsi_lmd->lmd_profile);
2389         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2390         if (ptr && (strcmp(ptr, "-client") == 0))
2391                 len -= 7;
2392
2393         if (unlikely(len >= buflen))
2394                 len = buflen - 1;
2395         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2396         buf[len] = '\0';
2397
2398         return buf;
2399 }
2400
2401 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2402 {
2403         char *path = NULL;
2404
2405         struct path p;
2406
2407         p.dentry = dentry;
2408         p.mnt = current->fs->root.mnt;
2409         path_get(&p);
2410         path = d_path(&p, buf, bufsize);
2411         path_put(&p);
2412
2413         return path;
2414 }
2415
2416 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2417 {
2418         char *buf, *path = NULL;
2419         struct dentry *dentry = NULL;
2420         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2421
2422         /* this can be called inside spin lock so use GFP_ATOMIC. */
2423         buf = (char *)__get_free_page(GFP_ATOMIC);
2424         if (buf != NULL) {
2425                 dentry = d_find_alias(page->mapping->host);
2426                 if (dentry != NULL)
2427                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2428         }
2429
2430         CDEBUG(D_WARNING,
2431                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2432                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2433                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2434                PFID(&obj->cob_header.coh_lu.loh_fid),
2435                (path && !IS_ERR(path)) ? path : "", ioret);
2436
2437         if (dentry != NULL)
2438                 dput(dentry);
2439
2440         if (buf != NULL)
2441                 free_page((unsigned long)buf);
2442 }