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, 2015, 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 dentry *llite_root;
  61 struct kset *llite_kset;
  62
  63 #ifndef log2
  64 #define log2(n) ffz(~(n))
  65 #endif
  66
  67 static struct ll_sb_info *ll_init_sbi(struct super_block *sb)
  68 {
  69         struct ll_sb_info *sbi = NULL;
  70         unsigned long pages;
  71         unsigned long lru_page_max;
  72         struct sysinfo si;
  73         class_uuid_t uuid;
  74         int i;
  75
  76         sbi = kzalloc(sizeof(*sbi), GFP_NOFS);
  77         if (!sbi)
  78                 return NULL;
  79
  80         spin_lock_init(&sbi->ll_lock);
  81         mutex_init(&sbi->ll_lco.lco_lock);
  82         spin_lock_init(&sbi->ll_pp_extent_lock);
  83         spin_lock_init(&sbi->ll_process_lock);
  84         sbi->ll_rw_stats_on = 0;
  85
  86         si_meminfo(&si);
  87         pages = si.totalram - si.totalhigh;
  88         if (pages >> (20 - PAGE_SHIFT) < 512)
  89                 lru_page_max = pages / 2;
  90         else
  91                 lru_page_max = (pages / 4) * 3;
  92
  93         /* initialize lru data */
  94         atomic_set(&sbi->ll_cache.ccc_users, 0);
  95         sbi->ll_cache.ccc_lru_max = lru_page_max;
  96         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
  97         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
  98         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
  99
 100         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 101                                            SBI_DEFAULT_READAHEAD_MAX);
 102         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 103         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 104                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 105
 106         ll_generate_random_uuid(uuid);
 107         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 108         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 109
 110         sbi->ll_flags |= LL_SBI_VERBOSE;
 111         sbi->ll_flags |= LL_SBI_CHECKSUM;
 112
 113         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 114
 115         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 116                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 117                                pp_r_hist.oh_lock);
 118                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 119                                pp_w_hist.oh_lock);
 120         }
 121
 122         /* metadata statahead is enabled by default */
 123         sbi->ll_sa_max = LL_SA_RPC_DEF;
 124         atomic_set(&sbi->ll_sa_total, 0);
 125         atomic_set(&sbi->ll_sa_wrong, 0);
 126         atomic_set(&sbi->ll_agl_total, 0);
 127         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 128
 129         sbi->ll_sb = sb;
 130
 131         return sbi;
 132 }
 133
 134 static void ll_free_sbi(struct super_block *sb)
 135 {
 136         struct ll_sb_info *sbi = ll_s2sbi(sb);
 137
 138         kfree(sbi);
 139 }
 140
 141 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 142                                     struct vfsmount *mnt)
 143 {
 144         struct inode *root = NULL;
 145         struct ll_sb_info *sbi = ll_s2sbi(sb);
 146         struct obd_device *obd;
 147         struct obd_statfs *osfs = NULL;
 148         struct ptlrpc_request *request = NULL;
 149         struct obd_connect_data *data = NULL;
 150         struct obd_uuid *uuid;
 151         struct md_op_data *op_data;
 152         struct lustre_md lmd;
 153         u64 valid;
 154         int size, err, checksum;
 155
 156         obd = class_name2obd(md);
 157         if (!obd) {
 158                 CERROR("MD %s: not setup or attached\n", md);
 159                 return -EINVAL;
 160         }
 161
 162         data = kzalloc(sizeof(*data), GFP_NOFS);
 163         if (!data)
 164                 return -ENOMEM;
 165
 166         osfs = kzalloc(sizeof(*osfs), GFP_NOFS);
 167         if (!osfs) {
 168                 kfree(data);
 169                 return -ENOMEM;
 170         }
 171
 172         if (llite_root) {
 173                 err = ldebugfs_register_mountpoint(llite_root, sb, dt, md);
 174                 if (err < 0)
 175                         CERROR("could not register mount in <debugfs>/lustre/llite\n");
 176         }
 177
 178         /* indicate the features supported by this client */
 179         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 180                                   OBD_CONNECT_ATTRFID  |
 181                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 182                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 183                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 184                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 185                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 186                                   OBD_CONNECT_EINPROGRESS |
 187                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 188                                   OBD_CONNECT_LAYOUTLOCK |
 189                                   OBD_CONNECT_PINGLESS |
 190                                   OBD_CONNECT_MAX_EASIZE |
 191                                   OBD_CONNECT_FLOCK_DEAD |
 192                                   OBD_CONNECT_DISP_STRIPE;
 193
 194         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 195                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 196
 197         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 198                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 199 #ifdef CONFIG_FS_POSIX_ACL
 200         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 201 #endif
 202
 203         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 204                 /* flag mdc connection as lightweight, only used for test
 205                  * purpose, use with care
 206                  */
 207                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 208
 209         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 210         data->ocd_version = LUSTRE_VERSION_CODE;
 211
 212         if (sb->s_flags & MS_RDONLY)
 213                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 214         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 215                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 216
 217         if (sbi->ll_flags & LL_SBI_FLOCK)
 218                 sbi->ll_fop = &ll_file_operations_flock;
 219         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 220                 sbi->ll_fop = &ll_file_operations;
 221         else
 222                 sbi->ll_fop = &ll_file_operations_noflock;
 223
 224         /* real client */
 225         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 226         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 227                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 228
 229         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 230
 231         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid,
 232                           data, NULL);
 233         if (err == -EBUSY) {
 234                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing recovery, of which this client is not a part. Please wait for recovery to complete, abort, or time out.\n",
 235                                    md);
 236                 goto out;
 237         } else if (err) {
 238                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 239                 goto out;
 240         }
 241
 242         sbi->ll_md_exp->exp_connect_data = *data;
 243
 244         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 245                            LUSTRE_SEQ_METADATA);
 246         if (err) {
 247                 CERROR("%s: Can't init metadata layer FID infrastructure, rc = %d\n",
 248                        sbi->ll_md_exp->exp_obd->obd_name, err);
 249                 goto out_md;
 250         }
 251
 252         /* For mount, we only need fs info from MDT0, and also in DNE, it
 253          * can make sure the client can be mounted as long as MDT0 is
 254          * available
 255          */
 256         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 257                          cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 258                          OBD_STATFS_FOR_MDT0);
 259         if (err)
 260                 goto out_md_fid;
 261
 262         /* This needs to be after statfs to ensure connect has finished.
 263          * Note that "data" does NOT contain the valid connect reply.
 264          * If connecting to a 1.8 server there will be no LMV device, so
 265          * we can access the MDC export directly and exp_connect_flags will
 266          * be non-zero, but if accessing an upgraded 2.1 server it will
 267          * have the correct flags filled in.
 268          * XXX: fill in the LMV exp_connect_flags from MDC(s).
 269          */
 270         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 271         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 272             valid != CLIENT_CONNECT_MDT_REQD) {
 273                 char *buf;
 274
 275                 buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
 276                 if (!buf) {
 277                         err = -ENOMEM;
 278                         goto out_md_fid;
 279                 }
 280                 obd_connect_flags2str(buf, PAGE_SIZE,
 281                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 282                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support feature(s) needed for correct operation of this client (%s). Please upgrade server or downgrade client.\n",
 283                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 284                 kfree(buf);
 285                 err = -EPROTO;
 286                 goto out_md_fid;
 287         }
 288
 289         size = sizeof(*data);
 290         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 291                            KEY_CONN_DATA,  &size, data, NULL);
 292         if (err) {
 293                 CERROR("%s: Get connect data failed: rc = %d\n",
 294                        sbi->ll_md_exp->exp_obd->obd_name, err);
 295                 goto out_md_fid;
 296         }
 297
 298         LASSERT(osfs->os_bsize);
 299         sb->s_blocksize = osfs->os_bsize;
 300         sb->s_blocksize_bits = log2(osfs->os_bsize);
 301         sb->s_magic = LL_SUPER_MAGIC;
 302         sb->s_maxbytes = MAX_LFS_FILESIZE;
 303         sbi->ll_namelen = osfs->os_namelen;
 304
 305         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 306             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 307                 LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
 308                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 309         }
 310
 311         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 312                 sb->s_flags |= MS_POSIXACL;
 313                 sbi->ll_flags |= LL_SBI_ACL;
 314         } else {
 315                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 316                 sb->s_flags &= ~MS_POSIXACL;
 317                 sbi->ll_flags &= ~LL_SBI_ACL;
 318         }
 319
 320         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 321                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 322                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 323                         LCONSOLE_INFO("client is set as remote by default.\n");
 324                 }
 325         } else {
 326                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 327                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 328                         LCONSOLE_INFO("client claims to be remote, but server rejected, forced to be local.\n");
 329                 }
 330         }
 331
 332         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 333                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 334
 335         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 336                 sbi->ll_md_brw_size = data->ocd_brw_size;
 337         else
 338                 sbi->ll_md_brw_size = PAGE_SIZE;
 339
 340         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 341                 LCONSOLE_INFO("Layout lock feature supported.\n");
 342                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 343         }
 344
 345         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 346                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 347                         LCONSOLE_INFO(
 348                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 349                                 dt);
 350                 } else {
 351                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 352                         sbi->ll_xattr_cache_enabled = 1;
 353                 }
 354         }
 355
 356         obd = class_name2obd(dt);
 357         if (!obd) {
 358                 CERROR("DT %s: not setup or attached\n", dt);
 359                 err = -ENODEV;
 360                 goto out_md_fid;
 361         }
 362
 363         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 364                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 365                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 366                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 367                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 368                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 369                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 370                                   OBD_CONNECT_MAXBYTES |
 371                                   OBD_CONNECT_EINPROGRESS |
 372                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 373                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 374
 375         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 376                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 377
 378         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 379                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 380                  * disabled by default, because it can still be enabled on the
 381                  * fly via /sys. As a consequence, we still need to come to an
 382                  * agreement on the supported algorithms at connect time
 383                  */
 384                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 385
 386                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 387                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 388                 else
 389                         data->ocd_cksum_types = cksum_types_supported_client();
 390         }
 391
 392         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 393         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 394                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 395
 396         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d ocd_grant: %d\n",
 397                data->ocd_connect_flags,
 398                data->ocd_version, data->ocd_grant);
 399
 400         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 401         obd->obd_upcall.onu_upcall = cl_ocd_update;
 402
 403         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 404
 405         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 406                           NULL);
 407         if (err == -EBUSY) {
 408                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing recovery, of which this client is not a part.  Please wait for recovery to complete, abort, or time out.\n",
 409                                    dt);
 410                 goto out_md;
 411         } else if (err) {
 412                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 413                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 414                 goto out_md;
 415         }
 416
 417         sbi->ll_dt_exp->exp_connect_data = *data;
 418
 419         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 420                            LUSTRE_SEQ_METADATA);
 421         if (err) {
 422                 CERROR("%s: Can't init data layer FID infrastructure, rc = %d\n",
 423                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 424                 goto out_dt;
 425         }
 426
 427         mutex_lock(&sbi->ll_lco.lco_lock);
 428         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 429         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 430         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 431         mutex_unlock(&sbi->ll_lco.lco_lock);
 432
 433         fid_zero(&sbi->ll_root_fid);
 434         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid);
 435         if (err) {
 436                 CERROR("cannot mds_connect: rc = %d\n", err);
 437                 goto out_lock_cn_cb;
 438         }
 439         if (!fid_is_sane(&sbi->ll_root_fid)) {
 440                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 441                        sbi->ll_md_exp->exp_obd->obd_name,
 442                        PFID(&sbi->ll_root_fid));
 443                 err = -EINVAL;
 444                 goto out_lock_cn_cb;
 445         }
 446         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 447
 448         sb->s_op = &lustre_super_operations;
 449 #if THREAD_SIZE >= 8192 /*b=17630*/
 450         sb->s_export_op = &lustre_export_operations;
 451 #endif
 452
 453         /* make root inode
 454          * XXX: move this to after cbd setup?
 455          */
 456         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS;
 457         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 458                 valid |= OBD_MD_FLRMTPERM;
 459         else if (sbi->ll_flags & LL_SBI_ACL)
 460                 valid |= OBD_MD_FLACL;
 461
 462         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 463         if (!op_data) {
 464                 err = -ENOMEM;
 465                 goto out_lock_cn_cb;
 466         }
 467
 468         op_data->op_fid1 = sbi->ll_root_fid;
 469         op_data->op_mode = 0;
 470         op_data->op_valid = valid;
 471
 472         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 473         kfree(op_data);
 474         if (err) {
 475                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 476                        sbi->ll_md_exp->exp_obd->obd_name, err);
 477                 goto out_lock_cn_cb;
 478         }
 479
 480         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 481                                sbi->ll_md_exp, &lmd);
 482         if (err) {
 483                 CERROR("failed to understand root inode md: rc = %d\n", err);
 484                 ptlrpc_req_finished(request);
 485                 goto out_lock_cn_cb;
 486         }
 487
 488         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 489         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 490                                             sbi->ll_flags & LL_SBI_32BIT_API),
 491                        &lmd);
 492         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 493         ptlrpc_req_finished(request);
 494
 495         if (!(root)) {
 496                 if (lmd.lsm)
 497                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 498 #ifdef CONFIG_FS_POSIX_ACL
 499                 if (lmd.posix_acl) {
 500                         posix_acl_release(lmd.posix_acl);
 501                         lmd.posix_acl = NULL;
 502                 }
 503 #endif
 504                 err = -EBADF;
 505                 CERROR("lustre_lite: bad iget4 for root\n");
 506                 goto out_root;
 507         }
 508
 509         err = ll_close_thread_start(&sbi->ll_lcq);
 510         if (err) {
 511                 CERROR("cannot start close thread: rc %d\n", err);
 512                 goto out_root;
 513         }
 514
 515 #ifdef CONFIG_FS_POSIX_ACL
 516         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 517                 rct_init(&sbi->ll_rct);
 518                 et_init(&sbi->ll_et);
 519         }
 520 #endif
 521
 522         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 523         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 524                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 525                                  NULL);
 526         cl_sb_init(sb);
 527
 528         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 529                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 530                                  &sbi->ll_cache, NULL);
 531
 532         sb->s_root = d_make_root(root);
 533         if (!sb->s_root) {
 534                 CERROR("%s: can't make root dentry\n",
 535                        ll_get_fsname(sb, NULL, 0));
 536                 err = -ENOMEM;
 537                 goto out_lock_cn_cb;
 538         }
 539
 540         sbi->ll_sdev_orig = sb->s_dev;
 541
 542         /* We set sb->s_dev equal on all lustre clients in order to support
 543          * NFS export clustering.  NFSD requires that the FSID be the same
 544          * on all clients.
 545          */
 546         /* s_dev is also used in lt_compare() to compare two fs, but that is
 547          * only a node-local comparison.
 548          */
 549         uuid = obd_get_uuid(sbi->ll_md_exp);
 550         if (uuid) {
 551                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 552                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 553         }
 554
 555         kfree(data);
 556         kfree(osfs);
 557
 558         return err;
 559 out_root:
 560         iput(root);
 561 out_lock_cn_cb:
 562         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 563 out_dt:
 564         obd_disconnect(sbi->ll_dt_exp);
 565         sbi->ll_dt_exp = NULL;
 566         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 567         obd_zombie_barrier();
 568 out_md_fid:
 569         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 570 out_md:
 571         obd_disconnect(sbi->ll_md_exp);
 572         sbi->ll_md_exp = NULL;
 573 out:
 574         kfree(data);
 575         kfree(osfs);
 576         ldebugfs_unregister_mountpoint(sbi);
 577         return err;
 578 }
 579
 580 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 581 {
 582         int size, rc;
 583
 584         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 585         size = sizeof(int);
 586         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 587                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 588         if (rc)
 589                 CERROR("Get max mdsize error rc %d\n", rc);
 590
 591         return rc;
 592 }
 593
 594 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 595 {
 596         int size, rc;
 597
 598         size = sizeof(int);
 599         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 600                           KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 601         if (rc)
 602                 CERROR("Get default mdsize error rc %d\n", rc);
 603
 604         return rc;
 605 }
 606
 607 static void client_common_put_super(struct super_block *sb)
 608 {
 609         struct ll_sb_info *sbi = ll_s2sbi(sb);
 610
 611 #ifdef CONFIG_FS_POSIX_ACL
 612         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 613                 et_fini(&sbi->ll_et);
 614                 rct_fini(&sbi->ll_rct);
 615         }
 616 #endif
 617
 618         ll_close_thread_shutdown(sbi->ll_lcq);
 619
 620         cl_sb_fini(sb);
 621
 622         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 623         obd_disconnect(sbi->ll_dt_exp);
 624         sbi->ll_dt_exp = NULL;
 625         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 626          * see LU-2543.
 627          */
 628         obd_zombie_barrier();
 629
 630         ldebugfs_unregister_mountpoint(sbi);
 631
 632         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 633         obd_disconnect(sbi->ll_md_exp);
 634         sbi->ll_md_exp = NULL;
 635 }
 636
 637 void ll_kill_super(struct super_block *sb)
 638 {
 639         struct ll_sb_info *sbi;
 640
 641         /* not init sb ?*/
 642         if (!(sb->s_flags & MS_ACTIVE))
 643                 return;
 644
 645         sbi = ll_s2sbi(sb);
 646         /* we need to restore s_dev from changed for clustered NFS before
 647          * put_super because new kernels have cached s_dev and change sb->s_dev
 648          * in put_super not affected real removing devices
 649          */
 650         if (sbi) {
 651                 sb->s_dev = sbi->ll_sdev_orig;
 652                 sbi->ll_umounting = 1;
 653         }
 654 }
 655
 656 static inline int ll_set_opt(const char *opt, char *data, int fl)
 657 {
 658         if (strncmp(opt, data, strlen(opt)) != 0)
 659                 return 0;
 660         else
 661                 return fl;
 662 }
 663
 664 /* non-client-specific mount options are parsed in lmd_parse */
 665 static int ll_options(char *options, int *flags)
 666 {
 667         int tmp;
 668         char *s1 = options, *s2;
 669
 670         if (!options)
 671                 return 0;
 672
 673         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 674
 675         while (*s1) {
 676                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 677                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 678                 if (tmp) {
 679                         *flags |= tmp;
 680                         goto next;
 681                 }
 682                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 683                 if (tmp) {
 684                         *flags |= tmp;
 685                         goto next;
 686                 }
 687                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 688                 if (tmp) {
 689                         *flags |= tmp;
 690                         goto next;
 691                 }
 692                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 693                 if (tmp) {
 694                         *flags &= ~tmp;
 695                         goto next;
 696                 }
 697                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 698                 if (tmp) {
 699                         *flags |= tmp;
 700                         goto next;
 701                 }
 702                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 703                 if (tmp) {
 704                         *flags &= ~tmp;
 705                         goto next;
 706                 }
 707                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 708                 if (tmp) {
 709                         *flags |= tmp;
 710                         goto next;
 711                 }
 712                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 713                 if (tmp) {
 714                         *flags |= tmp;
 715                         goto next;
 716                 }
 717                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 718                 if (tmp) {
 719                         *flags &= ~tmp;
 720                         goto next;
 721                 }
 722
 723                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 724                 if (tmp) {
 725                         *flags |= tmp;
 726                         goto next;
 727                 }
 728                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 729                 if (tmp) {
 730                         *flags &= ~tmp;
 731                         goto next;
 732                 }
 733                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 734                 if (tmp) {
 735                         *flags |= tmp;
 736                         goto next;
 737                 }
 738                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 739                 if (tmp) {
 740                         *flags &= ~tmp;
 741                         goto next;
 742                 }
 743                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 744                 if (tmp) {
 745                         *flags |= tmp;
 746                         goto next;
 747                 }
 748                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 749                 if (tmp) {
 750                         *flags &= ~tmp;
 751                         goto next;
 752                 }
 753                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 754                 if (tmp) {
 755                         *flags |= tmp;
 756                         goto next;
 757                 }
 758                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 759                 if (tmp) {
 760                         *flags |= tmp;
 761                         goto next;
 762                 }
 763                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 764                 if (tmp) {
 765                         *flags |= tmp;
 766                         goto next;
 767                 }
 768                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 769                 if (tmp) {
 770                         *flags &= ~tmp;
 771                         goto next;
 772                 }
 773                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 774                                    s1);
 775                 return -EINVAL;
 776
 777 next:
 778                 /* Find next opt */
 779                 s2 = strchr(s1, ',');
 780                 if (!s2)
 781                         break;
 782                 s1 = s2 + 1;
 783         }
 784         return 0;
 785 }
 786
 787 void ll_lli_init(struct ll_inode_info *lli)
 788 {
 789         lli->lli_inode_magic = LLI_INODE_MAGIC;
 790         lli->lli_flags = 0;
 791         lli->lli_ioepoch = 0;
 792         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 793         spin_lock_init(&lli->lli_lock);
 794         lli->lli_posix_acl = NULL;
 795         lli->lli_remote_perms = NULL;
 796         mutex_init(&lli->lli_rmtperm_mutex);
 797         /* Do not set lli_fid, it has been initialized already. */
 798         fid_zero(&lli->lli_pfid);
 799         INIT_LIST_HEAD(&lli->lli_close_list);
 800         lli->lli_rmtperm_time = 0;
 801         lli->lli_pending_och = NULL;
 802         lli->lli_mds_read_och = NULL;
 803         lli->lli_mds_write_och = NULL;
 804         lli->lli_mds_exec_och = NULL;
 805         lli->lli_open_fd_read_count = 0;
 806         lli->lli_open_fd_write_count = 0;
 807         lli->lli_open_fd_exec_count = 0;
 808         mutex_init(&lli->lli_och_mutex);
 809         spin_lock_init(&lli->lli_agl_lock);
 810         lli->lli_has_smd = false;
 811         spin_lock_init(&lli->lli_layout_lock);
 812         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 813         lli->lli_clob = NULL;
 814
 815         init_rwsem(&lli->lli_xattrs_list_rwsem);
 816         mutex_init(&lli->lli_xattrs_enq_lock);
 817
 818         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 819         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 820                 mutex_init(&lli->lli_readdir_mutex);
 821                 lli->lli_opendir_key = NULL;
 822                 lli->lli_sai = NULL;
 823                 spin_lock_init(&lli->lli_sa_lock);
 824                 lli->lli_opendir_pid = 0;
 825         } else {
 826                 mutex_init(&lli->lli_size_mutex);
 827                 lli->lli_symlink_name = NULL;
 828                 init_rwsem(&lli->lli_trunc_sem);
 829                 mutex_init(&lli->lli_write_mutex);
 830                 init_rwsem(&lli->lli_glimpse_sem);
 831                 lli->lli_glimpse_time = 0;
 832                 INIT_LIST_HEAD(&lli->lli_agl_list);
 833                 lli->lli_agl_index = 0;
 834                 lli->lli_async_rc = 0;
 835         }
 836         mutex_init(&lli->lli_layout_mutex);
 837 }
 838
 839 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 840 {
 841         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 842
 843         bdi->name = "lustre";
 844         return bdi_register(bdi, NULL, "lustre-%d",
 845                             atomic_inc_return(&ll_bdi_num));
 846 }
 847
 848 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 849 {
 850         struct lustre_profile *lprof = NULL;
 851         struct lustre_sb_info *lsi = s2lsi(sb);
 852         struct ll_sb_info *sbi;
 853         char  *dt = NULL, *md = NULL;
 854         char  *profilenm = get_profile_name(sb);
 855         struct config_llog_instance *cfg;
 856         int    err;
 857
 858         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 859
 860         cfg = kzalloc(sizeof(*cfg), GFP_NOFS);
 861         if (!cfg)
 862                 return -ENOMEM;
 863
 864         try_module_get(THIS_MODULE);
 865
 866         /* client additional sb info */
 867         lsi->lsi_llsbi = sbi = ll_init_sbi(sb);
 868         if (!sbi) {
 869                 module_put(THIS_MODULE);
 870                 kfree(cfg);
 871                 return -ENOMEM;
 872         }
 873
 874         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 875         if (err)
 876                 goto out_free;
 877
 878         err = bdi_init(&lsi->lsi_bdi);
 879         if (err)
 880                 goto out_free;
 881         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 882         lsi->lsi_bdi.capabilities = 0;
 883         err = ll_bdi_register(&lsi->lsi_bdi);
 884         if (err)
 885                 goto out_free;
 886
 887         sb->s_bdi = &lsi->lsi_bdi;
 888         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 889         sb->s_d_op = &ll_d_ops;
 890
 891         /* Generate a string unique to this super, in case some joker tries
 892          * to mount the same fs at two mount points.
 893          * Use the address of the super itself.
 894          */
 895         cfg->cfg_instance = sb;
 896         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 897         cfg->cfg_callback = class_config_llog_handler;
 898         /* set up client obds */
 899         err = lustre_process_log(sb, profilenm, cfg);
 900         if (err < 0) {
 901                 CERROR("Unable to process log: %d\n", err);
 902                 goto out_free;
 903         }
 904
 905         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 906         lprof = class_get_profile(profilenm);
 907         if (!lprof) {
 908                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be read from the MGS.  Does that filesystem exist?\n",
 909                                    profilenm);
 910                 err = -EINVAL;
 911                 goto out_free;
 912         }
 913         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 914                lprof->lp_md, lprof->lp_dt);
 915
 916         dt = kasprintf(GFP_NOFS, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
 917         if (!dt) {
 918                 err = -ENOMEM;
 919                 goto out_free;
 920         }
 921
 922         md = kasprintf(GFP_NOFS, "%s-%p", lprof->lp_md, cfg->cfg_instance);
 923         if (!md) {
 924                 err = -ENOMEM;
 925                 goto out_free;
 926         }
 927
 928         /* connections, registrations, sb setup */
 929         err = client_common_fill_super(sb, md, dt, mnt);
 930
 931 out_free:
 932         kfree(md);
 933         kfree(dt);
 934         if (err)
 935                 ll_put_super(sb);
 936         else if (sbi->ll_flags & LL_SBI_VERBOSE)
 937                 LCONSOLE_WARN("Mounted %s\n", profilenm);
 938
 939         kfree(cfg);
 940         return err;
 941 } /* ll_fill_super */
 942
 943 void ll_put_super(struct super_block *sb)
 944 {
 945         struct config_llog_instance cfg, params_cfg;
 946         struct obd_device *obd;
 947         struct lustre_sb_info *lsi = s2lsi(sb);
 948         struct ll_sb_info *sbi = ll_s2sbi(sb);
 949         char *profilenm = get_profile_name(sb);
 950         int next, force = 1;
 951
 952         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
 953
 954         cfg.cfg_instance = sb;
 955         lustre_end_log(sb, profilenm, &cfg);
 956
 957         params_cfg.cfg_instance = sb;
 958         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
 959
 960         if (sbi->ll_md_exp) {
 961                 obd = class_exp2obd(sbi->ll_md_exp);
 962                 if (obd)
 963                         force = obd->obd_force;
 964         }
 965
 966         /* We need to set force before the lov_disconnect in
 967          * lustre_common_put_super, since l_d cleans up osc's as well.
 968          */
 969         if (force) {
 970                 next = 0;
 971                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
 972                                                      &next)) != NULL) {
 973                         obd->obd_force = force;
 974                 }
 975         }
 976
 977         if (sbi->ll_lcq) {
 978                 /* Only if client_common_fill_super succeeded */
 979                 client_common_put_super(sb);
 980         }
 981
 982         next = 0;
 983         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
 984                 class_manual_cleanup(obd);
 985
 986         if (sbi->ll_flags & LL_SBI_VERBOSE)
 987                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
 988
 989         if (profilenm)
 990                 class_del_profile(profilenm);
 991
 992         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
 993                 bdi_destroy(&lsi->lsi_bdi);
 994                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
 995         }
 996
 997         ll_free_sbi(sb);
 998         lsi->lsi_llsbi = NULL;
 999
1000         lustre_common_put_super(sb);
1001
1002         module_put(THIS_MODULE);
1003 } /* client_put_super */
1004
1005 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1006 {
1007         struct inode *inode = NULL;
1008
1009         /* NOTE: we depend on atomic igrab() -bzzz */
1010         lock_res_and_lock(lock);
1011         if (lock->l_resource->lr_lvb_inode) {
1012                 struct ll_inode_info *lli;
1013
1014                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1015                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1016                         inode = igrab(lock->l_resource->lr_lvb_inode);
1017                 } else {
1018                         inode = lock->l_resource->lr_lvb_inode;
1019                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1020                                          D_WARNING, lock, "lr_lvb_inode %p is bogus: magic %08x",
1021                                          lock->l_resource->lr_lvb_inode,
1022                                          lli->lli_inode_magic);
1023                         inode = NULL;
1024                 }
1025         }
1026         unlock_res_and_lock(lock);
1027         return inode;
1028 }
1029
1030 void ll_clear_inode(struct inode *inode)
1031 {
1032         struct ll_inode_info *lli = ll_i2info(inode);
1033         struct ll_sb_info *sbi = ll_i2sbi(inode);
1034
1035         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1036                inode->i_generation, inode);
1037
1038         if (S_ISDIR(inode->i_mode)) {
1039                 /* these should have been cleared in ll_file_release */
1040                 LASSERT(!lli->lli_opendir_key);
1041                 LASSERT(!lli->lli_sai);
1042                 LASSERT(lli->lli_opendir_pid == 0);
1043         }
1044
1045         spin_lock(&lli->lli_lock);
1046         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1047         spin_unlock(&lli->lli_lock);
1048         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1049
1050         LASSERT(!lli->lli_open_fd_write_count);
1051         LASSERT(!lli->lli_open_fd_read_count);
1052         LASSERT(!lli->lli_open_fd_exec_count);
1053
1054         if (lli->lli_mds_write_och)
1055                 ll_md_real_close(inode, FMODE_WRITE);
1056         if (lli->lli_mds_exec_och)
1057                 ll_md_real_close(inode, FMODE_EXEC);
1058         if (lli->lli_mds_read_och)
1059                 ll_md_real_close(inode, FMODE_READ);
1060
1061         if (S_ISLNK(inode->i_mode)) {
1062                 kfree(lli->lli_symlink_name);
1063                 lli->lli_symlink_name = NULL;
1064         }
1065
1066         ll_xattr_cache_destroy(inode);
1067
1068         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1069                 LASSERT(!lli->lli_posix_acl);
1070                 if (lli->lli_remote_perms) {
1071                         free_rmtperm_hash(lli->lli_remote_perms);
1072                         lli->lli_remote_perms = NULL;
1073                 }
1074         }
1075 #ifdef CONFIG_FS_POSIX_ACL
1076         else if (lli->lli_posix_acl) {
1077                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1078                 LASSERT(!lli->lli_remote_perms);
1079                 posix_acl_release(lli->lli_posix_acl);
1080                 lli->lli_posix_acl = NULL;
1081         }
1082 #endif
1083         lli->lli_inode_magic = LLI_INODE_DEAD;
1084
1085         if (!S_ISDIR(inode->i_mode))
1086                 LASSERT(list_empty(&lli->lli_agl_list));
1087
1088         /*
1089          * XXX This has to be done before lsm is freed below, because
1090          * cl_object still uses inode lsm.
1091          */
1092         cl_inode_fini(inode);
1093         lli->lli_has_smd = false;
1094 }
1095
1096 #define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
1097
1098 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1099                          struct md_open_data **mod)
1100 {
1101         struct lustre_md md;
1102         struct inode *inode = d_inode(dentry);
1103         struct ll_sb_info *sbi = ll_i2sbi(inode);
1104         struct ptlrpc_request *request = NULL;
1105         int rc, ia_valid;
1106
1107         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1108                                      LUSTRE_OPC_ANY, NULL);
1109         if (IS_ERR(op_data))
1110                 return PTR_ERR(op_data);
1111
1112         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1113                         &request, mod);
1114         if (rc) {
1115                 ptlrpc_req_finished(request);
1116                 if (rc == -ENOENT) {
1117                         clear_nlink(inode);
1118                         /* Unlinked special device node? Or just a race?
1119                          * Pretend we did everything.
1120                          */
1121                         if (!S_ISREG(inode->i_mode) &&
1122                             !S_ISDIR(inode->i_mode)) {
1123                                 ia_valid = op_data->op_attr.ia_valid;
1124                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1125                                 rc = simple_setattr(dentry, &op_data->op_attr);
1126                                 op_data->op_attr.ia_valid = ia_valid;
1127                         }
1128                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1129                         CERROR("md_setattr fails: rc = %d\n", rc);
1130                 }
1131                 return rc;
1132         }
1133
1134         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1135                               sbi->ll_md_exp, &md);
1136         if (rc) {
1137                 ptlrpc_req_finished(request);
1138                 return rc;
1139         }
1140
1141         ia_valid = op_data->op_attr.ia_valid;
1142         /* inode size will be in cl_setattr_ost, can't do it now since dirty
1143          * cache is not cleared yet.
1144          */
1145         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1146         rc = simple_setattr(dentry, &op_data->op_attr);
1147         op_data->op_attr.ia_valid = ia_valid;
1148
1149         /* Extract epoch data if obtained. */
1150         op_data->op_handle = md.body->handle;
1151         op_data->op_ioepoch = md.body->ioepoch;
1152
1153         ll_update_inode(inode, &md);
1154         ptlrpc_req_finished(request);
1155
1156         return rc;
1157 }
1158
1159 /* Close IO epoch and send Size-on-MDS attribute update. */
1160 static int ll_setattr_done_writing(struct inode *inode,
1161                                    struct md_op_data *op_data,
1162                                    struct md_open_data *mod)
1163 {
1164         struct ll_inode_info *lli = ll_i2info(inode);
1165         int rc = 0;
1166
1167         if (!S_ISREG(inode->i_mode))
1168                 return 0;
1169
1170         CDEBUG(D_INODE, "Epoch %llu closed on "DFID" for truncate\n",
1171                op_data->op_ioepoch, PFID(&lli->lli_fid));
1172
1173         op_data->op_flags = MF_EPOCH_CLOSE;
1174         ll_done_writing_attr(inode, op_data);
1175         ll_pack_inode2opdata(inode, op_data, NULL);
1176
1177         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1178         if (rc == -EAGAIN)
1179                 /* MDS has instructed us to obtain Size-on-MDS attribute
1180                  * from OSTs and send setattr to back to MDS.
1181                  */
1182                 rc = ll_som_update(inode, op_data);
1183         else if (rc)
1184                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1185                        inode->i_ino, rc);
1186         return rc;
1187 }
1188
1189 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1190  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1191  * keep these values until such a time that objects are allocated for it.
1192  * We do the MDS operations first, as it is checking permissions for us.
1193  * We don't to the MDS RPC if there is nothing that we want to store there,
1194  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1195  * going to do an RPC anyways.
1196  *
1197  * If we are doing a truncate, we will send the mtime and ctime updates
1198  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1199  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1200  * at the same time.
1201  *
1202  * In case of HSMimport, we only set attr on MDS.
1203  */
1204 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1205 {
1206         struct inode *inode = d_inode(dentry);
1207         struct ll_inode_info *lli = ll_i2info(inode);
1208         struct md_op_data *op_data = NULL;
1209         struct md_open_data *mod = NULL;
1210         bool file_is_released = false;
1211         int rc = 0, rc1 = 0;
1212
1213         CDEBUG(D_VFSTRACE,
1214                "%s: setattr inode %p/fid:" DFID
1215                " from %llu to %llu, valid %x, hsm_import %d\n",
1216                ll_get_fsname(inode->i_sb, NULL, 0), inode,
1217                PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1218                attr->ia_valid, hsm_import);
1219
1220         if (attr->ia_valid & ATTR_SIZE) {
1221                 /* Check new size against VFS/VM file size limit and rlimit */
1222                 rc = inode_newsize_ok(inode, attr->ia_size);
1223                 if (rc)
1224                         return rc;
1225
1226                 /* The maximum Lustre file size is variable, based on the
1227                  * OST maximum object size and number of stripes.  This
1228                  * needs another check in addition to the VFS check above.
1229                  */
1230                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1231                         CDEBUG(D_INODE, "file "DFID" too large %llu > %llu\n",
1232                                PFID(&lli->lli_fid), attr->ia_size,
1233                                ll_file_maxbytes(inode));
1234                         return -EFBIG;
1235                 }
1236
1237                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1238         }
1239
1240         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1241         if (attr->ia_valid & TIMES_SET_FLAGS) {
1242                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1243                     !capable(CFS_CAP_FOWNER))
1244                         return -EPERM;
1245         }
1246
1247         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1248         if (attr->ia_valid & ATTR_CTIME) {
1249                 attr->ia_ctime = CURRENT_TIME;
1250                 attr->ia_valid |= ATTR_CTIME_SET;
1251         }
1252         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1253             (attr->ia_valid & ATTR_ATIME)) {
1254                 attr->ia_atime = CURRENT_TIME;
1255                 attr->ia_valid |= ATTR_ATIME_SET;
1256         }
1257         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1258             (attr->ia_valid & ATTR_MTIME)) {
1259                 attr->ia_mtime = CURRENT_TIME;
1260                 attr->ia_valid |= ATTR_MTIME_SET;
1261         }
1262
1263         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1264                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1265                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1266                        (s64)ktime_get_real_seconds());
1267
1268         /* If we are changing file size, file content is modified, flag it. */
1269         if (attr->ia_valid & ATTR_SIZE) {
1270                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1271                 spin_lock(&lli->lli_lock);
1272                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1273                 spin_unlock(&lli->lli_lock);
1274         }
1275
1276         /* We always do an MDS RPC, even if we're only changing the size;
1277          * only the MDS knows whether truncate() should fail with -ETXTBUSY
1278          */
1279
1280         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1281         if (!op_data)
1282                 return -ENOMEM;
1283
1284         if (!S_ISDIR(inode->i_mode))
1285                 inode_unlock(inode);
1286
1287         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1288
1289         /* Open epoch for truncate. */
1290         if (exp_connect_som(ll_i2mdexp(inode)) &&
1291             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1292                 op_data->op_flags = MF_EPOCH_OPEN;
1293
1294         /* truncate on a released file must failed with -ENODATA,
1295          * so size must not be set on MDS for released file
1296          * but other attributes must be set
1297          */
1298         if (S_ISREG(inode->i_mode)) {
1299                 struct lov_stripe_md *lsm;
1300                 __u32 gen;
1301
1302                 ll_layout_refresh(inode, &gen);
1303                 lsm = ccc_inode_lsm_get(inode);
1304                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1305                         file_is_released = true;
1306                 ccc_inode_lsm_put(inode, lsm);
1307         }
1308
1309         /* if not in HSM import mode, clear size attr for released file
1310          * we clear the attribute send to MDT in op_data, not the original
1311          * received from caller in attr which is used later to
1312          * decide return code
1313          */
1314         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1315                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1316
1317         rc = ll_md_setattr(dentry, op_data, &mod);
1318         if (rc)
1319                 goto out;
1320
1321         /* truncate failed (only when non HSM import), others succeed */
1322         if (file_is_released) {
1323                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1324                         rc = -ENODATA;
1325                 else
1326                         rc = 0;
1327                 goto out;
1328         }
1329
1330         /* RPC to MDT is sent, cancel data modification flag */
1331         if (op_data->op_bias & MDS_DATA_MODIFIED) {
1332                 spin_lock(&lli->lli_lock);
1333                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1334                 spin_unlock(&lli->lli_lock);
1335         }
1336
1337         ll_ioepoch_open(lli, op_data->op_ioepoch);
1338         if (!S_ISREG(inode->i_mode)) {
1339                 rc = 0;
1340                 goto out;
1341         }
1342
1343         if (attr->ia_valid & (ATTR_SIZE |
1344                               ATTR_ATIME | ATTR_ATIME_SET |
1345                               ATTR_MTIME | ATTR_MTIME_SET)) {
1346                 /* For truncate and utimes sending attributes to OSTs, setting
1347                  * mtime/atime to the past will be performed under PW [0:EOF]
1348                  * extent lock (new_size:EOF for truncate).  It may seem
1349                  * excessive to send mtime/atime updates to OSTs when not
1350                  * setting times to past, but it is necessary due to possible
1351                  * time de-synchronization between MDT inode and OST objects
1352                  */
1353                 if (attr->ia_valid & ATTR_SIZE)
1354                         down_write(&lli->lli_trunc_sem);
1355                 rc = cl_setattr_ost(inode, attr);
1356                 if (attr->ia_valid & ATTR_SIZE)
1357                         up_write(&lli->lli_trunc_sem);
1358         }
1359 out:
1360         if (op_data->op_ioepoch) {
1361                 rc1 = ll_setattr_done_writing(inode, op_data, mod);
1362                 if (!rc)
1363                         rc = rc1;
1364         }
1365         ll_finish_md_op_data(op_data);
1366
1367         if (!S_ISDIR(inode->i_mode)) {
1368                 inode_lock(inode);
1369                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1370                         inode_dio_wait(inode);
1371         }
1372
1373         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1374                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1375
1376         return rc;
1377 }
1378
1379 int ll_setattr(struct dentry *de, struct iattr *attr)
1380 {
1381         int mode = d_inode(de)->i_mode;
1382
1383         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1384                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1385                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1386
1387         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1388                                (ATTR_SIZE|ATTR_MODE)) &&
1389             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1390              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1391               !(attr->ia_mode & S_ISGID))))
1392                 attr->ia_valid |= ATTR_FORCE;
1393
1394         if ((attr->ia_valid & ATTR_MODE) &&
1395             (mode & S_ISUID) &&
1396             !(attr->ia_mode & S_ISUID) &&
1397             !(attr->ia_valid & ATTR_KILL_SUID))
1398                 attr->ia_valid |= ATTR_KILL_SUID;
1399
1400         if ((attr->ia_valid & ATTR_MODE) &&
1401             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1402             !(attr->ia_mode & S_ISGID) &&
1403             !(attr->ia_valid & ATTR_KILL_SGID))
1404                 attr->ia_valid |= ATTR_KILL_SGID;
1405
1406         return ll_setattr_raw(de, attr, false);
1407 }
1408
1409 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1410                        __u64 max_age, __u32 flags)
1411 {
1412         struct ll_sb_info *sbi = ll_s2sbi(sb);
1413         struct obd_statfs obd_osfs;
1414         int rc;
1415
1416         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1417         if (rc) {
1418                 CERROR("md_statfs fails: rc = %d\n", rc);
1419                 return rc;
1420         }
1421
1422         osfs->os_type = sb->s_magic;
1423
1424         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1425                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,
1426                osfs->os_files);
1427
1428         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1429                 flags |= OBD_STATFS_NODELAY;
1430
1431         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1432         if (rc) {
1433                 CERROR("obd_statfs fails: rc = %d\n", rc);
1434                 return rc;
1435         }
1436
1437         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1438                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1439                obd_osfs.os_files);
1440
1441         osfs->os_bsize = obd_osfs.os_bsize;
1442         osfs->os_blocks = obd_osfs.os_blocks;
1443         osfs->os_bfree = obd_osfs.os_bfree;
1444         osfs->os_bavail = obd_osfs.os_bavail;
1445
1446         /* If we don't have as many objects free on the OST as inodes
1447          * on the MDS, we reduce the total number of inodes to
1448          * compensate, so that the "inodes in use" number is correct.
1449          */
1450         if (obd_osfs.os_ffree < osfs->os_ffree) {
1451                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1452                         obd_osfs.os_ffree;
1453                 osfs->os_ffree = obd_osfs.os_ffree;
1454         }
1455
1456         return rc;
1457 }
1458
1459 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1460 {
1461         struct super_block *sb = de->d_sb;
1462         struct obd_statfs osfs;
1463         int rc;
1464
1465         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1466         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1467
1468         /* Some amount of caching on the client is allowed */
1469         rc = ll_statfs_internal(sb, &osfs,
1470                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1471                                 0);
1472         if (rc)
1473                 return rc;
1474
1475         statfs_unpack(sfs, &osfs);
1476
1477         /* We need to downshift for all 32-bit kernels, because we can't
1478          * tell if the kernel is being called via sys_statfs64() or not.
1479          * Stop before overflowing f_bsize - in which case it is better
1480          * to just risk EOVERFLOW if caller is using old sys_statfs().
1481          */
1482         if (sizeof(long) < 8) {
1483                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1484                         sfs->f_bsize <<= 1;
1485
1486                         osfs.os_blocks >>= 1;
1487                         osfs.os_bfree >>= 1;
1488                         osfs.os_bavail >>= 1;
1489                 }
1490         }
1491
1492         sfs->f_blocks = osfs.os_blocks;
1493         sfs->f_bfree = osfs.os_bfree;
1494         sfs->f_bavail = osfs.os_bavail;
1495         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1496         return 0;
1497 }
1498
1499 void ll_inode_size_lock(struct inode *inode)
1500 {
1501         struct ll_inode_info *lli;
1502
1503         LASSERT(!S_ISDIR(inode->i_mode));
1504
1505         lli = ll_i2info(inode);
1506         mutex_lock(&lli->lli_size_mutex);
1507 }
1508
1509 void ll_inode_size_unlock(struct inode *inode)
1510 {
1511         struct ll_inode_info *lli;
1512
1513         lli = ll_i2info(inode);
1514         mutex_unlock(&lli->lli_size_mutex);
1515 }
1516
1517 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1518 {
1519         struct ll_inode_info *lli = ll_i2info(inode);
1520         struct mdt_body *body = md->body;
1521         struct lov_stripe_md *lsm = md->lsm;
1522         struct ll_sb_info *sbi = ll_i2sbi(inode);
1523
1524         LASSERT((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1525         if (lsm) {
1526                 if (!lli->lli_has_smd &&
1527                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1528                         cl_file_inode_init(inode, md);
1529
1530                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1531                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1532                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1533         }
1534
1535         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1536                 if (body->valid & OBD_MD_FLRMTPERM)
1537                         ll_update_remote_perm(inode, md->remote_perm);
1538         }
1539 #ifdef CONFIG_FS_POSIX_ACL
1540         else if (body->valid & OBD_MD_FLACL) {
1541                 spin_lock(&lli->lli_lock);
1542                 if (lli->lli_posix_acl)
1543                         posix_acl_release(lli->lli_posix_acl);
1544                 lli->lli_posix_acl = md->posix_acl;
1545                 spin_unlock(&lli->lli_lock);
1546         }
1547 #endif
1548         inode->i_ino = cl_fid_build_ino(&body->fid1,
1549                                         sbi->ll_flags & LL_SBI_32BIT_API);
1550         inode->i_generation = cl_fid_build_gen(&body->fid1);
1551
1552         if (body->valid & OBD_MD_FLATIME) {
1553                 if (body->atime > LTIME_S(inode->i_atime))
1554                         LTIME_S(inode->i_atime) = body->atime;
1555                 lli->lli_lvb.lvb_atime = body->atime;
1556         }
1557         if (body->valid & OBD_MD_FLMTIME) {
1558                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1559                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
1560                                inode->i_ino, LTIME_S(inode->i_mtime),
1561                                body->mtime);
1562                         LTIME_S(inode->i_mtime) = body->mtime;
1563                 }
1564                 lli->lli_lvb.lvb_mtime = body->mtime;
1565         }
1566         if (body->valid & OBD_MD_FLCTIME) {
1567                 if (body->ctime > LTIME_S(inode->i_ctime))
1568                         LTIME_S(inode->i_ctime) = body->ctime;
1569                 lli->lli_lvb.lvb_ctime = body->ctime;
1570         }
1571         if (body->valid & OBD_MD_FLMODE)
1572                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1573         if (body->valid & OBD_MD_FLTYPE)
1574                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1575         LASSERT(inode->i_mode != 0);
1576         if (S_ISREG(inode->i_mode))
1577                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1578                                        LL_MAX_BLKSIZE_BITS);
1579         else
1580                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1581         if (body->valid & OBD_MD_FLUID)
1582                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1583         if (body->valid & OBD_MD_FLGID)
1584                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1585         if (body->valid & OBD_MD_FLFLAGS)
1586                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1587         if (body->valid & OBD_MD_FLNLINK)
1588                 set_nlink(inode, body->nlink);
1589         if (body->valid & OBD_MD_FLRDEV)
1590                 inode->i_rdev = old_decode_dev(body->rdev);
1591
1592         if (body->valid & OBD_MD_FLID) {
1593                 /* FID shouldn't be changed! */
1594                 if (fid_is_sane(&lli->lli_fid)) {
1595                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1596                                  "Trying to change FID "DFID
1597                                  " to the "DFID", inode %lu/%u(%p)\n",
1598                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1599                                  inode->i_ino, inode->i_generation, inode);
1600                 } else
1601                         lli->lli_fid = body->fid1;
1602         }
1603
1604         LASSERT(fid_seq(&lli->lli_fid) != 0);
1605
1606         if (body->valid & OBD_MD_FLSIZE) {
1607                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1608                     S_ISREG(inode->i_mode)) {
1609                         struct lustre_handle lockh;
1610                         enum ldlm_mode mode;
1611
1612                         /* As it is possible a blocking ast has been processed
1613                          * by this time, we need to check there is an UPDATE
1614                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1615                          * it.
1616                          */
1617                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1618                                                &lockh, LDLM_FL_CBPENDING,
1619                                                LCK_CR | LCK_CW |
1620                                                LCK_PR | LCK_PW);
1621                         if (mode) {
1622                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1623                                                       LLIF_EPOCH_PENDING |
1624                                                       LLIF_SOM_DIRTY)) {
1625                                         CERROR("ino %lu flags %u still has size authority! do not trust the size got from MDS\n",
1626                                                inode->i_ino, lli->lli_flags);
1627                                 } else {
1628                                         /* Use old size assignment to avoid
1629                                          * deadlock bz14138 & bz14326
1630                                          */
1631                                         i_size_write(inode, body->size);
1632                                         spin_lock(&lli->lli_lock);
1633                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1634                                         spin_unlock(&lli->lli_lock);
1635                                 }
1636                                 ldlm_lock_decref(&lockh, mode);
1637                         }
1638                 } else {
1639                         /* Use old size assignment to avoid
1640                          * deadlock bz14138 & bz14326
1641                          */
1642                         i_size_write(inode, body->size);
1643
1644                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1645                                inode->i_ino, (unsigned long long)body->size);
1646                 }
1647
1648                 if (body->valid & OBD_MD_FLBLOCKS)
1649                         inode->i_blocks = body->blocks;
1650         }
1651
1652         if (body->valid & OBD_MD_TSTATE) {
1653                 if (body->t_state & MS_RESTORE)
1654                         lli->lli_flags |= LLIF_FILE_RESTORING;
1655         }
1656 }
1657
1658 void ll_read_inode2(struct inode *inode, void *opaque)
1659 {
1660         struct lustre_md *md = opaque;
1661         struct ll_inode_info *lli = ll_i2info(inode);
1662
1663         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1664                PFID(&lli->lli_fid), inode);
1665
1666         LASSERT(!lli->lli_has_smd);
1667
1668         /* Core attributes from the MDS first.  This is a new inode, and
1669          * the VFS doesn't zero times in the core inode so we have to do
1670          * it ourselves.  They will be overwritten by either MDS or OST
1671          * attributes - we just need to make sure they aren't newer.
1672          */
1673         LTIME_S(inode->i_mtime) = 0;
1674         LTIME_S(inode->i_atime) = 0;
1675         LTIME_S(inode->i_ctime) = 0;
1676         inode->i_rdev = 0;
1677         ll_update_inode(inode, md);
1678
1679         /* OIDEBUG(inode); */
1680
1681         if (S_ISREG(inode->i_mode)) {
1682                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1683
1684                 inode->i_op = &ll_file_inode_operations;
1685                 inode->i_fop = sbi->ll_fop;
1686                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1687         } else if (S_ISDIR(inode->i_mode)) {
1688                 inode->i_op = &ll_dir_inode_operations;
1689                 inode->i_fop = &ll_dir_operations;
1690         } else if (S_ISLNK(inode->i_mode)) {
1691                 inode->i_op = &ll_fast_symlink_inode_operations;
1692         } else {
1693                 inode->i_op = &ll_special_inode_operations;
1694
1695                 init_special_inode(inode, inode->i_mode,
1696                                    inode->i_rdev);
1697         }
1698 }
1699
1700 void ll_delete_inode(struct inode *inode)
1701 {
1702         struct cl_inode_info *lli = cl_i2info(inode);
1703
1704         if (S_ISREG(inode->i_mode) && lli->lli_clob)
1705                 /* discard all dirty pages before truncating them, required by
1706                  * osc_extent implementation at LU-1030.
1707                  */
1708                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1709                                    CL_FSYNC_DISCARD, 1);
1710
1711         truncate_inode_pages_final(&inode->i_data);
1712
1713         /* Workaround for LU-118 */
1714         if (inode->i_data.nrpages) {
1715                 spin_lock_irq(&inode->i_data.tree_lock);
1716                 spin_unlock_irq(&inode->i_data.tree_lock);
1717                 LASSERTF(inode->i_data.nrpages == 0,
1718                          "inode=%lu/%u(%p) nrpages=%lu, see http://jira.whamcloud.com/browse/LU-118\n",
1719                          inode->i_ino, inode->i_generation, inode,
1720                          inode->i_data.nrpages);
1721         }
1722         /* Workaround end */
1723
1724         ll_clear_inode(inode);
1725         clear_inode(inode);
1726 }
1727
1728 int ll_iocontrol(struct inode *inode, struct file *file,
1729                  unsigned int cmd, unsigned long arg)
1730 {
1731         struct ll_sb_info *sbi = ll_i2sbi(inode);
1732         struct ptlrpc_request *req = NULL;
1733         int rc, flags = 0;
1734
1735         switch (cmd) {
1736         case FSFILT_IOC_GETFLAGS: {
1737                 struct mdt_body *body;
1738                 struct md_op_data *op_data;
1739
1740                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1741                                              0, 0, LUSTRE_OPC_ANY,
1742                                              NULL);
1743                 if (IS_ERR(op_data))
1744                         return PTR_ERR(op_data);
1745
1746                 op_data->op_valid = OBD_MD_FLFLAGS;
1747                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1748                 ll_finish_md_op_data(op_data);
1749                 if (rc) {
1750                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1751                         return -abs(rc);
1752                 }
1753
1754                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1755
1756                 flags = body->flags;
1757
1758                 ptlrpc_req_finished(req);
1759
1760                 return put_user(flags, (int __user *)arg);
1761         }
1762         case FSFILT_IOC_SETFLAGS: {
1763                 struct lov_stripe_md *lsm;
1764                 struct obd_info oinfo = { };
1765                 struct md_op_data *op_data;
1766
1767                 if (get_user(flags, (int __user *)arg))
1768                         return -EFAULT;
1769
1770                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1771                                              LUSTRE_OPC_ANY, NULL);
1772                 if (IS_ERR(op_data))
1773                         return PTR_ERR(op_data);
1774
1775                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1776                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1777                 rc = md_setattr(sbi->ll_md_exp, op_data,
1778                                 NULL, 0, NULL, 0, &req, NULL);
1779                 ll_finish_md_op_data(op_data);
1780                 ptlrpc_req_finished(req);
1781                 if (rc)
1782                         return rc;
1783
1784                 inode->i_flags = ll_ext_to_inode_flags(flags);
1785
1786                 lsm = ccc_inode_lsm_get(inode);
1787                 if (!lsm_has_objects(lsm)) {
1788                         ccc_inode_lsm_put(inode, lsm);
1789                         return 0;
1790                 }
1791
1792                 oinfo.oi_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
1793                 if (!oinfo.oi_oa) {
1794                         ccc_inode_lsm_put(inode, lsm);
1795                         return -ENOMEM;
1796                 }
1797                 oinfo.oi_md = lsm;
1798                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1799                 oinfo.oi_oa->o_flags = flags;
1800                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1801                                        OBD_MD_FLGROUP;
1802                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1803                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1804                 kmem_cache_free(obdo_cachep, oinfo.oi_oa);
1805                 ccc_inode_lsm_put(inode, lsm);
1806
1807                 if (rc && rc != -EPERM && rc != -EACCES)
1808                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1809
1810                 return rc;
1811         }
1812         default:
1813                 return -ENOSYS;
1814         }
1815
1816         return 0;
1817 }
1818
1819 int ll_flush_ctx(struct inode *inode)
1820 {
1821         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1822
1823         CDEBUG(D_SEC, "flush context for user %d\n",
1824                from_kuid(&init_user_ns, current_uid()));
1825
1826         obd_set_info_async(NULL, sbi->ll_md_exp,
1827                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1828                            0, NULL, NULL);
1829         obd_set_info_async(NULL, sbi->ll_dt_exp,
1830                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1831                            0, NULL, NULL);
1832         return 0;
1833 }
1834
1835 /* umount -f client means force down, don't save state */
1836 void ll_umount_begin(struct super_block *sb)
1837 {
1838         struct ll_sb_info *sbi = ll_s2sbi(sb);
1839         struct obd_device *obd;
1840         struct obd_ioctl_data *ioc_data;
1841
1842         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1843                sb->s_count, atomic_read(&sb->s_active));
1844
1845         obd = class_exp2obd(sbi->ll_md_exp);
1846         if (!obd) {
1847                 CERROR("Invalid MDC connection handle %#llx\n",
1848                        sbi->ll_md_exp->exp_handle.h_cookie);
1849                 return;
1850         }
1851         obd->obd_force = 1;
1852
1853         obd = class_exp2obd(sbi->ll_dt_exp);
1854         if (!obd) {
1855                 CERROR("Invalid LOV connection handle %#llx\n",
1856                        sbi->ll_dt_exp->exp_handle.h_cookie);
1857                 return;
1858         }
1859         obd->obd_force = 1;
1860
1861         ioc_data = kzalloc(sizeof(*ioc_data), GFP_NOFS);
1862         if (ioc_data) {
1863                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
1864                               sizeof(*ioc_data), ioc_data, NULL);
1865
1866                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
1867                               sizeof(*ioc_data), ioc_data, NULL);
1868
1869                 kfree(ioc_data);
1870         }
1871
1872         /* Really, we'd like to wait until there are no requests outstanding,
1873          * and then continue.  For now, we just invalidate the requests,
1874          * schedule() and sleep one second if needed, and hope.
1875          */
1876         schedule();
1877 }
1878
1879 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
1880 {
1881         struct ll_sb_info *sbi = ll_s2sbi(sb);
1882         char *profilenm = get_profile_name(sb);
1883         int err;
1884         __u32 read_only;
1885
1886         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
1887                 read_only = *flags & MS_RDONLY;
1888                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
1889                                          sizeof(KEY_READ_ONLY),
1890                                          KEY_READ_ONLY, sizeof(read_only),
1891                                          &read_only, NULL);
1892                 if (err) {
1893                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
1894                                       profilenm, read_only ?
1895                                       "read-only" : "read-write", err);
1896                         return err;
1897                 }
1898
1899                 if (read_only)
1900                         sb->s_flags |= MS_RDONLY;
1901                 else
1902                         sb->s_flags &= ~MS_RDONLY;
1903
1904                 if (sbi->ll_flags & LL_SBI_VERBOSE)
1905                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
1906                                       read_only ?  "read-only" : "read-write");
1907         }
1908         return 0;
1909 }
1910
1911 /**
1912  * Cleanup the open handle that is cached on MDT-side.
1913  *
1914  * For open case, the client side open handling thread may hit error
1915  * after the MDT grant the open. Under such case, the client should
1916  * send close RPC to the MDT as cleanup; otherwise, the open handle
1917  * on the MDT will be leaked there until the client umount or evicted.
1918  *
1919  * In further, if someone unlinked the file, because the open handle
1920  * holds the reference on such file/object, then it will block the
1921  * subsequent threads that want to locate such object via FID.
1922  *
1923  * \param[in] sb        super block for this file-system
1924  * \param[in] open_req  pointer to the original open request
1925  */
1926 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
1927 {
1928         struct mdt_body                 *body;
1929         struct md_op_data               *op_data;
1930         struct ptlrpc_request           *close_req = NULL;
1931         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
1932
1933         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
1934         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1935         if (!op_data)
1936                 return;
1937
1938         op_data->op_fid1 = body->fid1;
1939         op_data->op_ioepoch = body->ioepoch;
1940         op_data->op_handle = body->handle;
1941         op_data->op_mod_time = get_seconds();
1942         md_close(exp, op_data, NULL, &close_req);
1943         ptlrpc_req_finished(close_req);
1944         ll_finish_md_op_data(op_data);
1945 }
1946
1947 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
1948                   struct super_block *sb, struct lookup_intent *it)
1949 {
1950         struct ll_sb_info *sbi = NULL;
1951         struct lustre_md md = { NULL };
1952         int rc;
1953
1954         LASSERT(*inode || sb);
1955         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
1956         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
1957                               sbi->ll_md_exp, &md);
1958         if (rc)
1959                 goto cleanup;
1960
1961         if (*inode) {
1962                 ll_update_inode(*inode, &md);
1963         } else {
1964                 LASSERT(sb);
1965
1966                 /*
1967                  * At this point server returns to client's same fid as client
1968                  * generated for creating. So using ->fid1 is okay here.
1969                  */
1970                 LASSERT(fid_is_sane(&md.body->fid1));
1971
1972                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
1973                                              sbi->ll_flags & LL_SBI_32BIT_API),
1974                                  &md);
1975                 if (!*inode) {
1976 #ifdef CONFIG_FS_POSIX_ACL
1977                         if (md.posix_acl) {
1978                                 posix_acl_release(md.posix_acl);
1979                                 md.posix_acl = NULL;
1980                         }
1981 #endif
1982                         rc = -ENOMEM;
1983                         CERROR("new_inode -fatal: rc %d\n", rc);
1984                         goto out;
1985                 }
1986         }
1987
1988         /* Handling piggyback layout lock.
1989          * Layout lock can be piggybacked by getattr and open request.
1990          * The lsm can be applied to inode only if it comes with a layout lock
1991          * otherwise correct layout may be overwritten, for example:
1992          * 1. proc1: mdt returns a lsm but not granting layout
1993          * 2. layout was changed by another client
1994          * 3. proc2: refresh layout and layout lock granted
1995          * 4. proc1: to apply a stale layout
1996          */
1997         if (it && it->d.lustre.it_lock_mode != 0) {
1998                 struct lustre_handle lockh;
1999                 struct ldlm_lock *lock;
2000
2001                 lockh.cookie = it->d.lustre.it_lock_handle;
2002                 lock = ldlm_handle2lock(&lockh);
2003                 LASSERT(lock);
2004                 if (ldlm_has_layout(lock)) {
2005                         struct cl_object_conf conf;
2006
2007                         memset(&conf, 0, sizeof(conf));
2008                         conf.coc_opc = OBJECT_CONF_SET;
2009                         conf.coc_inode = *inode;
2010                         conf.coc_lock = lock;
2011                         conf.u.coc_md = &md;
2012                         (void)ll_layout_conf(*inode, &conf);
2013                 }
2014                 LDLM_LOCK_PUT(lock);
2015         }
2016
2017 out:
2018         if (md.lsm)
2019                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2020         md_free_lustre_md(sbi->ll_md_exp, &md);
2021
2022 cleanup:
2023         if (rc != 0 && it && it->it_op & IT_OPEN)
2024                 ll_open_cleanup(sb ? sb : (*inode)->i_sb, req);
2025
2026         return rc;
2027 }
2028
2029 int ll_obd_statfs(struct inode *inode, void __user *arg)
2030 {
2031         struct ll_sb_info *sbi = NULL;
2032         struct obd_export *exp;
2033         char *buf = NULL;
2034         struct obd_ioctl_data *data = NULL;
2035         __u32 type;
2036         int len = 0, rc;
2037
2038         if (!inode) {
2039                 rc = -EINVAL;
2040                 goto out_statfs;
2041         }
2042
2043         sbi = ll_i2sbi(inode);
2044         if (!sbi) {
2045                 rc = -EINVAL;
2046                 goto out_statfs;
2047         }
2048
2049         rc = obd_ioctl_getdata(&buf, &len, arg);
2050         if (rc)
2051                 goto out_statfs;
2052
2053         data = (void *)buf;
2054         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2055             !data->ioc_pbuf1 || !data->ioc_pbuf2) {
2056                 rc = -EINVAL;
2057                 goto out_statfs;
2058         }
2059
2060         if (data->ioc_inllen1 != sizeof(__u32) ||
2061             data->ioc_inllen2 != sizeof(__u32) ||
2062             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2063             data->ioc_plen2 != sizeof(struct obd_uuid)) {
2064                 rc = -EINVAL;
2065                 goto out_statfs;
2066         }
2067
2068         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2069         if (type & LL_STATFS_LMV)
2070                 exp = sbi->ll_md_exp;
2071         else if (type & LL_STATFS_LOV)
2072                 exp = sbi->ll_dt_exp;
2073         else {
2074                 rc = -ENODEV;
2075                 goto out_statfs;
2076         }
2077
2078         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2079         if (rc)
2080                 goto out_statfs;
2081 out_statfs:
2082         if (buf)
2083                 obd_ioctl_freedata(buf, len);
2084         return rc;
2085 }
2086
2087 int ll_process_config(struct lustre_cfg *lcfg)
2088 {
2089         char *ptr;
2090         void *sb;
2091         struct lprocfs_static_vars lvars;
2092         unsigned long x;
2093         int rc = 0;
2094
2095         lprocfs_llite_init_vars(&lvars);
2096
2097         /* The instance name contains the sb: lustre-client-aacfe000 */
2098         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2099         if (!ptr || !*(++ptr))
2100                 return -EINVAL;
2101         rc = kstrtoul(ptr, 16, &x);
2102         if (rc != 0)
2103                 return -EINVAL;
2104         sb = (void *)x;
2105         /* This better be a real Lustre superblock! */
2106         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2107
2108         /* Note we have not called client_common_fill_super yet, so
2109          * proc fns must be able to handle that!
2110          */
2111         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2112                                       lcfg, sb);
2113         if (rc > 0)
2114                 rc = 0;
2115         return rc;
2116 }
2117
2118 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2119 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2120                                       struct inode *i1, struct inode *i2,
2121                                       const char *name, int namelen,
2122                                       int mode, __u32 opc, void *data)
2123 {
2124         if (namelen > ll_i2sbi(i1)->ll_namelen)
2125                 return ERR_PTR(-ENAMETOOLONG);
2126
2127         if (!op_data)
2128                 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
2129
2130         if (!op_data)
2131                 return ERR_PTR(-ENOMEM);
2132
2133         ll_i2gids(op_data->op_suppgids, i1, i2);
2134         op_data->op_fid1 = *ll_inode2fid(i1);
2135
2136         if (i2)
2137                 op_data->op_fid2 = *ll_inode2fid(i2);
2138         else
2139                 fid_zero(&op_data->op_fid2);
2140
2141         op_data->op_name = name;
2142         op_data->op_namelen = namelen;
2143         op_data->op_mode = mode;
2144         op_data->op_mod_time = ktime_get_real_seconds();
2145         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2146         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2147         op_data->op_cap = cfs_curproc_cap_pack();
2148         op_data->op_bias = 0;
2149         op_data->op_cli_flags = 0;
2150         if ((opc == LUSTRE_OPC_CREATE) && name &&
2151             filename_is_volatile(name, namelen, NULL))
2152                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2153         op_data->op_opc = opc;
2154         op_data->op_mds = 0;
2155         op_data->op_data = data;
2156
2157         /* If the file is being opened after mknod() (normally due to NFS)
2158          * try to use the default stripe data from parent directory for
2159          * allocating OST objects.  Try to pass the parent FID to MDS.
2160          */
2161         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2162             !ll_i2info(i2)->lli_has_smd) {
2163                 struct ll_inode_info *lli = ll_i2info(i2);
2164
2165                 spin_lock(&lli->lli_lock);
2166                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2167                         op_data->op_fid1 = lli->lli_pfid;
2168                 spin_unlock(&lli->lli_lock);
2169         }
2170
2171         /* When called by ll_setattr_raw, file is i1. */
2172         if (ll_i2info(i1)->lli_flags & LLIF_DATA_MODIFIED)
2173                 op_data->op_bias |= MDS_DATA_MODIFIED;
2174
2175         return op_data;
2176 }
2177
2178 void ll_finish_md_op_data(struct md_op_data *op_data)
2179 {
2180         kfree(op_data);
2181 }
2182
2183 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2184 {
2185         struct ll_sb_info *sbi;
2186
2187         LASSERT(seq && dentry);
2188         sbi = ll_s2sbi(dentry->d_sb);
2189
2190         if (sbi->ll_flags & LL_SBI_NOLCK)
2191                 seq_puts(seq, ",nolock");
2192
2193         if (sbi->ll_flags & LL_SBI_FLOCK)
2194                 seq_puts(seq, ",flock");
2195
2196         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2197                 seq_puts(seq, ",localflock");
2198
2199         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2200                 seq_puts(seq, ",user_xattr");
2201
2202         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2203                 seq_puts(seq, ",lazystatfs");
2204
2205         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2206                 seq_puts(seq, ",user_fid2path");
2207
2208         return 0;
2209 }
2210
2211 /**
2212  * Get obd name by cmd, and copy out to user space
2213  */
2214 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2215 {
2216         struct ll_sb_info *sbi = ll_i2sbi(inode);
2217         struct obd_device *obd;
2218
2219         if (cmd == OBD_IOC_GETDTNAME)
2220                 obd = class_exp2obd(sbi->ll_dt_exp);
2221         else if (cmd == OBD_IOC_GETMDNAME)
2222                 obd = class_exp2obd(sbi->ll_md_exp);
2223         else
2224                 return -EINVAL;
2225
2226         if (!obd)
2227                 return -ENOENT;
2228
2229         if (copy_to_user((void __user *)arg, obd->obd_name,
2230                          strlen(obd->obd_name) + 1))
2231                 return -EFAULT;
2232
2233         return 0;
2234 }
2235
2236 /**
2237  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2238  * fsname will be returned in this buffer; otherwise, a static buffer will be
2239  * used to store the fsname and returned to caller.
2240  */
2241 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2242 {
2243         static char fsname_static[MTI_NAME_MAXLEN];
2244         struct lustre_sb_info *lsi = s2lsi(sb);
2245         char *ptr;
2246         int len;
2247
2248         if (!buf) {
2249                 /* this means the caller wants to use static buffer
2250                  * and it doesn't care about race. Usually this is
2251                  * in error reporting path
2252                  */
2253                 buf = fsname_static;
2254                 buflen = sizeof(fsname_static);
2255         }
2256
2257         len = strlen(lsi->lsi_lmd->lmd_profile);
2258         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2259         if (ptr && (strcmp(ptr, "-client") == 0))
2260                 len -= 7;
2261
2262         if (unlikely(len >= buflen))
2263                 len = buflen - 1;
2264         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2265         buf[len] = '\0';
2266
2267         return buf;
2268 }
2269
2270 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2271 {
2272         char *buf, *path = NULL;
2273         struct dentry *dentry = NULL;
2274         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2275
2276         /* this can be called inside spin lock so use GFP_ATOMIC. */
2277         buf = (char *)__get_free_page(GFP_ATOMIC);
2278         if (buf) {
2279                 dentry = d_find_alias(page->mapping->host);
2280                 if (dentry)
2281                         path = dentry_path_raw(dentry, buf, PAGE_SIZE);
2282         }
2283
2284         CDEBUG(D_WARNING,
2285                "%s: dirty page discard: %s/fid: " DFID "/%s may get corrupted (rc %d)\n",
2286                ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2287                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2288                PFID(&obj->cob_header.coh_lu.loh_fid),
2289                (path && !IS_ERR(path)) ? path : "", ioret);
2290
2291         if (dentry)
2292                 dput(dentry);
2293
2294         if (buf)
2295                 free_page((unsigned long)buf);
2296 }