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

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/mm.h>
  47
  48 #include "../include/lustre_lite.h"
  49 #include "../include/lustre_ha.h"
  50 #include "../include/lustre_dlm.h"
  51 #include "../include/lprocfs_status.h"
  52 #include "../include/lustre_disk.h"
  53 #include "../include/lustre_param.h"
  54 #include "../include/lustre_log.h"
  55 #include "../include/cl_object.h"
  56 #include "../include/obd_cksum.h"
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60 struct 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_CACHE_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         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 106         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 107
 108         ll_generate_random_uuid(uuid);
 109         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 110         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 111
 112         sbi->ll_flags |= LL_SBI_VERBOSE;
 113         sbi->ll_flags |= LL_SBI_CHECKSUM;
 114
 115         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 116
 117         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 118                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 119                                pp_r_hist.oh_lock);
 120                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 121                                pp_w_hist.oh_lock);
 122         }
 123
 124         /* metadata statahead is enabled by default */
 125         sbi->ll_sa_max = LL_SA_RPC_DEF;
 126         atomic_set(&sbi->ll_sa_total, 0);
 127         atomic_set(&sbi->ll_sa_wrong, 0);
 128         atomic_set(&sbi->ll_agl_total, 0);
 129         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 130
 131         sbi->ll_sb = sb;
 132
 133         return sbi;
 134 }
 135
 136 static void ll_free_sbi(struct super_block *sb)
 137 {
 138         struct ll_sb_info *sbi = ll_s2sbi(sb);
 139
 140         kfree(sbi);
 141 }
 142
 143 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 144                                     struct vfsmount *mnt)
 145 {
 146         struct inode *root = NULL;
 147         struct ll_sb_info *sbi = ll_s2sbi(sb);
 148         struct obd_device *obd;
 149         struct obd_statfs *osfs = NULL;
 150         struct ptlrpc_request *request = NULL;
 151         struct obd_connect_data *data = NULL;
 152         struct obd_uuid *uuid;
 153         struct md_op_data *op_data;
 154         struct lustre_md lmd;
 155         u64 valid;
 156         int size, err, checksum;
 157
 158         obd = class_name2obd(md);
 159         if (!obd) {
 160                 CERROR("MD %s: not setup or attached\n", md);
 161                 return -EINVAL;
 162         }
 163
 164         data = kzalloc(sizeof(*data), GFP_NOFS);
 165         if (!data)
 166                 return -ENOMEM;
 167
 168         osfs = kzalloc(sizeof(*osfs), GFP_NOFS);
 169         if (!osfs) {
 170                 kfree(data);
 171                 return -ENOMEM;
 172         }
 173
 174         if (llite_root != NULL) {
 175                 err = ldebugfs_register_mountpoint(llite_root, sb, dt, md);
 176                 if (err < 0)
 177                         CERROR("could not register mount in <debugfs>/lustre/llite\n");
 178         }
 179
 180         /* indicate the features supported by this client */
 181         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 182                                   OBD_CONNECT_ATTRFID  |
 183                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 184                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 185                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 186                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 187                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 188                                   OBD_CONNECT_EINPROGRESS |
 189                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 190                                   OBD_CONNECT_LAYOUTLOCK |
 191                                   OBD_CONNECT_PINGLESS |
 192                                   OBD_CONNECT_MAX_EASIZE |
 193                                   OBD_CONNECT_FLOCK_DEAD |
 194                                   OBD_CONNECT_DISP_STRIPE;
 195
 196         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 197                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 198
 199         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 200                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 201 #ifdef CONFIG_FS_POSIX_ACL
 202         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 203 #endif
 204
 205         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 206                 /* flag mdc connection as lightweight, only used for test
 207                  * purpose, use with care */
 208                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 209
 210         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 211         data->ocd_version = LUSTRE_VERSION_CODE;
 212
 213         if (sb->s_flags & MS_RDONLY)
 214                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 215         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 216                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 217
 218         if (sbi->ll_flags & LL_SBI_FLOCK)
 219                 sbi->ll_fop = &ll_file_operations_flock;
 220         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 221                 sbi->ll_fop = &ll_file_operations;
 222         else
 223                 sbi->ll_fop = &ll_file_operations_noflock;
 224
 225         /* real client */
 226         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 227         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 228                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 229
 230         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 231
 232         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid,
 233                           data, NULL);
 234         if (err == -EBUSY) {
 235                 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",
 236                                    md);
 237                 goto out;
 238         } else if (err) {
 239                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 240                 goto out;
 241         }
 242
 243         sbi->ll_md_exp->exp_connect_data = *data;
 244
 245         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 246                            LUSTRE_SEQ_METADATA);
 247         if (err) {
 248                 CERROR("%s: Can't init metadata layer FID infrastructure, rc = %d\n",
 249                        sbi->ll_md_exp->exp_obd->obd_name, err);
 250                 goto out_md;
 251         }
 252
 253         /* For mount, we only need fs info from MDT0, and also in DNE, it
 254          * can make sure the client can be mounted as long as MDT0 is
 255          * available */
 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         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 270         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 271             valid != CLIENT_CONNECT_MDT_REQD) {
 272                 char *buf;
 273
 274                 buf = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
 275                 if (!buf) {
 276                         err = -ENOMEM;
 277                         goto out_md_fid;
 278                 }
 279                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 280                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 281                 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",
 282                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 283                 kfree(buf);
 284                 err = -EPROTO;
 285                 goto out_md_fid;
 286         }
 287
 288         size = sizeof(*data);
 289         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 290                            KEY_CONN_DATA,  &size, data, NULL);
 291         if (err) {
 292                 CERROR("%s: Get connect data failed: rc = %d\n",
 293                        sbi->ll_md_exp->exp_obd->obd_name, err);
 294                 goto out_md_fid;
 295         }
 296
 297         LASSERT(osfs->os_bsize);
 298         sb->s_blocksize = osfs->os_bsize;
 299         sb->s_blocksize_bits = log2(osfs->os_bsize);
 300         sb->s_magic = LL_SUPER_MAGIC;
 301         sb->s_maxbytes = MAX_LFS_FILESIZE;
 302         sbi->ll_namelen = osfs->os_namelen;
 303
 304         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 305             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 306                 LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
 307                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 308         }
 309
 310         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 311 #ifdef MS_POSIXACL
 312                 sb->s_flags |= MS_POSIXACL;
 313 #endif
 314                 sbi->ll_flags |= LL_SBI_ACL;
 315         } else {
 316                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 317 #ifdef MS_POSIXACL
 318                 sb->s_flags &= ~MS_POSIXACL;
 319 #endif
 320                 sbi->ll_flags &= ~LL_SBI_ACL;
 321         }
 322
 323         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 324                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 325                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 326                         LCONSOLE_INFO("client is set as remote by default.\n");
 327                 }
 328         } else {
 329                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 330                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 331                         LCONSOLE_INFO("client claims to be remote, but server rejected, forced to be local.\n");
 332                 }
 333         }
 334
 335         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 336                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 337
 338         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 339                 sbi->ll_md_brw_size = data->ocd_brw_size;
 340         else
 341                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 342
 343         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 344                 LCONSOLE_INFO("Layout lock feature supported.\n");
 345                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 346         }
 347
 348         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 349                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 350                         LCONSOLE_INFO(
 351                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 352                                 dt);
 353                 } else {
 354                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 355                         sbi->ll_xattr_cache_enabled = 1;
 356                 }
 357         }
 358
 359         obd = class_name2obd(dt);
 360         if (!obd) {
 361                 CERROR("DT %s: not setup or attached\n", dt);
 362                 err = -ENODEV;
 363                 goto out_md_fid;
 364         }
 365
 366         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 367                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 368                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 369                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 370                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 371                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 372                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 373                                   OBD_CONNECT_MAXBYTES |
 374                                   OBD_CONNECT_EINPROGRESS |
 375                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 376                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 377
 378         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 379                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 380
 381         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 382                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 383                  * disabled by default, because it can still be enabled on the
 384                  * fly via /sys. As a consequence, we still need to come to an
 385                  * agreement on the supported algorithms at connect time */
 386                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 387
 388                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 389                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 390                 else
 391                         data->ocd_cksum_types = cksum_types_supported_client();
 392         }
 393
 394         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 395         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 396                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 397
 398         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d ocd_grant: %d\n",
 399                data->ocd_connect_flags,
 400                data->ocd_version, data->ocd_grant);
 401
 402         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 403         obd->obd_upcall.onu_upcall = cl_ocd_update;
 404
 405         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 406
 407         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 408                           NULL);
 409         if (err == -EBUSY) {
 410                 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",
 411                                    dt);
 412                 goto out_md;
 413         } else if (err) {
 414                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 415                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 416                 goto out_md;
 417         }
 418
 419         sbi->ll_dt_exp->exp_connect_data = *data;
 420
 421         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 422                            LUSTRE_SEQ_METADATA);
 423         if (err) {
 424                 CERROR("%s: Can't init data layer FID infrastructure, rc = %d\n",
 425                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 426                 goto out_dt;
 427         }
 428
 429         mutex_lock(&sbi->ll_lco.lco_lock);
 430         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 431         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 432         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 433         mutex_unlock(&sbi->ll_lco.lco_lock);
 434
 435         fid_zero(&sbi->ll_root_fid);
 436         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid);
 437         if (err) {
 438                 CERROR("cannot mds_connect: rc = %d\n", err);
 439                 goto out_lock_cn_cb;
 440         }
 441         if (!fid_is_sane(&sbi->ll_root_fid)) {
 442                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 443                        sbi->ll_md_exp->exp_obd->obd_name,
 444                        PFID(&sbi->ll_root_fid));
 445                 err = -EINVAL;
 446                 goto out_lock_cn_cb;
 447         }
 448         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 449
 450         sb->s_op = &lustre_super_operations;
 451 #if THREAD_SIZE >= 8192 /*b=17630*/
 452         sb->s_export_op = &lustre_export_operations;
 453 #endif
 454
 455         /* make root inode
 456          * XXX: move this to after cbd setup? */
 457         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS;
 458         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 459                 valid |= OBD_MD_FLRMTPERM;
 460         else if (sbi->ll_flags & LL_SBI_ACL)
 461                 valid |= OBD_MD_FLACL;
 462
 463         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 464         if (!op_data) {
 465                 err = -ENOMEM;
 466                 goto out_lock_cn_cb;
 467         }
 468
 469         op_data->op_fid1 = sbi->ll_root_fid;
 470         op_data->op_mode = 0;
 471         op_data->op_valid = valid;
 472
 473         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 474         kfree(op_data);
 475         if (err) {
 476                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 477                        sbi->ll_md_exp->exp_obd->obd_name, err);
 478                 goto out_lock_cn_cb;
 479         }
 480
 481         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 482                                sbi->ll_md_exp, &lmd);
 483         if (err) {
 484                 CERROR("failed to understand root inode md: rc = %d\n", err);
 485                 ptlrpc_req_finished(request);
 486                 goto out_lock_cn_cb;
 487         }
 488
 489         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 490         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 491                                             sbi->ll_flags & LL_SBI_32BIT_API),
 492                        &lmd);
 493         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 494         ptlrpc_req_finished(request);
 495
 496         if (root == NULL || IS_ERR(root)) {
 497                 if (lmd.lsm)
 498                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 499 #ifdef CONFIG_FS_POSIX_ACL
 500                 if (lmd.posix_acl) {
 501                         posix_acl_release(lmd.posix_acl);
 502                         lmd.posix_acl = NULL;
 503                 }
 504 #endif
 505                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 506                 root = NULL;
 507                 CERROR("lustre_lite: bad iget4 for root\n");
 508                 goto out_root;
 509         }
 510
 511         err = ll_close_thread_start(&sbi->ll_lcq);
 512         if (err) {
 513                 CERROR("cannot start close thread: rc %d\n", err);
 514                 goto out_root;
 515         }
 516
 517 #ifdef CONFIG_FS_POSIX_ACL
 518         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 519                 rct_init(&sbi->ll_rct);
 520                 et_init(&sbi->ll_et);
 521         }
 522 #endif
 523
 524         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 525         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 526                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 527                                  NULL);
 528         cl_sb_init(sb);
 529
 530         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 531                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 532                                  &sbi->ll_cache, NULL);
 533
 534         sb->s_root = d_make_root(root);
 535         if (sb->s_root == NULL) {
 536                 CERROR("%s: can't make root dentry\n",
 537                         ll_get_fsname(sb, NULL, 0));
 538                 err = -ENOMEM;
 539                 goto out_lock_cn_cb;
 540         }
 541
 542         sbi->ll_sdev_orig = sb->s_dev;
 543
 544         /* We set sb->s_dev equal on all lustre clients in order to support
 545          * NFS export clustering.  NFSD requires that the FSID be the same
 546          * on all clients. */
 547         /* s_dev is also used in lt_compare() to compare two fs, but that is
 548          * only a node-local comparison. */
 549         uuid = obd_get_uuid(sbi->ll_md_exp);
 550         if (uuid != NULL) {
 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         list_del(&sbi->ll_conn_chain);
 623
 624         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 625         obd_disconnect(sbi->ll_dt_exp);
 626         sbi->ll_dt_exp = NULL;
 627         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 628          * see LU-2543. */
 629         obd_zombie_barrier();
 630
 631         ldebugfs_unregister_mountpoint(sbi);
 632
 633         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 634         obd_disconnect(sbi->ll_md_exp);
 635         sbi->ll_md_exp = NULL;
 636 }
 637
 638 void ll_kill_super(struct super_block *sb)
 639 {
 640         struct ll_sb_info *sbi;
 641
 642         /* not init sb ?*/
 643         if (!(sb->s_flags & MS_ACTIVE))
 644                 return;
 645
 646         sbi = ll_s2sbi(sb);
 647         /* we need to restore s_dev from changed for clustered NFS before
 648          * put_super because new kernels have cached s_dev and change sb->s_dev
 649          * in put_super not affected real removing devices */
 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 == NULL)
 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         atomic_set(&lli->lli_open_count, 0);
 801         lli->lli_rmtperm_time = 0;
 802         lli->lli_pending_och = NULL;
 803         lli->lli_mds_read_och = NULL;
 804         lli->lli_mds_write_och = NULL;
 805         lli->lli_mds_exec_och = NULL;
 806         lli->lli_open_fd_read_count = 0;
 807         lli->lli_open_fd_write_count = 0;
 808         lli->lli_open_fd_exec_count = 0;
 809         mutex_init(&lli->lli_och_mutex);
 810         spin_lock_init(&lli->lli_agl_lock);
 811         lli->lli_has_smd = false;
 812         spin_lock_init(&lli->lli_layout_lock);
 813         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 814         lli->lli_clob = NULL;
 815
 816         init_rwsem(&lli->lli_xattrs_list_rwsem);
 817         mutex_init(&lli->lli_xattrs_enq_lock);
 818
 819         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 820         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 821                 mutex_init(&lli->lli_readdir_mutex);
 822                 lli->lli_opendir_key = NULL;
 823                 lli->lli_sai = NULL;
 824                 spin_lock_init(&lli->lli_sa_lock);
 825                 lli->lli_opendir_pid = 0;
 826         } else {
 827                 mutex_init(&lli->lli_size_mutex);
 828                 lli->lli_symlink_name = NULL;
 829                 init_rwsem(&lli->lli_trunc_sem);
 830                 mutex_init(&lli->lli_write_mutex);
 831                 init_rwsem(&lli->lli_glimpse_sem);
 832                 lli->lli_glimpse_time = 0;
 833                 INIT_LIST_HEAD(&lli->lli_agl_list);
 834                 lli->lli_agl_index = 0;
 835                 lli->lli_async_rc = 0;
 836         }
 837         mutex_init(&lli->lli_layout_mutex);
 838 }
 839
 840 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 841 {
 842         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 843
 844         bdi->name = "lustre";
 845         return bdi_register(bdi, NULL, "lustre-%d",
 846                             atomic_inc_return(&ll_bdi_num));
 847 }
 848
 849 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 850 {
 851         struct lustre_profile *lprof = NULL;
 852         struct lustre_sb_info *lsi = s2lsi(sb);
 853         struct ll_sb_info *sbi;
 854         char  *dt = NULL, *md = NULL;
 855         char  *profilenm = get_profile_name(sb);
 856         struct config_llog_instance *cfg;
 857         int    err;
 858
 859         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 860
 861         cfg = kzalloc(sizeof(*cfg), GFP_NOFS);
 862         if (!cfg)
 863                 return -ENOMEM;
 864
 865         try_module_get(THIS_MODULE);
 866
 867         /* client additional sb info */
 868         lsi->lsi_llsbi = sbi = ll_init_sbi(sb);
 869         if (!sbi) {
 870                 module_put(THIS_MODULE);
 871                 kfree(cfg);
 872                 return -ENOMEM;
 873         }
 874
 875         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 876         if (err)
 877                 goto out_free;
 878
 879         err = bdi_init(&lsi->lsi_bdi);
 880         if (err)
 881                 goto out_free;
 882         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 883         lsi->lsi_bdi.capabilities = 0;
 884         err = ll_bdi_register(&lsi->lsi_bdi);
 885         if (err)
 886                 goto out_free;
 887
 888         sb->s_bdi = &lsi->lsi_bdi;
 889         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 890         sb->s_d_op = &ll_d_ops;
 891
 892         /* Generate a string unique to this super, in case some joker tries
 893            to mount the same fs at two mount points.
 894            Use the address of the super itself.*/
 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 == NULL) {
 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         if (force) {
 969                 next = 0;
 970                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
 971                                                      &next)) != NULL) {
 972                         obd->obd_force = force;
 973                 }
 974         }
 975
 976         if (sbi->ll_lcq) {
 977                 /* Only if client_common_fill_super succeeded */
 978                 client_common_put_super(sb);
 979         }
 980
 981         next = 0;
 982         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
 983                 class_manual_cleanup(obd);
 984
 985         if (sbi->ll_flags & LL_SBI_VERBOSE)
 986                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
 987
 988         if (profilenm)
 989                 class_del_profile(profilenm);
 990
 991         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
 992                 bdi_destroy(&lsi->lsi_bdi);
 993                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
 994         }
 995
 996         ll_free_sbi(sb);
 997         lsi->lsi_llsbi = NULL;
 998
 999         lustre_common_put_super(sb);
1000
1001         module_put(THIS_MODULE);
1002 } /* client_put_super */
1003
1004 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1005 {
1006         struct inode *inode = NULL;
1007
1008         /* NOTE: we depend on atomic igrab() -bzzz */
1009         lock_res_and_lock(lock);
1010         if (lock->l_resource->lr_lvb_inode) {
1011                 struct ll_inode_info *lli;
1012
1013                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1014                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1015                         inode = igrab(lock->l_resource->lr_lvb_inode);
1016                 } else {
1017                         inode = lock->l_resource->lr_lvb_inode;
1018                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1019                                          D_WARNING, lock, "lr_lvb_inode %p is bogus: magic %08x",
1020                                          lock->l_resource->lr_lvb_inode,
1021                                          lli->lli_inode_magic);
1022                         inode = NULL;
1023                 }
1024         }
1025         unlock_res_and_lock(lock);
1026         return inode;
1027 }
1028
1029 void ll_clear_inode(struct inode *inode)
1030 {
1031         struct ll_inode_info *lli = ll_i2info(inode);
1032         struct ll_sb_info *sbi = ll_i2sbi(inode);
1033
1034         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1035                inode->i_generation, inode);
1036
1037         if (S_ISDIR(inode->i_mode)) {
1038                 /* these should have been cleared in ll_file_release */
1039                 LASSERT(lli->lli_opendir_key == NULL);
1040                 LASSERT(lli->lli_sai == NULL);
1041                 LASSERT(lli->lli_opendir_pid == 0);
1042         }
1043
1044         spin_lock(&lli->lli_lock);
1045         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1046         spin_unlock(&lli->lli_lock);
1047         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1048
1049         LASSERT(!lli->lli_open_fd_write_count);
1050         LASSERT(!lli->lli_open_fd_read_count);
1051         LASSERT(!lli->lli_open_fd_exec_count);
1052
1053         if (lli->lli_mds_write_och)
1054                 ll_md_real_close(inode, FMODE_WRITE);
1055         if (lli->lli_mds_exec_och)
1056                 ll_md_real_close(inode, FMODE_EXEC);
1057         if (lli->lli_mds_read_och)
1058                 ll_md_real_close(inode, FMODE_READ);
1059
1060         if (S_ISLNK(inode->i_mode)) {
1061                 kfree(lli->lli_symlink_name);
1062                 lli->lli_symlink_name = NULL;
1063         }
1064
1065         ll_xattr_cache_destroy(inode);
1066
1067         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1068                 LASSERT(lli->lli_posix_acl == NULL);
1069                 if (lli->lli_remote_perms) {
1070                         free_rmtperm_hash(lli->lli_remote_perms);
1071                         lli->lli_remote_perms = NULL;
1072                 }
1073         }
1074 #ifdef CONFIG_FS_POSIX_ACL
1075         else if (lli->lli_posix_acl) {
1076                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1077                 LASSERT(lli->lli_remote_perms == NULL);
1078                 posix_acl_release(lli->lli_posix_acl);
1079                 lli->lli_posix_acl = NULL;
1080         }
1081 #endif
1082         lli->lli_inode_magic = LLI_INODE_DEAD;
1083
1084         if (!S_ISDIR(inode->i_mode))
1085                 LASSERT(list_empty(&lli->lli_agl_list));
1086
1087         /*
1088          * XXX This has to be done before lsm is freed below, because
1089          * cl_object still uses inode lsm.
1090          */
1091         cl_inode_fini(inode);
1092         lli->lli_has_smd = false;
1093 }
1094
1095 #define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
1096
1097 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1098                   struct md_open_data **mod)
1099 {
1100         struct lustre_md md;
1101         struct inode *inode = d_inode(dentry);
1102         struct ll_sb_info *sbi = ll_i2sbi(inode);
1103         struct ptlrpc_request *request = NULL;
1104         int rc, ia_valid;
1105
1106         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1107                                      LUSTRE_OPC_ANY, NULL);
1108         if (IS_ERR(op_data))
1109                 return PTR_ERR(op_data);
1110
1111         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1112                         &request, mod);
1113         if (rc) {
1114                 ptlrpc_req_finished(request);
1115                 if (rc == -ENOENT) {
1116                         clear_nlink(inode);
1117                         /* Unlinked special device node? Or just a race?
1118                          * Pretend we done everything. */
1119                         if (!S_ISREG(inode->i_mode) &&
1120                             !S_ISDIR(inode->i_mode)) {
1121                                 ia_valid = op_data->op_attr.ia_valid;
1122                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1123                                 rc = simple_setattr(dentry, &op_data->op_attr);
1124                                 op_data->op_attr.ia_valid = ia_valid;
1125                         }
1126                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1127                         CERROR("md_setattr fails: rc = %d\n", rc);
1128                 }
1129                 return rc;
1130         }
1131
1132         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1133                               sbi->ll_md_exp, &md);
1134         if (rc) {
1135                 ptlrpc_req_finished(request);
1136                 return rc;
1137         }
1138
1139         ia_valid = op_data->op_attr.ia_valid;
1140         /* inode size will be in cl_setattr_ost, can't do it now since dirty
1141          * cache is not cleared yet. */
1142         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1143         rc = simple_setattr(dentry, &op_data->op_attr);
1144         op_data->op_attr.ia_valid = ia_valid;
1145
1146         /* Extract epoch data if obtained. */
1147         op_data->op_handle = md.body->handle;
1148         op_data->op_ioepoch = md.body->ioepoch;
1149
1150         ll_update_inode(inode, &md);
1151         ptlrpc_req_finished(request);
1152
1153         return rc;
1154 }
1155
1156 /* Close IO epoch and send Size-on-MDS attribute update. */
1157 static int ll_setattr_done_writing(struct inode *inode,
1158                                    struct md_op_data *op_data,
1159                                    struct md_open_data *mod)
1160 {
1161         struct ll_inode_info *lli = ll_i2info(inode);
1162         int rc = 0;
1163
1164         LASSERT(op_data != NULL);
1165         if (!S_ISREG(inode->i_mode))
1166                 return 0;
1167
1168         CDEBUG(D_INODE, "Epoch %llu closed on "DFID" for truncate\n",
1169                op_data->op_ioepoch, PFID(&lli->lli_fid));
1170
1171         op_data->op_flags = MF_EPOCH_CLOSE;
1172         ll_done_writing_attr(inode, op_data);
1173         ll_pack_inode2opdata(inode, op_data, NULL);
1174
1175         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1176         if (rc == -EAGAIN)
1177                 /* MDS has instructed us to obtain Size-on-MDS attribute
1178                  * from OSTs and send setattr to back to MDS. */
1179                 rc = ll_som_update(inode, op_data);
1180         else if (rc)
1181                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1182                        inode->i_ino, rc);
1183         return rc;
1184 }
1185
1186 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1187  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1188  * keep these values until such a time that objects are allocated for it.
1189  * We do the MDS operations first, as it is checking permissions for us.
1190  * We don't to the MDS RPC if there is nothing that we want to store there,
1191  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1192  * going to do an RPC anyways.
1193  *
1194  * If we are doing a truncate, we will send the mtime and ctime updates
1195  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1196  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1197  * at the same time.
1198  *
1199  * In case of HSMimport, we only set attr on MDS.
1200  */
1201 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1202 {
1203         struct inode *inode = d_inode(dentry);
1204         struct ll_inode_info *lli = ll_i2info(inode);
1205         struct md_op_data *op_data = NULL;
1206         struct md_open_data *mod = NULL;
1207         bool file_is_released = false;
1208         int rc = 0, rc1 = 0;
1209
1210         CDEBUG(D_VFSTRACE,
1211                 "%s: setattr inode %p/fid:"DFID
1212                 " from %llu to %llu, valid %x, hsm_import %d\n",
1213                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1214                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1215                 attr->ia_valid, hsm_import);
1216
1217         if (attr->ia_valid & ATTR_SIZE) {
1218                 /* Check new size against VFS/VM file size limit and rlimit */
1219                 rc = inode_newsize_ok(inode, attr->ia_size);
1220                 if (rc)
1221                         return rc;
1222
1223                 /* The maximum Lustre file size is variable, based on the
1224                  * OST maximum object size and number of stripes.  This
1225                  * needs another check in addition to the VFS check above. */
1226                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1227                         CDEBUG(D_INODE, "file "DFID" too large %llu > %llu\n",
1228                                PFID(&lli->lli_fid), attr->ia_size,
1229                                ll_file_maxbytes(inode));
1230                         return -EFBIG;
1231                 }
1232
1233                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1234         }
1235
1236         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1237         if (attr->ia_valid & TIMES_SET_FLAGS) {
1238                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1239                     !capable(CFS_CAP_FOWNER))
1240                         return -EPERM;
1241         }
1242
1243         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1244         if (attr->ia_valid & ATTR_CTIME) {
1245                 attr->ia_ctime = CURRENT_TIME;
1246                 attr->ia_valid |= ATTR_CTIME_SET;
1247         }
1248         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1249             (attr->ia_valid & ATTR_ATIME)) {
1250                 attr->ia_atime = CURRENT_TIME;
1251                 attr->ia_valid |= ATTR_ATIME_SET;
1252         }
1253         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1254             (attr->ia_valid & ATTR_MTIME)) {
1255                 attr->ia_mtime = CURRENT_TIME;
1256                 attr->ia_valid |= ATTR_MTIME_SET;
1257         }
1258
1259         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1260                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
1261                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1262                        (s64)ktime_get_real_seconds());
1263
1264         /* If we are changing file size, file content is modified, flag it. */
1265         if (attr->ia_valid & ATTR_SIZE) {
1266                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1267                 spin_lock(&lli->lli_lock);
1268                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1269                 spin_unlock(&lli->lli_lock);
1270         }
1271
1272         /* We always do an MDS RPC, even if we're only changing the size;
1273          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1274
1275         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1276         if (!op_data)
1277                 return -ENOMEM;
1278
1279         if (!S_ISDIR(inode->i_mode))
1280                 mutex_unlock(&inode->i_mutex);
1281
1282         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1283
1284         /* Open epoch for truncate. */
1285         if (exp_connect_som(ll_i2mdexp(inode)) &&
1286             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1287                 op_data->op_flags = MF_EPOCH_OPEN;
1288
1289         /* truncate on a released file must failed with -ENODATA,
1290          * so size must not be set on MDS for released file
1291          * but other attributes must be set
1292          */
1293         if (S_ISREG(inode->i_mode)) {
1294                 struct lov_stripe_md *lsm;
1295                 __u32 gen;
1296
1297                 ll_layout_refresh(inode, &gen);
1298                 lsm = ccc_inode_lsm_get(inode);
1299                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1300                         file_is_released = true;
1301                 ccc_inode_lsm_put(inode, lsm);
1302         }
1303
1304         /* if not in HSM import mode, clear size attr for released file
1305          * we clear the attribute send to MDT in op_data, not the original
1306          * received from caller in attr which is used later to
1307          * decide return code */
1308         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1309                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1310
1311         rc = ll_md_setattr(dentry, op_data, &mod);
1312         if (rc)
1313                 goto out;
1314
1315         /* truncate failed (only when non HSM import), others succeed */
1316         if (file_is_released) {
1317                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1318                         rc = -ENODATA;
1319                 else
1320                         rc = 0;
1321                 goto out;
1322         }
1323
1324         /* RPC to MDT is sent, cancel data modification flag */
1325         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1326                 spin_lock(&lli->lli_lock);
1327                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1328                 spin_unlock(&lli->lli_lock);
1329         }
1330
1331         ll_ioepoch_open(lli, op_data->op_ioepoch);
1332         if (!S_ISREG(inode->i_mode)) {
1333                 rc = 0;
1334                 goto out;
1335         }
1336
1337         if (attr->ia_valid & (ATTR_SIZE |
1338                               ATTR_ATIME | ATTR_ATIME_SET |
1339                               ATTR_MTIME | ATTR_MTIME_SET)) {
1340                 /* For truncate and utimes sending attributes to OSTs, setting
1341                  * mtime/atime to the past will be performed under PW [0:EOF]
1342                  * extent lock (new_size:EOF for truncate).  It may seem
1343                  * excessive to send mtime/atime updates to OSTs when not
1344                  * setting times to past, but it is necessary due to possible
1345                  * time de-synchronization between MDT inode and OST objects */
1346                 if (attr->ia_valid & ATTR_SIZE)
1347                         down_write(&lli->lli_trunc_sem);
1348                 rc = cl_setattr_ost(inode, attr);
1349                 if (attr->ia_valid & ATTR_SIZE)
1350                         up_write(&lli->lli_trunc_sem);
1351         }
1352 out:
1353         if (op_data->op_ioepoch) {
1354                 rc1 = ll_setattr_done_writing(inode, op_data, mod);
1355                 if (!rc)
1356                         rc = rc1;
1357         }
1358         ll_finish_md_op_data(op_data);
1359
1360         if (!S_ISDIR(inode->i_mode)) {
1361                 mutex_lock(&inode->i_mutex);
1362                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1363                         inode_dio_wait(inode);
1364         }
1365
1366         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1367                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1368
1369         return rc;
1370 }
1371
1372 int ll_setattr(struct dentry *de, struct iattr *attr)
1373 {
1374         int mode = d_inode(de)->i_mode;
1375
1376         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1377                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1378                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1379
1380         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1381                                (ATTR_SIZE|ATTR_MODE)) &&
1382             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1383              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1384               !(attr->ia_mode & S_ISGID))))
1385                 attr->ia_valid |= ATTR_FORCE;
1386
1387         if ((attr->ia_valid & ATTR_MODE) &&
1388             (mode & S_ISUID) &&
1389             !(attr->ia_mode & S_ISUID) &&
1390             !(attr->ia_valid & ATTR_KILL_SUID))
1391                 attr->ia_valid |= ATTR_KILL_SUID;
1392
1393         if ((attr->ia_valid & ATTR_MODE) &&
1394             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1395             !(attr->ia_mode & S_ISGID) &&
1396             !(attr->ia_valid & ATTR_KILL_SGID))
1397                 attr->ia_valid |= ATTR_KILL_SGID;
1398
1399         return ll_setattr_raw(de, attr, false);
1400 }
1401
1402 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1403                        __u64 max_age, __u32 flags)
1404 {
1405         struct ll_sb_info *sbi = ll_s2sbi(sb);
1406         struct obd_statfs obd_osfs;
1407         int rc;
1408
1409         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1410         if (rc) {
1411                 CERROR("md_statfs fails: rc = %d\n", rc);
1412                 return rc;
1413         }
1414
1415         osfs->os_type = sb->s_magic;
1416
1417         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1418                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,
1419                osfs->os_files);
1420
1421         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1422                 flags |= OBD_STATFS_NODELAY;
1423
1424         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1425         if (rc) {
1426                 CERROR("obd_statfs fails: rc = %d\n", rc);
1427                 return rc;
1428         }
1429
1430         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1431                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1432                obd_osfs.os_files);
1433
1434         osfs->os_bsize = obd_osfs.os_bsize;
1435         osfs->os_blocks = obd_osfs.os_blocks;
1436         osfs->os_bfree = obd_osfs.os_bfree;
1437         osfs->os_bavail = obd_osfs.os_bavail;
1438
1439         /* If we don't have as many objects free on the OST as inodes
1440          * on the MDS, we reduce the total number of inodes to
1441          * compensate, so that the "inodes in use" number is correct.
1442          */
1443         if (obd_osfs.os_ffree < osfs->os_ffree) {
1444                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1445                         obd_osfs.os_ffree;
1446                 osfs->os_ffree = obd_osfs.os_ffree;
1447         }
1448
1449         return rc;
1450 }
1451
1452 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1453 {
1454         struct super_block *sb = de->d_sb;
1455         struct obd_statfs osfs;
1456         int rc;
1457
1458         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1459         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1460
1461         /* Some amount of caching on the client is allowed */
1462         rc = ll_statfs_internal(sb, &osfs,
1463                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1464                                 0);
1465         if (rc)
1466                 return rc;
1467
1468         statfs_unpack(sfs, &osfs);
1469
1470         /* We need to downshift for all 32-bit kernels, because we can't
1471          * tell if the kernel is being called via sys_statfs64() or not.
1472          * Stop before overflowing f_bsize - in which case it is better
1473          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1474         if (sizeof(long) < 8) {
1475                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1476                         sfs->f_bsize <<= 1;
1477
1478                         osfs.os_blocks >>= 1;
1479                         osfs.os_bfree >>= 1;
1480                         osfs.os_bavail >>= 1;
1481                 }
1482         }
1483
1484         sfs->f_blocks = osfs.os_blocks;
1485         sfs->f_bfree = osfs.os_bfree;
1486         sfs->f_bavail = osfs.os_bavail;
1487         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1488         return 0;
1489 }
1490
1491 void ll_inode_size_lock(struct inode *inode)
1492 {
1493         struct ll_inode_info *lli;
1494
1495         LASSERT(!S_ISDIR(inode->i_mode));
1496
1497         lli = ll_i2info(inode);
1498         mutex_lock(&lli->lli_size_mutex);
1499 }
1500
1501 void ll_inode_size_unlock(struct inode *inode)
1502 {
1503         struct ll_inode_info *lli;
1504
1505         lli = ll_i2info(inode);
1506         mutex_unlock(&lli->lli_size_mutex);
1507 }
1508
1509 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1510 {
1511         struct ll_inode_info *lli = ll_i2info(inode);
1512         struct mdt_body *body = md->body;
1513         struct lov_stripe_md *lsm = md->lsm;
1514         struct ll_sb_info *sbi = ll_i2sbi(inode);
1515
1516         LASSERT((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1517         if (lsm != NULL) {
1518                 if (!lli->lli_has_smd &&
1519                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1520                         cl_file_inode_init(inode, md);
1521
1522                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1523                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1524                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1525         }
1526
1527         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1528                 if (body->valid & OBD_MD_FLRMTPERM)
1529                         ll_update_remote_perm(inode, md->remote_perm);
1530         }
1531 #ifdef CONFIG_FS_POSIX_ACL
1532         else if (body->valid & OBD_MD_FLACL) {
1533                 spin_lock(&lli->lli_lock);
1534                 if (lli->lli_posix_acl)
1535                         posix_acl_release(lli->lli_posix_acl);
1536                 lli->lli_posix_acl = md->posix_acl;
1537                 spin_unlock(&lli->lli_lock);
1538         }
1539 #endif
1540         inode->i_ino = cl_fid_build_ino(&body->fid1,
1541                                         sbi->ll_flags & LL_SBI_32BIT_API);
1542         inode->i_generation = cl_fid_build_gen(&body->fid1);
1543
1544         if (body->valid & OBD_MD_FLATIME) {
1545                 if (body->atime > LTIME_S(inode->i_atime))
1546                         LTIME_S(inode->i_atime) = body->atime;
1547                 lli->lli_lvb.lvb_atime = body->atime;
1548         }
1549         if (body->valid & OBD_MD_FLMTIME) {
1550                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1551                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
1552                                inode->i_ino, LTIME_S(inode->i_mtime),
1553                                body->mtime);
1554                         LTIME_S(inode->i_mtime) = body->mtime;
1555                 }
1556                 lli->lli_lvb.lvb_mtime = body->mtime;
1557         }
1558         if (body->valid & OBD_MD_FLCTIME) {
1559                 if (body->ctime > LTIME_S(inode->i_ctime))
1560                         LTIME_S(inode->i_ctime) = body->ctime;
1561                 lli->lli_lvb.lvb_ctime = body->ctime;
1562         }
1563         if (body->valid & OBD_MD_FLMODE)
1564                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1565         if (body->valid & OBD_MD_FLTYPE)
1566                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1567         LASSERT(inode->i_mode != 0);
1568         if (S_ISREG(inode->i_mode))
1569                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1570                                        LL_MAX_BLKSIZE_BITS);
1571         else
1572                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1573         if (body->valid & OBD_MD_FLUID)
1574                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1575         if (body->valid & OBD_MD_FLGID)
1576                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1577         if (body->valid & OBD_MD_FLFLAGS)
1578                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1579         if (body->valid & OBD_MD_FLNLINK)
1580                 set_nlink(inode, body->nlink);
1581         if (body->valid & OBD_MD_FLRDEV)
1582                 inode->i_rdev = old_decode_dev(body->rdev);
1583
1584         if (body->valid & OBD_MD_FLID) {
1585                 /* FID shouldn't be changed! */
1586                 if (fid_is_sane(&lli->lli_fid)) {
1587                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1588                                  "Trying to change FID "DFID
1589                                  " to the "DFID", inode %lu/%u(%p)\n",
1590                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1591                                  inode->i_ino, inode->i_generation, inode);
1592                 } else
1593                         lli->lli_fid = body->fid1;
1594         }
1595
1596         LASSERT(fid_seq(&lli->lli_fid) != 0);
1597
1598         if (body->valid & OBD_MD_FLSIZE) {
1599                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1600                     S_ISREG(inode->i_mode)) {
1601                         struct lustre_handle lockh;
1602                         ldlm_mode_t mode;
1603
1604                         /* As it is possible a blocking ast has been processed
1605                          * by this time, we need to check there is an UPDATE
1606                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1607                          * it. */
1608                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1609                                                &lockh, LDLM_FL_CBPENDING,
1610                                                LCK_CR | LCK_CW |
1611                                                LCK_PR | LCK_PW);
1612                         if (mode) {
1613                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1614                                                       LLIF_EPOCH_PENDING |
1615                                                       LLIF_SOM_DIRTY)) {
1616                                         CERROR("ino %lu flags %u still has size authority! do not trust the size got from MDS\n",
1617                                                inode->i_ino, lli->lli_flags);
1618                                 } else {
1619                                         /* Use old size assignment to avoid
1620                                          * deadlock bz14138 & bz14326 */
1621                                         i_size_write(inode, body->size);
1622                                         spin_lock(&lli->lli_lock);
1623                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1624                                         spin_unlock(&lli->lli_lock);
1625                                 }
1626                                 ldlm_lock_decref(&lockh, mode);
1627                         }
1628                 } else {
1629                         /* Use old size assignment to avoid
1630                          * deadlock bz14138 & bz14326 */
1631                         i_size_write(inode, body->size);
1632
1633                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1634                                inode->i_ino, (unsigned long long)body->size);
1635                 }
1636
1637                 if (body->valid & OBD_MD_FLBLOCKS)
1638                         inode->i_blocks = body->blocks;
1639         }
1640
1641         if (body->valid & OBD_MD_TSTATE) {
1642                 if (body->t_state & MS_RESTORE)
1643                         lli->lli_flags |= LLIF_FILE_RESTORING;
1644         }
1645 }
1646
1647 void ll_read_inode2(struct inode *inode, void *opaque)
1648 {
1649         struct lustre_md *md = opaque;
1650         struct ll_inode_info *lli = ll_i2info(inode);
1651
1652         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1653                PFID(&lli->lli_fid), inode);
1654
1655         LASSERT(!lli->lli_has_smd);
1656
1657         /* Core attributes from the MDS first.  This is a new inode, and
1658          * the VFS doesn't zero times in the core inode so we have to do
1659          * it ourselves.  They will be overwritten by either MDS or OST
1660          * attributes - we just need to make sure they aren't newer. */
1661         LTIME_S(inode->i_mtime) = 0;
1662         LTIME_S(inode->i_atime) = 0;
1663         LTIME_S(inode->i_ctime) = 0;
1664         inode->i_rdev = 0;
1665         ll_update_inode(inode, md);
1666
1667         /* OIDEBUG(inode); */
1668
1669         if (S_ISREG(inode->i_mode)) {
1670                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1671
1672                 inode->i_op = &ll_file_inode_operations;
1673                 inode->i_fop = sbi->ll_fop;
1674                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1675         } else if (S_ISDIR(inode->i_mode)) {
1676                 inode->i_op = &ll_dir_inode_operations;
1677                 inode->i_fop = &ll_dir_operations;
1678         } else if (S_ISLNK(inode->i_mode)) {
1679                 inode->i_op = &ll_fast_symlink_inode_operations;
1680         } else {
1681                 inode->i_op = &ll_special_inode_operations;
1682
1683                 init_special_inode(inode, inode->i_mode,
1684                                    inode->i_rdev);
1685         }
1686 }
1687
1688 void ll_delete_inode(struct inode *inode)
1689 {
1690         struct cl_inode_info *lli = cl_i2info(inode);
1691
1692         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1693                 /* discard all dirty pages before truncating them, required by
1694                  * osc_extent implementation at LU-1030. */
1695                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1696                                    CL_FSYNC_DISCARD, 1);
1697
1698         truncate_inode_pages_final(&inode->i_data);
1699
1700         /* Workaround for LU-118 */
1701         if (inode->i_data.nrpages) {
1702                 spin_lock_irq(&inode->i_data.tree_lock);
1703                 spin_unlock_irq(&inode->i_data.tree_lock);
1704                 LASSERTF(inode->i_data.nrpages == 0,
1705                          "inode=%lu/%u(%p) nrpages=%lu, see http://jira.whamcloud.com/browse/LU-118\n",
1706                          inode->i_ino, inode->i_generation, inode,
1707                          inode->i_data.nrpages);
1708         }
1709         /* Workaround end */
1710
1711         ll_clear_inode(inode);
1712         clear_inode(inode);
1713 }
1714
1715 int ll_iocontrol(struct inode *inode, struct file *file,
1716                  unsigned int cmd, unsigned long arg)
1717 {
1718         struct ll_sb_info *sbi = ll_i2sbi(inode);
1719         struct ptlrpc_request *req = NULL;
1720         int rc, flags = 0;
1721
1722         switch (cmd) {
1723         case FSFILT_IOC_GETFLAGS: {
1724                 struct mdt_body *body;
1725                 struct md_op_data *op_data;
1726
1727                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1728                                              0, 0, LUSTRE_OPC_ANY,
1729                                              NULL);
1730                 if (IS_ERR(op_data))
1731                         return PTR_ERR(op_data);
1732
1733                 op_data->op_valid = OBD_MD_FLFLAGS;
1734                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1735                 ll_finish_md_op_data(op_data);
1736                 if (rc) {
1737                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1738                         return -abs(rc);
1739                 }
1740
1741                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1742
1743                 flags = body->flags;
1744
1745                 ptlrpc_req_finished(req);
1746
1747                 return put_user(flags, (int *)arg);
1748         }
1749         case FSFILT_IOC_SETFLAGS: {
1750                 struct lov_stripe_md *lsm;
1751                 struct obd_info oinfo = { };
1752                 struct md_op_data *op_data;
1753
1754                 if (get_user(flags, (int *)arg))
1755                         return -EFAULT;
1756
1757                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1758                                              LUSTRE_OPC_ANY, NULL);
1759                 if (IS_ERR(op_data))
1760                         return PTR_ERR(op_data);
1761
1762                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1763                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1764                 rc = md_setattr(sbi->ll_md_exp, op_data,
1765                                 NULL, 0, NULL, 0, &req, NULL);
1766                 ll_finish_md_op_data(op_data);
1767                 ptlrpc_req_finished(req);
1768                 if (rc)
1769                         return rc;
1770
1771                 inode->i_flags = ll_ext_to_inode_flags(flags);
1772
1773                 lsm = ccc_inode_lsm_get(inode);
1774                 if (!lsm_has_objects(lsm)) {
1775                         ccc_inode_lsm_put(inode, lsm);
1776                         return 0;
1777                 }
1778
1779                 oinfo.oi_oa = kmem_cache_alloc(obdo_cachep,
1780                                                GFP_NOFS | __GFP_ZERO);
1781                 if (!oinfo.oi_oa) {
1782                         ccc_inode_lsm_put(inode, lsm);
1783                         return -ENOMEM;
1784                 }
1785                 oinfo.oi_md = lsm;
1786                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1787                 oinfo.oi_oa->o_flags = flags;
1788                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1789                                        OBD_MD_FLGROUP;
1790                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1791                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1792                 kmem_cache_free(obdo_cachep, oinfo.oi_oa);
1793                 ccc_inode_lsm_put(inode, lsm);
1794
1795                 if (rc && rc != -EPERM && rc != -EACCES)
1796                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1797
1798                 return rc;
1799         }
1800         default:
1801                 return -ENOSYS;
1802         }
1803
1804         return 0;
1805 }
1806
1807 int ll_flush_ctx(struct inode *inode)
1808 {
1809         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1810
1811         CDEBUG(D_SEC, "flush context for user %d\n",
1812                       from_kuid(&init_user_ns, current_uid()));
1813
1814         obd_set_info_async(NULL, sbi->ll_md_exp,
1815                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1816                            0, NULL, NULL);
1817         obd_set_info_async(NULL, sbi->ll_dt_exp,
1818                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1819                            0, NULL, NULL);
1820         return 0;
1821 }
1822
1823 /* umount -f client means force down, don't save state */
1824 void ll_umount_begin(struct super_block *sb)
1825 {
1826         struct ll_sb_info *sbi = ll_s2sbi(sb);
1827         struct obd_device *obd;
1828         struct obd_ioctl_data *ioc_data;
1829
1830         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1831                sb->s_count, atomic_read(&sb->s_active));
1832
1833         obd = class_exp2obd(sbi->ll_md_exp);
1834         if (obd == NULL) {
1835                 CERROR("Invalid MDC connection handle %#llx\n",
1836                        sbi->ll_md_exp->exp_handle.h_cookie);
1837                 return;
1838         }
1839         obd->obd_force = 1;
1840
1841         obd = class_exp2obd(sbi->ll_dt_exp);
1842         if (obd == NULL) {
1843                 CERROR("Invalid LOV connection handle %#llx\n",
1844                        sbi->ll_dt_exp->exp_handle.h_cookie);
1845                 return;
1846         }
1847         obd->obd_force = 1;
1848
1849         ioc_data = kzalloc(sizeof(*ioc_data), GFP_NOFS);
1850         if (ioc_data) {
1851                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
1852                               sizeof(*ioc_data), ioc_data, NULL);
1853
1854                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
1855                               sizeof(*ioc_data), ioc_data, NULL);
1856
1857                 kfree(ioc_data);
1858         }
1859
1860         /* Really, we'd like to wait until there are no requests outstanding,
1861          * and then continue.  For now, we just invalidate the requests,
1862          * schedule() and sleep one second if needed, and hope.
1863          */
1864         schedule();
1865 }
1866
1867 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
1868 {
1869         struct ll_sb_info *sbi = ll_s2sbi(sb);
1870         char *profilenm = get_profile_name(sb);
1871         int err;
1872         __u32 read_only;
1873
1874         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
1875                 read_only = *flags & MS_RDONLY;
1876                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
1877                                          sizeof(KEY_READ_ONLY),
1878                                          KEY_READ_ONLY, sizeof(read_only),
1879                                          &read_only, NULL);
1880                 if (err) {
1881                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
1882                                       profilenm, read_only ?
1883                                       "read-only" : "read-write", err);
1884                         return err;
1885                 }
1886
1887                 if (read_only)
1888                         sb->s_flags |= MS_RDONLY;
1889                 else
1890                         sb->s_flags &= ~MS_RDONLY;
1891
1892                 if (sbi->ll_flags & LL_SBI_VERBOSE)
1893                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
1894                                       read_only ?  "read-only" : "read-write");
1895         }
1896         return 0;
1897 }
1898
1899 /**
1900  * Cleanup the open handle that is cached on MDT-side.
1901  *
1902  * For open case, the client side open handling thread may hit error
1903  * after the MDT grant the open. Under such case, the client should
1904  * send close RPC to the MDT as cleanup; otherwise, the open handle
1905  * on the MDT will be leaked there until the client umount or evicted.
1906  *
1907  * In further, if someone unlinked the file, because the open handle
1908  * holds the reference on such file/object, then it will block the
1909  * subsequent threads that want to locate such object via FID.
1910  *
1911  * \param[in] sb        super block for this file-system
1912  * \param[in] open_req  pointer to the original open request
1913  */
1914 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
1915 {
1916         struct mdt_body                 *body;
1917         struct md_op_data               *op_data;
1918         struct ptlrpc_request           *close_req = NULL;
1919         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
1920
1921         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
1922         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1923         if (!op_data) {
1924                 CWARN("%s: cannot allocate op_data to release open handle for "
1925                       DFID "\n",
1926                       ll_get_fsname(sb, NULL, 0), PFID(&body->fid1));
1927
1928                 return;
1929         }
1930
1931         op_data->op_fid1 = body->fid1;
1932         op_data->op_ioepoch = body->ioepoch;
1933         op_data->op_handle = body->handle;
1934         op_data->op_mod_time = get_seconds();
1935         md_close(exp, op_data, NULL, &close_req);
1936         ptlrpc_req_finished(close_req);
1937         ll_finish_md_op_data(op_data);
1938 }
1939
1940 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
1941                   struct super_block *sb, struct lookup_intent *it)
1942 {
1943         struct ll_sb_info *sbi = NULL;
1944         struct lustre_md md;
1945         int rc;
1946
1947         LASSERT(*inode || sb);
1948         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
1949         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
1950                               sbi->ll_md_exp, &md);
1951         if (rc)
1952                 goto cleanup;
1953
1954         if (*inode) {
1955                 ll_update_inode(*inode, &md);
1956         } else {
1957                 LASSERT(sb != NULL);
1958
1959                 /*
1960                  * At this point server returns to client's same fid as client
1961                  * generated for creating. So using ->fid1 is okay here.
1962                  */
1963                 LASSERT(fid_is_sane(&md.body->fid1));
1964
1965                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
1966                                              sbi->ll_flags & LL_SBI_32BIT_API),
1967                                  &md);
1968                 if (*inode == NULL || IS_ERR(*inode)) {
1969 #ifdef CONFIG_FS_POSIX_ACL
1970                         if (md.posix_acl) {
1971                                 posix_acl_release(md.posix_acl);
1972                                 md.posix_acl = NULL;
1973                         }
1974 #endif
1975                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
1976                         *inode = NULL;
1977                         CERROR("new_inode -fatal: rc %d\n", rc);
1978                         goto out;
1979                 }
1980         }
1981
1982         /* Handling piggyback layout lock.
1983          * Layout lock can be piggybacked by getattr and open request.
1984          * The lsm can be applied to inode only if it comes with a layout lock
1985          * otherwise correct layout may be overwritten, for example:
1986          * 1. proc1: mdt returns a lsm but not granting layout
1987          * 2. layout was changed by another client
1988          * 3. proc2: refresh layout and layout lock granted
1989          * 4. proc1: to apply a stale layout */
1990         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
1991                 struct lustre_handle lockh;
1992                 struct ldlm_lock *lock;
1993
1994                 lockh.cookie = it->d.lustre.it_lock_handle;
1995                 lock = ldlm_handle2lock(&lockh);
1996                 LASSERT(lock != NULL);
1997                 if (ldlm_has_layout(lock)) {
1998                         struct cl_object_conf conf;
1999
2000                         memset(&conf, 0, sizeof(conf));
2001                         conf.coc_opc = OBJECT_CONF_SET;
2002                         conf.coc_inode = *inode;
2003                         conf.coc_lock = lock;
2004                         conf.u.coc_md = &md;
2005                         (void)ll_layout_conf(*inode, &conf);
2006                 }
2007                 LDLM_LOCK_PUT(lock);
2008         }
2009
2010 out:
2011         if (md.lsm != NULL)
2012                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2013         md_free_lustre_md(sbi->ll_md_exp, &md);
2014
2015 cleanup:
2016         if (rc != 0 && it && it->it_op & IT_OPEN)
2017                 ll_open_cleanup(sb ? sb : (*inode)->i_sb, req);
2018
2019         return rc;
2020 }
2021
2022 int ll_obd_statfs(struct inode *inode, void *arg)
2023 {
2024         struct ll_sb_info *sbi = NULL;
2025         struct obd_export *exp;
2026         char *buf = NULL;
2027         struct obd_ioctl_data *data = NULL;
2028         __u32 type;
2029         __u32 flags;
2030         int len = 0, rc;
2031
2032         if (!inode) {
2033                 rc = -EINVAL;
2034                 goto out_statfs;
2035         }
2036
2037         sbi = ll_i2sbi(inode);
2038         if (!sbi) {
2039                 rc = -EINVAL;
2040                 goto out_statfs;
2041         }
2042
2043         rc = obd_ioctl_getdata(&buf, &len, arg);
2044         if (rc)
2045                 goto out_statfs;
2046
2047         data = (void *)buf;
2048         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2049             !data->ioc_pbuf1 || !data->ioc_pbuf2) {
2050                 rc = -EINVAL;
2051                 goto out_statfs;
2052         }
2053
2054         if (data->ioc_inllen1 != sizeof(__u32) ||
2055             data->ioc_inllen2 != sizeof(__u32) ||
2056             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2057             data->ioc_plen2 != sizeof(struct obd_uuid)) {
2058                 rc = -EINVAL;
2059                 goto out_statfs;
2060         }
2061
2062         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2063         if (type & LL_STATFS_LMV)
2064                 exp = sbi->ll_md_exp;
2065         else if (type & LL_STATFS_LOV)
2066                 exp = sbi->ll_dt_exp;
2067         else {
2068                 rc = -ENODEV;
2069                 goto out_statfs;
2070         }
2071
2072         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2073         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2074         if (rc)
2075                 goto out_statfs;
2076 out_statfs:
2077         if (buf)
2078                 obd_ioctl_freedata(buf, len);
2079         return rc;
2080 }
2081
2082 int ll_process_config(struct lustre_cfg *lcfg)
2083 {
2084         char *ptr;
2085         void *sb;
2086         struct lprocfs_static_vars lvars;
2087         unsigned long x;
2088         int rc = 0;
2089
2090         lprocfs_llite_init_vars(&lvars);
2091
2092         /* The instance name contains the sb: lustre-client-aacfe000 */
2093         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2094         if (!ptr || !*(++ptr))
2095                 return -EINVAL;
2096         rc = kstrtoul(ptr, 16, &x);
2097         if (rc != 0)
2098                 return -EINVAL;
2099         sb = (void *)x;
2100         /* This better be a real Lustre superblock! */
2101         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2102
2103         /* Note we have not called client_common_fill_super yet, so
2104            proc fns must be able to handle that! */
2105         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2106                                       lcfg, sb);
2107         if (rc > 0)
2108                 rc = 0;
2109         return rc;
2110 }
2111
2112 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2113 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2114                                        struct inode *i1, struct inode *i2,
2115                                        const char *name, int namelen,
2116                                        int mode, __u32 opc, void *data)
2117 {
2118         LASSERT(i1 != NULL);
2119
2120         if (namelen > ll_i2sbi(i1)->ll_namelen)
2121                 return ERR_PTR(-ENAMETOOLONG);
2122
2123         if (op_data == NULL)
2124                 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
2125
2126         if (op_data == NULL)
2127                 return ERR_PTR(-ENOMEM);
2128
2129         ll_i2gids(op_data->op_suppgids, i1, i2);
2130         op_data->op_fid1 = *ll_inode2fid(i1);
2131
2132         if (i2)
2133                 op_data->op_fid2 = *ll_inode2fid(i2);
2134         else
2135                 fid_zero(&op_data->op_fid2);
2136
2137         op_data->op_name = name;
2138         op_data->op_namelen = namelen;
2139         op_data->op_mode = mode;
2140         op_data->op_mod_time = ktime_get_real_seconds();
2141         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2142         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2143         op_data->op_cap = cfs_curproc_cap_pack();
2144         op_data->op_bias = 0;
2145         op_data->op_cli_flags = 0;
2146         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2147              filename_is_volatile(name, namelen, NULL))
2148                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2149         op_data->op_opc = opc;
2150         op_data->op_mds = 0;
2151         op_data->op_data = data;
2152
2153         /* If the file is being opened after mknod() (normally due to NFS)
2154          * try to use the default stripe data from parent directory for
2155          * allocating OST objects.  Try to pass the parent FID to MDS. */
2156         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2157             !ll_i2info(i2)->lli_has_smd) {
2158                 struct ll_inode_info *lli = ll_i2info(i2);
2159
2160                 spin_lock(&lli->lli_lock);
2161                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2162                         op_data->op_fid1 = lli->lli_pfid;
2163                 spin_unlock(&lli->lli_lock);
2164         }
2165
2166         /* When called by ll_setattr_raw, file is i1. */
2167         if (ll_i2info(i1)->lli_flags & LLIF_DATA_MODIFIED)
2168                 op_data->op_bias |= MDS_DATA_MODIFIED;
2169
2170         return op_data;
2171 }
2172
2173 void ll_finish_md_op_data(struct md_op_data *op_data)
2174 {
2175         kfree(op_data);
2176 }
2177
2178 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2179 {
2180         struct ll_sb_info *sbi;
2181
2182         LASSERT((seq != NULL) && (dentry != NULL));
2183         sbi = ll_s2sbi(dentry->d_sb);
2184
2185         if (sbi->ll_flags & LL_SBI_NOLCK)
2186                 seq_puts(seq, ",nolock");
2187
2188         if (sbi->ll_flags & LL_SBI_FLOCK)
2189                 seq_puts(seq, ",flock");
2190
2191         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2192                 seq_puts(seq, ",localflock");
2193
2194         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2195                 seq_puts(seq, ",user_xattr");
2196
2197         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2198                 seq_puts(seq, ",lazystatfs");
2199
2200         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2201                 seq_puts(seq, ",user_fid2path");
2202
2203         return 0;
2204 }
2205
2206 /**
2207  * Get obd name by cmd, and copy out to user space
2208  */
2209 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2210 {
2211         struct ll_sb_info *sbi = ll_i2sbi(inode);
2212         struct obd_device *obd;
2213
2214         if (cmd == OBD_IOC_GETDTNAME)
2215                 obd = class_exp2obd(sbi->ll_dt_exp);
2216         else if (cmd == OBD_IOC_GETMDNAME)
2217                 obd = class_exp2obd(sbi->ll_md_exp);
2218         else
2219                 return -EINVAL;
2220
2221         if (!obd)
2222                 return -ENOENT;
2223
2224         if (copy_to_user((void *)arg, obd->obd_name,
2225                              strlen(obd->obd_name) + 1))
2226                 return -EFAULT;
2227
2228         return 0;
2229 }
2230
2231 /**
2232  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2233  * fsname will be returned in this buffer; otherwise, a static buffer will be
2234  * used to store the fsname and returned to caller.
2235  */
2236 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2237 {
2238         static char fsname_static[MTI_NAME_MAXLEN];
2239         struct lustre_sb_info *lsi = s2lsi(sb);
2240         char *ptr;
2241         int len;
2242
2243         if (buf == NULL) {
2244                 /* this means the caller wants to use static buffer
2245                  * and it doesn't care about race. Usually this is
2246                  * in error reporting path */
2247                 buf = fsname_static;
2248                 buflen = sizeof(fsname_static);
2249         }
2250
2251         len = strlen(lsi->lsi_lmd->lmd_profile);
2252         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2253         if (ptr && (strcmp(ptr, "-client") == 0))
2254                 len -= 7;
2255
2256         if (unlikely(len >= buflen))
2257                 len = buflen - 1;
2258         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2259         buf[len] = '\0';
2260
2261         return buf;
2262 }
2263
2264 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2265 {
2266         char *buf, *path = NULL;
2267         struct dentry *dentry = NULL;
2268         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2269
2270         /* this can be called inside spin lock so use GFP_ATOMIC. */
2271         buf = (char *)__get_free_page(GFP_ATOMIC);
2272         if (buf != NULL) {
2273                 dentry = d_find_alias(page->mapping->host);
2274                 if (dentry != NULL)
2275                         path = dentry_path_raw(dentry, buf, PAGE_SIZE);
2276         }
2277
2278         CDEBUG(D_WARNING,
2279                "%s: dirty page discard: %s/fid: " DFID "/%s may get corrupted (rc %d)\n",
2280                ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2281                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2282                PFID(&obj->cob_header.coh_lu.loh_fid),
2283                (path && !IS_ERR(path)) ? path : "", ioret);
2284
2285         if (dentry != NULL)
2286                 dput(dentry);
2287
2288         if (buf != NULL)
2289                 free_page((unsigned long)buf);
2290 }