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, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47
  48 #include <lustre_lite.h>
  49 #include <lustre_ha.h>
  50 #include <lustre_dlm.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_disk.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55 #include <cl_object.h>
  56 #include <obd_cksum.h>
  57 #include "llite_internal.h"
  58
  59 cfs_mem_cache_t *ll_file_data_slab;
  60
  61 CFS_LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) cfs_ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         struct sysinfo si;
  79         class_uuid_t uuid;
  80         int i;
  81         ENTRY;
  82
  83         OBD_ALLOC(sbi, sizeof(*sbi));
  84         if (!sbi)
  85                 RETURN(NULL);
  86
  87         cfs_spin_lock_init(&sbi->ll_lock);
  88         cfs_mutex_init(&sbi->ll_lco.lco_lock);
  89         cfs_spin_lock_init(&sbi->ll_pp_extent_lock);
  90         cfs_spin_lock_init(&sbi->ll_process_lock);
  91         sbi->ll_rw_stats_on = 0;
  92
  93         si_meminfo(&si);
  94         pages = si.totalram - si.totalhigh;
  95         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
  96 #ifdef HAVE_BGL_SUPPORT
  97                 sbi->ll_async_page_max = pages / 4;
  98 #else
  99                 sbi->ll_async_page_max = pages / 2;
 100 #endif
 101         } else {
 102                 sbi->ll_async_page_max = (pages / 4) * 3;
 103         }
 104
 105         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 106                                            SBI_DEFAULT_READAHEAD_MAX);
 107         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 108         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 109                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 110         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 111         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 112
 113         ll_generate_random_uuid(uuid);
 114         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 115         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 116
 117         cfs_spin_lock(&ll_sb_lock);
 118         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 119         cfs_spin_unlock(&ll_sb_lock);
 120
 121         sbi->ll_flags |= LL_SBI_VERBOSE;
 122 #ifdef ENABLE_CHECKSUM
 123         sbi->ll_flags |= LL_SBI_CHECKSUM;
 124 #endif
 125
 126 #ifdef HAVE_LRU_RESIZE_SUPPORT
 127         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 128 #endif
 129
 130         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 131                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
 132                                    pp_r_hist.oh_lock);
 133                 cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
 134                                    pp_w_hist.oh_lock);
 135         }
 136
 137         /* metadata statahead is enabled by default */
 138         sbi->ll_sa_max = LL_SA_RPC_DEF;
 139         cfs_atomic_set(&sbi->ll_sa_total, 0);
 140         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 141         cfs_atomic_set(&sbi->ll_agl_total, 0);
 142         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 143
 144         RETURN(sbi);
 145 }
 146
 147 void ll_free_sbi(struct super_block *sb)
 148 {
 149         struct ll_sb_info *sbi = ll_s2sbi(sb);
 150         ENTRY;
 151
 152         if (sbi != NULL) {
 153                 cfs_spin_lock(&ll_sb_lock);
 154                 cfs_list_del(&sbi->ll_list);
 155                 cfs_spin_unlock(&ll_sb_lock);
 156                 OBD_FREE(sbi, sizeof(*sbi));
 157         }
 158         EXIT;
 159 }
 160
 161 static struct dentry_operations ll_d_root_ops = {
 162         .d_compare = ll_dcompare,
 163         .d_revalidate = ll_revalidate_nd,
 164 };
 165
 166 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 167                                     struct vfsmount *mnt)
 168 {
 169         struct inode *root = 0;
 170         struct ll_sb_info *sbi = ll_s2sbi(sb);
 171         struct obd_device *obd;
 172         struct obd_capa *oc = NULL;
 173         struct obd_statfs *osfs = NULL;
 174         struct ptlrpc_request *request = NULL;
 175         struct obd_connect_data *data = NULL;
 176         struct obd_uuid *uuid;
 177         struct md_op_data *op_data;
 178         struct lustre_md lmd;
 179         obd_valid valid;
 180         int size, err, checksum;
 181         ENTRY;
 182
 183         obd = class_name2obd(md);
 184         if (!obd) {
 185                 CERROR("MD %s: not setup or attached\n", md);
 186                 RETURN(-EINVAL);
 187         }
 188
 189         OBD_ALLOC_PTR(data);
 190         if (data == NULL)
 191                 RETURN(-ENOMEM);
 192
 193         OBD_ALLOC_PTR(osfs);
 194         if (osfs == NULL) {
 195                 OBD_FREE_PTR(data);
 196                 RETURN(-ENOMEM);
 197         }
 198
 199         if (proc_lustre_fs_root) {
 200                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 201                                                   dt, md);
 202                 if (err < 0)
 203                         CERROR("could not register mount in /proc/fs/lustre\n");
 204         }
 205
 206         /* indicate the features supported by this client */
 207         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 208                                   OBD_CONNECT_ATTRFID  |
 209                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 210                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 211                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 212                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 213                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 214                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 215                                   OBD_CONNECT_EINPROGRESS |
 216                                   OBD_CONNECT_JOBSTATS;
 217
 218         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 219                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 220
 221 #ifdef HAVE_LRU_RESIZE_SUPPORT
 222         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 223                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 224 #endif
 225 #ifdef CONFIG_FS_POSIX_ACL
 226         data->ocd_connect_flags |= OBD_CONNECT_ACL;
 227 #endif
 228
 229         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 230                 /* flag mdc connection as lightweight, only used for test
 231                  * purpose, use with care */
 232                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 233
 234         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 235         data->ocd_version = LUSTRE_VERSION_CODE;
 236
 237         if (sb->s_flags & MS_RDONLY)
 238                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 239         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 240                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 241
 242 #ifdef HAVE_MS_FLOCK_LOCK
 243         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 244         sb->s_flags |= MS_FLOCK_LOCK;
 245 #endif
 246 #ifdef MS_HAS_NEW_AOPS
 247         sb->s_flags |= MS_HAS_NEW_AOPS;
 248 #endif
 249
 250         if (sbi->ll_flags & LL_SBI_FLOCK)
 251                 sbi->ll_fop = &ll_file_operations_flock;
 252         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 253                 sbi->ll_fop = &ll_file_operations;
 254         else
 255                 sbi->ll_fop = &ll_file_operations_noflock;
 256
 257         /* real client */
 258         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 259         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 260                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 261
 262         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 263
 264         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 265         if (err == -EBUSY) {
 266                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 267                                    "recovery, of which this client is not a "
 268                                    "part. Please wait for recovery to complete,"
 269                                    " abort, or time out.\n", md);
 270                 GOTO(out, err);
 271         } else if (err) {
 272                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 273                 GOTO(out, err);
 274         }
 275
 276         err = obd_fid_init(sbi->ll_md_exp);
 277         if (err) {
 278                 CERROR("Can't init metadata layer FID infrastructure, "
 279                        "rc %d\n", err);
 280                 GOTO(out_md, err);
 281         }
 282
 283         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 284                          cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
 285         if (err)
 286                 GOTO(out_md_fid, err);
 287
 288         /* This needs to be after statfs to ensure connect has finished.
 289          * Note that "data" does NOT contain the valid connect reply.
 290          * If connecting to a 1.8 server there will be no LMV device, so
 291          * we can access the MDC export directly and exp_connect_flags will
 292          * be non-zero, but if accessing an upgraded 2.1 server it will
 293          * have the correct flags filled in.
 294          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 295         valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
 296         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
 297             valid != CLIENT_CONNECT_MDT_REQD) {
 298                 char *buf;
 299
 300                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 301                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
 302                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 303                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 304                                    "feature(s) needed for correct operation "
 305                                    "of this client (%s). Please upgrade "
 306                                    "server or downgrade client.\n",
 307                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 308                 OBD_FREE(buf, CFS_PAGE_SIZE);
 309                 GOTO(out_md, err = -EPROTO);
 310         }
 311
 312         size = sizeof(*data);
 313         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 314                            KEY_CONN_DATA,  &size, data, NULL);
 315         if (err) {
 316                 CERROR("Get connect data failed: %d \n", err);
 317                 GOTO(out_md, err);
 318         }
 319
 320         LASSERT(osfs->os_bsize);
 321         sb->s_blocksize = osfs->os_bsize;
 322         sb->s_blocksize_bits = log2(osfs->os_bsize);
 323         sb->s_magic = LL_SUPER_MAGIC;
 324         sb->s_maxbytes = MAX_LFS_FILESIZE;
 325         sbi->ll_namelen = osfs->os_namelen;
 326         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 327
 328         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 329             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 330                 LCONSOLE_INFO("Disabling user_xattr feature because "
 331                               "it is not supported on the server\n");
 332                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 333         }
 334
 335         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 336 #ifdef MS_POSIXACL
 337                 sb->s_flags |= MS_POSIXACL;
 338 #endif
 339                 sbi->ll_flags |= LL_SBI_ACL;
 340         } else {
 341                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 342 #ifdef MS_POSIXACL
 343                 sb->s_flags &= ~MS_POSIXACL;
 344 #endif
 345                 sbi->ll_flags &= ~LL_SBI_ACL;
 346         }
 347
 348         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 349                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 350                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 351                         LCONSOLE_INFO("client is set as remote by default.\n");
 352                 }
 353         } else {
 354                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 355                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 356                         LCONSOLE_INFO("client claims to be remote, but server "
 357                                       "rejected, forced to be local.\n");
 358                 }
 359         }
 360
 361         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 362                 LCONSOLE_INFO("client enabled MDS capability!\n");
 363                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 364         }
 365
 366         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 367                 LCONSOLE_INFO("client enabled OSS capability!\n");
 368                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 369         }
 370
 371         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 372                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 373
 374         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 375                 sbi->ll_md_brw_size = data->ocd_brw_size;
 376         else
 377                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
 378
 379         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 380                 LCONSOLE_INFO("Layout lock feature supported.\n");
 381                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 382         }
 383
 384         obd = class_name2obd(dt);
 385         if (!obd) {
 386                 CERROR("DT %s: not setup or attached\n", dt);
 387                 GOTO(out_md_fid, err = -ENODEV);
 388         }
 389
 390         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 391                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 392                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 393                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 394                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 395                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 396                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 397                                   OBD_CONNECT_MAXBYTES |
 398                                   OBD_CONNECT_EINPROGRESS |
 399                                   OBD_CONNECT_JOBSTATS;
 400
 401         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 402                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 403
 404         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 405                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 406                  * disabled by default, because it can still be enabled on the
 407                  * fly via /proc. As a consequence, we still need to come to an
 408                  * agreement on the supported algorithms at connect time */
 409                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 410
 411                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 412                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 413                 else
 414                         data->ocd_cksum_types = cksum_types_supported_client();
 415         }
 416
 417 #ifdef HAVE_LRU_RESIZE_SUPPORT
 418         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 419 #endif
 420         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 421                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 422
 423         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 424                "ocd_grant: %d\n", data->ocd_connect_flags,
 425                data->ocd_version, data->ocd_grant);
 426
 427         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 428         obd->obd_upcall.onu_upcall = cl_ocd_update;
 429
 430         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 431
 432         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 433         if (err == -EBUSY) {
 434                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 435                                    "recovery, of which this client is not a "
 436                                    "part.  Please wait for recovery to "
 437                                    "complete, abort, or time out.\n", dt);
 438                 GOTO(out_md_fid, err);
 439         } else if (err) {
 440                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
 441                 GOTO(out_md_fid, err);
 442         }
 443
 444         err = obd_fid_init(sbi->ll_dt_exp);
 445         if (err) {
 446                 CERROR("Can't init data layer FID infrastructure, "
 447                        "rc %d\n", err);
 448                 GOTO(out_dt, err);
 449         }
 450
 451         cfs_mutex_lock(&sbi->ll_lco.lco_lock);
 452         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 453         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 454         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 455         cfs_mutex_unlock(&sbi->ll_lco.lco_lock);
 456
 457         fid_zero(&sbi->ll_root_fid);
 458         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 459         if (err) {
 460                 CERROR("cannot mds_connect: rc = %d\n", err);
 461                 GOTO(out_lock_cn_cb, err);
 462         }
 463         if (!fid_is_sane(&sbi->ll_root_fid)) {
 464                 CERROR("Invalid root fid during mount\n");
 465                 GOTO(out_lock_cn_cb, err = -EINVAL);
 466         }
 467         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 468
 469         sb->s_op = &lustre_super_operations;
 470 #if THREAD_SIZE >= 8192 /*b=17630*/
 471         sb->s_export_op = &lustre_export_operations;
 472 #endif
 473
 474         /* make root inode
 475          * XXX: move this to after cbd setup? */
 476         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 477         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 478                 valid |= OBD_MD_FLRMTPERM;
 479         else if (sbi->ll_flags & LL_SBI_ACL)
 480                 valid |= OBD_MD_FLACL;
 481
 482         OBD_ALLOC_PTR(op_data);
 483         if (op_data == NULL)
 484                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 485
 486         op_data->op_fid1 = sbi->ll_root_fid;
 487         op_data->op_mode = 0;
 488         op_data->op_capa1 = oc;
 489         op_data->op_valid = valid;
 490
 491         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 492         if (oc)
 493                 capa_put(oc);
 494         OBD_FREE_PTR(op_data);
 495         if (err) {
 496                 CERROR("md_getattr failed for root: rc = %d\n", err);
 497                 GOTO(out_lock_cn_cb, err);
 498         }
 499         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 500                                sbi->ll_md_exp, &lmd);
 501         if (err) {
 502                 CERROR("failed to understand root inode md: rc = %d\n", err);
 503                 ptlrpc_req_finished (request);
 504                 GOTO(out_lock_cn_cb, err);
 505         }
 506
 507         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 508         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
 509         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 510         ptlrpc_req_finished(request);
 511
 512         if (root == NULL || IS_ERR(root)) {
 513                 if (lmd.lsm)
 514                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 515 #ifdef CONFIG_FS_POSIX_ACL
 516                 if (lmd.posix_acl) {
 517                         posix_acl_release(lmd.posix_acl);
 518                         lmd.posix_acl = NULL;
 519                 }
 520 #endif
 521                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 522                 root = NULL;
 523                 CERROR("lustre_lite: bad iget4 for root\n");
 524                 GOTO(out_root, err);
 525         }
 526
 527         err = ll_close_thread_start(&sbi->ll_lcq);
 528         if (err) {
 529                 CERROR("cannot start close thread: rc %d\n", err);
 530                 GOTO(out_root, err);
 531         }
 532
 533 #ifdef CONFIG_FS_POSIX_ACL
 534         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 535                 rct_init(&sbi->ll_rct);
 536                 et_init(&sbi->ll_et);
 537         }
 538 #endif
 539
 540         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 541         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 542                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 543                                  NULL);
 544         cl_sb_init(sb);
 545
 546         sb->s_root = d_alloc_root(root);
 547 #ifdef HAVE_DCACHE_LOCK
 548         sb->s_root->d_op = &ll_d_root_ops;
 549 #else
 550         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 551         d_set_d_op(sb->s_root, &ll_d_root_ops);
 552         sb->s_d_op = &ll_d_ops;
 553 #endif
 554
 555         sbi->ll_sdev_orig = sb->s_dev;
 556
 557         /* We set sb->s_dev equal on all lustre clients in order to support
 558          * NFS export clustering.  NFSD requires that the FSID be the same
 559          * on all clients. */
 560         /* s_dev is also used in lt_compare() to compare two fs, but that is
 561          * only a node-local comparison. */
 562         uuid = obd_get_uuid(sbi->ll_md_exp);
 563         if (uuid != NULL)
 564                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 565
 566         if (data != NULL)
 567                 OBD_FREE_PTR(data);
 568         if (osfs != NULL)
 569                 OBD_FREE_PTR(osfs);
 570
 571         RETURN(err);
 572 out_root:
 573         if (root)
 574                 iput(root);
 575 out_lock_cn_cb:
 576         obd_fid_fini(sbi->ll_dt_exp);
 577 out_dt:
 578         obd_disconnect(sbi->ll_dt_exp);
 579         sbi->ll_dt_exp = NULL;
 580 out_md_fid:
 581         obd_fid_fini(sbi->ll_md_exp);
 582 out_md:
 583         obd_disconnect(sbi->ll_md_exp);
 584         sbi->ll_md_exp = NULL;
 585 out:
 586         if (data != NULL)
 587                 OBD_FREE_PTR(data);
 588         if (osfs != NULL)
 589                 OBD_FREE_PTR(osfs);
 590         lprocfs_unregister_mountpoint(sbi);
 591         return err;
 592 }
 593
 594 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 595 {
 596         int size, rc;
 597
 598         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 599         size = sizeof(int);
 600         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 601                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 602         if (rc)
 603                 CERROR("Get max mdsize error rc %d \n", rc);
 604
 605         RETURN(rc);
 606 }
 607
 608 void ll_dump_inode(struct inode *inode)
 609 {
 610         struct list_head *tmp;
 611         int dentry_count = 0;
 612
 613         LASSERT(inode != NULL);
 614
 615         list_for_each(tmp, &inode->i_dentry)
 616                 dentry_count++;
 617
 618         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 619                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 620                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 621 }
 622
 623 void lustre_dump_dentry(struct dentry *dentry, int recur)
 624 {
 625         struct list_head *tmp;
 626         int subdirs = 0;
 627
 628         LASSERT(dentry != NULL);
 629
 630         list_for_each(tmp, &dentry->d_subdirs)
 631                 subdirs++;
 632
 633         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 634                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 635                dentry->d_name.len, dentry->d_name.name,
 636                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 637                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 638                dentry->d_flags, dentry->d_fsdata, subdirs);
 639         if (dentry->d_inode != NULL)
 640                 ll_dump_inode(dentry->d_inode);
 641
 642         if (recur == 0)
 643                 return;
 644
 645         list_for_each(tmp, &dentry->d_subdirs) {
 646                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 647                 lustre_dump_dentry(d, recur - 1);
 648         }
 649 }
 650
 651 void client_common_put_super(struct super_block *sb)
 652 {
 653         struct ll_sb_info *sbi = ll_s2sbi(sb);
 654         ENTRY;
 655
 656 #ifdef CONFIG_FS_POSIX_ACL
 657         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 658                 et_fini(&sbi->ll_et);
 659                 rct_fini(&sbi->ll_rct);
 660         }
 661 #endif
 662
 663         obd_cancel_unused(sbi->ll_dt_exp, NULL, 0, NULL);
 664
 665         ll_close_thread_shutdown(sbi->ll_lcq);
 666
 667         cl_sb_fini(sb);
 668
 669         cfs_list_del(&sbi->ll_conn_chain);
 670
 671         obd_fid_fini(sbi->ll_dt_exp);
 672         obd_disconnect(sbi->ll_dt_exp);
 673         sbi->ll_dt_exp = NULL;
 674
 675         lprocfs_unregister_mountpoint(sbi);
 676
 677         obd_fid_fini(sbi->ll_md_exp);
 678         obd_disconnect(sbi->ll_md_exp);
 679         sbi->ll_md_exp = NULL;
 680
 681         EXIT;
 682 }
 683
 684 void ll_kill_super(struct super_block *sb)
 685 {
 686         struct ll_sb_info *sbi;
 687
 688         ENTRY;
 689
 690         /* not init sb ?*/
 691         if (!(sb->s_flags & MS_ACTIVE))
 692                 return;
 693
 694         sbi = ll_s2sbi(sb);
 695         /* we need restore s_dev from changed for clustred NFS before put_super
 696          * because new kernels have cached s_dev and change sb->s_dev in
 697          * put_super not affected real removing devices */
 698         if (sbi)
 699                 sb->s_dev = sbi->ll_sdev_orig;
 700         EXIT;
 701 }
 702
 703 char *ll_read_opt(const char *opt, char *data)
 704 {
 705         char *value;
 706         char *retval;
 707         ENTRY;
 708
 709         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 710         if (strncmp(opt, data, strlen(opt)))
 711                 RETURN(NULL);
 712         if ((value = strchr(data, '=')) == NULL)
 713                 RETURN(NULL);
 714
 715         value++;
 716         OBD_ALLOC(retval, strlen(value) + 1);
 717         if (!retval) {
 718                 CERROR("out of memory!\n");
 719                 RETURN(NULL);
 720         }
 721
 722         memcpy(retval, value, strlen(value)+1);
 723         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 724         RETURN(retval);
 725 }
 726
 727 static inline int ll_set_opt(const char *opt, char *data, int fl)
 728 {
 729         if (strncmp(opt, data, strlen(opt)) != 0)
 730                 return(0);
 731         else
 732                 return(fl);
 733 }
 734
 735 /* non-client-specific mount options are parsed in lmd_parse */
 736 static int ll_options(char *options, int *flags)
 737 {
 738         int tmp;
 739         char *s1 = options, *s2;
 740         ENTRY;
 741
 742         if (!options)
 743                 RETURN(0);
 744
 745         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 746
 747         while (*s1) {
 748                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 749                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 750                 if (tmp) {
 751                         *flags |= tmp;
 752                         goto next;
 753                 }
 754                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 755                 if (tmp) {
 756                         *flags |= tmp;
 757                         goto next;
 758                 }
 759                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 760                 if (tmp) {
 761                         *flags |= tmp;
 762                         goto next;
 763                 }
 764                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 765                 if (tmp) {
 766                         *flags &= ~tmp;
 767                         goto next;
 768                 }
 769                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 770                 if (tmp) {
 771                         *flags |= tmp;
 772                         goto next;
 773                 }
 774                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 775                 if (tmp) {
 776                         *flags &= ~tmp;
 777                         goto next;
 778                 }
 779 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 780                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 781                 if (tmp) {
 782                         /* Ignore deprecated mount option.  The client will
 783                          * always try to mount with ACL support, whether this
 784                          * is used depends on whether server supports it. */
 785                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 786                                                   "mount option 'acl'.\n");
 787                         goto next;
 788                 }
 789                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 790                 if (tmp) {
 791                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 792                                                   "mount option 'noacl'.\n");
 793                         goto next;
 794                 }
 795 #else
 796 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 797 #endif
 798                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 799                 if (tmp) {
 800                         *flags |= tmp;
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 804                 if (tmp) {
 805                         *flags |= tmp;
 806                         goto next;
 807                 }
 808                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 809                 if (tmp) {
 810                         *flags &= ~tmp;
 811                         goto next;
 812                 }
 813
 814                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 815                 if (tmp) {
 816                         *flags |= tmp;
 817                         goto next;
 818                 }
 819                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 820                 if (tmp) {
 821                         *flags &= ~tmp;
 822                         goto next;
 823                 }
 824                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 825                 if (tmp) {
 826                         *flags |= tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 830                 if (tmp) {
 831                         *flags &= ~tmp;
 832                         goto next;
 833                 }
 834                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 835                 if (tmp) {
 836                         *flags |= tmp;
 837                         goto next;
 838                 }
 839                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 840                 if (tmp) {
 841                         *flags &= ~tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 850                 if (tmp) {
 851                         *flags |= tmp;
 852                         goto next;
 853                 }
 854                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 860                 if (tmp) {
 861                         *flags &= ~tmp;
 862                         goto next;
 863                 }
 864                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 865                                    s1);
 866                 RETURN(-EINVAL);
 867
 868 next:
 869                 /* Find next opt */
 870                 s2 = strchr(s1, ',');
 871                 if (s2 == NULL)
 872                         break;
 873                 s1 = s2 + 1;
 874         }
 875         RETURN(0);
 876 }
 877
 878 void ll_lli_init(struct ll_inode_info *lli)
 879 {
 880         lli->lli_inode_magic = LLI_INODE_MAGIC;
 881         lli->lli_flags = 0;
 882         lli->lli_ioepoch = 0;
 883         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 884         cfs_spin_lock_init(&lli->lli_lock);
 885         lli->lli_posix_acl = NULL;
 886         lli->lli_remote_perms = NULL;
 887         cfs_mutex_init(&lli->lli_rmtperm_mutex);
 888         /* Do not set lli_fid, it has been initialized already. */
 889         fid_zero(&lli->lli_pfid);
 890         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 891         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 892         cfs_atomic_set(&lli->lli_open_count, 0);
 893         lli->lli_mds_capa = NULL;
 894         lli->lli_rmtperm_time = 0;
 895         lli->lli_pending_och = NULL;
 896         lli->lli_mds_read_och = NULL;
 897         lli->lli_mds_write_och = NULL;
 898         lli->lli_mds_exec_och = NULL;
 899         lli->lli_open_fd_read_count = 0;
 900         lli->lli_open_fd_write_count = 0;
 901         lli->lli_open_fd_exec_count = 0;
 902         cfs_mutex_init(&lli->lli_och_mutex);
 903         cfs_spin_lock_init(&lli->lli_agl_lock);
 904         lli->lli_has_smd = false;
 905         lli->lli_clob = NULL;
 906
 907         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 908         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 909                 cfs_mutex_init(&lli->lli_readdir_mutex);
 910                 lli->lli_opendir_key = NULL;
 911                 lli->lli_sai = NULL;
 912                 lli->lli_def_acl = NULL;
 913                 cfs_spin_lock_init(&lli->lli_sa_lock);
 914                 lli->lli_opendir_pid = 0;
 915         } else {
 916                 cfs_sema_init(&lli->lli_size_sem, 1);
 917                 lli->lli_size_sem_owner = NULL;
 918                 lli->lli_symlink_name = NULL;
 919                 cfs_init_rwsem(&lli->lli_trunc_sem);
 920                 cfs_mutex_init(&lli->lli_write_mutex);
 921                 cfs_init_rwsem(&lli->lli_glimpse_sem);
 922                 lli->lli_glimpse_time = 0;
 923                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 924                 lli->lli_agl_index = 0;
 925                 lli->lli_async_rc = 0;
 926         }
 927         cfs_mutex_init(&lli->lli_layout_mutex);
 928 }
 929
 930 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 931 {
 932 #ifdef HAVE_BDI_REGISTER
 933         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 934
 935 #ifdef HAVE_BDI_NAME
 936         bdi->name = "lustre";
 937 #endif
 938         return bdi_register(bdi, NULL, "lustre-%d",
 939                             atomic_inc_return(&ll_bdi_num));
 940 #else
 941         return 0;
 942 #endif
 943 }
 944
 945 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 946 {
 947         struct lustre_profile *lprof = NULL;
 948         struct lustre_sb_info *lsi = s2lsi(sb);
 949         struct ll_sb_info *sbi;
 950         char  *dt = NULL, *md = NULL;
 951         char  *profilenm = get_profile_name(sb);
 952         struct config_llog_instance *cfg;
 953         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 954         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 955         int    err;
 956         ENTRY;
 957
 958         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 959
 960         OBD_ALLOC_PTR(cfg);
 961         if (cfg == NULL)
 962                 RETURN(-ENOMEM);
 963
 964         cfs_module_get();
 965
 966         /* client additional sb info */
 967         lsi->lsi_llsbi = sbi = ll_init_sbi();
 968         if (!sbi) {
 969                 cfs_module_put(THIS_MODULE);
 970                 OBD_FREE_PTR(cfg);
 971                 RETURN(-ENOMEM);
 972         }
 973
 974         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 975         if (err)
 976                 GOTO(out_free, err);
 977
 978         err = ll_bdi_init(&lsi->lsi_bdi);
 979         if (err)
 980                 GOTO(out_free, err);
 981         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 982         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 983         err = ll_bdi_register(&lsi->lsi_bdi);
 984         if (err)
 985                 GOTO(out_free, err);
 986
 987 #ifdef HAVE_SB_BDI
 988         sb->s_bdi = &lsi->lsi_bdi;
 989 #endif
 990
 991         /* Generate a string unique to this super, in case some joker tries
 992            to mount the same fs at two mount points.
 993            Use the address of the super itself.*/
 994         cfg->cfg_instance = sb;
 995         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 996         cfg->cfg_callback = class_config_llog_handler;
 997         /* set up client obds */
 998         err = lustre_process_log(sb, profilenm, cfg);
 999         if (err < 0) {
1000                 CERROR("Unable to process log: %d\n", err);
1001                 GOTO(out_free, err);
1002         }
1003
1004         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1005         lprof = class_get_profile(profilenm);
1006         if (lprof == NULL) {
1007                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1008                                    " read from the MGS.  Does that filesystem "
1009                                    "exist?\n", profilenm);
1010                 GOTO(out_free, err = -EINVAL);
1011         }
1012         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1013                lprof->lp_md, lprof->lp_dt);
1014
1015         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1016         if (!dt)
1017                 GOTO(out_free, err = -ENOMEM);
1018         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1019
1020         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1021         if (!md)
1022                 GOTO(out_free, err = -ENOMEM);
1023         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1024
1025         /* connections, registrations, sb setup */
1026         err = client_common_fill_super(sb, md, dt, mnt);
1027
1028 out_free:
1029         if (md)
1030                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1031         if (dt)
1032                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1033         if (err)
1034                 ll_put_super(sb);
1035         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1036                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1037
1038         OBD_FREE_PTR(cfg);
1039         RETURN(err);
1040 } /* ll_fill_super */
1041
1042
1043 void lu_context_keys_dump(void);
1044
1045 void ll_put_super(struct super_block *sb)
1046 {
1047         struct config_llog_instance cfg;
1048         struct obd_device *obd;
1049         struct lustre_sb_info *lsi = s2lsi(sb);
1050         struct ll_sb_info *sbi = ll_s2sbi(sb);
1051         char *profilenm = get_profile_name(sb);
1052         int force = 1, next;
1053         ENTRY;
1054
1055         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1056
1057         ll_print_capa_stat(sbi);
1058
1059         cfg.cfg_instance = sb;
1060         lustre_end_log(sb, profilenm, &cfg);
1061
1062         if (sbi->ll_md_exp) {
1063                 obd = class_exp2obd(sbi->ll_md_exp);
1064                 if (obd)
1065                         force = obd->obd_force;
1066         }
1067
1068         /* We need to set force before the lov_disconnect in
1069            lustre_common_put_super, since l_d cleans up osc's as well. */
1070         if (force) {
1071                 next = 0;
1072                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1073                                                      &next)) != NULL) {
1074                         obd->obd_force = force;
1075                 }
1076         }
1077
1078         if (sbi->ll_lcq) {
1079                 /* Only if client_common_fill_super succeeded */
1080                 client_common_put_super(sb);
1081         }
1082
1083         next = 0;
1084         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1085                 class_manual_cleanup(obd);
1086         }
1087
1088         if (sbi->ll_flags & LL_SBI_VERBOSE)
1089                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1090
1091         if (profilenm)
1092                 class_del_profile(profilenm);
1093
1094         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1095                 ll_bdi_destroy(&lsi->lsi_bdi);
1096                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1097         }
1098
1099         ll_free_sbi(sb);
1100         lsi->lsi_llsbi = NULL;
1101
1102         lustre_common_put_super(sb);
1103
1104         cl_env_cache_purge(~0);
1105
1106         cfs_module_put(THIS_MODULE);
1107
1108         EXIT;
1109 } /* client_put_super */
1110
1111 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1112 {
1113         struct inode *inode = NULL;
1114         /* NOTE: we depend on atomic igrab() -bzzz */
1115         lock_res_and_lock(lock);
1116         if (lock->l_ast_data) {
1117                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1118                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1119                         inode = igrab(lock->l_ast_data);
1120                 } else {
1121                         inode = lock->l_ast_data;
1122                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1123                                          D_WARNING, lock, "l_ast_data %p is "
1124                                          "bogus: magic %08x", lock->l_ast_data,
1125                                          lli->lli_inode_magic);
1126                         inode = NULL;
1127                 }
1128         }
1129         unlock_res_and_lock(lock);
1130         return inode;
1131 }
1132
1133 static int null_if_equal(struct ldlm_lock *lock, void *data)
1134 {
1135         if (data == lock->l_ast_data) {
1136                 lock->l_ast_data = NULL;
1137
1138                 if (lock->l_req_mode != lock->l_granted_mode)
1139                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1140         }
1141
1142         return LDLM_ITER_CONTINUE;
1143 }
1144
1145 void ll_clear_inode(struct inode *inode)
1146 {
1147         struct ll_inode_info *lli = ll_i2info(inode);
1148         struct ll_sb_info *sbi = ll_i2sbi(inode);
1149         ENTRY;
1150
1151         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1152                inode->i_generation, inode);
1153
1154         if (S_ISDIR(inode->i_mode)) {
1155                 /* these should have been cleared in ll_file_release */
1156                 LASSERT(lli->lli_opendir_key == NULL);
1157                 LASSERT(lli->lli_sai == NULL);
1158                 LASSERT(lli->lli_opendir_pid == 0);
1159         }
1160
1161         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1162         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1163                          null_if_equal, inode);
1164
1165         LASSERT(!lli->lli_open_fd_write_count);
1166         LASSERT(!lli->lli_open_fd_read_count);
1167         LASSERT(!lli->lli_open_fd_exec_count);
1168
1169         if (lli->lli_mds_write_och)
1170                 ll_md_real_close(inode, FMODE_WRITE);
1171         if (lli->lli_mds_exec_och)
1172                 ll_md_real_close(inode, FMODE_EXEC);
1173         if (lli->lli_mds_read_och)
1174                 ll_md_real_close(inode, FMODE_READ);
1175
1176         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1177                 OBD_FREE(lli->lli_symlink_name,
1178                          strlen(lli->lli_symlink_name) + 1);
1179                 lli->lli_symlink_name = NULL;
1180         }
1181
1182         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1183                 LASSERT(lli->lli_posix_acl == NULL);
1184                 if (lli->lli_remote_perms) {
1185                         free_rmtperm_hash(lli->lli_remote_perms);
1186                         lli->lli_remote_perms = NULL;
1187                 }
1188         }
1189 #ifdef CONFIG_FS_POSIX_ACL
1190         else if (lli->lli_posix_acl) {
1191                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1192                 LASSERT(lli->lli_remote_perms == NULL);
1193                 posix_acl_release(lli->lli_posix_acl);
1194                 lli->lli_posix_acl = NULL;
1195         }
1196 #endif
1197         lli->lli_inode_magic = LLI_INODE_DEAD;
1198
1199         ll_clear_inode_capas(inode);
1200         if (!S_ISDIR(inode->i_mode))
1201                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1202
1203         /*
1204          * XXX This has to be done before lsm is freed below, because
1205          * cl_object still uses inode lsm.
1206          */
1207         cl_inode_fini(inode);
1208         lli->lli_has_smd = false;
1209
1210         EXIT;
1211 }
1212
1213 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1214                   struct md_open_data **mod)
1215 {
1216         struct lustre_md md;
1217         struct inode *inode = dentry->d_inode;
1218         struct ll_sb_info *sbi = ll_i2sbi(inode);
1219         struct ptlrpc_request *request = NULL;
1220         int rc, ia_valid;
1221         ENTRY;
1222
1223         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1224                                      LUSTRE_OPC_ANY, NULL);
1225         if (IS_ERR(op_data))
1226                 RETURN(PTR_ERR(op_data));
1227
1228         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1229                         &request, mod);
1230         if (rc) {
1231                 ptlrpc_req_finished(request);
1232                 if (rc == -ENOENT) {
1233                         inode->i_nlink = 0;
1234                         /* Unlinked special device node? Or just a race?
1235                          * Pretend we done everything. */
1236                         if (!S_ISREG(inode->i_mode) &&
1237                             !S_ISDIR(inode->i_mode)) {
1238                                 ia_valid = op_data->op_attr.ia_valid;
1239                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1240                                 rc = simple_setattr(dentry, &op_data->op_attr);
1241                                 op_data->op_attr.ia_valid = ia_valid;
1242                         }
1243                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1244                         CERROR("md_setattr fails: rc = %d\n", rc);
1245                 }
1246                 RETURN(rc);
1247         }
1248
1249         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1250                               sbi->ll_md_exp, &md);
1251         if (rc) {
1252                 ptlrpc_req_finished(request);
1253                 RETURN(rc);
1254         }
1255
1256         /* We want to adjust timestamps.
1257          * If there is at least some data in file, we cleared ATTR_SIZE
1258          * to avoid update size, otherwise it is important to do.(SOM case)
1259          * (bug 6196) */
1260         ia_valid = op_data->op_attr.ia_valid;
1261         /* Since we set ATTR_*_SET flags above, and already done permission
1262          * check, So don't let inode_change_ok() check it again.  */
1263         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1264         rc = simple_setattr(dentry, &op_data->op_attr);
1265         op_data->op_attr.ia_valid = ia_valid;
1266
1267         /* Extract epoch data if obtained. */
1268         op_data->op_handle = md.body->handle;
1269         op_data->op_ioepoch = md.body->ioepoch;
1270
1271         ll_update_inode(inode, &md);
1272         ptlrpc_req_finished(request);
1273
1274         RETURN(rc);
1275 }
1276
1277 /* Close IO epoch and send Size-on-MDS attribute update. */
1278 static int ll_setattr_done_writing(struct inode *inode,
1279                                    struct md_op_data *op_data,
1280                                    struct md_open_data *mod)
1281 {
1282         struct ll_inode_info *lli = ll_i2info(inode);
1283         int rc = 0;
1284         ENTRY;
1285
1286         LASSERT(op_data != NULL);
1287         if (!S_ISREG(inode->i_mode))
1288                 RETURN(0);
1289
1290         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1291                op_data->op_ioepoch, PFID(&lli->lli_fid));
1292
1293         op_data->op_flags = MF_EPOCH_CLOSE;
1294         ll_done_writing_attr(inode, op_data);
1295         ll_pack_inode2opdata(inode, op_data, NULL);
1296
1297         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1298         if (rc == -EAGAIN) {
1299                 /* MDS has instructed us to obtain Size-on-MDS attribute
1300                  * from OSTs and send setattr to back to MDS. */
1301                 rc = ll_som_update(inode, op_data);
1302         } else if (rc) {
1303                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1304                        inode->i_ino, rc);
1305         }
1306         RETURN(rc);
1307 }
1308
1309 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1310 {
1311         struct obd_capa *capa;
1312         int rc;
1313
1314         if (attr->ia_valid & ATTR_SIZE)
1315                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1316         else
1317                 capa = ll_mdscapa_get(inode);
1318
1319         rc = cl_setattr_ost(inode, attr, capa);
1320
1321         if (attr->ia_valid & ATTR_SIZE)
1322                 ll_truncate_free_capa(capa);
1323         else
1324                 capa_put(capa);
1325
1326         return rc;
1327 }
1328
1329 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1330 /**
1331  * inode_newsize_ok - may this inode be truncated to a given size
1332  * @inode:      the inode to be truncated
1333  * @offset:     the new size to assign to the inode
1334  * @Returns:    0 on success, -ve errno on failure
1335  *
1336  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1337  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1338  * when necessary. Caller must not proceed with inode size change if failure is
1339  * returned. @inode must be a file (not directory), with appropriate
1340  * permissions to allow truncate (inode_newsize_ok does NOT check these
1341  * conditions).
1342  *
1343  * inode_newsize_ok must be called with i_mutex held.
1344  */
1345 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1346 {
1347         if (inode->i_size < offset) {
1348                 unsigned long limit;
1349
1350                 limit = rlimit(RLIMIT_FSIZE);
1351                 if (limit != RLIM_INFINITY && offset > limit)
1352                         goto out_sig;
1353                 if (offset > inode->i_sb->s_maxbytes)
1354                         goto out_big;
1355         } else {
1356                 /*
1357                  * truncation of in-use swapfiles is disallowed - it would
1358                  * cause subsequent swapout to scribble on the now-freed
1359                  * blocks.
1360                  */
1361                 if (IS_SWAPFILE(inode))
1362                         return -ETXTBSY;
1363         }
1364
1365         return 0;
1366 out_sig:
1367         send_sig(SIGXFSZ, current, 0);
1368 out_big:
1369         return -EFBIG;
1370 }
1371 #endif
1372
1373 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1374  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1375  * keep these values until such a time that objects are allocated for it.
1376  * We do the MDS operations first, as it is checking permissions for us.
1377  * We don't to the MDS RPC if there is nothing that we want to store there,
1378  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1379  * going to do an RPC anyways.
1380  *
1381  * If we are doing a truncate, we will send the mtime and ctime updates
1382  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1383  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1384  * at the same time.
1385  */
1386 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1387 {
1388         struct lov_stripe_md *lsm;
1389         struct inode *inode = dentry->d_inode;
1390         struct ll_inode_info *lli = ll_i2info(inode);
1391         struct md_op_data *op_data = NULL;
1392         struct md_open_data *mod = NULL;
1393         int ia_valid = attr->ia_valid;
1394         int rc = 0, rc1 = 0;
1395         ENTRY;
1396
1397         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
1398                attr->ia_valid);
1399
1400         if (ia_valid & ATTR_SIZE) {
1401                 /* Check new size against VFS/VM file size limit and rlimit */
1402                 rc = inode_newsize_ok(inode, attr->ia_size);
1403                 if (rc)
1404                         RETURN(rc);
1405
1406                 /* The maximum Lustre file size is variable, based on the
1407                  * OST maximum object size and number of stripes.  This
1408                  * needs another check in addition to the VFS check above. */
1409                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1410                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1411                                PFID(&lli->lli_fid), attr->ia_size,
1412                                ll_file_maxbytes(inode));
1413                         RETURN(-EFBIG);
1414                 }
1415
1416                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1417         }
1418
1419         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1420         if (ia_valid & TIMES_SET_FLAGS) {
1421                 if (cfs_curproc_fsuid() != inode->i_uid &&
1422                     !cfs_capable(CFS_CAP_FOWNER))
1423                         RETURN(-EPERM);
1424         }
1425
1426         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1427         if (attr->ia_valid & ATTR_CTIME) {
1428                 attr->ia_ctime = CFS_CURRENT_TIME;
1429                 attr->ia_valid |= ATTR_CTIME_SET;
1430         }
1431         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1432                 attr->ia_atime = CFS_CURRENT_TIME;
1433                 attr->ia_valid |= ATTR_ATIME_SET;
1434         }
1435         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1436                 attr->ia_mtime = CFS_CURRENT_TIME;
1437                 attr->ia_valid |= ATTR_MTIME_SET;
1438         }
1439
1440         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1441                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1442                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1443                        cfs_time_current_sec());
1444
1445         /* We always do an MDS RPC, even if we're only changing the size;
1446          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1447
1448         OBD_ALLOC_PTR(op_data);
1449         if (op_data == NULL)
1450                 RETURN(-ENOMEM);
1451
1452         if (!S_ISDIR(inode->i_mode)) {
1453                 if (ia_valid & ATTR_SIZE)
1454                         UP_WRITE_I_ALLOC_SEM(inode);
1455                 mutex_unlock(&inode->i_mutex);
1456                 cfs_down_write(&lli->lli_trunc_sem);
1457                 mutex_lock(&inode->i_mutex);
1458                 if (ia_valid & ATTR_SIZE)
1459                         DOWN_WRITE_I_ALLOC_SEM(inode);
1460         }
1461
1462         /* We need a steady stripe configuration for setattr to avoid
1463          * confusion. */
1464         lsm = ccc_inode_lsm_get(inode);
1465
1466         /* NB: ATTR_SIZE will only be set after this point if the size
1467          * resides on the MDS, ie, this file has no objects. */
1468         if (lsm != NULL)
1469                 attr->ia_valid &= ~ATTR_SIZE;
1470
1471         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1472
1473         /* Open epoch for truncate. */
1474         if (exp_connect_som(ll_i2mdexp(inode)) &&
1475             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1476                 op_data->op_flags = MF_EPOCH_OPEN;
1477
1478         rc = ll_md_setattr(dentry, op_data, &mod);
1479         if (rc)
1480                 GOTO(out, rc);
1481
1482         ll_ioepoch_open(lli, op_data->op_ioepoch);
1483         if (lsm == NULL || !S_ISREG(inode->i_mode)) {
1484                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
1485                 GOTO(out, rc = 0);
1486         }
1487
1488         if (ia_valid & ATTR_SIZE)
1489                 attr->ia_valid |= ATTR_SIZE;
1490         if (ia_valid & (ATTR_SIZE |
1491                         ATTR_ATIME | ATTR_ATIME_SET |
1492                         ATTR_MTIME | ATTR_MTIME_SET))
1493                 /* For truncate and utimes sending attributes to OSTs, setting
1494                  * mtime/atime to the past will be performed under PW [0:EOF]
1495                  * extent lock (new_size:EOF for truncate).  It may seem
1496                  * excessive to send mtime/atime updates to OSTs when not
1497                  * setting times to past, but it is necessary due to possible
1498                  * time de-synchronization between MDT inode and OST objects */
1499                 rc = ll_setattr_ost(inode, attr);
1500         EXIT;
1501 out:
1502         ccc_inode_lsm_put(inode, lsm);
1503         if (op_data) {
1504                 if (op_data->op_ioepoch) {
1505                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1506                         if (!rc)
1507                                 rc = rc1;
1508                 }
1509                 ll_finish_md_op_data(op_data);
1510         }
1511         if (!S_ISDIR(inode->i_mode))
1512                 cfs_up_write(&lli->lli_trunc_sem);
1513
1514         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1515                            LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1516
1517         return rc;
1518 }
1519
1520 int ll_setattr(struct dentry *de, struct iattr *attr)
1521 {
1522         int mode = de->d_inode->i_mode;
1523
1524         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1525                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1526                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1527
1528         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1529                                (ATTR_SIZE|ATTR_MODE)) &&
1530             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1531              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1532               !(attr->ia_mode & S_ISGID))))
1533                 attr->ia_valid |= ATTR_FORCE;
1534
1535         if ((mode & S_ISUID) &&
1536             !(attr->ia_mode & S_ISUID) &&
1537             !(attr->ia_valid & ATTR_KILL_SUID))
1538                 attr->ia_valid |= ATTR_KILL_SUID;
1539
1540         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1541             !(attr->ia_mode & S_ISGID) &&
1542             !(attr->ia_valid & ATTR_KILL_SGID))
1543                 attr->ia_valid |= ATTR_KILL_SGID;
1544
1545         return ll_setattr_raw(de, attr);
1546 }
1547
1548 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1549                        __u64 max_age, __u32 flags)
1550 {
1551         struct ll_sb_info *sbi = ll_s2sbi(sb);
1552         struct obd_statfs obd_osfs;
1553         int rc;
1554         ENTRY;
1555
1556         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1557         if (rc) {
1558                 CERROR("md_statfs fails: rc = %d\n", rc);
1559                 RETURN(rc);
1560         }
1561
1562         osfs->os_type = sb->s_magic;
1563
1564         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1565                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1566
1567         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1568                 flags |= OBD_STATFS_NODELAY;
1569
1570         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1571         if (rc) {
1572                 CERROR("obd_statfs fails: rc = %d\n", rc);
1573                 RETURN(rc);
1574         }
1575
1576         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1577                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1578                obd_osfs.os_files);
1579
1580         osfs->os_bsize = obd_osfs.os_bsize;
1581         osfs->os_blocks = obd_osfs.os_blocks;
1582         osfs->os_bfree = obd_osfs.os_bfree;
1583         osfs->os_bavail = obd_osfs.os_bavail;
1584
1585         /* If we don't have as many objects free on the OST as inodes
1586          * on the MDS, we reduce the total number of inodes to
1587          * compensate, so that the "inodes in use" number is correct.
1588          */
1589         if (obd_osfs.os_ffree < osfs->os_ffree) {
1590                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1591                         obd_osfs.os_ffree;
1592                 osfs->os_ffree = obd_osfs.os_ffree;
1593         }
1594
1595         RETURN(rc);
1596 }
1597 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1598 {
1599         struct super_block *sb = de->d_sb;
1600         struct obd_statfs osfs;
1601         int rc;
1602
1603         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1604         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1605
1606         /* Some amount of caching on the client is allowed */
1607         rc = ll_statfs_internal(sb, &osfs,
1608                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1609                                 0);
1610         if (rc)
1611                 return rc;
1612
1613         statfs_unpack(sfs, &osfs);
1614
1615         /* We need to downshift for all 32-bit kernels, because we can't
1616          * tell if the kernel is being called via sys_statfs64() or not.
1617          * Stop before overflowing f_bsize - in which case it is better
1618          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1619         if (sizeof(long) < 8) {
1620                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1621                         sfs->f_bsize <<= 1;
1622
1623                         osfs.os_blocks >>= 1;
1624                         osfs.os_bfree >>= 1;
1625                         osfs.os_bavail >>= 1;
1626                 }
1627         }
1628
1629         sfs->f_blocks = osfs.os_blocks;
1630         sfs->f_bfree = osfs.os_bfree;
1631         sfs->f_bavail = osfs.os_bavail;
1632
1633         return 0;
1634 }
1635
1636 void ll_inode_size_lock(struct inode *inode)
1637 {
1638         struct ll_inode_info *lli;
1639
1640         LASSERT(!S_ISDIR(inode->i_mode));
1641
1642         lli = ll_i2info(inode);
1643         LASSERT(lli->lli_size_sem_owner != current);
1644         cfs_down(&lli->lli_size_sem);
1645         LASSERT(lli->lli_size_sem_owner == NULL);
1646         lli->lli_size_sem_owner = current;
1647 }
1648
1649 void ll_inode_size_unlock(struct inode *inode)
1650 {
1651         struct ll_inode_info *lli;
1652
1653         lli = ll_i2info(inode);
1654         LASSERT(lli->lli_size_sem_owner == current);
1655         lli->lli_size_sem_owner = NULL;
1656         cfs_up(&lli->lli_size_sem);
1657 }
1658
1659 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1660 {
1661         struct ll_inode_info *lli = ll_i2info(inode);
1662         struct mdt_body *body = md->body;
1663         struct lov_stripe_md *lsm = md->lsm;
1664         struct ll_sb_info *sbi = ll_i2sbi(inode);
1665
1666         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1667         if (lsm != NULL) {
1668                 LASSERT(S_ISREG(inode->i_mode));
1669                 cfs_mutex_lock(&lli->lli_och_mutex);
1670                 CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1671                                 lsm, inode->i_ino, inode->i_generation, inode);
1672                 /* cl_file_inode_init must go before lli_has_smd or a race
1673                  * is possible where client thinks the file has stripes,
1674                  * but lov raid0 is not setup yet and parallel e.g.
1675                  * glimpse would try to use uninitialized lov */
1676                 if (cl_file_inode_init(inode, md) == 0)
1677                         lli->lli_has_smd = true;
1678                 cfs_mutex_unlock(&lli->lli_och_mutex);
1679
1680                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1681                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1682                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1683                 if (md->lsm != NULL)
1684                         obd_free_memmd(ll_i2dtexp(inode), &md->lsm);
1685         }
1686
1687         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1688                 if (body->valid & OBD_MD_FLRMTPERM)
1689                         ll_update_remote_perm(inode, md->remote_perm);
1690         }
1691 #ifdef CONFIG_FS_POSIX_ACL
1692         else if (body->valid & OBD_MD_FLACL) {
1693                 cfs_spin_lock(&lli->lli_lock);
1694                 if (lli->lli_posix_acl)
1695                         posix_acl_release(lli->lli_posix_acl);
1696                 lli->lli_posix_acl = md->posix_acl;
1697                 cfs_spin_unlock(&lli->lli_lock);
1698         }
1699 #endif
1700         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1701         inode->i_generation = cl_fid_build_gen(&body->fid1);
1702
1703         if (body->valid & OBD_MD_FLATIME) {
1704                 if (body->atime > LTIME_S(inode->i_atime))
1705                         LTIME_S(inode->i_atime) = body->atime;
1706                 lli->lli_lvb.lvb_atime = body->atime;
1707         }
1708         if (body->valid & OBD_MD_FLMTIME) {
1709                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1710                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1711                                "to "LPU64"\n", inode->i_ino,
1712                                LTIME_S(inode->i_mtime), body->mtime);
1713                         LTIME_S(inode->i_mtime) = body->mtime;
1714                 }
1715                 lli->lli_lvb.lvb_mtime = body->mtime;
1716         }
1717         if (body->valid & OBD_MD_FLCTIME) {
1718                 if (body->ctime > LTIME_S(inode->i_ctime))
1719                         LTIME_S(inode->i_ctime) = body->ctime;
1720                 lli->lli_lvb.lvb_ctime = body->ctime;
1721         }
1722         if (body->valid & OBD_MD_FLMODE)
1723                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1724         if (body->valid & OBD_MD_FLTYPE)
1725                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1726         LASSERT(inode->i_mode != 0);
1727         if (S_ISREG(inode->i_mode)) {
1728                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1729         } else {
1730                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1731         }
1732         if (body->valid & OBD_MD_FLUID)
1733                 inode->i_uid = body->uid;
1734         if (body->valid & OBD_MD_FLGID)
1735                 inode->i_gid = body->gid;
1736         if (body->valid & OBD_MD_FLFLAGS)
1737                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1738         if (body->valid & OBD_MD_FLNLINK)
1739                 inode->i_nlink = body->nlink;
1740         if (body->valid & OBD_MD_FLRDEV)
1741                 inode->i_rdev = old_decode_dev(body->rdev);
1742
1743         if (body->valid & OBD_MD_FLID) {
1744                 /* FID shouldn't be changed! */
1745                 if (fid_is_sane(&lli->lli_fid)) {
1746                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1747                                  "Trying to change FID "DFID
1748                                  " to the "DFID", inode %lu/%u(%p)\n",
1749                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1750                                  inode->i_ino, inode->i_generation, inode);
1751                 } else
1752                         lli->lli_fid = body->fid1;
1753         }
1754
1755         LASSERT(fid_seq(&lli->lli_fid) != 0);
1756
1757         if (body->valid & OBD_MD_FLSIZE) {
1758                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1759                     S_ISREG(inode->i_mode) && lli->lli_has_smd) {
1760                         struct lustre_handle lockh;
1761                         ldlm_mode_t mode;
1762
1763                         /* As it is possible a blocking ast has been processed
1764                          * by this time, we need to check there is an UPDATE
1765                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1766                          * it. */
1767                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1768                                                &lockh);
1769                         if (mode) {
1770                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1771                                                       LLIF_EPOCH_PENDING |
1772                                                       LLIF_SOM_DIRTY)) {
1773                                         CERROR("ino %lu flags %u still has "
1774                                                "size authority! do not trust "
1775                                                "the size got from MDS\n",
1776                                                inode->i_ino, lli->lli_flags);
1777                                 } else {
1778                                         /* Use old size assignment to avoid
1779                                          * deadlock bz14138 & bz14326 */
1780                                         i_size_write(inode, body->size);
1781                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1782                                 }
1783                                 ldlm_lock_decref(&lockh, mode);
1784                         }
1785                 } else {
1786                         /* Use old size assignment to avoid
1787                          * deadlock bz14138 & bz14326 */
1788                         i_size_write(inode, body->size);
1789
1790                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1791                                inode->i_ino, (unsigned long long)body->size);
1792                 }
1793
1794                 if (body->valid & OBD_MD_FLBLOCKS)
1795                         inode->i_blocks = body->blocks;
1796         }
1797
1798         if (body->valid & OBD_MD_FLMDSCAPA) {
1799                 LASSERT(md->mds_capa);
1800                 ll_add_capa(inode, md->mds_capa);
1801         }
1802         if (body->valid & OBD_MD_FLOSSCAPA) {
1803                 LASSERT(md->oss_capa);
1804                 ll_add_capa(inode, md->oss_capa);
1805         }
1806 }
1807
1808 void ll_read_inode2(struct inode *inode, void *opaque)
1809 {
1810         struct lustre_md *md = opaque;
1811         struct ll_inode_info *lli = ll_i2info(inode);
1812         ENTRY;
1813
1814         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1815                PFID(&lli->lli_fid), inode);
1816
1817         LASSERT(!lli->lli_has_smd);
1818
1819         /* Core attributes from the MDS first.  This is a new inode, and
1820          * the VFS doesn't zero times in the core inode so we have to do
1821          * it ourselves.  They will be overwritten by either MDS or OST
1822          * attributes - we just need to make sure they aren't newer. */
1823         LTIME_S(inode->i_mtime) = 0;
1824         LTIME_S(inode->i_atime) = 0;
1825         LTIME_S(inode->i_ctime) = 0;
1826         inode->i_rdev = 0;
1827         ll_update_inode(inode, md);
1828
1829         /* OIDEBUG(inode); */
1830
1831         /* initializing backing dev info. */
1832         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1833
1834
1835         if (S_ISREG(inode->i_mode)) {
1836                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1837                 inode->i_op = &ll_file_inode_operations;
1838                 inode->i_fop = sbi->ll_fop;
1839                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1840                 EXIT;
1841         } else if (S_ISDIR(inode->i_mode)) {
1842                 inode->i_op = &ll_dir_inode_operations;
1843                 inode->i_fop = &ll_dir_operations;
1844                 EXIT;
1845         } else if (S_ISLNK(inode->i_mode)) {
1846                 inode->i_op = &ll_fast_symlink_inode_operations;
1847                 EXIT;
1848         } else {
1849                 inode->i_op = &ll_special_inode_operations;
1850
1851                 init_special_inode(inode, inode->i_mode,
1852                                    kdev_t_to_nr(inode->i_rdev));
1853
1854                 EXIT;
1855         }
1856 }
1857
1858 void ll_delete_inode(struct inode *inode)
1859 {
1860         struct cl_inode_info *lli = cl_i2info(inode);
1861         struct ll_sb_info    *sbi = ll_i2sbi(inode);
1862         int rc;
1863         ENTRY;
1864
1865         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1866         if (rc)
1867                 CERROR("fid_delete() failed, rc %d\n", rc);
1868
1869         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1870                 /* discard all dirty pages before truncating them, required by
1871                  * osc_extent implementation at LU-1030. */
1872                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1873
1874         truncate_inode_pages(&inode->i_data, 0);
1875
1876         /* Workaround for LU-118 */
1877         if (inode->i_data.nrpages) {
1878                 TREE_READ_LOCK_IRQ(&inode->i_data);
1879                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1880                 LASSERTF(inode->i_data.nrpages == 0,
1881                          "inode=%lu/%u(%p) nrpages=%lu, see "
1882                          "http://jira.whamcloud.com/browse/LU-118\n",
1883                          inode->i_ino, inode->i_generation, inode,
1884                          inode->i_data.nrpages);
1885         }
1886         /* Workaround end */
1887
1888 #ifdef HAVE_SBOPS_EVICT_INODE
1889         ll_clear_inode(inode);
1890         end_writeback(inode);
1891 #else
1892         clear_inode(inode);
1893 #endif
1894
1895         EXIT;
1896 }
1897
1898 int ll_iocontrol(struct inode *inode, struct file *file,
1899                  unsigned int cmd, unsigned long arg)
1900 {
1901         struct ll_sb_info *sbi = ll_i2sbi(inode);
1902         struct ptlrpc_request *req = NULL;
1903         int rc, flags = 0;
1904         ENTRY;
1905
1906         switch(cmd) {
1907         case FSFILT_IOC_GETFLAGS: {
1908                 struct mdt_body *body;
1909                 struct md_op_data *op_data;
1910
1911                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1912                                              0, 0, LUSTRE_OPC_ANY,
1913                                              NULL);
1914                 if (IS_ERR(op_data))
1915                         RETURN(PTR_ERR(op_data));
1916
1917                 op_data->op_valid = OBD_MD_FLFLAGS;
1918                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1919                 ll_finish_md_op_data(op_data);
1920                 if (rc) {
1921                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1922                         RETURN(-abs(rc));
1923                 }
1924
1925                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1926
1927                 flags = body->flags;
1928
1929                 ptlrpc_req_finished(req);
1930
1931                 RETURN(put_user(flags, (int *)arg));
1932         }
1933         case FSFILT_IOC_SETFLAGS: {
1934                 struct lov_stripe_md *lsm;
1935                 struct obd_info oinfo = { { { 0 } } };
1936                 struct md_op_data *op_data;
1937
1938                 if (get_user(flags, (int *)arg))
1939                         RETURN(-EFAULT);
1940
1941                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1942                                              LUSTRE_OPC_ANY, NULL);
1943                 if (IS_ERR(op_data))
1944                         RETURN(PTR_ERR(op_data));
1945
1946                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1947                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1948                 rc = md_setattr(sbi->ll_md_exp, op_data,
1949                                 NULL, 0, NULL, 0, &req, NULL);
1950                 ll_finish_md_op_data(op_data);
1951                 ptlrpc_req_finished(req);
1952                 if (rc)
1953                         RETURN(rc);
1954
1955                 OBDO_ALLOC(oinfo.oi_oa);
1956                 if (!oinfo.oi_oa)
1957                         RETURN(-ENOMEM);
1958
1959                 lsm = ccc_inode_lsm_get(inode);
1960                 if (lsm == NULL) {
1961                         inode->i_flags = ll_ext_to_inode_flags(flags);
1962                         OBDO_FREE(oinfo.oi_oa);
1963                         RETURN(0);
1964                 }
1965
1966                 oinfo.oi_md = lsm;
1967                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1968                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1969                 oinfo.oi_oa->o_flags = flags;
1970                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1971                                        OBD_MD_FLGROUP;
1972                 oinfo.oi_capa = ll_mdscapa_get(inode);
1973                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1974                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1975                 capa_put(oinfo.oi_capa);
1976                 OBDO_FREE(oinfo.oi_oa);
1977                 ccc_inode_lsm_put(inode, lsm);
1978
1979                 if (rc && rc != -EPERM && rc != -EACCES)
1980                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1981
1982                 RETURN(rc);
1983         }
1984         default:
1985                 RETURN(-ENOSYS);
1986         }
1987
1988         RETURN(0);
1989 }
1990
1991 int ll_flush_ctx(struct inode *inode)
1992 {
1993         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1994
1995         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
1996
1997         obd_set_info_async(NULL, sbi->ll_md_exp,
1998                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1999                            0, NULL, NULL);
2000         obd_set_info_async(NULL, sbi->ll_dt_exp,
2001                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2002                            0, NULL, NULL);
2003         return 0;
2004 }
2005
2006 /* umount -f client means force down, don't save state */
2007 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2008 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2009 {
2010         struct super_block *sb = vfsmnt->mnt_sb;
2011 #else
2012 void ll_umount_begin(struct super_block *sb)
2013 {
2014 #endif
2015         struct ll_sb_info *sbi = ll_s2sbi(sb);
2016         struct obd_device *obd;
2017         struct obd_ioctl_data *ioc_data;
2018         ENTRY;
2019
2020 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2021         if (!(flags & MNT_FORCE)) {
2022                 EXIT;
2023                 return;
2024         }
2025 #endif
2026
2027         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2028                sb->s_count, atomic_read(&sb->s_active));
2029
2030         obd = class_exp2obd(sbi->ll_md_exp);
2031         if (obd == NULL) {
2032                 CERROR("Invalid MDC connection handle "LPX64"\n",
2033                        sbi->ll_md_exp->exp_handle.h_cookie);
2034                 EXIT;
2035                 return;
2036         }
2037         obd->obd_force = 1;
2038
2039         obd = class_exp2obd(sbi->ll_dt_exp);
2040         if (obd == NULL) {
2041                 CERROR("Invalid LOV connection handle "LPX64"\n",
2042                        sbi->ll_dt_exp->exp_handle.h_cookie);
2043                 EXIT;
2044                 return;
2045         }
2046         obd->obd_force = 1;
2047
2048         OBD_ALLOC_PTR(ioc_data);
2049         if (ioc_data) {
2050                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2051                               sizeof ioc_data, ioc_data, NULL);
2052
2053                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2054                               sizeof ioc_data, ioc_data, NULL);
2055
2056                 OBD_FREE_PTR(ioc_data);
2057         }
2058
2059
2060         /* Really, we'd like to wait until there are no requests outstanding,
2061          * and then continue.  For now, we just invalidate the requests,
2062          * schedule() and sleep one second if needed, and hope.
2063          */
2064         cfs_schedule();
2065 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2066         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2067                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2068                                                    cfs_time_seconds(1));
2069                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2070                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2071                                       "may try to umount it a bit later\n",
2072                                       atomic_read(&vfsmnt->mnt_count));
2073         }
2074 #endif
2075
2076         EXIT;
2077 }
2078
2079 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2080 {
2081         struct ll_sb_info *sbi = ll_s2sbi(sb);
2082         char *profilenm = get_profile_name(sb);
2083         int err;
2084         __u32 read_only;
2085
2086         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2087                 read_only = *flags & MS_RDONLY;
2088                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2089                                          sizeof(KEY_READ_ONLY),
2090                                          KEY_READ_ONLY, sizeof(read_only),
2091                                          &read_only, NULL);
2092                 if (err) {
2093                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2094                                       profilenm, read_only ?
2095                                       "read-only" : "read-write", err);
2096                         return err;
2097                 }
2098
2099                 if (read_only)
2100                         sb->s_flags |= MS_RDONLY;
2101                 else
2102                         sb->s_flags &= ~MS_RDONLY;
2103
2104                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2105                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2106                                       read_only ?  "read-only" : "read-write");
2107         }
2108         return 0;
2109 }
2110
2111 int ll_prep_inode(struct inode **inode,
2112                   struct ptlrpc_request *req,
2113                   struct super_block *sb)
2114 {
2115         struct ll_sb_info *sbi = NULL;
2116         struct lustre_md md;
2117         __u64 ibits;
2118         int rc;
2119         ENTRY;
2120
2121         LASSERT(*inode || sb);
2122         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2123         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2124                               sbi->ll_md_exp, &md);
2125         if (rc)
2126                 RETURN(rc);
2127
2128         if (*inode) {
2129                 ll_update_inode(*inode, &md);
2130         } else {
2131                 LASSERT(sb != NULL);
2132
2133                 /*
2134                  * At this point server returns to client's same fid as client
2135                  * generated for creating. So using ->fid1 is okay here.
2136                  */
2137                 LASSERT(fid_is_sane(&md.body->fid1));
2138
2139                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2140                 if (*inode == NULL || IS_ERR(*inode)) {
2141                         if (md.lsm)
2142                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2143 #ifdef CONFIG_FS_POSIX_ACL
2144                         if (md.posix_acl) {
2145                                 posix_acl_release(md.posix_acl);
2146                                 md.posix_acl = NULL;
2147                         }
2148 #endif
2149                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2150                         *inode = NULL;
2151                         CERROR("new_inode -fatal: rc %d\n", rc);
2152                         GOTO(out, rc);
2153                 }
2154         }
2155
2156         /* sanity check for LAYOUT lock. */
2157         ibits = MDS_INODELOCK_LAYOUT;
2158         if (S_ISREG(md.body->mode) && sbi->ll_flags & LL_SBI_LAYOUT_LOCK &&
2159             md.lsm != NULL && !ll_have_md_lock(*inode, &ibits, LCK_MINMODE)) {
2160                 char *fsname = ll_get_fsname(*inode);
2161                 CERROR("%s: inode "DFID" (%p) layout lock not granted.\n",
2162                         fsname, PFID(ll_inode2fid(*inode)),
2163                         *inode);
2164                 if (fsname)
2165                         OBD_FREE(fsname, MGS_PARAM_MAXLEN);
2166         }
2167
2168 out:
2169         md_free_lustre_md(sbi->ll_md_exp, &md);
2170         RETURN(rc);
2171 }
2172
2173 int ll_obd_statfs(struct inode *inode, void *arg)
2174 {
2175         struct ll_sb_info *sbi = NULL;
2176         struct obd_export *exp;
2177         char *buf = NULL;
2178         struct obd_ioctl_data *data = NULL;
2179         __u32 type;
2180         __u32 flags;
2181         int len = 0, rc;
2182
2183         if (!inode || !(sbi = ll_i2sbi(inode)))
2184                 GOTO(out_statfs, rc = -EINVAL);
2185
2186         rc = obd_ioctl_getdata(&buf, &len, arg);
2187         if (rc)
2188                 GOTO(out_statfs, rc);
2189
2190         data = (void*)buf;
2191         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2192             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2193                 GOTO(out_statfs, rc = -EINVAL);
2194
2195         if (data->ioc_inllen1 != sizeof(__u32) ||
2196             data->ioc_inllen2 != sizeof(__u32) ||
2197             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2198             data->ioc_plen2 != sizeof(struct obd_uuid))
2199                 GOTO(out_statfs, rc = -EINVAL);
2200
2201         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2202         if (type & LL_STATFS_LMV)
2203                 exp = sbi->ll_md_exp;
2204         else if (type & LL_STATFS_LOV)
2205                 exp = sbi->ll_dt_exp;
2206         else
2207                 GOTO(out_statfs, rc = -ENODEV);
2208
2209         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2210         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2211         if (rc)
2212                 GOTO(out_statfs, rc);
2213 out_statfs:
2214         if (buf)
2215                 obd_ioctl_freedata(buf, len);
2216         return rc;
2217 }
2218
2219 int ll_process_config(struct lustre_cfg *lcfg)
2220 {
2221         char *ptr;
2222         void *sb;
2223         struct lprocfs_static_vars lvars;
2224         unsigned long x;
2225         int rc = 0;
2226
2227         lprocfs_llite_init_vars(&lvars);
2228
2229         /* The instance name contains the sb: lustre-client-aacfe000 */
2230         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2231         if (!ptr || !*(++ptr))
2232                 return -EINVAL;
2233         if (sscanf(ptr, "%lx", &x) != 1)
2234                 return -EINVAL;
2235         sb = (void *)x;
2236         /* This better be a real Lustre superblock! */
2237         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2238
2239         /* Note we have not called client_common_fill_super yet, so
2240            proc fns must be able to handle that! */
2241         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2242                                       lcfg, sb);
2243         if (rc > 0)
2244                 rc = 0;
2245         return(rc);
2246 }
2247
2248 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2249 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2250                                        struct inode *i1, struct inode *i2,
2251                                        const char *name, int namelen,
2252                                        int mode, __u32 opc, void *data)
2253 {
2254         LASSERT(i1 != NULL);
2255
2256         if (namelen > ll_i2sbi(i1)->ll_namelen)
2257                 return ERR_PTR(-ENAMETOOLONG);
2258
2259         if (op_data == NULL)
2260                 OBD_ALLOC_PTR(op_data);
2261
2262         if (op_data == NULL)
2263                 return ERR_PTR(-ENOMEM);
2264
2265         ll_i2gids(op_data->op_suppgids, i1, i2);
2266         op_data->op_fid1 = *ll_inode2fid(i1);
2267         op_data->op_capa1 = ll_mdscapa_get(i1);
2268
2269         if (i2) {
2270                 op_data->op_fid2 = *ll_inode2fid(i2);
2271                 op_data->op_capa2 = ll_mdscapa_get(i2);
2272         } else {
2273                 fid_zero(&op_data->op_fid2);
2274                 op_data->op_capa2 = NULL;
2275         }
2276
2277         op_data->op_name = name;
2278         op_data->op_namelen = namelen;
2279         op_data->op_mode = mode;
2280         op_data->op_mod_time = cfs_time_current_sec();
2281         op_data->op_fsuid = cfs_curproc_fsuid();
2282         op_data->op_fsgid = cfs_curproc_fsgid();
2283         op_data->op_cap = cfs_curproc_cap_pack();
2284         op_data->op_bias = MDS_CHECK_SPLIT;
2285         op_data->op_opc = opc;
2286         op_data->op_mds = 0;
2287         op_data->op_data = data;
2288
2289         /* If the file is being opened after mknod() (normally due to NFS)
2290          * try to use the default stripe data from parent directory for
2291          * allocating OST objects.  Try to pass the parent FID to MDS. */
2292         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2293             !ll_i2info(i2)->lli_has_smd) {
2294                 struct ll_inode_info *lli = ll_i2info(i2);
2295
2296                 cfs_spin_lock(&lli->lli_lock);
2297                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2298                         op_data->op_fid1 = lli->lli_pfid;
2299                 cfs_spin_unlock(&lli->lli_lock);
2300                 /** We ignore parent's capability temporary. */
2301         }
2302
2303         return op_data;
2304 }
2305
2306 void ll_finish_md_op_data(struct md_op_data *op_data)
2307 {
2308         capa_put(op_data->op_capa1);
2309         capa_put(op_data->op_capa2);
2310         OBD_FREE_PTR(op_data);
2311 }
2312
2313 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2314 {
2315         struct ll_sb_info *sbi;
2316
2317         LASSERT((seq != NULL) && (vfs != NULL));
2318         sbi = ll_s2sbi(vfs->mnt_sb);
2319
2320         if (sbi->ll_flags & LL_SBI_NOLCK)
2321                 seq_puts(seq, ",nolock");
2322
2323         if (sbi->ll_flags & LL_SBI_FLOCK)
2324                 seq_puts(seq, ",flock");
2325
2326         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2327                 seq_puts(seq, ",localflock");
2328
2329         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2330                 seq_puts(seq, ",user_xattr");
2331
2332         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2333                 seq_puts(seq, ",lazystatfs");
2334
2335         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2336                 seq_puts(seq, ",user_fid2path");
2337
2338         RETURN(0);
2339 }
2340
2341 /**
2342  * Get obd name by cmd, and copy out to user space
2343  */
2344 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2345 {
2346         struct ll_sb_info *sbi = ll_i2sbi(inode);
2347         struct obd_device *obd;
2348         ENTRY;
2349
2350         if (cmd == OBD_IOC_GETDTNAME)
2351                 obd = class_exp2obd(sbi->ll_dt_exp);
2352         else if (cmd == OBD_IOC_GETMDNAME)
2353                 obd = class_exp2obd(sbi->ll_md_exp);
2354         else
2355                 RETURN(-EINVAL);
2356
2357         if (!obd)
2358                 RETURN(-ENOENT);
2359
2360         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2361                              strlen(obd->obd_name) + 1))
2362                 RETURN(-EFAULT);
2363
2364         RETURN(0);
2365 }