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) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82         ENTRY;
  83
  84         OBD_ALLOC(sbi, sizeof(*sbi));
  85         if (!sbi)
  86                 RETURN(NULL);
  87
  88         spin_lock_init(&sbi->ll_lock);
  89         mutex_init(&sbi->ll_lco.lco_lock);
  90         spin_lock_init(&sbi->ll_pp_extent_lock);
  91         spin_lock_init(&sbi->ll_process_lock);
  92         sbi->ll_rw_stats_on = 0;
  93
  94         si_meminfo(&si);
  95         pages = si.totalram - si.totalhigh;
  96         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
  97 #ifdef HAVE_BGL_SUPPORT
  98                 lru_page_max = pages / 4;
  99 #else
 100                 lru_page_max = pages / 2;
 101 #endif
 102         } else {
 103                 lru_page_max = (pages / 4) * 3;
 104         }
 105
 106         /* initialize lru data */
 107         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 108         sbi->ll_cache.ccc_lru_max = lru_page_max;
 109         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 110         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 111         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 112
 113         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 114                                            SBI_DEFAULT_READAHEAD_MAX);
 115         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 116         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 117                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 118         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 119         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 120
 121         ll_generate_random_uuid(uuid);
 122         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 123         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 124
 125         spin_lock(&ll_sb_lock);
 126         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 127         spin_unlock(&ll_sb_lock);
 128
 129         sbi->ll_flags |= LL_SBI_VERBOSE;
 130 #ifdef ENABLE_CHECKSUM
 131         sbi->ll_flags |= LL_SBI_CHECKSUM;
 132 #endif
 133
 134 #ifdef HAVE_LRU_RESIZE_SUPPORT
 135         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 136 #endif
 137
 138         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 139                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 140                                pp_r_hist.oh_lock);
 141                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 142                                pp_w_hist.oh_lock);
 143         }
 144
 145         /* metadata statahead is enabled by default */
 146         sbi->ll_sa_max = LL_SA_RPC_DEF;
 147         cfs_atomic_set(&sbi->ll_sa_total, 0);
 148         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 149         cfs_atomic_set(&sbi->ll_agl_total, 0);
 150         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 151
 152         RETURN(sbi);
 153 }
 154
 155 void ll_free_sbi(struct super_block *sb)
 156 {
 157         struct ll_sb_info *sbi = ll_s2sbi(sb);
 158         ENTRY;
 159
 160         if (sbi != NULL) {
 161                 spin_lock(&ll_sb_lock);
 162                 cfs_list_del(&sbi->ll_list);
 163                 spin_unlock(&ll_sb_lock);
 164                 OBD_FREE(sbi, sizeof(*sbi));
 165         }
 166         EXIT;
 167 }
 168
 169 static struct dentry_operations ll_d_root_ops = {
 170         .d_compare = ll_dcompare,
 171         .d_revalidate = ll_revalidate_nd,
 172 };
 173
 174 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 175                                     struct vfsmount *mnt)
 176 {
 177         struct inode *root = 0;
 178         struct ll_sb_info *sbi = ll_s2sbi(sb);
 179         struct obd_device *obd;
 180         struct obd_capa *oc = NULL;
 181         struct obd_statfs *osfs = NULL;
 182         struct ptlrpc_request *request = NULL;
 183         struct obd_connect_data *data = NULL;
 184         struct obd_uuid *uuid;
 185         struct md_op_data *op_data;
 186         struct lustre_md lmd;
 187         obd_valid valid;
 188         int size, err, checksum;
 189         ENTRY;
 190
 191         obd = class_name2obd(md);
 192         if (!obd) {
 193                 CERROR("MD %s: not setup or attached\n", md);
 194                 RETURN(-EINVAL);
 195         }
 196
 197         OBD_ALLOC_PTR(data);
 198         if (data == NULL)
 199                 RETURN(-ENOMEM);
 200
 201         OBD_ALLOC_PTR(osfs);
 202         if (osfs == NULL) {
 203                 OBD_FREE_PTR(data);
 204                 RETURN(-ENOMEM);
 205         }
 206
 207         if (proc_lustre_fs_root) {
 208                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 209                                                   dt, md);
 210                 if (err < 0)
 211                         CERROR("could not register mount in /proc/fs/lustre\n");
 212         }
 213
 214         /* indicate the features supported by this client */
 215         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 216                                   OBD_CONNECT_ATTRFID  |
 217                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 218                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 219                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 220                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 221                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 222                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 223                                   OBD_CONNECT_EINPROGRESS |
 224                                   OBD_CONNECT_JOBSTATS;
 225
 226         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 227                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 228
 229 #ifdef HAVE_LRU_RESIZE_SUPPORT
 230         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 231                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 232 #endif
 233 #ifdef CONFIG_FS_POSIX_ACL
 234         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 235 #endif
 236
 237         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 238                 /* flag mdc connection as lightweight, only used for test
 239                  * purpose, use with care */
 240                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 241
 242         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 243         data->ocd_version = LUSTRE_VERSION_CODE;
 244
 245         if (sb->s_flags & MS_RDONLY)
 246                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 247         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 248                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 249
 250 #ifdef HAVE_MS_FLOCK_LOCK
 251         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 252         sb->s_flags |= MS_FLOCK_LOCK;
 253 #endif
 254 #ifdef MS_HAS_NEW_AOPS
 255         sb->s_flags |= MS_HAS_NEW_AOPS;
 256 #endif
 257
 258         if (sbi->ll_flags & LL_SBI_FLOCK)
 259                 sbi->ll_fop = &ll_file_operations_flock;
 260         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 261                 sbi->ll_fop = &ll_file_operations;
 262         else
 263                 sbi->ll_fop = &ll_file_operations_noflock;
 264
 265         /* real client */
 266         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 267         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 268                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 269
 270         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 271
 272         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 273         if (err == -EBUSY) {
 274                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 275                                    "recovery, of which this client is not a "
 276                                    "part. Please wait for recovery to complete,"
 277                                    " abort, or time out.\n", md);
 278                 GOTO(out, err);
 279         } else if (err) {
 280                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 281                 GOTO(out, err);
 282         }
 283
 284         err = obd_fid_init(sbi->ll_md_exp);
 285         if (err) {
 286                 CERROR("Can't init metadata layer FID infrastructure, "
 287                        "rc %d\n", err);
 288                 GOTO(out_md, err);
 289         }
 290
 291         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 292                          cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
 293         if (err)
 294                 GOTO(out_md_fid, err);
 295
 296         /* This needs to be after statfs to ensure connect has finished.
 297          * Note that "data" does NOT contain the valid connect reply.
 298          * If connecting to a 1.8 server there will be no LMV device, so
 299          * we can access the MDC export directly and exp_connect_flags will
 300          * be non-zero, but if accessing an upgraded 2.1 server it will
 301          * have the correct flags filled in.
 302          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 303         valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
 304         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
 305             valid != CLIENT_CONNECT_MDT_REQD) {
 306                 char *buf;
 307
 308                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 309                 obd_connect_flags2str(buf, CFS_PAGE_SIZE,
 310                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 311                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 312                                    "feature(s) needed for correct operation "
 313                                    "of this client (%s). Please upgrade "
 314                                    "server or downgrade client.\n",
 315                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 316                 OBD_FREE(buf, CFS_PAGE_SIZE);
 317                 GOTO(out_md, err = -EPROTO);
 318         }
 319
 320         size = sizeof(*data);
 321         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 322                            KEY_CONN_DATA,  &size, data, NULL);
 323         if (err) {
 324                 CERROR("Get connect data failed: %d \n", err);
 325                 GOTO(out_md, err);
 326         }
 327
 328         LASSERT(osfs->os_bsize);
 329         sb->s_blocksize = osfs->os_bsize;
 330         sb->s_blocksize_bits = log2(osfs->os_bsize);
 331         sb->s_magic = LL_SUPER_MAGIC;
 332         sb->s_maxbytes = MAX_LFS_FILESIZE;
 333         sbi->ll_namelen = osfs->os_namelen;
 334         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 335
 336         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 337             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 338                 LCONSOLE_INFO("Disabling user_xattr feature because "
 339                               "it is not supported on the server\n");
 340                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 341         }
 342
 343         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 344 #ifdef MS_POSIXACL
 345                 sb->s_flags |= MS_POSIXACL;
 346 #endif
 347                 sbi->ll_flags |= LL_SBI_ACL;
 348         } else {
 349                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 350 #ifdef MS_POSIXACL
 351                 sb->s_flags &= ~MS_POSIXACL;
 352 #endif
 353                 sbi->ll_flags &= ~LL_SBI_ACL;
 354         }
 355
 356         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 357                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 358                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 359                         LCONSOLE_INFO("client is set as remote by default.\n");
 360                 }
 361         } else {
 362                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 363                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 364                         LCONSOLE_INFO("client claims to be remote, but server "
 365                                       "rejected, forced to be local.\n");
 366                 }
 367         }
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 370                 LCONSOLE_INFO("client enabled MDS capability!\n");
 371                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 372         }
 373
 374         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 375                 LCONSOLE_INFO("client enabled OSS capability!\n");
 376                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 377         }
 378
 379         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 380                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 383                 sbi->ll_md_brw_size = data->ocd_brw_size;
 384         else
 385                 sbi->ll_md_brw_size = CFS_PAGE_SIZE;
 386
 387         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 388                 LCONSOLE_INFO("Layout lock feature supported.\n");
 389                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 390         }
 391
 392         obd = class_name2obd(dt);
 393         if (!obd) {
 394                 CERROR("DT %s: not setup or attached\n", dt);
 395                 GOTO(out_md_fid, err = -ENODEV);
 396         }
 397
 398         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 399                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 400                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 401                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 402                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 403                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 404                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 405                                   OBD_CONNECT_MAXBYTES |
 406                                   OBD_CONNECT_EINPROGRESS |
 407                                   OBD_CONNECT_JOBSTATS;
 408
 409         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 410                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 411
 412         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 413                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 414                  * disabled by default, because it can still be enabled on the
 415                  * fly via /proc. As a consequence, we still need to come to an
 416                  * agreement on the supported algorithms at connect time */
 417                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 418
 419                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 420                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 421                 else
 422                         data->ocd_cksum_types = cksum_types_supported_client();
 423         }
 424
 425 #ifdef HAVE_LRU_RESIZE_SUPPORT
 426         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 427 #endif
 428         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 429                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 430
 431         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 432                "ocd_grant: %d\n", data->ocd_connect_flags,
 433                data->ocd_version, data->ocd_grant);
 434
 435         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 436         obd->obd_upcall.onu_upcall = cl_ocd_update;
 437
 438         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 439
 440         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 441         if (err == -EBUSY) {
 442                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 443                                    "recovery, of which this client is not a "
 444                                    "part.  Please wait for recovery to "
 445                                    "complete, abort, or time out.\n", dt);
 446                 GOTO(out_md_fid, err);
 447         } else if (err) {
 448                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
 449                 GOTO(out_md_fid, err);
 450         }
 451
 452         err = obd_fid_init(sbi->ll_dt_exp);
 453         if (err) {
 454                 CERROR("Can't init data layer FID infrastructure, "
 455                        "rc %d\n", err);
 456                 GOTO(out_dt, err);
 457         }
 458
 459         mutex_lock(&sbi->ll_lco.lco_lock);
 460         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 461         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 462         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 463         mutex_unlock(&sbi->ll_lco.lco_lock);
 464
 465         fid_zero(&sbi->ll_root_fid);
 466         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 467         if (err) {
 468                 CERROR("cannot mds_connect: rc = %d\n", err);
 469                 GOTO(out_lock_cn_cb, err);
 470         }
 471         if (!fid_is_sane(&sbi->ll_root_fid)) {
 472                 CERROR("Invalid root fid during mount\n");
 473                 GOTO(out_lock_cn_cb, err = -EINVAL);
 474         }
 475         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 476
 477         sb->s_op = &lustre_super_operations;
 478 #if THREAD_SIZE >= 8192 /*b=17630*/
 479         sb->s_export_op = &lustre_export_operations;
 480 #endif
 481
 482         /* make root inode
 483          * XXX: move this to after cbd setup? */
 484         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 485         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 486                 valid |= OBD_MD_FLRMTPERM;
 487         else if (sbi->ll_flags & LL_SBI_ACL)
 488                 valid |= OBD_MD_FLACL;
 489
 490         OBD_ALLOC_PTR(op_data);
 491         if (op_data == NULL)
 492                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 493
 494         op_data->op_fid1 = sbi->ll_root_fid;
 495         op_data->op_mode = 0;
 496         op_data->op_capa1 = oc;
 497         op_data->op_valid = valid;
 498
 499         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 500         if (oc)
 501                 capa_put(oc);
 502         OBD_FREE_PTR(op_data);
 503         if (err) {
 504                 CERROR("md_getattr failed for root: rc = %d\n", err);
 505                 GOTO(out_lock_cn_cb, err);
 506         }
 507         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 508                                sbi->ll_md_exp, &lmd);
 509         if (err) {
 510                 CERROR("failed to understand root inode md: rc = %d\n", err);
 511                 ptlrpc_req_finished (request);
 512                 GOTO(out_lock_cn_cb, err);
 513         }
 514
 515         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 516         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
 517         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 518         ptlrpc_req_finished(request);
 519
 520         if (root == NULL || IS_ERR(root)) {
 521                 if (lmd.lsm)
 522                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 523 #ifdef CONFIG_FS_POSIX_ACL
 524                 if (lmd.posix_acl) {
 525                         posix_acl_release(lmd.posix_acl);
 526                         lmd.posix_acl = NULL;
 527                 }
 528 #endif
 529                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 530                 root = NULL;
 531                 CERROR("lustre_lite: bad iget4 for root\n");
 532                 GOTO(out_root, err);
 533         }
 534
 535         err = ll_close_thread_start(&sbi->ll_lcq);
 536         if (err) {
 537                 CERROR("cannot start close thread: rc %d\n", err);
 538                 GOTO(out_root, err);
 539         }
 540
 541 #ifdef CONFIG_FS_POSIX_ACL
 542         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 543                 rct_init(&sbi->ll_rct);
 544                 et_init(&sbi->ll_et);
 545         }
 546 #endif
 547
 548         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 549         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 550                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 551                                  NULL);
 552         cl_sb_init(sb);
 553
 554         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 555                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 556                                  &sbi->ll_cache, NULL);
 557
 558         sb->s_root = d_alloc_root(root);
 559 #ifdef HAVE_DCACHE_LOCK
 560         sb->s_root->d_op = &ll_d_root_ops;
 561 #else
 562         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 563         d_set_d_op(sb->s_root, &ll_d_root_ops);
 564         sb->s_d_op = &ll_d_ops;
 565 #endif
 566
 567         sbi->ll_sdev_orig = sb->s_dev;
 568
 569         /* We set sb->s_dev equal on all lustre clients in order to support
 570          * NFS export clustering.  NFSD requires that the FSID be the same
 571          * on all clients. */
 572         /* s_dev is also used in lt_compare() to compare two fs, but that is
 573          * only a node-local comparison. */
 574         uuid = obd_get_uuid(sbi->ll_md_exp);
 575         if (uuid != NULL)
 576                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 577
 578         if (data != NULL)
 579                 OBD_FREE_PTR(data);
 580         if (osfs != NULL)
 581                 OBD_FREE_PTR(osfs);
 582
 583         RETURN(err);
 584 out_root:
 585         if (root)
 586                 iput(root);
 587 out_lock_cn_cb:
 588         obd_fid_fini(sbi->ll_dt_exp);
 589 out_dt:
 590         obd_disconnect(sbi->ll_dt_exp);
 591         sbi->ll_dt_exp = NULL;
 592 out_md_fid:
 593         obd_fid_fini(sbi->ll_md_exp);
 594 out_md:
 595         obd_disconnect(sbi->ll_md_exp);
 596         sbi->ll_md_exp = NULL;
 597 out:
 598         if (data != NULL)
 599                 OBD_FREE_PTR(data);
 600         if (osfs != NULL)
 601                 OBD_FREE_PTR(osfs);
 602         lprocfs_unregister_mountpoint(sbi);
 603         return err;
 604 }
 605
 606 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 607 {
 608         int size, rc;
 609
 610         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 611         size = sizeof(int);
 612         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 613                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 614         if (rc)
 615                 CERROR("Get max mdsize error rc %d \n", rc);
 616
 617         RETURN(rc);
 618 }
 619
 620 void ll_dump_inode(struct inode *inode)
 621 {
 622         struct list_head *tmp;
 623         int dentry_count = 0;
 624
 625         LASSERT(inode != NULL);
 626
 627         list_for_each(tmp, &inode->i_dentry)
 628                 dentry_count++;
 629
 630         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 631                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 632                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 633 }
 634
 635 void lustre_dump_dentry(struct dentry *dentry, int recur)
 636 {
 637         struct list_head *tmp;
 638         int subdirs = 0;
 639
 640         LASSERT(dentry != NULL);
 641
 642         list_for_each(tmp, &dentry->d_subdirs)
 643                 subdirs++;
 644
 645         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 646                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 647                dentry->d_name.len, dentry->d_name.name,
 648                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 649                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 650                dentry->d_flags, dentry->d_fsdata, subdirs);
 651         if (dentry->d_inode != NULL)
 652                 ll_dump_inode(dentry->d_inode);
 653
 654         if (recur == 0)
 655                 return;
 656
 657         list_for_each(tmp, &dentry->d_subdirs) {
 658                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 659                 lustre_dump_dentry(d, recur - 1);
 660         }
 661 }
 662
 663 void client_common_put_super(struct super_block *sb)
 664 {
 665         struct ll_sb_info *sbi = ll_s2sbi(sb);
 666         ENTRY;
 667
 668 #ifdef CONFIG_FS_POSIX_ACL
 669         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 670                 et_fini(&sbi->ll_et);
 671                 rct_fini(&sbi->ll_rct);
 672         }
 673 #endif
 674
 675         ll_close_thread_shutdown(sbi->ll_lcq);
 676
 677         cl_sb_fini(sb);
 678
 679         cfs_list_del(&sbi->ll_conn_chain);
 680
 681         obd_fid_fini(sbi->ll_dt_exp);
 682         obd_disconnect(sbi->ll_dt_exp);
 683         sbi->ll_dt_exp = NULL;
 684
 685         lprocfs_unregister_mountpoint(sbi);
 686
 687         obd_fid_fini(sbi->ll_md_exp);
 688         obd_disconnect(sbi->ll_md_exp);
 689         sbi->ll_md_exp = NULL;
 690
 691         EXIT;
 692 }
 693
 694 void ll_kill_super(struct super_block *sb)
 695 {
 696         struct ll_sb_info *sbi;
 697
 698         ENTRY;
 699
 700         /* not init sb ?*/
 701         if (!(sb->s_flags & MS_ACTIVE))
 702                 return;
 703
 704         sbi = ll_s2sbi(sb);
 705         /* we need restore s_dev from changed for clustred NFS before put_super
 706          * because new kernels have cached s_dev and change sb->s_dev in
 707          * put_super not affected real removing devices */
 708         if (sbi)
 709                 sb->s_dev = sbi->ll_sdev_orig;
 710         EXIT;
 711 }
 712
 713 char *ll_read_opt(const char *opt, char *data)
 714 {
 715         char *value;
 716         char *retval;
 717         ENTRY;
 718
 719         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 720         if (strncmp(opt, data, strlen(opt)))
 721                 RETURN(NULL);
 722         if ((value = strchr(data, '=')) == NULL)
 723                 RETURN(NULL);
 724
 725         value++;
 726         OBD_ALLOC(retval, strlen(value) + 1);
 727         if (!retval) {
 728                 CERROR("out of memory!\n");
 729                 RETURN(NULL);
 730         }
 731
 732         memcpy(retval, value, strlen(value)+1);
 733         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 734         RETURN(retval);
 735 }
 736
 737 static inline int ll_set_opt(const char *opt, char *data, int fl)
 738 {
 739         if (strncmp(opt, data, strlen(opt)) != 0)
 740                 return(0);
 741         else
 742                 return(fl);
 743 }
 744
 745 /* non-client-specific mount options are parsed in lmd_parse */
 746 static int ll_options(char *options, int *flags)
 747 {
 748         int tmp;
 749         char *s1 = options, *s2;
 750         ENTRY;
 751
 752         if (!options)
 753                 RETURN(0);
 754
 755         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 756
 757         while (*s1) {
 758                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 759                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 760                 if (tmp) {
 761                         *flags |= tmp;
 762                         goto next;
 763                 }
 764                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 765                 if (tmp) {
 766                         *flags |= tmp;
 767                         goto next;
 768                 }
 769                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 770                 if (tmp) {
 771                         *flags |= tmp;
 772                         goto next;
 773                 }
 774                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 775                 if (tmp) {
 776                         *flags &= ~tmp;
 777                         goto next;
 778                 }
 779                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 780                 if (tmp) {
 781                         *flags |= tmp;
 782                         goto next;
 783                 }
 784                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 785                 if (tmp) {
 786                         *flags &= ~tmp;
 787                         goto next;
 788                 }
 789 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 790                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 791                 if (tmp) {
 792                         /* Ignore deprecated mount option.  The client will
 793                          * always try to mount with ACL support, whether this
 794                          * is used depends on whether server supports it. */
 795                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 796                                                   "mount option 'acl'.\n");
 797                         goto next;
 798                 }
 799                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 800                 if (tmp) {
 801                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 802                                                   "mount option 'noacl'.\n");
 803                         goto next;
 804                 }
 805 #else
 806 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 807 #endif
 808                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 809                 if (tmp) {
 810                         *flags |= tmp;
 811                         goto next;
 812                 }
 813                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 814                 if (tmp) {
 815                         *flags |= tmp;
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 819                 if (tmp) {
 820                         *flags &= ~tmp;
 821                         goto next;
 822                 }
 823
 824                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 825                 if (tmp) {
 826                         *flags |= tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 830                 if (tmp) {
 831                         *flags &= ~tmp;
 832                         goto next;
 833                 }
 834                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 835                 if (tmp) {
 836                         *flags |= tmp;
 837                         goto next;
 838                 }
 839                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 840                 if (tmp) {
 841                         *flags &= ~tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 850                 if (tmp) {
 851                         *flags &= ~tmp;
 852                         goto next;
 853                 }
 854                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 860                 if (tmp) {
 861                         *flags |= tmp;
 862                         goto next;
 863                 }
 864                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 870                 if (tmp) {
 871                         *flags &= ~tmp;
 872                         goto next;
 873                 }
 874                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 875                                    s1);
 876                 RETURN(-EINVAL);
 877
 878 next:
 879                 /* Find next opt */
 880                 s2 = strchr(s1, ',');
 881                 if (s2 == NULL)
 882                         break;
 883                 s1 = s2 + 1;
 884         }
 885         RETURN(0);
 886 }
 887
 888 void ll_lli_init(struct ll_inode_info *lli)
 889 {
 890         lli->lli_inode_magic = LLI_INODE_MAGIC;
 891         lli->lli_flags = 0;
 892         lli->lli_ioepoch = 0;
 893         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 894         spin_lock_init(&lli->lli_lock);
 895         lli->lli_posix_acl = NULL;
 896         lli->lli_remote_perms = NULL;
 897         mutex_init(&lli->lli_rmtperm_mutex);
 898         /* Do not set lli_fid, it has been initialized already. */
 899         fid_zero(&lli->lli_pfid);
 900         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 901         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 902         cfs_atomic_set(&lli->lli_open_count, 0);
 903         lli->lli_mds_capa = NULL;
 904         lli->lli_rmtperm_time = 0;
 905         lli->lli_pending_och = NULL;
 906         lli->lli_mds_read_och = NULL;
 907         lli->lli_mds_write_och = NULL;
 908         lli->lli_mds_exec_och = NULL;
 909         lli->lli_open_fd_read_count = 0;
 910         lli->lli_open_fd_write_count = 0;
 911         lli->lli_open_fd_exec_count = 0;
 912         mutex_init(&lli->lli_och_mutex);
 913         spin_lock_init(&lli->lli_agl_lock);
 914         lli->lli_has_smd = false;
 915         lli->lli_clob = NULL;
 916
 917         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 918         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 919                 mutex_init(&lli->lli_readdir_mutex);
 920                 lli->lli_opendir_key = NULL;
 921                 lli->lli_sai = NULL;
 922                 lli->lli_def_acl = NULL;
 923                 spin_lock_init(&lli->lli_sa_lock);
 924                 lli->lli_opendir_pid = 0;
 925         } else {
 926                 sema_init(&lli->lli_size_sem, 1);
 927                 lli->lli_size_sem_owner = NULL;
 928                 lli->lli_symlink_name = NULL;
 929                 init_rwsem(&lli->lli_trunc_sem);
 930                 mutex_init(&lli->lli_write_mutex);
 931                 init_rwsem(&lli->lli_glimpse_sem);
 932                 lli->lli_glimpse_time = 0;
 933                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 934                 lli->lli_agl_index = 0;
 935                 lli->lli_async_rc = 0;
 936         }
 937         mutex_init(&lli->lli_layout_mutex);
 938 }
 939
 940 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 941 {
 942 #ifdef HAVE_BDI_REGISTER
 943         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 944
 945 #ifdef HAVE_BDI_NAME
 946         bdi->name = "lustre";
 947 #endif
 948         return bdi_register(bdi, NULL, "lustre-%d",
 949                             atomic_inc_return(&ll_bdi_num));
 950 #else
 951         return 0;
 952 #endif
 953 }
 954
 955 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 956 {
 957         struct lustre_profile *lprof = NULL;
 958         struct lustre_sb_info *lsi = s2lsi(sb);
 959         struct ll_sb_info *sbi;
 960         char  *dt = NULL, *md = NULL;
 961         char  *profilenm = get_profile_name(sb);
 962         struct config_llog_instance *cfg;
 963         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 964         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 965         int    err;
 966         ENTRY;
 967
 968         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 969
 970         OBD_ALLOC_PTR(cfg);
 971         if (cfg == NULL)
 972                 RETURN(-ENOMEM);
 973
 974         cfs_module_get();
 975
 976         /* client additional sb info */
 977         lsi->lsi_llsbi = sbi = ll_init_sbi();
 978         if (!sbi) {
 979                 cfs_module_put(THIS_MODULE);
 980                 OBD_FREE_PTR(cfg);
 981                 RETURN(-ENOMEM);
 982         }
 983
 984         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 985         if (err)
 986                 GOTO(out_free, err);
 987
 988         err = ll_bdi_init(&lsi->lsi_bdi);
 989         if (err)
 990                 GOTO(out_free, err);
 991         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 992         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 993         err = ll_bdi_register(&lsi->lsi_bdi);
 994         if (err)
 995                 GOTO(out_free, err);
 996
 997 #ifdef HAVE_SB_BDI
 998         sb->s_bdi = &lsi->lsi_bdi;
 999 #endif
1000
1001         /* Generate a string unique to this super, in case some joker tries
1002            to mount the same fs at two mount points.
1003            Use the address of the super itself.*/
1004         cfg->cfg_instance = sb;
1005         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1006         cfg->cfg_callback = class_config_llog_handler;
1007         /* set up client obds */
1008         err = lustre_process_log(sb, profilenm, cfg);
1009         if (err < 0) {
1010                 CERROR("Unable to process log: %d\n", err);
1011                 GOTO(out_free, err);
1012         }
1013
1014         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1015         lprof = class_get_profile(profilenm);
1016         if (lprof == NULL) {
1017                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1018                                    " read from the MGS.  Does that filesystem "
1019                                    "exist?\n", profilenm);
1020                 GOTO(out_free, err = -EINVAL);
1021         }
1022         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1023                lprof->lp_md, lprof->lp_dt);
1024
1025         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1026         if (!dt)
1027                 GOTO(out_free, err = -ENOMEM);
1028         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1029
1030         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1031         if (!md)
1032                 GOTO(out_free, err = -ENOMEM);
1033         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1034
1035         /* connections, registrations, sb setup */
1036         err = client_common_fill_super(sb, md, dt, mnt);
1037
1038 out_free:
1039         if (md)
1040                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1041         if (dt)
1042                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1043         if (err)
1044                 ll_put_super(sb);
1045         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1046                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1047
1048         OBD_FREE_PTR(cfg);
1049         RETURN(err);
1050 } /* ll_fill_super */
1051
1052
1053 void lu_context_keys_dump(void);
1054
1055 void ll_put_super(struct super_block *sb)
1056 {
1057         struct config_llog_instance cfg;
1058         struct obd_device *obd;
1059         struct lustre_sb_info *lsi = s2lsi(sb);
1060         struct ll_sb_info *sbi = ll_s2sbi(sb);
1061         char *profilenm = get_profile_name(sb);
1062         int force = 1, next;
1063         ENTRY;
1064
1065         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1066
1067         ll_print_capa_stat(sbi);
1068
1069         cfg.cfg_instance = sb;
1070         lustre_end_log(sb, profilenm, &cfg);
1071
1072         if (sbi->ll_md_exp) {
1073                 obd = class_exp2obd(sbi->ll_md_exp);
1074                 if (obd)
1075                         force = obd->obd_force;
1076         }
1077
1078         /* We need to set force before the lov_disconnect in
1079            lustre_common_put_super, since l_d cleans up osc's as well. */
1080         if (force) {
1081                 next = 0;
1082                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1083                                                      &next)) != NULL) {
1084                         obd->obd_force = force;
1085                 }
1086         }
1087
1088         if (sbi->ll_lcq) {
1089                 /* Only if client_common_fill_super succeeded */
1090                 client_common_put_super(sb);
1091         }
1092
1093         next = 0;
1094         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1095                 class_manual_cleanup(obd);
1096         }
1097
1098         if (sbi->ll_flags & LL_SBI_VERBOSE)
1099                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1100
1101         if (profilenm)
1102                 class_del_profile(profilenm);
1103
1104         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1105                 ll_bdi_destroy(&lsi->lsi_bdi);
1106                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1107         }
1108
1109         ll_free_sbi(sb);
1110         lsi->lsi_llsbi = NULL;
1111
1112         lustre_common_put_super(sb);
1113
1114         cl_env_cache_purge(~0);
1115
1116         cfs_module_put(THIS_MODULE);
1117
1118         EXIT;
1119 } /* client_put_super */
1120
1121 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1122 {
1123         struct inode *inode = NULL;
1124         /* NOTE: we depend on atomic igrab() -bzzz */
1125         lock_res_and_lock(lock);
1126         if (lock->l_ast_data) {
1127                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1128                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1129                         inode = igrab(lock->l_ast_data);
1130                 } else {
1131                         inode = lock->l_ast_data;
1132                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1133                                          D_WARNING, lock, "l_ast_data %p is "
1134                                          "bogus: magic %08x", lock->l_ast_data,
1135                                          lli->lli_inode_magic);
1136                         inode = NULL;
1137                 }
1138         }
1139         unlock_res_and_lock(lock);
1140         return inode;
1141 }
1142
1143 static int null_if_equal(struct ldlm_lock *lock, void *data)
1144 {
1145         if (data == lock->l_ast_data) {
1146                 lock->l_ast_data = NULL;
1147
1148                 if (lock->l_req_mode != lock->l_granted_mode)
1149                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1150         }
1151
1152         return LDLM_ITER_CONTINUE;
1153 }
1154
1155 void ll_clear_inode(struct inode *inode)
1156 {
1157         struct ll_inode_info *lli = ll_i2info(inode);
1158         struct ll_sb_info *sbi = ll_i2sbi(inode);
1159         ENTRY;
1160
1161         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1162                inode->i_generation, inode);
1163
1164         if (S_ISDIR(inode->i_mode)) {
1165                 /* these should have been cleared in ll_file_release */
1166                 LASSERT(lli->lli_opendir_key == NULL);
1167                 LASSERT(lli->lli_sai == NULL);
1168                 LASSERT(lli->lli_opendir_pid == 0);
1169         }
1170
1171         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1172         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1173                          null_if_equal, inode);
1174
1175         LASSERT(!lli->lli_open_fd_write_count);
1176         LASSERT(!lli->lli_open_fd_read_count);
1177         LASSERT(!lli->lli_open_fd_exec_count);
1178
1179         if (lli->lli_mds_write_och)
1180                 ll_md_real_close(inode, FMODE_WRITE);
1181         if (lli->lli_mds_exec_och)
1182                 ll_md_real_close(inode, FMODE_EXEC);
1183         if (lli->lli_mds_read_och)
1184                 ll_md_real_close(inode, FMODE_READ);
1185
1186         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1187                 OBD_FREE(lli->lli_symlink_name,
1188                          strlen(lli->lli_symlink_name) + 1);
1189                 lli->lli_symlink_name = NULL;
1190         }
1191
1192         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1193                 LASSERT(lli->lli_posix_acl == NULL);
1194                 if (lli->lli_remote_perms) {
1195                         free_rmtperm_hash(lli->lli_remote_perms);
1196                         lli->lli_remote_perms = NULL;
1197                 }
1198         }
1199 #ifdef CONFIG_FS_POSIX_ACL
1200         else if (lli->lli_posix_acl) {
1201                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1202                 LASSERT(lli->lli_remote_perms == NULL);
1203                 posix_acl_release(lli->lli_posix_acl);
1204                 lli->lli_posix_acl = NULL;
1205         }
1206 #endif
1207         lli->lli_inode_magic = LLI_INODE_DEAD;
1208
1209         ll_clear_inode_capas(inode);
1210         if (!S_ISDIR(inode->i_mode))
1211                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1212
1213         /*
1214          * XXX This has to be done before lsm is freed below, because
1215          * cl_object still uses inode lsm.
1216          */
1217         cl_inode_fini(inode);
1218         lli->lli_has_smd = false;
1219
1220         EXIT;
1221 }
1222
1223 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1224                   struct md_open_data **mod)
1225 {
1226         struct lustre_md md;
1227         struct inode *inode = dentry->d_inode;
1228         struct ll_sb_info *sbi = ll_i2sbi(inode);
1229         struct ptlrpc_request *request = NULL;
1230         int rc, ia_valid;
1231         ENTRY;
1232
1233         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1234                                      LUSTRE_OPC_ANY, NULL);
1235         if (IS_ERR(op_data))
1236                 RETURN(PTR_ERR(op_data));
1237
1238         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1239                         &request, mod);
1240         if (rc) {
1241                 ptlrpc_req_finished(request);
1242                 if (rc == -ENOENT) {
1243                         clear_nlink(inode);
1244                         /* Unlinked special device node? Or just a race?
1245                          * Pretend we done everything. */
1246                         if (!S_ISREG(inode->i_mode) &&
1247                             !S_ISDIR(inode->i_mode)) {
1248                                 ia_valid = op_data->op_attr.ia_valid;
1249                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1250                                 rc = simple_setattr(dentry, &op_data->op_attr);
1251                                 op_data->op_attr.ia_valid = ia_valid;
1252                         }
1253                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1254                         CERROR("md_setattr fails: rc = %d\n", rc);
1255                 }
1256                 RETURN(rc);
1257         }
1258
1259         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1260                               sbi->ll_md_exp, &md);
1261         if (rc) {
1262                 ptlrpc_req_finished(request);
1263                 RETURN(rc);
1264         }
1265
1266         /* We want to adjust timestamps.
1267          * If there is at least some data in file, we cleared ATTR_SIZE
1268          * to avoid update size, otherwise it is important to do.(SOM case)
1269          * (bug 6196) */
1270         ia_valid = op_data->op_attr.ia_valid;
1271         /* Since we set ATTR_*_SET flags above, and already done permission
1272          * check, So don't let inode_change_ok() check it again.  */
1273         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1274         rc = simple_setattr(dentry, &op_data->op_attr);
1275         op_data->op_attr.ia_valid = ia_valid;
1276
1277         /* Extract epoch data if obtained. */
1278         op_data->op_handle = md.body->handle;
1279         op_data->op_ioepoch = md.body->ioepoch;
1280
1281         ll_update_inode(inode, &md);
1282         ptlrpc_req_finished(request);
1283
1284         RETURN(rc);
1285 }
1286
1287 /* Close IO epoch and send Size-on-MDS attribute update. */
1288 static int ll_setattr_done_writing(struct inode *inode,
1289                                    struct md_op_data *op_data,
1290                                    struct md_open_data *mod)
1291 {
1292         struct ll_inode_info *lli = ll_i2info(inode);
1293         int rc = 0;
1294         ENTRY;
1295
1296         LASSERT(op_data != NULL);
1297         if (!S_ISREG(inode->i_mode))
1298                 RETURN(0);
1299
1300         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1301                op_data->op_ioepoch, PFID(&lli->lli_fid));
1302
1303         op_data->op_flags = MF_EPOCH_CLOSE;
1304         ll_done_writing_attr(inode, op_data);
1305         ll_pack_inode2opdata(inode, op_data, NULL);
1306
1307         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1308         if (rc == -EAGAIN) {
1309                 /* MDS has instructed us to obtain Size-on-MDS attribute
1310                  * from OSTs and send setattr to back to MDS. */
1311                 rc = ll_som_update(inode, op_data);
1312         } else if (rc) {
1313                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1314                        inode->i_ino, rc);
1315         }
1316         RETURN(rc);
1317 }
1318
1319 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1320 {
1321         struct obd_capa *capa;
1322         int rc;
1323
1324         if (attr->ia_valid & ATTR_SIZE)
1325                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1326         else
1327                 capa = ll_mdscapa_get(inode);
1328
1329         rc = cl_setattr_ost(inode, attr, capa);
1330
1331         if (attr->ia_valid & ATTR_SIZE)
1332                 ll_truncate_free_capa(capa);
1333         else
1334                 capa_put(capa);
1335
1336         return rc;
1337 }
1338
1339 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1340 /**
1341  * inode_newsize_ok - may this inode be truncated to a given size
1342  * @inode:      the inode to be truncated
1343  * @offset:     the new size to assign to the inode
1344  * @Returns:    0 on success, -ve errno on failure
1345  *
1346  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1347  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1348  * when necessary. Caller must not proceed with inode size change if failure is
1349  * returned. @inode must be a file (not directory), with appropriate
1350  * permissions to allow truncate (inode_newsize_ok does NOT check these
1351  * conditions).
1352  *
1353  * inode_newsize_ok must be called with i_mutex held.
1354  */
1355 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1356 {
1357         if (inode->i_size < offset) {
1358                 unsigned long limit;
1359
1360                 limit = rlimit(RLIMIT_FSIZE);
1361                 if (limit != RLIM_INFINITY && offset > limit)
1362                         goto out_sig;
1363                 if (offset > inode->i_sb->s_maxbytes)
1364                         goto out_big;
1365         } else {
1366                 /*
1367                  * truncation of in-use swapfiles is disallowed - it would
1368                  * cause subsequent swapout to scribble on the now-freed
1369                  * blocks.
1370                  */
1371                 if (IS_SWAPFILE(inode))
1372                         return -ETXTBSY;
1373         }
1374
1375         return 0;
1376 out_sig:
1377         send_sig(SIGXFSZ, current, 0);
1378 out_big:
1379         return -EFBIG;
1380 }
1381 #endif
1382
1383 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1384  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1385  * keep these values until such a time that objects are allocated for it.
1386  * We do the MDS operations first, as it is checking permissions for us.
1387  * We don't to the MDS RPC if there is nothing that we want to store there,
1388  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1389  * going to do an RPC anyways.
1390  *
1391  * If we are doing a truncate, we will send the mtime and ctime updates
1392  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1393  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1394  * at the same time.
1395  */
1396 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1397 {
1398         struct lov_stripe_md *lsm;
1399         struct inode *inode = dentry->d_inode;
1400         struct ll_inode_info *lli = ll_i2info(inode);
1401         struct md_op_data *op_data = NULL;
1402         struct md_open_data *mod = NULL;
1403         int ia_valid = attr->ia_valid;
1404         int rc = 0, rc1 = 0;
1405         ENTRY;
1406
1407         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu (%p) to %llu, valid %x\n",
1408                 inode->i_ino,
1409                 inode,i_size_read(inode),
1410                 attr->ia_valid);
1411
1412         if (ia_valid & ATTR_SIZE) {
1413                 /* Check new size against VFS/VM file size limit and rlimit */
1414                 rc = inode_newsize_ok(inode, attr->ia_size);
1415                 if (rc)
1416                         RETURN(rc);
1417
1418                 /* The maximum Lustre file size is variable, based on the
1419                  * OST maximum object size and number of stripes.  This
1420                  * needs another check in addition to the VFS check above. */
1421                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1422                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1423                                PFID(&lli->lli_fid), attr->ia_size,
1424                                ll_file_maxbytes(inode));
1425                         RETURN(-EFBIG);
1426                 }
1427
1428                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1429         }
1430
1431         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1432         if (ia_valid & TIMES_SET_FLAGS) {
1433                 if (cfs_curproc_fsuid() != inode->i_uid &&
1434                     !cfs_capable(CFS_CAP_FOWNER))
1435                         RETURN(-EPERM);
1436         }
1437
1438         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1439         if (attr->ia_valid & ATTR_CTIME) {
1440                 attr->ia_ctime = CFS_CURRENT_TIME;
1441                 attr->ia_valid |= ATTR_CTIME_SET;
1442         }
1443         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1444                 attr->ia_atime = CFS_CURRENT_TIME;
1445                 attr->ia_valid |= ATTR_ATIME_SET;
1446         }
1447         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1448                 attr->ia_mtime = CFS_CURRENT_TIME;
1449                 attr->ia_valid |= ATTR_MTIME_SET;
1450         }
1451
1452         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1453                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1454                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1455                        cfs_time_current_sec());
1456
1457         /* We always do an MDS RPC, even if we're only changing the size;
1458          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1459
1460         OBD_ALLOC_PTR(op_data);
1461         if (op_data == NULL)
1462                 RETURN(-ENOMEM);
1463
1464         if (!S_ISDIR(inode->i_mode)) {
1465                 if (ia_valid & ATTR_SIZE)
1466                         inode_dio_write_done(inode);
1467                 mutex_unlock(&inode->i_mutex);
1468                 down_write(&lli->lli_trunc_sem);
1469                 mutex_lock(&inode->i_mutex);
1470                 if (ia_valid & ATTR_SIZE)
1471                         inode_dio_wait(inode);
1472         }
1473
1474         /* We need a steady stripe configuration for setattr to avoid
1475          * confusion. */
1476         lsm = ccc_inode_lsm_get(inode);
1477
1478         /* NB: ATTR_SIZE will only be set after this point if the size
1479          * resides on the MDS, ie, this file has no objects. */
1480         if (lsm != NULL)
1481                 attr->ia_valid &= ~ATTR_SIZE;
1482         /* can't call ll_setattr_ost() while holding a refcount of lsm */
1483         ccc_inode_lsm_put(inode, lsm);
1484
1485         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1486
1487         /* Open epoch for truncate. */
1488         if (exp_connect_som(ll_i2mdexp(inode)) &&
1489             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1490                 op_data->op_flags = MF_EPOCH_OPEN;
1491
1492         rc = ll_md_setattr(dentry, op_data, &mod);
1493         if (rc)
1494                 GOTO(out, rc);
1495
1496         ll_ioepoch_open(lli, op_data->op_ioepoch);
1497         if (!S_ISREG(inode->i_mode))
1498                 GOTO(out, rc = 0);
1499
1500         if (ia_valid & ATTR_SIZE)
1501                 attr->ia_valid |= ATTR_SIZE;
1502         if (ia_valid & (ATTR_SIZE |
1503                         ATTR_ATIME | ATTR_ATIME_SET |
1504                         ATTR_MTIME | ATTR_MTIME_SET))
1505                 /* For truncate and utimes sending attributes to OSTs, setting
1506                  * mtime/atime to the past will be performed under PW [0:EOF]
1507                  * extent lock (new_size:EOF for truncate).  It may seem
1508                  * excessive to send mtime/atime updates to OSTs when not
1509                  * setting times to past, but it is necessary due to possible
1510                  * time de-synchronization between MDT inode and OST objects */
1511                 rc = ll_setattr_ost(inode, attr);
1512         EXIT;
1513 out:
1514         if (op_data) {
1515                 if (op_data->op_ioepoch) {
1516                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1517                         if (!rc)
1518                                 rc = rc1;
1519                 }
1520                 ll_finish_md_op_data(op_data);
1521         }
1522         if (!S_ISDIR(inode->i_mode))
1523                 up_write(&lli->lli_trunc_sem);
1524
1525         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1526                            LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1527
1528         return rc;
1529 }
1530
1531 int ll_setattr(struct dentry *de, struct iattr *attr)
1532 {
1533         int mode = de->d_inode->i_mode;
1534
1535         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1536                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1537                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1538
1539         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1540                                (ATTR_SIZE|ATTR_MODE)) &&
1541             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1542              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1543               !(attr->ia_mode & S_ISGID))))
1544                 attr->ia_valid |= ATTR_FORCE;
1545
1546         if ((mode & S_ISUID) &&
1547             !(attr->ia_mode & S_ISUID) &&
1548             !(attr->ia_valid & ATTR_KILL_SUID))
1549                 attr->ia_valid |= ATTR_KILL_SUID;
1550
1551         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1552             !(attr->ia_mode & S_ISGID) &&
1553             !(attr->ia_valid & ATTR_KILL_SGID))
1554                 attr->ia_valid |= ATTR_KILL_SGID;
1555
1556         return ll_setattr_raw(de, attr);
1557 }
1558
1559 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1560                        __u64 max_age, __u32 flags)
1561 {
1562         struct ll_sb_info *sbi = ll_s2sbi(sb);
1563         struct obd_statfs obd_osfs;
1564         int rc;
1565         ENTRY;
1566
1567         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1568         if (rc) {
1569                 CERROR("md_statfs fails: rc = %d\n", rc);
1570                 RETURN(rc);
1571         }
1572
1573         osfs->os_type = sb->s_magic;
1574
1575         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1576                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1577
1578         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1579                 flags |= OBD_STATFS_NODELAY;
1580
1581         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1582         if (rc) {
1583                 CERROR("obd_statfs fails: rc = %d\n", rc);
1584                 RETURN(rc);
1585         }
1586
1587         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1588                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1589                obd_osfs.os_files);
1590
1591         osfs->os_bsize = obd_osfs.os_bsize;
1592         osfs->os_blocks = obd_osfs.os_blocks;
1593         osfs->os_bfree = obd_osfs.os_bfree;
1594         osfs->os_bavail = obd_osfs.os_bavail;
1595
1596         /* If we don't have as many objects free on the OST as inodes
1597          * on the MDS, we reduce the total number of inodes to
1598          * compensate, so that the "inodes in use" number is correct.
1599          */
1600         if (obd_osfs.os_ffree < osfs->os_ffree) {
1601                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1602                         obd_osfs.os_ffree;
1603                 osfs->os_ffree = obd_osfs.os_ffree;
1604         }
1605
1606         RETURN(rc);
1607 }
1608 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1609 {
1610         struct super_block *sb = de->d_sb;
1611         struct obd_statfs osfs;
1612         int rc;
1613
1614         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1615         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1616
1617         /* Some amount of caching on the client is allowed */
1618         rc = ll_statfs_internal(sb, &osfs,
1619                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1620                                 0);
1621         if (rc)
1622                 return rc;
1623
1624         statfs_unpack(sfs, &osfs);
1625
1626         /* We need to downshift for all 32-bit kernels, because we can't
1627          * tell if the kernel is being called via sys_statfs64() or not.
1628          * Stop before overflowing f_bsize - in which case it is better
1629          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1630         if (sizeof(long) < 8) {
1631                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1632                         sfs->f_bsize <<= 1;
1633
1634                         osfs.os_blocks >>= 1;
1635                         osfs.os_bfree >>= 1;
1636                         osfs.os_bavail >>= 1;
1637                 }
1638         }
1639
1640         sfs->f_blocks = osfs.os_blocks;
1641         sfs->f_bfree = osfs.os_bfree;
1642         sfs->f_bavail = osfs.os_bavail;
1643
1644         return 0;
1645 }
1646
1647 void ll_inode_size_lock(struct inode *inode)
1648 {
1649         struct ll_inode_info *lli;
1650
1651         LASSERT(!S_ISDIR(inode->i_mode));
1652
1653         lli = ll_i2info(inode);
1654         LASSERT(lli->lli_size_sem_owner != current);
1655         down(&lli->lli_size_sem);
1656         LASSERT(lli->lli_size_sem_owner == NULL);
1657         lli->lli_size_sem_owner = current;
1658 }
1659
1660 void ll_inode_size_unlock(struct inode *inode)
1661 {
1662         struct ll_inode_info *lli;
1663
1664         lli = ll_i2info(inode);
1665         LASSERT(lli->lli_size_sem_owner == current);
1666         lli->lli_size_sem_owner = NULL;
1667         up(&lli->lli_size_sem);
1668 }
1669
1670 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1671 {
1672         struct ll_inode_info *lli = ll_i2info(inode);
1673         struct mdt_body *body = md->body;
1674         struct lov_stripe_md *lsm = md->lsm;
1675         struct ll_sb_info *sbi = ll_i2sbi(inode);
1676
1677         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1678         if (lsm != NULL) {
1679                 LASSERT(S_ISREG(inode->i_mode));
1680                 CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1681                                 lsm, inode->i_ino, inode->i_generation, inode);
1682                 /* cl_file_inode_init must go before lli_has_smd or a race
1683                  * is possible where client thinks the file has stripes,
1684                  * but lov raid0 is not setup yet and parallel e.g.
1685                  * glimpse would try to use uninitialized lov */
1686                 if (cl_file_inode_init(inode, md) == 0)
1687                         lli->lli_has_smd = true;
1688
1689                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1690                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1691                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1692                 if (md->lsm != NULL)
1693                         obd_free_memmd(ll_i2dtexp(inode), &md->lsm);
1694         }
1695
1696         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1697                 if (body->valid & OBD_MD_FLRMTPERM)
1698                         ll_update_remote_perm(inode, md->remote_perm);
1699         }
1700 #ifdef CONFIG_FS_POSIX_ACL
1701         else if (body->valid & OBD_MD_FLACL) {
1702                 spin_lock(&lli->lli_lock);
1703                 if (lli->lli_posix_acl)
1704                         posix_acl_release(lli->lli_posix_acl);
1705                 lli->lli_posix_acl = md->posix_acl;
1706                 spin_unlock(&lli->lli_lock);
1707         }
1708 #endif
1709         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1710         inode->i_generation = cl_fid_build_gen(&body->fid1);
1711
1712         if (body->valid & OBD_MD_FLATIME) {
1713                 if (body->atime > LTIME_S(inode->i_atime))
1714                         LTIME_S(inode->i_atime) = body->atime;
1715                 lli->lli_lvb.lvb_atime = body->atime;
1716         }
1717         if (body->valid & OBD_MD_FLMTIME) {
1718                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1719                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1720                                "to "LPU64"\n", inode->i_ino,
1721                                LTIME_S(inode->i_mtime), body->mtime);
1722                         LTIME_S(inode->i_mtime) = body->mtime;
1723                 }
1724                 lli->lli_lvb.lvb_mtime = body->mtime;
1725         }
1726         if (body->valid & OBD_MD_FLCTIME) {
1727                 if (body->ctime > LTIME_S(inode->i_ctime))
1728                         LTIME_S(inode->i_ctime) = body->ctime;
1729                 lli->lli_lvb.lvb_ctime = body->ctime;
1730         }
1731         if (body->valid & OBD_MD_FLMODE)
1732                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1733         if (body->valid & OBD_MD_FLTYPE)
1734                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1735         LASSERT(inode->i_mode != 0);
1736         if (S_ISREG(inode->i_mode)) {
1737                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1738         } else {
1739                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1740         }
1741         if (body->valid & OBD_MD_FLUID)
1742                 inode->i_uid = body->uid;
1743         if (body->valid & OBD_MD_FLGID)
1744                 inode->i_gid = body->gid;
1745         if (body->valid & OBD_MD_FLFLAGS)
1746                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1747         if (body->valid & OBD_MD_FLNLINK)
1748                 set_nlink(inode, body->nlink);
1749         if (body->valid & OBD_MD_FLRDEV)
1750                 inode->i_rdev = old_decode_dev(body->rdev);
1751
1752         if (body->valid & OBD_MD_FLID) {
1753                 /* FID shouldn't be changed! */
1754                 if (fid_is_sane(&lli->lli_fid)) {
1755                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1756                                  "Trying to change FID "DFID
1757                                  " to the "DFID", inode %lu/%u(%p)\n",
1758                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1759                                  inode->i_ino, inode->i_generation, inode);
1760                 } else
1761                         lli->lli_fid = body->fid1;
1762         }
1763
1764         LASSERT(fid_seq(&lli->lli_fid) != 0);
1765
1766         if (body->valid & OBD_MD_FLSIZE) {
1767                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1768                     S_ISREG(inode->i_mode) && lli->lli_has_smd) {
1769                         struct lustre_handle lockh;
1770                         ldlm_mode_t mode;
1771
1772                         /* As it is possible a blocking ast has been processed
1773                          * by this time, we need to check there is an UPDATE
1774                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1775                          * it. */
1776                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1777                                                &lockh, LDLM_FL_CBPENDING);
1778                         if (mode) {
1779                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1780                                                       LLIF_EPOCH_PENDING |
1781                                                       LLIF_SOM_DIRTY)) {
1782                                         CERROR("ino %lu flags %u still has "
1783                                                "size authority! do not trust "
1784                                                "the size got from MDS\n",
1785                                                inode->i_ino, lli->lli_flags);
1786                                 } else {
1787                                         /* Use old size assignment to avoid
1788                                          * deadlock bz14138 & bz14326 */
1789                                         i_size_write(inode, body->size);
1790                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1791                                 }
1792                                 ldlm_lock_decref(&lockh, mode);
1793                         }
1794                 } else {
1795                         /* Use old size assignment to avoid
1796                          * deadlock bz14138 & bz14326 */
1797                         i_size_write(inode, body->size);
1798
1799                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1800                                inode->i_ino, (unsigned long long)body->size);
1801                 }
1802
1803                 if (body->valid & OBD_MD_FLBLOCKS)
1804                         inode->i_blocks = body->blocks;
1805         }
1806
1807         if (body->valid & OBD_MD_FLMDSCAPA) {
1808                 LASSERT(md->mds_capa);
1809                 ll_add_capa(inode, md->mds_capa);
1810         }
1811         if (body->valid & OBD_MD_FLOSSCAPA) {
1812                 LASSERT(md->oss_capa);
1813                 ll_add_capa(inode, md->oss_capa);
1814         }
1815 }
1816
1817 void ll_read_inode2(struct inode *inode, void *opaque)
1818 {
1819         struct lustre_md *md = opaque;
1820         struct ll_inode_info *lli = ll_i2info(inode);
1821         ENTRY;
1822
1823         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1824                PFID(&lli->lli_fid), inode);
1825
1826         LASSERT(!lli->lli_has_smd);
1827
1828         /* Core attributes from the MDS first.  This is a new inode, and
1829          * the VFS doesn't zero times in the core inode so we have to do
1830          * it ourselves.  They will be overwritten by either MDS or OST
1831          * attributes - we just need to make sure they aren't newer. */
1832         LTIME_S(inode->i_mtime) = 0;
1833         LTIME_S(inode->i_atime) = 0;
1834         LTIME_S(inode->i_ctime) = 0;
1835         inode->i_rdev = 0;
1836         ll_update_inode(inode, md);
1837
1838         /* OIDEBUG(inode); */
1839
1840         /* initializing backing dev info. */
1841         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1842
1843
1844         if (S_ISREG(inode->i_mode)) {
1845                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1846                 inode->i_op = &ll_file_inode_operations;
1847                 inode->i_fop = sbi->ll_fop;
1848                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1849                 EXIT;
1850         } else if (S_ISDIR(inode->i_mode)) {
1851                 inode->i_op = &ll_dir_inode_operations;
1852                 inode->i_fop = &ll_dir_operations;
1853                 EXIT;
1854         } else if (S_ISLNK(inode->i_mode)) {
1855                 inode->i_op = &ll_fast_symlink_inode_operations;
1856                 EXIT;
1857         } else {
1858                 inode->i_op = &ll_special_inode_operations;
1859
1860                 init_special_inode(inode, inode->i_mode,
1861                                    inode->i_rdev);
1862
1863                 EXIT;
1864         }
1865 }
1866
1867 void ll_delete_inode(struct inode *inode)
1868 {
1869         struct cl_inode_info *lli = cl_i2info(inode);
1870         struct ll_sb_info    *sbi = ll_i2sbi(inode);
1871         int rc;
1872         ENTRY;
1873
1874         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1875         if (rc)
1876                 CERROR("fid_delete() failed, rc %d\n", rc);
1877
1878         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1879                 /* discard all dirty pages before truncating them, required by
1880                  * osc_extent implementation at LU-1030. */
1881                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1882
1883         truncate_inode_pages(&inode->i_data, 0);
1884
1885         /* Workaround for LU-118 */
1886         if (inode->i_data.nrpages) {
1887                 TREE_READ_LOCK_IRQ(&inode->i_data);
1888                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1889                 LASSERTF(inode->i_data.nrpages == 0,
1890                          "inode=%lu/%u(%p) nrpages=%lu, see "
1891                          "http://jira.whamcloud.com/browse/LU-118\n",
1892                          inode->i_ino, inode->i_generation, inode,
1893                          inode->i_data.nrpages);
1894         }
1895         /* Workaround end */
1896
1897 #ifdef HAVE_SBOPS_EVICT_INODE
1898         ll_clear_inode(inode);
1899         end_writeback(inode);
1900 #else
1901         clear_inode(inode);
1902 #endif
1903
1904         EXIT;
1905 }
1906
1907 int ll_iocontrol(struct inode *inode, struct file *file,
1908                  unsigned int cmd, unsigned long arg)
1909 {
1910         struct ll_sb_info *sbi = ll_i2sbi(inode);
1911         struct ptlrpc_request *req = NULL;
1912         int rc, flags = 0;
1913         ENTRY;
1914
1915         switch(cmd) {
1916         case FSFILT_IOC_GETFLAGS: {
1917                 struct mdt_body *body;
1918                 struct md_op_data *op_data;
1919
1920                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1921                                              0, 0, LUSTRE_OPC_ANY,
1922                                              NULL);
1923                 if (IS_ERR(op_data))
1924                         RETURN(PTR_ERR(op_data));
1925
1926                 op_data->op_valid = OBD_MD_FLFLAGS;
1927                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1928                 ll_finish_md_op_data(op_data);
1929                 if (rc) {
1930                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1931                         RETURN(-abs(rc));
1932                 }
1933
1934                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1935
1936                 flags = body->flags;
1937
1938                 ptlrpc_req_finished(req);
1939
1940                 RETURN(put_user(flags, (int *)arg));
1941         }
1942         case FSFILT_IOC_SETFLAGS: {
1943                 struct lov_stripe_md *lsm;
1944                 struct obd_info oinfo = { { { 0 } } };
1945                 struct md_op_data *op_data;
1946
1947                 if (get_user(flags, (int *)arg))
1948                         RETURN(-EFAULT);
1949
1950                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1951                                              LUSTRE_OPC_ANY, NULL);
1952                 if (IS_ERR(op_data))
1953                         RETURN(PTR_ERR(op_data));
1954
1955                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1956                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1957                 rc = md_setattr(sbi->ll_md_exp, op_data,
1958                                 NULL, 0, NULL, 0, &req, NULL);
1959                 ll_finish_md_op_data(op_data);
1960                 ptlrpc_req_finished(req);
1961                 if (rc)
1962                         RETURN(rc);
1963
1964                 inode->i_flags = ll_ext_to_inode_flags(flags);
1965
1966                 lsm = ccc_inode_lsm_get(inode);
1967                 if (lsm == NULL)
1968                         RETURN(0);
1969
1970                 OBDO_ALLOC(oinfo.oi_oa);
1971                 if (!oinfo.oi_oa) {
1972                         ccc_inode_lsm_put(inode, lsm);
1973                         RETURN(-ENOMEM);
1974                 }
1975                 oinfo.oi_md = lsm;
1976                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1977                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1978                 oinfo.oi_oa->o_flags = flags;
1979                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1980                                        OBD_MD_FLGROUP;
1981                 oinfo.oi_capa = ll_mdscapa_get(inode);
1982                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1983                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1984                 capa_put(oinfo.oi_capa);
1985                 OBDO_FREE(oinfo.oi_oa);
1986                 ccc_inode_lsm_put(inode, lsm);
1987
1988                 if (rc && rc != -EPERM && rc != -EACCES)
1989                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1990
1991                 RETURN(rc);
1992         }
1993         default:
1994                 RETURN(-ENOSYS);
1995         }
1996
1997         RETURN(0);
1998 }
1999
2000 int ll_flush_ctx(struct inode *inode)
2001 {
2002         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2003
2004         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2005
2006         obd_set_info_async(NULL, sbi->ll_md_exp,
2007                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2008                            0, NULL, NULL);
2009         obd_set_info_async(NULL, sbi->ll_dt_exp,
2010                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2011                            0, NULL, NULL);
2012         return 0;
2013 }
2014
2015 /* umount -f client means force down, don't save state */
2016 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2017 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2018 {
2019         struct super_block *sb = vfsmnt->mnt_sb;
2020 #else
2021 void ll_umount_begin(struct super_block *sb)
2022 {
2023 #endif
2024         struct ll_sb_info *sbi = ll_s2sbi(sb);
2025         struct obd_device *obd;
2026         struct obd_ioctl_data *ioc_data;
2027         ENTRY;
2028
2029 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2030         if (!(flags & MNT_FORCE)) {
2031                 EXIT;
2032                 return;
2033         }
2034 #endif
2035
2036         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2037                sb->s_count, atomic_read(&sb->s_active));
2038
2039         obd = class_exp2obd(sbi->ll_md_exp);
2040         if (obd == NULL) {
2041                 CERROR("Invalid MDC connection handle "LPX64"\n",
2042                        sbi->ll_md_exp->exp_handle.h_cookie);
2043                 EXIT;
2044                 return;
2045         }
2046         obd->obd_force = 1;
2047
2048         obd = class_exp2obd(sbi->ll_dt_exp);
2049         if (obd == NULL) {
2050                 CERROR("Invalid LOV connection handle "LPX64"\n",
2051                        sbi->ll_dt_exp->exp_handle.h_cookie);
2052                 EXIT;
2053                 return;
2054         }
2055         obd->obd_force = 1;
2056
2057         OBD_ALLOC_PTR(ioc_data);
2058         if (ioc_data) {
2059                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2060                               sizeof ioc_data, ioc_data, NULL);
2061
2062                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2063                               sizeof ioc_data, ioc_data, NULL);
2064
2065                 OBD_FREE_PTR(ioc_data);
2066         }
2067
2068
2069         /* Really, we'd like to wait until there are no requests outstanding,
2070          * and then continue.  For now, we just invalidate the requests,
2071          * schedule() and sleep one second if needed, and hope.
2072          */
2073         cfs_schedule();
2074 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2075         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2076                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2077                                                    cfs_time_seconds(1));
2078                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2079                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2080                                       "may try to umount it a bit later\n",
2081                                       atomic_read(&vfsmnt->mnt_count));
2082         }
2083 #endif
2084
2085         EXIT;
2086 }
2087
2088 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2089 {
2090         struct ll_sb_info *sbi = ll_s2sbi(sb);
2091         char *profilenm = get_profile_name(sb);
2092         int err;
2093         __u32 read_only;
2094
2095         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2096                 read_only = *flags & MS_RDONLY;
2097                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2098                                          sizeof(KEY_READ_ONLY),
2099                                          KEY_READ_ONLY, sizeof(read_only),
2100                                          &read_only, NULL);
2101                 if (err) {
2102                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2103                                       profilenm, read_only ?
2104                                       "read-only" : "read-write", err);
2105                         return err;
2106                 }
2107
2108                 if (read_only)
2109                         sb->s_flags |= MS_RDONLY;
2110                 else
2111                         sb->s_flags &= ~MS_RDONLY;
2112
2113                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2114                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2115                                       read_only ?  "read-only" : "read-write");
2116         }
2117         return 0;
2118 }
2119
2120 int ll_prep_inode(struct inode **inode,
2121                   struct ptlrpc_request *req,
2122                   struct super_block *sb)
2123 {
2124         struct ll_sb_info *sbi = NULL;
2125         struct lustre_md md;
2126         __u64 ibits;
2127         int rc;
2128         ENTRY;
2129
2130         LASSERT(*inode || sb);
2131         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2132         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2133                               sbi->ll_md_exp, &md);
2134         if (rc)
2135                 RETURN(rc);
2136
2137         if (*inode) {
2138                 ll_update_inode(*inode, &md);
2139         } else {
2140                 LASSERT(sb != NULL);
2141
2142                 /*
2143                  * At this point server returns to client's same fid as client
2144                  * generated for creating. So using ->fid1 is okay here.
2145                  */
2146                 LASSERT(fid_is_sane(&md.body->fid1));
2147
2148                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2149                 if (*inode == NULL || IS_ERR(*inode)) {
2150                         if (md.lsm)
2151                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2152 #ifdef CONFIG_FS_POSIX_ACL
2153                         if (md.posix_acl) {
2154                                 posix_acl_release(md.posix_acl);
2155                                 md.posix_acl = NULL;
2156                         }
2157 #endif
2158                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2159                         *inode = NULL;
2160                         CERROR("new_inode -fatal: rc %d\n", rc);
2161                         GOTO(out, rc);
2162                 }
2163         }
2164
2165         /* sanity check for LAYOUT lock. */
2166         ibits = MDS_INODELOCK_LAYOUT;
2167         if (S_ISREG(md.body->mode) && sbi->ll_flags & LL_SBI_LAYOUT_LOCK &&
2168             md.lsm != NULL && !ll_have_md_lock(*inode, &ibits, LCK_MINMODE)) {
2169                 CERROR("%s: inode "DFID" (%p) layout lock not granted.\n",
2170                         ll_get_fsname(sb, NULL, 0),
2171                         PFID(ll_inode2fid(*inode)), *inode);
2172         }
2173
2174 out:
2175         md_free_lustre_md(sbi->ll_md_exp, &md);
2176         RETURN(rc);
2177 }
2178
2179 int ll_obd_statfs(struct inode *inode, void *arg)
2180 {
2181         struct ll_sb_info *sbi = NULL;
2182         struct obd_export *exp;
2183         char *buf = NULL;
2184         struct obd_ioctl_data *data = NULL;
2185         __u32 type;
2186         __u32 flags;
2187         int len = 0, rc;
2188
2189         if (!inode || !(sbi = ll_i2sbi(inode)))
2190                 GOTO(out_statfs, rc = -EINVAL);
2191
2192         rc = obd_ioctl_getdata(&buf, &len, arg);
2193         if (rc)
2194                 GOTO(out_statfs, rc);
2195
2196         data = (void*)buf;
2197         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2198             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2199                 GOTO(out_statfs, rc = -EINVAL);
2200
2201         if (data->ioc_inllen1 != sizeof(__u32) ||
2202             data->ioc_inllen2 != sizeof(__u32) ||
2203             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2204             data->ioc_plen2 != sizeof(struct obd_uuid))
2205                 GOTO(out_statfs, rc = -EINVAL);
2206
2207         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2208         if (type & LL_STATFS_LMV)
2209                 exp = sbi->ll_md_exp;
2210         else if (type & LL_STATFS_LOV)
2211                 exp = sbi->ll_dt_exp;
2212         else
2213                 GOTO(out_statfs, rc = -ENODEV);
2214
2215         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2216         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2217         if (rc)
2218                 GOTO(out_statfs, rc);
2219 out_statfs:
2220         if (buf)
2221                 obd_ioctl_freedata(buf, len);
2222         return rc;
2223 }
2224
2225 int ll_process_config(struct lustre_cfg *lcfg)
2226 {
2227         char *ptr;
2228         void *sb;
2229         struct lprocfs_static_vars lvars;
2230         unsigned long x;
2231         int rc = 0;
2232
2233         lprocfs_llite_init_vars(&lvars);
2234
2235         /* The instance name contains the sb: lustre-client-aacfe000 */
2236         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2237         if (!ptr || !*(++ptr))
2238                 return -EINVAL;
2239         if (sscanf(ptr, "%lx", &x) != 1)
2240                 return -EINVAL;
2241         sb = (void *)x;
2242         /* This better be a real Lustre superblock! */
2243         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2244
2245         /* Note we have not called client_common_fill_super yet, so
2246            proc fns must be able to handle that! */
2247         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2248                                       lcfg, sb);
2249         if (rc > 0)
2250                 rc = 0;
2251         return(rc);
2252 }
2253
2254 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2255 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2256                                        struct inode *i1, struct inode *i2,
2257                                        const char *name, int namelen,
2258                                        int mode, __u32 opc, void *data)
2259 {
2260         LASSERT(i1 != NULL);
2261
2262         if (namelen > ll_i2sbi(i1)->ll_namelen)
2263                 return ERR_PTR(-ENAMETOOLONG);
2264
2265         if (op_data == NULL)
2266                 OBD_ALLOC_PTR(op_data);
2267
2268         if (op_data == NULL)
2269                 return ERR_PTR(-ENOMEM);
2270
2271         ll_i2gids(op_data->op_suppgids, i1, i2);
2272         op_data->op_fid1 = *ll_inode2fid(i1);
2273         op_data->op_capa1 = ll_mdscapa_get(i1);
2274
2275         if (i2) {
2276                 op_data->op_fid2 = *ll_inode2fid(i2);
2277                 op_data->op_capa2 = ll_mdscapa_get(i2);
2278         } else {
2279                 fid_zero(&op_data->op_fid2);
2280                 op_data->op_capa2 = NULL;
2281         }
2282
2283         op_data->op_name = name;
2284         op_data->op_namelen = namelen;
2285         op_data->op_mode = mode;
2286         op_data->op_mod_time = cfs_time_current_sec();
2287         op_data->op_fsuid = cfs_curproc_fsuid();
2288         op_data->op_fsgid = cfs_curproc_fsgid();
2289         op_data->op_cap = cfs_curproc_cap_pack();
2290         op_data->op_bias = MDS_CHECK_SPLIT;
2291         op_data->op_opc = opc;
2292         op_data->op_mds = 0;
2293         op_data->op_data = data;
2294
2295         /* If the file is being opened after mknod() (normally due to NFS)
2296          * try to use the default stripe data from parent directory for
2297          * allocating OST objects.  Try to pass the parent FID to MDS. */
2298         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2299             !ll_i2info(i2)->lli_has_smd) {
2300                 struct ll_inode_info *lli = ll_i2info(i2);
2301
2302                 spin_lock(&lli->lli_lock);
2303                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2304                         op_data->op_fid1 = lli->lli_pfid;
2305                 spin_unlock(&lli->lli_lock);
2306                 /** We ignore parent's capability temporary. */
2307         }
2308
2309         return op_data;
2310 }
2311
2312 void ll_finish_md_op_data(struct md_op_data *op_data)
2313 {
2314         capa_put(op_data->op_capa1);
2315         capa_put(op_data->op_capa2);
2316         OBD_FREE_PTR(op_data);
2317 }
2318
2319 #ifdef HAVE_SUPEROPS_USE_DENTRY
2320 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2321 #else
2322 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2323 #endif
2324 {
2325         struct ll_sb_info *sbi;
2326
2327 #ifdef HAVE_SUPEROPS_USE_DENTRY
2328         LASSERT((seq != NULL) && (dentry != NULL));
2329         sbi = ll_s2sbi(dentry->d_sb);
2330 #else
2331         LASSERT((seq != NULL) && (vfs != NULL));
2332         sbi = ll_s2sbi(vfs->mnt_sb);
2333 #endif
2334
2335         if (sbi->ll_flags & LL_SBI_NOLCK)
2336                 seq_puts(seq, ",nolock");
2337
2338         if (sbi->ll_flags & LL_SBI_FLOCK)
2339                 seq_puts(seq, ",flock");
2340
2341         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2342                 seq_puts(seq, ",localflock");
2343
2344         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2345                 seq_puts(seq, ",user_xattr");
2346
2347         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2348                 seq_puts(seq, ",lazystatfs");
2349
2350         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2351                 seq_puts(seq, ",user_fid2path");
2352
2353         RETURN(0);
2354 }
2355
2356 /**
2357  * Get obd name by cmd, and copy out to user space
2358  */
2359 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2360 {
2361         struct ll_sb_info *sbi = ll_i2sbi(inode);
2362         struct obd_device *obd;
2363         ENTRY;
2364
2365         if (cmd == OBD_IOC_GETDTNAME)
2366                 obd = class_exp2obd(sbi->ll_dt_exp);
2367         else if (cmd == OBD_IOC_GETMDNAME)
2368                 obd = class_exp2obd(sbi->ll_md_exp);
2369         else
2370                 RETURN(-EINVAL);
2371
2372         if (!obd)
2373                 RETURN(-ENOENT);
2374
2375         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2376                              strlen(obd->obd_name) + 1))
2377                 RETURN(-EFAULT);
2378
2379         RETURN(0);
2380 }
2381
2382 /**
2383  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2384  * fsname will be returned in this buffer; otherwise, a static buffer will be
2385  * used to store the fsname and returned to caller.
2386  */
2387 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2388 {
2389         static char fsname_static[MTI_NAME_MAXLEN];
2390         struct lustre_sb_info *lsi = s2lsi(sb);
2391         char *ptr;
2392         int len;
2393
2394         if (buf == NULL) {
2395                 /* this means the caller wants to use static buffer
2396                  * and it doesn't care about race. Usually this is
2397                  * in error reporting path */
2398                 buf = fsname_static;
2399                 buflen = sizeof(fsname_static);
2400         }
2401
2402         len = strlen(lsi->lsi_lmd->lmd_profile);
2403         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2404         if (ptr && (strcmp(ptr, "-client") == 0))
2405                 len -= 7;
2406
2407         if (unlikely(len >= buflen))
2408                 len = buflen - 1;
2409         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2410         buf[len] = '\0';
2411
2412         return buf;
2413 }
2414
2415 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2416 {
2417         char *path = NULL;
2418
2419 #ifdef HAVE_FS_STRUCT_USE_PATH
2420         struct path p;
2421
2422         p.dentry = dentry;
2423         p.mnt = current->fs->root.mnt;
2424         path_get(&p);
2425         path = d_path(&p, buf, bufsize);
2426         path_put(&p);
2427 #else
2428         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2429 #endif
2430
2431         return path;
2432 }
2433
2434 void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
2435 {
2436         char *buf, *path = NULL;
2437         struct dentry *dentry = NULL;
2438         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2439
2440         buf = (char *)__get_free_page(GFP_KERNEL);
2441         if (buf != NULL) {
2442                 dentry = d_find_alias(page->mapping->host);
2443                 if (dentry != NULL)
2444                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2445         }
2446
2447         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2448               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2449               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2450               PFID(&obj->cob_header.coh_lu.loh_fid),
2451               (path && !IS_ERR(path)) ? path : "", ioret);
2452
2453         if (dentry != NULL)
2454                 dput(dentry);
2455
2456         if (buf != NULL)
2457                 free_page((unsigned long)buf);
2458 }