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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/llite_lib.c
  33  *
  34  * Lustre Light Super operations
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LLITE
  38
  39 #include <linux/module.h>
  40 #include <linux/random.h>
  41 #include <linux/statfs.h>
  42 #include <linux/time.h>
  43 #include <linux/types.h>
  44 #include <libcfs/linux/linux-uuid.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47 #include <linux/user_namespace.h>
  48 #include <linux/delay.h>
  49 #include <linux/uidgid.h>
  50 #include <linux/security.h>
  51
  52 #include <uapi/linux/lustre/lustre_ioctl.h>
  53 #ifdef HAVE_UAPI_LINUX_MOUNT_H
  54 #include <uapi/linux/mount.h>
  55 #endif
  56
  57 #include <lustre_ha.h>
  58 #include <lustre_dlm.h>
  59 #include <lprocfs_status.h>
  60 #include <lustre_disk.h>
  61 #include <uapi/linux/lustre/lustre_param.h>
  62 #include <lustre_log.h>
  63 #include <cl_object.h>
  64 #include <obd_cksum.h>
  65 #include "llite_internal.h"
  66
  67 struct kmem_cache *ll_file_data_slab;
  68
  69 #ifndef log2
  70 #define log2(n) ffz(~(n))
  71 #endif
  72
  73 /**
  74  * If there is only one number of core visible to Lustre,
  75  * async readahead will be disabled, to avoid massive over
  76  * subscription, we use 1/2 of active cores as default max
  77  * async readahead requests.
  78  */
  79 static inline unsigned int ll_get_ra_async_max_active(void)
  80 {
  81         return cfs_cpt_weight(cfs_cpt_tab, CFS_CPT_ANY) >> 1;
  82 }
  83
  84 static struct ll_sb_info *ll_init_sbi(void)
  85 {
  86         struct ll_sb_info *sbi = NULL;
  87         unsigned long pages;
  88         unsigned long lru_page_max;
  89         struct sysinfo si;
  90         int rc;
  91         int i;
  92
  93         ENTRY;
  94
  95         OBD_ALLOC_PTR(sbi);
  96         if (sbi == NULL)
  97                 RETURN(ERR_PTR(-ENOMEM));
  98
  99         rc = pcc_super_init(&sbi->ll_pcc_super);
 100         if (rc < 0)
 101                 GOTO(out_sbi, rc);
 102
 103         spin_lock_init(&sbi->ll_lock);
 104         mutex_init(&sbi->ll_lco.lco_lock);
 105         spin_lock_init(&sbi->ll_pp_extent_lock);
 106         spin_lock_init(&sbi->ll_process_lock);
 107         sbi->ll_rw_stats_on = 0;
 108         sbi->ll_statfs_max_age = OBD_STATFS_CACHE_SECONDS;
 109
 110         si_meminfo(&si);
 111         pages = si.totalram - si.totalhigh;
 112         lru_page_max = pages / 2;
 113
 114         sbi->ll_ra_info.ra_async_max_active = 0;
 115         sbi->ll_ra_info.ll_readahead_wq =
 116                 alloc_workqueue("ll-readahead-wq", WQ_UNBOUND,
 117                                 sbi->ll_ra_info.ra_async_max_active);
 118         if (!sbi->ll_ra_info.ll_readahead_wq)
 119                 GOTO(out_pcc, rc = -ENOMEM);
 120
 121         /* initialize ll_cache data */
 122         sbi->ll_cache = cl_cache_init(lru_page_max);
 123         if (sbi->ll_cache == NULL)
 124                 GOTO(out_destroy_ra, rc = -ENOMEM);
 125
 126         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 127                                                     SBI_DEFAULT_READ_AHEAD_MAX);
 128         sbi->ll_ra_info.ra_async_pages_per_file_threshold =
 129                                 sbi->ll_ra_info.ra_max_pages_per_file;
 130         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 131         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = -1;
 132         sbi->ll_ra_info.ra_async_max_active = ll_get_ra_async_max_active();
 133         atomic_set(&sbi->ll_ra_info.ra_async_inflight, 0);
 134
 135         sbi->ll_flags |= LL_SBI_VERBOSE;
 136 #ifdef ENABLE_CHECKSUM
 137         sbi->ll_flags |= LL_SBI_CHECKSUM;
 138 #endif
 139 #ifdef ENABLE_FLOCK
 140         sbi->ll_flags |= LL_SBI_FLOCK;
 141 #endif
 142
 143 #ifdef HAVE_LRU_RESIZE_SUPPORT
 144         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 145 #endif
 146         sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 147
 148         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 149                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 150                                pp_r_hist.oh_lock);
 151                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 152                                pp_w_hist.oh_lock);
 153         }
 154
 155         /* metadata statahead is enabled by default */
 156         sbi->ll_sa_running_max = LL_SA_RUNNING_DEF;
 157         sbi->ll_sa_max = LL_SA_RPC_DEF;
 158         atomic_set(&sbi->ll_sa_total, 0);
 159         atomic_set(&sbi->ll_sa_wrong, 0);
 160         atomic_set(&sbi->ll_sa_running, 0);
 161         atomic_set(&sbi->ll_agl_total, 0);
 162         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 163         sbi->ll_flags |= LL_SBI_FAST_READ;
 164         sbi->ll_flags |= LL_SBI_TINY_WRITE;
 165
 166         /* root squash */
 167         sbi->ll_squash.rsi_uid = 0;
 168         sbi->ll_squash.rsi_gid = 0;
 169         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 170         spin_lock_init(&sbi->ll_squash.rsi_lock);
 171
 172         /* Per-filesystem file heat */
 173         sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
 174         sbi->ll_heat_period_second = SBI_DEFAULT_HEAT_PERIOD_SECOND;
 175         RETURN(sbi);
 176 out_destroy_ra:
 177         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 178 out_pcc:
 179         pcc_super_fini(&sbi->ll_pcc_super);
 180 out_sbi:
 181         OBD_FREE_PTR(sbi);
 182         RETURN(ERR_PTR(rc));
 183 }
 184
 185 static void ll_free_sbi(struct super_block *sb)
 186 {
 187         struct ll_sb_info *sbi = ll_s2sbi(sb);
 188         ENTRY;
 189
 190         if (sbi != NULL) {
 191                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 192                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 193                 if (sbi->ll_ra_info.ll_readahead_wq)
 194                         destroy_workqueue(sbi->ll_ra_info.ll_readahead_wq);
 195                 if (sbi->ll_cache != NULL) {
 196                         cl_cache_decref(sbi->ll_cache);
 197                         sbi->ll_cache = NULL;
 198                 }
 199                 pcc_super_fini(&sbi->ll_pcc_super);
 200                 OBD_FREE(sbi, sizeof(*sbi));
 201         }
 202         EXIT;
 203 }
 204
 205 static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 206 {
 207         struct inode *root = NULL;
 208         struct ll_sb_info *sbi = ll_s2sbi(sb);
 209         struct obd_statfs *osfs = NULL;
 210         struct ptlrpc_request *request = NULL;
 211         struct obd_connect_data *data = NULL;
 212         struct obd_uuid *uuid;
 213         struct md_op_data *op_data;
 214         struct lustre_md lmd;
 215         u64 valid;
 216         int size, err, checksum;
 217
 218         ENTRY;
 219         sbi->ll_md_obd = class_name2obd(md);
 220         if (!sbi->ll_md_obd) {
 221                 CERROR("MD %s: not setup or attached\n", md);
 222                 RETURN(-EINVAL);
 223         }
 224
 225         OBD_ALLOC_PTR(data);
 226         if (data == NULL)
 227                 RETURN(-ENOMEM);
 228
 229         OBD_ALLOC_PTR(osfs);
 230         if (osfs == NULL) {
 231                 OBD_FREE_PTR(data);
 232                 RETURN(-ENOMEM);
 233         }
 234
 235         /* pass client page size via ocd_grant_blkbits, the server should report
 236          * back its backend blocksize for grant calculation purpose */
 237         data->ocd_grant_blkbits = PAGE_SHIFT;
 238
 239         /* indicate MDT features supported by this client */
 240         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 241                                   OBD_CONNECT_ATTRFID  | OBD_CONNECT_GRANT |
 242                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 243                                   OBD_CONNECT_SRVLOCK  | OBD_CONNECT_TRUNCLOCK|
 244                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 245                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 246                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 247                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 248                                   OBD_CONNECT_64BITHASH |
 249                                   OBD_CONNECT_EINPROGRESS |
 250                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 251                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS|
 252                                   OBD_CONNECT_MAX_EASIZE |
 253                                   OBD_CONNECT_FLOCK_DEAD |
 254                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 255                                   OBD_CONNECT_OPEN_BY_FID |
 256                                   OBD_CONNECT_DIR_STRIPE |
 257                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_CKSUM |
 258                                   OBD_CONNECT_SUBTREE |
 259                                   OBD_CONNECT_MULTIMODRPCS |
 260                                   OBD_CONNECT_GRANT_PARAM |
 261                                   OBD_CONNECT_SHORTIO | OBD_CONNECT_FLAGS2;
 262
 263         data->ocd_connect_flags2 = OBD_CONNECT2_DIR_MIGRATE |
 264                                    OBD_CONNECT2_SUM_STATFS |
 265                                    OBD_CONNECT2_OVERSTRIPING |
 266                                    OBD_CONNECT2_FLR |
 267                                    OBD_CONNECT2_LOCK_CONVERT |
 268                                    OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 269                                    OBD_CONNECT2_INC_XID |
 270                                    OBD_CONNECT2_LSOM |
 271                                    OBD_CONNECT2_ASYNC_DISCARD |
 272                                    OBD_CONNECT2_PCC |
 273                                    OBD_CONNECT2_CRUSH;
 274
 275 #ifdef HAVE_LRU_RESIZE_SUPPORT
 276         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 277                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 278 #endif
 279 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
 280         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK |
 281                                    OBD_CONNECT_LARGE_ACL;
 282 #endif
 283
 284         data->ocd_cksum_types = obd_cksum_types_supported_client();
 285
 286         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 287                 /* flag mdc connection as lightweight, only used for test
 288                  * purpose, use with care */
 289                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 290
 291         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 292         data->ocd_version = LUSTRE_VERSION_CODE;
 293
 294         if (sb->s_flags & SB_RDONLY)
 295                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 296         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 297                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 298
 299 #ifdef SB_NOSEC
 300         /* Setting this indicates we correctly support S_NOSEC (See kernel
 301          * commit 9e1f1de02c2275d7172e18dc4e7c2065777611bf)
 302          */
 303         sb->s_flags |= SB_NOSEC;
 304 #endif
 305
 306         if (sbi->ll_flags & LL_SBI_FLOCK)
 307                 sbi->ll_fop = &ll_file_operations_flock;
 308         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 309                 sbi->ll_fop = &ll_file_operations;
 310         else
 311                 sbi->ll_fop = &ll_file_operations_noflock;
 312
 313         /* always ping even if server suppress_pings */
 314         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 315                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 316
 317         obd_connect_set_secctx(data);
 318
 319 #if defined(CONFIG_SECURITY)
 320         data->ocd_connect_flags2 |= OBD_CONNECT2_SELINUX_POLICY;
 321 #endif
 322
 323         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 324
 325         err = obd_connect(NULL, &sbi->ll_md_exp, sbi->ll_md_obd,
 326                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 327         if (err == -EBUSY) {
 328                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 329                                    "recovery, of which this client is not a "
 330                                    "part. Please wait for recovery to complete,"
 331                                    " abort, or time out.\n", md);
 332                 GOTO(out, err);
 333         } else if (err) {
 334                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 335                 GOTO(out, err);
 336         }
 337
 338         sbi->ll_md_exp->exp_connect_data = *data;
 339
 340         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 341                            LUSTRE_SEQ_METADATA);
 342         if (err) {
 343                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 344                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 345                 GOTO(out_md, err);
 346         }
 347
 348         /* For mount, we only need fs info from MDT0, and also in DNE, it
 349          * can make sure the client can be mounted as long as MDT0 is
 350          * avaible */
 351         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 352                         ktime_get_seconds() - sbi->ll_statfs_max_age,
 353                         OBD_STATFS_FOR_MDT0);
 354         if (err)
 355                 GOTO(out_md_fid, err);
 356
 357         /* This needs to be after statfs to ensure connect has finished.
 358          * Note that "data" does NOT contain the valid connect reply.
 359          * If connecting to a 1.8 server there will be no LMV device, so
 360          * we can access the MDC export directly and exp_connect_flags will
 361          * be non-zero, but if accessing an upgraded 2.1 server it will
 362          * have the correct flags filled in.
 363          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 364         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 365         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 366             valid != CLIENT_CONNECT_MDT_REQD) {
 367                 char *buf;
 368
 369                 OBD_ALLOC_WAIT(buf, PAGE_SIZE);
 370                 obd_connect_flags2str(buf, PAGE_SIZE,
 371                                       valid ^ CLIENT_CONNECT_MDT_REQD, 0, ",");
 372                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 373                                    "feature(s) needed for correct operation "
 374                                    "of this client (%s). Please upgrade "
 375                                    "server or downgrade client.\n",
 376                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 377                 OBD_FREE(buf, PAGE_SIZE);
 378                 GOTO(out_md_fid, err = -EPROTO);
 379         }
 380
 381         size = sizeof(*data);
 382         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 383                            KEY_CONN_DATA,  &size, data);
 384         if (err) {
 385                 CERROR("%s: Get connect data failed: rc = %d\n",
 386                        sbi->ll_md_exp->exp_obd->obd_name, err);
 387                 GOTO(out_md_fid, err);
 388         }
 389
 390         LASSERT(osfs->os_bsize);
 391         sb->s_blocksize = osfs->os_bsize;
 392         sb->s_blocksize_bits = log2(osfs->os_bsize);
 393         sb->s_magic = LL_SUPER_MAGIC;
 394         sb->s_maxbytes = MAX_LFS_FILESIZE;
 395         sbi->ll_namelen = osfs->os_namelen;
 396         sbi->ll_mnt.mnt = current->fs->root.mnt;
 397
 398         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 399             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 400                 LCONSOLE_INFO("Disabling user_xattr feature because "
 401                               "it is not supported on the server\n");
 402                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 403         }
 404
 405         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 406 #ifdef SB_POSIXACL
 407                 sb->s_flags |= SB_POSIXACL;
 408 #endif
 409                 sbi->ll_flags |= LL_SBI_ACL;
 410         } else {
 411                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 412 #ifdef SB_POSIXACL
 413                 sb->s_flags &= ~SB_POSIXACL;
 414 #endif
 415                 sbi->ll_flags &= ~LL_SBI_ACL;
 416         }
 417
 418         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 419                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 420
 421         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 422                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 423
 424         if (obd_connect_has_secctx(data))
 425                 sbi->ll_flags |= LL_SBI_FILE_SECCTX;
 426
 427         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 428                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 429                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 430                                       "unknown maximum xattr size.\n", dt);
 431                 } else if (!sbi->ll_xattr_cache_set) {
 432                         /* If xattr_cache is already set (no matter 0 or 1)
 433                          * during processing llog, it won't be enabled here. */
 434                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 435                         sbi->ll_xattr_cache_enabled = 1;
 436                 }
 437         }
 438
 439         sbi->ll_dt_obd = class_name2obd(dt);
 440         if (!sbi->ll_dt_obd) {
 441                 CERROR("DT %s: not setup or attached\n", dt);
 442                 GOTO(out_md_fid, err = -ENODEV);
 443         }
 444
 445         /* pass client page size via ocd_grant_blkbits, the server should report
 446          * back its backend blocksize for grant calculation purpose */
 447         data->ocd_grant_blkbits = PAGE_SHIFT;
 448
 449         /* indicate OST features supported by this client */
 450         data->ocd_connect_flags = OBD_CONNECT_GRANT | OBD_CONNECT_VERSION |
 451                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 452                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID |
 453                                   OBD_CONNECT_SRVLOCK | OBD_CONNECT_TRUNCLOCK|
 454                                   OBD_CONNECT_AT | OBD_CONNECT_OSS_CAPA |
 455                                   OBD_CONNECT_VBR | OBD_CONNECT_FULL20 |
 456                                   OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES |
 457                                   OBD_CONNECT_EINPROGRESS |
 458                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 459                                   OBD_CONNECT_LAYOUTLOCK |
 460                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 461                                   OBD_CONNECT_BULK_MBITS | OBD_CONNECT_SHORTIO |
 462                                   OBD_CONNECT_FLAGS2 | OBD_CONNECT_GRANT_SHRINK;
 463         data->ocd_connect_flags2 = OBD_CONNECT2_LOCKAHEAD |
 464                                    OBD_CONNECT2_INC_XID;
 465
 466         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_GRANT_PARAM))
 467                 data->ocd_connect_flags |= OBD_CONNECT_GRANT_PARAM;
 468
 469         /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 470          * disabled by default, because it can still be enabled on the
 471          * fly via /sys. As a consequence, we still need to come to an
 472          * agreement on the supported algorithms at connect time
 473          */
 474         data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 475
 476         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 477                 data->ocd_cksum_types = OBD_CKSUM_ADLER;
 478         else
 479                 data->ocd_cksum_types = obd_cksum_types_supported_client();
 480
 481 #ifdef HAVE_LRU_RESIZE_SUPPORT
 482         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 483 #endif
 484         /* always ping even if server suppress_pings */
 485         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 486                 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 487
 488         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d "
 489                "ocd_grant: %d\n", data->ocd_connect_flags,
 490                data->ocd_version, data->ocd_grant);
 491
 492         sbi->ll_dt_obd->obd_upcall.onu_owner = &sbi->ll_lco;
 493         sbi->ll_dt_obd->obd_upcall.onu_upcall = cl_ocd_update;
 494
 495         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 496
 497         err = obd_connect(NULL, &sbi->ll_dt_exp, sbi->ll_dt_obd,
 498                           &sbi->ll_sb_uuid, data, sbi->ll_cache);
 499         if (err == -EBUSY) {
 500                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 501                                    "recovery, of which this client is not a "
 502                                    "part.  Please wait for recovery to "
 503                                    "complete, abort, or time out.\n", dt);
 504                 GOTO(out_md, err);
 505         } else if (err) {
 506                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 507                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 508                 GOTO(out_md, err);
 509         }
 510
 511         sbi->ll_dt_exp->exp_connect_data = *data;
 512
 513         /* Don't change value if it was specified in the config log */
 514         if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) {
 515                 sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 516                         max_t(unsigned long, SBI_DEFAULT_READ_AHEAD_WHOLE_MAX,
 517                               (data->ocd_brw_size >> PAGE_SHIFT));
 518                 if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages >
 519                     sbi->ll_ra_info.ra_max_pages_per_file)
 520                         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 521                                 sbi->ll_ra_info.ra_max_pages_per_file;
 522         }
 523
 524         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 525                            LUSTRE_SEQ_METADATA);
 526         if (err) {
 527                 CERROR("%s: Can't init data layer FID infrastructure, "
 528                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 529                 GOTO(out_dt, err);
 530         }
 531
 532         mutex_lock(&sbi->ll_lco.lco_lock);
 533         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 534         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 535         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 536         mutex_unlock(&sbi->ll_lco.lco_lock);
 537
 538         fid_zero(&sbi->ll_root_fid);
 539         err = md_get_root(sbi->ll_md_exp, get_mount_fileset(sb),
 540                            &sbi->ll_root_fid);
 541         if (err) {
 542                 CERROR("cannot mds_connect: rc = %d\n", err);
 543                 GOTO(out_lock_cn_cb, err);
 544         }
 545         if (!fid_is_sane(&sbi->ll_root_fid)) {
 546                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 547                        sbi->ll_md_exp->exp_obd->obd_name,
 548                        PFID(&sbi->ll_root_fid));
 549                 GOTO(out_lock_cn_cb, err = -EINVAL);
 550         }
 551         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 552
 553         sb->s_op = &lustre_super_operations;
 554         sb->s_xattr = ll_xattr_handlers;
 555 #if THREAD_SIZE >= 8192 /*b=17630*/
 556         sb->s_export_op = &lustre_export_operations;
 557 #endif
 558
 559         /* make root inode
 560          * XXX: move this to after cbd setup? */
 561         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 562         if (sbi->ll_flags & LL_SBI_ACL)
 563                 valid |= OBD_MD_FLACL;
 564
 565         OBD_ALLOC_PTR(op_data);
 566         if (op_data == NULL)
 567                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 568
 569         op_data->op_fid1 = sbi->ll_root_fid;
 570         op_data->op_mode = 0;
 571         op_data->op_valid = valid;
 572
 573         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 574
 575         OBD_FREE_PTR(op_data);
 576         if (err) {
 577                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 578                        sbi->ll_md_exp->exp_obd->obd_name, err);
 579                 GOTO(out_lock_cn_cb, err);
 580         }
 581
 582         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 583                                sbi->ll_md_exp, &lmd);
 584         if (err) {
 585                 CERROR("failed to understand root inode md: rc = %d\n", err);
 586                 ptlrpc_req_finished(request);
 587                 GOTO(out_lock_cn_cb, err);
 588         }
 589
 590         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 591         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 592                                             sbi->ll_flags & LL_SBI_32BIT_API),
 593                        &lmd);
 594         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 595         ptlrpc_req_finished(request);
 596
 597         if (IS_ERR(root)) {
 598 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
 599                 if (lmd.posix_acl) {
 600                         posix_acl_release(lmd.posix_acl);
 601                         lmd.posix_acl = NULL;
 602                 }
 603 #endif
 604                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 605                 root = NULL;
 606                 CERROR("%s: bad ll_iget() for root: rc = %d\n",
 607                        sbi->ll_fsname, err);
 608                 GOTO(out_root, err);
 609         }
 610
 611         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 612         if (sbi->ll_checksum_set) {
 613                 err = obd_set_info_async(NULL, sbi->ll_dt_exp,
 614                                          sizeof(KEY_CHECKSUM), KEY_CHECKSUM,
 615                                          sizeof(checksum), &checksum, NULL);
 616                 if (err) {
 617                         CERROR("%s: Set checksum failed: rc = %d\n",
 618                                sbi->ll_dt_exp->exp_obd->obd_name, err);
 619                         GOTO(out_root, err);
 620                 }
 621         }
 622         cl_sb_init(sb);
 623
 624         sb->s_root = d_make_root(root);
 625         if (sb->s_root == NULL) {
 626                 err = -ENOMEM;
 627                 CERROR("%s: can't make root dentry: rc = %d\n",
 628                        sbi->ll_fsname, err);
 629                 GOTO(out_root, err);
 630         }
 631
 632         sbi->ll_sdev_orig = sb->s_dev;
 633
 634         /* We set sb->s_dev equal on all lustre clients in order to support
 635          * NFS export clustering.  NFSD requires that the FSID be the same
 636          * on all clients. */
 637         /* s_dev is also used in lt_compare() to compare two fs, but that is
 638          * only a node-local comparison. */
 639         uuid = obd_get_uuid(sbi->ll_md_exp);
 640         if (uuid != NULL)
 641                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 642
 643         if (data != NULL)
 644                 OBD_FREE_PTR(data);
 645         if (osfs != NULL)
 646                 OBD_FREE_PTR(osfs);
 647
 648         if (sbi->ll_dt_obd) {
 649                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 650                                         &sbi->ll_dt_obd->obd_kset.kobj,
 651                                         sbi->ll_dt_obd->obd_type->typ_name);
 652                 if (err < 0) {
 653                         CERROR("%s: could not register %s in llite: rc = %d\n",
 654                                dt, sbi->ll_fsname, err);
 655                         err = 0;
 656                 }
 657         }
 658
 659         if (sbi->ll_md_obd) {
 660                 err = sysfs_create_link(&sbi->ll_kset.kobj,
 661                                         &sbi->ll_md_obd->obd_kset.kobj,
 662                                         sbi->ll_md_obd->obd_type->typ_name);
 663                 if (err < 0) {
 664                         CERROR("%s: could not register %s in llite: rc = %d\n",
 665                                md, sbi->ll_fsname, err);
 666                         err = 0;
 667                 }
 668         }
 669
 670         RETURN(err);
 671 out_root:
 672         if (root)
 673                 iput(root);
 674 out_lock_cn_cb:
 675         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 676 out_dt:
 677         obd_disconnect(sbi->ll_dt_exp);
 678         sbi->ll_dt_exp = NULL;
 679         sbi->ll_dt_obd = NULL;
 680 out_md_fid:
 681         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 682 out_md:
 683         obd_disconnect(sbi->ll_md_exp);
 684         sbi->ll_md_exp = NULL;
 685         sbi->ll_md_obd = NULL;
 686 out:
 687         if (data != NULL)
 688                 OBD_FREE_PTR(data);
 689         if (osfs != NULL)
 690                 OBD_FREE_PTR(osfs);
 691         return err;
 692 }
 693
 694 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 695 {
 696         int size, rc;
 697
 698         size = sizeof(*lmmsize);
 699         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 700                           KEY_MAX_EASIZE, &size, lmmsize);
 701         if (rc != 0) {
 702                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 703                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 704                 RETURN(rc);
 705         }
 706
 707         CDEBUG(D_INFO, "max LOV ea size: %d\n", *lmmsize);
 708
 709         size = sizeof(int);
 710         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 711                           KEY_MAX_EASIZE, &size, lmmsize);
 712         if (rc)
 713                 CERROR("Get max mdsize error rc %d\n", rc);
 714
 715         CDEBUG(D_INFO, "max LMV ea size: %d\n", *lmmsize);
 716
 717         RETURN(rc);
 718 }
 719
 720 /**
 721  * Get the value of the default_easize parameter.
 722  *
 723  * \see client_obd::cl_default_mds_easize
 724  *
 725  * \param[in] sbi       superblock info for this filesystem
 726  * \param[out] lmmsize  pointer to storage location for value
 727  *
 728  * \retval 0            on success
 729  * \retval negative     negated errno on failure
 730  */
 731 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 732 {
 733         int size, rc;
 734
 735         size = sizeof(int);
 736         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 737                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 738         if (rc)
 739                 CERROR("Get default mdsize error rc %d\n", rc);
 740
 741         RETURN(rc);
 742 }
 743
 744 /**
 745  * Set the default_easize parameter to the given value.
 746  *
 747  * \see client_obd::cl_default_mds_easize
 748  *
 749  * \param[in] sbi       superblock info for this filesystem
 750  * \param[in] lmmsize   the size to set
 751  *
 752  * \retval 0            on success
 753  * \retval negative     negated errno on failure
 754  */
 755 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 756 {
 757         int rc;
 758
 759         if (lmmsize < sizeof(struct lov_mds_md) ||
 760             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 761                 return -EINVAL;
 762
 763         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 764                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 765                                 sizeof(int), &lmmsize, NULL);
 766
 767         RETURN(rc);
 768 }
 769
 770 static void client_common_put_super(struct super_block *sb)
 771 {
 772         struct ll_sb_info *sbi = ll_s2sbi(sb);
 773         ENTRY;
 774
 775         cl_sb_fini(sb);
 776
 777         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 778         obd_disconnect(sbi->ll_dt_exp);
 779         sbi->ll_dt_exp = NULL;
 780
 781         ll_debugfs_unregister_super(sb);
 782
 783         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 784         obd_disconnect(sbi->ll_md_exp);
 785         sbi->ll_md_exp = NULL;
 786
 787         EXIT;
 788 }
 789
 790 void ll_kill_super(struct super_block *sb)
 791 {
 792         struct ll_sb_info *sbi;
 793         ENTRY;
 794
 795         /* not init sb ?*/
 796         if (!(sb->s_flags & SB_ACTIVE))
 797                 return;
 798
 799         sbi = ll_s2sbi(sb);
 800         /* we need restore s_dev from changed for clustred NFS before put_super
 801          * because new kernels have cached s_dev and change sb->s_dev in
 802          * put_super not affected real removing devices */
 803         if (sbi) {
 804                 sb->s_dev = sbi->ll_sdev_orig;
 805
 806                 /* wait running statahead threads to quit */
 807                 while (atomic_read(&sbi->ll_sa_running) > 0)
 808                         schedule_timeout_uninterruptible(
 809                                 cfs_time_seconds(1) >> 3);
 810         }
 811
 812         EXIT;
 813 }
 814
 815 static inline int ll_set_opt(const char *opt, char *data, int fl)
 816 {
 817         if (strncmp(opt, data, strlen(opt)) != 0)
 818                 return 0;
 819         else
 820                 return fl;
 821 }
 822
 823 /* non-client-specific mount options are parsed in lmd_parse */
 824 static int ll_options(char *options, struct ll_sb_info *sbi)
 825 {
 826         int tmp;
 827         char *s1 = options, *s2;
 828         int *flags = &sbi->ll_flags;
 829         ENTRY;
 830
 831         if (!options)
 832                 RETURN(0);
 833
 834         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 835
 836         while (*s1) {
 837                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 838                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 839                 if (tmp) {
 840                         *flags |= tmp;
 841                         goto next;
 842                 }
 843                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 844                 if (tmp) {
 845                         *flags = (*flags & ~LL_SBI_LOCALFLOCK) | tmp;
 846                         goto next;
 847                 }
 848                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 849                 if (tmp) {
 850                         *flags = (*flags & ~LL_SBI_FLOCK) | tmp;
 851                         goto next;
 852                 }
 853                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 854                 if (tmp) {
 855                         *flags &= ~tmp;
 856                         goto next;
 857                 }
 858                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 859                 if (tmp) {
 860                         *flags |= tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 864                 if (tmp) {
 865                         *flags &= ~tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("context", s1, 1);
 869                 if (tmp)
 870                         goto next;
 871                 tmp = ll_set_opt("fscontext", s1, 1);
 872                 if (tmp)
 873                         goto next;
 874                 tmp = ll_set_opt("defcontext", s1, 1);
 875                 if (tmp)
 876                         goto next;
 877                 tmp = ll_set_opt("rootcontext", s1, 1);
 878                 if (tmp)
 879                         goto next;
 880                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 881                 if (tmp) {
 882                         *flags |= tmp;
 883                         goto next;
 884                 }
 885                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 886                 if (tmp) {
 887                         *flags &= ~tmp;
 888                         goto next;
 889                 }
 890
 891                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 892                 if (tmp) {
 893                         *flags |= tmp;
 894                         sbi->ll_checksum_set = 1;
 895                         goto next;
 896                 }
 897                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 898                 if (tmp) {
 899                         *flags &= ~tmp;
 900                         sbi->ll_checksum_set = 1;
 901                         goto next;
 902                 }
 903                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 904                 if (tmp) {
 905                         *flags |= tmp;
 906                         goto next;
 907                 }
 908                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 909                 if (tmp) {
 910                         *flags &= ~tmp;
 911                         goto next;
 912                 }
 913                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 914                 if (tmp) {
 915                         *flags |= tmp;
 916                         goto next;
 917                 }
 918                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 919                 if (tmp) {
 920                         *flags &= ~tmp;
 921                         goto next;
 922                 }
 923                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 924                 if (tmp) {
 925                         *flags |= tmp;
 926                         goto next;
 927                 }
 928                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 929                 if (tmp) {
 930                         *flags |= tmp;
 931                         goto next;
 932                 }
 933                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 934                 if (tmp) {
 935                         *flags &= ~tmp;
 936                         goto next;
 937                 }
 938                 tmp = ll_set_opt("always_ping", s1, LL_SBI_ALWAYS_PING);
 939                 if (tmp) {
 940                         *flags |= tmp;
 941                         goto next;
 942                 }
 943                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 944                                    s1);
 945                 RETURN(-EINVAL);
 946
 947 next:
 948                 /* Find next opt */
 949                 s2 = strchr(s1, ',');
 950                 if (s2 == NULL)
 951                         break;
 952                 s1 = s2 + 1;
 953         }
 954         RETURN(0);
 955 }
 956
 957 void ll_lli_init(struct ll_inode_info *lli)
 958 {
 959         lli->lli_inode_magic = LLI_INODE_MAGIC;
 960         lli->lli_flags = 0;
 961         spin_lock_init(&lli->lli_lock);
 962         lli->lli_posix_acl = NULL;
 963         /* Do not set lli_fid, it has been initialized already. */
 964         fid_zero(&lli->lli_pfid);
 965         lli->lli_mds_read_och = NULL;
 966         lli->lli_mds_write_och = NULL;
 967         lli->lli_mds_exec_och = NULL;
 968         lli->lli_open_fd_read_count = 0;
 969         lli->lli_open_fd_write_count = 0;
 970         lli->lli_open_fd_exec_count = 0;
 971         mutex_init(&lli->lli_och_mutex);
 972         spin_lock_init(&lli->lli_agl_lock);
 973         spin_lock_init(&lli->lli_layout_lock);
 974         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 975         lli->lli_clob = NULL;
 976
 977         init_rwsem(&lli->lli_xattrs_list_rwsem);
 978         mutex_init(&lli->lli_xattrs_enq_lock);
 979
 980         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 981         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 982                 lli->lli_opendir_key = NULL;
 983                 lli->lli_sai = NULL;
 984                 spin_lock_init(&lli->lli_sa_lock);
 985                 lli->lli_opendir_pid = 0;
 986                 lli->lli_sa_enabled = 0;
 987                 init_rwsem(&lli->lli_lsm_sem);
 988         } else {
 989                 mutex_init(&lli->lli_size_mutex);
 990                 lli->lli_symlink_name = NULL;
 991                 ll_trunc_sem_init(&lli->lli_trunc_sem);
 992                 range_lock_tree_init(&lli->lli_write_tree);
 993                 init_rwsem(&lli->lli_glimpse_sem);
 994                 lli->lli_glimpse_time = ktime_set(0, 0);
 995                 INIT_LIST_HEAD(&lli->lli_agl_list);
 996                 lli->lli_agl_index = 0;
 997                 lli->lli_async_rc = 0;
 998                 spin_lock_init(&lli->lli_heat_lock);
 999                 obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
1000                 lli->lli_heat_flags = 0;
1001                 mutex_init(&lli->lli_pcc_lock);
1002                 lli->lli_pcc_state = PCC_STATE_FL_NONE;
1003                 lli->lli_pcc_inode = NULL;
1004                 lli->lli_pcc_dsflags = PCC_DATASET_INVALID;
1005                 lli->lli_pcc_generation = 0;
1006                 mutex_init(&lli->lli_group_mutex);
1007                 lli->lli_group_users = 0;
1008                 lli->lli_group_gid = 0;
1009         }
1010         mutex_init(&lli->lli_layout_mutex);
1011         memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
1012 }
1013
1014 #define MAX_STRING_SIZE 128
1015
1016 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1017
1018 #define LSI_BDI_INITIALIZED     0x00400000
1019
1020 #ifndef HAVE_BDI_CAP_MAP_COPY
1021 # define BDI_CAP_MAP_COPY       0
1022 #endif
1023
1024 static int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
1025 {
1026         struct  lustre_sb_info *lsi = s2lsi(sb);
1027         char buf[MAX_STRING_SIZE];
1028         va_list args;
1029         int err;
1030
1031         err = bdi_init(&lsi->lsi_bdi);
1032         if (err)
1033                 return err;
1034
1035         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1036         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1037         lsi->lsi_bdi.name = "lustre";
1038         va_start(args, fmt);
1039         vsnprintf(buf, MAX_STRING_SIZE, fmt, args);
1040         va_end(args);
1041         err = bdi_register(&lsi->lsi_bdi, NULL, "%s", buf);
1042         va_end(args);
1043         if (!err)
1044                 sb->s_bdi = &lsi->lsi_bdi;
1045
1046         return err;
1047 }
1048 #endif /* !HAVE_SUPER_SETUP_BDI_NAME */
1049
1050 int ll_fill_super(struct super_block *sb)
1051 {
1052         struct  lustre_profile *lprof = NULL;
1053         struct  lustre_sb_info *lsi = s2lsi(sb);
1054         struct  ll_sb_info *sbi = NULL;
1055         char    *dt = NULL, *md = NULL;
1056         char    *profilenm = get_profile_name(sb);
1057         struct config_llog_instance *cfg;
1058         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
1059         const int instlen = LUSTRE_MAXINSTANCE + 2;
1060         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1061         char name[MAX_STRING_SIZE];
1062         int md_len = 0;
1063         int dt_len = 0;
1064         uuid_t uuid;
1065         char *ptr;
1066         int len;
1067         int err;
1068
1069         ENTRY;
1070         /* for ASLR, to map between cfg_instance and hashed ptr */
1071         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1072                profilenm, cfg_instance, sb);
1073
1074         OBD_ALLOC_PTR(cfg);
1075         if (cfg == NULL)
1076                 GOTO(out_free_cfg, err = -ENOMEM);
1077
1078         /* client additional sb info */
1079         lsi->lsi_llsbi = sbi = ll_init_sbi();
1080         if (IS_ERR(sbi))
1081                 GOTO(out_free_cfg, err = PTR_ERR(sbi));
1082
1083         err = ll_options(lsi->lsi_lmd->lmd_opts, sbi);
1084         if (err)
1085                 GOTO(out_free_cfg, err);
1086
1087         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1088         sb->s_d_op = &ll_d_ops;
1089
1090         /* UUID handling */
1091         generate_random_uuid(uuid.b);
1092         snprintf(sbi->ll_sb_uuid.uuid, UUID_SIZE, "%pU", uuid.b);
1093
1094         CDEBUG(D_CONFIG, "llite sb uuid: %s\n", sbi->ll_sb_uuid.uuid);
1095
1096         /* Get fsname */
1097         len = strlen(profilenm);
1098         ptr = strrchr(profilenm, '-');
1099         if (ptr && (strcmp(ptr, "-client") == 0))
1100                 len -= 7;
1101
1102         if (len > LUSTRE_MAXFSNAME) {
1103                 if (unlikely(len >= MAX_STRING_SIZE))
1104                         len = MAX_STRING_SIZE - 1;
1105                 strncpy(name, profilenm, len);
1106                 name[len] = '\0';
1107                 err = -ENAMETOOLONG;
1108                 CERROR("%s: fsname longer than %u characters: rc = %d\n",
1109                        name, LUSTRE_MAXFSNAME, err);
1110                 GOTO(out_free_cfg, err);
1111         }
1112         strncpy(sbi->ll_fsname, profilenm, len);
1113         sbi->ll_fsname[len] = '\0';
1114
1115         /* Mount info */
1116         snprintf(name, sizeof(name), "%.*s-%016lx", len,
1117                  profilenm, cfg_instance);
1118
1119         err = super_setup_bdi_name(sb, "%s", name);
1120         if (err)
1121                 GOTO(out_free_cfg, err);
1122
1123         /* Call ll_debugfs_register_super() before lustre_process_log()
1124          * so that "llite.*.*" params can be processed correctly.
1125          */
1126         err = ll_debugfs_register_super(sb, name);
1127         if (err < 0) {
1128                 CERROR("%s: could not register mountpoint in llite: rc = %d\n",
1129                        sbi->ll_fsname, err);
1130                 err = 0;
1131         }
1132
1133         /* The cfg_instance is a value unique to this super, in case some
1134          * joker tries to mount the same fs at two mount points.
1135          */
1136         cfg->cfg_instance = cfg_instance;
1137         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1138         cfg->cfg_callback = class_config_llog_handler;
1139         cfg->cfg_sub_clds = CONFIG_SUB_CLIENT;
1140         /* set up client obds */
1141         err = lustre_process_log(sb, profilenm, cfg);
1142         if (err < 0)
1143                 GOTO(out_debugfs, err);
1144
1145         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1146         lprof = class_get_profile(profilenm);
1147         if (lprof == NULL) {
1148                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1149                                    " read from the MGS.  Does that filesystem "
1150                                    "exist?\n", profilenm);
1151                 GOTO(out_debugfs, err = -EINVAL);
1152         }
1153         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1154                lprof->lp_md, lprof->lp_dt);
1155
1156         dt_len = strlen(lprof->lp_dt) + instlen + 2;
1157         OBD_ALLOC(dt, dt_len);
1158         if (!dt)
1159                 GOTO(out_profile, err = -ENOMEM);
1160         snprintf(dt, dt_len - 1, "%s-%016lx", lprof->lp_dt, cfg_instance);
1161
1162         md_len = strlen(lprof->lp_md) + instlen + 2;
1163         OBD_ALLOC(md, md_len);
1164         if (!md)
1165                 GOTO(out_free_dt, err = -ENOMEM);
1166         snprintf(md, md_len - 1, "%s-%016lx", lprof->lp_md, cfg_instance);
1167
1168         /* connections, registrations, sb setup */
1169         err = client_common_fill_super(sb, md, dt);
1170         if (err < 0)
1171                 GOTO(out_free_md, err);
1172
1173         sbi->ll_client_common_fill_super_succeeded = 1;
1174
1175 out_free_md:
1176         if (md)
1177                 OBD_FREE(md, md_len);
1178 out_free_dt:
1179         if (dt)
1180                 OBD_FREE(dt, dt_len);
1181 out_profile:
1182         if (lprof)
1183                 class_put_profile(lprof);
1184 out_debugfs:
1185         if (err < 0)
1186                 ll_debugfs_unregister_super(sb);
1187 out_free_cfg:
1188         if (cfg)
1189                 OBD_FREE_PTR(cfg);
1190
1191         if (err)
1192                 ll_put_super(sb);
1193         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1194                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1195         RETURN(err);
1196 } /* ll_fill_super */
1197
1198 void ll_put_super(struct super_block *sb)
1199 {
1200         struct config_llog_instance cfg, params_cfg;
1201         struct obd_device *obd;
1202         struct lustre_sb_info *lsi = s2lsi(sb);
1203         struct ll_sb_info *sbi = ll_s2sbi(sb);
1204         char *profilenm = get_profile_name(sb);
1205         unsigned long cfg_instance = ll_get_cfg_instance(sb);
1206         long ccc_count;
1207         int next, force = 1, rc = 0;
1208         ENTRY;
1209
1210         if (IS_ERR(sbi))
1211                 GOTO(out_no_sbi, 0);
1212
1213         /* Should replace instance_id with something better for ASLR */
1214         CDEBUG(D_VFSTRACE, "VFS Op: cfg_instance %s-%016lx (sb %p)\n",
1215                profilenm, cfg_instance, sb);
1216
1217         cfg.cfg_instance = cfg_instance;
1218         lustre_end_log(sb, profilenm, &cfg);
1219
1220         params_cfg.cfg_instance = cfg_instance;
1221         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1222
1223         if (sbi->ll_md_exp) {
1224                 obd = class_exp2obd(sbi->ll_md_exp);
1225                 if (obd)
1226                         force = obd->obd_force;
1227         }
1228
1229         /* Wait for unstable pages to be committed to stable storage */
1230         if (force == 0) {
1231                 rc = l_wait_event_abortable(
1232                         sbi->ll_cache->ccc_unstable_waitq,
1233                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0);
1234         }
1235
1236         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1237         if (force == 0 && rc != -ERESTARTSYS)
1238                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1239
1240         /* We need to set force before the lov_disconnect in
1241          * lustre_common_put_super, since l_d cleans up osc's as well.
1242          */
1243         if (force) {
1244                 next = 0;
1245                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1246                                                      &next)) != NULL) {
1247                         obd->obd_force = force;
1248                 }
1249         }
1250
1251         if (sbi->ll_client_common_fill_super_succeeded) {
1252                 /* Only if client_common_fill_super succeeded */
1253                 client_common_put_super(sb);
1254         }
1255
1256         next = 0;
1257         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1258                 class_manual_cleanup(obd);
1259
1260         if (sbi->ll_flags & LL_SBI_VERBOSE)
1261                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1262
1263         if (profilenm)
1264                 class_del_profile(profilenm);
1265
1266 #ifndef HAVE_SUPER_SETUP_BDI_NAME
1267         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1268                 bdi_destroy(&lsi->lsi_bdi);
1269                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1270         }
1271 #endif
1272
1273         ll_free_sbi(sb);
1274         lsi->lsi_llsbi = NULL;
1275 out_no_sbi:
1276         lustre_common_put_super(sb);
1277
1278         cl_env_cache_purge(~0);
1279
1280         module_put(THIS_MODULE);
1281
1282         EXIT;
1283 } /* client_put_super */
1284
1285 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1286 {
1287         struct inode *inode = NULL;
1288
1289         /* NOTE: we depend on atomic igrab() -bzzz */
1290         lock_res_and_lock(lock);
1291         if (lock->l_resource->lr_lvb_inode) {
1292                 struct ll_inode_info * lli;
1293                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1294                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1295                         inode = igrab(lock->l_resource->lr_lvb_inode);
1296                 } else {
1297                         inode = lock->l_resource->lr_lvb_inode;
1298                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1299                                          D_WARNING, lock, "lr_lvb_inode %p is "
1300                                          "bogus: magic %08x",
1301                                          lock->l_resource->lr_lvb_inode,
1302                                          lli->lli_inode_magic);
1303                         inode = NULL;
1304                 }
1305         }
1306         unlock_res_and_lock(lock);
1307         return inode;
1308 }
1309
1310 void ll_dir_clear_lsm_md(struct inode *inode)
1311 {
1312         struct ll_inode_info *lli = ll_i2info(inode);
1313
1314         LASSERT(S_ISDIR(inode->i_mode));
1315
1316         if (lli->lli_lsm_md) {
1317                 lmv_free_memmd(lli->lli_lsm_md);
1318                 lli->lli_lsm_md = NULL;
1319         }
1320
1321         if (lli->lli_default_lsm_md) {
1322                 lmv_free_memmd(lli->lli_default_lsm_md);
1323                 lli->lli_default_lsm_md = NULL;
1324         }
1325 }
1326
1327 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1328                                       const struct lu_fid *fid,
1329                                       struct lustre_md *md)
1330 {
1331         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1332         struct mdt_body         *body = md->body;
1333         struct inode            *inode;
1334         ino_t                   ino;
1335         ENTRY;
1336
1337         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1338         inode = iget_locked(sb, ino);
1339         if (inode == NULL) {
1340                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1341                        sbi->ll_fsname, PFID(fid));
1342                 RETURN(ERR_PTR(-ENOENT));
1343         }
1344
1345         if (inode->i_state & I_NEW) {
1346                 struct ll_inode_info *lli = ll_i2info(inode);
1347                 struct lmv_stripe_md *lsm = md->lmv;
1348
1349                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1350                                 (body->mbo_mode & S_IFMT);
1351                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1352                          PFID(fid));
1353
1354                 inode->i_mtime.tv_sec = 0;
1355                 inode->i_atime.tv_sec = 0;
1356                 inode->i_ctime.tv_sec = 0;
1357                 inode->i_rdev = 0;
1358
1359 #ifdef HAVE_BACKING_DEV_INFO
1360                 /* initializing backing dev info. */
1361                 inode->i_mapping->backing_dev_info =
1362                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1363 #endif
1364                 inode->i_op = &ll_dir_inode_operations;
1365                 inode->i_fop = &ll_dir_operations;
1366                 lli->lli_fid = *fid;
1367                 ll_lli_init(lli);
1368
1369                 LASSERT(lsm != NULL);
1370                 /* master object FID */
1371                 lli->lli_pfid = body->mbo_fid1;
1372                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1373                        lli, PFID(fid), PFID(&lli->lli_pfid));
1374                 unlock_new_inode(inode);
1375         }
1376
1377         RETURN(inode);
1378 }
1379
1380 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1381 {
1382         struct lu_fid *fid;
1383         struct lmv_stripe_md *lsm = md->lmv;
1384         struct ll_inode_info *lli = ll_i2info(inode);
1385         int i;
1386
1387         LASSERT(lsm != NULL);
1388
1389         CDEBUG(D_INODE, "%s: "DFID" set dir layout:\n",
1390                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1391         lsm_md_dump(D_INODE, lsm);
1392
1393         if (!lmv_dir_striped(lsm))
1394                 goto out;
1395
1396         /* XXX sigh, this lsm_root initialization should be in
1397          * LMV layer, but it needs ll_iget right now, so we
1398          * put this here right now. */
1399         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1400                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1401                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1402
1403                 if (!fid_is_sane(fid))
1404                         continue;
1405
1406                 /* Unfortunately ll_iget will call ll_update_inode,
1407                  * where the initialization of slave inode is slightly
1408                  * different, so it reset lsm_md to NULL to avoid
1409                  * initializing lsm for slave inode. */
1410                 lsm->lsm_md_oinfo[i].lmo_root =
1411                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1412                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1413                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1414
1415                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1416                         while (i-- > 0) {
1417                                 iput(lsm->lsm_md_oinfo[i].lmo_root);
1418                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1419                         }
1420                         return rc;
1421                 }
1422         }
1423 out:
1424         lli->lli_lsm_md = lsm;
1425
1426         return 0;
1427 }
1428
1429 static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
1430 {
1431         struct ll_inode_info *lli = ll_i2info(inode);
1432
1433         if (!md->default_lmv) {
1434                 /* clear default lsm */
1435                 if (lli->lli_default_lsm_md) {
1436                         down_write(&lli->lli_lsm_sem);
1437                         if (lli->lli_default_lsm_md) {
1438                                 lmv_free_memmd(lli->lli_default_lsm_md);
1439                                 lli->lli_default_lsm_md = NULL;
1440                         }
1441                         up_write(&lli->lli_lsm_sem);
1442                 }
1443         } else if (lli->lli_default_lsm_md) {
1444                 /* update default lsm if it changes */
1445                 down_read(&lli->lli_lsm_sem);
1446                 if (lli->lli_default_lsm_md &&
1447                     !lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
1448                         up_read(&lli->lli_lsm_sem);
1449                         down_write(&lli->lli_lsm_sem);
1450                         if (lli->lli_default_lsm_md)
1451                                 lmv_free_memmd(lli->lli_default_lsm_md);
1452                         lli->lli_default_lsm_md = md->default_lmv;
1453                         lsm_md_dump(D_INODE, md->default_lmv);
1454                         md->default_lmv = NULL;
1455                         up_write(&lli->lli_lsm_sem);
1456                 } else {
1457                         up_read(&lli->lli_lsm_sem);
1458                 }
1459         } else {
1460                 /* init default lsm */
1461                 down_write(&lli->lli_lsm_sem);
1462                 lli->lli_default_lsm_md = md->default_lmv;
1463                 lsm_md_dump(D_INODE, md->default_lmv);
1464                 md->default_lmv = NULL;
1465                 up_write(&lli->lli_lsm_sem);
1466         }
1467 }
1468
1469 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1470 {
1471         struct ll_inode_info *lli = ll_i2info(inode);
1472         struct lmv_stripe_md *lsm = md->lmv;
1473         struct cl_attr  *attr;
1474         int rc = 0;
1475
1476         ENTRY;
1477
1478         LASSERT(S_ISDIR(inode->i_mode));
1479         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1480                PFID(ll_inode2fid(inode)));
1481
1482         /* update default LMV */
1483         if (md->default_lmv)
1484                 ll_update_default_lsm_md(inode, md);
1485
1486         /*
1487          * no striped information from request, lustre_md from req does not
1488          * include stripeEA, see ll_md_setattr()
1489          */
1490         if (!lsm)
1491                 RETURN(0);
1492
1493         /*
1494          * normally dir layout doesn't change, only take read lock to check
1495          * that to avoid blocking other MD operations.
1496          */
1497         down_read(&lli->lli_lsm_sem);
1498
1499         /* some current lookup initialized lsm, and unchanged */
1500         if (lli->lli_lsm_md && lsm_md_eq(lli->lli_lsm_md, lsm))
1501                 GOTO(unlock, rc = 0);
1502
1503         /* if dir layout doesn't match, check whether version is increased,
1504          * which means layout is changed, this happens in dir split/merge and
1505          * lfsck.
1506          *
1507          * foreign LMV should not change.
1508          */
1509         if (lli->lli_lsm_md && lmv_dir_striped(lli->lli_lsm_md) &&
1510             lsm->lsm_md_layout_version <=
1511             lli->lli_lsm_md->lsm_md_layout_version) {
1512                 CERROR("%s: "DFID" dir layout mismatch:\n",
1513                        ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid));
1514                 lsm_md_dump(D_ERROR, lli->lli_lsm_md);
1515                 lsm_md_dump(D_ERROR, lsm);
1516                 GOTO(unlock, rc = -EINVAL);
1517         }
1518
1519         up_read(&lli->lli_lsm_sem);
1520         down_write(&lli->lli_lsm_sem);
1521         /* clear existing lsm */
1522         if (lli->lli_lsm_md) {
1523                 lmv_free_memmd(lli->lli_lsm_md);
1524                 lli->lli_lsm_md = NULL;
1525         }
1526
1527         rc = ll_init_lsm_md(inode, md);
1528         up_write(&lli->lli_lsm_sem);
1529
1530         if (rc)
1531                 RETURN(rc);
1532
1533         /* set md->lmv to NULL, so the following free lustre_md will not free
1534          * this lsm.
1535          */
1536         md->lmv = NULL;
1537
1538         /* md_merge_attr() may take long, since lsm is already set, switch to
1539          * read lock.
1540          */
1541         down_read(&lli->lli_lsm_sem);
1542
1543         if (!lmv_dir_striped(lli->lli_lsm_md))
1544                 GOTO(unlock, rc = 0);
1545
1546         OBD_ALLOC_PTR(attr);
1547         if (!attr)
1548                 GOTO(unlock, rc = -ENOMEM);
1549
1550         /* validate the lsm */
1551         rc = md_merge_attr(ll_i2mdexp(inode), lli->lli_lsm_md, attr,
1552                            ll_md_blocking_ast);
1553         if (!rc) {
1554                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1555                         md->body->mbo_nlink = attr->cat_nlink;
1556                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1557                         md->body->mbo_size = attr->cat_size;
1558                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1559                         md->body->mbo_atime = attr->cat_atime;
1560                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1561                         md->body->mbo_ctime = attr->cat_ctime;
1562                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1563                         md->body->mbo_mtime = attr->cat_mtime;
1564         }
1565
1566         OBD_FREE_PTR(attr);
1567         GOTO(unlock, rc);
1568 unlock:
1569         up_read(&lli->lli_lsm_sem);
1570
1571         return rc;
1572 }
1573
1574 void ll_clear_inode(struct inode *inode)
1575 {
1576         struct ll_inode_info *lli = ll_i2info(inode);
1577         struct ll_sb_info *sbi = ll_i2sbi(inode);
1578
1579         ENTRY;
1580
1581         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1582                PFID(ll_inode2fid(inode)), inode);
1583
1584         if (S_ISDIR(inode->i_mode)) {
1585                 /* these should have been cleared in ll_file_release */
1586                 LASSERT(lli->lli_opendir_key == NULL);
1587                 LASSERT(lli->lli_sai == NULL);
1588                 LASSERT(lli->lli_opendir_pid == 0);
1589         } else {
1590                 pcc_inode_free(inode);
1591         }
1592
1593         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1594
1595         LASSERT(!lli->lli_open_fd_write_count);
1596         LASSERT(!lli->lli_open_fd_read_count);
1597         LASSERT(!lli->lli_open_fd_exec_count);
1598
1599         if (lli->lli_mds_write_och)
1600                 ll_md_real_close(inode, FMODE_WRITE);
1601         if (lli->lli_mds_exec_och)
1602                 ll_md_real_close(inode, FMODE_EXEC);
1603         if (lli->lli_mds_read_och)
1604                 ll_md_real_close(inode, FMODE_READ);
1605
1606         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1607                 OBD_FREE(lli->lli_symlink_name,
1608                          strlen(lli->lli_symlink_name) + 1);
1609                 lli->lli_symlink_name = NULL;
1610         }
1611
1612         ll_xattr_cache_destroy(inode);
1613
1614 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
1615         forget_all_cached_acls(inode);
1616         if (lli->lli_posix_acl) {
1617                 posix_acl_release(lli->lli_posix_acl);
1618                 lli->lli_posix_acl = NULL;
1619         }
1620 #endif
1621         lli->lli_inode_magic = LLI_INODE_DEAD;
1622
1623         if (S_ISDIR(inode->i_mode))
1624                 ll_dir_clear_lsm_md(inode);
1625         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1626                 LASSERT(list_empty(&lli->lli_agl_list));
1627
1628         /*
1629          * XXX This has to be done before lsm is freed below, because
1630          * cl_object still uses inode lsm.
1631          */
1632         cl_inode_fini(inode);
1633
1634         EXIT;
1635 }
1636
1637 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1638 {
1639         struct lustre_md md;
1640         struct inode *inode = dentry->d_inode;
1641         struct ll_sb_info *sbi = ll_i2sbi(inode);
1642         struct ptlrpc_request *request = NULL;
1643         int rc, ia_valid;
1644         ENTRY;
1645
1646         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1647                                      LUSTRE_OPC_ANY, NULL);
1648         if (IS_ERR(op_data))
1649                 RETURN(PTR_ERR(op_data));
1650
1651         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1652         if (rc) {
1653                 ptlrpc_req_finished(request);
1654                 if (rc == -ENOENT) {
1655                         clear_nlink(inode);
1656                         /* Unlinked special device node? Or just a race?
1657                          * Pretend we done everything. */
1658                         if (!S_ISREG(inode->i_mode) &&
1659                             !S_ISDIR(inode->i_mode)) {
1660                                 ia_valid = op_data->op_attr.ia_valid;
1661                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1662                                 rc = simple_setattr(dentry, &op_data->op_attr);
1663                                 op_data->op_attr.ia_valid = ia_valid;
1664                         }
1665                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1666                         CERROR("md_setattr fails: rc = %d\n", rc);
1667                 }
1668                 RETURN(rc);
1669         }
1670
1671         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1672                               sbi->ll_md_exp, &md);
1673         if (rc) {
1674                 ptlrpc_req_finished(request);
1675                 RETURN(rc);
1676         }
1677
1678         ia_valid = op_data->op_attr.ia_valid;
1679         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1680          * cache is not cleared yet. */
1681         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1682         if (S_ISREG(inode->i_mode))
1683                 inode_lock(inode);
1684         rc = simple_setattr(dentry, &op_data->op_attr);
1685         if (S_ISREG(inode->i_mode))
1686                 inode_unlock(inode);
1687         op_data->op_attr.ia_valid = ia_valid;
1688
1689         rc = ll_update_inode(inode, &md);
1690         ptlrpc_req_finished(request);
1691
1692         RETURN(rc);
1693 }
1694
1695 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1696  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1697  * keep these values until such a time that objects are allocated for it.
1698  * We do the MDS operations first, as it is checking permissions for us.
1699  * We don't to the MDS RPC if there is nothing that we want to store there,
1700  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1701  * going to do an RPC anyways.
1702  *
1703  * If we are doing a truncate, we will send the mtime and ctime updates
1704  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1705  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1706  * at the same time.
1707  *
1708  * In case of HSMimport, we only set attr on MDS.
1709  */
1710 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
1711                    enum op_xvalid xvalid, bool hsm_import)
1712 {
1713         struct inode *inode = dentry->d_inode;
1714         struct ll_inode_info *lli = ll_i2info(inode);
1715         struct md_op_data *op_data = NULL;
1716         ktime_t kstart = ktime_get();
1717         int rc = 0;
1718
1719         ENTRY;
1720
1721         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1722                "valid %x, hsm_import %d\n",
1723                ll_i2sbi(inode)->ll_fsname, PFID(&lli->lli_fid),
1724                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1725                hsm_import);
1726
1727         if (attr->ia_valid & ATTR_SIZE) {
1728                 /* Check new size against VFS/VM file size limit and rlimit */
1729                 rc = inode_newsize_ok(inode, attr->ia_size);
1730                 if (rc)
1731                         RETURN(rc);
1732
1733                 /* The maximum Lustre file size is variable, based on the
1734                  * OST maximum object size and number of stripes.  This
1735                  * needs another check in addition to the VFS check above. */
1736                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1737                         CDEBUG(D_INODE,"file "DFID" too large %llu > %llu\n",
1738                                PFID(&lli->lli_fid), attr->ia_size,
1739                                ll_file_maxbytes(inode));
1740                         RETURN(-EFBIG);
1741                 }
1742
1743                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1744         }
1745
1746         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1747         if (attr->ia_valid & TIMES_SET_FLAGS) {
1748                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1749                     !cfs_capable(CFS_CAP_FOWNER))
1750                         RETURN(-EPERM);
1751         }
1752
1753         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1754         if (!(xvalid & OP_XVALID_CTIME_SET) &&
1755              (attr->ia_valid & ATTR_CTIME)) {
1756                 attr->ia_ctime = current_time(inode);
1757                 xvalid |= OP_XVALID_CTIME_SET;
1758         }
1759         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1760             (attr->ia_valid & ATTR_ATIME)) {
1761                 attr->ia_atime = current_time(inode);
1762                 attr->ia_valid |= ATTR_ATIME_SET;
1763         }
1764         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1765             (attr->ia_valid & ATTR_MTIME)) {
1766                 attr->ia_mtime = current_time(inode);
1767                 attr->ia_valid |= ATTR_MTIME_SET;
1768         }
1769
1770         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1771                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld, now = %lld\n",
1772                        (s64)attr->ia_mtime.tv_sec, (s64)attr->ia_ctime.tv_sec,
1773                        ktime_get_real_seconds());
1774
1775         if (S_ISREG(inode->i_mode))
1776                 inode_unlock(inode);
1777
1778         /* We always do an MDS RPC, even if we're only changing the size;
1779          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1780
1781         OBD_ALLOC_PTR(op_data);
1782         if (op_data == NULL)
1783                 GOTO(out, rc = -ENOMEM);
1784
1785         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1786                 /* If we are changing file size, file content is
1787                  * modified, flag it.
1788                  */
1789                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1790                 op_data->op_bias |= MDS_DATA_MODIFIED;
1791                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1792         }
1793
1794         if (attr->ia_valid & ATTR_FILE) {
1795                 struct ll_file_data *fd = attr->ia_file->private_data;
1796
1797                 if (fd->fd_lease_och)
1798                         op_data->op_bias |= MDS_TRUNC_KEEP_LEASE;
1799         }
1800
1801         op_data->op_attr = *attr;
1802         op_data->op_xvalid = xvalid;
1803
1804         rc = ll_md_setattr(dentry, op_data);
1805         if (rc)
1806                 GOTO(out, rc);
1807
1808         if (!S_ISREG(inode->i_mode) || hsm_import)
1809                 GOTO(out, rc = 0);
1810
1811         if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
1812                               ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
1813             xvalid & OP_XVALID_CTIME_SET) {
1814                 bool cached = false;
1815
1816                 rc = pcc_inode_setattr(inode, attr, &cached);
1817                 if (cached) {
1818                         if (rc) {
1819                                 CERROR("%s: PCC inode "DFID" setattr failed: "
1820                                        "rc = %d\n",
1821                                        ll_i2sbi(inode)->ll_fsname,
1822                                        PFID(&lli->lli_fid), rc);
1823                                 GOTO(out, rc);
1824                         }
1825                 } else {
1826                         /* For truncate and utimes sending attributes to OSTs,
1827                          * setting mtime/atime to the past will be performed
1828                          * under PW [0:EOF] extent lock (new_size:EOF for
1829                          * truncate). It may seem excessive to send mtime/atime
1830                          * updates to OSTs when not setting times to past, but
1831                          * it is necessary due to possible time
1832                          * de-synchronization between MDT inode and OST objects
1833                          */
1834                         rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
1835                 }
1836         }
1837
1838         /* If the file was restored, it needs to set dirty flag.
1839          *
1840          * We've already sent MDS_DATA_MODIFIED flag in
1841          * ll_md_setattr() for truncate. However, the MDT refuses to
1842          * set the HS_DIRTY flag on released files, so we have to set
1843          * it again if the file has been restored. Please check how
1844          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1845          *
1846          * Please notice that if the file is not released, the previous
1847          * MDS_DATA_MODIFIED has taken effect and usually
1848          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1849          * This way we can save an RPC for common open + trunc
1850          * operation. */
1851         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1852                 struct hsm_state_set hss = {
1853                         .hss_valid = HSS_SETMASK,
1854                         .hss_setmask = HS_DIRTY,
1855                 };
1856                 int rc2;
1857
1858                 rc2 = ll_hsm_state_set(inode, &hss);
1859                 /* truncate and write can happen at the same time, so that
1860                  * the file can be set modified even though the file is not
1861                  * restored from released state, and ll_hsm_state_set() is
1862                  * not applicable for the file, and rc2 < 0 is normal in this
1863                  * case. */
1864                 if (rc2 < 0)
1865                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1866                                PFID(ll_inode2fid(inode)), rc2);
1867         }
1868
1869         EXIT;
1870 out:
1871         if (op_data != NULL)
1872                 ll_finish_md_op_data(op_data);
1873
1874         if (S_ISREG(inode->i_mode)) {
1875                 inode_lock(inode);
1876                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1877                         inode_dio_wait(inode);
1878                 /* Once we've got the i_mutex, it's safe to set the S_NOSEC
1879                  * flag.  ll_update_inode (called from ll_md_setattr), clears
1880                  * inode flags, so there is a gap where S_NOSEC is not set.
1881                  * This can cause a writer to take the i_mutex unnecessarily,
1882                  * but this is safe to do and should be rare. */
1883                 inode_has_no_xattr(inode);
1884         }
1885
1886         if (!rc)
1887                 ll_stats_ops_tally(ll_i2sbi(inode), attr->ia_valid & ATTR_SIZE ?
1888                                         LPROC_LL_TRUNC : LPROC_LL_SETATTR,
1889                                    ktime_us_delta(ktime_get(), kstart));
1890
1891         return rc;
1892 }
1893
1894 int ll_setattr(struct dentry *de, struct iattr *attr)
1895 {
1896         int mode = de->d_inode->i_mode;
1897         enum op_xvalid xvalid = 0;
1898
1899         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1900                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1901                 xvalid |= OP_XVALID_OWNEROVERRIDE;
1902
1903         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1904                                (ATTR_SIZE|ATTR_MODE)) &&
1905             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1906              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1907               !(attr->ia_mode & S_ISGID))))
1908                 attr->ia_valid |= ATTR_FORCE;
1909
1910         if ((attr->ia_valid & ATTR_MODE) &&
1911             (mode & S_ISUID) &&
1912             !(attr->ia_mode & S_ISUID) &&
1913             !(attr->ia_valid & ATTR_KILL_SUID))
1914                 attr->ia_valid |= ATTR_KILL_SUID;
1915
1916         if ((attr->ia_valid & ATTR_MODE) &&
1917             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1918             !(attr->ia_mode & S_ISGID) &&
1919             !(attr->ia_valid & ATTR_KILL_SGID))
1920                 attr->ia_valid |= ATTR_KILL_SGID;
1921
1922         return ll_setattr_raw(de, attr, xvalid, false);
1923 }
1924
1925 int ll_statfs_internal(struct ll_sb_info *sbi, struct obd_statfs *osfs,
1926                        u32 flags)
1927 {
1928         struct obd_statfs obd_osfs = { 0 };
1929         time64_t max_age;
1930         int rc;
1931
1932         ENTRY;
1933         max_age = ktime_get_seconds() - sbi->ll_statfs_max_age;
1934
1935         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1936                 flags |= OBD_STATFS_NODELAY;
1937
1938         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1939         if (rc)
1940                 RETURN(rc);
1941
1942         osfs->os_type = LL_SUPER_MAGIC;
1943
1944         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1945               osfs->os_bavail, osfs->os_blocks, osfs->os_ffree, osfs->os_files);
1946
1947         if (osfs->os_state & OS_STATE_SUM)
1948                 GOTO(out, rc);
1949
1950         rc = obd_statfs(NULL, sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1951         if (rc) /* Possibly a filesystem with no OSTs.  Report MDT totals. */
1952                 GOTO(out, rc = 0);
1953
1954         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1955                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1956                obd_osfs.os_files);
1957
1958         osfs->os_bsize = obd_osfs.os_bsize;
1959         osfs->os_blocks = obd_osfs.os_blocks;
1960         osfs->os_bfree = obd_osfs.os_bfree;
1961         osfs->os_bavail = obd_osfs.os_bavail;
1962
1963         /* If we have _some_ OSTs, but don't have as many free objects on the
1964          * OSTs as inodes on the MDTs, reduce the reported number of inodes
1965          * to compensate, so that the "inodes in use" number is correct.
1966          * This should be kept in sync with lod_statfs() behaviour.
1967          */
1968         if (obd_osfs.os_files && obd_osfs.os_ffree < osfs->os_ffree) {
1969                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1970                                  obd_osfs.os_ffree;
1971                 osfs->os_ffree = obd_osfs.os_ffree;
1972         }
1973
1974 out:
1975         RETURN(rc);
1976 }
1977
1978 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1979 {
1980         struct super_block *sb = de->d_sb;
1981         struct obd_statfs osfs;
1982         __u64 fsid = huge_encode_dev(sb->s_dev);
1983         ktime_t kstart = ktime_get();
1984         int rc;
1985
1986         CDEBUG(D_VFSTRACE, "VFS Op:sb=%s (%p)\n", sb->s_id, sb);
1987
1988         /* Some amount of caching on the client is allowed */
1989         rc = ll_statfs_internal(ll_s2sbi(sb), &osfs, OBD_STATFS_SUM);
1990         if (rc)
1991                 return rc;
1992
1993         statfs_unpack(sfs, &osfs);
1994
1995         /* We need to downshift for all 32-bit kernels, because we can't
1996          * tell if the kernel is being called via sys_statfs64() or not.
1997          * Stop before overflowing f_bsize - in which case it is better
1998          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1999         if (sizeof(long) < 8) {
2000                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
2001                         sfs->f_bsize <<= 1;
2002
2003                         osfs.os_blocks >>= 1;
2004                         osfs.os_bfree >>= 1;
2005                         osfs.os_bavail >>= 1;
2006                 }
2007         }
2008
2009         sfs->f_blocks = osfs.os_blocks;
2010         sfs->f_bfree = osfs.os_bfree;
2011         sfs->f_bavail = osfs.os_bavail;
2012         sfs->f_fsid.val[0] = (__u32)fsid;
2013         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
2014
2015         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STATFS,
2016                            ktime_us_delta(ktime_get(), kstart));
2017
2018         return 0;
2019 }
2020
2021 void ll_inode_size_lock(struct inode *inode)
2022 {
2023         struct ll_inode_info *lli;
2024
2025         LASSERT(!S_ISDIR(inode->i_mode));
2026
2027         lli = ll_i2info(inode);
2028         mutex_lock(&lli->lli_size_mutex);
2029 }
2030
2031 void ll_inode_size_unlock(struct inode *inode)
2032 {
2033         struct ll_inode_info *lli;
2034
2035         lli = ll_i2info(inode);
2036         mutex_unlock(&lli->lli_size_mutex);
2037 }
2038
2039 void ll_update_inode_flags(struct inode *inode, int ext_flags)
2040 {
2041         inode->i_flags = ll_ext_to_inode_flags(ext_flags);
2042         if (ext_flags & LUSTRE_PROJINHERIT_FL)
2043                 ll_file_set_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
2044         else
2045                 ll_file_clear_flag(ll_i2info(inode), LLIF_PROJECT_INHERIT);
2046 }
2047
2048 int ll_update_inode(struct inode *inode, struct lustre_md *md)
2049 {
2050         struct ll_inode_info *lli = ll_i2info(inode);
2051         struct mdt_body *body = md->body;
2052         struct ll_sb_info *sbi = ll_i2sbi(inode);
2053         int rc = 0;
2054
2055         if (body->mbo_valid & OBD_MD_FLEASIZE) {
2056                 rc = cl_file_inode_init(inode, md);
2057                 if (rc)
2058                         return rc;
2059         }
2060
2061         if (S_ISDIR(inode->i_mode)) {
2062                 rc = ll_update_lsm_md(inode, md);
2063                 if (rc != 0)
2064                         return rc;
2065         }
2066
2067 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2068         if (body->mbo_valid & OBD_MD_FLACL) {
2069                 spin_lock(&lli->lli_lock);
2070                 if (lli->lli_posix_acl)
2071                         posix_acl_release(lli->lli_posix_acl);
2072                 lli->lli_posix_acl = md->posix_acl;
2073                 spin_unlock(&lli->lli_lock);
2074         }
2075 #endif
2076         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
2077                                         sbi->ll_flags & LL_SBI_32BIT_API);
2078         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
2079
2080         if (body->mbo_valid & OBD_MD_FLATIME) {
2081                 if (body->mbo_atime > inode->i_atime.tv_sec)
2082                         inode->i_atime.tv_sec = body->mbo_atime;
2083                 lli->lli_atime = body->mbo_atime;
2084         }
2085
2086         if (body->mbo_valid & OBD_MD_FLMTIME) {
2087                 if (body->mbo_mtime > inode->i_mtime.tv_sec) {
2088                         CDEBUG(D_INODE,
2089                                "setting ino %lu mtime from %lld to %llu\n",
2090                                inode->i_ino, (s64)inode->i_mtime.tv_sec,
2091                                body->mbo_mtime);
2092                         inode->i_mtime.tv_sec = body->mbo_mtime;
2093                 }
2094                 lli->lli_mtime = body->mbo_mtime;
2095         }
2096
2097         if (body->mbo_valid & OBD_MD_FLCTIME) {
2098                 if (body->mbo_ctime > inode->i_ctime.tv_sec)
2099                         inode->i_ctime.tv_sec = body->mbo_ctime;
2100                 lli->lli_ctime = body->mbo_ctime;
2101         }
2102
2103         /* Clear i_flags to remove S_NOSEC before permissions are updated */
2104         if (body->mbo_valid & OBD_MD_FLFLAGS)
2105                 ll_update_inode_flags(inode, body->mbo_flags);
2106         if (body->mbo_valid & OBD_MD_FLMODE)
2107                 inode->i_mode = (inode->i_mode & S_IFMT) |
2108                                 (body->mbo_mode & ~S_IFMT);
2109
2110         if (body->mbo_valid & OBD_MD_FLTYPE)
2111                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
2112                                 (body->mbo_mode & S_IFMT);
2113
2114         LASSERT(inode->i_mode != 0);
2115         if (S_ISREG(inode->i_mode))
2116                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
2117                                        LL_MAX_BLKSIZE_BITS);
2118         else
2119                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2120
2121         if (body->mbo_valid & OBD_MD_FLUID)
2122                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
2123         if (body->mbo_valid & OBD_MD_FLGID)
2124                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
2125         if (body->mbo_valid & OBD_MD_FLPROJID)
2126                 lli->lli_projid = body->mbo_projid;
2127         if (body->mbo_valid & OBD_MD_FLNLINK)
2128                 set_nlink(inode, body->mbo_nlink);
2129         if (body->mbo_valid & OBD_MD_FLRDEV)
2130                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
2131
2132         if (body->mbo_valid & OBD_MD_FLID) {
2133                 /* FID shouldn't be changed! */
2134                 if (fid_is_sane(&lli->lli_fid)) {
2135                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
2136                                  "Trying to change FID "DFID
2137                                  " to the "DFID", inode "DFID"(%p)\n",
2138                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
2139                                  PFID(ll_inode2fid(inode)), inode);
2140                 } else {
2141                         lli->lli_fid = body->mbo_fid1;
2142                 }
2143         }
2144
2145         LASSERT(fid_seq(&lli->lli_fid) != 0);
2146
2147         if (body->mbo_valid & OBD_MD_FLSIZE) {
2148                 i_size_write(inode, body->mbo_size);
2149
2150                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
2151                        PFID(ll_inode2fid(inode)),
2152                        (unsigned long long)body->mbo_size);
2153
2154                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
2155                         inode->i_blocks = body->mbo_blocks;
2156         }
2157
2158         if (body->mbo_valid & OBD_MD_TSTATE) {
2159                 /* Set LLIF_FILE_RESTORING if restore ongoing and
2160                  * clear it when done to ensure to start again
2161                  * glimpsing updated attrs
2162                  */
2163                 if (body->mbo_t_state & MS_RESTORE)
2164                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
2165                 else
2166                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
2167         }
2168
2169         return 0;
2170 }
2171
2172 int ll_read_inode2(struct inode *inode, void *opaque)
2173 {
2174         struct lustre_md *md = opaque;
2175         struct ll_inode_info *lli = ll_i2info(inode);
2176         int     rc;
2177         ENTRY;
2178
2179         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2180                PFID(&lli->lli_fid), inode);
2181
2182         /* Core attributes from the MDS first.  This is a new inode, and
2183          * the VFS doesn't zero times in the core inode so we have to do
2184          * it ourselves.  They will be overwritten by either MDS or OST
2185          * attributes - we just need to make sure they aren't newer.
2186          */
2187         inode->i_mtime.tv_sec = 0;
2188         inode->i_atime.tv_sec = 0;
2189         inode->i_ctime.tv_sec = 0;
2190         inode->i_rdev = 0;
2191         rc = ll_update_inode(inode, md);
2192         if (rc != 0)
2193                 RETURN(rc);
2194
2195         /* OIDEBUG(inode); */
2196
2197 #ifdef HAVE_BACKING_DEV_INFO
2198         /* initializing backing dev info. */
2199         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2200 #endif
2201         if (S_ISREG(inode->i_mode)) {
2202                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2203                 inode->i_op = &ll_file_inode_operations;
2204                 inode->i_fop = sbi->ll_fop;
2205                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2206                 EXIT;
2207         } else if (S_ISDIR(inode->i_mode)) {
2208                 inode->i_op = &ll_dir_inode_operations;
2209                 inode->i_fop = &ll_dir_operations;
2210                 EXIT;
2211         } else if (S_ISLNK(inode->i_mode)) {
2212                 inode->i_op = &ll_fast_symlink_inode_operations;
2213                 EXIT;
2214         } else {
2215                 inode->i_op = &ll_special_inode_operations;
2216
2217                 init_special_inode(inode, inode->i_mode,
2218                                    inode->i_rdev);
2219
2220                 EXIT;
2221         }
2222
2223         return 0;
2224 }
2225
2226 void ll_delete_inode(struct inode *inode)
2227 {
2228         struct ll_inode_info *lli = ll_i2info(inode);
2229         struct address_space *mapping = &inode->i_data;
2230         unsigned long nrpages;
2231         unsigned long flags;
2232
2233         ENTRY;
2234
2235         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL) {
2236                 /* It is last chance to write out dirty pages,
2237                  * otherwise we may lose data while umount.
2238                  *
2239                  * If i_nlink is 0 then just discard data. This is safe because
2240                  * local inode gets i_nlink 0 from server only for the last
2241                  * unlink, so that file is not opened somewhere else
2242                  */
2243                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, inode->i_nlink ?
2244                                    CL_FSYNC_LOCAL : CL_FSYNC_DISCARD, 1);
2245         }
2246         truncate_inode_pages_final(mapping);
2247
2248         /* Workaround for LU-118: Note nrpages may not be totally updated when
2249          * truncate_inode_pages() returns, as there can be a page in the process
2250          * of deletion (inside __delete_from_page_cache()) in the specified
2251          * range. Thus mapping->nrpages can be non-zero when this function
2252          * returns even after truncation of the whole mapping.  Only do this if
2253          * npages isn't already zero.
2254          */
2255         nrpages = mapping->nrpages;
2256         if (nrpages) {
2257                 xa_lock_irqsave(&mapping->i_pages, flags);
2258                 nrpages = mapping->nrpages;
2259                 xa_unlock_irqrestore(&mapping->i_pages, flags);
2260         } /* Workaround end */
2261
2262         LASSERTF(nrpages == 0, "%s: inode="DFID"(%p) nrpages=%lu, "
2263                  "see https://jira.whamcloud.com/browse/LU-118\n",
2264                  ll_i2sbi(inode)->ll_fsname,
2265                  PFID(ll_inode2fid(inode)), inode, nrpages);
2266
2267         ll_clear_inode(inode);
2268         clear_inode(inode);
2269
2270         EXIT;
2271 }
2272
2273 int ll_iocontrol(struct inode *inode, struct file *file,
2274                  unsigned int cmd, unsigned long arg)
2275 {
2276         struct ll_sb_info *sbi = ll_i2sbi(inode);
2277         struct ptlrpc_request *req = NULL;
2278         int rc, flags = 0;
2279         ENTRY;
2280
2281         switch (cmd) {
2282         case FS_IOC_GETFLAGS: {
2283                 struct mdt_body *body;
2284                 struct md_op_data *op_data;
2285
2286                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2287                                              0, 0, LUSTRE_OPC_ANY,
2288                                              NULL);
2289                 if (IS_ERR(op_data))
2290                         RETURN(PTR_ERR(op_data));
2291
2292                 op_data->op_valid = OBD_MD_FLFLAGS;
2293                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2294                 ll_finish_md_op_data(op_data);
2295                 if (rc) {
2296                         CERROR("%s: failure inode "DFID": rc = %d\n",
2297                                sbi->ll_md_exp->exp_obd->obd_name,
2298                                PFID(ll_inode2fid(inode)), rc);
2299                         RETURN(-abs(rc));
2300                 }
2301
2302                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2303
2304                 flags = body->mbo_flags;
2305
2306                 ptlrpc_req_finished(req);
2307
2308                 RETURN(put_user(flags, (int __user *)arg));
2309         }
2310         case FS_IOC_SETFLAGS: {
2311                 struct iattr *attr;
2312                 struct md_op_data *op_data;
2313                 struct cl_object *obj;
2314                 struct fsxattr fa = { 0 };
2315
2316                 if (get_user(flags, (int __user *)arg))
2317                         RETURN(-EFAULT);
2318
2319                 fa.fsx_projid = ll_i2info(inode)->lli_projid;
2320                 if (flags & LUSTRE_PROJINHERIT_FL)
2321                         fa.fsx_xflags = FS_XFLAG_PROJINHERIT;
2322
2323                 rc = ll_ioctl_check_project(inode, &fa);
2324                 if (rc)
2325                         RETURN(rc);
2326
2327                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2328                                              LUSTRE_OPC_ANY, NULL);
2329                 if (IS_ERR(op_data))
2330                         RETURN(PTR_ERR(op_data));
2331
2332                 op_data->op_attr_flags = flags;
2333                 op_data->op_xvalid |= OP_XVALID_FLAGS;
2334                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2335                 ll_finish_md_op_data(op_data);
2336                 ptlrpc_req_finished(req);
2337                 if (rc)
2338                         RETURN(rc);
2339
2340                 ll_update_inode_flags(inode, flags);
2341
2342                 obj = ll_i2info(inode)->lli_clob;
2343                 if (obj == NULL)
2344                         RETURN(0);
2345
2346                 OBD_ALLOC_PTR(attr);
2347                 if (attr == NULL)
2348                         RETURN(-ENOMEM);
2349
2350                 rc = cl_setattr_ost(obj, attr, OP_XVALID_FLAGS, flags);
2351
2352                 OBD_FREE_PTR(attr);
2353                 RETURN(rc);
2354         }
2355         default:
2356                 RETURN(-ENOSYS);
2357         }
2358
2359         RETURN(0);
2360 }
2361
2362 int ll_flush_ctx(struct inode *inode)
2363 {
2364         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2365
2366         CDEBUG(D_SEC, "flush context for user %d\n",
2367                from_kuid(&init_user_ns, current_uid()));
2368
2369         obd_set_info_async(NULL, sbi->ll_md_exp,
2370                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2371                            0, NULL, NULL);
2372         obd_set_info_async(NULL, sbi->ll_dt_exp,
2373                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2374                            0, NULL, NULL);
2375         return 0;
2376 }
2377
2378 /* umount -f client means force down, don't save state */
2379 void ll_umount_begin(struct super_block *sb)
2380 {
2381         struct ll_sb_info *sbi = ll_s2sbi(sb);
2382         struct obd_device *obd;
2383         struct obd_ioctl_data *ioc_data;
2384         int cnt;
2385         ENTRY;
2386
2387         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2388                sb->s_count, atomic_read(&sb->s_active));
2389
2390         obd = class_exp2obd(sbi->ll_md_exp);
2391         if (obd == NULL) {
2392                 CERROR("Invalid MDC connection handle %#llx\n",
2393                        sbi->ll_md_exp->exp_handle.h_cookie);
2394                 EXIT;
2395                 return;
2396         }
2397         obd->obd_force = 1;
2398
2399         obd = class_exp2obd(sbi->ll_dt_exp);
2400         if (obd == NULL) {
2401                 CERROR("Invalid LOV connection handle %#llx\n",
2402                        sbi->ll_dt_exp->exp_handle.h_cookie);
2403                 EXIT;
2404                 return;
2405         }
2406         obd->obd_force = 1;
2407
2408         OBD_ALLOC_PTR(ioc_data);
2409         if (ioc_data) {
2410                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2411                               sizeof *ioc_data, ioc_data, NULL);
2412
2413                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2414                               sizeof *ioc_data, ioc_data, NULL);
2415
2416                 OBD_FREE_PTR(ioc_data);
2417         }
2418
2419         /* Really, we'd like to wait until there are no requests outstanding,
2420          * and then continue.  For now, we just periodically checking for vfs
2421          * to decrement mnt_cnt and hope to finish it within 10sec.
2422          */
2423         cnt = 10;
2424         while (cnt > 0 &&
2425                !may_umount(sbi->ll_mnt.mnt)) {
2426                 ssleep(1);
2427                 cnt -= 1;
2428         }
2429
2430         EXIT;
2431 }
2432
2433 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2434 {
2435         struct ll_sb_info *sbi = ll_s2sbi(sb);
2436         char *profilenm = get_profile_name(sb);
2437         int err;
2438         __u32 read_only;
2439
2440         if ((*flags & MS_RDONLY) != (sb->s_flags & SB_RDONLY)) {
2441                 read_only = *flags & MS_RDONLY;
2442                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2443                                          sizeof(KEY_READ_ONLY),
2444                                          KEY_READ_ONLY, sizeof(read_only),
2445                                          &read_only, NULL);
2446                 if (err) {
2447                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2448                                       profilenm, read_only ?
2449                                       "read-only" : "read-write", err);
2450                         return err;
2451                 }
2452
2453                 if (read_only)
2454                         sb->s_flags |= SB_RDONLY;
2455                 else
2456                         sb->s_flags &= ~SB_RDONLY;
2457
2458                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2459                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2460                                       read_only ?  "read-only" : "read-write");
2461         }
2462         return 0;
2463 }
2464
2465 /**
2466  * Cleanup the open handle that is cached on MDT-side.
2467  *
2468  * For open case, the client side open handling thread may hit error
2469  * after the MDT grant the open. Under such case, the client should
2470  * send close RPC to the MDT as cleanup; otherwise, the open handle
2471  * on the MDT will be leaked there until the client umount or evicted.
2472  *
2473  * In further, if someone unlinked the file, because the open handle
2474  * holds the reference on such file/object, then it will block the
2475  * subsequent threads that want to locate such object via FID.
2476  *
2477  * \param[in] sb        super block for this file-system
2478  * \param[in] open_req  pointer to the original open request
2479  */
2480 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2481 {
2482         struct mdt_body                 *body;
2483         struct md_op_data               *op_data;
2484         struct ptlrpc_request           *close_req = NULL;
2485         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2486         ENTRY;
2487
2488         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2489         OBD_ALLOC_PTR(op_data);
2490         if (op_data == NULL) {
2491                 CWARN("%s: cannot allocate op_data to release open handle for "
2492                       DFID"\n", ll_s2sbi(sb)->ll_fsname, PFID(&body->mbo_fid1));
2493
2494                 RETURN_EXIT;
2495         }
2496
2497         op_data->op_fid1 = body->mbo_fid1;
2498         op_data->op_open_handle = body->mbo_open_handle;
2499         op_data->op_mod_time = ktime_get_real_seconds();
2500         md_close(exp, op_data, NULL, &close_req);
2501         ptlrpc_req_finished(close_req);
2502         ll_finish_md_op_data(op_data);
2503
2504         EXIT;
2505 }
2506
2507 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2508                   struct super_block *sb, struct lookup_intent *it)
2509 {
2510         struct ll_sb_info *sbi = NULL;
2511         struct lustre_md md = { NULL };
2512         bool default_lmv_deleted = false;
2513         int rc;
2514
2515         ENTRY;
2516
2517         LASSERT(*inode || sb);
2518         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2519         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2520                               sbi->ll_md_exp, &md);
2521         if (rc != 0)
2522                 GOTO(out, rc);
2523
2524         /*
2525          * clear default_lmv only if intent_getattr reply doesn't contain it.
2526          * but it needs to be done after iget, check this early because
2527          * ll_update_lsm_md() may change md.
2528          */
2529         if (it && (it->it_op & (IT_LOOKUP | IT_GETATTR)) &&
2530             S_ISDIR(md.body->mbo_mode) && !md.default_lmv)
2531                 default_lmv_deleted = true;
2532
2533         if (*inode) {
2534                 rc = ll_update_inode(*inode, &md);
2535                 if (rc != 0)
2536                         GOTO(out, rc);
2537         } else {
2538                 LASSERT(sb != NULL);
2539
2540                 /*
2541                  * At this point server returns to client's same fid as client
2542                  * generated for creating. So using ->fid1 is okay here.
2543                  */
2544                 if (!fid_is_sane(&md.body->mbo_fid1)) {
2545                         CERROR("%s: Fid is insane "DFID"\n",
2546                                 sbi->ll_fsname,
2547                                 PFID(&md.body->mbo_fid1));
2548                         GOTO(out, rc = -EINVAL);
2549                 }
2550
2551                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2552                                              sbi->ll_flags & LL_SBI_32BIT_API),
2553                                  &md);
2554                 if (IS_ERR(*inode)) {
2555 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2556                         if (md.posix_acl) {
2557                                 posix_acl_release(md.posix_acl);
2558                                 md.posix_acl = NULL;
2559                         }
2560 #endif
2561                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2562                         *inode = NULL;
2563                         CERROR("new_inode -fatal: rc %d\n", rc);
2564                         GOTO(out, rc);
2565                 }
2566         }
2567
2568         /* Handling piggyback layout lock.
2569          * Layout lock can be piggybacked by getattr and open request.
2570          * The lsm can be applied to inode only if it comes with a layout lock
2571          * otherwise correct layout may be overwritten, for example:
2572          * 1. proc1: mdt returns a lsm but not granting layout
2573          * 2. layout was changed by another client
2574          * 3. proc2: refresh layout and layout lock granted
2575          * 4. proc1: to apply a stale layout */
2576         if (it != NULL && it->it_lock_mode != 0) {
2577                 struct lustre_handle lockh;
2578                 struct ldlm_lock *lock;
2579
2580                 lockh.cookie = it->it_lock_handle;
2581                 lock = ldlm_handle2lock(&lockh);
2582                 LASSERT(lock != NULL);
2583                 if (ldlm_has_layout(lock)) {
2584                         struct cl_object_conf conf;
2585
2586                         memset(&conf, 0, sizeof(conf));
2587                         conf.coc_opc = OBJECT_CONF_SET;
2588                         conf.coc_inode = *inode;
2589                         conf.coc_lock = lock;
2590                         conf.u.coc_layout = md.layout;
2591                         (void)ll_layout_conf(*inode, &conf);
2592                 }
2593                 LDLM_LOCK_PUT(lock);
2594         }
2595
2596         if (default_lmv_deleted)
2597                 ll_update_default_lsm_md(*inode, &md);
2598
2599         GOTO(out, rc = 0);
2600
2601 out:
2602         /* cleanup will be done if necessary */
2603         md_free_lustre_md(sbi->ll_md_exp, &md);
2604
2605         if (rc != 0 && it != NULL && it->it_op & IT_OPEN) {
2606                 ll_intent_drop_lock(it);
2607                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2608         }
2609
2610         return rc;
2611 }
2612
2613 int ll_obd_statfs(struct inode *inode, void __user *arg)
2614 {
2615         struct ll_sb_info *sbi = NULL;
2616         struct obd_export *exp;
2617         char *buf = NULL;
2618         struct obd_ioctl_data *data = NULL;
2619         __u32 type;
2620         int len = 0, rc;
2621
2622         if (!inode || !(sbi = ll_i2sbi(inode)))
2623                 GOTO(out_statfs, rc = -EINVAL);
2624
2625         rc = obd_ioctl_getdata(&buf, &len, arg);
2626         if (rc)
2627                 GOTO(out_statfs, rc);
2628
2629         data = (void*)buf;
2630         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2631             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2632                 GOTO(out_statfs, rc = -EINVAL);
2633
2634         if (data->ioc_inllen1 != sizeof(__u32) ||
2635             data->ioc_inllen2 != sizeof(__u32) ||
2636             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2637             data->ioc_plen2 != sizeof(struct obd_uuid))
2638                 GOTO(out_statfs, rc = -EINVAL);
2639
2640         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2641         if (type & LL_STATFS_LMV)
2642                 exp = sbi->ll_md_exp;
2643         else if (type & LL_STATFS_LOV)
2644                 exp = sbi->ll_dt_exp;
2645         else
2646                 GOTO(out_statfs, rc = -ENODEV);
2647
2648         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2649         if (rc)
2650                 GOTO(out_statfs, rc);
2651 out_statfs:
2652         OBD_FREE_LARGE(buf, len);
2653         return rc;
2654 }
2655
2656 /*
2657  * this is normally called in ll_fini_md_op_data(), but sometimes it needs to
2658  * be called early to avoid deadlock.
2659  */
2660 void ll_unlock_md_op_lsm(struct md_op_data *op_data)
2661 {
2662         if (op_data->op_mea2_sem) {
2663                 up_read(op_data->op_mea2_sem);
2664                 op_data->op_mea2_sem = NULL;
2665         }
2666
2667         if (op_data->op_mea1_sem) {
2668                 up_read(op_data->op_mea1_sem);
2669                 op_data->op_mea1_sem = NULL;
2670         }
2671 }
2672
2673 /* this function prepares md_op_data hint for passing it down to MD stack. */
2674 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2675                                       struct inode *i1, struct inode *i2,
2676                                       const char *name, size_t namelen,
2677                                       __u32 mode, enum md_op_code opc,
2678                                       void *data)
2679 {
2680         LASSERT(i1 != NULL);
2681
2682         if (name == NULL) {
2683                 /* Do not reuse namelen for something else. */
2684                 if (namelen != 0)
2685                         return ERR_PTR(-EINVAL);
2686         } else {
2687                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2688                         return ERR_PTR(-ENAMETOOLONG);
2689
2690                 if (!lu_name_is_valid_2(name, namelen))
2691                         return ERR_PTR(-EINVAL);
2692         }
2693
2694         if (op_data == NULL)
2695                 OBD_ALLOC_PTR(op_data);
2696
2697         if (op_data == NULL)
2698                 return ERR_PTR(-ENOMEM);
2699
2700         ll_i2gids(op_data->op_suppgids, i1, i2);
2701         op_data->op_fid1 = *ll_inode2fid(i1);
2702         op_data->op_code = opc;
2703
2704         if (S_ISDIR(i1->i_mode)) {
2705                 down_read(&ll_i2info(i1)->lli_lsm_sem);
2706                 op_data->op_mea1_sem = &ll_i2info(i1)->lli_lsm_sem;
2707                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2708                 op_data->op_default_mea1 = ll_i2info(i1)->lli_default_lsm_md;
2709         }
2710
2711         if (i2) {
2712                 op_data->op_fid2 = *ll_inode2fid(i2);
2713                 if (S_ISDIR(i2->i_mode)) {
2714                         if (i2 != i1) {
2715                                 down_read(&ll_i2info(i2)->lli_lsm_sem);
2716                                 op_data->op_mea2_sem =
2717                                                 &ll_i2info(i2)->lli_lsm_sem;
2718                         }
2719                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2720                 }
2721         } else {
2722                 fid_zero(&op_data->op_fid2);
2723         }
2724
2725         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2726                 op_data->op_cli_flags |= CLI_HASH64;
2727
2728         if (ll_need_32bit_api(ll_i2sbi(i1)))
2729                 op_data->op_cli_flags |= CLI_API32;
2730
2731         op_data->op_name = name;
2732         op_data->op_namelen = namelen;
2733         op_data->op_mode = mode;
2734         op_data->op_mod_time = ktime_get_real_seconds();
2735         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2736         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2737         op_data->op_cap = cfs_curproc_cap_pack();
2738         op_data->op_mds = 0;
2739         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2740              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2741                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2742         }
2743         op_data->op_data = data;
2744
2745         return op_data;
2746 }
2747
2748 void ll_finish_md_op_data(struct md_op_data *op_data)
2749 {
2750         ll_unlock_md_op_lsm(op_data);
2751         security_release_secctx(op_data->op_file_secctx,
2752                                 op_data->op_file_secctx_size);
2753         OBD_FREE_PTR(op_data);
2754 }
2755
2756 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2757 {
2758         struct ll_sb_info *sbi;
2759
2760         LASSERT(seq && dentry);
2761         sbi = ll_s2sbi(dentry->d_sb);
2762
2763         if (sbi->ll_flags & LL_SBI_NOLCK)
2764                 seq_puts(seq, ",nolock");
2765
2766         /* "flock" is the default since 2.13, but it wasn't for many years,
2767          * so it is still useful to print this to show it is enabled.
2768          * Start to print "noflock" so it is now clear when flock is disabled.
2769          */
2770         if (sbi->ll_flags & LL_SBI_FLOCK)
2771                 seq_puts(seq, ",flock");
2772         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2773                 seq_puts(seq, ",localflock");
2774         else
2775                 seq_puts(seq, ",noflock");
2776
2777         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2778                 seq_puts(seq, ",user_xattr");
2779
2780         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2781                 seq_puts(seq, ",lazystatfs");
2782
2783         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2784                 seq_puts(seq, ",user_fid2path");
2785
2786         if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
2787                 seq_puts(seq, ",always_ping");
2788
2789         RETURN(0);
2790 }
2791
2792 /**
2793  * Get obd name by cmd, and copy out to user space
2794  */
2795 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2796 {
2797         struct ll_sb_info *sbi = ll_i2sbi(inode);
2798         struct obd_device *obd;
2799         ENTRY;
2800
2801         if (cmd == OBD_IOC_GETDTNAME)
2802                 obd = class_exp2obd(sbi->ll_dt_exp);
2803         else if (cmd == OBD_IOC_GETMDNAME)
2804                 obd = class_exp2obd(sbi->ll_md_exp);
2805         else
2806                 RETURN(-EINVAL);
2807
2808         if (!obd)
2809                 RETURN(-ENOENT);
2810
2811         if (copy_to_user((void __user *)arg, obd->obd_name,
2812                          strlen(obd->obd_name) + 1))
2813                 RETURN(-EFAULT);
2814
2815         RETURN(0);
2816 }
2817
2818 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2819 {
2820         char *path = NULL;
2821
2822         struct path p;
2823
2824         p.dentry = dentry;
2825         p.mnt = current->fs->root.mnt;
2826         path_get(&p);
2827         path = d_path(&p, buf, bufsize);
2828         path_put(&p);
2829         return path;
2830 }
2831
2832 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2833 {
2834         char *buf, *path = NULL;
2835         struct dentry *dentry = NULL;
2836         struct inode *inode = page->mapping->host;
2837
2838         /* this can be called inside spin lock so use GFP_ATOMIC. */
2839         buf = (char *)__get_free_page(GFP_ATOMIC);
2840         if (buf != NULL) {
2841                 dentry = d_find_alias(page->mapping->host);
2842                 if (dentry != NULL)
2843                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2844         }
2845
2846         /* The below message is checked in recovery-small.sh test_24b */
2847         CDEBUG(D_WARNING,
2848                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2849                "(rc %d)\n", ll_i2sbi(inode)->ll_fsname,
2850                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2851                PFID(ll_inode2fid(inode)),
2852                (path && !IS_ERR(path)) ? path : "", ioret);
2853
2854         if (dentry != NULL)
2855                 dput(dentry);
2856
2857         if (buf != NULL)
2858                 free_page((unsigned long)buf);
2859 }
2860
2861 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2862                         struct lov_user_md **kbuf)
2863 {
2864         struct lov_user_md      lum;
2865         ssize_t                 lum_size;
2866         ENTRY;
2867
2868         if (copy_from_user(&lum, md, sizeof(lum)))
2869                 RETURN(-EFAULT);
2870
2871         lum_size = ll_lov_user_md_size(&lum);
2872         if (lum_size < 0)
2873                 RETURN(lum_size);
2874
2875         OBD_ALLOC_LARGE(*kbuf, lum_size);
2876         if (*kbuf == NULL)
2877                 RETURN(-ENOMEM);
2878
2879         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2880                 OBD_FREE_LARGE(*kbuf, lum_size);
2881                 RETURN(-EFAULT);
2882         }
2883
2884         RETURN(lum_size);
2885 }
2886
2887 /*
2888  * Compute llite root squash state after a change of root squash
2889  * configuration setting or add/remove of a lnet nid
2890  */
2891 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2892 {
2893         struct root_squash_info *squash = &sbi->ll_squash;
2894         int i;
2895         bool matched;
2896         struct lnet_process_id id;
2897
2898         /* Update norootsquash flag */
2899         spin_lock(&squash->rsi_lock);
2900         if (list_empty(&squash->rsi_nosquash_nids))
2901                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2902         else {
2903                 /* Do not apply root squash as soon as one of our NIDs is
2904                  * in the nosquash_nids list */
2905                 matched = false;
2906                 i = 0;
2907                 while (LNetGetId(i++, &id) != -ENOENT) {
2908                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2909                                 continue;
2910                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2911                                 matched = true;
2912                                 break;
2913                         }
2914                 }
2915                 if (matched)
2916                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2917                 else
2918                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2919         }
2920         spin_unlock(&squash->rsi_lock);
2921 }
2922
2923 /**
2924  * Parse linkea content to extract information about a given hardlink
2925  *
2926  * \param[in]   ldata      - Initialized linkea data
2927  * \param[in]   linkno     - Link identifier
2928  * \param[out]  parent_fid - The entry's parent FID
2929  * \param[out]  ln         - Entry name destination buffer
2930  *
2931  * \retval 0 on success
2932  * \retval Appropriate negative error code on failure
2933  */
2934 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2935                             struct lu_fid *parent_fid, struct lu_name *ln)
2936 {
2937         unsigned int    idx;
2938         int             rc;
2939         ENTRY;
2940
2941         rc = linkea_init_with_rec(ldata);
2942         if (rc < 0)
2943                 RETURN(rc);
2944
2945         if (linkno >= ldata->ld_leh->leh_reccount)
2946                 /* beyond last link */
2947                 RETURN(-ENODATA);
2948
2949         linkea_first_entry(ldata);
2950         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2951                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2952                                     parent_fid);
2953                 if (idx == linkno)
2954                         break;
2955
2956                 linkea_next_entry(ldata);
2957         }
2958
2959         if (idx < linkno)
2960                 RETURN(-ENODATA);
2961
2962         RETURN(0);
2963 }
2964
2965 /**
2966  * Get parent FID and name of an identified link. Operation is performed for
2967  * a given link number, letting the caller iterate over linkno to list one or
2968  * all links of an entry.
2969  *
2970  * \param[in]     file - File descriptor against which to perform the operation
2971  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2972  *                       on and the available size. It is eventually filled with
2973  *                       the requested information or left untouched on error
2974  *
2975  * \retval - 0 on success
2976  * \retval - Appropriate negative error code on failure
2977  */
2978 int ll_getparent(struct file *file, struct getparent __user *arg)
2979 {
2980         struct inode            *inode = file_inode(file);
2981         struct linkea_data      *ldata;
2982         struct lu_buf            buf = LU_BUF_NULL;
2983         struct lu_name           ln;
2984         struct lu_fid            parent_fid;
2985         __u32                    linkno;
2986         __u32                    name_size;
2987         int                      rc;
2988
2989         ENTRY;
2990
2991         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2992             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2993                 RETURN(-EPERM);
2994
2995         if (get_user(name_size, &arg->gp_name_size))
2996                 RETURN(-EFAULT);
2997
2998         if (get_user(linkno, &arg->gp_linkno))
2999                 RETURN(-EFAULT);
3000
3001         if (name_size > PATH_MAX)
3002                 RETURN(-EINVAL);
3003
3004         OBD_ALLOC(ldata, sizeof(*ldata));
3005         if (ldata == NULL)
3006                 RETURN(-ENOMEM);
3007
3008         rc = linkea_data_new(ldata, &buf);
3009         if (rc < 0)
3010                 GOTO(ldata_free, rc);
3011
3012         rc = ll_xattr_list(inode, XATTR_NAME_LINK, XATTR_TRUSTED_T, buf.lb_buf,
3013                            buf.lb_len, OBD_MD_FLXATTR);
3014         if (rc < 0)
3015                 GOTO(lb_free, rc);
3016
3017         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
3018         if (rc < 0)
3019                 GOTO(lb_free, rc);
3020
3021         if (ln.ln_namelen >= name_size)
3022                 GOTO(lb_free, rc = -EOVERFLOW);
3023
3024         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
3025                 GOTO(lb_free, rc = -EFAULT);
3026
3027         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
3028                 GOTO(lb_free, rc = -EFAULT);
3029
3030         if (put_user('\0', arg->gp_name + ln.ln_namelen))
3031                 GOTO(lb_free, rc = -EFAULT);
3032
3033 lb_free:
3034         lu_buf_free(&buf);
3035 ldata_free:
3036         OBD_FREE(ldata, sizeof(*ldata));
3037
3038         RETURN(rc);
3039 }