lustre/llite/dir.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2015, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/dir.c
  37  *
  38  * Directory code for lustre client.
  39  */
  40
  41 #include <linux/fs.h>
  42 #include <linux/pagemap.h>
  43 #include <linux/mm.h>
  44 #include <linux/version.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <asm/uaccess.h>
  50 #include <linux/buffer_head.h>   // for wait_on_buffer
  51 #include <linux/pagevec.h>
  52
  53 #define DEBUG_SUBSYSTEM S_LLITE
  54
  55 #include <lustre/lustre_idl.h>
  56
  57 #include <obd_support.h>
  58 #include <obd_class.h>
  59 #include <lustre_ioctl.h>
  60 #include <lustre_lib.h>
  61 #include <lustre_dlm.h>
  62 #include <lustre_fid.h>
  63 #include <lustre_kernelcomm.h>
  64 #include <lustre_swab.h>
  65
  66 #include "llite_internal.h"
  67
  68 /*
  69  * (new) readdir implementation overview.
  70  *
  71  * Original lustre readdir implementation cached exact copy of raw directory
  72  * pages on the client. These pages were indexed in client page cache by
  73  * logical offset in the directory file. This design, while very simple and
  74  * intuitive had some inherent problems:
  75  *
  76  *     . it implies that byte offset to the directory entry serves as a
  77  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  78  *     ext3/htree directory entries may move due to splits, and more
  79  *     importantly,
  80  *
  81  *     . it is incompatible with the design of split directories for cmd3,
  82  *     that assumes that names are distributed across nodes based on their
  83  *     hash, and so readdir should be done in hash order.
  84  *
  85  * New readdir implementation does readdir in hash order, and uses hash of a
  86  * file name as a telldir/seekdir cookie. This led to number of complications:
  87  *
  88  *     . hash is not unique, so it cannot be used to index cached directory
  89  *     pages on the client (note, that it requires a whole pageful of hash
  90  *     collided entries to cause two pages to have identical hashes);
  91  *
  92  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  93  *     entry cookie. ext3/htree has the same problem and lustre implementation
  94  *     mimics their solution: seekdir(hash) positions directory at the first
  95  *     entry with the given hash.
  96  *
  97  * Client side.
  98  *
  99  * 0. caching
 100  *
 101  * Client caches directory pages using hash of the first entry as an index. As
 102  * noted above hash is not unique, so this solution doesn't work as is:
 103  * special processing is needed for "page hash chains" (i.e., sequences of
 104  * pages filled with entries all having the same hash value).
 105  *
 106  * First, such chains have to be detected. To this end, server returns to the
 107  * client the hash of the first entry on the page next to one returned. When
 108  * client detects that this hash is the same as hash of the first entry on the
 109  * returned page, page hash collision has to be handled. Pages in the
 110  * hash chain, except first one, are termed "overflow pages".
 111  *
 112  * Solution to index uniqueness problem is to not cache overflow
 113  * pages. Instead, when page hash collision is detected, all overflow pages
 114  * from emerging chain are immediately requested from the server and placed in
 115  * a special data structure (struct ll_dir_chain). This data structure is used
 116  * by ll_readdir() to process entries from overflow pages. When readdir
 117  * invocation finishes, overflow pages are discarded. If page hash collision
 118  * chain weren't completely processed, next call to readdir will again detect
 119  * page hash collision, again read overflow pages in, process next portion of
 120  * entries and again discard the pages. This is not as wasteful as it looks,
 121  * because, given reasonable hash, page hash collisions are extremely rare.
 122  *
 123  * 1. directory positioning
 124  *
 125  * When seekdir(hash) is called, original
 126  *
 127  *
 128  *
 129  *
 130  *
 131  *
 132  *
 133  *
 134  * Server.
 135  *
 136  * identification of and access to overflow pages
 137  *
 138  * page format
 139  *
 140  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 141  * a header lu_dirpage which describes the start/end hash, and whether this
 142  * page is empty (contains no dir entry) or hash collide with next page.
 143  * After client receives reply, several pages will be integrated into dir page
 144  * in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
 145  * lu_dirpage for this integrated page will be adjusted. See
 146  * mdc_adjust_dirpages().
 147  *
 148  */
 149 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 150                              __u64 offset, struct ll_dir_chain *chain)
 151 {
 152         struct md_callback      cb_op;
 153         struct page             *page;
 154         int                     rc;
 155
 156         cb_op.md_blocking_ast = ll_md_blocking_ast;
 157         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 158         if (rc != 0)
 159                 return ERR_PTR(rc);
 160
 161         return page;
 162 }
 163
 164 void ll_release_page(struct inode *inode, struct page *page,
 165                      bool remove)
 166 {
 167         kunmap(page);
 168
 169         /* Always remove the page for striped dir, because the page is
 170          * built from temporarily in LMV layer */
 171         if (inode != NULL && S_ISDIR(inode->i_mode) &&
 172             ll_i2info(inode)->lli_lsm_md != NULL) {
 173                 __free_page(page);
 174                 return;
 175         }
 176
 177         if (remove) {
 178                 lock_page(page);
 179                 if (likely(page->mapping != NULL))
 180                         truncate_complete_page(page->mapping, page);
 181                 unlock_page(page);
 182         }
 183         page_cache_release(page);
 184 }
 185
 186 /**
 187  * return IF_* type for given lu_dirent entry.
 188  * IF_* flag shld be converted to particular OS file type in
 189  * platform llite module.
 190  */
 191 static u16 ll_dirent_type_get(struct lu_dirent *ent)
 192 {
 193         u16 type = 0;
 194         struct luda_type *lt;
 195         int len = 0;
 196
 197         if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
 198                 const unsigned align = sizeof(struct luda_type) - 1;
 199
 200                 len = le16_to_cpu(ent->lde_namelen);
 201                 len = (len + align) & ~align;
 202                 lt = (void *)ent->lde_name + len;
 203                 type = IFTODT(le16_to_cpu(lt->lt_type));
 204         }
 205
 206         return type;
 207 }
 208
 209 #ifdef HAVE_DIR_CONTEXT
 210 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 211                 struct dir_context *ctx)
 212 {
 213 #else
 214 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 215                 void *cookie, filldir_t filldir)
 216 {
 217 #endif
 218         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 219         __u64                 pos        = *ppos;
 220         bool                  is_api32 = ll_need_32bit_api(sbi);
 221         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 222         struct page          *page;
 223         struct ll_dir_chain   chain;
 224         bool                  done = false;
 225         int                   rc = 0;
 226         ENTRY;
 227
 228         ll_dir_chain_init(&chain);
 229
 230         page = ll_get_dir_page(inode, op_data, pos, &chain);
 231
 232         while (rc == 0 && !done) {
 233                 struct lu_dirpage *dp;
 234                 struct lu_dirent  *ent;
 235                 __u64 hash;
 236                 __u64 next;
 237
 238                 if (IS_ERR(page)) {
 239                         rc = PTR_ERR(page);
 240                         break;
 241                 }
 242
 243                 hash = MDS_DIR_END_OFF;
 244                 dp = page_address(page);
 245                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 246                      ent = lu_dirent_next(ent)) {
 247                         __u16          type;
 248                         int            namelen;
 249                         struct lu_fid  fid;
 250                         __u64          lhash;
 251                         __u64          ino;
 252
 253                         hash = le64_to_cpu(ent->lde_hash);
 254                         if (hash < pos)
 255                                 /*
 256                                  * Skip until we find target hash
 257                                  * value.
 258                                  */
 259                                 continue;
 260
 261                         namelen = le16_to_cpu(ent->lde_namelen);
 262                         if (namelen == 0)
 263                                 /*
 264                                  * Skip dummy record.
 265                                  */
 266                                 continue;
 267
 268                         if (is_api32 && is_hash64)
 269                                 lhash = hash >> 32;
 270                         else
 271                                 lhash = hash;
 272                         fid_le_to_cpu(&fid, &ent->lde_fid);
 273                         ino = cl_fid_build_ino(&fid, is_api32);
 274                         type = ll_dirent_type_get(ent);
 275                         /* For 'll_nfs_get_name_filldir()', it will try
 276                          * to access the 'ent' through its 'lde_name',
 277                          * so the parameter 'name' for 'filldir()' must
 278                          * be part of the 'ent'. */
 279 #ifdef HAVE_DIR_CONTEXT
 280                         ctx->pos = lhash;
 281                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 282                                          type);
 283 #else
 284                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 285                                        ino, type);
 286 #endif
 287                 }
 288
 289                 if (done) {
 290                         pos = hash;
 291                         ll_release_page(inode, page, false);
 292                         break;
 293                 }
 294
 295                 next = le64_to_cpu(dp->ldp_hash_end);
 296                 pos = next;
 297                 if (pos == MDS_DIR_END_OFF) {
 298                         /*
 299                          * End of directory reached.
 300                          */
 301                         done = 1;
 302                         ll_release_page(inode, page, false);
 303                 } else {
 304                         /*
 305                          * Normal case: continue to the next
 306                          * page.
 307                          */
 308                         ll_release_page(inode, page,
 309                                         le32_to_cpu(dp->ldp_flags) &
 310                                         LDF_COLLIDE);
 311                         next = pos;
 312                         page = ll_get_dir_page(inode, op_data, pos,
 313                                                &chain);
 314                 }
 315         }
 316 #ifdef HAVE_DIR_CONTEXT
 317         ctx->pos = pos;
 318 #else
 319         *ppos = pos;
 320 #endif
 321         ll_dir_chain_fini(&chain);
 322         RETURN(rc);
 323 }
 324
 325 #ifdef HAVE_DIR_CONTEXT
 326 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 327 #else
 328 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 329 #endif
 330 {
 331         struct inode            *inode  = file_inode(filp);
 332         struct ll_file_data     *lfd    = LUSTRE_FPRIVATE(filp);
 333         struct ll_sb_info       *sbi    = ll_i2sbi(inode);
 334         int                     hash64  = sbi->ll_flags & LL_SBI_64BIT_HASH;
 335         int                     api32   = ll_need_32bit_api(sbi);
 336         struct md_op_data       *op_data;
 337         __u64                   pos;
 338         int                     rc;
 339         ENTRY;
 340
 341         if (lfd != NULL)
 342                 pos = lfd->lfd_pos;
 343         else
 344                 pos = 0;
 345
 346         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) pos/size"
 347                "%lu/%llu 32bit_api %d\n", PFID(ll_inode2fid(inode)),
 348                inode, (unsigned long)pos, i_size_read(inode), api32);
 349
 350         if (pos == MDS_DIR_END_OFF)
 351                 /*
 352                  * end-of-file.
 353                  */
 354                 GOTO(out, rc = 0);
 355
 356         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 357                                      LUSTRE_OPC_ANY, inode);
 358         if (IS_ERR(op_data))
 359                 GOTO(out, rc = PTR_ERR(op_data));
 360
 361         if (unlikely(op_data->op_mea1 != NULL)) {
 362                 /* This is only needed for striped dir to fill ..,
 363                  * see lmv_read_entry */
 364                 if (file_dentry(filp)->d_parent != NULL &&
 365                     file_dentry(filp)->d_parent->d_inode != NULL) {
 366                         __u64 ibits = MDS_INODELOCK_UPDATE;
 367                         struct inode *parent =
 368                                 file_dentry(filp)->d_parent->d_inode;
 369
 370                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 371                                 op_data->op_fid3 = *ll_inode2fid(parent);
 372                 }
 373
 374                 /* If it can not find in cache, do lookup .. on the master
 375                  * object */
 376                 if (fid_is_zero(&op_data->op_fid3)) {
 377                         rc = ll_dir_get_parent_fid(inode, &op_data->op_fid3);
 378                         if (rc != 0) {
 379                                 ll_finish_md_op_data(op_data);
 380                                 RETURN(rc);
 381                         }
 382                 }
 383         }
 384         op_data->op_max_pages = sbi->ll_md_brw_pages;
 385 #ifdef HAVE_DIR_CONTEXT
 386         ctx->pos = pos;
 387         rc = ll_dir_read(inode, &pos, op_data, ctx);
 388         pos = ctx->pos;
 389 #else
 390         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 391 #endif
 392         if (lfd != NULL)
 393                 lfd->lfd_pos = pos;
 394
 395         if (pos == MDS_DIR_END_OFF) {
 396                 if (api32)
 397                         pos = LL_DIR_END_OFF_32BIT;
 398                 else
 399                         pos = LL_DIR_END_OFF;
 400         } else {
 401                 if (api32 && hash64)
 402                         pos = pos >> 32;
 403         }
 404 #ifdef HAVE_DIR_CONTEXT
 405         ctx->pos = pos;
 406 #else
 407         filp->f_pos = pos;
 408 #endif
 409         ll_finish_md_op_data(op_data);
 410         filp->f_version = inode->i_version;
 411
 412 out:
 413         if (!rc)
 414                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 415
 416         RETURN(rc);
 417 }
 418
 419 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 420 {
 421         struct mgs_send_param *msp;
 422         int rc = 0;
 423
 424         OBD_ALLOC_PTR(msp);
 425         if (!msp)
 426                 return -ENOMEM;
 427
 428         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 429         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 430                                 sizeof(struct mgs_send_param), msp, NULL);
 431         if (rc)
 432                 CERROR("Failed to set parameter: %d\n", rc);
 433         OBD_FREE_PTR(msp);
 434
 435         return rc;
 436 }
 437
 438 /**
 439  * Create striped directory with specified stripe(@lump)
 440  *
 441  * param[in]parent      the parent of the directory.
 442  * param[in]lump        the specified stripes.
 443  * param[in]dirname     the name of the directory.
 444  * param[in]mode        the specified mode of the directory.
 445  *
 446  * retval               =0 if striped directory is being created successfully.
 447  *                      <0 if the creation is failed.
 448  */
 449 static int ll_dir_setdirstripe(struct inode *parent, struct lmv_user_md *lump,
 450                                const char *dirname, umode_t mode)
 451 {
 452         struct ptlrpc_request *request = NULL;
 453         struct md_op_data *op_data;
 454         struct ll_sb_info *sbi = ll_i2sbi(parent);
 455         struct inode *inode = NULL;
 456         struct dentry dentry;
 457         int err;
 458         ENTRY;
 459
 460         if (unlikely(lump->lum_magic != LMV_USER_MAGIC))
 461                 RETURN(-EINVAL);
 462
 463         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) name %s"
 464                "stripe_offset %d, stripe_count: %u\n",
 465                PFID(ll_inode2fid(parent)), parent, dirname,
 466                (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 467
 468         if (lump->lum_stripe_count > 1 &&
 469             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 470                 RETURN(-EINVAL);
 471
 472         if (IS_DEADDIR(parent) &&
 473             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 474                 RETURN(-ENOENT);
 475
 476         if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
 477                 lustre_swab_lmv_user_md(lump);
 478
 479         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 480                 mode &= ~current_umask();
 481         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 482         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 483                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 484                                      lump);
 485         if (IS_ERR(op_data))
 486                 GOTO(err_exit, err = PTR_ERR(op_data));
 487
 488         op_data->op_cli_flags |= CLI_SET_MEA;
 489         err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
 490                         from_kuid(&init_user_ns, current_fsuid()),
 491                         from_kgid(&init_user_ns, current_fsgid()),
 492                         cfs_curproc_cap_pack(), 0, &request);
 493         ll_finish_md_op_data(op_data);
 494         if (err)
 495                 GOTO(err_exit, err);
 496
 497         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 498         if (err)
 499                 GOTO(err_exit, err);
 500
 501         memset(&dentry, 0, sizeof(dentry));
 502         dentry.d_inode = inode;
 503
 504         err = ll_init_security(&dentry, inode, parent);
 505         iput(inode);
 506         if (err)
 507                 GOTO(err_exit, err);
 508
 509 err_exit:
 510         ptlrpc_req_finished(request);
 511         return err;
 512 }
 513
 514 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 515                      int set_default)
 516 {
 517         struct ll_sb_info *sbi = ll_i2sbi(inode);
 518         struct md_op_data *op_data;
 519         struct ptlrpc_request *req = NULL;
 520         int rc = 0;
 521         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 522         struct obd_device *mgc = lsi->lsi_mgc;
 523         int lum_size;
 524         ENTRY;
 525
 526         if (lump != NULL) {
 527                 /*
 528                  * This is coming from userspace, so should be in
 529                  * local endian.  But the MDS would like it in little
 530                  * endian, so we swab it before we send it.
 531                  */
 532                 switch (lump->lmm_magic) {
 533                 case LOV_USER_MAGIC_V1: {
 534                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 535                                 lustre_swab_lov_user_md_v1(lump);
 536                         lum_size = sizeof(struct lov_user_md_v1);
 537                         break;
 538                 }
 539                 case LOV_USER_MAGIC_V3: {
 540                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 541                                 lustre_swab_lov_user_md_v3(
 542                                         (struct lov_user_md_v3 *)lump);
 543                         lum_size = sizeof(struct lov_user_md_v3);
 544                         break;
 545                 }
 546                 case LMV_USER_MAGIC: {
 547                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 548                                 lustre_swab_lmv_user_md(
 549                                         (struct lmv_user_md *)lump);
 550                         lum_size = sizeof(struct lmv_user_md);
 551                         break;
 552                 }
 553                 default: {
 554                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 555                                         " %#08x != %#08x nor %#08x\n",
 556                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 557                                         LOV_USER_MAGIC_V3);
 558                         RETURN(-EINVAL);
 559                 }
 560                 }
 561         } else {
 562                 lum_size = sizeof(struct lov_user_md_v1);
 563         }
 564
 565         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 566                                      LUSTRE_OPC_ANY, NULL);
 567         if (IS_ERR(op_data))
 568                 RETURN(PTR_ERR(op_data));
 569
 570         /* swabbing is done in lov_setstripe() on server side */
 571         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 572         ll_finish_md_op_data(op_data);
 573         ptlrpc_req_finished(req);
 574         if (rc) {
 575                 if (rc != -EPERM && rc != -EACCES)
 576                         CERROR("mdc_setattr fails: rc = %d\n", rc);
 577         }
 578
 579         /* In the following we use the fact that LOV_USER_MAGIC_V1 and
 580          LOV_USER_MAGIC_V3 have the same initial fields so we do not
 581          need the make the distiction between the 2 versions */
 582         if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
 583                 char *param = NULL;
 584                 char *buf;
 585
 586                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 587                 if (param == NULL)
 588                         GOTO(end, rc = -ENOMEM);
 589
 590                 buf = param;
 591                 /* Get fsname and assume devname to be -MDT0000. */
 592                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 593                 strcat(buf, "-MDT0000.lov");
 594                 buf += strlen(buf);
 595
 596                 /* Set root stripesize */
 597                 sprintf(buf, ".stripesize=%u",
 598                         lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 599                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 600                 if (rc)
 601                         GOTO(end, rc);
 602
 603                 /* Set root stripecount */
 604                 sprintf(buf, ".stripecount=%hd",
 605                         lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 606                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 607                 if (rc)
 608                         GOTO(end, rc);
 609
 610                 /* Set root stripeoffset */
 611                 sprintf(buf, ".stripeoffset=%hd",
 612                         lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 613                         (typeof(lump->lmm_stripe_offset))(-1));
 614                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 615
 616 end:
 617                 if (param != NULL)
 618                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 619         }
 620         RETURN(rc);
 621 }
 622
 623 /**
 624  * This function will be used to get default LOV/LMV/Default LMV
 625  * @valid will be used to indicate which stripe it will retrieve
 626  *      OBD_MD_MEA              LMV stripe EA
 627  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 628  *      otherwise               Default LOV EA.
 629  * Each time, it can only retrieve 1 stripe EA
 630  **/
 631 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 632                      struct ptlrpc_request **request, u64 valid)
 633 {
 634         struct ll_sb_info *sbi = ll_i2sbi(inode);
 635         struct mdt_body   *body;
 636         struct lov_mds_md *lmm = NULL;
 637         struct ptlrpc_request *req = NULL;
 638         int rc, lmm_size;
 639         struct md_op_data *op_data;
 640         ENTRY;
 641
 642         rc = ll_get_default_mdsize(sbi, &lmm_size);
 643         if (rc)
 644                 RETURN(rc);
 645
 646         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 647                                      0, lmm_size, LUSTRE_OPC_ANY,
 648                                      NULL);
 649         if (IS_ERR(op_data))
 650                 RETURN(PTR_ERR(op_data));
 651
 652         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 653         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 654         ll_finish_md_op_data(op_data);
 655         if (rc < 0) {
 656                 CDEBUG(D_INFO, "md_getattr failed on inode "
 657                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 658                 GOTO(out, rc);
 659         }
 660
 661         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 662         LASSERT(body != NULL);
 663
 664         lmm_size = body->mbo_eadatasize;
 665
 666         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 667             lmm_size == 0) {
 668                 GOTO(out, rc = -ENODATA);
 669         }
 670
 671         lmm = req_capsule_server_sized_get(&req->rq_pill,
 672                                            &RMF_MDT_MD, lmm_size);
 673         LASSERT(lmm != NULL);
 674
 675         /*
 676          * This is coming from the MDS, so is probably in
 677          * little endian.  We convert it to host endian before
 678          * passing it to userspace.
 679          */
 680         /* We don't swab objects for directories */
 681         switch (le32_to_cpu(lmm->lmm_magic)) {
 682         case LOV_MAGIC_V1:
 683                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 684                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 685                 break;
 686         case LOV_MAGIC_V3:
 687                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 688                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 689                 break;
 690         case LMV_MAGIC_V1:
 691                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 692                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 693                 break;
 694         case LMV_USER_MAGIC:
 695                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 696                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 697                 break;
 698         default:
 699                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 700                 rc = -EPROTO;
 701         }
 702 out:
 703         *plmm = lmm;
 704         *plmm_size = lmm_size;
 705         *request = req;
 706         return rc;
 707 }
 708
 709 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 710 {
 711         struct md_op_data       *op_data;
 712         int                     rc;
 713         int                     mdt_index;
 714         ENTRY;
 715
 716         OBD_ALLOC_PTR(op_data);
 717         if (op_data == NULL)
 718                 RETURN(-ENOMEM);
 719
 720         op_data->op_flags |= MF_GET_MDT_IDX;
 721         op_data->op_fid1 = *fid;
 722         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 723         mdt_index = op_data->op_mds;
 724         OBD_FREE_PTR(op_data);
 725         if (rc < 0)
 726                 RETURN(rc);
 727
 728         RETURN(mdt_index);
 729 }
 730
 731 /*
 732  *  Get MDT index for the inode.
 733  */
 734 int ll_get_mdt_idx(struct inode *inode)
 735 {
 736         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 737 }
 738
 739 /**
 740  * Generic handler to do any pre-copy work.
 741  *
 742  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 743  * first information for it that real work has started.
 744  *
 745  * Moreover, for a ARCHIVE request, it will sample the file data version and
 746  * store it in \a copy.
 747  *
 748  * \return 0 on success.
 749  */
 750 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 751 {
 752         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 753         struct hsm_progress_kernel       hpk;
 754         int                              rc = 0;
 755         int                              rc2;
 756         ENTRY;
 757
 758         /* Forge a hsm_progress based on data from copy. */
 759         hpk.hpk_fid = copy->hc_hai.hai_fid;
 760         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 761         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 762         hpk.hpk_extent.length = 0;
 763         hpk.hpk_flags = 0;
 764         hpk.hpk_errval = 0;
 765         hpk.hpk_data_version = 0;
 766
 767
 768         /* For archive request, we need to read the current file version. */
 769         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 770                 struct inode    *inode;
 771                 __u64            data_version = 0;
 772
 773                 /* Get inode for this fid */
 774                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 775                 if (IS_ERR(inode)) {
 776                         hpk.hpk_flags |= HP_FLAG_RETRY;
 777                         /* hpk_errval is >= 0 */
 778                         hpk.hpk_errval = -PTR_ERR(inode);
 779                         GOTO(progress, rc = PTR_ERR(inode));
 780                 }
 781
 782                 /* Read current file data version */
 783                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 784                 iput(inode);
 785                 if (rc != 0) {
 786                         CDEBUG(D_HSM, "Could not read file data version of "
 787                                       DFID" (rc = %d). Archive request ("
 788                                       LPX64") could not be done.\n",
 789                                       PFID(&copy->hc_hai.hai_fid), rc,
 790                                       copy->hc_hai.hai_cookie);
 791                         hpk.hpk_flags |= HP_FLAG_RETRY;
 792                         /* hpk_errval must be >= 0 */
 793                         hpk.hpk_errval = -rc;
 794                         GOTO(progress, rc);
 795                 }
 796
 797                 /* Store in the hsm_copy for later copytool use.
 798                  * Always modified even if no lsm. */
 799                 copy->hc_data_version = data_version;
 800         }
 801
 802 progress:
 803         /* On error, the request should be considered as completed */
 804         if (hpk.hpk_errval > 0)
 805                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 806
 807         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 808                             &hpk, NULL);
 809
 810         /* Return first error */
 811         RETURN(rc != 0 ? rc : rc2);
 812 }
 813
 814 /**
 815  * Generic handler to do any post-copy work.
 816  *
 817  * It will send the last hsm_progress update to coordinator to inform it
 818  * that copy is finished and whether it was successful or not.
 819  *
 820  * Moreover,
 821  * - for ARCHIVE request, it will sample the file data version and compare it
 822  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 823  *   will be considered as failed.
 824  * - for RESTORE request, it will sample the file data version and send it to
 825  *   coordinator which is useful if the file was imported as 'released'.
 826  *
 827  * \return 0 on success.
 828  */
 829 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 830 {
 831         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 832         struct hsm_progress_kernel       hpk;
 833         int                              rc = 0;
 834         int                              rc2;
 835         ENTRY;
 836
 837         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 838         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 839          * initialized if copy_end was called with copy == NULL.
 840          */
 841
 842         /* Forge a hsm_progress based on data from copy. */
 843         hpk.hpk_fid = copy->hc_hai.hai_fid;
 844         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 845         hpk.hpk_extent = copy->hc_hai.hai_extent;
 846         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 847         hpk.hpk_errval = copy->hc_errval;
 848         hpk.hpk_data_version = 0;
 849
 850         /* For archive request, we need to check the file data was not changed.
 851          *
 852          * For restore request, we need to send the file data version, this is
 853          * useful when the file was created using hsm_import.
 854          */
 855         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 856              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 857             (copy->hc_errval == 0)) {
 858                 struct inode    *inode;
 859                 __u64            data_version = 0;
 860
 861                 /* Get lsm for this fid */
 862                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 863                 if (IS_ERR(inode)) {
 864                         hpk.hpk_flags |= HP_FLAG_RETRY;
 865                         /* hpk_errval must be >= 0 */
 866                         hpk.hpk_errval = -PTR_ERR(inode);
 867                         GOTO(progress, rc = PTR_ERR(inode));
 868                 }
 869
 870                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 871                 iput(inode);
 872                 if (rc) {
 873                         CDEBUG(D_HSM, "Could not read file data version. "
 874                                       "Request could not be confirmed.\n");
 875                         if (hpk.hpk_errval == 0)
 876                                 hpk.hpk_errval = -rc;
 877                         GOTO(progress, rc);
 878                 }
 879
 880                 /* Store in the hsm_copy for later copytool use.
 881                  * Always modified even if no lsm. */
 882                 hpk.hpk_data_version = data_version;
 883
 884                 /* File could have been stripped during archiving, so we need
 885                  * to check anyway. */
 886                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 887                     (copy->hc_data_version != data_version)) {
 888                         CDEBUG(D_HSM, "File data version mismatched. "
 889                               "File content was changed during archiving. "
 890                                DFID", start:"LPX64" current:"LPX64"\n",
 891                                PFID(&copy->hc_hai.hai_fid),
 892                                copy->hc_data_version, data_version);
 893                         /* File was changed, send error to cdt. Do not ask for
 894                          * retry because if a file is modified frequently,
 895                          * the cdt will loop on retried archive requests.
 896                          * The policy engine will ask for a new archive later
 897                          * when the file will not be modified for some tunable
 898                          * time */
 899                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 900                         rc = -EBUSY;
 901                         /* hpk_errval must be >= 0 */
 902                         hpk.hpk_errval = -rc;
 903                         GOTO(progress, rc);
 904                 }
 905
 906         }
 907
 908 progress:
 909         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 910                             &hpk, NULL);
 911
 912         /* Return first error */
 913         RETURN(rc != 0 ? rc : rc2);
 914 }
 915
 916
 917 static int copy_and_ioctl(int cmd, struct obd_export *exp,
 918                           const void __user *data, size_t size)
 919 {
 920         void *copy;
 921         int rc;
 922
 923         OBD_ALLOC(copy, size);
 924         if (copy == NULL)
 925                 return -ENOMEM;
 926
 927         if (copy_from_user(copy, data, size)) {
 928                 rc = -EFAULT;
 929                 goto out;
 930         }
 931
 932         rc = obd_iocontrol(cmd, exp, size, copy, NULL);
 933 out:
 934         OBD_FREE(copy, size);
 935
 936         return rc;
 937 }
 938
 939 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
 940 {
 941         int cmd = qctl->qc_cmd;
 942         int type = qctl->qc_type;
 943         int id = qctl->qc_id;
 944         int valid = qctl->qc_valid;
 945         int rc = 0;
 946         ENTRY;
 947
 948         switch (cmd) {
 949         case Q_SETQUOTA:
 950         case Q_SETINFO:
 951                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
 952                         RETURN(-EPERM);
 953                 break;
 954         case Q_GETQUOTA:
 955                 if (((type == USRQUOTA &&
 956                       !uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
 957                      (type == GRPQUOTA &&
 958                       !in_egroup_p(make_kgid(&init_user_ns, id)))) &&
 959                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
 960                         RETURN(-EPERM);
 961                 break;
 962         case Q_GETINFO:
 963                 break;
 964         default:
 965                 CERROR("unsupported quotactl op: %#x\n", cmd);
 966                 RETURN(-ENOTTY);
 967         }
 968
 969         if (valid != QC_GENERAL) {
 970                 if (cmd == Q_GETINFO)
 971                         qctl->qc_cmd = Q_GETOINFO;
 972                 else if (cmd == Q_GETQUOTA)
 973                         qctl->qc_cmd = Q_GETOQUOTA;
 974                 else
 975                         RETURN(-EINVAL);
 976
 977                 switch (valid) {
 978                 case QC_MDTIDX:
 979                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
 980                                            sizeof(*qctl), qctl, NULL);
 981                         break;
 982                 case QC_OSTIDX:
 983                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
 984                                            sizeof(*qctl), qctl, NULL);
 985                         break;
 986                 case QC_UUID:
 987                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
 988                                            sizeof(*qctl), qctl, NULL);
 989                         if (rc == -EAGAIN)
 990                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
 991                                                    sbi->ll_dt_exp,
 992                                                    sizeof(*qctl), qctl, NULL);
 993                         break;
 994                 default:
 995                         rc = -EINVAL;
 996                         break;
 997                 }
 998
 999                 if (rc)
1000                         RETURN(rc);
1001
1002                 qctl->qc_cmd = cmd;
1003         } else {
1004                 struct obd_quotactl *oqctl;
1005
1006                 OBD_ALLOC_PTR(oqctl);
1007                 if (oqctl == NULL)
1008                         RETURN(-ENOMEM);
1009
1010                 QCTL_COPY(oqctl, qctl);
1011                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1012                 if (rc) {
1013                         OBD_FREE_PTR(oqctl);
1014                         RETURN(rc);
1015                 }
1016                 /* If QIF_SPACE is not set, client should collect the
1017                  * space usage from OSSs by itself */
1018                 if (cmd == Q_GETQUOTA &&
1019                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1020                     !oqctl->qc_dqblk.dqb_curspace) {
1021                         struct obd_quotactl *oqctl_tmp;
1022
1023                         OBD_ALLOC_PTR(oqctl_tmp);
1024                         if (oqctl_tmp == NULL)
1025                                 GOTO(out, rc = -ENOMEM);
1026
1027                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1028                         oqctl_tmp->qc_id = oqctl->qc_id;
1029                         oqctl_tmp->qc_type = oqctl->qc_type;
1030
1031                         /* collect space usage from OSTs */
1032                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1033                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1034                         if (!rc || rc == -EREMOTEIO) {
1035                                 oqctl->qc_dqblk.dqb_curspace =
1036                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1037                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1038                         }
1039
1040                         /* collect space & inode usage from MDTs */
1041                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1042                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1043                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1044                         if (!rc || rc == -EREMOTEIO) {
1045                                 oqctl->qc_dqblk.dqb_curspace +=
1046                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1047                                 oqctl->qc_dqblk.dqb_curinodes =
1048                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1049                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1050                         } else {
1051                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1052                         }
1053
1054                         OBD_FREE_PTR(oqctl_tmp);
1055                 }
1056 out:
1057                 QCTL_COPY(qctl, oqctl);
1058                 OBD_FREE_PTR(oqctl);
1059         }
1060
1061         RETURN(rc);
1062 }
1063
1064 /* This function tries to get a single name component,
1065  * to send to the server. No actual path traversal involved,
1066  * so we limit to NAME_MAX */
1067 static char *ll_getname(const char __user *filename)
1068 {
1069         int ret = 0, len;
1070         char *tmp;
1071
1072         OBD_ALLOC(tmp, NAME_MAX + 1);
1073
1074         if (!tmp)
1075                 return ERR_PTR(-ENOMEM);
1076
1077         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1078         if (len < 0)
1079                 ret = -ENOENT;
1080         else if (len > NAME_MAX)
1081                 ret = -ENAMETOOLONG;
1082
1083         if (ret) {
1084                 OBD_FREE(tmp, NAME_MAX + 1);
1085                 tmp =  ERR_PTR(ret);
1086         }
1087         return tmp;
1088 }
1089
1090 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1091
1092 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1093 {
1094         struct inode *inode = file_inode(file);
1095         struct ll_sb_info *sbi = ll_i2sbi(inode);
1096         struct obd_ioctl_data *data;
1097         int rc = 0;
1098         ENTRY;
1099
1100         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1101                PFID(ll_inode2fid(inode)), inode, cmd);
1102
1103         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1104         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1105                 return -ENOTTY;
1106
1107         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1108         switch(cmd) {
1109         case FSFILT_IOC_GETFLAGS:
1110         case FSFILT_IOC_SETFLAGS:
1111                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1112         case FSFILT_IOC_GETVERSION_OLD:
1113         case FSFILT_IOC_GETVERSION:
1114                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1115         /* We need to special case any other ioctls we want to handle,
1116          * to send them to the MDS/OST as appropriate and to properly
1117          * network encode the arg field.
1118         case FSFILT_IOC_SETVERSION_OLD:
1119         case FSFILT_IOC_SETVERSION:
1120         */
1121         case LL_IOC_GET_MDTIDX: {
1122                 int mdtidx;
1123
1124                 mdtidx = ll_get_mdt_idx(inode);
1125                 if (mdtidx < 0)
1126                         RETURN(mdtidx);
1127
1128                 if (put_user((int)mdtidx, (int __user *)arg))
1129                         RETURN(-EFAULT);
1130
1131                 return 0;
1132         }
1133         case IOC_MDC_LOOKUP: {
1134                 int namelen, len = 0;
1135                 char *buf = NULL;
1136                 char *filename;
1137
1138                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1139                 if (rc != 0)
1140                         RETURN(rc);
1141                 data = (void *)buf;
1142
1143                 filename = data->ioc_inlbuf1;
1144                 namelen = strlen(filename);
1145                 if (namelen < 1) {
1146                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1147                         GOTO(out_free, rc = -EINVAL);
1148                 }
1149
1150                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1151                 if (rc < 0) {
1152                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1153                                ll_get_fsname(inode->i_sb, NULL, 0), namelen,
1154                                filename, rc);
1155                         GOTO(out_free, rc);
1156                 }
1157 out_free:
1158                 obd_ioctl_freedata(buf, len);
1159                 return rc;
1160         }
1161         case LL_IOC_LMV_SETSTRIPE: {
1162                 struct lmv_user_md  *lum;
1163                 char            *buf = NULL;
1164                 char            *filename;
1165                 int              namelen = 0;
1166                 int              lumlen = 0;
1167                 umode_t          mode;
1168                 int              len;
1169                 int              rc;
1170
1171                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1172                 if (rc)
1173                         RETURN(rc);
1174
1175                 data = (void *)buf;
1176                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1177                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1178                         GOTO(lmv_out_free, rc = -EINVAL);
1179
1180                 filename = data->ioc_inlbuf1;
1181                 namelen = data->ioc_inllen1;
1182
1183                 if (namelen < 1) {
1184                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1185                         GOTO(lmv_out_free, rc = -EINVAL);
1186                 }
1187                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1188                 lumlen = data->ioc_inllen2;
1189
1190                 if (lum->lum_magic != LMV_USER_MAGIC ||
1191                     lumlen != sizeof(*lum)) {
1192                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1193                                filename, lum->lum_magic, lumlen, -EFAULT);
1194                         GOTO(lmv_out_free, rc = -EINVAL);
1195                 }
1196
1197 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1198                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1199 #else
1200                 mode = data->ioc_type;
1201 #endif
1202                 rc = ll_dir_setdirstripe(inode, lum, filename, mode);
1203 lmv_out_free:
1204                 obd_ioctl_freedata(buf, len);
1205                 RETURN(rc);
1206
1207         }
1208         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1209                 struct lmv_user_md        lum;
1210                 struct lmv_user_md __user *ulump =
1211                                         (struct lmv_user_md __user *)arg;
1212                 int                       rc;
1213
1214                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1215                         RETURN(-EFAULT);
1216
1217                 if (lum.lum_magic != LMV_USER_MAGIC)
1218                         RETURN(-EINVAL);
1219
1220                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1221
1222                 RETURN(rc);
1223         }
1224         case LL_IOC_LOV_SETSTRIPE: {
1225                 struct lov_user_md_v3 lumv3;
1226                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1227                 struct lov_user_md_v1 __user *lumv1p =
1228                         (struct lov_user_md_v1 __user *)arg;
1229                 struct lov_user_md_v3 __user *lumv3p =
1230                         (struct lov_user_md_v3 __user *)arg;
1231
1232                 int set_default = 0;
1233
1234                 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1235                 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1236                         sizeof(lumv3p->lmm_objects[0]));
1237                 /* first try with v1 which is smaller than v3 */
1238                 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1239                         RETURN(-EFAULT);
1240
1241                 if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
1242                         if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1243                                 RETURN(-EFAULT);
1244                 }
1245
1246                 if (inode->i_sb->s_root == file_dentry(file))
1247                         set_default = 1;
1248
1249                 /* in v1 and v3 cases lumv1 points to data */
1250                 rc = ll_dir_setstripe(inode, lumv1, set_default);
1251
1252                 RETURN(rc);
1253         }
1254         case LL_IOC_LMV_GETSTRIPE: {
1255                 struct lmv_user_md __user *ulmv =
1256                                         (struct lmv_user_md __user *)arg;
1257                 struct lmv_user_md      lum;
1258                 struct ptlrpc_request   *request = NULL;
1259                 union lmv_mds_md        *lmm = NULL;
1260                 int                     lmmsize;
1261                 u64                     valid = 0;
1262                 struct lmv_user_md      *tmp = NULL;
1263                 int                     mdt_index;
1264                 int                     lum_size;
1265                 int                     stripe_count;
1266                 int                     max_stripe_count;
1267                 int                     i;
1268                 int                     rc;
1269
1270                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1271                         RETURN(-EFAULT);
1272
1273                 max_stripe_count = lum.lum_stripe_count;
1274                 /* lum_magic will indicate which stripe the ioctl will like
1275                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1276                  * is for default LMV stripe */
1277                 if (lum.lum_magic == LMV_MAGIC_V1)
1278                         valid |= OBD_MD_MEA;
1279                 else if (lum.lum_magic == LMV_USER_MAGIC)
1280                         valid |= OBD_MD_DEFAULT_MEA;
1281                 else
1282                         RETURN(-EINVAL);
1283
1284                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1285                                       valid);
1286                 if (rc != 0)
1287                         GOTO(finish_req, rc);
1288
1289                 /* Get default LMV EA */
1290                 if (lum.lum_magic == LMV_USER_MAGIC) {
1291                         if (lmmsize > sizeof(*ulmv))
1292                                 GOTO(finish_req, rc = -EINVAL);
1293
1294                         if (copy_to_user(ulmv, lmm, lmmsize))
1295                                 GOTO(finish_req, rc = -EFAULT);
1296
1297                         GOTO(finish_req, rc);
1298                 }
1299
1300                 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1301                 if (max_stripe_count < stripe_count) {
1302                         lum.lum_stripe_count = stripe_count;
1303                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1304                                 GOTO(finish_req, rc = -EFAULT);
1305                         GOTO(finish_req, rc = -E2BIG);
1306                 }
1307
1308                 lum_size = lmv_user_md_size(stripe_count, LMV_MAGIC_V1);
1309                 OBD_ALLOC(tmp, lum_size);
1310                 if (tmp == NULL)
1311                         GOTO(finish_req, rc = -ENOMEM);
1312
1313                 mdt_index = ll_get_mdt_idx(inode);
1314                 if (mdt_index < 0)
1315                         GOTO(out_tmp, rc = -ENOMEM);
1316
1317                 tmp->lum_magic = LMV_MAGIC_V1;
1318                 tmp->lum_stripe_count = 0;
1319                 tmp->lum_stripe_offset = mdt_index;
1320                 for (i = 0; i < stripe_count; i++) {
1321                         struct lu_fid   fid;
1322
1323                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1324                         mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1325                         if (mdt_index < 0)
1326                                 GOTO(out_tmp, rc = mdt_index);
1327
1328                         tmp->lum_objects[i].lum_mds = mdt_index;
1329                         tmp->lum_objects[i].lum_fid = fid;
1330                         tmp->lum_stripe_count++;
1331                 }
1332
1333                 if (copy_to_user(ulmv, tmp, lum_size))
1334                         GOTO(out_tmp, rc = -EFAULT);
1335 out_tmp:
1336                 OBD_FREE(tmp, lum_size);
1337 finish_req:
1338                 ptlrpc_req_finished(request);
1339                 return rc;
1340         }
1341
1342         case LL_IOC_REMOVE_ENTRY: {
1343                 char            *filename = NULL;
1344                 int              namelen = 0;
1345                 int              rc;
1346
1347                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1348                  * unsupported server, which might crash the server(LU-2730),
1349                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1350                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1351                  * server will support REINT_RMENTRY XXX*/
1352                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1353                         RETURN(-ENOTSUPP);
1354
1355                 filename = ll_getname((const char __user *)arg);
1356                 if (IS_ERR(filename))
1357                         RETURN(PTR_ERR(filename));
1358
1359                 namelen = strlen(filename);
1360                 if (namelen < 1)
1361                         GOTO(out_rmdir, rc = -EINVAL);
1362
1363                 rc = ll_rmdir_entry(inode, filename, namelen);
1364 out_rmdir:
1365                 if (filename)
1366                         ll_putname(filename);
1367                 RETURN(rc);
1368         }
1369         case LL_IOC_LOV_SWAP_LAYOUTS:
1370                 RETURN(-EPERM);
1371         case IOC_OBD_STATFS:
1372                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1373         case LL_IOC_LOV_GETSTRIPE:
1374         case LL_IOC_MDC_GETINFO:
1375         case IOC_MDC_GETFILEINFO:
1376         case IOC_MDC_GETFILESTRIPE: {
1377                 struct ptlrpc_request *request = NULL;
1378                 struct lov_user_md __user *lump;
1379                 struct lov_mds_md *lmm = NULL;
1380                 struct mdt_body *body;
1381                 char *filename = NULL;
1382                 int lmmsize;
1383
1384                 if (cmd == IOC_MDC_GETFILEINFO ||
1385                     cmd == IOC_MDC_GETFILESTRIPE) {
1386                         filename = ll_getname((const char __user *)arg);
1387                         if (IS_ERR(filename))
1388                                 RETURN(PTR_ERR(filename));
1389
1390                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1391                                                       &lmmsize, &request);
1392                 } else {
1393                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1394                                               &request, 0);
1395                 }
1396
1397                 if (request) {
1398                         body = req_capsule_server_get(&request->rq_pill,
1399                                                       &RMF_MDT_BODY);
1400                         LASSERT(body != NULL);
1401                 } else {
1402                         GOTO(out_req, rc);
1403                 }
1404
1405                 if (rc < 0) {
1406                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1407                                                cmd == LL_IOC_MDC_GETINFO))
1408                                 GOTO(skip_lmm, rc = 0);
1409                         else
1410                                 GOTO(out_req, rc);
1411                 }
1412
1413                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1414                     cmd == LL_IOC_LOV_GETSTRIPE) {
1415                         lump = (struct lov_user_md __user *)arg;
1416                 } else {
1417                         struct lov_user_mds_data __user *lmdp;
1418                         lmdp = (struct lov_user_mds_data __user *)arg;
1419                         lump = &lmdp->lmd_lmm;
1420                 }
1421                 if (copy_to_user(lump, lmm, lmmsize)) {
1422                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1423                                 GOTO(out_req, rc = -EFAULT);
1424                         rc = -EOVERFLOW;
1425                 }
1426         skip_lmm:
1427                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1428                         struct lov_user_mds_data __user *lmdp;
1429                         lstat_t st = { 0 };
1430
1431                         st.st_dev       = inode->i_sb->s_dev;
1432                         st.st_mode      = body->mbo_mode;
1433                         st.st_nlink     = body->mbo_nlink;
1434                         st.st_uid       = body->mbo_uid;
1435                         st.st_gid       = body->mbo_gid;
1436                         st.st_rdev      = body->mbo_rdev;
1437                         st.st_size      = body->mbo_size;
1438                         st.st_blksize   = PAGE_CACHE_SIZE;
1439                         st.st_blocks    = body->mbo_blocks;
1440                         st.st_atime     = body->mbo_atime;
1441                         st.st_mtime     = body->mbo_mtime;
1442                         st.st_ctime     = body->mbo_ctime;
1443                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1444                                                 sbi->ll_flags &
1445                                                 LL_SBI_32BIT_API);
1446
1447                         lmdp = (struct lov_user_mds_data __user *)arg;
1448                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1449                                 GOTO(out_req, rc = -EFAULT);
1450                 }
1451
1452                 EXIT;
1453         out_req:
1454                 ptlrpc_req_finished(request);
1455                 if (filename)
1456                         ll_putname(filename);
1457                 return rc;
1458         }
1459         case OBD_IOC_QUOTACTL: {
1460                 struct if_quotactl *qctl;
1461
1462                 OBD_ALLOC_PTR(qctl);
1463                 if (!qctl)
1464                         RETURN(-ENOMEM);
1465
1466                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1467                         GOTO(out_quotactl, rc = -EFAULT);
1468
1469                 rc = quotactl_ioctl(sbi, qctl);
1470
1471                 if (rc == 0 &&
1472                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1473                         rc = -EFAULT;
1474
1475         out_quotactl:
1476                 OBD_FREE_PTR(qctl);
1477                 RETURN(rc);
1478         }
1479         case OBD_IOC_GETDTNAME:
1480         case OBD_IOC_GETMDNAME:
1481                 RETURN(ll_get_obd_name(inode, cmd, arg));
1482         case LL_IOC_FLUSHCTX:
1483                 RETURN(ll_flush_ctx(inode));
1484         case LL_IOC_GETOBDCOUNT: {
1485                 u32 count, vallen;
1486                 struct obd_export *exp;
1487
1488                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1489                         RETURN(-EFAULT);
1490
1491                 /* get ost count when count is zero, get mdt count otherwise */
1492                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1493                 vallen = sizeof(count);
1494                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1495                                   KEY_TGT_COUNT, &vallen, &count);
1496                 if (rc) {
1497                         CERROR("get target count failed: %d\n", rc);
1498                         RETURN(rc);
1499                 }
1500
1501                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1502                         RETURN(-EFAULT);
1503
1504                 RETURN(0);
1505         }
1506         case LL_IOC_PATH2FID:
1507                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1508                                      sizeof(struct lu_fid)))
1509                         RETURN(-EFAULT);
1510                 RETURN(0);
1511         case LL_IOC_GET_CONNECT_FLAGS: {
1512                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1513                                      (void __user *)arg));
1514         }
1515         case OBD_IOC_CHANGELOG_SEND:
1516         case OBD_IOC_CHANGELOG_CLEAR:
1517                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1518                         RETURN(-EPERM);
1519
1520                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1521                                     sizeof(struct ioc_changelog));
1522                 RETURN(rc);
1523         case OBD_IOC_FID2PATH:
1524                 RETURN(ll_fid2path(inode, (void __user *)arg));
1525         case LL_IOC_GETPARENT:
1526                 RETURN(ll_getparent(file, (void __user *)arg));
1527         case LL_IOC_FID2MDTIDX: {
1528                 struct obd_export *exp = ll_i2mdexp(inode);
1529                 struct lu_fid     fid;
1530                 __u32             index;
1531
1532                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1533                                    sizeof(fid)))
1534                         RETURN(-EFAULT);
1535
1536                 /* Call mdc_iocontrol */
1537                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1538                                    (__u32 __user *)&index);
1539                 if (rc != 0)
1540                         RETURN(rc);
1541
1542                 RETURN(index);
1543         }
1544         case LL_IOC_HSM_REQUEST: {
1545                 struct hsm_user_request *hur;
1546                 ssize_t                  totalsize;
1547
1548                 OBD_ALLOC_PTR(hur);
1549                 if (hur == NULL)
1550                         RETURN(-ENOMEM);
1551
1552                 /* We don't know the true size yet; copy the fixed-size part */
1553                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1554                         OBD_FREE_PTR(hur);
1555                         RETURN(-EFAULT);
1556                 }
1557
1558                 /* Compute the whole struct size */
1559                 totalsize = hur_len(hur);
1560                 OBD_FREE_PTR(hur);
1561                 if (totalsize < 0)
1562                         RETURN(-E2BIG);
1563
1564                 /* Final size will be more than double totalsize */
1565                 if (totalsize >= MDS_MAXREQSIZE / 3)
1566                         RETURN(-E2BIG);
1567
1568                 OBD_ALLOC_LARGE(hur, totalsize);
1569                 if (hur == NULL)
1570                         RETURN(-ENOMEM);
1571
1572                 /* Copy the whole struct */
1573                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1574                         GOTO(out_hur, rc = -EFAULT);
1575
1576                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1577                         const struct lu_fid *fid;
1578                         struct inode *f;
1579                         int i;
1580
1581                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1582                                 fid = &hur->hur_user_item[i].hui_fid;
1583                                 f = search_inode_for_lustre(inode->i_sb, fid);
1584                                 if (IS_ERR(f)) {
1585                                         rc = PTR_ERR(f);
1586                                         break;
1587                                 }
1588
1589                                 rc = ll_hsm_release(f);
1590                                 iput(f);
1591                                 if (rc != 0)
1592                                         break;
1593                         }
1594                 } else {
1595                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1596                                            hur, NULL);
1597                 }
1598
1599 out_hur:
1600                 OBD_FREE_LARGE(hur, totalsize);
1601
1602                 RETURN(rc);
1603         }
1604         case LL_IOC_HSM_PROGRESS: {
1605                 struct hsm_progress_kernel      hpk;
1606                 struct hsm_progress             hp;
1607
1608                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1609                         RETURN(-EFAULT);
1610
1611                 hpk.hpk_fid = hp.hp_fid;
1612                 hpk.hpk_cookie = hp.hp_cookie;
1613                 hpk.hpk_extent = hp.hp_extent;
1614                 hpk.hpk_flags = hp.hp_flags;
1615                 hpk.hpk_errval = hp.hp_errval;
1616                 hpk.hpk_data_version = 0;
1617
1618                 /* File may not exist in Lustre; all progress
1619                  * reported to Lustre root */
1620                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1621                                    NULL);
1622                 RETURN(rc);
1623         }
1624         case LL_IOC_HSM_CT_START:
1625                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1626                         RETURN(-EPERM);
1627
1628                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1629                                     sizeof(struct lustre_kernelcomm));
1630                 RETURN(rc);
1631
1632         case LL_IOC_HSM_COPY_START: {
1633                 struct hsm_copy *copy;
1634                 int              rc;
1635
1636                 OBD_ALLOC_PTR(copy);
1637                 if (copy == NULL)
1638                         RETURN(-ENOMEM);
1639                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1640                         OBD_FREE_PTR(copy);
1641                         RETURN(-EFAULT);
1642                 }
1643
1644                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1645                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1646                         rc = -EFAULT;
1647
1648                 OBD_FREE_PTR(copy);
1649                 RETURN(rc);
1650         }
1651         case LL_IOC_HSM_COPY_END: {
1652                 struct hsm_copy *copy;
1653                 int              rc;
1654
1655                 OBD_ALLOC_PTR(copy);
1656                 if (copy == NULL)
1657                         RETURN(-ENOMEM);
1658                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1659                         OBD_FREE_PTR(copy);
1660                         RETURN(-EFAULT);
1661                 }
1662
1663                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1664                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1665                         rc = -EFAULT;
1666
1667                 OBD_FREE_PTR(copy);
1668                 RETURN(rc);
1669         }
1670         case LL_IOC_MIGRATE: {
1671                 char            *buf = NULL;
1672                 const char      *filename;
1673                 int             namelen = 0;
1674                 int             len;
1675                 int             rc;
1676                 int             mdtidx;
1677
1678                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1679                 if (rc < 0)
1680                         RETURN(rc);
1681
1682                 data = (struct obd_ioctl_data *)buf;
1683                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1684                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1685                         GOTO(migrate_free, rc = -EINVAL);
1686
1687                 filename = data->ioc_inlbuf1;
1688                 namelen = data->ioc_inllen1;
1689                 /* \0 is packed at the end of filename */
1690                 if (namelen < 1 || namelen != strlen(filename) + 1)
1691                         GOTO(migrate_free, rc = -EINVAL);
1692
1693                 if (data->ioc_inllen2 != sizeof(mdtidx))
1694                         GOTO(migrate_free, rc = -EINVAL);
1695                 mdtidx = *(int *)data->ioc_inlbuf2;
1696
1697                 rc = ll_migrate(inode, file, mdtidx, filename, namelen - 1);
1698 migrate_free:
1699                 obd_ioctl_freedata(buf, len);
1700
1701                 RETURN(rc);
1702         }
1703         default:
1704                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1705                                      (void __user *)arg));
1706         }
1707 }
1708
1709 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1710 {
1711         struct inode *inode = file->f_mapping->host;
1712         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1713         struct ll_sb_info *sbi = ll_i2sbi(inode);
1714         int api32 = ll_need_32bit_api(sbi);
1715         loff_t ret = -EINVAL;
1716         ENTRY;
1717
1718         mutex_lock(&inode->i_mutex);
1719         switch (origin) {
1720                 case SEEK_SET:
1721                         break;
1722                 case SEEK_CUR:
1723                         offset += file->f_pos;
1724                         break;
1725                 case SEEK_END:
1726                         if (offset > 0)
1727                                 GOTO(out, ret);
1728                         if (api32)
1729                                 offset += LL_DIR_END_OFF_32BIT;
1730                         else
1731                                 offset += LL_DIR_END_OFF;
1732                         break;
1733                 default:
1734                         GOTO(out, ret);
1735         }
1736
1737         if (offset >= 0 &&
1738             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1739              (!api32 && offset <= LL_DIR_END_OFF))) {
1740                 if (offset != file->f_pos) {
1741                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1742                             (!api32 && offset == LL_DIR_END_OFF))
1743                                 fd->lfd_pos = MDS_DIR_END_OFF;
1744                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1745                                 fd->lfd_pos = offset << 32;
1746                         else
1747                                 fd->lfd_pos = offset;
1748                         file->f_pos = offset;
1749                         file->f_version = 0;
1750                 }
1751                 ret = offset;
1752         }
1753         GOTO(out, ret);
1754
1755 out:
1756         mutex_unlock(&inode->i_mutex);
1757         return ret;
1758 }
1759
1760 static int ll_dir_open(struct inode *inode, struct file *file)
1761 {
1762         ENTRY;
1763         RETURN(ll_file_open(inode, file));
1764 }
1765
1766 static int ll_dir_release(struct inode *inode, struct file *file)
1767 {
1768         ENTRY;
1769         RETURN(ll_file_release(inode, file));
1770 }
1771
1772 const struct file_operations ll_dir_operations = {
1773         .llseek         = ll_dir_seek,
1774         .open           = ll_dir_open,
1775         .release        = ll_dir_release,
1776         .read           = generic_read_dir,
1777 #ifdef HAVE_DIR_CONTEXT
1778         .iterate        = ll_iterate,
1779 #else
1780         .readdir        = ll_readdir,
1781 #endif
1782         .unlocked_ioctl = ll_dir_ioctl,
1783         .fsync          = ll_fsync,
1784 };