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_SIZE (if PAGE_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         put_page(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] dparent   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 dentry *dparent, struct lmv_user_md *lump,
 450                                const char *dirname, umode_t mode)
 451 {
 452         struct inode *parent = dparent->d_inode;
 453         struct ptlrpc_request *request = NULL;
 454         struct md_op_data *op_data;
 455         struct ll_sb_info *sbi = ll_i2sbi(parent);
 456         struct inode *inode = NULL;
 457         struct dentry dentry = {
 458                 .d_parent = dparent,
 459                 .d_name = {
 460                         .name = dirname,
 461                         .len = strlen(dirname),
 462                         .hash = full_name_hash(dirname, strlen(dirname)),
 463                 },
 464         };
 465         int err;
 466         ENTRY;
 467
 468         if (unlikely(lump->lum_magic != LMV_USER_MAGIC))
 469                 RETURN(-EINVAL);
 470
 471         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) name %s"
 472                "stripe_offset %d, stripe_count: %u\n",
 473                PFID(ll_inode2fid(parent)), parent, dirname,
 474                (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 475
 476         if (lump->lum_stripe_count > 1 &&
 477             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 478                 RETURN(-EINVAL);
 479
 480         if (IS_DEADDIR(parent) &&
 481             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 482                 RETURN(-ENOENT);
 483
 484         if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
 485                 lustre_swab_lmv_user_md(lump);
 486
 487         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 488                 mode &= ~current_umask();
 489         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 490         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 491                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 492                                      lump);
 493         if (IS_ERR(op_data))
 494                 RETURN(PTR_ERR(op_data));
 495
 496         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 497                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 498                  * to determine the security context for the file. So our fake
 499                  * dentry should be real enough for this purpose. */
 500                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 501                                               &op_data->op_file_secctx_name,
 502                                               &op_data->op_file_secctx,
 503                                               &op_data->op_file_secctx_size);
 504                 if (err < 0)
 505                         GOTO(out_op_data, err);
 506         }
 507
 508         op_data->op_cli_flags |= CLI_SET_MEA;
 509         err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
 510                         from_kuid(&init_user_ns, current_fsuid()),
 511                         from_kgid(&init_user_ns, current_fsgid()),
 512                         cfs_curproc_cap_pack(), 0, &request);
 513         if (err)
 514                 GOTO(out_request, err);
 515
 516         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 517
 518         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 519         if (err)
 520                 GOTO(out_inode, err);
 521
 522         dentry.d_inode = inode;
 523
 524         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
 525                 err = ll_inode_init_security(&dentry, inode, parent);
 526                 if (err)
 527                         GOTO(out_inode, err);
 528         }
 529
 530 out_inode:
 531         if (inode != NULL)
 532                 iput(inode);
 533 out_request:
 534         ptlrpc_req_finished(request);
 535 out_op_data:
 536         ll_finish_md_op_data(op_data);
 537
 538         return err;
 539 }
 540
 541 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 542                      int set_default)
 543 {
 544         struct ll_sb_info *sbi = ll_i2sbi(inode);
 545         struct md_op_data *op_data;
 546         struct ptlrpc_request *req = NULL;
 547         int rc = 0;
 548         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 549         struct obd_device *mgc = lsi->lsi_mgc;
 550         int lum_size;
 551         ENTRY;
 552
 553         if (lump != NULL) {
 554                 /*
 555                  * This is coming from userspace, so should be in
 556                  * local endian.  But the MDS would like it in little
 557                  * endian, so we swab it before we send it.
 558                  */
 559                 switch (lump->lmm_magic) {
 560                 case LOV_USER_MAGIC_V1: {
 561                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 562                                 lustre_swab_lov_user_md_v1(lump);
 563                         lum_size = sizeof(struct lov_user_md_v1);
 564                         break;
 565                 }
 566                 case LOV_USER_MAGIC_V3: {
 567                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 568                                 lustre_swab_lov_user_md_v3(
 569                                         (struct lov_user_md_v3 *)lump);
 570                         lum_size = sizeof(struct lov_user_md_v3);
 571                         break;
 572                 }
 573                 case LMV_USER_MAGIC: {
 574                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 575                                 lustre_swab_lmv_user_md(
 576                                         (struct lmv_user_md *)lump);
 577                         lum_size = sizeof(struct lmv_user_md);
 578                         break;
 579                 }
 580                 default: {
 581                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 582                                         " %#08x != %#08x nor %#08x\n",
 583                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 584                                         LOV_USER_MAGIC_V3);
 585                         RETURN(-EINVAL);
 586                 }
 587                 }
 588         } else {
 589                 lum_size = sizeof(struct lov_user_md_v1);
 590         }
 591
 592         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 593                                      LUSTRE_OPC_ANY, NULL);
 594         if (IS_ERR(op_data))
 595                 RETURN(PTR_ERR(op_data));
 596
 597         /* swabbing is done in lov_setstripe() on server side */
 598         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 599         ll_finish_md_op_data(op_data);
 600         ptlrpc_req_finished(req);
 601         if (rc)
 602                 RETURN(rc);
 603
 604 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
 605         /*
 606          * 2.9 server has stored filesystem default stripe in ROOT xattr,
 607          * and it's stored into system config for backward compatibility.
 608          *
 609          * In the following we use the fact that LOV_USER_MAGIC_V1 and
 610          * LOV_USER_MAGIC_V3 have the same initial fields so we do not
 611          * need the make the distiction between the 2 versions
 612          */
 613         if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
 614                 char *param = NULL;
 615                 char *buf;
 616
 617                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 618                 if (param == NULL)
 619                         GOTO(end, rc = -ENOMEM);
 620
 621                 buf = param;
 622                 /* Get fsname and assume devname to be -MDT0000. */
 623                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 624                 strcat(buf, "-MDT0000.lov");
 625                 buf += strlen(buf);
 626
 627                 /* Set root stripesize */
 628                 sprintf(buf, ".stripesize=%u",
 629                         lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 630                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 631                 if (rc)
 632                         GOTO(end, rc);
 633
 634                 /* Set root stripecount */
 635                 sprintf(buf, ".stripecount=%hd",
 636                         lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 637                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 638                 if (rc)
 639                         GOTO(end, rc);
 640
 641                 /* Set root stripeoffset */
 642                 sprintf(buf, ".stripeoffset=%hd",
 643                         lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 644                         (typeof(lump->lmm_stripe_offset))(-1));
 645                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 646
 647 end:
 648                 if (param != NULL)
 649                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 650         }
 651 #endif
 652         RETURN(rc);
 653 }
 654
 655 /**
 656  * This function will be used to get default LOV/LMV/Default LMV
 657  * @valid will be used to indicate which stripe it will retrieve
 658  *      OBD_MD_MEA              LMV stripe EA
 659  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 660  *      otherwise               Default LOV EA.
 661  * Each time, it can only retrieve 1 stripe EA
 662  **/
 663 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 664                      struct ptlrpc_request **request, u64 valid)
 665 {
 666         struct ll_sb_info *sbi = ll_i2sbi(inode);
 667         struct mdt_body   *body;
 668         struct lov_mds_md *lmm = NULL;
 669         struct ptlrpc_request *req = NULL;
 670         int rc, lmm_size;
 671         struct md_op_data *op_data;
 672         ENTRY;
 673
 674         rc = ll_get_default_mdsize(sbi, &lmm_size);
 675         if (rc)
 676                 RETURN(rc);
 677
 678         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 679                                      0, lmm_size, LUSTRE_OPC_ANY,
 680                                      NULL);
 681         if (IS_ERR(op_data))
 682                 RETURN(PTR_ERR(op_data));
 683
 684         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 685         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 686         ll_finish_md_op_data(op_data);
 687         if (rc < 0) {
 688                 CDEBUG(D_INFO, "md_getattr failed on inode "
 689                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 690                 GOTO(out, rc);
 691         }
 692
 693         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 694         LASSERT(body != NULL);
 695
 696         lmm_size = body->mbo_eadatasize;
 697
 698         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 699             lmm_size == 0) {
 700                 GOTO(out, rc = -ENODATA);
 701         }
 702
 703         lmm = req_capsule_server_sized_get(&req->rq_pill,
 704                                            &RMF_MDT_MD, lmm_size);
 705         LASSERT(lmm != NULL);
 706
 707         /*
 708          * This is coming from the MDS, so is probably in
 709          * little endian.  We convert it to host endian before
 710          * passing it to userspace.
 711          */
 712         /* We don't swab objects for directories */
 713         switch (le32_to_cpu(lmm->lmm_magic)) {
 714         case LOV_MAGIC_V1:
 715                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 716                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 717                 break;
 718         case LOV_MAGIC_V3:
 719                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 720                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 721                 break;
 722         case LMV_MAGIC_V1:
 723                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 724                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 725                 break;
 726         case LMV_USER_MAGIC:
 727                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 728                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 729                 break;
 730         default:
 731                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 732                 rc = -EPROTO;
 733         }
 734 out:
 735         *plmm = lmm;
 736         *plmm_size = lmm_size;
 737         *request = req;
 738         return rc;
 739 }
 740
 741 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 742 {
 743         struct md_op_data       *op_data;
 744         int                     rc;
 745         int                     mdt_index;
 746         ENTRY;
 747
 748         OBD_ALLOC_PTR(op_data);
 749         if (op_data == NULL)
 750                 RETURN(-ENOMEM);
 751
 752         op_data->op_flags |= MF_GET_MDT_IDX;
 753         op_data->op_fid1 = *fid;
 754         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 755         mdt_index = op_data->op_mds;
 756         OBD_FREE_PTR(op_data);
 757         if (rc < 0)
 758                 RETURN(rc);
 759
 760         RETURN(mdt_index);
 761 }
 762
 763 /*
 764  *  Get MDT index for the inode.
 765  */
 766 int ll_get_mdt_idx(struct inode *inode)
 767 {
 768         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 769 }
 770
 771 /**
 772  * Generic handler to do any pre-copy work.
 773  *
 774  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 775  * first information for it that real work has started.
 776  *
 777  * Moreover, for a ARCHIVE request, it will sample the file data version and
 778  * store it in \a copy.
 779  *
 780  * \return 0 on success.
 781  */
 782 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 783 {
 784         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 785         struct hsm_progress_kernel       hpk;
 786         int                              rc = 0;
 787         int                              rc2;
 788         ENTRY;
 789
 790         /* Forge a hsm_progress based on data from copy. */
 791         hpk.hpk_fid = copy->hc_hai.hai_fid;
 792         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 793         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 794         hpk.hpk_extent.length = 0;
 795         hpk.hpk_flags = 0;
 796         hpk.hpk_errval = 0;
 797         hpk.hpk_data_version = 0;
 798
 799
 800         /* For archive request, we need to read the current file version. */
 801         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 802                 struct inode    *inode;
 803                 __u64            data_version = 0;
 804
 805                 /* Get inode for this fid */
 806                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 807                 if (IS_ERR(inode)) {
 808                         hpk.hpk_flags |= HP_FLAG_RETRY;
 809                         /* hpk_errval is >= 0 */
 810                         hpk.hpk_errval = -PTR_ERR(inode);
 811                         GOTO(progress, rc = PTR_ERR(inode));
 812                 }
 813
 814                 /* Read current file data version */
 815                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 816                 iput(inode);
 817                 if (rc != 0) {
 818                         CDEBUG(D_HSM, "Could not read file data version of "
 819                                       DFID" (rc = %d). Archive request ("
 820                                       "%#llx) could not be done.\n",
 821                                       PFID(&copy->hc_hai.hai_fid), rc,
 822                                       copy->hc_hai.hai_cookie);
 823                         hpk.hpk_flags |= HP_FLAG_RETRY;
 824                         /* hpk_errval must be >= 0 */
 825                         hpk.hpk_errval = -rc;
 826                         GOTO(progress, rc);
 827                 }
 828
 829                 /* Store in the hsm_copy for later copytool use.
 830                  * Always modified even if no lsm. */
 831                 copy->hc_data_version = data_version;
 832         }
 833
 834 progress:
 835         /* On error, the request should be considered as completed */
 836         if (hpk.hpk_errval > 0)
 837                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 838
 839         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 840                             &hpk, NULL);
 841
 842         /* Return first error */
 843         RETURN(rc != 0 ? rc : rc2);
 844 }
 845
 846 /**
 847  * Generic handler to do any post-copy work.
 848  *
 849  * It will send the last hsm_progress update to coordinator to inform it
 850  * that copy is finished and whether it was successful or not.
 851  *
 852  * Moreover,
 853  * - for ARCHIVE request, it will sample the file data version and compare it
 854  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 855  *   will be considered as failed.
 856  * - for RESTORE request, it will sample the file data version and send it to
 857  *   coordinator which is useful if the file was imported as 'released'.
 858  *
 859  * \return 0 on success.
 860  */
 861 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 862 {
 863         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 864         struct hsm_progress_kernel       hpk;
 865         int                              rc = 0;
 866         int                              rc2;
 867         ENTRY;
 868
 869         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 870         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 871          * initialized if copy_end was called with copy == NULL.
 872          */
 873
 874         /* Forge a hsm_progress based on data from copy. */
 875         hpk.hpk_fid = copy->hc_hai.hai_fid;
 876         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 877         hpk.hpk_extent = copy->hc_hai.hai_extent;
 878         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 879         hpk.hpk_errval = copy->hc_errval;
 880         hpk.hpk_data_version = 0;
 881
 882         /* For archive request, we need to check the file data was not changed.
 883          *
 884          * For restore request, we need to send the file data version, this is
 885          * useful when the file was created using hsm_import.
 886          */
 887         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 888              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 889             (copy->hc_errval == 0)) {
 890                 struct inode    *inode;
 891                 __u64            data_version = 0;
 892
 893                 /* Get lsm for this fid */
 894                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 895                 if (IS_ERR(inode)) {
 896                         hpk.hpk_flags |= HP_FLAG_RETRY;
 897                         /* hpk_errval must be >= 0 */
 898                         hpk.hpk_errval = -PTR_ERR(inode);
 899                         GOTO(progress, rc = PTR_ERR(inode));
 900                 }
 901
 902                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 903                 iput(inode);
 904                 if (rc) {
 905                         CDEBUG(D_HSM, "Could not read file data version. "
 906                                       "Request could not be confirmed.\n");
 907                         if (hpk.hpk_errval == 0)
 908                                 hpk.hpk_errval = -rc;
 909                         GOTO(progress, rc);
 910                 }
 911
 912                 /* Store in the hsm_copy for later copytool use.
 913                  * Always modified even if no lsm. */
 914                 hpk.hpk_data_version = data_version;
 915
 916                 /* File could have been stripped during archiving, so we need
 917                  * to check anyway. */
 918                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 919                     (copy->hc_data_version != data_version)) {
 920                         CDEBUG(D_HSM, "File data version mismatched. "
 921                               "File content was changed during archiving. "
 922                                DFID", start:%#llx current:%#llx\n",
 923                                PFID(&copy->hc_hai.hai_fid),
 924                                copy->hc_data_version, data_version);
 925                         /* File was changed, send error to cdt. Do not ask for
 926                          * retry because if a file is modified frequently,
 927                          * the cdt will loop on retried archive requests.
 928                          * The policy engine will ask for a new archive later
 929                          * when the file will not be modified for some tunable
 930                          * time */
 931                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 932                         rc = -EBUSY;
 933                         /* hpk_errval must be >= 0 */
 934                         hpk.hpk_errval = -rc;
 935                         GOTO(progress, rc);
 936                 }
 937
 938         }
 939
 940 progress:
 941         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 942                             &hpk, NULL);
 943
 944         /* Return first error */
 945         RETURN(rc != 0 ? rc : rc2);
 946 }
 947
 948
 949 static int copy_and_ioctl(int cmd, struct obd_export *exp,
 950                           const void __user *data, size_t size)
 951 {
 952         void *copy;
 953         int rc;
 954
 955         OBD_ALLOC(copy, size);
 956         if (copy == NULL)
 957                 return -ENOMEM;
 958
 959         if (copy_from_user(copy, data, size)) {
 960                 rc = -EFAULT;
 961                 goto out;
 962         }
 963
 964         rc = obd_iocontrol(cmd, exp, size, copy, NULL);
 965 out:
 966         OBD_FREE(copy, size);
 967
 968         return rc;
 969 }
 970
 971 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
 972 {
 973         int cmd = qctl->qc_cmd;
 974         int type = qctl->qc_type;
 975         int id = qctl->qc_id;
 976         int valid = qctl->qc_valid;
 977         int rc = 0;
 978         ENTRY;
 979
 980         switch (cmd) {
 981         case Q_SETQUOTA:
 982         case Q_SETINFO:
 983                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
 984                         RETURN(-EPERM);
 985                 break;
 986         case Q_GETQUOTA:
 987                 if (((type == USRQUOTA &&
 988                       !uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
 989                      (type == GRPQUOTA &&
 990                       !in_egroup_p(make_kgid(&init_user_ns, id)))) &&
 991                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
 992                         RETURN(-EPERM);
 993                 break;
 994         case Q_GETINFO:
 995                 break;
 996         default:
 997                 CERROR("unsupported quotactl op: %#x\n", cmd);
 998                 RETURN(-ENOTTY);
 999         }
1000
1001         if (valid != QC_GENERAL) {
1002                 if (cmd == Q_GETINFO)
1003                         qctl->qc_cmd = Q_GETOINFO;
1004                 else if (cmd == Q_GETQUOTA)
1005                         qctl->qc_cmd = Q_GETOQUOTA;
1006                 else
1007                         RETURN(-EINVAL);
1008
1009                 switch (valid) {
1010                 case QC_MDTIDX:
1011                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1012                                            sizeof(*qctl), qctl, NULL);
1013                         break;
1014                 case QC_OSTIDX:
1015                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1016                                            sizeof(*qctl), qctl, NULL);
1017                         break;
1018                 case QC_UUID:
1019                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1020                                            sizeof(*qctl), qctl, NULL);
1021                         if (rc == -EAGAIN)
1022                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1023                                                    sbi->ll_dt_exp,
1024                                                    sizeof(*qctl), qctl, NULL);
1025                         break;
1026                 default:
1027                         rc = -EINVAL;
1028                         break;
1029                 }
1030
1031                 if (rc)
1032                         RETURN(rc);
1033
1034                 qctl->qc_cmd = cmd;
1035         } else {
1036                 struct obd_quotactl *oqctl;
1037
1038                 OBD_ALLOC_PTR(oqctl);
1039                 if (oqctl == NULL)
1040                         RETURN(-ENOMEM);
1041
1042                 QCTL_COPY(oqctl, qctl);
1043                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1044                 if (rc) {
1045                         OBD_FREE_PTR(oqctl);
1046                         RETURN(rc);
1047                 }
1048                 /* If QIF_SPACE is not set, client should collect the
1049                  * space usage from OSSs by itself */
1050                 if (cmd == Q_GETQUOTA &&
1051                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1052                     !oqctl->qc_dqblk.dqb_curspace) {
1053                         struct obd_quotactl *oqctl_tmp;
1054
1055                         OBD_ALLOC_PTR(oqctl_tmp);
1056                         if (oqctl_tmp == NULL)
1057                                 GOTO(out, rc = -ENOMEM);
1058
1059                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1060                         oqctl_tmp->qc_id = oqctl->qc_id;
1061                         oqctl_tmp->qc_type = oqctl->qc_type;
1062
1063                         /* collect space usage from OSTs */
1064                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1065                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1066                         if (!rc || rc == -EREMOTEIO) {
1067                                 oqctl->qc_dqblk.dqb_curspace =
1068                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1069                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1070                         }
1071
1072                         /* collect space & inode usage from MDTs */
1073                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1074                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1075                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1076                         if (!rc || rc == -EREMOTEIO) {
1077                                 oqctl->qc_dqblk.dqb_curspace +=
1078                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1079                                 oqctl->qc_dqblk.dqb_curinodes =
1080                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1081                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1082                         } else {
1083                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1084                         }
1085
1086                         OBD_FREE_PTR(oqctl_tmp);
1087                 }
1088 out:
1089                 QCTL_COPY(qctl, oqctl);
1090                 OBD_FREE_PTR(oqctl);
1091         }
1092
1093         RETURN(rc);
1094 }
1095
1096 /* This function tries to get a single name component,
1097  * to send to the server. No actual path traversal involved,
1098  * so we limit to NAME_MAX */
1099 static char *ll_getname(const char __user *filename)
1100 {
1101         int ret = 0, len;
1102         char *tmp;
1103
1104         OBD_ALLOC(tmp, NAME_MAX + 1);
1105
1106         if (!tmp)
1107                 return ERR_PTR(-ENOMEM);
1108
1109         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1110         if (len < 0)
1111                 ret = -ENOENT;
1112         else if (len > NAME_MAX)
1113                 ret = -ENAMETOOLONG;
1114
1115         if (ret) {
1116                 OBD_FREE(tmp, NAME_MAX + 1);
1117                 tmp =  ERR_PTR(ret);
1118         }
1119         return tmp;
1120 }
1121
1122 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1123
1124 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1125 {
1126         struct dentry *dentry = file_dentry(file);
1127         struct inode *inode = file_inode(file);
1128         struct ll_sb_info *sbi = ll_i2sbi(inode);
1129         struct obd_ioctl_data *data;
1130         int rc = 0;
1131         ENTRY;
1132
1133         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1134                PFID(ll_inode2fid(inode)), inode, cmd);
1135
1136         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1137         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1138                 return -ENOTTY;
1139
1140         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1141         switch(cmd) {
1142         case FSFILT_IOC_GETFLAGS:
1143         case FSFILT_IOC_SETFLAGS:
1144                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1145         case FSFILT_IOC_GETVERSION_OLD:
1146         case FSFILT_IOC_GETVERSION:
1147                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1148         /* We need to special case any other ioctls we want to handle,
1149          * to send them to the MDS/OST as appropriate and to properly
1150          * network encode the arg field.
1151         case FSFILT_IOC_SETVERSION_OLD:
1152         case FSFILT_IOC_SETVERSION:
1153         */
1154         case LL_IOC_GET_MDTIDX: {
1155                 int mdtidx;
1156
1157                 mdtidx = ll_get_mdt_idx(inode);
1158                 if (mdtidx < 0)
1159                         RETURN(mdtidx);
1160
1161                 if (put_user((int)mdtidx, (int __user *)arg))
1162                         RETURN(-EFAULT);
1163
1164                 return 0;
1165         }
1166         case IOC_MDC_LOOKUP: {
1167                 int namelen, len = 0;
1168                 char *buf = NULL;
1169                 char *filename;
1170
1171                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1172                 if (rc != 0)
1173                         RETURN(rc);
1174                 data = (void *)buf;
1175
1176                 filename = data->ioc_inlbuf1;
1177                 namelen = strlen(filename);
1178                 if (namelen < 1) {
1179                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1180                         GOTO(out_free, rc = -EINVAL);
1181                 }
1182
1183                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1184                 if (rc < 0) {
1185                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1186                                ll_get_fsname(inode->i_sb, NULL, 0), namelen,
1187                                filename, rc);
1188                         GOTO(out_free, rc);
1189                 }
1190 out_free:
1191                 obd_ioctl_freedata(buf, len);
1192                 return rc;
1193         }
1194         case LL_IOC_LMV_SETSTRIPE: {
1195                 struct lmv_user_md  *lum;
1196                 char            *buf = NULL;
1197                 char            *filename;
1198                 int              namelen = 0;
1199                 int              lumlen = 0;
1200                 umode_t          mode;
1201                 int              len;
1202                 int              rc;
1203
1204                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1205                 if (rc)
1206                         RETURN(rc);
1207
1208                 data = (void *)buf;
1209                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1210                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1211                         GOTO(lmv_out_free, rc = -EINVAL);
1212
1213                 filename = data->ioc_inlbuf1;
1214                 namelen = data->ioc_inllen1;
1215
1216                 if (namelen < 1) {
1217                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1218                         GOTO(lmv_out_free, rc = -EINVAL);
1219                 }
1220                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1221                 lumlen = data->ioc_inllen2;
1222
1223                 if (lum->lum_magic != LMV_USER_MAGIC ||
1224                     lumlen != sizeof(*lum)) {
1225                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1226                                filename, lum->lum_magic, lumlen, -EFAULT);
1227                         GOTO(lmv_out_free, rc = -EINVAL);
1228                 }
1229
1230 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1231                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1232 #else
1233                 mode = data->ioc_type;
1234 #endif
1235                 rc = ll_dir_setdirstripe(dentry, lum, filename, mode);
1236 lmv_out_free:
1237                 obd_ioctl_freedata(buf, len);
1238                 RETURN(rc);
1239
1240         }
1241         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1242                 struct lmv_user_md        lum;
1243                 struct lmv_user_md __user *ulump =
1244                                         (struct lmv_user_md __user *)arg;
1245                 int                       rc;
1246
1247                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1248                         RETURN(-EFAULT);
1249
1250                 if (lum.lum_magic != LMV_USER_MAGIC)
1251                         RETURN(-EINVAL);
1252
1253                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1254
1255                 RETURN(rc);
1256         }
1257         case LL_IOC_LOV_SETSTRIPE: {
1258                 struct lov_user_md_v3 lumv3;
1259                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1260                 struct lov_user_md_v1 __user *lumv1p =
1261                         (struct lov_user_md_v1 __user *)arg;
1262                 struct lov_user_md_v3 __user *lumv3p =
1263                         (struct lov_user_md_v3 __user *)arg;
1264
1265                 int set_default = 0;
1266
1267                 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1268                 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1269                         sizeof(lumv3p->lmm_objects[0]));
1270                 /* first try with v1 which is smaller than v3 */
1271                 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1272                         RETURN(-EFAULT);
1273
1274                 if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
1275                         if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1276                                 RETURN(-EFAULT);
1277                 }
1278
1279                 if (inode->i_sb->s_root == file_dentry(file))
1280                         set_default = 1;
1281
1282                 /* in v1 and v3 cases lumv1 points to data */
1283                 rc = ll_dir_setstripe(inode, lumv1, set_default);
1284
1285                 RETURN(rc);
1286         }
1287         case LL_IOC_LMV_GETSTRIPE: {
1288                 struct lmv_user_md __user *ulmv =
1289                                         (struct lmv_user_md __user *)arg;
1290                 struct lmv_user_md      lum;
1291                 struct ptlrpc_request   *request = NULL;
1292                 union lmv_mds_md        *lmm = NULL;
1293                 int                     lmmsize;
1294                 u64                     valid = 0;
1295                 struct lmv_user_md      *tmp = NULL;
1296                 int                     mdt_index;
1297                 int                     lum_size;
1298                 int                     stripe_count;
1299                 int                     max_stripe_count;
1300                 int                     i;
1301                 int                     rc;
1302
1303                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1304                         RETURN(-EFAULT);
1305
1306                 max_stripe_count = lum.lum_stripe_count;
1307                 /* lum_magic will indicate which stripe the ioctl will like
1308                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1309                  * is for default LMV stripe */
1310                 if (lum.lum_magic == LMV_MAGIC_V1)
1311                         valid |= OBD_MD_MEA;
1312                 else if (lum.lum_magic == LMV_USER_MAGIC)
1313                         valid |= OBD_MD_DEFAULT_MEA;
1314                 else
1315                         RETURN(-EINVAL);
1316
1317                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1318                                       valid);
1319                 if (rc != 0)
1320                         GOTO(finish_req, rc);
1321
1322                 /* Get default LMV EA */
1323                 if (lum.lum_magic == LMV_USER_MAGIC) {
1324                         if (lmmsize > sizeof(*ulmv))
1325                                 GOTO(finish_req, rc = -EINVAL);
1326
1327                         if (copy_to_user(ulmv, lmm, lmmsize))
1328                                 GOTO(finish_req, rc = -EFAULT);
1329
1330                         GOTO(finish_req, rc);
1331                 }
1332
1333                 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1334                 if (max_stripe_count < stripe_count) {
1335                         lum.lum_stripe_count = stripe_count;
1336                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1337                                 GOTO(finish_req, rc = -EFAULT);
1338                         GOTO(finish_req, rc = -E2BIG);
1339                 }
1340
1341                 lum_size = lmv_user_md_size(stripe_count, LMV_MAGIC_V1);
1342                 OBD_ALLOC(tmp, lum_size);
1343                 if (tmp == NULL)
1344                         GOTO(finish_req, rc = -ENOMEM);
1345
1346                 mdt_index = ll_get_mdt_idx(inode);
1347                 if (mdt_index < 0)
1348                         GOTO(out_tmp, rc = -ENOMEM);
1349
1350                 tmp->lum_magic = LMV_MAGIC_V1;
1351                 tmp->lum_stripe_count = 0;
1352                 tmp->lum_stripe_offset = mdt_index;
1353                 for (i = 0; i < stripe_count; i++) {
1354                         struct lu_fid   fid;
1355
1356                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1357                         mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1358                         if (mdt_index < 0)
1359                                 GOTO(out_tmp, rc = mdt_index);
1360
1361                         tmp->lum_objects[i].lum_mds = mdt_index;
1362                         tmp->lum_objects[i].lum_fid = fid;
1363                         tmp->lum_stripe_count++;
1364                 }
1365
1366                 if (copy_to_user(ulmv, tmp, lum_size))
1367                         GOTO(out_tmp, rc = -EFAULT);
1368 out_tmp:
1369                 OBD_FREE(tmp, lum_size);
1370 finish_req:
1371                 ptlrpc_req_finished(request);
1372                 return rc;
1373         }
1374
1375         case LL_IOC_REMOVE_ENTRY: {
1376                 char            *filename = NULL;
1377                 int              namelen = 0;
1378                 int              rc;
1379
1380                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1381                  * unsupported server, which might crash the server(LU-2730),
1382                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1383                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1384                  * server will support REINT_RMENTRY XXX*/
1385                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1386                         RETURN(-ENOTSUPP);
1387
1388                 filename = ll_getname((const char __user *)arg);
1389                 if (IS_ERR(filename))
1390                         RETURN(PTR_ERR(filename));
1391
1392                 namelen = strlen(filename);
1393                 if (namelen < 1)
1394                         GOTO(out_rmdir, rc = -EINVAL);
1395
1396                 rc = ll_rmdir_entry(inode, filename, namelen);
1397 out_rmdir:
1398                 if (filename)
1399                         ll_putname(filename);
1400                 RETURN(rc);
1401         }
1402         case LL_IOC_LOV_SWAP_LAYOUTS:
1403                 RETURN(-EPERM);
1404         case IOC_OBD_STATFS:
1405                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1406         case LL_IOC_LOV_GETSTRIPE:
1407         case LL_IOC_MDC_GETINFO:
1408         case IOC_MDC_GETFILEINFO:
1409         case IOC_MDC_GETFILESTRIPE: {
1410                 struct ptlrpc_request *request = NULL;
1411                 struct lov_user_md __user *lump;
1412                 struct lov_mds_md *lmm = NULL;
1413                 struct mdt_body *body;
1414                 char *filename = NULL;
1415                 int lmmsize;
1416
1417                 if (cmd == IOC_MDC_GETFILEINFO ||
1418                     cmd == IOC_MDC_GETFILESTRIPE) {
1419                         filename = ll_getname((const char __user *)arg);
1420                         if (IS_ERR(filename))
1421                                 RETURN(PTR_ERR(filename));
1422
1423                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1424                                                       &lmmsize, &request);
1425                 } else {
1426                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1427                                               &request, 0);
1428                 }
1429
1430                 if (request) {
1431                         body = req_capsule_server_get(&request->rq_pill,
1432                                                       &RMF_MDT_BODY);
1433                         LASSERT(body != NULL);
1434                 } else {
1435                         GOTO(out_req, rc);
1436                 }
1437
1438                 if (rc < 0) {
1439                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1440                                                cmd == LL_IOC_MDC_GETINFO))
1441                                 GOTO(skip_lmm, rc = 0);
1442                         else
1443                                 GOTO(out_req, rc);
1444                 }
1445
1446                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1447                     cmd == LL_IOC_LOV_GETSTRIPE) {
1448                         lump = (struct lov_user_md __user *)arg;
1449                 } else {
1450                         struct lov_user_mds_data __user *lmdp;
1451                         lmdp = (struct lov_user_mds_data __user *)arg;
1452                         lump = &lmdp->lmd_lmm;
1453                 }
1454                 if (copy_to_user(lump, lmm, lmmsize)) {
1455                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1456                                 GOTO(out_req, rc = -EFAULT);
1457                         rc = -EOVERFLOW;
1458                 }
1459         skip_lmm:
1460                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1461                         struct lov_user_mds_data __user *lmdp;
1462                         lstat_t st = { 0 };
1463
1464                         st.st_dev       = inode->i_sb->s_dev;
1465                         st.st_mode      = body->mbo_mode;
1466                         st.st_nlink     = body->mbo_nlink;
1467                         st.st_uid       = body->mbo_uid;
1468                         st.st_gid       = body->mbo_gid;
1469                         st.st_rdev      = body->mbo_rdev;
1470                         st.st_size      = body->mbo_size;
1471                         st.st_blksize   = PAGE_SIZE;
1472                         st.st_blocks    = body->mbo_blocks;
1473                         st.st_atime     = body->mbo_atime;
1474                         st.st_mtime     = body->mbo_mtime;
1475                         st.st_ctime     = body->mbo_ctime;
1476                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1477                                                 sbi->ll_flags &
1478                                                 LL_SBI_32BIT_API);
1479
1480                         lmdp = (struct lov_user_mds_data __user *)arg;
1481                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1482                                 GOTO(out_req, rc = -EFAULT);
1483                 }
1484
1485                 EXIT;
1486         out_req:
1487                 ptlrpc_req_finished(request);
1488                 if (filename)
1489                         ll_putname(filename);
1490                 return rc;
1491         }
1492         case OBD_IOC_QUOTACTL: {
1493                 struct if_quotactl *qctl;
1494
1495                 OBD_ALLOC_PTR(qctl);
1496                 if (!qctl)
1497                         RETURN(-ENOMEM);
1498
1499                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1500                         GOTO(out_quotactl, rc = -EFAULT);
1501
1502                 rc = quotactl_ioctl(sbi, qctl);
1503
1504                 if (rc == 0 &&
1505                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1506                         rc = -EFAULT;
1507
1508         out_quotactl:
1509                 OBD_FREE_PTR(qctl);
1510                 RETURN(rc);
1511         }
1512         case OBD_IOC_GETDTNAME:
1513         case OBD_IOC_GETMDNAME:
1514                 RETURN(ll_get_obd_name(inode, cmd, arg));
1515         case LL_IOC_FLUSHCTX:
1516                 RETURN(ll_flush_ctx(inode));
1517         case LL_IOC_GETOBDCOUNT: {
1518                 u32 count, vallen;
1519                 struct obd_export *exp;
1520
1521                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1522                         RETURN(-EFAULT);
1523
1524                 /* get ost count when count is zero, get mdt count otherwise */
1525                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1526                 vallen = sizeof(count);
1527                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1528                                   KEY_TGT_COUNT, &vallen, &count);
1529                 if (rc) {
1530                         CERROR("get target count failed: %d\n", rc);
1531                         RETURN(rc);
1532                 }
1533
1534                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1535                         RETURN(-EFAULT);
1536
1537                 RETURN(0);
1538         }
1539         case LL_IOC_PATH2FID:
1540                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1541                                      sizeof(struct lu_fid)))
1542                         RETURN(-EFAULT);
1543                 RETURN(0);
1544         case LL_IOC_GET_CONNECT_FLAGS: {
1545                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1546                                      (void __user *)arg));
1547         }
1548         case OBD_IOC_CHANGELOG_SEND:
1549         case OBD_IOC_CHANGELOG_CLEAR:
1550                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1551                         RETURN(-EPERM);
1552
1553                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1554                                     sizeof(struct ioc_changelog));
1555                 RETURN(rc);
1556         case OBD_IOC_FID2PATH:
1557                 RETURN(ll_fid2path(inode, (void __user *)arg));
1558         case LL_IOC_GETPARENT:
1559                 RETURN(ll_getparent(file, (void __user *)arg));
1560         case LL_IOC_FID2MDTIDX: {
1561                 struct obd_export *exp = ll_i2mdexp(inode);
1562                 struct lu_fid     fid;
1563                 __u32             index;
1564
1565                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1566                                    sizeof(fid)))
1567                         RETURN(-EFAULT);
1568
1569                 /* Call mdc_iocontrol */
1570                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1571                                    (__u32 __user *)&index);
1572                 if (rc != 0)
1573                         RETURN(rc);
1574
1575                 RETURN(index);
1576         }
1577         case LL_IOC_HSM_REQUEST: {
1578                 struct hsm_user_request *hur;
1579                 ssize_t                  totalsize;
1580
1581                 OBD_ALLOC_PTR(hur);
1582                 if (hur == NULL)
1583                         RETURN(-ENOMEM);
1584
1585                 /* We don't know the true size yet; copy the fixed-size part */
1586                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1587                         OBD_FREE_PTR(hur);
1588                         RETURN(-EFAULT);
1589                 }
1590
1591                 /* Compute the whole struct size */
1592                 totalsize = hur_len(hur);
1593                 OBD_FREE_PTR(hur);
1594                 if (totalsize < 0)
1595                         RETURN(-E2BIG);
1596
1597                 /* Final size will be more than double totalsize */
1598                 if (totalsize >= MDS_MAXREQSIZE / 3)
1599                         RETURN(-E2BIG);
1600
1601                 OBD_ALLOC_LARGE(hur, totalsize);
1602                 if (hur == NULL)
1603                         RETURN(-ENOMEM);
1604
1605                 /* Copy the whole struct */
1606                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1607                         GOTO(out_hur, rc = -EFAULT);
1608
1609                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1610                         const struct lu_fid *fid;
1611                         struct inode *f;
1612                         int i;
1613
1614                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1615                                 fid = &hur->hur_user_item[i].hui_fid;
1616                                 f = search_inode_for_lustre(inode->i_sb, fid);
1617                                 if (IS_ERR(f)) {
1618                                         rc = PTR_ERR(f);
1619                                         break;
1620                                 }
1621
1622                                 rc = ll_hsm_release(f);
1623                                 iput(f);
1624                                 if (rc != 0)
1625                                         break;
1626                         }
1627                 } else {
1628                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1629                                            hur, NULL);
1630                 }
1631
1632 out_hur:
1633                 OBD_FREE_LARGE(hur, totalsize);
1634
1635                 RETURN(rc);
1636         }
1637         case LL_IOC_HSM_PROGRESS: {
1638                 struct hsm_progress_kernel      hpk;
1639                 struct hsm_progress             hp;
1640
1641                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1642                         RETURN(-EFAULT);
1643
1644                 hpk.hpk_fid = hp.hp_fid;
1645                 hpk.hpk_cookie = hp.hp_cookie;
1646                 hpk.hpk_extent = hp.hp_extent;
1647                 hpk.hpk_flags = hp.hp_flags;
1648                 hpk.hpk_errval = hp.hp_errval;
1649                 hpk.hpk_data_version = 0;
1650
1651                 /* File may not exist in Lustre; all progress
1652                  * reported to Lustre root */
1653                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1654                                    NULL);
1655                 RETURN(rc);
1656         }
1657         case LL_IOC_HSM_CT_START:
1658                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1659                         RETURN(-EPERM);
1660
1661                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1662                                     sizeof(struct lustre_kernelcomm));
1663                 RETURN(rc);
1664
1665         case LL_IOC_HSM_COPY_START: {
1666                 struct hsm_copy *copy;
1667                 int              rc;
1668
1669                 OBD_ALLOC_PTR(copy);
1670                 if (copy == NULL)
1671                         RETURN(-ENOMEM);
1672                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1673                         OBD_FREE_PTR(copy);
1674                         RETURN(-EFAULT);
1675                 }
1676
1677                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1678                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1679                         rc = -EFAULT;
1680
1681                 OBD_FREE_PTR(copy);
1682                 RETURN(rc);
1683         }
1684         case LL_IOC_HSM_COPY_END: {
1685                 struct hsm_copy *copy;
1686                 int              rc;
1687
1688                 OBD_ALLOC_PTR(copy);
1689                 if (copy == NULL)
1690                         RETURN(-ENOMEM);
1691                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1692                         OBD_FREE_PTR(copy);
1693                         RETURN(-EFAULT);
1694                 }
1695
1696                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1697                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1698                         rc = -EFAULT;
1699
1700                 OBD_FREE_PTR(copy);
1701                 RETURN(rc);
1702         }
1703         case LL_IOC_MIGRATE: {
1704                 char            *buf = NULL;
1705                 const char      *filename;
1706                 int             namelen = 0;
1707                 int             len;
1708                 int             rc;
1709                 int             mdtidx;
1710
1711                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1712                 if (rc < 0)
1713                         RETURN(rc);
1714
1715                 data = (struct obd_ioctl_data *)buf;
1716                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1717                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1718                         GOTO(migrate_free, rc = -EINVAL);
1719
1720                 filename = data->ioc_inlbuf1;
1721                 namelen = data->ioc_inllen1;
1722                 /* \0 is packed at the end of filename */
1723                 if (namelen < 1 || namelen != strlen(filename) + 1)
1724                         GOTO(migrate_free, rc = -EINVAL);
1725
1726                 if (data->ioc_inllen2 != sizeof(mdtidx))
1727                         GOTO(migrate_free, rc = -EINVAL);
1728                 mdtidx = *(int *)data->ioc_inlbuf2;
1729
1730                 rc = ll_migrate(inode, file, mdtidx, filename, namelen - 1);
1731 migrate_free:
1732                 obd_ioctl_freedata(buf, len);
1733
1734                 RETURN(rc);
1735         }
1736         default:
1737                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1738                                      (void __user *)arg));
1739         }
1740 }
1741
1742 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1743 {
1744         struct inode *inode = file->f_mapping->host;
1745         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1746         struct ll_sb_info *sbi = ll_i2sbi(inode);
1747         int api32 = ll_need_32bit_api(sbi);
1748         loff_t ret = -EINVAL;
1749         ENTRY;
1750
1751         inode_lock(inode);
1752         switch (origin) {
1753                 case SEEK_SET:
1754                         break;
1755                 case SEEK_CUR:
1756                         offset += file->f_pos;
1757                         break;
1758                 case SEEK_END:
1759                         if (offset > 0)
1760                                 GOTO(out, ret);
1761                         if (api32)
1762                                 offset += LL_DIR_END_OFF_32BIT;
1763                         else
1764                                 offset += LL_DIR_END_OFF;
1765                         break;
1766                 default:
1767                         GOTO(out, ret);
1768         }
1769
1770         if (offset >= 0 &&
1771             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1772              (!api32 && offset <= LL_DIR_END_OFF))) {
1773                 if (offset != file->f_pos) {
1774                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1775                             (!api32 && offset == LL_DIR_END_OFF))
1776                                 fd->lfd_pos = MDS_DIR_END_OFF;
1777                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1778                                 fd->lfd_pos = offset << 32;
1779                         else
1780                                 fd->lfd_pos = offset;
1781                         file->f_pos = offset;
1782                         file->f_version = 0;
1783                 }
1784                 ret = offset;
1785         }
1786         GOTO(out, ret);
1787
1788 out:
1789         inode_unlock(inode);
1790         return ret;
1791 }
1792
1793 static int ll_dir_open(struct inode *inode, struct file *file)
1794 {
1795         ENTRY;
1796         RETURN(ll_file_open(inode, file));
1797 }
1798
1799 static int ll_dir_release(struct inode *inode, struct file *file)
1800 {
1801         ENTRY;
1802         RETURN(ll_file_release(inode, file));
1803 }
1804
1805 const struct file_operations ll_dir_operations = {
1806         .llseek         = ll_dir_seek,
1807         .open           = ll_dir_open,
1808         .release        = ll_dir_release,
1809         .read           = generic_read_dir,
1810 #ifdef HAVE_DIR_CONTEXT
1811         .iterate        = ll_iterate,
1812 #else
1813         .readdir        = ll_readdir,
1814 #endif
1815         .unlocked_ioctl = ll_dir_ioctl,
1816         .fsync          = ll_fsync,
1817 };