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, 2012, 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 <asm/uaccess.h>
  46 #include <linux/buffer_head.h>   // for wait_on_buffer
  47 #include <linux/pagevec.h>
  48
  49 #define DEBUG_SUBSYSTEM S_LLITE
  50
  51 #include <lustre/lustre_idl.h>
  52 #include <obd_support.h>
  53 #include <obd_class.h>
  54 #include <lustre_lib.h>
  55 #include <lustre/lustre_idl.h>
  56 #include <lustre_lite.h>
  57 #include <lustre_dlm.h>
  58 #include <lustre_fid.h>
  59 #include "llite_internal.h"
  60
  61 /*
  62  * (new) readdir implementation overview.
  63  *
  64  * Original lustre readdir implementation cached exact copy of raw directory
  65  * pages on the client. These pages were indexed in client page cache by
  66  * logical offset in the directory file. This design, while very simple and
  67  * intuitive had some inherent problems:
  68  *
  69  *     . it implies that byte offset to the directory entry serves as a
  70  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  71  *     ext3/htree directory entries may move due to splits, and more
  72  *     importantly,
  73  *
  74  *     . it is incompatible with the design of split directories for cmd3,
  75  *     that assumes that names are distributed across nodes based on their
  76  *     hash, and so readdir should be done in hash order.
  77  *
  78  * New readdir implementation does readdir in hash order, and uses hash of a
  79  * file name as a telldir/seekdir cookie. This led to number of complications:
  80  *
  81  *     . hash is not unique, so it cannot be used to index cached directory
  82  *     pages on the client (note, that it requires a whole pageful of hash
  83  *     collided entries to cause two pages to have identical hashes);
  84  *
  85  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  86  *     entry cookie. ext3/htree has the same problem and lustre implementation
  87  *     mimics their solution: seekdir(hash) positions directory at the first
  88  *     entry with the given hash.
  89  *
  90  * Client side.
  91  *
  92  * 0. caching
  93  *
  94  * Client caches directory pages using hash of the first entry as an index. As
  95  * noted above hash is not unique, so this solution doesn't work as is:
  96  * special processing is needed for "page hash chains" (i.e., sequences of
  97  * pages filled with entries all having the same hash value).
  98  *
  99  * First, such chains have to be detected. To this end, server returns to the
 100  * client the hash of the first entry on the page next to one returned. When
 101  * client detects that this hash is the same as hash of the first entry on the
 102  * returned page, page hash collision has to be handled. Pages in the
 103  * hash chain, except first one, are termed "overflow pages".
 104  *
 105  * Solution to index uniqueness problem is to not cache overflow
 106  * pages. Instead, when page hash collision is detected, all overflow pages
 107  * from emerging chain are immediately requested from the server and placed in
 108  * a special data structure (struct ll_dir_chain). This data structure is used
 109  * by ll_readdir() to process entries from overflow pages. When readdir
 110  * invocation finishes, overflow pages are discarded. If page hash collision
 111  * chain weren't completely processed, next call to readdir will again detect
 112  * page hash collision, again read overflow pages in, process next portion of
 113  * entries and again discard the pages. This is not as wasteful as it looks,
 114  * because, given reasonable hash, page hash collisions are extremely rare.
 115  *
 116  * 1. directory positioning
 117  *
 118  * When seekdir(hash) is called, original
 119  *
 120  *
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  * Server.
 128  *
 129  * identification of and access to overflow pages
 130  *
 131  * page format
 132  *
 133  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 134  * a header lu_dirpage which describes the start/end hash, and whether this
 135  * page is empty (contains no dir entry) or hash collide with next page.
 136  * After client receives reply, several pages will be integrated into dir page
 137  * in CFS_PAGE_SIZE (if CFS_PAGE_SIZE greater than LU_PAGE_SIZE), and the
 138  * lu_dirpage for this integrated page will be adjusted.
 139  *
 140  */
 141
 142 /* returns the page unlocked, but with a reference */
 143 static int ll_dir_filler(void *_hash, struct page *page0)
 144 {
 145         struct inode *inode = page0->mapping->host;
 146         int hash64 = ll_i2sbi(inode)->ll_flags & LL_SBI_64BIT_HASH;
 147         struct obd_export *exp = ll_i2sbi(inode)->ll_md_exp;
 148         struct ptlrpc_request *request;
 149         struct mdt_body *body;
 150         struct md_op_data *op_data;
 151         __u64 hash = *((__u64 *)_hash);
 152         struct page **page_pool;
 153         struct page *page;
 154 #ifndef HAVE_ADD_TO_PAGE_CACHE_LRU
 155         struct pagevec lru_pvec;
 156 #endif
 157         struct lu_dirpage *dp;
 158         int max_pages = ll_i2sbi(inode)->ll_md_brw_size >> CFS_PAGE_SHIFT;
 159         int nrdpgs = 0; /* number of pages read actually */
 160         int npages;
 161         int i;
 162         int rc;
 163         ENTRY;
 164
 165         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash "LPU64"\n",
 166                inode->i_ino, inode->i_generation, inode, hash);
 167
 168         LASSERT(max_pages > 0 && max_pages <= MD_MAX_BRW_PAGES);
 169
 170         OBD_ALLOC(page_pool, sizeof(page) * max_pages);
 171         if (page_pool != NULL) {
 172                 page_pool[0] = page0;
 173         } else {
 174                 page_pool = &page0;
 175                 max_pages = 1;
 176         }
 177         for (npages = 1; npages < max_pages; npages++) {
 178                 page = page_cache_alloc_cold(inode->i_mapping);
 179                 if (!page)
 180                         break;
 181                 page_pool[npages] = page;
 182         }
 183
 184         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 185                                      LUSTRE_OPC_ANY, NULL);
 186         op_data->op_npages = npages;
 187         op_data->op_offset = hash;
 188         rc = md_readpage(exp, op_data, page_pool, &request);
 189         ll_finish_md_op_data(op_data);
 190         if (rc == 0) {
 191                 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 192                 /* Checked by mdc_readpage() */
 193                 LASSERT(body != NULL);
 194
 195                 if (body->valid & OBD_MD_FLSIZE)
 196                         cl_isize_write(inode, body->size);
 197
 198                 nrdpgs = (request->rq_bulk->bd_nob_transferred+CFS_PAGE_SIZE-1)
 199                          >> CFS_PAGE_SHIFT;
 200                 SetPageUptodate(page0);
 201         }
 202         unlock_page(page0);
 203         ptlrpc_req_finished(request);
 204
 205         CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
 206
 207         ll_pagevec_init(&lru_pvec, 0);
 208         for (i = 1; i < npages; i++) {
 209                 unsigned long offset;
 210                 int ret;
 211
 212                 page = page_pool[i];
 213
 214                 if (rc < 0 || i >= nrdpgs) {
 215                         page_cache_release(page);
 216                         continue;
 217                 }
 218
 219                 SetPageUptodate(page);
 220
 221                 dp = cfs_kmap(page);
 222                 hash = le64_to_cpu(dp->ldp_hash_start);
 223                 cfs_kunmap(page);
 224
 225                 offset = hash_x_index(hash, hash64);
 226
 227                 prefetchw(&page->flags);
 228                 ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
 229                                             GFP_KERNEL);
 230                 if (ret == 0) {
 231                         unlock_page(page);
 232                         if (ll_pagevec_add(&lru_pvec, page) == 0)
 233                                 ll_pagevec_lru_add_file(&lru_pvec);
 234                 } else {
 235                         CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
 236                                " %d\n", offset, ret);
 237                 }
 238                 page_cache_release(page);
 239         }
 240         ll_pagevec_lru_add_file(&lru_pvec);
 241
 242         if (page_pool != &page0)
 243                 OBD_FREE(page_pool, sizeof(struct page *) * max_pages);
 244         EXIT;
 245         return rc;
 246 }
 247
 248 static void ll_check_page(struct inode *dir, struct page *page)
 249 {
 250         /* XXX: check page format later */
 251         SetPageChecked(page);
 252 }
 253
 254 void ll_release_page(struct page *page, int remove)
 255 {
 256         kunmap(page);
 257         if (remove) {
 258                 lock_page(page);
 259                 if (likely(page->mapping != NULL))
 260                         truncate_complete_page(page->mapping, page);
 261                 unlock_page(page);
 262         }
 263         page_cache_release(page);
 264 }
 265
 266 /*
 267  * Find, kmap and return page that contains given hash.
 268  */
 269 static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
 270                                        __u64 *start, __u64 *end)
 271 {
 272         int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
 273         struct address_space *mapping = dir->i_mapping;
 274         /*
 275          * Complement of hash is used as an index so that
 276          * radix_tree_gang_lookup() can be used to find a page with starting
 277          * hash _smaller_ than one we are looking for.
 278          */
 279         unsigned long offset = hash_x_index(*hash, hash64);
 280         struct page *page;
 281         int found;
 282
 283         TREE_READ_LOCK_IRQ(mapping);
 284         found = radix_tree_gang_lookup(&mapping->page_tree,
 285                                        (void **)&page, offset, 1);
 286         if (found > 0) {
 287                 struct lu_dirpage *dp;
 288
 289                 page_cache_get(page);
 290                 TREE_READ_UNLOCK_IRQ(mapping);
 291                 /*
 292                  * In contrast to find_lock_page() we are sure that directory
 293                  * page cannot be truncated (while DLM lock is held) and,
 294                  * hence, can avoid restart.
 295                  *
 296                  * In fact, page cannot be locked here at all, because
 297                  * ll_dir_filler() does synchronous io.
 298                  */
 299                 wait_on_page(page);
 300                 if (PageUptodate(page)) {
 301                         dp = cfs_kmap(page);
 302                         if (BITS_PER_LONG == 32 && hash64) {
 303                                 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
 304                                 *end   = le64_to_cpu(dp->ldp_hash_end) >> 32;
 305                                 *hash  = *hash >> 32;
 306                         } else {
 307                                 *start = le64_to_cpu(dp->ldp_hash_start);
 308                                 *end   = le64_to_cpu(dp->ldp_hash_end);
 309                         }
 310                         LASSERTF(*start <= *hash, "start = "LPX64",end = "
 311                                  LPX64",hash = "LPX64"\n", *start, *end, *hash);
 312                         CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash "LPU64"\n",
 313                                offset, *start, *end, *hash);
 314                         if (*hash > *end) {
 315                                 ll_release_page(page, 0);
 316                                 page = NULL;
 317                         } else if (*end != *start && *hash == *end) {
 318                                 /*
 319                                  * upon hash collision, remove this page,
 320                                  * otherwise put page reference, and
 321                                  * ll_get_dir_page() will issue RPC to fetch
 322                                  * the page we want.
 323                                  */
 324                                 ll_release_page(page,
 325                                     le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
 326                                 page = NULL;
 327                         }
 328                 } else {
 329                         page_cache_release(page);
 330                         page = ERR_PTR(-EIO);
 331                 }
 332
 333         } else {
 334                 TREE_READ_UNLOCK_IRQ(mapping);
 335                 page = NULL;
 336         }
 337         return page;
 338 }
 339
 340 struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
 341                              struct ll_dir_chain *chain)
 342 {
 343         ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
 344         struct address_space *mapping = dir->i_mapping;
 345         struct lustre_handle lockh;
 346         struct lu_dirpage *dp;
 347         struct page *page;
 348         ldlm_mode_t mode;
 349         int rc;
 350         __u64 start = 0;
 351         __u64 end = 0;
 352         __u64 lhash = hash;
 353         struct ll_inode_info *lli = ll_i2info(dir);
 354         int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
 355
 356         mode = LCK_PR;
 357         rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
 358                            ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
 359         if (!rc) {
 360                 struct ldlm_enqueue_info einfo = {.ei_type = LDLM_IBITS,
 361                                                   .ei_mode = mode,
 362                                                   .ei_cb_bl =
 363                                                   ll_md_blocking_ast,
 364                                                   .ei_cb_cp =
 365                                                   ldlm_completion_ast,
 366                                                   .ei_cb_gl = NULL,
 367                                                   .ei_cb_wg = NULL,
 368                                                   .ei_cbdata = NULL};
 369                 struct lookup_intent it = { .it_op = IT_READDIR };
 370                 struct ptlrpc_request *request;
 371                 struct md_op_data *op_data;
 372
 373                 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
 374                 LUSTRE_OPC_ANY, NULL);
 375                 if (IS_ERR(op_data))
 376                         return (void *)op_data;
 377
 378                 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
 379                                 op_data, &lockh, NULL, 0, NULL, 0);
 380
 381                 ll_finish_md_op_data(op_data);
 382
 383                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 384                 if (request)
 385                         ptlrpc_req_finished(request);
 386                 if (rc < 0) {
 387                         CERROR("lock enqueue: "DFID" at "LPU64": rc %d\n",
 388                                 PFID(ll_inode2fid(dir)), hash, rc);
 389                         return ERR_PTR(rc);
 390                 }
 391
 392                 CDEBUG(D_INODE, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
 393                        dir, dir->i_ino, dir->i_generation);
 394                 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp,
 395                                  &it.d.lustre.it_lock_handle, dir, NULL);
 396         } else {
 397                 /* for cross-ref object, l_ast_data of the lock may not be set,
 398                  * we reset it here */
 399                 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
 400                                  dir, NULL);
 401         }
 402         ldlm_lock_dump_handle(D_OTHER, &lockh);
 403
 404         mutex_lock(&lli->lli_readdir_mutex);
 405         page = ll_dir_page_locate(dir, &lhash, &start, &end);
 406         if (IS_ERR(page)) {
 407                 CERROR("dir page locate: "DFID" at "LPU64": rc %ld\n",
 408                        PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
 409                 GOTO(out_unlock, page);
 410         } else if (page != NULL) {
 411                 /*
 412                  * XXX nikita: not entirely correct handling of a corner case:
 413                  * suppose hash chain of entries with hash value HASH crosses
 414                  * border between pages P0 and P1. First both P0 and P1 are
 415                  * cached, seekdir() is called for some entry from the P0 part
 416                  * of the chain. Later P0 goes out of cache. telldir(HASH)
 417                  * happens and finds P1, as it starts with matching hash
 418                  * value. Remaining entries from P0 part of the chain are
 419                  * skipped. (Is that really a bug?)
 420                  *
 421                  * Possible solutions: 0. don't cache P1 is such case, handle
 422                  * it as an "overflow" page. 1. invalidate all pages at
 423                  * once. 2. use HASH|1 as an index for P1.
 424                  */
 425                 GOTO(hash_collision, page);
 426         }
 427
 428         page = read_cache_page(mapping, hash_x_index(hash, hash64),
 429                                ll_dir_filler, &lhash);
 430         if (IS_ERR(page)) {
 431                 CERROR("read cache page: "DFID" at "LPU64": rc %ld\n",
 432                        PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
 433                 GOTO(out_unlock, page);
 434         }
 435
 436         wait_on_page(page);
 437         (void)kmap(page);
 438         if (!PageUptodate(page)) {
 439                 CERROR("page not updated: "DFID" at "LPU64": rc %d\n",
 440                        PFID(ll_inode2fid(dir)), hash, -5);
 441                 goto fail;
 442         }
 443         if (!PageChecked(page))
 444                 ll_check_page(dir, page);
 445         if (PageError(page)) {
 446                 CERROR("page error: "DFID" at "LPU64": rc %d\n",
 447                        PFID(ll_inode2fid(dir)), hash, -5);
 448                 goto fail;
 449         }
 450 hash_collision:
 451         dp = page_address(page);
 452         if (BITS_PER_LONG == 32 && hash64) {
 453                 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
 454                 end   = le64_to_cpu(dp->ldp_hash_end) >> 32;
 455                 lhash = hash >> 32;
 456         } else {
 457                 start = le64_to_cpu(dp->ldp_hash_start);
 458                 end   = le64_to_cpu(dp->ldp_hash_end);
 459                 lhash = hash;
 460         }
 461         if (end == start) {
 462                 LASSERT(start == lhash);
 463                 CWARN("Page-wide hash collision: "LPU64"\n", end);
 464                 if (BITS_PER_LONG == 32 && hash64)
 465                         CWARN("Real page-wide hash collision at ["LPU64" "LPU64
 466                               "] with hash "LPU64"\n",
 467                               le64_to_cpu(dp->ldp_hash_start),
 468                               le64_to_cpu(dp->ldp_hash_end), hash);
 469                 /*
 470                  * Fetch whole overflow chain...
 471                  *
 472                  * XXX not yet.
 473                  */
 474                 goto fail;
 475         }
 476 out_unlock:
 477         mutex_unlock(&lli->lli_readdir_mutex);
 478         ldlm_lock_decref(&lockh, mode);
 479         return page;
 480
 481 fail:
 482         ll_release_page(page, 1);
 483         page = ERR_PTR(-EIO);
 484         goto out_unlock;
 485 }
 486
 487 int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
 488                 filldir_t filldir)
 489 {
 490         struct ll_inode_info *info       = ll_i2info(inode);
 491         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 492         __u64                 pos        = *_pos;
 493         int                   api32      = ll_need_32bit_api(sbi);
 494         int                   hash64     = sbi->ll_flags & LL_SBI_64BIT_HASH;
 495         struct page          *page;
 496         struct ll_dir_chain   chain;
 497         int                   done = 0;
 498         int                   rc = 0;
 499         ENTRY;
 500
 501         ll_dir_chain_init(&chain);
 502
 503         page = ll_get_dir_page(inode, pos, &chain);
 504
 505         while (rc == 0 && !done) {
 506                 struct lu_dirpage *dp;
 507                 struct lu_dirent  *ent;
 508
 509                 if (!IS_ERR(page)) {
 510                         /*
 511                          * If page is empty (end of directory is reached),
 512                          * use this value.
 513                          */
 514                         __u64 hash = MDS_DIR_END_OFF;
 515                         __u64 next;
 516
 517                         dp = page_address(page);
 518                         for (ent = lu_dirent_start(dp); ent != NULL && !done;
 519                              ent = lu_dirent_next(ent)) {
 520                                 __u16          type;
 521                                 int            namelen;
 522                                 struct lu_fid  fid;
 523                                 __u64          lhash;
 524                                 __u64          ino;
 525
 526                                 /*
 527                                  * XXX: implement correct swabbing here.
 528                                  */
 529
 530                                 hash = le64_to_cpu(ent->lde_hash);
 531                                 if (hash < pos)
 532                                         /*
 533                                          * Skip until we find target hash
 534                                          * value.
 535                                          */
 536                                         continue;
 537
 538                                 namelen = le16_to_cpu(ent->lde_namelen);
 539                                 if (namelen == 0)
 540                                         /*
 541                                          * Skip dummy record.
 542                                          */
 543                                         continue;
 544
 545                                 if (api32 && hash64)
 546                                         lhash = hash >> 32;
 547                                 else
 548                                         lhash = hash;
 549                                 fid_le_to_cpu(&fid, &ent->lde_fid);
 550                                 ino = cl_fid_build_ino(&fid, api32);
 551                                 type = ll_dirent_type_get(ent);
 552                                 /* For 'll_nfs_get_name_filldir()', it will try
 553                                  * to access the 'ent' through its 'lde_name',
 554                                  * so the parameter 'name' for 'filldir()' must
 555                                  * be part of the 'ent'. */
 556                                 done = filldir(cookie, ent->lde_name, namelen,
 557                                                lhash, ino, type);
 558                         }
 559                         next = le64_to_cpu(dp->ldp_hash_end);
 560                         if (!done) {
 561                                 pos = next;
 562                                 if (pos == MDS_DIR_END_OFF) {
 563                                         /*
 564                                          * End of directory reached.
 565                                          */
 566                                         done = 1;
 567                                         ll_release_page(page, 0);
 568                                 } else if (1 /* chain is exhausted*/) {
 569                                         /*
 570                                          * Normal case: continue to the next
 571                                          * page.
 572                                          */
 573                                         ll_release_page(page,
 574                                             le32_to_cpu(dp->ldp_flags) &
 575                                                         LDF_COLLIDE);
 576                                         next = pos;
 577                                         page = ll_get_dir_page(inode, pos,
 578                                                                &chain);
 579                                 } else {
 580                                         /*
 581                                          * go into overflow page.
 582                                          */
 583                                         LASSERT(le32_to_cpu(dp->ldp_flags) &
 584                                                 LDF_COLLIDE);
 585                                         ll_release_page(page, 1);
 586                                 }
 587                         } else {
 588                                 pos = hash;
 589                                 ll_release_page(page, 0);
 590                         }
 591                 } else {
 592                         rc = PTR_ERR(page);
 593                         CERROR("error reading dir "DFID" at %lu: rc %d\n",
 594                                PFID(&info->lli_fid), (unsigned long)pos, rc);
 595                 }
 596         }
 597
 598         *_pos = pos;
 599         ll_dir_chain_fini(&chain);
 600         RETURN(rc);
 601 }
 602
 603 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 604 {
 605         struct inode            *inode  = filp->f_dentry->d_inode;
 606         struct ll_file_data     *lfd    = LUSTRE_FPRIVATE(filp);
 607         struct ll_sb_info       *sbi    = ll_i2sbi(inode);
 608         __u64                   pos     = lfd->lfd_pos;
 609         int                     hash64  = sbi->ll_flags & LL_SBI_64BIT_HASH;
 610         int                     api32   = ll_need_32bit_api(sbi);
 611         int                     rc;
 612 #ifdef HAVE_TOUCH_ATIME_1ARG
 613         struct path             path;
 614 #endif
 615         ENTRY;
 616
 617         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu "
 618                " 32bit_api %d\n", inode->i_ino, inode->i_generation,
 619                inode, (unsigned long)pos, i_size_read(inode), api32);
 620
 621         if (pos == MDS_DIR_END_OFF)
 622                 /*
 623                  * end-of-file.
 624                  */
 625                 GOTO(out, rc = 0);
 626
 627         rc = ll_dir_read(inode, &pos, cookie, filldir);
 628         lfd->lfd_pos = pos;
 629         if (pos == MDS_DIR_END_OFF) {
 630                 if (api32)
 631                         filp->f_pos = LL_DIR_END_OFF_32BIT;
 632                 else
 633                         filp->f_pos = LL_DIR_END_OFF;
 634         } else {
 635                 if (api32 && hash64)
 636                         filp->f_pos = pos >> 32;
 637                 else
 638                         filp->f_pos = pos;
 639         }
 640         filp->f_version = inode->i_version;
 641 #ifdef HAVE_TOUCH_ATIME_1ARG
 642         path.mnt = filp->f_vfsmnt;
 643         path.dentry = filp->f_dentry;
 644         touch_atime(&path);
 645 #else
 646         touch_atime(filp->f_vfsmnt, filp->f_dentry);
 647 #endif
 648
 649 out:
 650         if (!rc)
 651                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 652
 653         RETURN(rc);
 654 }
 655
 656 int ll_send_mgc_param(struct obd_export *mgc, char *string)
 657 {
 658         struct mgs_send_param *msp;
 659         int rc = 0;
 660
 661         OBD_ALLOC_PTR(msp);
 662         if (!msp)
 663                 return -ENOMEM;
 664
 665         strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
 666         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 667                                 sizeof(struct mgs_send_param), msp, NULL);
 668         if (rc)
 669                 CERROR("Failed to set parameter: %d\n", rc);
 670         OBD_FREE_PTR(msp);
 671
 672         return rc;
 673 }
 674
 675 int ll_dir_setdirstripe(struct inode *dir, struct lmv_user_md *lump,
 676                         char *filename)
 677 {
 678         struct ptlrpc_request *request = NULL;
 679         struct md_op_data *op_data;
 680         struct ll_sb_info *sbi = ll_i2sbi(dir);
 681         int mode;
 682         int err;
 683
 684         ENTRY;
 685
 686         mode = (0755 & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 687         op_data = ll_prep_md_op_data(NULL, dir, NULL, filename,
 688                                      strlen(filename), mode, LUSTRE_OPC_MKDIR,
 689                                      lump);
 690         if (IS_ERR(op_data))
 691                 GOTO(err_exit, err = PTR_ERR(op_data));
 692
 693         op_data->op_cli_flags |= CLI_SET_MEA;
 694         err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
 695                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
 696                         cfs_curproc_cap_pack(), 0, &request);
 697         ll_finish_md_op_data(op_data);
 698         if (err)
 699                 GOTO(err_exit, err);
 700 err_exit:
 701         ptlrpc_req_finished(request);
 702         return err;
 703 }
 704
 705 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 706                      int set_default)
 707 {
 708         struct ll_sb_info *sbi = ll_i2sbi(inode);
 709         struct md_op_data *op_data;
 710         struct ptlrpc_request *req = NULL;
 711         int rc = 0;
 712         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 713         struct obd_device *mgc = lsi->lsi_mgc;
 714         int lum_size;
 715         ENTRY;
 716
 717         if (lump != NULL) {
 718                 /*
 719                  * This is coming from userspace, so should be in
 720                  * local endian.  But the MDS would like it in little
 721                  * endian, so we swab it before we send it.
 722                  */
 723                 switch (lump->lmm_magic) {
 724                 case LOV_USER_MAGIC_V1: {
 725                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 726                                 lustre_swab_lov_user_md_v1(lump);
 727                         lum_size = sizeof(struct lov_user_md_v1);
 728                         break;
 729                 }
 730                 case LOV_USER_MAGIC_V3: {
 731                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 732                                 lustre_swab_lov_user_md_v3(
 733                                         (struct lov_user_md_v3 *)lump);
 734                         lum_size = sizeof(struct lov_user_md_v3);
 735                         break;
 736                 }
 737                 default: {
 738                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 739                                         " %#08x != %#08x nor %#08x\n",
 740                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 741                                         LOV_USER_MAGIC_V3);
 742                         RETURN(-EINVAL);
 743                 }
 744                 }
 745         } else {
 746                 lum_size = sizeof(struct lov_user_md_v1);
 747         }
 748
 749         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 750                                      LUSTRE_OPC_ANY, NULL);
 751         if (IS_ERR(op_data))
 752                 RETURN(PTR_ERR(op_data));
 753
 754         if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
 755                 op_data->op_cli_flags |= CLI_SET_MEA;
 756
 757         /* swabbing is done in lov_setstripe() on server side */
 758         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
 759                         NULL, 0, &req, NULL);
 760         ll_finish_md_op_data(op_data);
 761         ptlrpc_req_finished(req);
 762         if (rc) {
 763                 if (rc != -EPERM && rc != -EACCES)
 764                         CERROR("mdc_setattr fails: rc = %d\n", rc);
 765         }
 766
 767         /* In the following we use the fact that LOV_USER_MAGIC_V1 and
 768          LOV_USER_MAGIC_V3 have the same initial fields so we do not
 769          need the make the distiction between the 2 versions */
 770         if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
 771                 char *param = NULL;
 772                 char *buf;
 773
 774                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 775                 if (param == NULL)
 776                         GOTO(end, rc = -ENOMEM);
 777
 778                 buf = param;
 779                 /* Get fsname and assume devname to be -MDT0000. */
 780                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 781                 strcat(buf, "-MDT0000.lov");
 782                 buf += strlen(buf);
 783
 784                 /* Set root stripesize */
 785                 sprintf(buf, ".stripesize=%u",
 786                         lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 787                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 788                 if (rc)
 789                         GOTO(end, rc);
 790
 791                 /* Set root stripecount */
 792                 sprintf(buf, ".stripecount=%hd",
 793                         lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 794                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 795                 if (rc)
 796                         GOTO(end, rc);
 797
 798                 /* Set root stripeoffset */
 799                 sprintf(buf, ".stripeoffset=%hd",
 800                         lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 801                         (typeof(lump->lmm_stripe_offset))(-1));
 802                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 803
 804 end:
 805                 if (param != NULL)
 806                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 807         }
 808         RETURN(rc);
 809 }
 810
 811 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 812                      int *lmm_size, struct ptlrpc_request **request)
 813 {
 814         struct ll_sb_info *sbi = ll_i2sbi(inode);
 815         struct mdt_body   *body;
 816         struct lov_mds_md *lmm = NULL;
 817         struct ptlrpc_request *req = NULL;
 818         int rc, lmmsize;
 819         struct md_op_data *op_data;
 820
 821         rc = ll_get_max_mdsize(sbi, &lmmsize);
 822         if (rc)
 823                 RETURN(rc);
 824
 825         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 826                                      0, lmmsize, LUSTRE_OPC_ANY,
 827                                      NULL);
 828         if (IS_ERR(op_data))
 829                 RETURN(PTR_ERR(op_data));
 830
 831         op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 832         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 833         ll_finish_md_op_data(op_data);
 834         if (rc < 0) {
 835                 CDEBUG(D_INFO, "md_getattr failed on inode "
 836                        "%lu/%u: rc %d\n", inode->i_ino,
 837                        inode->i_generation, rc);
 838                 GOTO(out, rc);
 839         }
 840
 841         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 842         LASSERT(body != NULL);
 843
 844         lmmsize = body->eadatasize;
 845
 846         if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 847             lmmsize == 0) {
 848                 GOTO(out, rc = -ENODATA);
 849         }
 850
 851         lmm = req_capsule_server_sized_get(&req->rq_pill,
 852                                            &RMF_MDT_MD, lmmsize);
 853         LASSERT(lmm != NULL);
 854
 855         /*
 856          * This is coming from the MDS, so is probably in
 857          * little endian.  We convert it to host endian before
 858          * passing it to userspace.
 859          */
 860         /* We don't swab objects for directories */
 861         switch (le32_to_cpu(lmm->lmm_magic)) {
 862         case LOV_MAGIC_V1:
 863                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 864                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 865                 break;
 866         case LOV_MAGIC_V3:
 867                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 868                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 869                 break;
 870         default:
 871                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 872                 rc = -EPROTO;
 873         }
 874 out:
 875         *lmmp = lmm;
 876         *lmm_size = lmmsize;
 877         *request = req;
 878         return rc;
 879 }
 880
 881 /*
 882  *  Get MDT index for the inode.
 883  */
 884 int ll_get_mdt_idx(struct inode *inode)
 885 {
 886         struct ll_sb_info *sbi = ll_i2sbi(inode);
 887         struct md_op_data *op_data;
 888         int rc, mdtidx;
 889         ENTRY;
 890
 891         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
 892                                      0, LUSTRE_OPC_ANY, NULL);
 893         if (IS_ERR(op_data))
 894                 RETURN(PTR_ERR(op_data));
 895
 896         op_data->op_flags |= MF_GET_MDT_IDX;
 897         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 898         mdtidx = op_data->op_mds;
 899         ll_finish_md_op_data(op_data);
 900         if (rc < 0) {
 901                 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 902                 RETURN(rc);
 903         }
 904         return mdtidx;
 905 }
 906
 907 /**
 908  * Generic handler to do any pre-copy work.
 909  *
 910  * It send a first hsm_progress (with extent length == 0) to coordinator as a
 911  * first information for it that real work has started.
 912  *
 913  * Moreover, for a ARCHIVE request, it will sample the file data version and
 914  * store it in \a copy.
 915  *
 916  * \return 0 on success.
 917  */
 918 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 919 {
 920         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 921         struct hsm_progress_kernel       hpk;
 922         int                              rc;
 923         ENTRY;
 924
 925         /* Forge a hsm_progress based on data from copy. */
 926         hpk.hpk_fid = copy->hc_hai.hai_fid;
 927         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 928         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 929         hpk.hpk_extent.length = 0;
 930         hpk.hpk_flags = 0;
 931         hpk.hpk_errval = 0;
 932         hpk.hpk_data_version = 0;
 933
 934
 935         /* For archive request, we need to read the current file version. */
 936         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 937                 struct inode    *inode;
 938                 __u64            data_version = 0;
 939
 940                 /* Get inode for this fid */
 941                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 942                 if (IS_ERR(inode)) {
 943                         hpk.hpk_flags |= HP_FLAG_RETRY;
 944                         /* hpk_errval is >= 0 */
 945                         hpk.hpk_errval = -PTR_ERR(inode);
 946                         GOTO(progress, rc = PTR_ERR(inode));
 947                 }
 948
 949                 /* Read current file data version */
 950                 rc = ll_data_version(inode, &data_version, 1);
 951                 iput(inode);
 952                 if (rc != 0) {
 953                         CDEBUG(D_HSM, "Could not read file data version of "
 954                                       DFID" (rc = %d). Archive request ("
 955                                       LPX64") could not be done.\n",
 956                                       PFID(&copy->hc_hai.hai_fid), rc,
 957                                       copy->hc_hai.hai_cookie);
 958                         hpk.hpk_flags |= HP_FLAG_RETRY;
 959                         /* hpk_errval must be >= 0 */
 960                         hpk.hpk_errval = -rc;
 961                         GOTO(progress, rc);
 962                 }
 963
 964                 /* Store it the hsm_copy for later copytool use.
 965                  * Always modified even if no lsm. */
 966                 copy->hc_data_version = data_version;
 967         }
 968
 969 progress:
 970         rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 971                            &hpk, NULL);
 972
 973         RETURN(rc);
 974 }
 975
 976 /**
 977  * Generic handler to do any post-copy work.
 978  *
 979  * It will send the last hsm_progress update to coordinator to inform it
 980  * that copy is finished and whether it was successful or not.
 981  *
 982  * Moreover,
 983  * - for ARCHIVE request, it will sample the file data version and compare it
 984  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 985  *   will be considered as failed.
 986  * - for RESTORE request, it will sample the file data version and send it to
 987  *   coordinator which is useful if the file was imported as 'released'.
 988  *
 989  * \return 0 on success.
 990  */
 991 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 992 {
 993         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 994         struct hsm_progress_kernel       hpk;
 995         int                              rc;
 996         ENTRY;
 997
 998         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 999         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
1000          * initialized if copy_end was called with copy == NULL.
1001          */
1002
1003         /* Forge a hsm_progress based on data from copy. */
1004         hpk.hpk_fid = copy->hc_hai.hai_fid;
1005         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
1006         hpk.hpk_extent = copy->hc_hai.hai_extent;
1007         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
1008         hpk.hpk_errval = copy->hc_errval;
1009         hpk.hpk_data_version = 0;
1010
1011         /* For archive request, we need to check the file data was not changed.
1012          *
1013          * For restore request, we need to send the file data version, this is
1014          * useful when the file was created using hsm_import.
1015          */
1016         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
1017              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
1018             (copy->hc_errval == 0)) {
1019                 struct inode    *inode;
1020                 __u64            data_version = 0;
1021
1022                 /* Get lsm for this fid */
1023                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
1024                 if (IS_ERR(inode)) {
1025                         hpk.hpk_flags |= HP_FLAG_RETRY;
1026                         /* hpk_errval must be >= 0 */
1027                         hpk.hpk_errval = -PTR_ERR(inode);
1028                         GOTO(progress, rc = PTR_ERR(inode));
1029                 }
1030
1031                 rc = ll_data_version(inode, &data_version,
1032                                      copy->hc_hai.hai_action == HSMA_ARCHIVE);
1033                 iput(inode);
1034                 if (rc) {
1035                         CDEBUG(D_HSM, "Could not read file data version. "
1036                                       "Request could not be confirmed.\n");
1037                         if (hpk.hpk_errval == 0)
1038                                 hpk.hpk_errval = -rc;
1039                         GOTO(progress, rc);
1040                 }
1041
1042                 /* Store it the hsm_copy for later copytool use.
1043                  * Always modified even if no lsm. */
1044                 hpk.hpk_data_version = data_version;
1045
1046                 /* File could have been stripped during archiving, so we need
1047                  * to check anyway. */
1048                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
1049                     (copy->hc_data_version != data_version)) {
1050                         CDEBUG(D_HSM, "File data version mismatched. "
1051                               "File content was changed during archiving. "
1052                                DFID", start:"LPX64" current:"LPX64"\n",
1053                                PFID(&copy->hc_hai.hai_fid),
1054                                copy->hc_data_version, data_version);
1055                         /* File was changed, send error to cdt. Do not ask for
1056                          * retry because if a file is modified frequently,
1057                          * the cdt will loop on retried archive requests.
1058                          * The policy engine will ask for a new archive later
1059                          * when the file will not be modified for some tunable
1060                          * time */
1061                         /* we do not notify caller */
1062                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
1063                         /* hpk_errval must be >= 0 */
1064                         hpk.hpk_errval = EBUSY;
1065                 }
1066
1067         }
1068
1069 progress:
1070         rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1071                            &hpk, NULL);
1072
1073         RETURN(rc);
1074 }
1075
1076
1077 static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
1078 {
1079         void *ptr;
1080         int rc;
1081
1082         OBD_ALLOC(ptr, len);
1083         if (ptr == NULL)
1084                 return -ENOMEM;
1085         if (cfs_copy_from_user(ptr, data, len)) {
1086                 OBD_FREE(ptr, len);
1087                 return -EFAULT;
1088         }
1089         rc = obd_iocontrol(cmd, exp, len, data, NULL);
1090         OBD_FREE(ptr, len);
1091         return rc;
1092 }
1093
1094 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1095 {
1096         int cmd = qctl->qc_cmd;
1097         int type = qctl->qc_type;
1098         int id = qctl->qc_id;
1099         int valid = qctl->qc_valid;
1100         int rc = 0;
1101         ENTRY;
1102
1103         switch (cmd) {
1104         case LUSTRE_Q_INVALIDATE:
1105         case LUSTRE_Q_FINVALIDATE:
1106         case Q_QUOTAON:
1107         case Q_QUOTAOFF:
1108         case Q_SETQUOTA:
1109         case Q_SETINFO:
1110                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1111                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1112                         RETURN(-EPERM);
1113                 break;
1114         case Q_GETQUOTA:
1115                 if (((type == USRQUOTA && cfs_curproc_euid() != id) ||
1116                      (type == GRPQUOTA && !in_egroup_p(id))) &&
1117                     (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1118                      sbi->ll_flags & LL_SBI_RMT_CLIENT))
1119                         RETURN(-EPERM);
1120                 break;
1121         case Q_GETINFO:
1122                 break;
1123         default:
1124                 CERROR("unsupported quotactl op: %#x\n", cmd);
1125                 RETURN(-ENOTTY);
1126         }
1127
1128         if (valid != QC_GENERAL) {
1129                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
1130                         RETURN(-EOPNOTSUPP);
1131
1132                 if (cmd == Q_GETINFO)
1133                         qctl->qc_cmd = Q_GETOINFO;
1134                 else if (cmd == Q_GETQUOTA)
1135                         qctl->qc_cmd = Q_GETOQUOTA;
1136                 else
1137                         RETURN(-EINVAL);
1138
1139                 switch (valid) {
1140                 case QC_MDTIDX:
1141                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1142                                            sizeof(*qctl), qctl, NULL);
1143                         break;
1144                 case QC_OSTIDX:
1145                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1146                                            sizeof(*qctl), qctl, NULL);
1147                         break;
1148                 case QC_UUID:
1149                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1150                                            sizeof(*qctl), qctl, NULL);
1151                         if (rc == -EAGAIN)
1152                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1153                                                    sbi->ll_dt_exp,
1154                                                    sizeof(*qctl), qctl, NULL);
1155                         break;
1156                 default:
1157                         rc = -EINVAL;
1158                         break;
1159                 }
1160
1161                 if (rc)
1162                         RETURN(rc);
1163
1164                 qctl->qc_cmd = cmd;
1165         } else {
1166                 struct obd_quotactl *oqctl;
1167
1168                 OBD_ALLOC_PTR(oqctl);
1169                 if (oqctl == NULL)
1170                         RETURN(-ENOMEM);
1171
1172                 QCTL_COPY(oqctl, qctl);
1173                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1174                 if (rc) {
1175                         if (rc != -EALREADY && cmd == Q_QUOTAON) {
1176                                 oqctl->qc_cmd = Q_QUOTAOFF;
1177                                 obd_quotactl(sbi->ll_md_exp, oqctl);
1178                         }
1179                         OBD_FREE_PTR(oqctl);
1180                         RETURN(rc);
1181                 }
1182                 /* If QIF_SPACE is not set, client should collect the
1183                  * space usage from OSSs by itself */
1184                 if (cmd == Q_GETQUOTA &&
1185                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1186                     !oqctl->qc_dqblk.dqb_curspace) {
1187                         struct obd_quotactl *oqctl_tmp;
1188
1189                         OBD_ALLOC_PTR(oqctl_tmp);
1190                         if (oqctl_tmp == NULL)
1191                                 GOTO(out, rc = -ENOMEM);
1192
1193                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1194                         oqctl_tmp->qc_id = oqctl->qc_id;
1195                         oqctl_tmp->qc_type = oqctl->qc_type;
1196
1197                         /* collect space usage from OSTs */
1198                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1199                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1200                         if (!rc || rc == -EREMOTEIO) {
1201                                 oqctl->qc_dqblk.dqb_curspace =
1202                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1203                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1204                         }
1205
1206                         /* collect space & inode usage from MDTs */
1207                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1208                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1209                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1210                         if (!rc || rc == -EREMOTEIO) {
1211                                 oqctl->qc_dqblk.dqb_curspace +=
1212                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1213                                 oqctl->qc_dqblk.dqb_curinodes =
1214                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1215                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1216                         } else {
1217                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1218                         }
1219
1220                         OBD_FREE_PTR(oqctl_tmp);
1221                 }
1222 out:
1223                 QCTL_COPY(qctl, oqctl);
1224                 OBD_FREE_PTR(oqctl);
1225         }
1226
1227         RETURN(rc);
1228 }
1229
1230 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1231 {
1232         struct inode *inode = file->f_dentry->d_inode;
1233         struct ll_sb_info *sbi = ll_i2sbi(inode);
1234         struct obd_ioctl_data *data;
1235         int rc = 0;
1236         ENTRY;
1237
1238         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
1239                inode->i_ino, inode->i_generation, inode, cmd);
1240
1241         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1242         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1243                 return -ENOTTY;
1244
1245         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1246         switch(cmd) {
1247         case FSFILT_IOC_GETFLAGS:
1248         case FSFILT_IOC_SETFLAGS:
1249                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1250         case FSFILT_IOC_GETVERSION_OLD:
1251         case FSFILT_IOC_GETVERSION:
1252                 RETURN(put_user(inode->i_generation, (int *)arg));
1253         /* We need to special case any other ioctls we want to handle,
1254          * to send them to the MDS/OST as appropriate and to properly
1255          * network encode the arg field.
1256         case FSFILT_IOC_SETVERSION_OLD:
1257         case FSFILT_IOC_SETVERSION:
1258         */
1259         case LL_IOC_GET_MDTIDX: {
1260                 int mdtidx;
1261
1262                 mdtidx = ll_get_mdt_idx(inode);
1263                 if (mdtidx < 0)
1264                         RETURN(mdtidx);
1265
1266                 if (put_user((int)mdtidx, (int*)arg))
1267                         RETURN(-EFAULT);
1268
1269                 return 0;
1270         }
1271         case IOC_MDC_LOOKUP: {
1272                 struct ptlrpc_request *request = NULL;
1273                 int namelen, len = 0;
1274                 char *buf = NULL;
1275                 char *filename;
1276                 struct md_op_data *op_data;
1277
1278                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1279                 if (rc)
1280                         RETURN(rc);
1281                 data = (void *)buf;
1282
1283                 filename = data->ioc_inlbuf1;
1284                 namelen = strlen(filename);
1285
1286                 if (namelen < 1) {
1287                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1288                         GOTO(out_free, rc = -EINVAL);
1289                 }
1290
1291                 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
1292                                              0, LUSTRE_OPC_ANY, NULL);
1293                 if (IS_ERR(op_data))
1294                         GOTO(out_free, rc = PTR_ERR(op_data));
1295
1296                 op_data->op_valid = OBD_MD_FLID;
1297                 rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
1298                 ll_finish_md_op_data(op_data);
1299                 if (rc < 0) {
1300                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
1301                         GOTO(out_free, rc);
1302                 }
1303                 ptlrpc_req_finished(request);
1304                 EXIT;
1305 out_free:
1306                 obd_ioctl_freedata(buf, len);
1307                 return rc;
1308         }
1309         case LL_IOC_LMV_SETSTRIPE: {
1310                 struct lmv_user_md  *lum;
1311                 char            *buf = NULL;
1312                 char            *filename;
1313                 int              namelen = 0;
1314                 int              lumlen = 0;
1315                 int              len;
1316                 int              rc;
1317
1318                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1319                 if (rc)
1320                         RETURN(rc);
1321
1322                 data = (void *)buf;
1323                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1324                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1325                         GOTO(lmv_out_free, rc = -EINVAL);
1326
1327                 filename = data->ioc_inlbuf1;
1328                 namelen = data->ioc_inllen1;
1329
1330                 if (namelen < 1) {
1331                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1332                         GOTO(lmv_out_free, rc = -EINVAL);
1333                 }
1334                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1335                 lumlen = data->ioc_inllen2;
1336
1337                 if (lum->lum_magic != LMV_USER_MAGIC ||
1338                     lumlen != sizeof(*lum)) {
1339                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1340                                filename, lum->lum_magic, lumlen, -EFAULT);
1341                         GOTO(lmv_out_free, rc = -EINVAL);
1342                 }
1343
1344                 /**
1345                  * ll_dir_setdirstripe will be used to set dir stripe
1346                  *  mdc_create--->mdt_reint_create (with dirstripe)
1347                  */
1348                 rc = ll_dir_setdirstripe(inode, lum, filename);
1349 lmv_out_free:
1350                 obd_ioctl_freedata(buf, len);
1351                 RETURN(rc);
1352
1353         }
1354         case LL_IOC_LOV_SETSTRIPE: {
1355                 struct lov_user_md_v3 lumv3;
1356                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1357                 struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
1358                 struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
1359
1360                 int set_default = 0;
1361
1362                 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1363                 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1364                         sizeof(lumv3p->lmm_objects[0]));
1365                 /* first try with v1 which is smaller than v3 */
1366                 if (cfs_copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1367                         RETURN(-EFAULT);
1368
1369                 if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
1370                         if (cfs_copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1371                                 RETURN(-EFAULT);
1372                 }
1373
1374                 if (inode->i_sb->s_root == file->f_dentry)
1375                         set_default = 1;
1376
1377                 /* in v1 and v3 cases lumv1 points to data */
1378                 rc = ll_dir_setstripe(inode, lumv1, set_default);
1379
1380                 RETURN(rc);
1381         }
1382         case LL_IOC_LMV_GETSTRIPE: {
1383                 struct lmv_user_md *lump = (struct lmv_user_md *)arg;
1384                 struct lmv_user_md lum;
1385                 struct lmv_user_md *tmp;
1386                 int lum_size;
1387                 int rc = 0;
1388                 int mdtindex;
1389
1390                 if (copy_from_user(&lum, lump, sizeof(struct lmv_user_md)))
1391                         RETURN(-EFAULT);
1392
1393                 if (lum.lum_magic != LMV_MAGIC_V1)
1394                         RETURN(-EINVAL);
1395
1396                 lum_size = lmv_user_md_size(1, LMV_MAGIC_V1);
1397                 OBD_ALLOC(tmp, lum_size);
1398                 if (tmp == NULL)
1399                         GOTO(free_lmv, rc = -ENOMEM);
1400
1401                 memcpy(tmp, &lum, sizeof(lum));
1402                 tmp->lum_type = LMV_STRIPE_TYPE;
1403                 tmp->lum_stripe_count = 1;
1404                 mdtindex = ll_get_mdt_idx(inode);
1405                 if (mdtindex < 0)
1406                         GOTO(free_lmv, rc = -ENOMEM);
1407
1408                 tmp->lum_stripe_offset = mdtindex;
1409                 tmp->lum_objects[0].lum_mds = mdtindex;
1410                 memcpy(&tmp->lum_objects[0].lum_fid, ll_inode2fid(inode),
1411                        sizeof(struct lu_fid));
1412                 if (copy_to_user((void *)arg, tmp, lum_size))
1413                         GOTO(free_lmv, rc = -EFAULT);
1414 free_lmv:
1415                 if (tmp)
1416                         OBD_FREE(tmp, lum_size);
1417                 RETURN(rc);
1418         }
1419         case LL_IOC_REMOVE_ENTRY: {
1420                 char            *filename = NULL;
1421                 int              namelen = 0;
1422                 int              rc;
1423
1424                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1425                  * unsupported server, which might crash the server(LU-2730),
1426                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1427                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1428                  * server will support REINT_RMENTRY XXX*/
1429                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1430                         return -ENOTSUPP;
1431
1432                 filename = getname((const char *)arg);
1433                 if (IS_ERR(filename))
1434                         RETURN(PTR_ERR(filename));
1435
1436                 namelen = strlen(filename);
1437                 if (namelen < 1)
1438                         GOTO(out_rmdir, rc = -EINVAL);
1439
1440                 rc = ll_rmdir_entry(inode, filename, namelen);
1441 out_rmdir:
1442                 if (filename)
1443                         putname(filename);
1444                 RETURN(rc);
1445         }
1446         case LL_IOC_LOV_SWAP_LAYOUTS:
1447                 RETURN(-EPERM);
1448         case LL_IOC_OBD_STATFS:
1449                 RETURN(ll_obd_statfs(inode, (void *)arg));
1450         case LL_IOC_LOV_GETSTRIPE:
1451         case LL_IOC_MDC_GETINFO:
1452         case IOC_MDC_GETFILEINFO:
1453         case IOC_MDC_GETFILESTRIPE: {
1454                 struct ptlrpc_request *request = NULL;
1455                 struct lov_user_md *lump;
1456                 struct lov_mds_md *lmm = NULL;
1457                 struct mdt_body *body;
1458                 char *filename = NULL;
1459                 int lmmsize;
1460
1461                 if (cmd == IOC_MDC_GETFILEINFO ||
1462                     cmd == IOC_MDC_GETFILESTRIPE) {
1463                         filename = getname((const char *)arg);
1464                         if (IS_ERR(filename))
1465                                 RETURN(PTR_ERR(filename));
1466
1467                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1468                                                       &lmmsize, &request);
1469                 } else {
1470                         rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
1471                 }
1472
1473                 if (request) {
1474                         body = req_capsule_server_get(&request->rq_pill,
1475                                                       &RMF_MDT_BODY);
1476                         LASSERT(body != NULL);
1477                 } else {
1478                         GOTO(out_req, rc);
1479                 }
1480
1481                 if (rc < 0) {
1482                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1483                                                cmd == LL_IOC_MDC_GETINFO))
1484                                 GOTO(skip_lmm, rc = 0);
1485                         else
1486                                 GOTO(out_req, rc);
1487                 }
1488
1489                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1490                     cmd == LL_IOC_LOV_GETSTRIPE) {
1491                         lump = (struct lov_user_md *)arg;
1492                 } else {
1493                         struct lov_user_mds_data *lmdp;
1494                         lmdp = (struct lov_user_mds_data *)arg;
1495                         lump = &lmdp->lmd_lmm;
1496                 }
1497                 if (cfs_copy_to_user(lump, lmm, lmmsize)) {
1498                         if (cfs_copy_to_user(lump, lmm, sizeof(*lump)))
1499                                 GOTO(out_req, rc = -EFAULT);
1500                         rc = -EOVERFLOW;
1501                 }
1502         skip_lmm:
1503                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1504                         struct lov_user_mds_data *lmdp;
1505                         lstat_t st = { 0 };
1506
1507                         st.st_dev     = inode->i_sb->s_dev;
1508                         st.st_mode    = body->mode;
1509                         st.st_nlink   = body->nlink;
1510                         st.st_uid     = body->uid;
1511                         st.st_gid     = body->gid;
1512                         st.st_rdev    = body->rdev;
1513                         st.st_size    = body->size;
1514                         st.st_blksize = CFS_PAGE_SIZE;
1515                         st.st_blocks  = body->blocks;
1516                         st.st_atime   = body->atime;
1517                         st.st_mtime   = body->mtime;
1518                         st.st_ctime   = body->ctime;
1519                         st.st_ino     = inode->i_ino;
1520
1521                         lmdp = (struct lov_user_mds_data *)arg;
1522                         if (cfs_copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1523                                 GOTO(out_req, rc = -EFAULT);
1524                 }
1525
1526                 EXIT;
1527         out_req:
1528                 ptlrpc_req_finished(request);
1529                 if (filename)
1530                         putname(filename);
1531                 return rc;
1532         }
1533         case IOC_LOV_GETINFO: {
1534                 struct lov_user_mds_data *lumd;
1535                 struct lov_stripe_md *lsm;
1536                 struct lov_user_md *lum;
1537                 struct lov_mds_md *lmm;
1538                 int lmmsize;
1539                 lstat_t st;
1540
1541                 lumd = (struct lov_user_mds_data *)arg;
1542                 lum = &lumd->lmd_lmm;
1543
1544                 rc = ll_get_max_mdsize(sbi, &lmmsize);
1545                 if (rc)
1546                         RETURN(rc);
1547
1548                 OBD_ALLOC_LARGE(lmm, lmmsize);
1549                 if (cfs_copy_from_user(lmm, lum, lmmsize))
1550                         GOTO(free_lmm, rc = -EFAULT);
1551
1552                 switch (lmm->lmm_magic) {
1553                 case LOV_USER_MAGIC_V1:
1554                         if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
1555                                 break;
1556                         /* swab objects first so that stripes num will be sane */
1557                         lustre_swab_lov_user_md_objects(
1558                                 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
1559                                 ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
1560                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
1561                         break;
1562                 case LOV_USER_MAGIC_V3:
1563                         if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
1564                                 break;
1565                         /* swab objects first so that stripes num will be sane */
1566                         lustre_swab_lov_user_md_objects(
1567                                 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
1568                                 ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
1569                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
1570                         break;
1571                 default:
1572                         GOTO(free_lmm, rc = -EINVAL);
1573                 }
1574
1575                 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1576                 if (rc < 0)
1577                         GOTO(free_lmm, rc = -ENOMEM);
1578
1579                 /* Perform glimpse_size operation. */
1580                 memset(&st, 0, sizeof(st));
1581
1582                 rc = ll_glimpse_ioctl(sbi, lsm, &st);
1583                 if (rc)
1584                         GOTO(free_lsm, rc);
1585
1586                 if (cfs_copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
1587                         GOTO(free_lsm, rc = -EFAULT);
1588
1589                 EXIT;
1590         free_lsm:
1591                 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1592         free_lmm:
1593                 OBD_FREE_LARGE(lmm, lmmsize);
1594                 return rc;
1595         }
1596         case OBD_IOC_LLOG_CATINFO: {
1597                 RETURN(-EOPNOTSUPP);
1598         }
1599         case OBD_IOC_QUOTACHECK: {
1600                 struct obd_quotactl *oqctl;
1601                 int error = 0;
1602
1603                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1604                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1605                         RETURN(-EPERM);
1606
1607                 OBD_ALLOC_PTR(oqctl);
1608                 if (!oqctl)
1609                         RETURN(-ENOMEM);
1610                 oqctl->qc_type = arg;
1611                 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1612                 if (rc < 0) {
1613                         CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1614                         error = rc;
1615                 }
1616
1617                 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1618                 if (rc < 0)
1619                         CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1620
1621                 OBD_FREE_PTR(oqctl);
1622                 return error ?: rc;
1623         }
1624         case OBD_IOC_POLL_QUOTACHECK: {
1625                 struct if_quotacheck *check;
1626
1627                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1628                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1629                         RETURN(-EPERM);
1630
1631                 OBD_ALLOC_PTR(check);
1632                 if (!check)
1633                         RETURN(-ENOMEM);
1634
1635                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1636                                    NULL);
1637                 if (rc) {
1638                         CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1639                         if (cfs_copy_to_user((void *)arg, check,
1640                                              sizeof(*check)))
1641                                 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1642                         GOTO(out_poll, rc);
1643                 }
1644
1645                 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1646                                    NULL);
1647                 if (rc) {
1648                         CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1649                         if (cfs_copy_to_user((void *)arg, check,
1650                                              sizeof(*check)))
1651                                 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1652                         GOTO(out_poll, rc);
1653                 }
1654         out_poll:
1655                 OBD_FREE_PTR(check);
1656                 RETURN(rc);
1657         }
1658 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
1659         case LL_IOC_QUOTACTL_18: {
1660                 /* copy the old 1.x quota struct for internal use, then copy
1661                  * back into old format struct.  For 1.8 compatibility. */
1662                 struct if_quotactl_18 *qctl_18;
1663                 struct if_quotactl *qctl_20;
1664
1665                 OBD_ALLOC_PTR(qctl_18);
1666                 if (!qctl_18)
1667                         RETURN(-ENOMEM);
1668
1669                 OBD_ALLOC_PTR(qctl_20);
1670                 if (!qctl_20)
1671                         GOTO(out_quotactl_18, rc = -ENOMEM);
1672
1673                 if (cfs_copy_from_user(qctl_18, (void *)arg, sizeof(*qctl_18)))
1674                         GOTO(out_quotactl_20, rc = -ENOMEM);
1675
1676                 QCTL_COPY(qctl_20, qctl_18);
1677                 qctl_20->qc_idx = 0;
1678
1679                 /* XXX: dqb_valid was borrowed as a flag to mark that
1680                  *      only mds quota is wanted */
1681                 if (qctl_18->qc_cmd == Q_GETQUOTA &&
1682                     qctl_18->qc_dqblk.dqb_valid) {
1683                         qctl_20->qc_valid = QC_MDTIDX;
1684                         qctl_20->qc_dqblk.dqb_valid = 0;
1685                 } else if (qctl_18->obd_uuid.uuid[0] != '\0') {
1686                         qctl_20->qc_valid = QC_UUID;
1687                         qctl_20->obd_uuid = qctl_18->obd_uuid;
1688                 } else {
1689                         qctl_20->qc_valid = QC_GENERAL;
1690                 }
1691
1692                 rc = quotactl_ioctl(sbi, qctl_20);
1693
1694                 if (rc == 0) {
1695                         QCTL_COPY(qctl_18, qctl_20);
1696                         qctl_18->obd_uuid = qctl_20->obd_uuid;
1697
1698                         if (cfs_copy_to_user((void *)arg, qctl_18,
1699                                              sizeof(*qctl_18)))
1700                                 rc = -EFAULT;
1701                 }
1702
1703         out_quotactl_20:
1704                 OBD_FREE_PTR(qctl_20);
1705         out_quotactl_18:
1706                 OBD_FREE_PTR(qctl_18);
1707                 RETURN(rc);
1708         }
1709 #else
1710 #warning "remove old LL_IOC_QUOTACTL_18 compatibility code"
1711 #endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0) */
1712         case LL_IOC_QUOTACTL: {
1713                 struct if_quotactl *qctl;
1714
1715                 OBD_ALLOC_PTR(qctl);
1716                 if (!qctl)
1717                         RETURN(-ENOMEM);
1718
1719                 if (cfs_copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1720                         GOTO(out_quotactl, rc = -EFAULT);
1721
1722                 rc = quotactl_ioctl(sbi, qctl);
1723
1724                 if (rc == 0 && cfs_copy_to_user((void *)arg,qctl,sizeof(*qctl)))
1725                         rc = -EFAULT;
1726
1727         out_quotactl:
1728                 OBD_FREE_PTR(qctl);
1729                 RETURN(rc);
1730         }
1731         case OBD_IOC_GETDTNAME:
1732         case OBD_IOC_GETMDNAME:
1733                 RETURN(ll_get_obd_name(inode, cmd, arg));
1734         case LL_IOC_FLUSHCTX:
1735                 RETURN(ll_flush_ctx(inode));
1736 #ifdef CONFIG_FS_POSIX_ACL
1737         case LL_IOC_RMTACL: {
1738             if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
1739                 inode == inode->i_sb->s_root->d_inode) {
1740                 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1741
1742                 LASSERT(fd != NULL);
1743                 rc = rct_add(&sbi->ll_rct, cfs_curproc_pid(), arg);
1744                 if (!rc)
1745                         fd->fd_flags |= LL_FILE_RMTACL;
1746                 RETURN(rc);
1747             } else
1748                 RETURN(0);
1749         }
1750 #endif
1751         case LL_IOC_GETOBDCOUNT: {
1752                 int count, vallen;
1753                 struct obd_export *exp;
1754
1755                 if (cfs_copy_from_user(&count, (int *)arg, sizeof(int)))
1756                         RETURN(-EFAULT);
1757
1758                 /* get ost count when count is zero, get mdt count otherwise */
1759                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1760                 vallen = sizeof(count);
1761                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1762                                   KEY_TGT_COUNT, &vallen, &count, NULL);
1763                 if (rc) {
1764                         CERROR("get target count failed: %d\n", rc);
1765                         RETURN(rc);
1766                 }
1767
1768                 if (cfs_copy_to_user((int *)arg, &count, sizeof(int)))
1769                         RETURN(-EFAULT);
1770
1771                 RETURN(0);
1772         }
1773         case LL_IOC_PATH2FID:
1774                 if (cfs_copy_to_user((void *)arg, ll_inode2fid(inode),
1775                                      sizeof(struct lu_fid)))
1776                         RETURN(-EFAULT);
1777                 RETURN(0);
1778         case LL_IOC_GET_CONNECT_FLAGS: {
1779                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void*)arg));
1780         }
1781         case OBD_IOC_CHANGELOG_SEND:
1782         case OBD_IOC_CHANGELOG_CLEAR:
1783                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1784                                     sizeof(struct ioc_changelog));
1785                 RETURN(rc);
1786         case OBD_IOC_FID2PATH:
1787                 RETURN(ll_fid2path(inode, (void *)arg));
1788         case LL_IOC_HSM_REQUEST: {
1789                 struct hsm_user_request *hur;
1790                 int                      totalsize;
1791
1792                 OBD_ALLOC_PTR(hur);
1793                 if (hur == NULL)
1794                         RETURN(-ENOMEM);
1795
1796                 /* We don't know the true size yet; copy the fixed-size part */
1797                 if (cfs_copy_from_user(hur, (void *)arg, sizeof(*hur))) {
1798                         OBD_FREE_PTR(hur);
1799                         RETURN(-EFAULT);
1800                 }
1801
1802                 /* Compute the whole struct size */
1803                 totalsize = hur_len(hur);
1804                 OBD_FREE_PTR(hur);
1805                 OBD_ALLOC_LARGE(hur, totalsize);
1806                 if (hur == NULL)
1807                         RETURN(-ENOMEM);
1808
1809                 /* Copy the whole struct */
1810                 if (cfs_copy_from_user(hur, (void *)arg, totalsize)) {
1811                         OBD_FREE_LARGE(hur, totalsize);
1812                         RETURN(-EFAULT);
1813                 }
1814
1815                 rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1816                                    hur, NULL);
1817
1818                 OBD_FREE_LARGE(hur, totalsize);
1819
1820                 RETURN(rc);
1821         }
1822         case LL_IOC_HSM_PROGRESS: {
1823                 struct hsm_progress_kernel      hpk;
1824                 struct hsm_progress             hp;
1825
1826                 if (cfs_copy_from_user(&hp, (void *)arg, sizeof(hp)))
1827                         RETURN(-EFAULT);
1828
1829                 hpk.hpk_fid = hp.hp_fid;
1830                 hpk.hpk_cookie = hp.hp_cookie;
1831                 hpk.hpk_extent = hp.hp_extent;
1832                 hpk.hpk_flags = hp.hp_flags;
1833                 hpk.hpk_errval = hp.hp_errval;
1834                 hpk.hpk_data_version = 0;
1835
1836                 /* File may not exist in Lustre; all progress
1837                  * reported to Lustre root */
1838                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1839                                    NULL);
1840                 RETURN(rc);
1841         }
1842         case LL_IOC_HSM_CT_START:
1843                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1844                                     sizeof(struct lustre_kernelcomm));
1845                 RETURN(rc);
1846
1847         case LL_IOC_HSM_COPY_START: {
1848                 struct hsm_copy *copy;
1849                 int              rc;
1850
1851                 OBD_ALLOC_PTR(copy);
1852                 if (copy == NULL)
1853                         RETURN(-ENOMEM);
1854                 if (cfs_copy_from_user(copy, (char *)arg, sizeof(*copy))) {
1855                         OBD_FREE_PTR(copy);
1856                         RETURN(-EFAULT);
1857                 }
1858
1859                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1860                 if (cfs_copy_to_user((char *)arg, copy, sizeof(*copy)))
1861                         rc = -EFAULT;
1862
1863                 OBD_FREE_PTR(copy);
1864                 RETURN(rc);
1865         }
1866         case LL_IOC_HSM_COPY_END: {
1867                 struct hsm_copy *copy;
1868                 int              rc;
1869
1870                 OBD_ALLOC_PTR(copy);
1871                 if (copy == NULL)
1872                         RETURN(-ENOMEM);
1873                 if (cfs_copy_from_user(copy, (char *)arg, sizeof(*copy))) {
1874                         OBD_FREE_PTR(copy);
1875                         RETURN(-EFAULT);
1876                 }
1877
1878                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1879                 if (cfs_copy_to_user((char *)arg, copy, sizeof(*copy)))
1880                         rc = -EFAULT;
1881
1882                 OBD_FREE_PTR(copy);
1883                 RETURN(rc);
1884         }
1885         default:
1886                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1887                                      (void *)arg));
1888         }
1889 }
1890
1891 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1892 {
1893         struct inode *inode = file->f_mapping->host;
1894         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1895         struct ll_sb_info *sbi = ll_i2sbi(inode);
1896         int api32 = ll_need_32bit_api(sbi);
1897         loff_t ret = -EINVAL;
1898         ENTRY;
1899
1900         mutex_lock(&inode->i_mutex);
1901         switch (origin) {
1902                 case SEEK_SET:
1903                         break;
1904                 case SEEK_CUR:
1905                         offset += file->f_pos;
1906                         break;
1907                 case SEEK_END:
1908                         if (offset > 0)
1909                                 GOTO(out, ret);
1910                         if (api32)
1911                                 offset += LL_DIR_END_OFF_32BIT;
1912                         else
1913                                 offset += LL_DIR_END_OFF;
1914                         break;
1915                 default:
1916                         GOTO(out, ret);
1917         }
1918
1919         if (offset >= 0 &&
1920             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1921              (!api32 && offset <= LL_DIR_END_OFF))) {
1922                 if (offset != file->f_pos) {
1923                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1924                             (!api32 && offset == LL_DIR_END_OFF))
1925                                 fd->lfd_pos = MDS_DIR_END_OFF;
1926                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1927                                 fd->lfd_pos = offset << 32;
1928                         else
1929                                 fd->lfd_pos = offset;
1930                         file->f_pos = offset;
1931                         file->f_version = 0;
1932                 }
1933                 ret = offset;
1934         }
1935         GOTO(out, ret);
1936
1937 out:
1938         mutex_unlock(&inode->i_mutex);
1939         return ret;
1940 }
1941
1942 int ll_dir_open(struct inode *inode, struct file *file)
1943 {
1944         ENTRY;
1945         RETURN(ll_file_open(inode, file));
1946 }
1947
1948 int ll_dir_release(struct inode *inode, struct file *file)
1949 {
1950         ENTRY;
1951         RETURN(ll_file_release(inode, file));
1952 }
1953
1954 struct file_operations ll_dir_operations = {
1955         .llseek   = ll_dir_seek,
1956         .open     = ll_dir_open,
1957         .release  = ll_dir_release,
1958         .read     = generic_read_dir,
1959         .readdir  = ll_readdir,
1960         .unlocked_ioctl   = ll_dir_ioctl,
1961         .fsync    = ll_fsync,
1962 };