lustre/llite/dir.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  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/smp_lock.h>
  46 #include <asm/uaccess.h>
  47 #include <linux/buffer_head.h>   // for wait_on_buffer
  48
  49 #define DEBUG_SUBSYSTEM S_LLITE
  50
  51 #include <obd_support.h>
  52 #include <obd_class.h>
  53 #include <lustre_lib.h>
  54 #include <lustre/lustre_idl.h>
  55 #include <lustre_lite.h>
  56 #include <lustre_dlm.h>
  57 #include <lustre_fid.h>
  58 #include "llite_internal.h"
  59
  60 #ifndef HAVE_PAGE_CHECKED
  61 #ifdef HAVE_PG_FS_MISC
  62 #define PageChecked(page)        test_bit(PG_fs_misc, &(page)->flags)
  63 #define SetPageChecked(page)     set_bit(PG_fs_misc, &(page)->flags)
  64 #else
  65 #error PageChecked or PageFsMisc not defined in kernel
  66 #endif
  67 #endif
  68
  69 /*
  70  * (new) readdir implementation overview.
  71  *
  72  * Original lustre readdir implementation cached exact copy of raw directory
  73  * pages on the client. These pages were indexed in client page cache by
  74  * logical offset in the directory file. This design, while very simple and
  75  * intuitive had some inherent problems:
  76  *
  77  *     . it implies that byte offset to the directory entry serves as a
  78  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  79  *     ext3/htree directory entries may move due to splits, and more
  80  *     importantly,
  81  *
  82  *     . it is incompatible with the design of split directories for cmd3,
  83  *     that assumes that names are distributed across nodes based on their
  84  *     hash, and so readdir should be done in hash order.
  85  *
  86  * New readdir implementation does readdir in hash order, and uses hash of a
  87  * file name as a telldir/seekdir cookie. This led to number of complications:
  88  *
  89  *     . hash is not unique, so it cannot be used to index cached directory
  90  *     pages on the client (note, that it requires a whole pageful of hash
  91  *     collided entries to cause two pages to have identical hashes);
  92  *
  93  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  94  *     entry cookie. ext3/htree has the same problem and lustre implementation
  95  *     mimics their solution: seekdir(hash) positions directory at the first
  96  *     entry with the given hash.
  97  *
  98  * Client side.
  99  *
 100  * 0. caching
 101  *
 102  * Client caches directory pages using hash of the first entry as an index. As
 103  * noted above hash is not unique, so this solution doesn't work as is:
 104  * special processing is needed for "page hash chains" (i.e., sequences of
 105  * pages filled with entries all having the same hash value).
 106  *
 107  * First, such chains have to be detected. To this end, server returns to the
 108  * client the hash of the first entry on the page next to one returned. When
 109  * client detects that this hash is the same as hash of the first entry on the
 110  * returned page, page hash collision has to be handled. Pages in the
 111  * hash chain, except first one, are termed "overflow pages".
 112  *
 113  * Solution to index uniqueness problem is to not cache overflow
 114  * pages. Instead, when page hash collision is detected, all overflow pages
 115  * from emerging chain are immediately requested from the server and placed in
 116  * a special data structure (struct ll_dir_chain). This data structure is used
 117  * by ll_readdir() to process entries from overflow pages. When readdir
 118  * invocation finishes, overflow pages are discarded. If page hash collision
 119  * chain weren't completely processed, next call to readdir will again detect
 120  * page hash collision, again read overflow pages in, process next portion of
 121  * entries and again discard the pages. This is not as wasteful as it looks,
 122  * because, given reasonable hash, page hash collisions are extremely rare.
 123  *
 124  * 1. directory positioning
 125  *
 126  * When seekdir(hash) is called, original
 127  *
 128  *
 129  *
 130  *
 131  *
 132  *
 133  *
 134  *
 135  * Server.
 136  *
 137  * identification of and access to overflow pages
 138  *
 139  * page format
 140  *
 141  *
 142  *
 143  *
 144  *
 145  */
 146
 147 /* returns the page unlocked, but with a reference */
 148 static int ll_dir_readpage(struct file *file, struct page *page)
 149 {
 150         struct inode *inode = page->mapping->host;
 151         struct ptlrpc_request *request;
 152         struct mdt_body *body;
 153         struct obd_capa *oc;
 154         __u64 hash;
 155         int rc;
 156         ENTRY;
 157
 158         hash = (__u64)hash_x_index(page->index);
 159         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off %lu\n",
 160                inode->i_ino, inode->i_generation, inode, (unsigned long)hash);
 161
 162         oc = ll_mdscapa_get(inode);
 163         rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
 164                          oc, hash, page, &request);
 165         capa_put(oc);
 166         if (!rc) {
 167                 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 168                 /* Checked by mdc_readpage() */
 169                 LASSERT(body != NULL);
 170
 171                 if (body->valid & OBD_MD_FLSIZE)
 172                         cl_isize_write(inode, body->size);
 173                 SetPageUptodate(page);
 174         }
 175         ptlrpc_req_finished(request);
 176
 177         unlock_page(page);
 178         EXIT;
 179         return rc;
 180 }
 181
 182 struct address_space_operations ll_dir_aops = {
 183         .readpage  = ll_dir_readpage,
 184 };
 185
 186 static void ll_check_page(struct inode *dir, struct page *page)
 187 {
 188         /* XXX: check page format later */
 189         SetPageChecked(page);
 190 }
 191
 192 static void ll_release_page(struct page *page, __u64 hash,
 193                             __u64 start, __u64 end)
 194 {
 195         kunmap(page);
 196         lock_page(page);
 197         if (likely(page->mapping != NULL)) {
 198                 ll_truncate_complete_page(page);
 199                 unlock_page(page);
 200         } else {
 201                 unlock_page(page);
 202                 CWARN("NULL mapping page %p, truncated by others: "
 203                       "hash("LPX64") | start("LPX64") | end("LPX64")\n",
 204                       page, hash, start, end);
 205         }
 206         page_cache_release(page);
 207 }
 208
 209 /*
 210  * Find, kmap and return page that contains given hash.
 211  */
 212 static struct page *ll_dir_page_locate(struct inode *dir, __u64 hash,
 213                                        __u64 *start, __u64 *end)
 214 {
 215         struct address_space *mapping = dir->i_mapping;
 216         /*
 217          * Complement of hash is used as an index so that
 218          * radix_tree_gang_lookup() can be used to find a page with starting
 219          * hash _smaller_ than one we are looking for.
 220          */
 221         unsigned long offset = hash_x_index((unsigned long)hash);
 222         struct page *page;
 223         int found;
 224
 225         TREE_READ_LOCK_IRQ(mapping);
 226         found = radix_tree_gang_lookup(&mapping->page_tree,
 227                                        (void **)&page, offset, 1);
 228         if (found > 0) {
 229                 struct lu_dirpage *dp;
 230
 231                 page_cache_get(page);
 232                 TREE_READ_UNLOCK_IRQ(mapping);
 233                 /*
 234                  * In contrast to find_lock_page() we are sure that directory
 235                  * page cannot be truncated (while DLM lock is held) and,
 236                  * hence, can avoid restart.
 237                  *
 238                  * In fact, page cannot be locked here at all, because
 239                  * ll_dir_readpage() does synchronous io.
 240                  */
 241                 wait_on_page(page);
 242                 if (PageUptodate(page)) {
 243                         dp = kmap(page);
 244                         *start = le64_to_cpu(dp->ldp_hash_start);
 245                         *end   = le64_to_cpu(dp->ldp_hash_end);
 246                         LASSERT(*start <= hash);
 247                         if (hash > *end || (*end != *start && hash == *end)) {
 248                                 ll_release_page(page, hash, *start, *end);
 249                                 page = NULL;
 250                         }
 251                 } else {
 252                         page_cache_release(page);
 253                         page = ERR_PTR(-EIO);
 254                 }
 255
 256         } else {
 257                 TREE_READ_UNLOCK_IRQ(mapping);
 258                 page = NULL;
 259         }
 260         return page;
 261 }
 262
 263 struct page *ll_get_dir_page(struct inode *dir, __u64 hash, int exact,
 264                              struct ll_dir_chain *chain)
 265 {
 266         ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
 267         struct address_space *mapping = dir->i_mapping;
 268         struct lustre_handle lockh;
 269         struct lu_dirpage *dp;
 270         struct page *page;
 271         ldlm_mode_t mode;
 272         int rc;
 273         __u64 start = 0;
 274         __u64 end = 0;
 275
 276         mode = LCK_PR;
 277         rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
 278                            ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
 279         if (!rc) {
 280                 struct ldlm_enqueue_info einfo = { LDLM_IBITS, mode,
 281                        ll_md_blocking_ast, ldlm_completion_ast,
 282                        NULL, NULL, dir };
 283                 struct lookup_intent it = { .it_op = IT_READDIR };
 284                 struct ptlrpc_request *request;
 285                 struct md_op_data *op_data;
 286
 287                 op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
 288                                              LUSTRE_OPC_ANY, NULL);
 289                 if (IS_ERR(op_data))
 290                         return (void *)op_data;
 291
 292                 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
 293                                 op_data, &lockh, NULL, 0, NULL, 0);
 294
 295                 ll_finish_md_op_data(op_data);
 296
 297                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 298                 if (request)
 299                         ptlrpc_req_finished(request);
 300                 if (rc < 0) {
 301                         CERROR("lock enqueue: "DFID" at "LPU64": rc %d\n",
 302                                PFID(ll_inode2fid(dir)), hash, rc);
 303                         return ERR_PTR(rc);
 304                 }
 305         } else {
 306                 /* for cross-ref object, l_ast_data of the lock may not be set,
 307                  * we reset it here */
 308                 md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
 309                                  dir, NULL);
 310         }
 311         ldlm_lock_dump_handle(D_OTHER, &lockh);
 312
 313         page = ll_dir_page_locate(dir, hash, &start, &end);
 314         if (IS_ERR(page)) {
 315                 CERROR("dir page locate: "DFID" at "LPU64": rc %ld\n",
 316                        PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
 317                 GOTO(out_unlock, page);
 318         }
 319
 320         if (page != NULL) {
 321                 /*
 322                  * XXX nikita: not entirely correct handling of a corner case:
 323                  * suppose hash chain of entries with hash value HASH crosses
 324                  * border between pages P0 and P1. First both P0 and P1 are
 325                  * cached, seekdir() is called for some entry from the P0 part
 326                  * of the chain. Later P0 goes out of cache. telldir(HASH)
 327                  * happens and finds P1, as it starts with matching hash
 328                  * value. Remaining entries from P0 part of the chain are
 329                  * skipped. (Is that really a bug?)
 330                  *
 331                  * Possible solutions: 0. don't cache P1 is such case, handle
 332                  * it as an "overflow" page. 1. invalidate all pages at
 333                  * once. 2. use HASH|1 as an index for P1.
 334                  */
 335                 if (exact && hash != start) {
 336                         /*
 337                          * readdir asked for a page starting _exactly_ from
 338                          * given hash, but cache contains stale page, with
 339                          * entries with smaller hash values. Stale page should
 340                          * be invalidated, and new one fetched.
 341                          */
 342                         CDEBUG(D_OTHER, "Stale readpage page %p: "LPX64" != "LPX64"\n",
 343                                page, hash, start);
 344                         ll_release_page(page, hash, start, end);
 345                 } else {
 346                         GOTO(hash_collision, page);
 347                 }
 348         }
 349
 350         page = read_cache_page(mapping, hash_x_index((unsigned long)hash),
 351                                (filler_t*)mapping->a_ops->readpage, NULL);
 352         if (IS_ERR(page)) {
 353                 CERROR("read cache page: "DFID" at "LPU64": rc %ld\n",
 354                        PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
 355                 GOTO(out_unlock, page);
 356         }
 357
 358         wait_on_page(page);
 359         (void)kmap(page);
 360         if (!PageUptodate(page)) {
 361                 CERROR("page not updated: "DFID" at "LPU64": rc %d\n",
 362                        PFID(ll_inode2fid(dir)), hash, -5);
 363                 goto fail;
 364         }
 365         if (!PageChecked(page))
 366                 ll_check_page(dir, page);
 367         if (PageError(page)) {
 368                 CERROR("page error: "DFID" at "LPU64": rc %d\n",
 369                        PFID(ll_inode2fid(dir)), hash, -5);
 370                 goto fail;
 371         }
 372 hash_collision:
 373         dp = page_address(page);
 374
 375         start = le64_to_cpu(dp->ldp_hash_start);
 376         end   = le64_to_cpu(dp->ldp_hash_end);
 377         if (end == start) {
 378                 LASSERT(start == hash);
 379                 CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
 380                 /*
 381                  * Fetch whole overflow chain...
 382                  *
 383                  * XXX not yet.
 384                  */
 385                 goto fail;
 386         }
 387 out_unlock:
 388         ldlm_lock_decref(&lockh, mode);
 389         return page;
 390
 391 fail:
 392         ll_put_page(page);
 393         page = ERR_PTR(-EIO);
 394         goto out_unlock;
 395 }
 396
 397 int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 398 {
 399         struct inode         *inode = filp->f_dentry->d_inode;
 400         struct ll_inode_info *info  = ll_i2info(inode);
 401         __u64                 pos   = filp->f_pos;
 402         struct ll_sb_info    *sbi  = ll_i2sbi(inode);
 403         struct page          *page;
 404         struct ll_dir_chain   chain;
 405         int rc, need_32bit;
 406         int done;
 407         int shift;
 408         __u16 type;
 409         ENTRY;
 410
 411         need_32bit = ll_need_32bit_api(sbi);
 412         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu 32bit_api %d\n",
 413                inode->i_ino, inode->i_generation, inode,
 414                (unsigned long)pos, i_size_read(inode), need_32bit);
 415
 416         if (pos == DIR_END_OFF)
 417                 /*
 418                  * end-of-file.
 419                  */
 420                 RETURN(0);
 421
 422         rc    = 0;
 423         done  = 0;
 424         shift = 0;
 425         ll_dir_chain_init(&chain);
 426
 427         page = ll_get_dir_page(inode, pos, 0, &chain);
 428
 429         while (rc == 0 && !done) {
 430                 struct lu_dirpage *dp;
 431                 struct lu_dirent  *ent;
 432
 433                 if (!IS_ERR(page)) {
 434                         /*
 435                          * If page is empty (end of directory is reached),
 436                          * use this value.
 437                          */
 438                         __u64 hash = DIR_END_OFF;
 439                         __u64 next;
 440
 441                         dp = page_address(page);
 442                         for (ent = lu_dirent_start(dp); ent != NULL && !done;
 443                              ent = lu_dirent_next(ent)) {
 444                                 char          *name;
 445                                 int            namelen;
 446                                 struct lu_fid  fid;
 447                                 __u64          ino;
 448
 449                                 /*
 450                                  * XXX: implement correct swabbing here.
 451                                  */
 452
 453                                 hash    = le64_to_cpu(ent->lde_hash);
 454                                 namelen = le16_to_cpu(ent->lde_namelen);
 455
 456                                 if (hash < pos)
 457                                         /*
 458                                          * Skip until we find target hash
 459                                          * value.
 460                                          */
 461                                         continue;
 462
 463                                 if (namelen == 0)
 464                                         /*
 465                                          * Skip dummy record.
 466                                          */
 467                                         continue;
 468
 469                                 fid  = ent->lde_fid;
 470                                 name = ent->lde_name;
 471                                 fid_le_to_cpu(&fid, &fid);
 472                                 if (need_32bit)
 473                                         ino = cl_fid_build_ino32(&fid);
 474                                 else
 475                                         ino = cl_fid_build_ino(&fid);
 476                                 type = ll_dirent_type_get(ent);
 477                                 done = filldir(cookie, name, namelen,
 478                                                (loff_t)hash, ino, type);
 479                         }
 480                         next = le64_to_cpu(dp->ldp_hash_end);
 481                         ll_put_page(page);
 482                         if (!done) {
 483                                 pos = next;
 484                                 if (pos == DIR_END_OFF)
 485                                         /*
 486                                          * End of directory reached.
 487                                          */
 488                                         done = 1;
 489                                 else if (1 /* chain is exhausted*/)
 490                                         /*
 491                                          * Normal case: continue to the next
 492                                          * page.
 493                                          */
 494                                         page = ll_get_dir_page(inode, pos, 1,
 495                                                                &chain);
 496                                 else {
 497                                         /*
 498                                          * go into overflow page.
 499                                          */
 500                                 }
 501                         } else
 502                                 pos = hash;
 503                 } else {
 504                         rc = PTR_ERR(page);
 505                         CERROR("error reading dir "DFID" at %lu: rc %d\n",
 506                                PFID(&info->lli_fid), (unsigned long)pos, rc);
 507                 }
 508         }
 509
 510         filp->f_pos = (loff_t)pos;
 511         filp->f_version = inode->i_version;
 512         touch_atime(filp->f_vfsmnt, filp->f_dentry);
 513
 514         ll_dir_chain_fini(&chain);
 515
 516         RETURN(rc);
 517 }
 518
 519 int ll_send_mgc_param(struct obd_export *mgc, char *string)
 520 {
 521         struct mgs_send_param *msp;
 522         int rc = 0;
 523
 524         OBD_ALLOC_PTR(msp);
 525         if (!msp)
 526                 return -ENOMEM;
 527
 528         strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
 529         rc = obd_set_info_async(mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 530                                 sizeof(struct mgs_send_param), msp, NULL);
 531         if (rc)
 532                 CERROR("Failed to set parameter: %d\n", rc);
 533         OBD_FREE_PTR(msp);
 534
 535         return rc;
 536 }
 537
 538 char *ll_get_fsname(struct inode *inode)
 539 {
 540         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 541         char *ptr, *fsname;
 542         int len;
 543
 544         OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
 545         len = strlen(lsi->lsi_lmd->lmd_profile);
 546         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 547         if (ptr && (strcmp(ptr, "-client") == 0))
 548                 len -= 7;
 549         strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
 550         fsname[len] = '\0';
 551
 552         return fsname;
 553 }
 554
 555 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 556                      int set_default)
 557 {
 558         struct ll_sb_info *sbi = ll_i2sbi(inode);
 559         struct md_op_data *op_data;
 560         struct ptlrpc_request *req = NULL;
 561         int rc = 0;
 562         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 563         struct obd_device *mgc = lsi->lsi_mgc;
 564         char *fsname = NULL, *param = NULL;
 565         int lum_size;
 566
 567         if (lump != NULL) {
 568                 /*
 569                  * This is coming from userspace, so should be in
 570                  * local endian.  But the MDS would like it in little
 571                  * endian, so we swab it before we send it.
 572                  */
 573                 switch (lump->lmm_magic) {
 574                 case LOV_USER_MAGIC_V1: {
 575                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 576                                 lustre_swab_lov_user_md_v1(lump);
 577                         lum_size = sizeof(struct lov_user_md_v1);
 578                         break;
 579                         }
 580                 case LOV_USER_MAGIC_V3: {
 581                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 582                                 lustre_swab_lov_user_md_v3(
 583                                         (struct lov_user_md_v3 *)lump);
 584                         lum_size = sizeof(struct lov_user_md_v3);
 585                         break;
 586                         }
 587                 default: {
 588                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 589                                         " %#08x != %#08x nor %#08x\n",
 590                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 591                                         LOV_USER_MAGIC_V3);
 592                         RETURN(-EINVAL);
 593                         }
 594                }
 595         } else {
 596                 lum_size = sizeof(struct lov_user_md_v1);
 597         }
 598
 599         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 600                                      LUSTRE_OPC_ANY, NULL);
 601         if (IS_ERR(op_data))
 602                 RETURN(PTR_ERR(op_data));
 603
 604         /* swabbing is done in lov_setstripe() on server side */
 605         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
 606                         NULL, 0, &req, NULL);
 607         ll_finish_md_op_data(op_data);
 608         ptlrpc_req_finished(req);
 609         if (rc) {
 610                 if (rc != -EPERM && rc != -EACCES)
 611                         CERROR("mdc_setattr fails: rc = %d\n", rc);
 612         }
 613
 614         /* In the following we use the fact that LOV_USER_MAGIC_V1 and
 615          LOV_USER_MAGIC_V3 have the same initial fields so we do not
 616          need the make the distiction between the 2 versions */
 617         if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
 618                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 619
 620                 /* Get fsname and assume devname to be -MDT0000. */
 621                 fsname = ll_get_fsname(inode);
 622                 /* Set root stripesize */
 623                 sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
 624                         lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 625                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 626                 if (rc)
 627                         goto end;
 628
 629                 /* Set root stripecount */
 630                 sprintf(param, "%s-MDT0000.lov.stripecount=%hd", fsname,
 631                         lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 632                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 633                 if (rc)
 634                         goto end;
 635
 636                 /* Set root stripeoffset */
 637                 sprintf(param, "%s-MDT0000.lov.stripeoffset=%hd", fsname,
 638                         lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 639                         (typeof(lump->lmm_stripe_offset))(-1));
 640                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 641                 if (rc)
 642                         goto end;
 643 end:
 644                 if (fsname)
 645                         OBD_FREE(fsname, MGS_PARAM_MAXLEN);
 646                 if (param)
 647                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 648         }
 649         return rc;
 650 }
 651
 652 int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 653                      int *lmm_size, struct ptlrpc_request **request)
 654 {
 655         struct ll_sb_info *sbi = ll_i2sbi(inode);
 656         struct mdt_body   *body;
 657         struct lov_mds_md *lmm = NULL;
 658         struct ptlrpc_request *req = NULL;
 659         int rc, lmmsize;
 660         struct md_op_data *op_data;
 661
 662         rc = ll_get_max_mdsize(sbi, &lmmsize);
 663         if (rc)
 664                 RETURN(rc);
 665
 666         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 667                                      0, lmmsize, LUSTRE_OPC_ANY,
 668                                      NULL);
 669         if (op_data == NULL)
 670                 RETURN(-ENOMEM);
 671
 672         op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 673         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 674         ll_finish_md_op_data(op_data);
 675         if (rc < 0) {
 676                 CDEBUG(D_INFO, "md_getattr failed on inode "
 677                        "%lu/%u: rc %d\n", inode->i_ino,
 678                        inode->i_generation, rc);
 679                 GOTO(out, rc);
 680         }
 681
 682         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 683         LASSERT(body != NULL);
 684
 685         lmmsize = body->eadatasize;
 686
 687         if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 688             lmmsize == 0) {
 689                 GOTO(out, rc = -ENODATA);
 690         }
 691
 692         lmm = req_capsule_server_sized_get(&req->rq_pill,
 693                                            &RMF_MDT_MD, lmmsize);
 694         LASSERT(lmm != NULL);
 695
 696         /*
 697          * This is coming from the MDS, so is probably in
 698          * little endian.  We convert it to host endian before
 699          * passing it to userspace.
 700          */
 701         /* We don't swab objects for directories */
 702         switch (le32_to_cpu(lmm->lmm_magic)) {
 703         case LOV_MAGIC_V1:
 704                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 705                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 706                 break;
 707         case LOV_MAGIC_V3:
 708                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 709                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 710                 break;
 711         default:
 712                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 713                 rc = -EPROTO;
 714         }
 715 out:
 716         *lmmp = lmm;
 717         *lmm_size = lmmsize;
 718         *request = req;
 719         return rc;
 720 }
 721
 722 /*
 723  *  Get MDT index for the inode.
 724  */
 725 int ll_get_mdt_idx(struct inode *inode)
 726 {
 727         struct ll_sb_info *sbi = ll_i2sbi(inode);
 728         struct md_op_data *op_data;
 729         int rc, mdtidx;
 730         ENTRY;
 731
 732         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
 733                                      0, LUSTRE_OPC_ANY, NULL);
 734         if (op_data == NULL)
 735                 RETURN(-ENOMEM);
 736
 737         op_data->op_valid |= OBD_MD_MDTIDX;
 738         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 739         mdtidx = op_data->op_mds;
 740         ll_finish_md_op_data(op_data);
 741         if (rc < 0) {
 742                 CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 743                 RETURN(rc);
 744         }
 745         return mdtidx;
 746 }
 747
 748 static int copy_and_ioctl(int cmd, struct obd_export *exp, void *data, int len)
 749 {
 750         void *ptr;
 751         int rc;
 752
 753         OBD_ALLOC(ptr, len);
 754         if (ptr == NULL)
 755                 return -ENOMEM;
 756         if (cfs_copy_from_user(ptr, data, len)) {
 757                 OBD_FREE(ptr, len);
 758                 return -EFAULT;
 759         }
 760         rc = obd_iocontrol(cmd, exp, len, data, NULL);
 761         OBD_FREE(ptr, len);
 762         return rc;
 763 }
 764
 765 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 766                         unsigned int cmd, unsigned long arg)
 767 {
 768         struct ll_sb_info *sbi = ll_i2sbi(inode);
 769         struct obd_ioctl_data *data;
 770         int rc = 0;
 771         ENTRY;
 772
 773         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 774                inode->i_ino, inode->i_generation, inode, cmd);
 775
 776         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
 777         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
 778                 return -ENOTTY;
 779
 780         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
 781         switch(cmd) {
 782         case FSFILT_IOC_GETFLAGS:
 783         case FSFILT_IOC_SETFLAGS:
 784                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 785         case FSFILT_IOC_GETVERSION_OLD:
 786         case FSFILT_IOC_GETVERSION:
 787                 RETURN(put_user(inode->i_generation, (int *)arg));
 788         /* We need to special case any other ioctls we want to handle,
 789          * to send them to the MDS/OST as appropriate and to properly
 790          * network encode the arg field.
 791         case FSFILT_IOC_SETVERSION_OLD:
 792         case FSFILT_IOC_SETVERSION:
 793         */
 794         case LL_IOC_GET_MDTIDX: {
 795                 int mdtidx;
 796
 797                 mdtidx = ll_get_mdt_idx(inode);
 798                 if (mdtidx < 0)
 799                         RETURN(mdtidx);
 800
 801                 if (put_user((int)mdtidx, (int*)arg))
 802                         RETURN(-EFAULT);
 803
 804                 return 0;
 805         }
 806         case IOC_MDC_LOOKUP: {
 807                 struct ptlrpc_request *request = NULL;
 808                 int namelen, len = 0;
 809                 char *buf = NULL;
 810                 char *filename;
 811                 struct md_op_data *op_data;
 812
 813                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 814                 if (rc)
 815                         RETURN(rc);
 816                 data = (void *)buf;
 817
 818                 filename = data->ioc_inlbuf1;
 819                 namelen = strlen(filename);
 820
 821                 if (namelen < 1) {
 822                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 823                         GOTO(out_free, rc = -EINVAL);
 824                 }
 825
 826                 op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
 827                                              0, LUSTRE_OPC_ANY, NULL);
 828                 if (op_data == NULL)
 829                         GOTO(out_free, rc = -ENOMEM);
 830
 831                 op_data->op_valid = OBD_MD_FLID;
 832                 rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
 833                 ll_finish_md_op_data(op_data);
 834                 if (rc < 0) {
 835                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 836                         GOTO(out_free, rc);
 837                 }
 838                 ptlrpc_req_finished(request);
 839                 EXIT;
 840 out_free:
 841                 obd_ioctl_freedata(buf, len);
 842                 return rc;
 843         }
 844         case LL_IOC_LOV_SETSTRIPE: {
 845                 struct lov_user_md_v3 lumv3;
 846                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
 847                 struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
 848                 struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
 849
 850                 int set_default = 0;
 851
 852                 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
 853                 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
 854                         sizeof(lumv3p->lmm_objects[0]));
 855                 /* first try with v1 which is smaller than v3 */
 856                 if (cfs_copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
 857                         RETURN(-EFAULT);
 858
 859                 if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
 860                         if (cfs_copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
 861                                 RETURN(-EFAULT);
 862                 }
 863
 864                 if (inode->i_sb->s_root == file->f_dentry)
 865                         set_default = 1;
 866
 867                 /* in v1 and v3 cases lumv1 points to data */
 868                 rc = ll_dir_setstripe(inode, lumv1, set_default);
 869
 870                 RETURN(rc);
 871         }
 872         case LL_IOC_OBD_STATFS:
 873                 RETURN(ll_obd_statfs(inode, (void *)arg));
 874         case LL_IOC_LOV_GETSTRIPE:
 875         case LL_IOC_MDC_GETINFO:
 876         case IOC_MDC_GETFILEINFO:
 877         case IOC_MDC_GETFILESTRIPE: {
 878                 struct ptlrpc_request *request = NULL;
 879                 struct lov_user_md *lump;
 880                 struct lov_mds_md *lmm = NULL;
 881                 struct mdt_body *body;
 882                 char *filename = NULL;
 883                 int lmmsize;
 884
 885                 if (cmd == IOC_MDC_GETFILEINFO ||
 886                     cmd == IOC_MDC_GETFILESTRIPE) {
 887                         filename = getname((const char *)arg);
 888                         if (IS_ERR(filename))
 889                                 RETURN(PTR_ERR(filename));
 890
 891                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
 892                                                       &lmmsize, &request);
 893                 } else {
 894                         rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
 895                 }
 896
 897                 if (request) {
 898                         body = req_capsule_server_get(&request->rq_pill,
 899                                                       &RMF_MDT_BODY);
 900                         LASSERT(body != NULL);
 901                 } else {
 902                         GOTO(out_req, rc);
 903                 }
 904
 905                 if (rc < 0) {
 906                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
 907                                                cmd == LL_IOC_MDC_GETINFO))
 908                                 GOTO(skip_lmm, rc = 0);
 909                         else
 910                                 GOTO(out_req, rc);
 911                 }
 912
 913                 if (cmd == IOC_MDC_GETFILESTRIPE ||
 914                     cmd == LL_IOC_LOV_GETSTRIPE) {
 915                         lump = (struct lov_user_md *)arg;
 916                 } else {
 917                         struct lov_user_mds_data *lmdp;
 918                         lmdp = (struct lov_user_mds_data *)arg;
 919                         lump = &lmdp->lmd_lmm;
 920                 }
 921                 if (cfs_copy_to_user(lump, lmm, lmmsize)) {
 922                         if (cfs_copy_to_user(lump, lmm, sizeof(*lump)))
 923                                 GOTO(out_req, rc = -EFAULT);
 924                         rc = -EOVERFLOW;
 925                 }
 926         skip_lmm:
 927                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
 928                         struct lov_user_mds_data *lmdp;
 929                         lstat_t st = { 0 };
 930
 931                         st.st_dev     = inode->i_sb->s_dev;
 932                         st.st_mode    = body->mode;
 933                         st.st_nlink   = body->nlink;
 934                         st.st_uid     = body->uid;
 935                         st.st_gid     = body->gid;
 936                         st.st_rdev    = body->rdev;
 937                         st.st_size    = body->size;
 938                         st.st_blksize = CFS_PAGE_SIZE;
 939                         st.st_blocks  = body->blocks;
 940                         st.st_atime   = body->atime;
 941                         st.st_mtime   = body->mtime;
 942                         st.st_ctime   = body->ctime;
 943                         st.st_ino     = inode->i_ino;
 944
 945                         lmdp = (struct lov_user_mds_data *)arg;
 946                         if (cfs_copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
 947                                 GOTO(out_req, rc = -EFAULT);
 948                 }
 949
 950                 EXIT;
 951         out_req:
 952                 ptlrpc_req_finished(request);
 953                 if (filename)
 954                         putname(filename);
 955                 return rc;
 956         }
 957         case IOC_LOV_GETINFO: {
 958                 struct lov_user_mds_data *lumd;
 959                 struct lov_stripe_md *lsm;
 960                 struct lov_user_md *lum;
 961                 struct lov_mds_md *lmm;
 962                 int lmmsize;
 963                 lstat_t st;
 964
 965                 lumd = (struct lov_user_mds_data *)arg;
 966                 lum = &lumd->lmd_lmm;
 967
 968                 rc = ll_get_max_mdsize(sbi, &lmmsize);
 969                 if (rc)
 970                         RETURN(rc);
 971
 972                 OBD_ALLOC_LARGE(lmm, lmmsize);
 973                 if (cfs_copy_from_user(lmm, lum, lmmsize))
 974                         GOTO(free_lmm, rc = -EFAULT);
 975
 976                 switch (lmm->lmm_magic) {
 977                 case LOV_USER_MAGIC_V1:
 978                         if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
 979                                 break;
 980                         /* swab objects first so that stripes num will be sane */
 981                         lustre_swab_lov_user_md_objects(
 982                                 ((struct lov_user_md_v1 *)lmm)->lmm_objects,
 983                                 ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
 984                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 985                         break;
 986                 case LOV_USER_MAGIC_V3:
 987                         if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
 988                                 break;
 989                         /* swab objects first so that stripes num will be sane */
 990                         lustre_swab_lov_user_md_objects(
 991                                 ((struct lov_user_md_v3 *)lmm)->lmm_objects,
 992                                 ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
 993                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 994                         break;
 995                 default:
 996                         GOTO(free_lmm, rc = -EINVAL);
 997                 }
 998
 999                 rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
1000                 if (rc < 0)
1001                         GOTO(free_lmm, rc = -ENOMEM);
1002
1003                 /* Perform glimpse_size operation. */
1004                 memset(&st, 0, sizeof(st));
1005
1006                 rc = ll_glimpse_ioctl(sbi, lsm, &st);
1007                 if (rc)
1008                         GOTO(free_lsm, rc);
1009
1010                 if (cfs_copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
1011                         GOTO(free_lsm, rc = -EFAULT);
1012
1013                 EXIT;
1014         free_lsm:
1015                 obd_free_memmd(sbi->ll_dt_exp, &lsm);
1016         free_lmm:
1017                 OBD_FREE_LARGE(lmm, lmmsize);
1018                 return rc;
1019         }
1020         case OBD_IOC_LLOG_CATINFO: {
1021                 struct ptlrpc_request *req = NULL;
1022                 char                  *buf = NULL;
1023                 char                  *str;
1024                 int                    len = 0;
1025
1026                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
1027                 if (rc)
1028                         RETURN(rc);
1029                 data = (void *)buf;
1030
1031                 if (!data->ioc_inlbuf1) {
1032                         obd_ioctl_freedata(buf, len);
1033                         RETURN(-EINVAL);
1034                 }
1035
1036                 req = ptlrpc_request_alloc(sbi2mdc(sbi)->cl_import,
1037                                            &RQF_LLOG_CATINFO);
1038                 if (req == NULL)
1039                         GOTO(out_catinfo, rc = -ENOMEM);
1040
1041                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
1042                                      data->ioc_inllen1);
1043                 req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_CLIENT,
1044                                      data->ioc_inllen2);
1045
1046                 rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION, LLOG_CATINFO);
1047                 if (rc) {
1048                         ptlrpc_request_free(req);
1049                         GOTO(out_catinfo, rc);
1050                 }
1051
1052                 str = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
1053                 memcpy(str, data->ioc_inlbuf1, data->ioc_inllen1);
1054                 if (data->ioc_inllen2) {
1055                         str = req_capsule_client_get(&req->rq_pill,
1056                                                      &RMF_STRING);
1057                         memcpy(str, data->ioc_inlbuf2, data->ioc_inllen2);
1058                 }
1059
1060                 req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_SERVER,
1061                                      data->ioc_plen1);
1062                 ptlrpc_request_set_replen(req);
1063
1064                 rc = ptlrpc_queue_wait(req);
1065                 if (!rc) {
1066                         str = req_capsule_server_get(&req->rq_pill,
1067                                                      &RMF_STRING);
1068                         if (cfs_copy_to_user(data->ioc_pbuf1, str,
1069                                              data->ioc_plen1))
1070                                 rc = -EFAULT;
1071                 }
1072                 ptlrpc_req_finished(req);
1073         out_catinfo:
1074                 obd_ioctl_freedata(buf, len);
1075                 RETURN(rc);
1076         }
1077         case OBD_IOC_QUOTACHECK: {
1078                 struct obd_quotactl *oqctl;
1079                 int error = 0;
1080
1081                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1082                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1083                         RETURN(-EPERM);
1084
1085                 OBD_ALLOC_PTR(oqctl);
1086                 if (!oqctl)
1087                         RETURN(-ENOMEM);
1088                 oqctl->qc_type = arg;
1089                 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1090                 if (rc < 0) {
1091                         CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1092                         error = rc;
1093                 }
1094
1095                 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1096                 if (rc < 0)
1097                         CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1098
1099                 OBD_FREE_PTR(oqctl);
1100                 return error ?: rc;
1101         }
1102         case OBD_IOC_POLL_QUOTACHECK: {
1103                 struct if_quotacheck *check;
1104
1105                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1106                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1107                         RETURN(-EPERM);
1108
1109                 OBD_ALLOC_PTR(check);
1110                 if (!check)
1111                         RETURN(-ENOMEM);
1112
1113                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1114                                    NULL);
1115                 if (rc) {
1116                         CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1117                         if (cfs_copy_to_user((void *)arg, check,
1118                                              sizeof(*check)))
1119                                 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1120                         GOTO(out_poll, rc);
1121                 }
1122
1123                 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1124                                    NULL);
1125                 if (rc) {
1126                         CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1127                         if (cfs_copy_to_user((void *)arg, check,
1128                                              sizeof(*check)))
1129                                 CDEBUG(D_QUOTA, "cfs_copy_to_user failed\n");
1130                         GOTO(out_poll, rc);
1131                 }
1132         out_poll:
1133                 OBD_FREE_PTR(check);
1134                 RETURN(rc);
1135         }
1136         case OBD_IOC_QUOTACTL: {
1137                 struct if_quotactl *qctl;
1138                 int cmd, type, id, valid;
1139
1140                 OBD_ALLOC_PTR(qctl);
1141                 if (!qctl)
1142                         RETURN(-ENOMEM);
1143
1144                 if (cfs_copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
1145                         GOTO(out_quotactl, rc = -EFAULT);
1146
1147                 cmd = qctl->qc_cmd;
1148                 type = qctl->qc_type;
1149                 id = qctl->qc_id;
1150                 valid = qctl->qc_valid;
1151
1152                 switch (cmd) {
1153                 case LUSTRE_Q_INVALIDATE:
1154                 case LUSTRE_Q_FINVALIDATE:
1155                 case Q_QUOTAON:
1156                 case Q_QUOTAOFF:
1157                 case Q_SETQUOTA:
1158                 case Q_SETINFO:
1159                         if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1160                             sbi->ll_flags & LL_SBI_RMT_CLIENT)
1161                                 GOTO(out_quotactl, rc = -EPERM);
1162                         break;
1163                 case Q_GETQUOTA:
1164                         if (((type == USRQUOTA && cfs_curproc_euid() != id) ||
1165                              (type == GRPQUOTA && !in_egroup_p(id))) &&
1166                             (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1167                              sbi->ll_flags & LL_SBI_RMT_CLIENT))
1168                                 GOTO(out_quotactl, rc = -EPERM);
1169                         break;
1170                 case Q_GETINFO:
1171                         break;
1172                 default:
1173                         CERROR("unsupported quotactl op: %#x\n", cmd);
1174                         GOTO(out_quotactl, rc = -ENOTTY);
1175                 }
1176
1177                 if (valid != QC_GENERAL) {
1178                         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
1179                                 GOTO(out_quotactl, rc = -EOPNOTSUPP);
1180
1181                         if (cmd == Q_GETINFO)
1182                                 qctl->qc_cmd = Q_GETOINFO;
1183                         else if (cmd == Q_GETQUOTA)
1184                                 qctl->qc_cmd = Q_GETOQUOTA;
1185                         else
1186                                 GOTO(out_quotactl, rc = -EINVAL);
1187
1188                         switch (valid) {
1189                         case QC_MDTIDX:
1190                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1191                                                    sbi->ll_md_exp,
1192                                                    sizeof(*qctl), qctl, NULL);
1193                                 break;
1194                         case QC_OSTIDX:
1195                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1196                                                    sbi->ll_dt_exp,
1197                                                    sizeof(*qctl), qctl, NULL);
1198                                 break;
1199                         case QC_UUID:
1200                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1201                                                    sbi->ll_md_exp,
1202                                                    sizeof(*qctl), qctl, NULL);
1203                                 if (rc == -EAGAIN)
1204                                         rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1205                                                            sbi->ll_dt_exp,
1206                                                            sizeof(*qctl), qctl,
1207                                                            NULL);
1208                                 break;
1209                         default:
1210                                 rc = -EINVAL;
1211                                 break;
1212                         }
1213
1214                         if (rc)
1215                                 GOTO(out_quotactl, rc);
1216                         else
1217                                 qctl->qc_cmd = cmd;
1218                 } else {
1219                         struct obd_quotactl *oqctl;
1220
1221                         OBD_ALLOC_PTR(oqctl);
1222                         if (!oqctl)
1223                                 GOTO(out_quotactl, rc = -ENOMEM);
1224
1225                         QCTL_COPY(oqctl, qctl);
1226                         rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1227                         if (rc) {
1228                                 if (rc != -EALREADY && cmd == Q_QUOTAON) {
1229                                         oqctl->qc_cmd = Q_QUOTAOFF;
1230                                         obd_quotactl(sbi->ll_md_exp, oqctl);
1231                                 }
1232                                 OBD_FREE_PTR(oqctl);
1233                                 GOTO(out_quotactl, rc);
1234                         } else {
1235                                 QCTL_COPY(qctl, oqctl);
1236                                 OBD_FREE_PTR(oqctl);
1237                         }
1238                 }
1239
1240                 if (cfs_copy_to_user((void *)arg, qctl, sizeof(*qctl)))
1241                         rc = -EFAULT;
1242
1243         out_quotactl:
1244                 OBD_FREE_PTR(qctl);
1245                 RETURN(rc);
1246         }
1247         case OBD_IOC_GETNAME: {
1248                 struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
1249                 if (!obd)
1250                         RETURN(-EFAULT);
1251                 if (cfs_copy_to_user((void *)arg, obd->obd_name,
1252                                      strlen(obd->obd_name) + 1))
1253                         RETURN (-EFAULT);
1254                 RETURN(0);
1255         }
1256         case LL_IOC_FLUSHCTX:
1257                 RETURN(ll_flush_ctx(inode));
1258 #ifdef CONFIG_FS_POSIX_ACL
1259         case LL_IOC_RMTACL: {
1260             if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
1261                 inode == inode->i_sb->s_root->d_inode) {
1262                 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1263
1264                 LASSERT(fd != NULL);
1265                 rc = rct_add(&sbi->ll_rct, cfs_curproc_pid(), arg);
1266                 if (!rc)
1267                         fd->fd_flags |= LL_FILE_RMTACL;
1268                 RETURN(rc);
1269             } else
1270                 RETURN(0);
1271         }
1272 #endif
1273         case LL_IOC_GETOBDCOUNT: {
1274                 int count;
1275
1276                 if (cfs_copy_from_user(&count, (int *)arg, sizeof(int)))
1277                         RETURN(-EFAULT);
1278
1279                 if (!count) {
1280                         /* get ost count */
1281                         struct lov_obd *lov = &sbi->ll_dt_exp->exp_obd->u.lov;
1282                         count = lov->desc.ld_tgt_count;
1283                 } else {
1284                         /* get mdt count */
1285                         struct lmv_obd *lmv = &sbi->ll_md_exp->exp_obd->u.lmv;
1286                         count = lmv->desc.ld_tgt_count;
1287                 }
1288
1289                 if (cfs_copy_to_user((int *)arg, &count, sizeof(int)))
1290                         RETURN(-EFAULT);
1291
1292                 RETURN(0);
1293         }
1294         case LL_IOC_PATH2FID:
1295                 if (cfs_copy_to_user((void *)arg, ll_inode2fid(inode),
1296                                      sizeof(struct lu_fid)))
1297                         RETURN(-EFAULT);
1298                 RETURN(0);
1299         case LL_IOC_GET_CONNECT_FLAGS: {
1300                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, (void*)arg));
1301         }
1302         case OBD_IOC_CHANGELOG_SEND:
1303         case OBD_IOC_CHANGELOG_CLEAR:
1304                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1305                                     sizeof(struct ioc_changelog));
1306                 RETURN(rc);
1307         case OBD_IOC_FID2PATH:
1308                 RETURN(ll_fid2path(ll_i2mdexp(inode), (void *)arg));
1309         case LL_IOC_HSM_CT_START:
1310                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void *)arg,
1311                                     sizeof(struct lustre_kernelcomm));
1312                 RETURN(rc);
1313
1314         default:
1315                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
1316         }
1317 }
1318
1319 int ll_dir_open(struct inode *inode, struct file *file)
1320 {
1321         ENTRY;
1322         RETURN(ll_file_open(inode, file));
1323 }
1324
1325 int ll_dir_release(struct inode *inode, struct file *file)
1326 {
1327         ENTRY;
1328         RETURN(ll_file_release(inode, file));
1329 }
1330
1331 struct file_operations ll_dir_operations = {
1332         .open     = ll_dir_open,
1333         .release  = ll_dir_release,
1334         .read     = generic_read_dir,
1335         .readdir  = ll_readdir,
1336         .ioctl    = ll_dir_ioctl
1337 };