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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/dir.c
  33  *
  34  * Directory code for lustre client.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/pagemap.h>
  39 #include <linux/mm.h>
  40 #include <linux/version.h>
  41 #include <linux/user_namespace.h>
  42 #ifdef HAVE_UIDGID_HEADER
  43 # include <linux/uidgid.h>
  44 #endif
  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 <obd_support.h>
  52 #include <obd_class.h>
  53 #include <uapi/linux/lustre/lustre_ioctl.h>
  54 #include <lustre_lib.h>
  55 #include <lustre_dlm.h>
  56 #include <lustre_fid.h>
  57 #include <lustre_kernelcomm.h>
  58 #include <lustre_swab.h>
  59
  60 #include "llite_internal.h"
  61
  62 /*
  63  * (new) readdir implementation overview.
  64  *
  65  * Original lustre readdir implementation cached exact copy of raw directory
  66  * pages on the client. These pages were indexed in client page cache by
  67  * logical offset in the directory file. This design, while very simple and
  68  * intuitive had some inherent problems:
  69  *
  70  *     . it implies that byte offset to the directory entry serves as a
  71  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  72  *     ext3/htree directory entries may move due to splits, and more
  73  *     importantly,
  74  *
  75  *     . it is incompatible with the design of split directories for cmd3,
  76  *     that assumes that names are distributed across nodes based on their
  77  *     hash, and so readdir should be done in hash order.
  78  *
  79  * New readdir implementation does readdir in hash order, and uses hash of a
  80  * file name as a telldir/seekdir cookie. This led to number of complications:
  81  *
  82  *     . hash is not unique, so it cannot be used to index cached directory
  83  *     pages on the client (note, that it requires a whole pageful of hash
  84  *     collided entries to cause two pages to have identical hashes);
  85  *
  86  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  87  *     entry cookie. ext3/htree has the same problem and lustre implementation
  88  *     mimics their solution: seekdir(hash) positions directory at the first
  89  *     entry with the given hash.
  90  *
  91  * Client side.
  92  *
  93  * 0. caching
  94  *
  95  * Client caches directory pages using hash of the first entry as an index. As
  96  * noted above hash is not unique, so this solution doesn't work as is:
  97  * special processing is needed for "page hash chains" (i.e., sequences of
  98  * pages filled with entries all having the same hash value).
  99  *
 100  * First, such chains have to be detected. To this end, server returns to the
 101  * client the hash of the first entry on the page next to one returned. When
 102  * client detects that this hash is the same as hash of the first entry on the
 103  * returned page, page hash collision has to be handled. Pages in the
 104  * hash chain, except first one, are termed "overflow pages".
 105  *
 106  * Solution to index uniqueness problem is to not cache overflow
 107  * pages. Instead, when page hash collision is detected, all overflow pages
 108  * from emerging chain are immediately requested from the server and placed in
 109  * a special data structure (struct ll_dir_chain). This data structure is used
 110  * by ll_readdir() to process entries from overflow pages. When readdir
 111  * invocation finishes, overflow pages are discarded. If page hash collision
 112  * chain weren't completely processed, next call to readdir will again detect
 113  * page hash collision, again read overflow pages in, process next portion of
 114  * entries and again discard the pages. This is not as wasteful as it looks,
 115  * because, given reasonable hash, page hash collisions are extremely rare.
 116  *
 117  * 1. directory positioning
 118  *
 119  * When seekdir(hash) is called, original
 120  *
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  *
 128  * Server.
 129  *
 130  * identification of and access to overflow pages
 131  *
 132  * page format
 133  *
 134  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 135  * a header lu_dirpage which describes the start/end hash, and whether this
 136  * page is empty (contains no dir entry) or hash collide with next page.
 137  * After client receives reply, several pages will be integrated into dir page
 138  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 139  * lu_dirpage for this integrated page will be adjusted. See
 140  * mdc_adjust_dirpages().
 141  *
 142  */
 143 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 144                              __u64 offset, struct ll_dir_chain *chain)
 145 {
 146         struct md_callback      cb_op;
 147         struct page             *page;
 148         int                     rc;
 149
 150         cb_op.md_blocking_ast = ll_md_blocking_ast;
 151         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 152         if (rc != 0)
 153                 return ERR_PTR(rc);
 154
 155         return page;
 156 }
 157
 158 void ll_release_page(struct inode *inode, struct page *page,
 159                      bool remove)
 160 {
 161         kunmap(page);
 162
 163         /* Always remove the page for striped dir, because the page is
 164          * built from temporarily in LMV layer */
 165         if (inode != NULL && S_ISDIR(inode->i_mode) &&
 166             ll_i2info(inode)->lli_lsm_md != NULL) {
 167                 __free_page(page);
 168                 return;
 169         }
 170
 171         if (remove) {
 172                 lock_page(page);
 173                 if (likely(page->mapping != NULL))
 174                         truncate_complete_page(page->mapping, page);
 175                 unlock_page(page);
 176         }
 177         put_page(page);
 178 }
 179
 180 /**
 181  * return IF_* type for given lu_dirent entry.
 182  * IF_* flag shld be converted to particular OS file type in
 183  * platform llite module.
 184  */
 185 static u16 ll_dirent_type_get(struct lu_dirent *ent)
 186 {
 187         u16 type = 0;
 188         struct luda_type *lt;
 189         int len = 0;
 190
 191         if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
 192                 const unsigned align = sizeof(struct luda_type) - 1;
 193
 194                 len = le16_to_cpu(ent->lde_namelen);
 195                 len = (len + align) & ~align;
 196                 lt = (void *)ent->lde_name + len;
 197                 type = IFTODT(le16_to_cpu(lt->lt_type));
 198         }
 199
 200         return type;
 201 }
 202
 203 #ifdef HAVE_DIR_CONTEXT
 204 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 205                 struct dir_context *ctx)
 206 {
 207 #else
 208 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 209                 void *cookie, filldir_t filldir)
 210 {
 211 #endif
 212         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 213         __u64                 pos        = *ppos;
 214         bool                  is_api32 = ll_need_32bit_api(sbi);
 215         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 216         struct page          *page;
 217         struct ll_dir_chain   chain;
 218         bool                  done = false;
 219         int                   rc = 0;
 220         ENTRY;
 221
 222         ll_dir_chain_init(&chain);
 223
 224         page = ll_get_dir_page(inode, op_data, pos, &chain);
 225
 226         while (rc == 0 && !done) {
 227                 struct lu_dirpage *dp;
 228                 struct lu_dirent  *ent;
 229                 __u64 hash;
 230                 __u64 next;
 231
 232                 if (IS_ERR(page)) {
 233                         rc = PTR_ERR(page);
 234                         break;
 235                 }
 236
 237                 hash = MDS_DIR_END_OFF;
 238                 dp = page_address(page);
 239                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 240                      ent = lu_dirent_next(ent)) {
 241                         __u16          type;
 242                         int            namelen;
 243                         struct lu_fid  fid;
 244                         __u64          lhash;
 245                         __u64          ino;
 246
 247                         hash = le64_to_cpu(ent->lde_hash);
 248                         if (hash < pos) /* Skip until we find target hash */
 249                                 continue;
 250
 251                         namelen = le16_to_cpu(ent->lde_namelen);
 252                         if (namelen == 0) /* Skip dummy record */
 253                                 continue;
 254
 255                         if (is_api32 && is_hash64)
 256                                 lhash = hash >> 32;
 257                         else
 258                                 lhash = hash;
 259                         fid_le_to_cpu(&fid, &ent->lde_fid);
 260                         ino = cl_fid_build_ino(&fid, is_api32);
 261                         type = ll_dirent_type_get(ent);
 262                         /* For ll_nfs_get_name_filldir(), it will try to access
 263                          * 'ent' through 'lde_name', so the parameter 'name'
 264                          * for 'filldir()' must be part of the 'ent'. */
 265 #ifdef HAVE_DIR_CONTEXT
 266                         ctx->pos = lhash;
 267                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 268                                          type);
 269 #else
 270                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 271                                        ino, type);
 272 #endif
 273                 }
 274
 275                 if (done) {
 276                         pos = hash;
 277                         ll_release_page(inode, page, false);
 278                         break;
 279                 }
 280
 281                 next = le64_to_cpu(dp->ldp_hash_end);
 282                 pos = next;
 283                 if (pos == MDS_DIR_END_OFF) {
 284                         /*
 285                          * End of directory reached.
 286                          */
 287                         done = 1;
 288                         ll_release_page(inode, page, false);
 289                 } else {
 290                         /*
 291                          * Normal case: continue to the next
 292                          * page.
 293                          */
 294                         ll_release_page(inode, page,
 295                                         le32_to_cpu(dp->ldp_flags) &
 296                                         LDF_COLLIDE);
 297                         next = pos;
 298                         page = ll_get_dir_page(inode, op_data, pos,
 299                                                &chain);
 300                 }
 301         }
 302 #ifdef HAVE_DIR_CONTEXT
 303         ctx->pos = pos;
 304 #else
 305         *ppos = pos;
 306 #endif
 307         ll_dir_chain_fini(&chain);
 308         RETURN(rc);
 309 }
 310
 311 #ifdef HAVE_DIR_CONTEXT
 312 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 313 #else
 314 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 315 #endif
 316 {
 317         struct inode            *inode  = file_inode(filp);
 318         struct ll_file_data     *lfd    = LUSTRE_FPRIVATE(filp);
 319         struct ll_sb_info       *sbi    = ll_i2sbi(inode);
 320         int                     hash64  = sbi->ll_flags & LL_SBI_64BIT_HASH;
 321         int                     api32   = ll_need_32bit_api(sbi);
 322         struct md_op_data       *op_data;
 323         __u64                   pos;
 324         int                     rc;
 325         ENTRY;
 326
 327         if (lfd != NULL)
 328                 pos = lfd->lfd_pos;
 329         else
 330                 pos = 0;
 331
 332         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) pos/size"
 333                "%lu/%llu 32bit_api %d\n", PFID(ll_inode2fid(inode)),
 334                inode, (unsigned long)pos, i_size_read(inode), api32);
 335
 336         if (pos == MDS_DIR_END_OFF)
 337                 /*
 338                  * end-of-file.
 339                  */
 340                 GOTO(out, rc = 0);
 341
 342         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 343                                      LUSTRE_OPC_ANY, inode);
 344         if (IS_ERR(op_data))
 345                 GOTO(out, rc = PTR_ERR(op_data));
 346
 347         if (unlikely(op_data->op_mea1 != NULL)) {
 348                 /* This is only needed for striped dir to fill ..,
 349                  * see lmv_read_entry */
 350                 if (file_dentry(filp)->d_parent != NULL &&
 351                     file_dentry(filp)->d_parent->d_inode != NULL) {
 352                         __u64 ibits = MDS_INODELOCK_UPDATE;
 353                         struct inode *parent =
 354                                 file_dentry(filp)->d_parent->d_inode;
 355
 356                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 357                                 op_data->op_fid3 = *ll_inode2fid(parent);
 358                 }
 359
 360                 /* If it can not find in cache, do lookup .. on the master
 361                  * object */
 362                 if (fid_is_zero(&op_data->op_fid3)) {
 363                         rc = ll_dir_get_parent_fid(inode, &op_data->op_fid3);
 364                         if (rc != 0) {
 365                                 ll_finish_md_op_data(op_data);
 366                                 RETURN(rc);
 367                         }
 368                 }
 369         }
 370 #ifdef HAVE_DIR_CONTEXT
 371         ctx->pos = pos;
 372         rc = ll_dir_read(inode, &pos, op_data, ctx);
 373         pos = ctx->pos;
 374 #else
 375         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 376 #endif
 377         if (lfd != NULL)
 378                 lfd->lfd_pos = pos;
 379
 380         if (pos == MDS_DIR_END_OFF) {
 381                 if (api32)
 382                         pos = LL_DIR_END_OFF_32BIT;
 383                 else
 384                         pos = LL_DIR_END_OFF;
 385         } else {
 386                 if (api32 && hash64)
 387                         pos = pos >> 32;
 388         }
 389 #ifdef HAVE_DIR_CONTEXT
 390         ctx->pos = pos;
 391 #else
 392         filp->f_pos = pos;
 393 #endif
 394         ll_finish_md_op_data(op_data);
 395         filp->f_version = inode->i_version;
 396
 397 out:
 398         if (!rc)
 399                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 400
 401         RETURN(rc);
 402 }
 403
 404 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 405 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 406 {
 407         struct mgs_send_param *msp;
 408         int rc = 0;
 409
 410         OBD_ALLOC_PTR(msp);
 411         if (!msp)
 412                 return -ENOMEM;
 413
 414         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 415         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 416                                 sizeof(struct mgs_send_param), msp, NULL);
 417         if (rc)
 418                 CERROR("Failed to set parameter: %d\n", rc);
 419         OBD_FREE_PTR(msp);
 420
 421         return rc;
 422 }
 423 #endif
 424
 425 /**
 426  * Create striped directory with specified stripe(@lump)
 427  *
 428  * \param[in] dparent   the parent of the directory.
 429  * \param[in] lump      the specified stripes.
 430  * \param[in] dirname   the name of the directory.
 431  * \param[in] mode      the specified mode of the directory.
 432  *
 433  * \retval              =0 if striped directory is being created successfully.
 434  *                      <0 if the creation is failed.
 435  */
 436 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 437                                size_t len, const char *dirname, umode_t mode)
 438 {
 439         struct inode *parent = dparent->d_inode;
 440         struct ptlrpc_request *request = NULL;
 441         struct md_op_data *op_data;
 442         struct ll_sb_info *sbi = ll_i2sbi(parent);
 443         struct inode *inode = NULL;
 444         struct dentry dentry = {
 445                 .d_parent = dparent,
 446                 .d_name = {
 447                         .name = dirname,
 448                         .len = strlen(dirname),
 449                         .hash = ll_full_name_hash(dparent, dirname,
 450                                                   strlen(dirname)),
 451                 },
 452         };
 453         int err;
 454         ENTRY;
 455
 456         if (unlikely(lump->lum_magic != LMV_USER_MAGIC &&
 457                      lump->lum_magic != LMV_USER_MAGIC_SPECIFIC))
 458                 RETURN(-EINVAL);
 459
 460         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) name %s "
 461                "stripe_offset %d, stripe_count: %u\n",
 462                PFID(ll_inode2fid(parent)), parent, dirname,
 463                (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 464
 465         if (lump->lum_stripe_count > 1 &&
 466             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 467                 RETURN(-EINVAL);
 468
 469         if (IS_DEADDIR(parent) &&
 470             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 471                 RETURN(-ENOENT);
 472
 473         if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC) &&
 474             lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC_SPECIFIC))
 475                 lustre_swab_lmv_user_md(lump);
 476
 477         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 478                 mode &= ~current_umask();
 479         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 480         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 481                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 482                                      lump);
 483         if (IS_ERR(op_data))
 484                 RETURN(PTR_ERR(op_data));
 485
 486         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 487                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 488                  * to determine the security context for the file. So our fake
 489                  * dentry should be real enough for this purpose. */
 490                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 491                                               &op_data->op_file_secctx_name,
 492                                               &op_data->op_file_secctx,
 493                                               &op_data->op_file_secctx_size);
 494                 if (err < 0)
 495                         GOTO(out_op_data, err);
 496         }
 497
 498         op_data->op_cli_flags |= CLI_SET_MEA;
 499         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 500                         from_kuid(&init_user_ns, current_fsuid()),
 501                         from_kgid(&init_user_ns, current_fsgid()),
 502                         cfs_curproc_cap_pack(), 0, &request);
 503         if (err)
 504                 GOTO(out_request, err);
 505
 506         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 507
 508         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 509         if (err)
 510                 GOTO(out_inode, err);
 511
 512         dentry.d_inode = inode;
 513
 514         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 515                 inode_lock(inode);
 516                 err = security_inode_notifysecctx(inode,
 517                                                   op_data->op_file_secctx,
 518                                                   op_data->op_file_secctx_size);
 519                 inode_unlock(inode);
 520         } else {
 521                 err = ll_inode_init_security(&dentry, inode, parent);
 522         }
 523         if (err)
 524                 GOTO(out_inode, err);
 525
 526 out_inode:
 527         if (inode != NULL)
 528                 iput(inode);
 529 out_request:
 530         ptlrpc_req_finished(request);
 531 out_op_data:
 532         ll_finish_md_op_data(op_data);
 533
 534         return err;
 535 }
 536
 537 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 538                      int set_default)
 539 {
 540         struct ll_sb_info *sbi = ll_i2sbi(inode);
 541         struct md_op_data *op_data;
 542         struct ptlrpc_request *req = NULL;
 543         int rc = 0;
 544 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 545         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 546         struct obd_device *mgc = lsi->lsi_mgc;
 547 #endif
 548         int lum_size;
 549         ENTRY;
 550
 551         if (lump != NULL) {
 552                 /*
 553                  * This is coming from userspace, so should be in
 554                  * local endian.  But the MDS would like it in little
 555                  * endian, so we swab it before we send it.
 556                  */
 557                 switch (lump->lmm_magic) {
 558                 case LOV_USER_MAGIC_V1: {
 559                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 560                                 lustre_swab_lov_user_md_v1(lump);
 561                         lum_size = sizeof(struct lov_user_md_v1);
 562                         break;
 563                 }
 564                 case LOV_USER_MAGIC_V3: {
 565                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 566                                 lustre_swab_lov_user_md_v3(
 567                                         (struct lov_user_md_v3 *)lump);
 568                         lum_size = sizeof(struct lov_user_md_v3);
 569                         break;
 570                 }
 571                 case LOV_USER_MAGIC_COMP_V1: {
 572                         if (lump->lmm_magic !=
 573                             cpu_to_le32(LOV_USER_MAGIC_COMP_V1))
 574                                 lustre_swab_lov_comp_md_v1(
 575                                         (struct lov_comp_md_v1 *)lump);
 576                         lum_size = le32_to_cpu(
 577                                 ((struct lov_comp_md_v1 *)lump)->lcm_size);
 578                         break;
 579                 }
 580                 case LMV_USER_MAGIC: {
 581                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 582                                 lustre_swab_lmv_user_md(
 583                                         (struct lmv_user_md *)lump);
 584                         lum_size = sizeof(struct lmv_user_md);
 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, &req);
 606         ll_finish_md_op_data(op_data);
 607         ptlrpc_req_finished(req);
 608         if (rc)
 609                 RETURN(rc);
 610
 611 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 612         /*
 613          * 2.9 server has stored filesystem default stripe in ROOT xattr,
 614          * and it's stored into system config for backward compatibility.
 615          *
 616          * In the following we use the fact that LOV_USER_MAGIC_V1 and
 617          * LOV_USER_MAGIC_V3 have the same initial fields so we do not
 618          * need the make the distiction between the 2 versions
 619          */
 620         if (set_default && mgc->u.cli.cl_mgc_mgsexp &&
 621             (lump == NULL ||
 622              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V1 ||
 623              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V3)) {
 624                 char *param = NULL;
 625                 char *buf;
 626
 627                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 628                 if (param == NULL)
 629                         GOTO(end, rc = -ENOMEM);
 630
 631                 buf = param;
 632                 /* Get fsname and assume devname to be -MDT0000. */
 633                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 634                 strcat(buf, "-MDT0000.lov");
 635                 buf += strlen(buf);
 636
 637                 /* Set root stripesize */
 638                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripesize=%u",
 639                          lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 640                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 641                 if (rc)
 642                         GOTO(end, rc);
 643
 644                 /* Set root stripecount */
 645                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripecount=%hd",
 646                          lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 647                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 648                 if (rc)
 649                         GOTO(end, rc);
 650
 651                 /* Set root stripeoffset */
 652                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripeoffset=%hd",
 653                          lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 654                                 (typeof(lump->lmm_stripe_offset))(-1));
 655                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 656
 657 end:
 658                 if (param != NULL)
 659                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 660         }
 661 #endif
 662         RETURN(rc);
 663 }
 664
 665 /**
 666  * This function will be used to get default LOV/LMV/Default LMV
 667  * @valid will be used to indicate which stripe it will retrieve
 668  *      OBD_MD_MEA              LMV stripe EA
 669  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 670  *      otherwise               Default LOV EA.
 671  * Each time, it can only retrieve 1 stripe EA
 672  **/
 673 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 674                      struct ptlrpc_request **request, u64 valid)
 675 {
 676         struct ll_sb_info *sbi = ll_i2sbi(inode);
 677         struct mdt_body   *body;
 678         struct lov_mds_md *lmm = NULL;
 679         struct ptlrpc_request *req = NULL;
 680         int rc, lmm_size;
 681         struct md_op_data *op_data;
 682         ENTRY;
 683
 684         rc = ll_get_default_mdsize(sbi, &lmm_size);
 685         if (rc)
 686                 RETURN(rc);
 687
 688         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 689                                      0, lmm_size, LUSTRE_OPC_ANY,
 690                                      NULL);
 691         if (IS_ERR(op_data))
 692                 RETURN(PTR_ERR(op_data));
 693
 694         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 695         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 696         ll_finish_md_op_data(op_data);
 697         if (rc < 0) {
 698                 CDEBUG(D_INFO, "md_getattr failed on inode "
 699                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 700                 GOTO(out, rc);
 701         }
 702
 703         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 704         LASSERT(body != NULL);
 705
 706         lmm_size = body->mbo_eadatasize;
 707
 708         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 709             lmm_size == 0) {
 710                 GOTO(out, rc = -ENODATA);
 711         }
 712
 713         lmm = req_capsule_server_sized_get(&req->rq_pill,
 714                                            &RMF_MDT_MD, lmm_size);
 715         LASSERT(lmm != NULL);
 716
 717         /*
 718          * This is coming from the MDS, so is probably in
 719          * little endian.  We convert it to host endian before
 720          * passing it to userspace.
 721          */
 722         /* We don't swab objects for directories */
 723         switch (le32_to_cpu(lmm->lmm_magic)) {
 724         case LOV_MAGIC_V1:
 725                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 726                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 727                 break;
 728         case LOV_MAGIC_V3:
 729                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 730                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 731                 break;
 732         case LOV_MAGIC_COMP_V1:
 733                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 734                         lustre_swab_lov_comp_md_v1(
 735                                         (struct lov_comp_md_v1 *)lmm);
 736                 break;
 737         case LMV_MAGIC_V1:
 738                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 739                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 740                 break;
 741         case LMV_USER_MAGIC:
 742                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 743                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 744                 break;
 745         default:
 746                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 747                 rc = -EPROTO;
 748         }
 749 out:
 750         *plmm = lmm;
 751         *plmm_size = lmm_size;
 752         *request = req;
 753         return rc;
 754 }
 755
 756 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 757 {
 758         struct md_op_data       *op_data;
 759         int                     rc;
 760         int                     mdt_index;
 761         ENTRY;
 762
 763         OBD_ALLOC_PTR(op_data);
 764         if (op_data == NULL)
 765                 RETURN(-ENOMEM);
 766
 767         op_data->op_flags |= MF_GET_MDT_IDX;
 768         op_data->op_fid1 = *fid;
 769         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 770         mdt_index = op_data->op_mds;
 771         OBD_FREE_PTR(op_data);
 772         if (rc < 0)
 773                 RETURN(rc);
 774
 775         RETURN(mdt_index);
 776 }
 777
 778 /*
 779  *  Get MDT index for the inode.
 780  */
 781 int ll_get_mdt_idx(struct inode *inode)
 782 {
 783         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 784 }
 785
 786 /**
 787  * Generic handler to do any pre-copy work.
 788  *
 789  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 790  * first information for it that real work has started.
 791  *
 792  * Moreover, for a ARCHIVE request, it will sample the file data version and
 793  * store it in \a copy.
 794  *
 795  * \return 0 on success.
 796  */
 797 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 798 {
 799         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 800         struct hsm_progress_kernel       hpk;
 801         int                              rc = 0;
 802         int                              rc2;
 803         ENTRY;
 804
 805         /* Forge a hsm_progress based on data from copy. */
 806         hpk.hpk_fid = copy->hc_hai.hai_fid;
 807         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 808         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 809         hpk.hpk_extent.length = 0;
 810         hpk.hpk_flags = 0;
 811         hpk.hpk_errval = 0;
 812         hpk.hpk_data_version = 0;
 813
 814
 815         /* For archive request, we need to read the current file version. */
 816         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 817                 struct inode    *inode;
 818                 __u64            data_version = 0;
 819
 820                 /* Get inode for this fid */
 821                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 822                 if (IS_ERR(inode)) {
 823                         hpk.hpk_flags |= HP_FLAG_RETRY;
 824                         /* hpk_errval is >= 0 */
 825                         hpk.hpk_errval = -PTR_ERR(inode);
 826                         GOTO(progress, rc = PTR_ERR(inode));
 827                 }
 828
 829                 /* Read current file data version */
 830                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 831                 iput(inode);
 832                 if (rc != 0) {
 833                         CDEBUG(D_HSM, "Could not read file data version of "
 834                                       DFID" (rc = %d). Archive request ("
 835                                       "%#llx) could not be done.\n",
 836                                       PFID(&copy->hc_hai.hai_fid), rc,
 837                                       copy->hc_hai.hai_cookie);
 838                         hpk.hpk_flags |= HP_FLAG_RETRY;
 839                         /* hpk_errval must be >= 0 */
 840                         hpk.hpk_errval = -rc;
 841                         GOTO(progress, rc);
 842                 }
 843
 844                 /* Store in the hsm_copy for later copytool use.
 845                  * Always modified even if no lsm. */
 846                 copy->hc_data_version = data_version;
 847         }
 848
 849 progress:
 850         /* On error, the request should be considered as completed */
 851         if (hpk.hpk_errval > 0)
 852                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 853
 854         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 855                             &hpk, NULL);
 856
 857         /* Return first error */
 858         RETURN(rc != 0 ? rc : rc2);
 859 }
 860
 861 /**
 862  * Generic handler to do any post-copy work.
 863  *
 864  * It will send the last hsm_progress update to coordinator to inform it
 865  * that copy is finished and whether it was successful or not.
 866  *
 867  * Moreover,
 868  * - for ARCHIVE request, it will sample the file data version and compare it
 869  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 870  *   will be considered as failed.
 871  * - for RESTORE request, it will sample the file data version and send it to
 872  *   coordinator which is useful if the file was imported as 'released'.
 873  *
 874  * \return 0 on success.
 875  */
 876 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 877 {
 878         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 879         struct hsm_progress_kernel       hpk;
 880         int                              rc = 0;
 881         int                              rc2;
 882         ENTRY;
 883
 884         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 885         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 886          * initialized if copy_end was called with copy == NULL.
 887          */
 888
 889         /* Forge a hsm_progress based on data from copy. */
 890         hpk.hpk_fid = copy->hc_hai.hai_fid;
 891         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 892         hpk.hpk_extent = copy->hc_hai.hai_extent;
 893         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 894         hpk.hpk_errval = copy->hc_errval;
 895         hpk.hpk_data_version = 0;
 896
 897         /* For archive request, we need to check the file data was not changed.
 898          *
 899          * For restore request, we need to send the file data version, this is
 900          * useful when the file was created using hsm_import.
 901          */
 902         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 903              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 904             (copy->hc_errval == 0)) {
 905                 struct inode    *inode;
 906                 __u64            data_version = 0;
 907
 908                 /* Get lsm for this fid */
 909                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 910                 if (IS_ERR(inode)) {
 911                         hpk.hpk_flags |= HP_FLAG_RETRY;
 912                         /* hpk_errval must be >= 0 */
 913                         hpk.hpk_errval = -PTR_ERR(inode);
 914                         GOTO(progress, rc = PTR_ERR(inode));
 915                 }
 916
 917                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 918                 iput(inode);
 919                 if (rc) {
 920                         CDEBUG(D_HSM, "Could not read file data version. "
 921                                       "Request could not be confirmed.\n");
 922                         if (hpk.hpk_errval == 0)
 923                                 hpk.hpk_errval = -rc;
 924                         GOTO(progress, rc);
 925                 }
 926
 927                 /* Store in the hsm_copy for later copytool use.
 928                  * Always modified even if no lsm. */
 929                 hpk.hpk_data_version = data_version;
 930
 931                 /* File could have been stripped during archiving, so we need
 932                  * to check anyway. */
 933                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 934                     (copy->hc_data_version != data_version)) {
 935                         CDEBUG(D_HSM, "File data version mismatched. "
 936                               "File content was changed during archiving. "
 937                                DFID", start:%#llx current:%#llx\n",
 938                                PFID(&copy->hc_hai.hai_fid),
 939                                copy->hc_data_version, data_version);
 940                         /* File was changed, send error to cdt. Do not ask for
 941                          * retry because if a file is modified frequently,
 942                          * the cdt will loop on retried archive requests.
 943                          * The policy engine will ask for a new archive later
 944                          * when the file will not be modified for some tunable
 945                          * time */
 946                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 947                         rc = -EBUSY;
 948                         /* hpk_errval must be >= 0 */
 949                         hpk.hpk_errval = -rc;
 950                         GOTO(progress, rc);
 951                 }
 952
 953         }
 954
 955 progress:
 956         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 957                             &hpk, NULL);
 958
 959         /* Return first error */
 960         RETURN(rc != 0 ? rc : rc2);
 961 }
 962
 963
 964 static int copy_and_ioctl(int cmd, struct obd_export *exp,
 965                           const void __user *data, size_t size)
 966 {
 967         void *copy;
 968         int rc;
 969
 970         OBD_ALLOC(copy, size);
 971         if (copy == NULL)
 972                 return -ENOMEM;
 973
 974         if (copy_from_user(copy, data, size)) {
 975                 rc = -EFAULT;
 976                 goto out;
 977         }
 978
 979         rc = obd_iocontrol(cmd, exp, size, copy, NULL);
 980 out:
 981         OBD_FREE(copy, size);
 982
 983         return rc;
 984 }
 985
 986 static int check_owner(int type, int id)
 987 {
 988         switch (type) {
 989         case USRQUOTA:
 990                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
 991                         return -EPERM;
 992                 break;
 993         case GRPQUOTA:
 994                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
 995                         return -EPERM;
 996                 break;
 997         case PRJQUOTA:
 998                 break;
 999         }
1000         return 0;
1001 }
1002
1003 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1004 {
1005         int cmd = qctl->qc_cmd;
1006         int type = qctl->qc_type;
1007         int id = qctl->qc_id;
1008         int valid = qctl->qc_valid;
1009         int rc = 0;
1010         ENTRY;
1011
1012         switch (cmd) {
1013         case Q_SETQUOTA:
1014         case Q_SETINFO:
1015                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1016                         RETURN(-EPERM);
1017                 break;
1018         case Q_GETQUOTA:
1019                 if (check_owner(type, id) &&
1020                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1021                         RETURN(-EPERM);
1022                 break;
1023         case Q_GETINFO:
1024                 break;
1025         default:
1026                 CERROR("unsupported quotactl op: %#x\n", cmd);
1027                 RETURN(-ENOTTY);
1028         }
1029
1030         if (valid != QC_GENERAL) {
1031                 if (cmd == Q_GETINFO)
1032                         qctl->qc_cmd = Q_GETOINFO;
1033                 else if (cmd == Q_GETQUOTA)
1034                         qctl->qc_cmd = Q_GETOQUOTA;
1035                 else
1036                         RETURN(-EINVAL);
1037
1038                 switch (valid) {
1039                 case QC_MDTIDX:
1040                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1041                                            sizeof(*qctl), qctl, NULL);
1042                         break;
1043                 case QC_OSTIDX:
1044                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1045                                            sizeof(*qctl), qctl, NULL);
1046                         break;
1047                 case QC_UUID:
1048                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1049                                            sizeof(*qctl), qctl, NULL);
1050                         if (rc == -EAGAIN)
1051                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1052                                                    sbi->ll_dt_exp,
1053                                                    sizeof(*qctl), qctl, NULL);
1054                         break;
1055                 default:
1056                         rc = -EINVAL;
1057                         break;
1058                 }
1059
1060                 if (rc)
1061                         RETURN(rc);
1062
1063                 qctl->qc_cmd = cmd;
1064         } else {
1065                 struct obd_quotactl *oqctl;
1066
1067                 OBD_ALLOC_PTR(oqctl);
1068                 if (oqctl == NULL)
1069                         RETURN(-ENOMEM);
1070
1071                 QCTL_COPY(oqctl, qctl);
1072                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1073                 if (rc) {
1074                         OBD_FREE_PTR(oqctl);
1075                         RETURN(rc);
1076                 }
1077                 /* If QIF_SPACE is not set, client should collect the
1078                  * space usage from OSSs by itself */
1079                 if (cmd == Q_GETQUOTA &&
1080                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1081                     !oqctl->qc_dqblk.dqb_curspace) {
1082                         struct obd_quotactl *oqctl_tmp;
1083
1084                         OBD_ALLOC_PTR(oqctl_tmp);
1085                         if (oqctl_tmp == NULL)
1086                                 GOTO(out, rc = -ENOMEM);
1087
1088                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1089                         oqctl_tmp->qc_id = oqctl->qc_id;
1090                         oqctl_tmp->qc_type = oqctl->qc_type;
1091
1092                         /* collect space usage from OSTs */
1093                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1094                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1095                         if (!rc || rc == -EREMOTEIO) {
1096                                 oqctl->qc_dqblk.dqb_curspace =
1097                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1098                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1099                         }
1100
1101                         /* collect space & inode usage from MDTs */
1102                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1103                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1104                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1105                         if (!rc || rc == -EREMOTEIO) {
1106                                 oqctl->qc_dqblk.dqb_curspace +=
1107                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1108                                 oqctl->qc_dqblk.dqb_curinodes =
1109                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1110                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1111                         } else {
1112                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1113                         }
1114
1115                         OBD_FREE_PTR(oqctl_tmp);
1116                 }
1117 out:
1118                 QCTL_COPY(qctl, oqctl);
1119                 OBD_FREE_PTR(oqctl);
1120         }
1121
1122         RETURN(rc);
1123 }
1124
1125 /* This function tries to get a single name component,
1126  * to send to the server. No actual path traversal involved,
1127  * so we limit to NAME_MAX */
1128 static char *ll_getname(const char __user *filename)
1129 {
1130         int ret = 0, len;
1131         char *tmp;
1132
1133         OBD_ALLOC(tmp, NAME_MAX + 1);
1134
1135         if (!tmp)
1136                 return ERR_PTR(-ENOMEM);
1137
1138         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1139         if (len < 0)
1140                 ret = -ENOENT;
1141         else if (len > NAME_MAX)
1142                 ret = -ENAMETOOLONG;
1143
1144         if (ret) {
1145                 OBD_FREE(tmp, NAME_MAX + 1);
1146                 tmp =  ERR_PTR(ret);
1147         }
1148         return tmp;
1149 }
1150
1151 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1152
1153 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1154 {
1155         struct dentry *dentry = file_dentry(file);
1156         struct inode *inode = file_inode(file);
1157         struct ll_sb_info *sbi = ll_i2sbi(inode);
1158         struct obd_ioctl_data *data;
1159         int rc = 0;
1160         ENTRY;
1161
1162         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1163                PFID(ll_inode2fid(inode)), inode, cmd);
1164
1165         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1166         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1167                 return -ENOTTY;
1168
1169         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1170         switch(cmd) {
1171         case FSFILT_IOC_GETFLAGS:
1172         case FSFILT_IOC_SETFLAGS:
1173                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1174         case FSFILT_IOC_GETVERSION_OLD:
1175         case FSFILT_IOC_GETVERSION:
1176                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1177         /* We need to special case any other ioctls we want to handle,
1178          * to send them to the MDS/OST as appropriate and to properly
1179          * network encode the arg field.
1180         case FSFILT_IOC_SETVERSION_OLD:
1181         case FSFILT_IOC_SETVERSION:
1182         */
1183         case LL_IOC_GET_MDTIDX: {
1184                 int mdtidx;
1185
1186                 mdtidx = ll_get_mdt_idx(inode);
1187                 if (mdtidx < 0)
1188                         RETURN(mdtidx);
1189
1190                 if (put_user((int)mdtidx, (int __user *)arg))
1191                         RETURN(-EFAULT);
1192
1193                 return 0;
1194         }
1195         case IOC_MDC_LOOKUP: {
1196                 int namelen, len = 0;
1197                 char *buf = NULL;
1198                 char *filename;
1199
1200                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1201                 if (rc != 0)
1202                         RETURN(rc);
1203                 data = (void *)buf;
1204
1205                 filename = data->ioc_inlbuf1;
1206                 namelen = strlen(filename);
1207                 if (namelen < 1) {
1208                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1209                         GOTO(out_free, rc = -EINVAL);
1210                 }
1211
1212                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1213                 if (rc < 0) {
1214                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1215                                ll_get_fsname(inode->i_sb, NULL, 0), namelen,
1216                                filename, rc);
1217                         GOTO(out_free, rc);
1218                 }
1219 out_free:
1220                 OBD_FREE_LARGE(buf, len);
1221                 return rc;
1222         }
1223         case LL_IOC_LMV_SETSTRIPE: {
1224                 struct lmv_user_md  *lum;
1225                 char            *buf = NULL;
1226                 char            *filename;
1227                 int              namelen = 0;
1228                 int              lumlen = 0;
1229                 umode_t          mode;
1230                 int              len;
1231                 int              rc;
1232
1233                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1234                 if (rc)
1235                         RETURN(rc);
1236
1237                 data = (void *)buf;
1238                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1239                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1240                         GOTO(lmv_out_free, rc = -EINVAL);
1241
1242                 filename = data->ioc_inlbuf1;
1243                 namelen = data->ioc_inllen1;
1244
1245                 if (namelen < 1) {
1246                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1247                         GOTO(lmv_out_free, rc = -EINVAL);
1248                 }
1249                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1250                 lumlen = data->ioc_inllen2;
1251
1252                 if ((lum->lum_magic != LMV_USER_MAGIC &&
1253                      lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) ||
1254                     lumlen < sizeof(*lum)) {
1255                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1256                                filename, lum->lum_magic, lumlen, -EFAULT);
1257                         GOTO(lmv_out_free, rc = -EINVAL);
1258                 }
1259
1260 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1261                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1262 #else
1263                 mode = data->ioc_type;
1264 #endif
1265                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1266 lmv_out_free:
1267                 OBD_FREE_LARGE(buf, len);
1268                 RETURN(rc);
1269
1270         }
1271         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1272                 struct lmv_user_md        lum;
1273                 struct lmv_user_md __user *ulump =
1274                                         (struct lmv_user_md __user *)arg;
1275                 int                       rc;
1276
1277                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1278                         RETURN(-EFAULT);
1279
1280                 if (lum.lum_magic != LMV_USER_MAGIC)
1281                         RETURN(-EINVAL);
1282
1283                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1284
1285                 RETURN(rc);
1286         }
1287         case LL_IOC_LOV_SETSTRIPE_NEW:
1288         case LL_IOC_LOV_SETSTRIPE: {
1289                 struct lov_user_md_v3 lumv3;
1290                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1291                 struct lov_user_md_v1 __user *lumv1p =
1292                         (struct lov_user_md_v1 __user *)arg;
1293                 struct lov_user_md_v3 __user *lumv3p =
1294                         (struct lov_user_md_v3 __user *)arg;
1295
1296                 int set_default = 0;
1297
1298                 CLASSERT(sizeof(struct lov_user_md_v3) >
1299                          sizeof(struct lov_comp_md_v1));
1300                 CLASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1301                 CLASSERT(sizeof(lumv3.lmm_objects[0]) ==
1302                          sizeof(lumv3p->lmm_objects[0]));
1303                 /* first try with v1 which is smaller than v3 */
1304                 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1305                         RETURN(-EFAULT);
1306
1307                 if (lumv1->lmm_magic == LOV_USER_MAGIC_V3)
1308                         if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1309                                 RETURN(-EFAULT);
1310
1311                 if (inode->i_sb->s_root == file_dentry(file))
1312                         set_default = 1;
1313
1314                 /* in v1 and v3 cases lumv1 points to data */
1315                 rc = ll_dir_setstripe(inode, lumv1, set_default);
1316
1317                 RETURN(rc);
1318         }
1319         case LL_IOC_LMV_GETSTRIPE: {
1320                 struct lmv_user_md __user *ulmv =
1321                                         (struct lmv_user_md __user *)arg;
1322                 struct lmv_user_md      lum;
1323                 struct ptlrpc_request   *request = NULL;
1324                 union lmv_mds_md        *lmm = NULL;
1325                 int                     lmmsize;
1326                 u64                     valid = 0;
1327                 struct lmv_user_md      *tmp = NULL;
1328                 int                     mdt_index;
1329                 int                     lum_size;
1330                 int                     stripe_count;
1331                 int                     max_stripe_count;
1332                 int                     i;
1333                 int                     rc;
1334
1335                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1336                         RETURN(-EFAULT);
1337
1338                 max_stripe_count = lum.lum_stripe_count;
1339                 /* lum_magic will indicate which stripe the ioctl will like
1340                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1341                  * is for default LMV stripe */
1342                 if (lum.lum_magic == LMV_MAGIC_V1)
1343                         valid |= OBD_MD_MEA;
1344                 else if (lum.lum_magic == LMV_USER_MAGIC)
1345                         valid |= OBD_MD_DEFAULT_MEA;
1346                 else
1347                         RETURN(-EINVAL);
1348
1349                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1350                                       valid);
1351                 if (rc != 0)
1352                         GOTO(finish_req, rc);
1353
1354                 /* Get default LMV EA */
1355                 if (lum.lum_magic == LMV_USER_MAGIC) {
1356                         if (lmmsize > sizeof(*ulmv))
1357                                 GOTO(finish_req, rc = -EINVAL);
1358
1359                         if (copy_to_user(ulmv, lmm, lmmsize))
1360                                 GOTO(finish_req, rc = -EFAULT);
1361
1362                         GOTO(finish_req, rc);
1363                 }
1364
1365                 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1366                 if (max_stripe_count < stripe_count) {
1367                         lum.lum_stripe_count = stripe_count;
1368                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1369                                 GOTO(finish_req, rc = -EFAULT);
1370                         GOTO(finish_req, rc = -E2BIG);
1371                 }
1372
1373                 lum_size = lmv_user_md_size(stripe_count, LMV_MAGIC_V1);
1374                 OBD_ALLOC(tmp, lum_size);
1375                 if (tmp == NULL)
1376                         GOTO(finish_req, rc = -ENOMEM);
1377
1378                 mdt_index = ll_get_mdt_idx(inode);
1379                 if (mdt_index < 0)
1380                         GOTO(out_tmp, rc = -ENOMEM);
1381
1382                 tmp->lum_magic = LMV_MAGIC_V1;
1383                 tmp->lum_stripe_count = 0;
1384                 tmp->lum_stripe_offset = mdt_index;
1385                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1386                 for (i = 0; i < stripe_count; i++) {
1387                         struct lu_fid   fid;
1388
1389                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1390                         mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1391                         if (mdt_index < 0)
1392                                 GOTO(out_tmp, rc = mdt_index);
1393
1394                         tmp->lum_objects[i].lum_mds = mdt_index;
1395                         tmp->lum_objects[i].lum_fid = fid;
1396                         tmp->lum_stripe_count++;
1397                 }
1398
1399                 if (copy_to_user(ulmv, tmp, lum_size))
1400                         GOTO(out_tmp, rc = -EFAULT);
1401 out_tmp:
1402                 OBD_FREE(tmp, lum_size);
1403 finish_req:
1404                 ptlrpc_req_finished(request);
1405                 return rc;
1406         }
1407
1408         case LL_IOC_REMOVE_ENTRY: {
1409                 char            *filename = NULL;
1410                 int              namelen = 0;
1411                 int              rc;
1412
1413                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1414                  * unsupported server, which might crash the server(LU-2730),
1415                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1416                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1417                  * server will support REINT_RMENTRY XXX*/
1418                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1419                         RETURN(-ENOTSUPP);
1420
1421                 filename = ll_getname((const char __user *)arg);
1422                 if (IS_ERR(filename))
1423                         RETURN(PTR_ERR(filename));
1424
1425                 namelen = strlen(filename);
1426                 if (namelen < 1)
1427                         GOTO(out_rmdir, rc = -EINVAL);
1428
1429                 rc = ll_rmdir_entry(inode, filename, namelen);
1430 out_rmdir:
1431                 if (filename)
1432                         ll_putname(filename);
1433                 RETURN(rc);
1434         }
1435         case LL_IOC_LOV_SWAP_LAYOUTS:
1436                 RETURN(-EPERM);
1437         case IOC_OBD_STATFS:
1438                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1439         case LL_IOC_LOV_GETSTRIPE:
1440         case LL_IOC_LOV_GETSTRIPE_NEW:
1441         case LL_IOC_MDC_GETINFO:
1442         case IOC_MDC_GETFILEINFO:
1443         case IOC_MDC_GETFILESTRIPE: {
1444                 struct ptlrpc_request *request = NULL;
1445                 struct lov_user_md __user *lump;
1446                 struct lov_mds_md *lmm = NULL;
1447                 struct mdt_body *body;
1448                 char *filename = NULL;
1449                 int lmmsize;
1450
1451                 if (cmd == IOC_MDC_GETFILEINFO ||
1452                     cmd == IOC_MDC_GETFILESTRIPE) {
1453                         filename = ll_getname((const char __user *)arg);
1454                         if (IS_ERR(filename))
1455                                 RETURN(PTR_ERR(filename));
1456
1457                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1458                                                       &lmmsize, &request);
1459                 } else {
1460                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1461                                               &request, 0);
1462                 }
1463
1464                 if (request) {
1465                         body = req_capsule_server_get(&request->rq_pill,
1466                                                       &RMF_MDT_BODY);
1467                         LASSERT(body != NULL);
1468                 } else {
1469                         GOTO(out_req, rc);
1470                 }
1471
1472                 if (rc < 0) {
1473                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1474                                                cmd == LL_IOC_MDC_GETINFO))
1475                                 GOTO(skip_lmm, rc = 0);
1476                         else
1477                                 GOTO(out_req, rc);
1478                 }
1479
1480                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1481                     cmd == LL_IOC_LOV_GETSTRIPE ||
1482                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1483                         lump = (struct lov_user_md __user *)arg;
1484                 } else {
1485                         struct lov_user_mds_data __user *lmdp;
1486                         lmdp = (struct lov_user_mds_data __user *)arg;
1487                         lump = &lmdp->lmd_lmm;
1488                 }
1489                 if (copy_to_user(lump, lmm, lmmsize)) {
1490                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1491                                 GOTO(out_req, rc = -EFAULT);
1492                         rc = -EOVERFLOW;
1493                 }
1494         skip_lmm:
1495                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1496                         struct lov_user_mds_data __user *lmdp;
1497                         lstat_t st = { 0 };
1498
1499                         st.st_dev       = inode->i_sb->s_dev;
1500                         st.st_mode      = body->mbo_mode;
1501                         st.st_nlink     = body->mbo_nlink;
1502                         st.st_uid       = body->mbo_uid;
1503                         st.st_gid       = body->mbo_gid;
1504                         st.st_rdev      = body->mbo_rdev;
1505                         st.st_size      = body->mbo_size;
1506                         st.st_blksize   = PAGE_SIZE;
1507                         st.st_blocks    = body->mbo_blocks;
1508                         st.st_atime     = body->mbo_atime;
1509                         st.st_mtime     = body->mbo_mtime;
1510                         st.st_ctime     = body->mbo_ctime;
1511                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1512                                                 sbi->ll_flags &
1513                                                 LL_SBI_32BIT_API);
1514
1515                         lmdp = (struct lov_user_mds_data __user *)arg;
1516                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1517                                 GOTO(out_req, rc = -EFAULT);
1518                 }
1519
1520                 EXIT;
1521         out_req:
1522                 ptlrpc_req_finished(request);
1523                 if (filename)
1524                         ll_putname(filename);
1525                 return rc;
1526         }
1527         case OBD_IOC_QUOTACTL: {
1528                 struct if_quotactl *qctl;
1529
1530                 OBD_ALLOC_PTR(qctl);
1531                 if (!qctl)
1532                         RETURN(-ENOMEM);
1533
1534                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1535                         GOTO(out_quotactl, rc = -EFAULT);
1536
1537                 rc = quotactl_ioctl(sbi, qctl);
1538
1539                 if (rc == 0 &&
1540                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1541                         rc = -EFAULT;
1542
1543         out_quotactl:
1544                 OBD_FREE_PTR(qctl);
1545                 RETURN(rc);
1546         }
1547         case OBD_IOC_GETDTNAME:
1548         case OBD_IOC_GETMDNAME:
1549                 RETURN(ll_get_obd_name(inode, cmd, arg));
1550         case LL_IOC_FLUSHCTX:
1551                 RETURN(ll_flush_ctx(inode));
1552         case LL_IOC_GETOBDCOUNT: {
1553                 u32 count, vallen;
1554                 struct obd_export *exp;
1555
1556                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1557                         RETURN(-EFAULT);
1558
1559                 /* get ost count when count is zero, get mdt count otherwise */
1560                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1561                 vallen = sizeof(count);
1562                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1563                                   KEY_TGT_COUNT, &vallen, &count);
1564                 if (rc) {
1565                         CERROR("get target count failed: %d\n", rc);
1566                         RETURN(rc);
1567                 }
1568
1569                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1570                         RETURN(-EFAULT);
1571
1572                 RETURN(0);
1573         }
1574         case LL_IOC_PATH2FID:
1575                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1576                                      sizeof(struct lu_fid)))
1577                         RETURN(-EFAULT);
1578                 RETURN(0);
1579         case LL_IOC_GET_CONNECT_FLAGS: {
1580                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1581                                      (void __user *)arg));
1582         }
1583         case OBD_IOC_FID2PATH:
1584                 RETURN(ll_fid2path(inode, (void __user *)arg));
1585         case LL_IOC_GETPARENT:
1586                 RETURN(ll_getparent(file, (void __user *)arg));
1587         case LL_IOC_FID2MDTIDX: {
1588                 struct obd_export *exp = ll_i2mdexp(inode);
1589                 struct lu_fid     fid;
1590                 __u32             index;
1591
1592                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1593                                    sizeof(fid)))
1594                         RETURN(-EFAULT);
1595
1596                 /* Call mdc_iocontrol */
1597                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1598                                    (__u32 __user *)&index);
1599                 if (rc != 0)
1600                         RETURN(rc);
1601
1602                 RETURN(index);
1603         }
1604         case LL_IOC_HSM_REQUEST: {
1605                 struct hsm_user_request *hur;
1606                 ssize_t                  totalsize;
1607
1608                 OBD_ALLOC_PTR(hur);
1609                 if (hur == NULL)
1610                         RETURN(-ENOMEM);
1611
1612                 /* We don't know the true size yet; copy the fixed-size part */
1613                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1614                         OBD_FREE_PTR(hur);
1615                         RETURN(-EFAULT);
1616                 }
1617
1618                 /* Compute the whole struct size */
1619                 totalsize = hur_len(hur);
1620                 OBD_FREE_PTR(hur);
1621                 if (totalsize < 0)
1622                         RETURN(-E2BIG);
1623
1624                 /* Final size will be more than double totalsize */
1625                 if (totalsize >= MDS_MAXREQSIZE / 3)
1626                         RETURN(-E2BIG);
1627
1628                 OBD_ALLOC_LARGE(hur, totalsize);
1629                 if (hur == NULL)
1630                         RETURN(-ENOMEM);
1631
1632                 /* Copy the whole struct */
1633                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1634                         GOTO(out_hur, rc = -EFAULT);
1635
1636                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1637                         const struct lu_fid *fid;
1638                         struct inode *f;
1639                         int i;
1640
1641                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1642                                 fid = &hur->hur_user_item[i].hui_fid;
1643                                 f = search_inode_for_lustre(inode->i_sb, fid);
1644                                 if (IS_ERR(f)) {
1645                                         rc = PTR_ERR(f);
1646                                         break;
1647                                 }
1648
1649                                 rc = ll_hsm_release(f);
1650                                 iput(f);
1651                                 if (rc != 0)
1652                                         break;
1653                         }
1654                 } else {
1655                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1656                                            hur, NULL);
1657                 }
1658
1659 out_hur:
1660                 OBD_FREE_LARGE(hur, totalsize);
1661
1662                 RETURN(rc);
1663         }
1664         case LL_IOC_HSM_PROGRESS: {
1665                 struct hsm_progress_kernel      hpk;
1666                 struct hsm_progress             hp;
1667
1668                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1669                         RETURN(-EFAULT);
1670
1671                 hpk.hpk_fid = hp.hp_fid;
1672                 hpk.hpk_cookie = hp.hp_cookie;
1673                 hpk.hpk_extent = hp.hp_extent;
1674                 hpk.hpk_flags = hp.hp_flags;
1675                 hpk.hpk_errval = hp.hp_errval;
1676                 hpk.hpk_data_version = 0;
1677
1678                 /* File may not exist in Lustre; all progress
1679                  * reported to Lustre root */
1680                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1681                                    NULL);
1682                 RETURN(rc);
1683         }
1684         case LL_IOC_HSM_CT_START:
1685                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1686                         RETURN(-EPERM);
1687
1688                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1689                                     sizeof(struct lustre_kernelcomm));
1690                 RETURN(rc);
1691
1692         case LL_IOC_HSM_COPY_START: {
1693                 struct hsm_copy *copy;
1694                 int              rc;
1695
1696                 OBD_ALLOC_PTR(copy);
1697                 if (copy == NULL)
1698                         RETURN(-ENOMEM);
1699                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1700                         OBD_FREE_PTR(copy);
1701                         RETURN(-EFAULT);
1702                 }
1703
1704                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1705                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1706                         rc = -EFAULT;
1707
1708                 OBD_FREE_PTR(copy);
1709                 RETURN(rc);
1710         }
1711         case LL_IOC_HSM_COPY_END: {
1712                 struct hsm_copy *copy;
1713                 int              rc;
1714
1715                 OBD_ALLOC_PTR(copy);
1716                 if (copy == NULL)
1717                         RETURN(-ENOMEM);
1718                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1719                         OBD_FREE_PTR(copy);
1720                         RETURN(-EFAULT);
1721                 }
1722
1723                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1724                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1725                         rc = -EFAULT;
1726
1727                 OBD_FREE_PTR(copy);
1728                 RETURN(rc);
1729         }
1730         case LL_IOC_MIGRATE: {
1731                 char            *buf = NULL;
1732                 const char      *filename;
1733                 int             namelen = 0;
1734                 int             len;
1735                 int             rc;
1736                 int             mdtidx;
1737
1738                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1739                 if (rc < 0)
1740                         RETURN(rc);
1741
1742                 data = (struct obd_ioctl_data *)buf;
1743                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1744                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1745                         GOTO(migrate_free, rc = -EINVAL);
1746
1747                 filename = data->ioc_inlbuf1;
1748                 namelen = data->ioc_inllen1;
1749                 /* \0 is packed at the end of filename */
1750                 if (namelen < 1 || namelen != strlen(filename) + 1)
1751                         GOTO(migrate_free, rc = -EINVAL);
1752
1753                 if (data->ioc_inllen2 != sizeof(mdtidx))
1754                         GOTO(migrate_free, rc = -EINVAL);
1755                 mdtidx = *(int *)data->ioc_inlbuf2;
1756
1757                 rc = ll_migrate(inode, file, mdtidx, filename, namelen - 1);
1758 migrate_free:
1759                 OBD_FREE_LARGE(buf, len);
1760
1761                 RETURN(rc);
1762         }
1763         case LL_IOC_FSGETXATTR:
1764                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
1765         case LL_IOC_FSSETXATTR:
1766                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
1767         default:
1768                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1769                                      (void __user *)arg));
1770         }
1771 }
1772
1773 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1774 {
1775         struct inode *inode = file->f_mapping->host;
1776         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1777         struct ll_sb_info *sbi = ll_i2sbi(inode);
1778         int api32 = ll_need_32bit_api(sbi);
1779         loff_t ret = -EINVAL;
1780         ENTRY;
1781
1782         inode_lock(inode);
1783         switch (origin) {
1784                 case SEEK_SET:
1785                         break;
1786                 case SEEK_CUR:
1787                         offset += file->f_pos;
1788                         break;
1789                 case SEEK_END:
1790                         if (offset > 0)
1791                                 GOTO(out, ret);
1792                         if (api32)
1793                                 offset += LL_DIR_END_OFF_32BIT;
1794                         else
1795                                 offset += LL_DIR_END_OFF;
1796                         break;
1797                 default:
1798                         GOTO(out, ret);
1799         }
1800
1801         if (offset >= 0 &&
1802             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1803              (!api32 && offset <= LL_DIR_END_OFF))) {
1804                 if (offset != file->f_pos) {
1805                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1806                             (!api32 && offset == LL_DIR_END_OFF))
1807                                 fd->lfd_pos = MDS_DIR_END_OFF;
1808                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1809                                 fd->lfd_pos = offset << 32;
1810                         else
1811                                 fd->lfd_pos = offset;
1812                         file->f_pos = offset;
1813                         file->f_version = 0;
1814                 }
1815                 ret = offset;
1816         }
1817         GOTO(out, ret);
1818
1819 out:
1820         inode_unlock(inode);
1821         return ret;
1822 }
1823
1824 static int ll_dir_open(struct inode *inode, struct file *file)
1825 {
1826         ENTRY;
1827         RETURN(ll_file_open(inode, file));
1828 }
1829
1830 static int ll_dir_release(struct inode *inode, struct file *file)
1831 {
1832         ENTRY;
1833         RETURN(ll_file_release(inode, file));
1834 }
1835
1836 const struct file_operations ll_dir_operations = {
1837         .llseek         = ll_dir_seek,
1838         .open           = ll_dir_open,
1839         .release        = ll_dir_release,
1840         .read           = generic_read_dir,
1841 #ifdef HAVE_DIR_CONTEXT
1842         .iterate        = ll_iterate,
1843 #else
1844         .readdir        = ll_readdir,
1845 #endif
1846         .unlocked_ioctl = ll_dir_ioctl,
1847         .fsync          = ll_fsync,
1848 };