lustre/llite/dir.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/dir.c
  37  *
  38  * Directory code for lustre client.
  39  */
  40
  41 #include <linux/fs.h>
  42 #include <linux/pagemap.h>
  43 #include <linux/mm.h>
  44 #include <linux/version.h>
  45 #include <linux/user_namespace.h>
  46 #ifdef HAVE_UIDGID_HEADER
  47 # include <linux/uidgid.h>
  48 #endif
  49 #include <asm/uaccess.h>
  50 #include <linux/buffer_head.h>   // for wait_on_buffer
  51 #include <linux/pagevec.h>
  52
  53 #define DEBUG_SUBSYSTEM S_LLITE
  54
  55 #include <lustre/lustre_idl.h>
  56 #include <obd_support.h>
  57 #include <obd_class.h>
  58 #include <lustre_ioctl.h>
  59 #include <lustre_lib.h>
  60 #include <lustre_dlm.h>
  61 #include <lustre_fid.h>
  62 #include <lustre_kernelcomm.h>
  63 #include "llite_internal.h"
  64
  65 /*
  66  * (new) readdir implementation overview.
  67  *
  68  * Original lustre readdir implementation cached exact copy of raw directory
  69  * pages on the client. These pages were indexed in client page cache by
  70  * logical offset in the directory file. This design, while very simple and
  71  * intuitive had some inherent problems:
  72  *
  73  *     . it implies that byte offset to the directory entry serves as a
  74  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  75  *     ext3/htree directory entries may move due to splits, and more
  76  *     importantly,
  77  *
  78  *     . it is incompatible with the design of split directories for cmd3,
  79  *     that assumes that names are distributed across nodes based on their
  80  *     hash, and so readdir should be done in hash order.
  81  *
  82  * New readdir implementation does readdir in hash order, and uses hash of a
  83  * file name as a telldir/seekdir cookie. This led to number of complications:
  84  *
  85  *     . hash is not unique, so it cannot be used to index cached directory
  86  *     pages on the client (note, that it requires a whole pageful of hash
  87  *     collided entries to cause two pages to have identical hashes);
  88  *
  89  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  90  *     entry cookie. ext3/htree has the same problem and lustre implementation
  91  *     mimics their solution: seekdir(hash) positions directory at the first
  92  *     entry with the given hash.
  93  *
  94  * Client side.
  95  *
  96  * 0. caching
  97  *
  98  * Client caches directory pages using hash of the first entry as an index. As
  99  * noted above hash is not unique, so this solution doesn't work as is:
 100  * special processing is needed for "page hash chains" (i.e., sequences of
 101  * pages filled with entries all having the same hash value).
 102  *
 103  * First, such chains have to be detected. To this end, server returns to the
 104  * client the hash of the first entry on the page next to one returned. When
 105  * client detects that this hash is the same as hash of the first entry on the
 106  * returned page, page hash collision has to be handled. Pages in the
 107  * hash chain, except first one, are termed "overflow pages".
 108  *
 109  * Solution to index uniqueness problem is to not cache overflow
 110  * pages. Instead, when page hash collision is detected, all overflow pages
 111  * from emerging chain are immediately requested from the server and placed in
 112  * a special data structure (struct ll_dir_chain). This data structure is used
 113  * by ll_readdir() to process entries from overflow pages. When readdir
 114  * invocation finishes, overflow pages are discarded. If page hash collision
 115  * chain weren't completely processed, next call to readdir will again detect
 116  * page hash collision, again read overflow pages in, process next portion of
 117  * entries and again discard the pages. This is not as wasteful as it looks,
 118  * because, given reasonable hash, page hash collisions are extremely rare.
 119  *
 120  * 1. directory positioning
 121  *
 122  * When seekdir(hash) is called, original
 123  *
 124  *
 125  *
 126  *
 127  *
 128  *
 129  *
 130  *
 131  * Server.
 132  *
 133  * identification of and access to overflow pages
 134  *
 135  * page format
 136  *
 137  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 138  * a header lu_dirpage which describes the start/end hash, and whether this
 139  * page is empty (contains no dir entry) or hash collide with next page.
 140  * After client receives reply, several pages will be integrated into dir page
 141  * in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
 142  * lu_dirpage for this integrated page will be adjusted. See
 143  * mdc_adjust_dirpages().
 144  *
 145  */
 146 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 147                              __u64 offset, struct ll_dir_chain *chain)
 148 {
 149         struct md_callback      cb_op;
 150         struct page             *page;
 151         int                     rc;
 152
 153         cb_op.md_blocking_ast = ll_md_blocking_ast;
 154         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 155         if (rc != 0)
 156                 return ERR_PTR(rc);
 157
 158         return page;
 159 }
 160
 161 void ll_release_page(struct inode *inode, struct page *page,
 162                      bool remove)
 163 {
 164         kunmap(page);
 165
 166         /* Always remove the page for striped dir, because the page is
 167          * built from temporarily in LMV layer */
 168         if (inode != NULL && S_ISDIR(inode->i_mode) &&
 169             ll_i2info(inode)->lli_lsm_md != NULL) {
 170                 __free_page(page);
 171                 return;
 172         }
 173
 174         if (remove) {
 175                 lock_page(page);
 176                 if (likely(page->mapping != NULL))
 177                         truncate_complete_page(page->mapping, page);
 178                 unlock_page(page);
 179         }
 180         page_cache_release(page);
 181 }
 182
 183 /**
 184  * return IF_* type for given lu_dirent entry.
 185  * IF_* flag shld be converted to particular OS file type in
 186  * platform llite module.
 187  */
 188 static u16 ll_dirent_type_get(struct lu_dirent *ent)
 189 {
 190         u16 type = 0;
 191         struct luda_type *lt;
 192         int len = 0;
 193
 194         if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
 195                 const unsigned align = sizeof(struct luda_type) - 1;
 196
 197                 len = le16_to_cpu(ent->lde_namelen);
 198                 len = (len + align) & ~align;
 199                 lt = (void *)ent->lde_name + len;
 200                 type = IFTODT(le16_to_cpu(lt->lt_type));
 201         }
 202
 203         return type;
 204 }
 205
 206 #ifdef HAVE_DIR_CONTEXT
 207 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 208                 struct dir_context *ctx)
 209 {
 210 #else
 211 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 212                 void *cookie, filldir_t filldir)
 213 {
 214 #endif
 215         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 216         __u64                 pos        = *ppos;
 217         bool                  is_api32 = ll_need_32bit_api(sbi);
 218         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 219         struct page          *page;
 220         struct ll_dir_chain   chain;
 221         bool                  done = false;
 222         int                   rc = 0;
 223         ENTRY;
 224
 225         ll_dir_chain_init(&chain);
 226
 227         page = ll_get_dir_page(inode, op_data, pos, &chain);
 228
 229         while (rc == 0 && !done) {
 230                 struct lu_dirpage *dp;
 231                 struct lu_dirent  *ent;
 232                 __u64 hash;
 233                 __u64 next;
 234
 235                 if (IS_ERR(page)) {
 236                         rc = PTR_ERR(page);
 237                         break;
 238                 }
 239
 240                 hash = MDS_DIR_END_OFF;
 241                 dp = page_address(page);
 242                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 243                      ent = lu_dirent_next(ent)) {
 244                         __u16          type;
 245                         int            namelen;
 246                         struct lu_fid  fid;
 247                         __u64          lhash;
 248                         __u64          ino;
 249
 250                         hash = le64_to_cpu(ent->lde_hash);
 251                         if (hash < pos)
 252                                 /*
 253                                  * Skip until we find target hash
 254                                  * value.
 255                                  */
 256                                 continue;
 257
 258                         namelen = le16_to_cpu(ent->lde_namelen);
 259                         if (namelen == 0)
 260                                 /*
 261                                  * Skip dummy record.
 262                                  */
 263                                 continue;
 264
 265                         if (is_api32 && is_hash64)
 266                                 lhash = hash >> 32;
 267                         else
 268                                 lhash = hash;
 269                         fid_le_to_cpu(&fid, &ent->lde_fid);
 270                         ino = cl_fid_build_ino(&fid, is_api32);
 271                         type = ll_dirent_type_get(ent);
 272                         /* For 'll_nfs_get_name_filldir()', it will try
 273                          * to access the 'ent' through its 'lde_name',
 274                          * so the parameter 'name' for 'filldir()' must
 275                          * be part of the 'ent'. */
 276 #ifdef HAVE_DIR_CONTEXT
 277                         ctx->pos = lhash;
 278                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 279                                          type);
 280 #else
 281                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 282                                        ino, type);
 283 #endif
 284                 }
 285
 286                 if (done) {
 287                         pos = hash;
 288                         ll_release_page(inode, page, false);
 289                         break;
 290                 }
 291
 292                 next = le64_to_cpu(dp->ldp_hash_end);
 293                 pos = next;
 294                 if (pos == MDS_DIR_END_OFF) {
 295                         /*
 296                          * End of directory reached.
 297                          */
 298                         done = 1;
 299                         ll_release_page(inode, page, false);
 300                 } else {
 301                         /*
 302                          * Normal case: continue to the next
 303                          * page.
 304                          */
 305                         ll_release_page(inode, page,
 306                                         le32_to_cpu(dp->ldp_flags) &
 307                                         LDF_COLLIDE);
 308                         next = pos;
 309                         page = ll_get_dir_page(inode, op_data, pos,
 310                                                &chain);
 311                 }
 312         }
 313 #ifdef HAVE_DIR_CONTEXT
 314         ctx->pos = pos;
 315 #else
 316         *ppos = pos;
 317 #endif
 318         ll_dir_chain_fini(&chain);
 319         RETURN(rc);
 320 }
 321
 322 #ifdef HAVE_DIR_CONTEXT
 323 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 324 #else
 325 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 326 #endif
 327 {
 328         struct inode            *inode  = filp->f_dentry->d_inode;
 329         struct ll_file_data     *lfd    = LUSTRE_FPRIVATE(filp);
 330         struct ll_sb_info       *sbi    = ll_i2sbi(inode);
 331         int                     hash64  = sbi->ll_flags & LL_SBI_64BIT_HASH;
 332         int                     api32   = ll_need_32bit_api(sbi);
 333         struct md_op_data       *op_data;
 334         __u64                   pos;
 335         int                     rc;
 336         ENTRY;
 337
 338         if (lfd != NULL)
 339                 pos = lfd->lfd_pos;
 340         else
 341                 pos = 0;
 342
 343         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) pos/size"
 344                "%lu/%llu 32bit_api %d\n", PFID(ll_inode2fid(inode)),
 345                inode, (unsigned long)pos, i_size_read(inode), api32);
 346
 347         if (pos == MDS_DIR_END_OFF)
 348                 /*
 349                  * end-of-file.
 350                  */
 351                 GOTO(out, rc = 0);
 352
 353         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 354                                      LUSTRE_OPC_ANY, inode);
 355         if (IS_ERR(op_data))
 356                 GOTO(out, rc = PTR_ERR(op_data));
 357
 358         if (unlikely(op_data->op_mea1 != NULL)) {
 359                 /* This is only needed for striped dir to fill ..,
 360                  * see lmv_read_entry */
 361                 if (filp->f_dentry->d_parent != NULL &&
 362                     filp->f_dentry->d_parent->d_inode != NULL) {
 363                         __u64 ibits = MDS_INODELOCK_UPDATE;
 364                         struct inode *parent =
 365                                 filp->f_dentry->d_parent->d_inode;
 366
 367                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 368                                 op_data->op_fid3 = *ll_inode2fid(parent);
 369                 }
 370
 371                 /* If it can not find in cache, do lookup .. on the master
 372                  * object */
 373                 if (fid_is_zero(&op_data->op_fid3)) {
 374                         rc = ll_dir_get_parent_fid(inode, &op_data->op_fid3);
 375                         if (rc != 0) {
 376                                 ll_finish_md_op_data(op_data);
 377                                 RETURN(rc);
 378                         }
 379                 }
 380         }
 381         op_data->op_max_pages = sbi->ll_md_brw_pages;
 382 #ifdef HAVE_DIR_CONTEXT
 383         ctx->pos = pos;
 384         rc = ll_dir_read(inode, &pos, op_data, ctx);
 385         pos = ctx->pos;
 386 #else
 387         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 388 #endif
 389         if (lfd != NULL)
 390                 lfd->lfd_pos = pos;
 391
 392         if (pos == MDS_DIR_END_OFF) {
 393                 if (api32)
 394                         pos = LL_DIR_END_OFF_32BIT;
 395                 else
 396                         pos = LL_DIR_END_OFF;
 397         } else {
 398                 if (api32 && hash64)
 399                         pos = pos >> 32;
 400         }
 401 #ifdef HAVE_DIR_CONTEXT
 402         ctx->pos = pos;
 403 #else
 404         filp->f_pos = pos;
 405 #endif
 406         ll_finish_md_op_data(op_data);
 407         filp->f_version = inode->i_version;
 408
 409 out:
 410         if (!rc)
 411                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 412
 413         RETURN(rc);
 414 }
 415
 416 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 417 {
 418         struct mgs_send_param *msp;
 419         int rc = 0;
 420
 421         OBD_ALLOC_PTR(msp);
 422         if (!msp)
 423                 return -ENOMEM;
 424
 425         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 426         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 427                                 sizeof(struct mgs_send_param), msp, NULL);
 428         if (rc)
 429                 CERROR("Failed to set parameter: %d\n", rc);
 430         OBD_FREE_PTR(msp);
 431
 432         return rc;
 433 }
 434
 435 /**
 436  * Create striped directory with specified stripe(@lump)
 437  *
 438  * param[in]parent      the parent of the directory.
 439  * param[in]lump        the specified stripes.
 440  * param[in]dirname     the name of the directory.
 441  * param[in]mode        the specified mode of the directory.
 442  *
 443  * retval               =0 if striped directory is being created successfully.
 444  *                      <0 if the creation is failed.
 445  */
 446 static int ll_dir_setdirstripe(struct inode *parent, struct lmv_user_md *lump,
 447                                const char *dirname, umode_t mode)
 448 {
 449         struct ptlrpc_request *request = NULL;
 450         struct md_op_data *op_data;
 451         struct ll_sb_info *sbi = ll_i2sbi(parent);
 452         int err;
 453         ENTRY;
 454
 455         if (unlikely(lump->lum_magic != LMV_USER_MAGIC))
 456                 RETURN(-EINVAL);
 457
 458         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) name %s"
 459                "stripe_offset %d, stripe_count: %u\n",
 460                PFID(ll_inode2fid(parent)), parent, dirname,
 461                (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 462
 463         if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
 464                 lustre_swab_lmv_user_md(lump);
 465
 466         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 467                 mode &= ~current_umask();
 468         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 469         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 470                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 471                                      lump);
 472         if (IS_ERR(op_data))
 473                 GOTO(err_exit, err = PTR_ERR(op_data));
 474
 475         op_data->op_cli_flags |= CLI_SET_MEA;
 476         err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
 477                         from_kuid(&init_user_ns, current_fsuid()),
 478                         from_kgid(&init_user_ns, current_fsgid()),
 479                         cfs_curproc_cap_pack(), 0, &request);
 480         ll_finish_md_op_data(op_data);
 481         if (err)
 482                 GOTO(err_exit, err);
 483 err_exit:
 484         ptlrpc_req_finished(request);
 485         return err;
 486 }
 487
 488 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 489                      int set_default)
 490 {
 491         struct ll_sb_info *sbi = ll_i2sbi(inode);
 492         struct md_op_data *op_data;
 493         struct ptlrpc_request *req = NULL;
 494         int rc = 0;
 495         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 496         struct obd_device *mgc = lsi->lsi_mgc;
 497         int lum_size;
 498         ENTRY;
 499
 500         if (lump != NULL) {
 501                 /*
 502                  * This is coming from userspace, so should be in
 503                  * local endian.  But the MDS would like it in little
 504                  * endian, so we swab it before we send it.
 505                  */
 506                 switch (lump->lmm_magic) {
 507                 case LOV_USER_MAGIC_V1: {
 508                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 509                                 lustre_swab_lov_user_md_v1(lump);
 510                         lum_size = sizeof(struct lov_user_md_v1);
 511                         break;
 512                 }
 513                 case LOV_USER_MAGIC_V3: {
 514                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 515                                 lustre_swab_lov_user_md_v3(
 516                                         (struct lov_user_md_v3 *)lump);
 517                         lum_size = sizeof(struct lov_user_md_v3);
 518                         break;
 519                 }
 520                 case LMV_USER_MAGIC: {
 521                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 522                                 lustre_swab_lmv_user_md(
 523                                         (struct lmv_user_md *)lump);
 524                         lum_size = sizeof(struct lmv_user_md);
 525                         break;
 526                 }
 527                 default: {
 528                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 529                                         " %#08x != %#08x nor %#08x\n",
 530                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 531                                         LOV_USER_MAGIC_V3);
 532                         RETURN(-EINVAL);
 533                 }
 534                 }
 535         } else {
 536                 lum_size = sizeof(struct lov_user_md_v1);
 537         }
 538
 539         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 540                                      LUSTRE_OPC_ANY, NULL);
 541         if (IS_ERR(op_data))
 542                 RETURN(PTR_ERR(op_data));
 543
 544         /* swabbing is done in lov_setstripe() on server side */
 545         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 546         ll_finish_md_op_data(op_data);
 547         ptlrpc_req_finished(req);
 548         if (rc) {
 549                 if (rc != -EPERM && rc != -EACCES)
 550                         CERROR("mdc_setattr fails: rc = %d\n", rc);
 551         }
 552
 553         /* In the following we use the fact that LOV_USER_MAGIC_V1 and
 554          LOV_USER_MAGIC_V3 have the same initial fields so we do not
 555          need the make the distiction between the 2 versions */
 556         if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
 557                 char *param = NULL;
 558                 char *buf;
 559
 560                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 561                 if (param == NULL)
 562                         GOTO(end, rc = -ENOMEM);
 563
 564                 buf = param;
 565                 /* Get fsname and assume devname to be -MDT0000. */
 566                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 567                 strcat(buf, "-MDT0000.lov");
 568                 buf += strlen(buf);
 569
 570                 /* Set root stripesize */
 571                 sprintf(buf, ".stripesize=%u",
 572                         lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 573                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 574                 if (rc)
 575                         GOTO(end, rc);
 576
 577                 /* Set root stripecount */
 578                 sprintf(buf, ".stripecount=%hd",
 579                         lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 580                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 581                 if (rc)
 582                         GOTO(end, rc);
 583
 584                 /* Set root stripeoffset */
 585                 sprintf(buf, ".stripeoffset=%hd",
 586                         lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 587                         (typeof(lump->lmm_stripe_offset))(-1));
 588                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 589
 590 end:
 591                 if (param != NULL)
 592                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 593         }
 594         RETURN(rc);
 595 }
 596
 597 /**
 598  * This function will be used to get default LOV/LMV/Default LMV
 599  * @valid will be used to indicate which stripe it will retrieve
 600  *      OBD_MD_MEA              LMV stripe EA
 601  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 602  *      otherwise               Default LOV EA.
 603  * Each time, it can only retrieve 1 stripe EA
 604  **/
 605 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 606                      struct ptlrpc_request **request, u64 valid)
 607 {
 608         struct ll_sb_info *sbi = ll_i2sbi(inode);
 609         struct mdt_body   *body;
 610         struct lov_mds_md *lmm = NULL;
 611         struct ptlrpc_request *req = NULL;
 612         int rc, lmm_size;
 613         struct md_op_data *op_data;
 614         ENTRY;
 615
 616         rc = ll_get_default_mdsize(sbi, &lmm_size);
 617         if (rc)
 618                 RETURN(rc);
 619
 620         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 621                                      0, lmm_size, LUSTRE_OPC_ANY,
 622                                      NULL);
 623         if (IS_ERR(op_data))
 624                 RETURN(PTR_ERR(op_data));
 625
 626         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 627         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 628         ll_finish_md_op_data(op_data);
 629         if (rc < 0) {
 630                 CDEBUG(D_INFO, "md_getattr failed on inode "
 631                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 632                 GOTO(out, rc);
 633         }
 634
 635         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 636         LASSERT(body != NULL);
 637
 638         lmm_size = body->mbo_eadatasize;
 639
 640         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 641             lmm_size == 0) {
 642                 GOTO(out, rc = -ENODATA);
 643         }
 644
 645         lmm = req_capsule_server_sized_get(&req->rq_pill,
 646                                            &RMF_MDT_MD, lmm_size);
 647         LASSERT(lmm != NULL);
 648
 649         /*
 650          * This is coming from the MDS, so is probably in
 651          * little endian.  We convert it to host endian before
 652          * passing it to userspace.
 653          */
 654         /* We don't swab objects for directories */
 655         switch (le32_to_cpu(lmm->lmm_magic)) {
 656         case LOV_MAGIC_V1:
 657                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 658                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 659                 break;
 660         case LOV_MAGIC_V3:
 661                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 662                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 663                 break;
 664         case LMV_MAGIC_V1:
 665                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 666                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 667                 break;
 668         case LMV_USER_MAGIC:
 669                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 670                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 671                 break;
 672         default:
 673                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 674                 rc = -EPROTO;
 675         }
 676 out:
 677         *plmm = lmm;
 678         *plmm_size = lmm_size;
 679         *request = req;
 680         return rc;
 681 }
 682
 683 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 684 {
 685         struct md_op_data       *op_data;
 686         int                     rc;
 687         int                     mdt_index;
 688         ENTRY;
 689
 690         OBD_ALLOC_PTR(op_data);
 691         if (op_data == NULL)
 692                 RETURN(-ENOMEM);
 693
 694         op_data->op_flags |= MF_GET_MDT_IDX;
 695         op_data->op_fid1 = *fid;
 696         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 697         mdt_index = op_data->op_mds;
 698         OBD_FREE_PTR(op_data);
 699         if (rc < 0)
 700                 RETURN(rc);
 701
 702         RETURN(mdt_index);
 703 }
 704
 705 /*
 706  *  Get MDT index for the inode.
 707  */
 708 int ll_get_mdt_idx(struct inode *inode)
 709 {
 710         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 711 }
 712
 713 /**
 714  * Generic handler to do any pre-copy work.
 715  *
 716  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 717  * first information for it that real work has started.
 718  *
 719  * Moreover, for a ARCHIVE request, it will sample the file data version and
 720  * store it in \a copy.
 721  *
 722  * \return 0 on success.
 723  */
 724 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 725 {
 726         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 727         struct hsm_progress_kernel       hpk;
 728         int                              rc = 0;
 729         int                              rc2;
 730         ENTRY;
 731
 732         /* Forge a hsm_progress based on data from copy. */
 733         hpk.hpk_fid = copy->hc_hai.hai_fid;
 734         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 735         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 736         hpk.hpk_extent.length = 0;
 737         hpk.hpk_flags = 0;
 738         hpk.hpk_errval = 0;
 739         hpk.hpk_data_version = 0;
 740
 741
 742         /* For archive request, we need to read the current file version. */
 743         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 744                 struct inode    *inode;
 745                 __u64            data_version = 0;
 746
 747                 /* Get inode for this fid */
 748                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 749                 if (IS_ERR(inode)) {
 750                         hpk.hpk_flags |= HP_FLAG_RETRY;
 751                         /* hpk_errval is >= 0 */
 752                         hpk.hpk_errval = -PTR_ERR(inode);
 753                         GOTO(progress, rc = PTR_ERR(inode));
 754                 }
 755
 756                 /* Read current file data version */
 757                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 758                 iput(inode);
 759                 if (rc != 0) {
 760                         CDEBUG(D_HSM, "Could not read file data version of "
 761                                       DFID" (rc = %d). Archive request ("
 762                                       LPX64") could not be done.\n",
 763                                       PFID(&copy->hc_hai.hai_fid), rc,
 764                                       copy->hc_hai.hai_cookie);
 765                         hpk.hpk_flags |= HP_FLAG_RETRY;
 766                         /* hpk_errval must be >= 0 */
 767                         hpk.hpk_errval = -rc;
 768                         GOTO(progress, rc);
 769                 }
 770
 771                 /* Store in the hsm_copy for later copytool use.
 772                  * Always modified even if no lsm. */
 773                 copy->hc_data_version = data_version;
 774         }
 775
 776 progress:
 777         /* On error, the request should be considered as completed */
 778         if (hpk.hpk_errval > 0)
 779                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 780
 781         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 782                             &hpk, NULL);
 783
 784         /* Return first error */
 785         RETURN(rc != 0 ? rc : rc2);
 786 }
 787
 788 /**
 789  * Generic handler to do any post-copy work.
 790  *
 791  * It will send the last hsm_progress update to coordinator to inform it
 792  * that copy is finished and whether it was successful or not.
 793  *
 794  * Moreover,
 795  * - for ARCHIVE request, it will sample the file data version and compare it
 796  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 797  *   will be considered as failed.
 798  * - for RESTORE request, it will sample the file data version and send it to
 799  *   coordinator which is useful if the file was imported as 'released'.
 800  *
 801  * \return 0 on success.
 802  */
 803 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 804 {
 805         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 806         struct hsm_progress_kernel       hpk;
 807         int                              rc = 0;
 808         int                              rc2;
 809         ENTRY;
 810
 811         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 812         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 813          * initialized if copy_end was called with copy == NULL.
 814          */
 815
 816         /* Forge a hsm_progress based on data from copy. */
 817         hpk.hpk_fid = copy->hc_hai.hai_fid;
 818         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 819         hpk.hpk_extent = copy->hc_hai.hai_extent;
 820         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 821         hpk.hpk_errval = copy->hc_errval;
 822         hpk.hpk_data_version = 0;
 823
 824         /* For archive request, we need to check the file data was not changed.
 825          *
 826          * For restore request, we need to send the file data version, this is
 827          * useful when the file was created using hsm_import.
 828          */
 829         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 830              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 831             (copy->hc_errval == 0)) {
 832                 struct inode    *inode;
 833                 __u64            data_version = 0;
 834
 835                 /* Get lsm for this fid */
 836                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 837                 if (IS_ERR(inode)) {
 838                         hpk.hpk_flags |= HP_FLAG_RETRY;
 839                         /* hpk_errval must be >= 0 */
 840                         hpk.hpk_errval = -PTR_ERR(inode);
 841                         GOTO(progress, rc = PTR_ERR(inode));
 842                 }
 843
 844                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 845                 iput(inode);
 846                 if (rc) {
 847                         CDEBUG(D_HSM, "Could not read file data version. "
 848                                       "Request could not be confirmed.\n");
 849                         if (hpk.hpk_errval == 0)
 850                                 hpk.hpk_errval = -rc;
 851                         GOTO(progress, rc);
 852                 }
 853
 854                 /* Store in the hsm_copy for later copytool use.
 855                  * Always modified even if no lsm. */
 856                 hpk.hpk_data_version = data_version;
 857
 858                 /* File could have been stripped during archiving, so we need
 859                  * to check anyway. */
 860                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 861                     (copy->hc_data_version != data_version)) {
 862                         CDEBUG(D_HSM, "File data version mismatched. "
 863                               "File content was changed during archiving. "
 864                                DFID", start:"LPX64" current:"LPX64"\n",
 865                                PFID(&copy->hc_hai.hai_fid),
 866                                copy->hc_data_version, data_version);
 867                         /* File was changed, send error to cdt. Do not ask for
 868                          * retry because if a file is modified frequently,
 869                          * the cdt will loop on retried archive requests.
 870                          * The policy engine will ask for a new archive later
 871                          * when the file will not be modified for some tunable
 872                          * time */
 873                         /* we do not notify caller */
 874                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 875                         /* hpk_errval must be >= 0 */
 876                         hpk.hpk_errval = EBUSY;
 877                 }
 878
 879         }
 880
 881 progress:
 882         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 883                             &hpk, NULL);
 884
 885         /* Return first error */
 886         RETURN(rc != 0 ? rc : rc2);
 887 }
 888
 889
 890 static int copy_and_ioctl(int cmd, struct obd_export *exp,
 891                           const void __user *data, size_t size)
 892 {
 893         void *copy;
 894         int rc;
 895
 896         OBD_ALLOC(copy, size);
 897         if (copy == NULL)
 898                 return -ENOMEM;
 899
 900         if (copy_from_user(copy, data, size)) {
 901                 rc = -EFAULT;
 902                 goto out;
 903         }
 904
 905         rc = obd_iocontrol(cmd, exp, size, copy, NULL);
 906 out:
 907         OBD_FREE(copy, size);
 908
 909         return rc;
 910 }
 911
 912 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
 913 {
 914         int cmd = qctl->qc_cmd;
 915         int type = qctl->qc_type;
 916         int id = qctl->qc_id;
 917         int valid = qctl->qc_valid;
 918         int rc = 0;
 919         ENTRY;
 920
 921         switch (cmd) {
 922         case LUSTRE_Q_INVALIDATE:
 923         case LUSTRE_Q_FINVALIDATE:
 924         case Q_QUOTAON:
 925         case Q_QUOTAOFF:
 926         case Q_SETQUOTA:
 927         case Q_SETINFO:
 928                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
 929                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
 930                         RETURN(-EPERM);
 931                 break;
 932         case Q_GETQUOTA:
 933                 if (((type == USRQUOTA &&
 934                       !uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
 935                      (type == GRPQUOTA &&
 936                       !in_egroup_p(make_kgid(&init_user_ns, id)))) &&
 937                     (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
 938                      sbi->ll_flags & LL_SBI_RMT_CLIENT))
 939                         RETURN(-EPERM);
 940                 break;
 941         case Q_GETINFO:
 942                 break;
 943         default:
 944                 CERROR("unsupported quotactl op: %#x\n", cmd);
 945                 RETURN(-ENOTTY);
 946         }
 947
 948         if (valid != QC_GENERAL) {
 949                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 950                         RETURN(-EOPNOTSUPP);
 951
 952                 if (cmd == Q_GETINFO)
 953                         qctl->qc_cmd = Q_GETOINFO;
 954                 else if (cmd == Q_GETQUOTA)
 955                         qctl->qc_cmd = Q_GETOQUOTA;
 956                 else
 957                         RETURN(-EINVAL);
 958
 959                 switch (valid) {
 960                 case QC_MDTIDX:
 961                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
 962                                            sizeof(*qctl), qctl, NULL);
 963                         break;
 964                 case QC_OSTIDX:
 965                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
 966                                            sizeof(*qctl), qctl, NULL);
 967                         break;
 968                 case QC_UUID:
 969                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
 970                                            sizeof(*qctl), qctl, NULL);
 971                         if (rc == -EAGAIN)
 972                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
 973                                                    sbi->ll_dt_exp,
 974                                                    sizeof(*qctl), qctl, NULL);
 975                         break;
 976                 default:
 977                         rc = -EINVAL;
 978                         break;
 979                 }
 980
 981                 if (rc)
 982                         RETURN(rc);
 983
 984                 qctl->qc_cmd = cmd;
 985         } else {
 986                 struct obd_quotactl *oqctl;
 987
 988                 OBD_ALLOC_PTR(oqctl);
 989                 if (oqctl == NULL)
 990                         RETURN(-ENOMEM);
 991
 992                 QCTL_COPY(oqctl, qctl);
 993                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
 994                 if (rc) {
 995                         if (rc != -EALREADY && cmd == Q_QUOTAON) {
 996                                 oqctl->qc_cmd = Q_QUOTAOFF;
 997                                 obd_quotactl(sbi->ll_md_exp, oqctl);
 998                         }
 999                         OBD_FREE_PTR(oqctl);
1000                         RETURN(rc);
1001                 }
1002                 /* If QIF_SPACE is not set, client should collect the
1003                  * space usage from OSSs by itself */
1004                 if (cmd == Q_GETQUOTA &&
1005                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1006                     !oqctl->qc_dqblk.dqb_curspace) {
1007                         struct obd_quotactl *oqctl_tmp;
1008
1009                         OBD_ALLOC_PTR(oqctl_tmp);
1010                         if (oqctl_tmp == NULL)
1011                                 GOTO(out, rc = -ENOMEM);
1012
1013                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1014                         oqctl_tmp->qc_id = oqctl->qc_id;
1015                         oqctl_tmp->qc_type = oqctl->qc_type;
1016
1017                         /* collect space usage from OSTs */
1018                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1019                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1020                         if (!rc || rc == -EREMOTEIO) {
1021                                 oqctl->qc_dqblk.dqb_curspace =
1022                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1023                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1024                         }
1025
1026                         /* collect space & inode usage from MDTs */
1027                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1028                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1029                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1030                         if (!rc || rc == -EREMOTEIO) {
1031                                 oqctl->qc_dqblk.dqb_curspace +=
1032                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1033                                 oqctl->qc_dqblk.dqb_curinodes =
1034                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1035                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1036                         } else {
1037                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1038                         }
1039
1040                         OBD_FREE_PTR(oqctl_tmp);
1041                 }
1042 out:
1043                 QCTL_COPY(qctl, oqctl);
1044                 OBD_FREE_PTR(oqctl);
1045         }
1046
1047         RETURN(rc);
1048 }
1049
1050 static char *
1051 ll_getname(const char __user *filename)
1052 {
1053         int ret = 0, len;
1054         char *tmp = __getname();
1055
1056         if (!tmp)
1057                 return ERR_PTR(-ENOMEM);
1058
1059         len = strncpy_from_user(tmp, filename, PATH_MAX);
1060         if (len == 0)
1061                 ret = -ENOENT;
1062         else if (len > PATH_MAX)
1063                 ret = -ENAMETOOLONG;
1064
1065         if (ret) {
1066                 __putname(tmp);
1067                 tmp =  ERR_PTR(ret);
1068         }
1069         return tmp;
1070 }
1071
1072 #define ll_putname(filename) __putname(filename)
1073
1074 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1075 {
1076         struct inode *inode = file->f_dentry->d_inode;
1077         struct ll_sb_info *sbi = ll_i2sbi(inode);
1078         struct obd_ioctl_data *data;
1079         int rc = 0;
1080         ENTRY;
1081
1082         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1083                PFID(ll_inode2fid(inode)), inode, cmd);
1084
1085         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1086         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1087                 return -ENOTTY;
1088
1089         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1090         switch(cmd) {
1091         case FSFILT_IOC_GETFLAGS:
1092         case FSFILT_IOC_SETFLAGS:
1093                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1094         case FSFILT_IOC_GETVERSION_OLD:
1095         case FSFILT_IOC_GETVERSION:
1096                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1097         /* We need to special case any other ioctls we want to handle,
1098          * to send them to the MDS/OST as appropriate and to properly
1099          * network encode the arg field.
1100         case FSFILT_IOC_SETVERSION_OLD:
1101         case FSFILT_IOC_SETVERSION:
1102         */
1103         case LL_IOC_GET_MDTIDX: {
1104                 int mdtidx;
1105
1106                 mdtidx = ll_get_mdt_idx(inode);
1107                 if (mdtidx < 0)
1108                         RETURN(mdtidx);
1109
1110                 if (put_user((int)mdtidx, (int __user *)arg))
1111                         RETURN(-EFAULT);
1112
1113                 return 0;
1114         }
1115         case IOC_MDC_LOOKUP: {
1116                 int namelen, len = 0;
1117                 char *buf = NULL;
1118                 char *filename;
1119
1120                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1121                 if (rc != 0)
1122                         RETURN(rc);
1123                 data = (void *)buf;
1124
1125                 filename = data->ioc_inlbuf1;
1126                 namelen = strlen(filename);
1127                 if (namelen < 1) {
1128                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1129                         GOTO(out_free, rc = -EINVAL);
1130                 }
1131
1132                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL);
1133                 if (rc < 0) {
1134                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1135                                ll_get_fsname(inode->i_sb, NULL, 0), namelen,
1136                                filename, rc);
1137                         GOTO(out_free, rc);
1138                 }
1139 out_free:
1140                 obd_ioctl_freedata(buf, len);
1141                 return rc;
1142         }
1143         case LL_IOC_LMV_SETSTRIPE: {
1144                 struct lmv_user_md  *lum;
1145                 char            *buf = NULL;
1146                 char            *filename;
1147                 int              namelen = 0;
1148                 int              lumlen = 0;
1149                 umode_t          mode;
1150                 int              len;
1151                 int              rc;
1152
1153                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1154                 if (rc)
1155                         RETURN(rc);
1156
1157                 data = (void *)buf;
1158                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1159                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1160                         GOTO(lmv_out_free, rc = -EINVAL);
1161
1162                 filename = data->ioc_inlbuf1;
1163                 namelen = data->ioc_inllen1;
1164
1165                 if (namelen < 1) {
1166                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1167                         GOTO(lmv_out_free, rc = -EINVAL);
1168                 }
1169                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1170                 lumlen = data->ioc_inllen2;
1171
1172                 if (lum->lum_magic != LMV_USER_MAGIC ||
1173                     lumlen != sizeof(*lum)) {
1174                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1175                                filename, lum->lum_magic, lumlen, -EFAULT);
1176                         GOTO(lmv_out_free, rc = -EINVAL);
1177                 }
1178
1179 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1180                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1181 #else
1182                 mode = data->ioc_type;
1183 #endif
1184                 rc = ll_dir_setdirstripe(inode, lum, filename, mode);
1185 lmv_out_free:
1186                 obd_ioctl_freedata(buf, len);
1187                 RETURN(rc);
1188
1189         }
1190         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1191                 struct lmv_user_md        lum;
1192                 struct lmv_user_md __user *ulump =
1193                                         (struct lmv_user_md __user *)arg;
1194                 int                       rc;
1195
1196                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1197                         RETURN(-EFAULT);
1198
1199                 if (lum.lum_magic != LMV_USER_MAGIC)
1200                         RETURN(-EINVAL);
1201
1202                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1203
1204                 RETURN(rc);
1205         }
1206         case LL_IOC_LOV_SETSTRIPE: {
1207                 struct lov_user_md_v3 lumv3;
1208                 struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
1209                 struct lov_user_md_v1 __user *lumv1p =
1210                         (struct lov_user_md_v1 __user *)arg;
1211                 struct lov_user_md_v3 __user *lumv3p =
1212                         (struct lov_user_md_v3 __user *)arg;
1213
1214                 int set_default = 0;
1215
1216                 LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
1217                 LASSERT(sizeof(lumv3.lmm_objects[0]) ==
1218                         sizeof(lumv3p->lmm_objects[0]));
1219                 /* first try with v1 which is smaller than v3 */
1220                 if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
1221                         RETURN(-EFAULT);
1222
1223                 if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ) {
1224                         if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
1225                                 RETURN(-EFAULT);
1226                 }
1227
1228                 if (inode->i_sb->s_root == file->f_dentry)
1229                         set_default = 1;
1230
1231                 /* in v1 and v3 cases lumv1 points to data */
1232                 rc = ll_dir_setstripe(inode, lumv1, set_default);
1233
1234                 RETURN(rc);
1235         }
1236         case LL_IOC_LMV_GETSTRIPE: {
1237                 struct lmv_user_md __user *ulmv =
1238                                         (struct lmv_user_md __user *)arg;
1239                 struct lmv_user_md      lum;
1240                 struct ptlrpc_request   *request = NULL;
1241                 union lmv_mds_md        *lmm = NULL;
1242                 int                     lmmsize;
1243                 u64                     valid = 0;
1244                 struct lmv_user_md      *tmp = NULL;
1245                 int                     mdt_index;
1246                 int                     lum_size;
1247                 int                     stripe_count;
1248                 int                     i;
1249                 int                     rc;
1250
1251                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1252                         RETURN(-EFAULT);
1253
1254                 /* lum_magic will indicate which stripe the ioctl will like
1255                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1256                  * is for default LMV stripe */
1257                 if (lum.lum_magic == LMV_MAGIC_V1)
1258                         valid |= OBD_MD_MEA;
1259                 else if (lum.lum_magic == LMV_USER_MAGIC)
1260                         valid |= OBD_MD_DEFAULT_MEA;
1261                 else
1262                         RETURN(-EINVAL);
1263
1264                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1265                                       valid);
1266                 if (rc != 0)
1267                         GOTO(finish_req, rc);
1268
1269                 /* Get default LMV EA */
1270                 if (lum.lum_magic == LMV_USER_MAGIC) {
1271                         if (rc != 0)
1272                                 GOTO(finish_req, rc);
1273
1274                         if (lmmsize > sizeof(*ulmv))
1275                                 GOTO(finish_req, rc = -EINVAL);
1276
1277                         if (copy_to_user(ulmv, lmm, lmmsize))
1278                                 GOTO(finish_req, rc = -EFAULT);
1279
1280                         GOTO(finish_req, rc);
1281                 }
1282
1283                 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1284                 lum_size = lmv_user_md_size(stripe_count, LMV_MAGIC_V1);
1285                 OBD_ALLOC(tmp, lum_size);
1286                 if (tmp == NULL)
1287                         GOTO(finish_req, rc = -ENOMEM);
1288
1289                 mdt_index = ll_get_mdt_idx(inode);
1290                 if (mdt_index < 0)
1291                         GOTO(out_tmp, rc = -ENOMEM);
1292
1293                 tmp->lum_magic = LMV_MAGIC_V1;
1294                 tmp->lum_stripe_count = 0;
1295                 tmp->lum_stripe_offset = mdt_index;
1296                 for (i = 0; i < stripe_count; i++) {
1297                         struct lu_fid   fid;
1298
1299                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1300                         mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1301                         if (mdt_index < 0)
1302                                 GOTO(out_tmp, rc = mdt_index);
1303
1304                         tmp->lum_objects[i].lum_mds = mdt_index;
1305                         tmp->lum_objects[i].lum_fid = fid;
1306                         tmp->lum_stripe_count++;
1307                 }
1308
1309                 if (copy_to_user(ulmv, tmp, lum_size))
1310                         GOTO(out_tmp, rc = -EFAULT);
1311 out_tmp:
1312                 OBD_FREE(tmp, lum_size);
1313 finish_req:
1314                 ptlrpc_req_finished(request);
1315                 return rc;
1316         }
1317
1318         case LL_IOC_REMOVE_ENTRY: {
1319                 char            *filename = NULL;
1320                 int              namelen = 0;
1321                 int              rc;
1322
1323                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1324                  * unsupported server, which might crash the server(LU-2730),
1325                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1326                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1327                  * server will support REINT_RMENTRY XXX*/
1328                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1329                         RETURN(-ENOTSUPP);
1330
1331                 filename = ll_getname((const char __user *)arg);
1332                 if (IS_ERR(filename))
1333                         RETURN(PTR_ERR(filename));
1334
1335                 namelen = strlen(filename);
1336                 if (namelen < 1)
1337                         GOTO(out_rmdir, rc = -EINVAL);
1338
1339                 rc = ll_rmdir_entry(inode, filename, namelen);
1340 out_rmdir:
1341                 if (filename)
1342                         ll_putname(filename);
1343                 RETURN(rc);
1344         }
1345         case LL_IOC_LOV_SWAP_LAYOUTS:
1346                 RETURN(-EPERM);
1347         case IOC_OBD_STATFS:
1348                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1349         case LL_IOC_LOV_GETSTRIPE:
1350         case LL_IOC_MDC_GETINFO:
1351         case IOC_MDC_GETFILEINFO:
1352         case IOC_MDC_GETFILESTRIPE: {
1353                 struct ptlrpc_request *request = NULL;
1354                 struct lov_user_md __user *lump;
1355                 struct lov_mds_md *lmm = NULL;
1356                 struct mdt_body *body;
1357                 char *filename = NULL;
1358                 int lmmsize;
1359
1360                 if (cmd == IOC_MDC_GETFILEINFO ||
1361                     cmd == IOC_MDC_GETFILESTRIPE) {
1362                         filename = ll_getname((const char __user *)arg);
1363                         if (IS_ERR(filename))
1364                                 RETURN(PTR_ERR(filename));
1365
1366                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1367                                                       &lmmsize, &request);
1368                 } else {
1369                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1370                                               &request, 0);
1371                 }
1372
1373                 if (request) {
1374                         body = req_capsule_server_get(&request->rq_pill,
1375                                                       &RMF_MDT_BODY);
1376                         LASSERT(body != NULL);
1377                 } else {
1378                         GOTO(out_req, rc);
1379                 }
1380
1381                 if (rc < 0) {
1382                         if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1383                                                cmd == LL_IOC_MDC_GETINFO))
1384                                 GOTO(skip_lmm, rc = 0);
1385                         else
1386                                 GOTO(out_req, rc);
1387                 }
1388
1389                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1390                     cmd == LL_IOC_LOV_GETSTRIPE) {
1391                         lump = (struct lov_user_md __user *)arg;
1392                 } else {
1393                         struct lov_user_mds_data __user *lmdp;
1394                         lmdp = (struct lov_user_mds_data __user *)arg;
1395                         lump = &lmdp->lmd_lmm;
1396                 }
1397                 if (copy_to_user(lump, lmm, lmmsize)) {
1398                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1399                                 GOTO(out_req, rc = -EFAULT);
1400                         rc = -EOVERFLOW;
1401                 }
1402         skip_lmm:
1403                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1404                         struct lov_user_mds_data __user *lmdp;
1405                         lstat_t st = { 0 };
1406
1407                         st.st_dev       = inode->i_sb->s_dev;
1408                         st.st_mode      = body->mbo_mode;
1409                         st.st_nlink     = body->mbo_nlink;
1410                         st.st_uid       = body->mbo_uid;
1411                         st.st_gid       = body->mbo_gid;
1412                         st.st_rdev      = body->mbo_rdev;
1413                         st.st_size      = body->mbo_size;
1414                         st.st_blksize   = PAGE_CACHE_SIZE;
1415                         st.st_blocks    = body->mbo_blocks;
1416                         st.st_atime     = body->mbo_atime;
1417                         st.st_mtime     = body->mbo_mtime;
1418                         st.st_ctime     = body->mbo_ctime;
1419                         st.st_ino       = inode->i_ino;
1420
1421                         lmdp = (struct lov_user_mds_data __user *)arg;
1422                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1423                                 GOTO(out_req, rc = -EFAULT);
1424                 }
1425
1426                 EXIT;
1427         out_req:
1428                 ptlrpc_req_finished(request);
1429                 if (filename)
1430                         ll_putname(filename);
1431                 return rc;
1432         }
1433         case OBD_IOC_QUOTACHECK: {
1434                 struct obd_quotactl *oqctl;
1435                 int error = 0;
1436
1437                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1438                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1439                         RETURN(-EPERM);
1440
1441                 OBD_ALLOC_PTR(oqctl);
1442                 if (!oqctl)
1443                         RETURN(-ENOMEM);
1444                 oqctl->qc_type = arg;
1445                 rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
1446                 if (rc < 0) {
1447                         CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
1448                         error = rc;
1449                 }
1450
1451                 rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
1452                 if (rc < 0)
1453                         CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
1454
1455                 OBD_FREE_PTR(oqctl);
1456                 return error ?: rc;
1457         }
1458         case OBD_IOC_POLL_QUOTACHECK: {
1459                 struct if_quotacheck *check;
1460
1461                 if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
1462                     sbi->ll_flags & LL_SBI_RMT_CLIENT)
1463                         RETURN(-EPERM);
1464
1465                 OBD_ALLOC_PTR(check);
1466                 if (!check)
1467                         RETURN(-ENOMEM);
1468
1469                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
1470                                    NULL);
1471                 if (rc) {
1472                         CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
1473                         if (copy_to_user((void __user *)arg, check,
1474                                              sizeof(*check)))
1475                                 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1476                         GOTO(out_poll, rc);
1477                 }
1478
1479                 rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
1480                                    NULL);
1481                 if (rc) {
1482                         CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
1483                         if (copy_to_user((void __user *)arg, check,
1484                                              sizeof(*check)))
1485                                 CDEBUG(D_QUOTA, "copy_to_user failed\n");
1486                         GOTO(out_poll, rc);
1487                 }
1488         out_poll:
1489                 OBD_FREE_PTR(check);
1490                 RETURN(rc);
1491         }
1492 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 53, 0)
1493         case LL_IOC_QUOTACTL_18: {
1494                 /* copy the old 1.x quota struct for internal use, then copy
1495                  * back into old format struct.  For 1.8 compatibility. */
1496                 struct if_quotactl_18 *qctl_18;
1497                 struct if_quotactl *qctl_20;
1498
1499                 OBD_ALLOC_PTR(qctl_18);
1500                 if (!qctl_18)
1501                         RETURN(-ENOMEM);
1502
1503                 OBD_ALLOC_PTR(qctl_20);
1504                 if (!qctl_20)
1505                         GOTO(out_quotactl_18, rc = -ENOMEM);
1506
1507                 if (copy_from_user(qctl_18, (void __user *)arg,
1508                                    sizeof(*qctl_18)))
1509                         GOTO(out_quotactl_20, rc = -ENOMEM);
1510
1511                 QCTL_COPY(qctl_20, qctl_18);
1512                 qctl_20->qc_idx = 0;
1513
1514                 /* XXX: dqb_valid was borrowed as a flag to mark that
1515                  *      only mds quota is wanted */
1516                 if (qctl_18->qc_cmd == Q_GETQUOTA &&
1517                     qctl_18->qc_dqblk.dqb_valid) {
1518                         qctl_20->qc_valid = QC_MDTIDX;
1519                         qctl_20->qc_dqblk.dqb_valid = 0;
1520                 } else if (qctl_18->obd_uuid.uuid[0] != '\0') {
1521                         qctl_20->qc_valid = QC_UUID;
1522                         qctl_20->obd_uuid = qctl_18->obd_uuid;
1523                 } else {
1524                         qctl_20->qc_valid = QC_GENERAL;
1525                 }
1526
1527                 rc = quotactl_ioctl(sbi, qctl_20);
1528
1529                 if (rc == 0) {
1530                         QCTL_COPY(qctl_18, qctl_20);
1531                         qctl_18->obd_uuid = qctl_20->obd_uuid;
1532
1533                         if (copy_to_user((void __user *)arg, qctl_18,
1534                                              sizeof(*qctl_18)))
1535                                 rc = -EFAULT;
1536                 }
1537
1538         out_quotactl_20:
1539                 OBD_FREE_PTR(qctl_20);
1540         out_quotactl_18:
1541                 OBD_FREE_PTR(qctl_18);
1542                 RETURN(rc);
1543         }
1544 #endif /* LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 53, 0) */
1545         case OBD_IOC_QUOTACTL: {
1546                 struct if_quotactl *qctl;
1547
1548                 OBD_ALLOC_PTR(qctl);
1549                 if (!qctl)
1550                         RETURN(-ENOMEM);
1551
1552                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1553                         GOTO(out_quotactl, rc = -EFAULT);
1554
1555                 rc = quotactl_ioctl(sbi, qctl);
1556
1557                 if (rc == 0 &&
1558                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1559                         rc = -EFAULT;
1560
1561         out_quotactl:
1562                 OBD_FREE_PTR(qctl);
1563                 RETURN(rc);
1564         }
1565         case OBD_IOC_GETDTNAME:
1566         case OBD_IOC_GETMDNAME:
1567                 RETURN(ll_get_obd_name(inode, cmd, arg));
1568         case LL_IOC_FLUSHCTX:
1569                 RETURN(ll_flush_ctx(inode));
1570 #ifdef CONFIG_FS_POSIX_ACL
1571         case LL_IOC_RMTACL: {
1572             if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
1573                 inode == inode->i_sb->s_root->d_inode) {
1574                 struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1575
1576                 LASSERT(fd != NULL);
1577                 rc = rct_add(&sbi->ll_rct, current_pid(), arg);
1578                 if (!rc)
1579                         fd->fd_flags |= LL_FILE_RMTACL;
1580                 RETURN(rc);
1581             } else
1582                 RETURN(0);
1583         }
1584 #endif
1585         case LL_IOC_GETOBDCOUNT: {
1586                 u32 count, vallen;
1587                 struct obd_export *exp;
1588
1589                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1590                         RETURN(-EFAULT);
1591
1592                 /* get ost count when count is zero, get mdt count otherwise */
1593                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1594                 vallen = sizeof(count);
1595                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1596                                   KEY_TGT_COUNT, &vallen, &count);
1597                 if (rc) {
1598                         CERROR("get target count failed: %d\n", rc);
1599                         RETURN(rc);
1600                 }
1601
1602                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1603                         RETURN(-EFAULT);
1604
1605                 RETURN(0);
1606         }
1607         case LL_IOC_PATH2FID:
1608                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1609                                      sizeof(struct lu_fid)))
1610                         RETURN(-EFAULT);
1611                 RETURN(0);
1612         case LL_IOC_GET_CONNECT_FLAGS: {
1613                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1614                                      (void __user *)arg));
1615         }
1616         case OBD_IOC_CHANGELOG_SEND:
1617         case OBD_IOC_CHANGELOG_CLEAR:
1618                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1619                                     sizeof(struct ioc_changelog));
1620                 RETURN(rc);
1621         case OBD_IOC_FID2PATH:
1622                 RETURN(ll_fid2path(inode, (void __user *)arg));
1623         case LL_IOC_GETPARENT:
1624                 RETURN(ll_getparent(file, (void __user *)arg));
1625         case LL_IOC_FID2MDTIDX: {
1626                 struct obd_export *exp = ll_i2mdexp(inode);
1627                 struct lu_fid     fid;
1628                 __u32             index;
1629
1630                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1631                                    sizeof(fid)))
1632                         RETURN(-EFAULT);
1633
1634                 /* Call mdc_iocontrol */
1635                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1636                                    (__u32 __user *)&index);
1637                 if (rc != 0)
1638                         RETURN(rc);
1639
1640                 RETURN(index);
1641         }
1642         case LL_IOC_HSM_REQUEST: {
1643                 struct hsm_user_request *hur;
1644                 ssize_t                  totalsize;
1645
1646                 OBD_ALLOC_PTR(hur);
1647                 if (hur == NULL)
1648                         RETURN(-ENOMEM);
1649
1650                 /* We don't know the true size yet; copy the fixed-size part */
1651                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1652                         OBD_FREE_PTR(hur);
1653                         RETURN(-EFAULT);
1654                 }
1655
1656                 /* Compute the whole struct size */
1657                 totalsize = hur_len(hur);
1658                 OBD_FREE_PTR(hur);
1659                 if (totalsize < 0)
1660                         RETURN(-E2BIG);
1661
1662                 /* Final size will be more than double totalsize */
1663                 if (totalsize >= MDS_MAXREQSIZE / 3)
1664                         RETURN(-E2BIG);
1665
1666                 OBD_ALLOC_LARGE(hur, totalsize);
1667                 if (hur == NULL)
1668                         RETURN(-ENOMEM);
1669
1670                 /* Copy the whole struct */
1671                 if (copy_from_user(hur, (void __user *)arg, totalsize)) {
1672                         OBD_FREE_LARGE(hur, totalsize);
1673                         RETURN(-EFAULT);
1674                 }
1675
1676                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1677                         const struct lu_fid *fid;
1678                         struct inode *f;
1679                         int i;
1680
1681                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1682                                 fid = &hur->hur_user_item[i].hui_fid;
1683                                 f = search_inode_for_lustre(inode->i_sb, fid);
1684                                 if (IS_ERR(f)) {
1685                                         rc = PTR_ERR(f);
1686                                         break;
1687                                 }
1688
1689                                 rc = ll_hsm_release(f);
1690                                 iput(f);
1691                                 if (rc != 0)
1692                                         break;
1693                         }
1694                 } else {
1695                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1696                                            hur, NULL);
1697                 }
1698
1699                 OBD_FREE_LARGE(hur, totalsize);
1700
1701                 RETURN(rc);
1702         }
1703         case LL_IOC_HSM_PROGRESS: {
1704                 struct hsm_progress_kernel      hpk;
1705                 struct hsm_progress             hp;
1706
1707                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1708                         RETURN(-EFAULT);
1709
1710                 hpk.hpk_fid = hp.hp_fid;
1711                 hpk.hpk_cookie = hp.hp_cookie;
1712                 hpk.hpk_extent = hp.hp_extent;
1713                 hpk.hpk_flags = hp.hp_flags;
1714                 hpk.hpk_errval = hp.hp_errval;
1715                 hpk.hpk_data_version = 0;
1716
1717                 /* File may not exist in Lustre; all progress
1718                  * reported to Lustre root */
1719                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1720                                    NULL);
1721                 RETURN(rc);
1722         }
1723         case LL_IOC_HSM_CT_START:
1724                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1725                         RETURN(-EPERM);
1726
1727                 rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
1728                                     sizeof(struct lustre_kernelcomm));
1729                 RETURN(rc);
1730
1731         case LL_IOC_HSM_COPY_START: {
1732                 struct hsm_copy *copy;
1733                 int              rc;
1734
1735                 OBD_ALLOC_PTR(copy);
1736                 if (copy == NULL)
1737                         RETURN(-ENOMEM);
1738                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1739                         OBD_FREE_PTR(copy);
1740                         RETURN(-EFAULT);
1741                 }
1742
1743                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1744                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1745                         rc = -EFAULT;
1746
1747                 OBD_FREE_PTR(copy);
1748                 RETURN(rc);
1749         }
1750         case LL_IOC_HSM_COPY_END: {
1751                 struct hsm_copy *copy;
1752                 int              rc;
1753
1754                 OBD_ALLOC_PTR(copy);
1755                 if (copy == NULL)
1756                         RETURN(-ENOMEM);
1757                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1758                         OBD_FREE_PTR(copy);
1759                         RETURN(-EFAULT);
1760                 }
1761
1762                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1763                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1764                         rc = -EFAULT;
1765
1766                 OBD_FREE_PTR(copy);
1767                 RETURN(rc);
1768         }
1769         case LL_IOC_MIGRATE: {
1770                 char            *buf = NULL;
1771                 const char      *filename;
1772                 int             namelen = 0;
1773                 int             len;
1774                 int             rc;
1775                 int             mdtidx;
1776
1777                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1778                 if (rc < 0)
1779                         RETURN(rc);
1780
1781                 data = (struct obd_ioctl_data *)buf;
1782                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1783                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1784                         GOTO(migrate_free, rc = -EINVAL);
1785
1786                 filename = data->ioc_inlbuf1;
1787                 namelen = data->ioc_inllen1;
1788                 /* \0 is packed at the end of filename */
1789                 if (namelen < 1 || namelen != strlen(filename) + 1)
1790                         GOTO(migrate_free, rc = -EINVAL);
1791
1792                 if (data->ioc_inllen2 != sizeof(mdtidx))
1793                         GOTO(migrate_free, rc = -EINVAL);
1794                 mdtidx = *(int *)data->ioc_inlbuf2;
1795
1796                 rc = ll_migrate(inode, file, mdtidx, filename, namelen - 1);
1797 migrate_free:
1798                 obd_ioctl_freedata(buf, len);
1799
1800                 RETURN(rc);
1801         }
1802         default:
1803                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1804                                      (void __user *)arg));
1805         }
1806 }
1807
1808 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1809 {
1810         struct inode *inode = file->f_mapping->host;
1811         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1812         struct ll_sb_info *sbi = ll_i2sbi(inode);
1813         int api32 = ll_need_32bit_api(sbi);
1814         loff_t ret = -EINVAL;
1815         ENTRY;
1816
1817         mutex_lock(&inode->i_mutex);
1818         switch (origin) {
1819                 case SEEK_SET:
1820                         break;
1821                 case SEEK_CUR:
1822                         offset += file->f_pos;
1823                         break;
1824                 case SEEK_END:
1825                         if (offset > 0)
1826                                 GOTO(out, ret);
1827                         if (api32)
1828                                 offset += LL_DIR_END_OFF_32BIT;
1829                         else
1830                                 offset += LL_DIR_END_OFF;
1831                         break;
1832                 default:
1833                         GOTO(out, ret);
1834         }
1835
1836         if (offset >= 0 &&
1837             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1838              (!api32 && offset <= LL_DIR_END_OFF))) {
1839                 if (offset != file->f_pos) {
1840                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1841                             (!api32 && offset == LL_DIR_END_OFF))
1842                                 fd->lfd_pos = MDS_DIR_END_OFF;
1843                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1844                                 fd->lfd_pos = offset << 32;
1845                         else
1846                                 fd->lfd_pos = offset;
1847                         file->f_pos = offset;
1848                         file->f_version = 0;
1849                 }
1850                 ret = offset;
1851         }
1852         GOTO(out, ret);
1853
1854 out:
1855         mutex_unlock(&inode->i_mutex);
1856         return ret;
1857 }
1858
1859 static int ll_dir_open(struct inode *inode, struct file *file)
1860 {
1861         ENTRY;
1862         RETURN(ll_file_open(inode, file));
1863 }
1864
1865 static int ll_dir_release(struct inode *inode, struct file *file)
1866 {
1867         ENTRY;
1868         RETURN(ll_file_release(inode, file));
1869 }
1870
1871 const struct file_operations ll_dir_operations = {
1872         .llseek         = ll_dir_seek,
1873         .open           = ll_dir_open,
1874         .release        = ll_dir_release,
1875         .read           = generic_read_dir,
1876 #ifdef HAVE_DIR_CONTEXT
1877         .iterate        = ll_iterate,
1878 #else
1879         .readdir        = ll_readdir,
1880 #endif
1881         .unlocked_ioctl = ll_dir_ioctl,
1882         .fsync          = ll_fsync,
1883 };