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, 2017, 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/security.h>
  42 #include <linux/user_namespace.h>
  43 #ifdef HAVE_UIDGID_HEADER
  44 # include <linux/uidgid.h>
  45 #endif
  46 #include <linux/uaccess.h>
  47 #include <linux/buffer_head.h>   // for wait_on_buffer
  48 #include <linux/pagevec.h>
  49
  50 #define DEBUG_SUBSYSTEM S_LLITE
  51
  52 #include <obd_support.h>
  53 #include <obd_class.h>
  54 #include <uapi/linux/lustre/lustre_ioctl.h>
  55 #include <lustre_lib.h>
  56 #include <lustre_dlm.h>
  57 #include <lustre_fid.h>
  58 #include <lustre_kernelcomm.h>
  59 #include <lustre_swab.h>
  60
  61 #include "llite_internal.h"
  62
  63 /*
  64  * (new) readdir implementation overview.
  65  *
  66  * Original lustre readdir implementation cached exact copy of raw directory
  67  * pages on the client. These pages were indexed in client page cache by
  68  * logical offset in the directory file. This design, while very simple and
  69  * intuitive had some inherent problems:
  70  *
  71  *     . it implies that byte offset to the directory entry serves as a
  72  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  73  *     ext3/htree directory entries may move due to splits, and more
  74  *     importantly,
  75  *
  76  *     . it is incompatible with the design of split directories for cmd3,
  77  *     that assumes that names are distributed across nodes based on their
  78  *     hash, and so readdir should be done in hash order.
  79  *
  80  * New readdir implementation does readdir in hash order, and uses hash of a
  81  * file name as a telldir/seekdir cookie. This led to number of complications:
  82  *
  83  *     . hash is not unique, so it cannot be used to index cached directory
  84  *     pages on the client (note, that it requires a whole pageful of hash
  85  *     collided entries to cause two pages to have identical hashes);
  86  *
  87  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  88  *     entry cookie. ext3/htree has the same problem and lustre implementation
  89  *     mimics their solution: seekdir(hash) positions directory at the first
  90  *     entry with the given hash.
  91  *
  92  * Client side.
  93  *
  94  * 0. caching
  95  *
  96  * Client caches directory pages using hash of the first entry as an index. As
  97  * noted above hash is not unique, so this solution doesn't work as is:
  98  * special processing is needed for "page hash chains" (i.e., sequences of
  99  * pages filled with entries all having the same hash value).
 100  *
 101  * First, such chains have to be detected. To this end, server returns to the
 102  * client the hash of the first entry on the page next to one returned. When
 103  * client detects that this hash is the same as hash of the first entry on the
 104  * returned page, page hash collision has to be handled. Pages in the
 105  * hash chain, except first one, are termed "overflow pages".
 106  *
 107  * Solution to index uniqueness problem is to not cache overflow
 108  * pages. Instead, when page hash collision is detected, all overflow pages
 109  * from emerging chain are immediately requested from the server and placed in
 110  * a special data structure (struct ll_dir_chain). This data structure is used
 111  * by ll_readdir() to process entries from overflow pages. When readdir
 112  * invocation finishes, overflow pages are discarded. If page hash collision
 113  * chain weren't completely processed, next call to readdir will again detect
 114  * page hash collision, again read overflow pages in, process next portion of
 115  * entries and again discard the pages. This is not as wasteful as it looks,
 116  * because, given reasonable hash, page hash collisions are extremely rare.
 117  *
 118  * 1. directory positioning
 119  *
 120  * When seekdir(hash) is called, original
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  *
 128  *
 129  * Server.
 130  *
 131  * identification of and access to overflow pages
 132  *
 133  * page format
 134  *
 135  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 136  * a header lu_dirpage which describes the start/end hash, and whether this
 137  * page is empty (contains no dir entry) or hash collide with next page.
 138  * After client receives reply, several pages will be integrated into dir page
 139  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 140  * lu_dirpage for this integrated page will be adjusted. See
 141  * mdc_adjust_dirpages().
 142  *
 143  */
 144 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 145                              __u64 offset, struct ll_dir_chain *chain)
 146 {
 147         struct md_callback      cb_op;
 148         struct page             *page;
 149         int                     rc;
 150
 151         cb_op.md_blocking_ast = ll_md_blocking_ast;
 152         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 153         if (rc != 0)
 154                 return ERR_PTR(rc);
 155
 156         return page;
 157 }
 158
 159 void ll_release_page(struct inode *inode, struct page *page,
 160                      bool remove)
 161 {
 162         kunmap(page);
 163
 164         /* Always remove the page for striped dir, because the page is
 165          * built from temporarily in LMV layer */
 166         if (inode && ll_dir_striped(inode)) {
 167                 __free_page(page);
 168                 return;
 169         }
 170
 171         if (remove) {
 172                 lock_page(page);
 173                 if (likely(page->mapping != NULL))
 174                         delete_from_page_cache(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         struct lu_fid           pfid = { 0 };
 324         __u64                   pos;
 325         int                     rc;
 326         ENTRY;
 327
 328         if (lfd != NULL)
 329                 pos = lfd->lfd_pos;
 330         else
 331                 pos = 0;
 332
 333         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) pos/size"
 334                "%lu/%llu 32bit_api %d\n", PFID(ll_inode2fid(inode)),
 335                inode, (unsigned long)pos, i_size_read(inode), api32);
 336
 337         if (pos == MDS_DIR_END_OFF)
 338                 /*
 339                  * end-of-file.
 340                  */
 341                 GOTO(out, rc = 0);
 342
 343         if (unlikely(ll_dir_striped(inode))) {
 344                 /*
 345                  * This is only needed for striped dir to fill ..,
 346                  * see lmv_read_page()
 347                  */
 348                 if (file_dentry(filp)->d_parent != NULL &&
 349                     file_dentry(filp)->d_parent->d_inode != NULL) {
 350                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 351                         struct inode *parent =
 352                                 file_dentry(filp)->d_parent->d_inode;
 353
 354                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 355                                 pfid = *ll_inode2fid(parent);
 356                 }
 357
 358                 /* If it can not find in cache, do lookup .. on the master
 359                  * object */
 360                 if (fid_is_zero(&pfid)) {
 361                         rc = ll_dir_get_parent_fid(inode, &pfid);
 362                         if (rc != 0)
 363                                 RETURN(rc);
 364                 }
 365         }
 366
 367         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 368                                      LUSTRE_OPC_ANY, inode);
 369         if (IS_ERR(op_data))
 370                 GOTO(out, rc = PTR_ERR(op_data));
 371
 372         /* foreign dirs are browsed out of Lustre */
 373         if (unlikely(op_data->op_mea1 != NULL &&
 374                      op_data->op_mea1->lsm_md_magic == LMV_MAGIC_FOREIGN)) {
 375                 ll_finish_md_op_data(op_data);
 376                 RETURN(-ENODATA);
 377         }
 378
 379         op_data->op_fid3 = pfid;
 380
 381 #ifdef HAVE_DIR_CONTEXT
 382         ctx->pos = pos;
 383         rc = ll_dir_read(inode, &pos, op_data, ctx);
 384         pos = ctx->pos;
 385 #else
 386         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 387 #endif
 388         if (lfd != NULL)
 389                 lfd->lfd_pos = pos;
 390
 391         if (pos == MDS_DIR_END_OFF) {
 392                 if (api32)
 393                         pos = LL_DIR_END_OFF_32BIT;
 394                 else
 395                         pos = LL_DIR_END_OFF;
 396         } else {
 397                 if (api32 && hash64)
 398                         pos = pos >> 32;
 399         }
 400 #ifdef HAVE_DIR_CONTEXT
 401         ctx->pos = pos;
 402 #else
 403         filp->f_pos = pos;
 404 #endif
 405         ll_finish_md_op_data(op_data);
 406
 407 out:
 408         if (!rc)
 409                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 410
 411         RETURN(rc);
 412 }
 413
 414 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 415 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 416 {
 417         struct mgs_send_param *msp;
 418         int rc = 0;
 419
 420         OBD_ALLOC_PTR(msp);
 421         if (!msp)
 422                 return -ENOMEM;
 423
 424         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 425         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 426                                 sizeof(struct mgs_send_param), msp, NULL);
 427         if (rc)
 428                 CERROR("Failed to set parameter: %d\n", rc);
 429         OBD_FREE_PTR(msp);
 430
 431         return rc;
 432 }
 433 #endif
 434
 435 /**
 436  * Create striped directory with specified stripe(@lump)
 437  *
 438  * \param[in] dparent   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 dentry *dparent, struct lmv_user_md *lump,
 447                                size_t len, const char *dirname, umode_t mode)
 448 {
 449         struct inode *parent = dparent->d_inode;
 450         struct ptlrpc_request *request = NULL;
 451         struct md_op_data *op_data;
 452         struct ll_sb_info *sbi = ll_i2sbi(parent);
 453         struct inode *inode = NULL;
 454         struct dentry dentry = {
 455                 .d_parent = dparent,
 456                 .d_name = {
 457                         .name = dirname,
 458                         .len = strlen(dirname),
 459                         .hash = ll_full_name_hash(dparent, dirname,
 460                                                   strlen(dirname)),
 461                 },
 462         };
 463         int err;
 464         ENTRY;
 465
 466         if (unlikely(!lmv_magic_supported(lump->lum_magic)))
 467                 RETURN(-EINVAL);
 468
 469         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 470                 CDEBUG(D_VFSTRACE,
 471                        "VFS Op:inode="DFID"(%p) name %s stripe_offset %d, stripe_count: %u\n",
 472                        PFID(ll_inode2fid(parent)), parent, dirname,
 473                        (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 474         } else {
 475                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 476
 477                 CDEBUG(D_VFSTRACE,
 478                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 479                        PFID(ll_inode2fid(parent)), parent, dirname,
 480                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 481         }
 482
 483         if (lump->lum_stripe_count > 1 &&
 484             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 485                 RETURN(-EINVAL);
 486
 487         if (IS_DEADDIR(parent) &&
 488             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 489                 RETURN(-ENOENT);
 490
 491         if (unlikely(!lmv_magic_supported(cpu_to_le32(lump->lum_magic))))
 492                 lustre_swab_lmv_user_md(lump);
 493
 494         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 495                 mode &= ~current_umask();
 496         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 497         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 498                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 499                                      lump);
 500         if (IS_ERR(op_data))
 501                 RETURN(PTR_ERR(op_data));
 502
 503         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 504                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 505                  * to determine the security context for the file. So our fake
 506                  * dentry should be real enough for this purpose. */
 507                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 508                                               &op_data->op_file_secctx_name,
 509                                               &op_data->op_file_secctx,
 510                                               &op_data->op_file_secctx_size);
 511                 if (err < 0)
 512                         GOTO(out_op_data, err);
 513         }
 514
 515         op_data->op_cli_flags |= CLI_SET_MEA;
 516         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 517                         from_kuid(&init_user_ns, current_fsuid()),
 518                         from_kgid(&init_user_ns, current_fsgid()),
 519                         cfs_curproc_cap_pack(), 0, &request);
 520         if (err)
 521                 GOTO(out_request, err);
 522
 523         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 524
 525         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 526         if (err)
 527                 GOTO(out_inode, err);
 528
 529         dentry.d_inode = inode;
 530
 531         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 532                 inode_lock(inode);
 533                 err = security_inode_notifysecctx(inode,
 534                                                   op_data->op_file_secctx,
 535                                                   op_data->op_file_secctx_size);
 536                 inode_unlock(inode);
 537         } else {
 538                 err = ll_inode_init_security(&dentry, inode, parent);
 539         }
 540         if (err)
 541                 GOTO(out_inode, err);
 542
 543 out_inode:
 544         if (inode != NULL)
 545                 iput(inode);
 546 out_request:
 547         ptlrpc_req_finished(request);
 548 out_op_data:
 549         ll_finish_md_op_data(op_data);
 550
 551         return err;
 552 }
 553
 554 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 555                      int set_default)
 556 {
 557         struct ll_sb_info *sbi = ll_i2sbi(inode);
 558         struct md_op_data *op_data;
 559         struct ptlrpc_request *req = NULL;
 560         int rc = 0;
 561 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 562         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 563         struct obd_device *mgc = lsi->lsi_mgc;
 564 #endif
 565         int lum_size;
 566         ENTRY;
 567
 568         if (lump != NULL) {
 569                 /*
 570                  * This is coming from userspace, so should be in
 571                  * local endian.  But the MDS would like it in little
 572                  * endian, so we swab it before we send it.
 573                  */
 574                 switch (lump->lmm_magic) {
 575                 case LOV_USER_MAGIC_V1: {
 576                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 577                                 lustre_swab_lov_user_md_v1(lump);
 578                         lum_size = sizeof(struct lov_user_md_v1);
 579                         break;
 580                 }
 581                 case LOV_USER_MAGIC_V3: {
 582                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 583                                 lustre_swab_lov_user_md_v3(
 584                                         (struct lov_user_md_v3 *)lump);
 585                         lum_size = sizeof(struct lov_user_md_v3);
 586                         break;
 587                 }
 588                 case LOV_USER_MAGIC_COMP_V1: {
 589                         if (lump->lmm_magic !=
 590                             cpu_to_le32(LOV_USER_MAGIC_COMP_V1))
 591                                 lustre_swab_lov_comp_md_v1(
 592                                         (struct lov_comp_md_v1 *)lump);
 593                         lum_size = le32_to_cpu(
 594                                 ((struct lov_comp_md_v1 *)lump)->lcm_size);
 595                         break;
 596                 }
 597                 case LMV_USER_MAGIC: {
 598                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 599                                 lustre_swab_lmv_user_md(
 600                                         (struct lmv_user_md *)lump);
 601                         lum_size = sizeof(struct lmv_user_md);
 602                         break;
 603                 }
 604                 case LOV_USER_MAGIC_SPECIFIC: {
 605                         struct lov_user_md_v3 *v3 =
 606                                         (struct lov_user_md_v3 *)lump;
 607                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 608                                 RETURN(-EINVAL);
 609                         if (lump->lmm_magic !=
 610                             cpu_to_le32(LOV_USER_MAGIC_SPECIFIC)) {
 611                                 lustre_swab_lov_user_md_v3(v3);
 612                                 lustre_swab_lov_user_md_objects(v3->lmm_objects,
 613                                                 v3->lmm_stripe_count);
 614                         }
 615                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 616                                                     LOV_USER_MAGIC_SPECIFIC);
 617                         break;
 618                 }
 619                 default: {
 620                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 621                                         " %#08x != %#08x nor %#08x\n",
 622                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 623                                         LOV_USER_MAGIC_V3);
 624                         RETURN(-EINVAL);
 625                 }
 626                 }
 627         } else {
 628                 lum_size = sizeof(struct lov_user_md_v1);
 629         }
 630
 631         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 632                                      LUSTRE_OPC_ANY, NULL);
 633         if (IS_ERR(op_data))
 634                 RETURN(PTR_ERR(op_data));
 635
 636         /* swabbing is done in lov_setstripe() on server side */
 637         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 638         ll_finish_md_op_data(op_data);
 639         ptlrpc_req_finished(req);
 640         if (rc)
 641                 RETURN(rc);
 642
 643 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 644         /*
 645          * 2.9 server has stored filesystem default stripe in ROOT xattr,
 646          * and it's stored into system config for backward compatibility.
 647          *
 648          * In the following we use the fact that LOV_USER_MAGIC_V1 and
 649          * LOV_USER_MAGIC_V3 have the same initial fields so we do not
 650          * need the make the distiction between the 2 versions
 651          */
 652         if (set_default && mgc->u.cli.cl_mgc_mgsexp &&
 653             (lump == NULL ||
 654              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V1 ||
 655              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V3)) {
 656                 char *param = NULL;
 657                 char *buf;
 658
 659                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 660                 if (param == NULL)
 661                         GOTO(end, rc = -ENOMEM);
 662
 663                 buf = param;
 664                 /* Get fsname and assume devname to be -MDT0000. */
 665                 snprintf(buf, MGS_PARAM_MAXLEN, "%s-MDT0000.lov",
 666                          sbi->ll_fsname);
 667                 buf += strlen(buf);
 668
 669                 /* Set root stripesize */
 670                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripesize=%u",
 671                          lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 672                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 673                 if (rc)
 674                         GOTO(end, rc);
 675
 676                 /* Set root stripecount */
 677                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripecount=%hd",
 678                          lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 679                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 680                 if (rc)
 681                         GOTO(end, rc);
 682
 683                 /* Set root stripeoffset */
 684                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripeoffset=%hd",
 685                          lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 686                                 (typeof(lump->lmm_stripe_offset))(-1));
 687                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 688
 689 end:
 690                 if (param != NULL)
 691                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 692         }
 693 #endif
 694         RETURN(rc);
 695 }
 696
 697 /**
 698  * This function will be used to get default LOV/LMV/Default LMV
 699  * @valid will be used to indicate which stripe it will retrieve
 700  *      OBD_MD_MEA              LMV stripe EA
 701  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 702  *      otherwise               Default LOV EA.
 703  * Each time, it can only retrieve 1 stripe EA
 704  **/
 705 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 706                      struct ptlrpc_request **request, u64 valid)
 707 {
 708         struct ll_sb_info *sbi = ll_i2sbi(inode);
 709         struct mdt_body   *body;
 710         struct lov_mds_md *lmm = NULL;
 711         struct ptlrpc_request *req = NULL;
 712         int rc, lmm_size;
 713         struct md_op_data *op_data;
 714         ENTRY;
 715
 716         rc = ll_get_default_mdsize(sbi, &lmm_size);
 717         if (rc)
 718                 RETURN(rc);
 719
 720         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 721                                      0, lmm_size, LUSTRE_OPC_ANY,
 722                                      NULL);
 723         if (IS_ERR(op_data))
 724                 RETURN(PTR_ERR(op_data));
 725
 726         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 727         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 728         ll_finish_md_op_data(op_data);
 729         if (rc < 0) {
 730                 CDEBUG(D_INFO, "md_getattr failed on inode "
 731                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 732                 GOTO(out, rc);
 733         }
 734
 735         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 736         LASSERT(body != NULL);
 737
 738         lmm_size = body->mbo_eadatasize;
 739
 740         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 741             lmm_size == 0) {
 742                 GOTO(out, rc = -ENODATA);
 743         }
 744
 745         lmm = req_capsule_server_sized_get(&req->rq_pill,
 746                                            &RMF_MDT_MD, lmm_size);
 747         LASSERT(lmm != NULL);
 748
 749         /*
 750          * This is coming from the MDS, so is probably in
 751          * little endian.  We convert it to host endian before
 752          * passing it to userspace.
 753          */
 754         /* We don't swab objects for directories */
 755         switch (le32_to_cpu(lmm->lmm_magic)) {
 756         case LOV_MAGIC_V1:
 757                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 758                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 759                 break;
 760         case LOV_MAGIC_V3:
 761                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 762                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 763                 break;
 764         case LOV_MAGIC_COMP_V1:
 765                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 766                         lustre_swab_lov_comp_md_v1(
 767                                         (struct lov_comp_md_v1 *)lmm);
 768                 break;
 769         case LMV_MAGIC_V1:
 770                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 771                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 772                 break;
 773         case LMV_USER_MAGIC:
 774                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 775                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 776                 break;
 777         case LOV_USER_MAGIC_SPECIFIC: {
 778                 struct lov_user_md_v3 *v3 = (struct lov_user_md_v3 *)lmm;
 779
 780                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC)) {
 781                         lustre_swab_lov_user_md_v3(v3);
 782                         lustre_swab_lov_user_md_objects(v3->lmm_objects,
 783                                                         v3->lmm_stripe_count);
 784                         }
 785                 }
 786                 break;
 787         case LMV_MAGIC_FOREIGN: {
 788                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 789
 790                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 791                         __swab32s(&lfm->lfm_magic);
 792                         __swab32s(&lfm->lfm_length);
 793                         __swab32s(&lfm->lfm_type);
 794                         __swab32s(&lfm->lfm_flags);
 795                 }
 796                 break;
 797         }
 798         default:
 799                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 800                 rc = -EPROTO;
 801         }
 802 out:
 803         *plmm = lmm;
 804         *plmm_size = lmm_size;
 805         *request = req;
 806         return rc;
 807 }
 808
 809 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 810 {
 811         struct md_op_data       *op_data;
 812         int                     rc;
 813         int                     mdt_index;
 814         ENTRY;
 815
 816         OBD_ALLOC_PTR(op_data);
 817         if (op_data == NULL)
 818                 RETURN(-ENOMEM);
 819
 820         op_data->op_flags |= MF_GET_MDT_IDX;
 821         op_data->op_fid1 = *fid;
 822         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 823         mdt_index = op_data->op_mds;
 824         OBD_FREE_PTR(op_data);
 825         if (rc < 0)
 826                 RETURN(rc);
 827
 828         RETURN(mdt_index);
 829 }
 830
 831 /*
 832  *  Get MDT index for the inode.
 833  */
 834 int ll_get_mdt_idx(struct inode *inode)
 835 {
 836         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 837 }
 838
 839 /**
 840  * Generic handler to do any pre-copy work.
 841  *
 842  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 843  * first information for it that real work has started.
 844  *
 845  * Moreover, for a ARCHIVE request, it will sample the file data version and
 846  * store it in \a copy.
 847  *
 848  * \return 0 on success.
 849  */
 850 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 851 {
 852         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 853         struct hsm_progress_kernel       hpk;
 854         int                              rc = 0;
 855         int                              rc2;
 856         ENTRY;
 857
 858         /* Forge a hsm_progress based on data from copy. */
 859         hpk.hpk_fid = copy->hc_hai.hai_fid;
 860         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 861         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 862         hpk.hpk_extent.length = 0;
 863         hpk.hpk_flags = 0;
 864         hpk.hpk_errval = 0;
 865         hpk.hpk_data_version = 0;
 866
 867
 868         /* For archive request, we need to read the current file version. */
 869         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 870                 struct inode    *inode;
 871                 __u64            data_version = 0;
 872
 873                 /* Get inode for this fid */
 874                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 875                 if (IS_ERR(inode)) {
 876                         hpk.hpk_flags |= HP_FLAG_RETRY;
 877                         /* hpk_errval is >= 0 */
 878                         hpk.hpk_errval = -PTR_ERR(inode);
 879                         GOTO(progress, rc = PTR_ERR(inode));
 880                 }
 881
 882                 /* Read current file data version */
 883                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 884                 iput(inode);
 885                 if (rc != 0) {
 886                         CDEBUG(D_HSM, "Could not read file data version of "
 887                                       DFID" (rc = %d). Archive request ("
 888                                       "%#llx) could not be done.\n",
 889                                       PFID(&copy->hc_hai.hai_fid), rc,
 890                                       copy->hc_hai.hai_cookie);
 891                         hpk.hpk_flags |= HP_FLAG_RETRY;
 892                         /* hpk_errval must be >= 0 */
 893                         hpk.hpk_errval = -rc;
 894                         GOTO(progress, rc);
 895                 }
 896
 897                 /* Store in the hsm_copy for later copytool use.
 898                  * Always modified even if no lsm. */
 899                 copy->hc_data_version = data_version;
 900         }
 901
 902 progress:
 903         /* On error, the request should be considered as completed */
 904         if (hpk.hpk_errval > 0)
 905                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 906
 907         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 908                             &hpk, NULL);
 909
 910         /* Return first error */
 911         RETURN(rc != 0 ? rc : rc2);
 912 }
 913
 914 /**
 915  * Generic handler to do any post-copy work.
 916  *
 917  * It will send the last hsm_progress update to coordinator to inform it
 918  * that copy is finished and whether it was successful or not.
 919  *
 920  * Moreover,
 921  * - for ARCHIVE request, it will sample the file data version and compare it
 922  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 923  *   will be considered as failed.
 924  * - for RESTORE request, it will sample the file data version and send it to
 925  *   coordinator which is useful if the file was imported as 'released'.
 926  *
 927  * \return 0 on success.
 928  */
 929 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 930 {
 931         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 932         struct hsm_progress_kernel       hpk;
 933         int                              rc = 0;
 934         int                              rc2;
 935         ENTRY;
 936
 937         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 938         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 939          * initialized if copy_end was called with copy == NULL.
 940          */
 941
 942         /* Forge a hsm_progress based on data from copy. */
 943         hpk.hpk_fid = copy->hc_hai.hai_fid;
 944         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 945         hpk.hpk_extent = copy->hc_hai.hai_extent;
 946         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 947         hpk.hpk_errval = copy->hc_errval;
 948         hpk.hpk_data_version = 0;
 949
 950         /* For archive request, we need to check the file data was not changed.
 951          *
 952          * For restore request, we need to send the file data version, this is
 953          * useful when the file was created using hsm_import.
 954          */
 955         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 956              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 957             (copy->hc_errval == 0)) {
 958                 struct inode    *inode;
 959                 __u64            data_version = 0;
 960
 961                 /* Get lsm for this fid */
 962                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 963                 if (IS_ERR(inode)) {
 964                         hpk.hpk_flags |= HP_FLAG_RETRY;
 965                         /* hpk_errval must be >= 0 */
 966                         hpk.hpk_errval = -PTR_ERR(inode);
 967                         GOTO(progress, rc = PTR_ERR(inode));
 968                 }
 969
 970                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 971                 iput(inode);
 972                 if (rc) {
 973                         CDEBUG(D_HSM, "Could not read file data version. "
 974                                       "Request could not be confirmed.\n");
 975                         if (hpk.hpk_errval == 0)
 976                                 hpk.hpk_errval = -rc;
 977                         GOTO(progress, rc);
 978                 }
 979
 980                 /* Store in the hsm_copy for later copytool use.
 981                  * Always modified even if no lsm. */
 982                 hpk.hpk_data_version = data_version;
 983
 984                 /* File could have been stripped during archiving, so we need
 985                  * to check anyway. */
 986                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 987                     (copy->hc_data_version != data_version)) {
 988                         CDEBUG(D_HSM, "File data version mismatched. "
 989                               "File content was changed during archiving. "
 990                                DFID", start:%#llx current:%#llx\n",
 991                                PFID(&copy->hc_hai.hai_fid),
 992                                copy->hc_data_version, data_version);
 993                         /* File was changed, send error to cdt. Do not ask for
 994                          * retry because if a file is modified frequently,
 995                          * the cdt will loop on retried archive requests.
 996                          * The policy engine will ask for a new archive later
 997                          * when the file will not be modified for some tunable
 998                          * time */
 999                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
1000                         rc = -EBUSY;
1001                         /* hpk_errval must be >= 0 */
1002                         hpk.hpk_errval = -rc;
1003                         GOTO(progress, rc);
1004                 }
1005
1006         }
1007
1008 progress:
1009         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1010                             &hpk, NULL);
1011
1012         /* Return first error */
1013         RETURN(rc != 0 ? rc : rc2);
1014 }
1015
1016
1017 static int copy_and_ct_start(int cmd, struct obd_export *exp,
1018                              const struct lustre_kernelcomm __user *data)
1019 {
1020         struct lustre_kernelcomm *lk;
1021         struct lustre_kernelcomm *tmp;
1022         size_t size = sizeof(*lk);
1023         size_t new_size;
1024         int i;
1025         int rc;
1026
1027         /* copy data from userspace to get numbers of archive_id */
1028         OBD_ALLOC(lk, size);
1029         if (lk == NULL)
1030                 return -ENOMEM;
1031
1032         if (copy_from_user(lk, data, size))
1033                 GOTO(out_lk, rc = -EFAULT);
1034
1035         if (lk->lk_flags & LK_FLG_STOP)
1036                 goto do_ioctl;
1037
1038         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1039                 __u32 archive_mask = lk->lk_data_count;
1040                 int count;
1041
1042                 /* old hsm agent to old MDS */
1043                 if (!exp_connect_archive_id_array(exp))
1044                         goto do_ioctl;
1045
1046                 /* old hsm agent to new MDS */
1047                 lk->lk_flags |= LK_FLG_DATANR;
1048
1049                 if (archive_mask == 0)
1050                         goto do_ioctl;
1051
1052                 count = hweight32(archive_mask);
1053                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1054                 OBD_ALLOC(tmp, new_size);
1055                 if (tmp == NULL)
1056                         GOTO(out_lk, rc = -ENOMEM);
1057
1058                 memcpy(tmp, lk, size);
1059                 tmp->lk_data_count = count;
1060                 OBD_FREE(lk, size);
1061                 lk = tmp;
1062                 size = new_size;
1063
1064                 count = 0;
1065                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1066                         if ((1 << i) & archive_mask) {
1067                                 lk->lk_data[count] = i + 1;
1068                                 count++;
1069                         }
1070                 }
1071                 goto do_ioctl;
1072         }
1073
1074         /* new hsm agent to new mds */
1075         if (lk->lk_data_count > 0) {
1076                 new_size = offsetof(struct lustre_kernelcomm,
1077                                     lk_data[lk->lk_data_count]);
1078                 OBD_ALLOC(tmp, new_size);
1079                 if (tmp == NULL)
1080                         GOTO(out_lk, rc = -ENOMEM);
1081
1082                 OBD_FREE(lk, size);
1083                 lk = tmp;
1084                 size = new_size;
1085
1086                 if (copy_from_user(lk, data, size))
1087                         GOTO(out_lk, rc = -EFAULT);
1088         }
1089
1090         /* new hsm agent to old MDS */
1091         if (!exp_connect_archive_id_array(exp)) {
1092                 __u32 archives = 0;
1093
1094                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1095                         GOTO(out_lk, rc = -EINVAL);
1096
1097                 for (i = 0; i < lk->lk_data_count; i++) {
1098                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1099                                 rc = -EINVAL;
1100                                 CERROR("%s: archive id %d requested but only "
1101                                        "[0 - %zu] supported: rc = %d\n",
1102                                        exp->exp_obd->obd_name, lk->lk_data[i],
1103                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1104                                 GOTO(out_lk, rc);
1105                         }
1106
1107                         if (lk->lk_data[i] == 0) {
1108                                 archives = 0;
1109                                 break;
1110                         }
1111
1112                         archives |= (1 << (lk->lk_data[i] - 1));
1113                 }
1114                 lk->lk_flags &= ~LK_FLG_DATANR;
1115                 lk->lk_data_count = archives;
1116         }
1117 do_ioctl:
1118         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1119 out_lk:
1120         OBD_FREE(lk, size);
1121         return rc;
1122 }
1123
1124 static int check_owner(int type, int id)
1125 {
1126         switch (type) {
1127         case USRQUOTA:
1128                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1129                         return -EPERM;
1130                 break;
1131         case GRPQUOTA:
1132                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1133                         return -EPERM;
1134                 break;
1135         case PRJQUOTA:
1136                 break;
1137         }
1138         return 0;
1139 }
1140
1141 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1142 {
1143         int cmd = qctl->qc_cmd;
1144         int type = qctl->qc_type;
1145         int id = qctl->qc_id;
1146         int valid = qctl->qc_valid;
1147         int rc = 0;
1148         ENTRY;
1149
1150         switch (cmd) {
1151         case Q_SETQUOTA:
1152         case Q_SETINFO:
1153         case LUSTRE_Q_SETDEFAULT:
1154                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1155                         RETURN(-EPERM);
1156                 break;
1157         case Q_GETQUOTA:
1158         case LUSTRE_Q_GETDEFAULT:
1159                 if (check_owner(type, id) &&
1160                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1161                         RETURN(-EPERM);
1162                 break;
1163         case Q_GETINFO:
1164                 break;
1165         default:
1166                 CERROR("unsupported quotactl op: %#x\n", cmd);
1167                 RETURN(-ENOTSUPP);
1168         }
1169
1170         if (valid != QC_GENERAL) {
1171                 if (cmd == Q_GETINFO)
1172                         qctl->qc_cmd = Q_GETOINFO;
1173                 else if (cmd == Q_GETQUOTA)
1174                         qctl->qc_cmd = Q_GETOQUOTA;
1175                 else
1176                         RETURN(-EINVAL);
1177
1178                 switch (valid) {
1179                 case QC_MDTIDX:
1180                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1181                                            sizeof(*qctl), qctl, NULL);
1182                         break;
1183                 case QC_OSTIDX:
1184                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1185                                            sizeof(*qctl), qctl, NULL);
1186                         break;
1187                 case QC_UUID:
1188                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1189                                            sizeof(*qctl), qctl, NULL);
1190                         if (rc == -EAGAIN)
1191                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1192                                                    sbi->ll_dt_exp,
1193                                                    sizeof(*qctl), qctl, NULL);
1194                         break;
1195                 default:
1196                         rc = -EINVAL;
1197                         break;
1198                 }
1199
1200                 if (rc)
1201                         RETURN(rc);
1202
1203                 qctl->qc_cmd = cmd;
1204         } else {
1205                 struct obd_quotactl *oqctl;
1206
1207                 OBD_ALLOC_PTR(oqctl);
1208                 if (oqctl == NULL)
1209                         RETURN(-ENOMEM);
1210
1211                 QCTL_COPY(oqctl, qctl);
1212                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1213                 if (rc) {
1214                         OBD_FREE_PTR(oqctl);
1215                         RETURN(rc);
1216                 }
1217                 /* If QIF_SPACE is not set, client should collect the
1218                  * space usage from OSSs by itself */
1219                 if (cmd == Q_GETQUOTA &&
1220                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1221                     !oqctl->qc_dqblk.dqb_curspace) {
1222                         struct obd_quotactl *oqctl_tmp;
1223
1224                         OBD_ALLOC_PTR(oqctl_tmp);
1225                         if (oqctl_tmp == NULL)
1226                                 GOTO(out, rc = -ENOMEM);
1227
1228                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1229                         oqctl_tmp->qc_id = oqctl->qc_id;
1230                         oqctl_tmp->qc_type = oqctl->qc_type;
1231
1232                         /* collect space usage from OSTs */
1233                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1234                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1235                         if (!rc || rc == -EREMOTEIO) {
1236                                 oqctl->qc_dqblk.dqb_curspace =
1237                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1238                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1239                         }
1240
1241                         /* collect space & inode usage from MDTs */
1242                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1243                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1244                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1245                         if (!rc || rc == -EREMOTEIO) {
1246                                 oqctl->qc_dqblk.dqb_curspace +=
1247                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1248                                 oqctl->qc_dqblk.dqb_curinodes =
1249                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1250                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1251                         } else {
1252                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1253                         }
1254
1255                         OBD_FREE_PTR(oqctl_tmp);
1256                 }
1257 out:
1258                 QCTL_COPY(qctl, oqctl);
1259                 OBD_FREE_PTR(oqctl);
1260         }
1261
1262         RETURN(rc);
1263 }
1264
1265 /* This function tries to get a single name component,
1266  * to send to the server. No actual path traversal involved,
1267  * so we limit to NAME_MAX */
1268 static char *ll_getname(const char __user *filename)
1269 {
1270         int ret = 0, len;
1271         char *tmp;
1272
1273         OBD_ALLOC(tmp, NAME_MAX + 1);
1274
1275         if (!tmp)
1276                 return ERR_PTR(-ENOMEM);
1277
1278         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1279         if (len < 0)
1280                 ret = -ENOENT;
1281         else if (len > NAME_MAX)
1282                 ret = -ENAMETOOLONG;
1283
1284         if (ret) {
1285                 OBD_FREE(tmp, NAME_MAX + 1);
1286                 tmp =  ERR_PTR(ret);
1287         }
1288         return tmp;
1289 }
1290
1291 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1292
1293 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1294 {
1295         struct dentry *dentry = file_dentry(file);
1296         struct inode *inode = file_inode(file);
1297         struct ll_sb_info *sbi = ll_i2sbi(inode);
1298         struct obd_ioctl_data *data;
1299         int rc = 0;
1300         ENTRY;
1301
1302         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1303                PFID(ll_inode2fid(inode)), inode, cmd);
1304
1305         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1306         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1307                 return -ENOTTY;
1308
1309         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1310         switch (cmd) {
1311         case FS_IOC_GETFLAGS:
1312         case FS_IOC_SETFLAGS:
1313                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1314         case FSFILT_IOC_GETVERSION:
1315         case FS_IOC_GETVERSION:
1316                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1317         /* We need to special case any other ioctls we want to handle,
1318          * to send them to the MDS/OST as appropriate and to properly
1319          * network encode the arg field. */
1320         case FS_IOC_SETVERSION:
1321                 RETURN(-ENOTSUPP);
1322
1323         case LL_IOC_GET_MDTIDX: {
1324                 int mdtidx;
1325
1326                 mdtidx = ll_get_mdt_idx(inode);
1327                 if (mdtidx < 0)
1328                         RETURN(mdtidx);
1329
1330                 if (put_user((int)mdtidx, (int __user *)arg))
1331                         RETURN(-EFAULT);
1332
1333                 return 0;
1334         }
1335         case IOC_MDC_LOOKUP: {
1336                                      int namelen, len = 0;
1337                 char *buf = NULL;
1338                 char *filename;
1339
1340                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1341                 if (rc != 0)
1342                         RETURN(rc);
1343                 data = (void *)buf;
1344
1345                 filename = data->ioc_inlbuf1;
1346                 namelen = strlen(filename);
1347                 if (namelen < 1) {
1348                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1349                         GOTO(out_free, rc = -EINVAL);
1350                 }
1351
1352                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1353                 if (rc < 0) {
1354                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1355                                sbi->ll_fsname, namelen, filename, rc);
1356                         GOTO(out_free, rc);
1357                 }
1358 out_free:
1359                 OBD_FREE_LARGE(buf, len);
1360                 return rc;
1361         }
1362         case LL_IOC_LMV_SETSTRIPE: {
1363                 struct lmv_user_md  *lum;
1364                 char            *buf = NULL;
1365                 char            *filename;
1366                 int              namelen = 0;
1367                 int              lumlen = 0;
1368                 umode_t          mode;
1369                 int              len;
1370                 int              rc;
1371
1372                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1373                 if (rc)
1374                         RETURN(rc);
1375
1376                 data = (void *)buf;
1377                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1378                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1379                         GOTO(lmv_out_free, rc = -EINVAL);
1380
1381                 filename = data->ioc_inlbuf1;
1382                 namelen = data->ioc_inllen1;
1383
1384                 if (namelen < 1) {
1385                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1386                         GOTO(lmv_out_free, rc = -EINVAL);
1387                 }
1388                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1389                 lumlen = data->ioc_inllen2;
1390
1391                 if (!lmv_magic_supported(lum->lum_magic)) {
1392                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
1393                                lum->lum_magic, -EINVAL);
1394                         GOTO(lmv_out_free, rc = -EINVAL);
1395                 }
1396
1397                 if ((lum->lum_magic == LMV_USER_MAGIC ||
1398                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
1399                     lumlen < sizeof(*lum)) {
1400                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
1401                                filename, lumlen, lum->lum_magic, -EINVAL);
1402                         GOTO(lmv_out_free, rc = -EINVAL);
1403                 }
1404
1405                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
1406                     lumlen < sizeof(struct lmv_foreign_md)) {
1407                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1408                                filename, lum->lum_magic, lumlen, -EFAULT);
1409                         GOTO(lmv_out_free, rc = -EINVAL);
1410                 }
1411
1412 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1413                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1414 #else
1415                 mode = data->ioc_type;
1416 #endif
1417                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1418 lmv_out_free:
1419                 OBD_FREE_LARGE(buf, len);
1420                 RETURN(rc);
1421
1422         }
1423         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1424                 struct lmv_user_md        lum;
1425                 struct lmv_user_md __user *ulump =
1426                                         (struct lmv_user_md __user *)arg;
1427                 int                       rc;
1428
1429                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1430                         RETURN(-EFAULT);
1431
1432                 if (lum.lum_magic != LMV_USER_MAGIC)
1433                         RETURN(-EINVAL);
1434
1435                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1436
1437                 RETURN(rc);
1438         }
1439         case LL_IOC_LOV_SETSTRIPE_NEW:
1440         case LL_IOC_LOV_SETSTRIPE: {
1441                 struct lov_user_md_v3 *lumv3 = NULL;
1442                 struct lov_user_md_v1 lumv1;
1443                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1444                 struct lov_user_md_v1 __user *lumv1p =
1445                         (struct lov_user_md_v1 __user *)arg;
1446                 struct lov_user_md_v3 __user *lumv3p =
1447                         (struct lov_user_md_v3 __user *)arg;
1448                 int lum_size = 0;
1449
1450                 int set_default = 0;
1451
1452                 CLASSERT(sizeof(struct lov_user_md_v3) >
1453                          sizeof(struct lov_comp_md_v1));
1454                 CLASSERT(sizeof(*lumv3) == sizeof(*lumv3p));
1455                 /* first try with v1 which is smaller than v3 */
1456                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1457                         RETURN(-EFAULT);
1458
1459                 if (inode->i_sb->s_root == file_dentry(file))
1460                         set_default = 1;
1461
1462                 switch (lumv1.lmm_magic) {
1463                 case LOV_USER_MAGIC_V3:
1464                 case LOV_USER_MAGIC_SPECIFIC:
1465                         lum_size = ll_lov_user_md_size(&lumv1);
1466                         if (lum_size < 0)
1467                                 RETURN(lum_size);
1468                         OBD_ALLOC(lumv3, lum_size);
1469                         if (!lumv3)
1470                                 RETURN(-ENOMEM);
1471                         if (copy_from_user(lumv3, lumv3p, lum_size))
1472                                 GOTO(out, rc = -EFAULT);
1473                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1474                         break;
1475                 case LOV_USER_MAGIC_V1:
1476                         break;
1477                 default:
1478                         GOTO(out, rc = -ENOTSUPP);
1479                 }
1480
1481                 /* in v1 and v3 cases lumv1 points to data */
1482                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1483 out:
1484                 if (lumv3)
1485                         OBD_FREE(lumv3, lum_size);
1486                 RETURN(rc);
1487         }
1488         case LL_IOC_LMV_GETSTRIPE: {
1489                 struct lmv_user_md __user *ulmv =
1490                                         (struct lmv_user_md __user *)arg;
1491                 struct lmv_user_md      lum;
1492                 struct ptlrpc_request   *request = NULL;
1493                 union lmv_mds_md        *lmm = NULL;
1494                 int                     lmmsize;
1495                 u64                     valid = 0;
1496                 struct lmv_user_md      *tmp = NULL;
1497                 int                     mdt_index;
1498                 int                     lum_size;
1499                 int                     stripe_count;
1500                 int                     max_stripe_count;
1501                 int                     i;
1502                 int                     rc;
1503
1504                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1505                         RETURN(-EFAULT);
1506
1507                 max_stripe_count = lum.lum_stripe_count;
1508                 /* lum_magic will indicate which stripe the ioctl will like
1509                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1510                  * is for default LMV stripe */
1511                 if (lum.lum_magic == LMV_MAGIC_V1)
1512                         valid |= OBD_MD_MEA;
1513                 else if (lum.lum_magic == LMV_USER_MAGIC)
1514                         valid |= OBD_MD_DEFAULT_MEA;
1515                 else
1516                         RETURN(-EINVAL);
1517
1518                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1519                                       valid);
1520                 if (rc != 0)
1521                         GOTO(finish_req, rc);
1522
1523                 /* Get default LMV EA */
1524                 if (lum.lum_magic == LMV_USER_MAGIC) {
1525                         if (lmmsize > sizeof(*ulmv))
1526                                 GOTO(finish_req, rc = -EINVAL);
1527
1528                         if (copy_to_user(ulmv, lmm, lmmsize))
1529                                 GOTO(finish_req, rc = -EFAULT);
1530
1531                         GOTO(finish_req, rc);
1532                 }
1533
1534                 /* if foreign LMV case, fake stripes number */
1535                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1536                         struct lmv_foreign_md *lfm;
1537
1538                         lfm = (struct lmv_foreign_md *)lmm;
1539                         if (lfm->lfm_length < XATTR_SIZE_MAX -
1540                             offsetof(typeof(*lfm), lfm_value)) {
1541                                 __u32 size = lfm->lfm_length +
1542                                              offsetof(typeof(*lfm), lfm_value);
1543
1544                                 stripe_count = lmv_foreign_to_md_stripes(size);
1545                         } else {
1546                                 CERROR("invalid %d foreign size returned\n",
1547                                             lfm->lfm_length);
1548                                 return -EINVAL;
1549                         }
1550                 } else {
1551                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
1552                 }
1553                 if (max_stripe_count < stripe_count) {
1554                         lum.lum_stripe_count = stripe_count;
1555                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1556                                 GOTO(finish_req, rc = -EFAULT);
1557                         GOTO(finish_req, rc = -E2BIG);
1558                 }
1559
1560                 /* enough room on user side and foreign case */
1561                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1562                         struct lmv_foreign_md *lfm;
1563                         __u32 size;
1564
1565                         lfm = (struct lmv_foreign_md *)lmm;
1566                         size = lfm->lfm_length +
1567                                offsetof(struct lmv_foreign_md, lfm_value);
1568                         if (copy_to_user(ulmv, lfm, size))
1569                                 GOTO(finish_req, rc = -EFAULT);
1570                         GOTO(finish_req, rc);
1571                 }
1572
1573                 lum_size = lmv_user_md_size(stripe_count,
1574                                             LMV_USER_MAGIC_SPECIFIC);
1575                 OBD_ALLOC(tmp, lum_size);
1576                 if (tmp == NULL)
1577                         GOTO(finish_req, rc = -ENOMEM);
1578
1579                 mdt_index = ll_get_mdt_idx(inode);
1580                 if (mdt_index < 0)
1581                         GOTO(out_tmp, rc = -ENOMEM);
1582
1583                 tmp->lum_magic = LMV_MAGIC_V1;
1584                 tmp->lum_stripe_count = 0;
1585                 tmp->lum_stripe_offset = mdt_index;
1586                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1587                 for (i = 0; i < stripe_count; i++) {
1588                         struct lu_fid   fid;
1589
1590                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1591                         if (fid_is_sane(&fid)) {
1592                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1593                                 if (mdt_index < 0)
1594                                         GOTO(out_tmp, rc = mdt_index);
1595
1596                                 tmp->lum_objects[i].lum_mds = mdt_index;
1597                                 tmp->lum_objects[i].lum_fid = fid;
1598                         }
1599
1600                         tmp->lum_stripe_count++;
1601                 }
1602
1603                 if (copy_to_user(ulmv, tmp, lum_size))
1604                         GOTO(out_tmp, rc = -EFAULT);
1605 out_tmp:
1606                 OBD_FREE(tmp, lum_size);
1607 finish_req:
1608                 ptlrpc_req_finished(request);
1609                 return rc;
1610         }
1611
1612         case LL_IOC_REMOVE_ENTRY: {
1613                 char            *filename = NULL;
1614                 int              namelen = 0;
1615                 int              rc;
1616
1617                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1618                  * unsupported server, which might crash the server(LU-2730),
1619                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1620                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1621                  * server will support REINT_RMENTRY XXX*/
1622                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1623                         RETURN(-ENOTSUPP);
1624
1625                 filename = ll_getname((const char __user *)arg);
1626                 if (IS_ERR(filename))
1627                         RETURN(PTR_ERR(filename));
1628
1629                 namelen = strlen(filename);
1630                 if (namelen < 1)
1631                         GOTO(out_rmdir, rc = -EINVAL);
1632
1633                 rc = ll_rmdir_entry(inode, filename, namelen);
1634 out_rmdir:
1635                 if (filename)
1636                         ll_putname(filename);
1637                 RETURN(rc);
1638         }
1639         case LL_IOC_LOV_SWAP_LAYOUTS:
1640                 RETURN(-EPERM);
1641         case IOC_OBD_STATFS:
1642                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1643         case LL_IOC_LOV_GETSTRIPE:
1644         case LL_IOC_LOV_GETSTRIPE_NEW:
1645         case LL_IOC_MDC_GETINFO:
1646         case IOC_MDC_GETFILEINFO:
1647         case IOC_MDC_GETFILESTRIPE: {
1648                 struct ptlrpc_request *request = NULL;
1649                 struct lov_user_md __user *lump;
1650                 struct lov_mds_md *lmm = NULL;
1651                 struct mdt_body *body;
1652                 char *filename = NULL;
1653                 int lmmsize;
1654
1655                 if (cmd == IOC_MDC_GETFILEINFO ||
1656                     cmd == IOC_MDC_GETFILESTRIPE) {
1657                         filename = ll_getname((const char __user *)arg);
1658                         if (IS_ERR(filename))
1659                                 RETURN(PTR_ERR(filename));
1660
1661                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1662                                                       &lmmsize, &request);
1663                 } else {
1664                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1665                                               &request, 0);
1666                 }
1667
1668                 if (request) {
1669                         body = req_capsule_server_get(&request->rq_pill,
1670                                                       &RMF_MDT_BODY);
1671                         LASSERT(body != NULL);
1672                 } else {
1673                         GOTO(out_req, rc);
1674                 }
1675
1676                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1677                                        cmd == LL_IOC_MDC_GETINFO)) {
1678                         lmmsize = 0;
1679                         rc = 0;
1680                 }
1681
1682                 if (rc < 0)
1683                         GOTO(out_req, rc);
1684
1685                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1686                     cmd == LL_IOC_LOV_GETSTRIPE ||
1687                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1688                         lump = (struct lov_user_md __user *)arg;
1689                 } else {
1690                         struct lov_user_mds_data __user *lmdp;
1691                         lmdp = (struct lov_user_mds_data __user *)arg;
1692                         lump = &lmdp->lmd_lmm;
1693                 }
1694
1695                 if (lmmsize == 0) {
1696                         /* If the file has no striping then zero out *lump so
1697                          * that the caller isn't confused by garbage. */
1698                         if (clear_user(lump, sizeof(*lump)))
1699                                 GOTO(out_req, rc = -EFAULT);
1700                 } else if (copy_to_user(lump, lmm, lmmsize)) {
1701                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1702                                 GOTO(out_req, rc = -EFAULT);
1703                         rc = -EOVERFLOW;
1704                 }
1705
1706                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1707                         struct lov_user_mds_data __user *lmdp;
1708                         lstat_t st = { 0 };
1709
1710                         st.st_dev       = inode->i_sb->s_dev;
1711                         st.st_mode      = body->mbo_mode;
1712                         st.st_nlink     = body->mbo_nlink;
1713                         st.st_uid       = body->mbo_uid;
1714                         st.st_gid       = body->mbo_gid;
1715                         st.st_rdev      = body->mbo_rdev;
1716                         st.st_size      = body->mbo_size;
1717                         st.st_blksize   = PAGE_SIZE;
1718                         st.st_blocks    = body->mbo_blocks;
1719                         st.st_atime     = body->mbo_atime;
1720                         st.st_mtime     = body->mbo_mtime;
1721                         st.st_ctime     = body->mbo_ctime;
1722                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1723                                                 sbi->ll_flags &
1724                                                 LL_SBI_32BIT_API);
1725
1726                         lmdp = (struct lov_user_mds_data __user *)arg;
1727                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1728                                 GOTO(out_req, rc = -EFAULT);
1729                 }
1730
1731                 EXIT;
1732         out_req:
1733                 ptlrpc_req_finished(request);
1734                 if (filename)
1735                         ll_putname(filename);
1736                 return rc;
1737         }
1738         case OBD_IOC_QUOTACTL: {
1739                 struct if_quotactl *qctl;
1740
1741                 OBD_ALLOC_PTR(qctl);
1742                 if (!qctl)
1743                         RETURN(-ENOMEM);
1744
1745                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1746                         GOTO(out_quotactl, rc = -EFAULT);
1747
1748                 rc = quotactl_ioctl(sbi, qctl);
1749
1750                 if (rc == 0 &&
1751                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1752                         rc = -EFAULT;
1753
1754         out_quotactl:
1755                 OBD_FREE_PTR(qctl);
1756                 RETURN(rc);
1757         }
1758         case OBD_IOC_GETDTNAME:
1759         case OBD_IOC_GETMDNAME:
1760                 RETURN(ll_get_obd_name(inode, cmd, arg));
1761         case LL_IOC_FLUSHCTX:
1762                 RETURN(ll_flush_ctx(inode));
1763         case LL_IOC_GETOBDCOUNT: {
1764                 u32 count, vallen;
1765                 struct obd_export *exp;
1766
1767                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1768                         RETURN(-EFAULT);
1769
1770                 /* get ost count when count is zero, get mdt count otherwise */
1771                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1772                 vallen = sizeof(count);
1773                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1774                                   KEY_TGT_COUNT, &vallen, &count);
1775                 if (rc) {
1776                         CERROR("get target count failed: %d\n", rc);
1777                         RETURN(rc);
1778                 }
1779
1780                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1781                         RETURN(-EFAULT);
1782
1783                 RETURN(0);
1784         }
1785         case LL_IOC_PATH2FID:
1786                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1787                                      sizeof(struct lu_fid)))
1788                         RETURN(-EFAULT);
1789                 RETURN(0);
1790         case LL_IOC_GET_CONNECT_FLAGS: {
1791                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1792                                      (void __user *)arg));
1793         }
1794         case OBD_IOC_FID2PATH:
1795                 RETURN(ll_fid2path(inode, (void __user *)arg));
1796         case LL_IOC_GETPARENT:
1797                 RETURN(ll_getparent(file, (void __user *)arg));
1798         case LL_IOC_FID2MDTIDX: {
1799                 struct obd_export *exp = ll_i2mdexp(inode);
1800                 struct lu_fid     fid;
1801                 __u32             index;
1802
1803                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1804                                    sizeof(fid)))
1805                         RETURN(-EFAULT);
1806
1807                 /* Call mdc_iocontrol */
1808                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1809                                    (__u32 __user *)&index);
1810                 if (rc != 0)
1811                         RETURN(rc);
1812
1813                 RETURN(index);
1814         }
1815         case LL_IOC_HSM_REQUEST: {
1816                 struct hsm_user_request *hur;
1817                 ssize_t                  totalsize;
1818
1819                 OBD_ALLOC_PTR(hur);
1820                 if (hur == NULL)
1821                         RETURN(-ENOMEM);
1822
1823                 /* We don't know the true size yet; copy the fixed-size part */
1824                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1825                         OBD_FREE_PTR(hur);
1826                         RETURN(-EFAULT);
1827                 }
1828
1829                 /* Compute the whole struct size */
1830                 totalsize = hur_len(hur);
1831                 OBD_FREE_PTR(hur);
1832                 if (totalsize < 0)
1833                         RETURN(-E2BIG);
1834
1835                 /* Final size will be more than double totalsize */
1836                 if (totalsize >= MDS_MAXREQSIZE / 3)
1837                         RETURN(-E2BIG);
1838
1839                 OBD_ALLOC_LARGE(hur, totalsize);
1840                 if (hur == NULL)
1841                         RETURN(-ENOMEM);
1842
1843                 /* Copy the whole struct */
1844                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1845                         GOTO(out_hur, rc = -EFAULT);
1846
1847                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1848                         const struct lu_fid *fid;
1849                         struct inode *f;
1850                         int i;
1851
1852                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1853                                 fid = &hur->hur_user_item[i].hui_fid;
1854                                 f = search_inode_for_lustre(inode->i_sb, fid);
1855                                 if (IS_ERR(f)) {
1856                                         rc = PTR_ERR(f);
1857                                         break;
1858                                 }
1859
1860                                 rc = ll_hsm_release(f);
1861                                 iput(f);
1862                                 if (rc != 0)
1863                                         break;
1864                         }
1865                 } else {
1866                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1867                                            hur, NULL);
1868                 }
1869
1870 out_hur:
1871                 OBD_FREE_LARGE(hur, totalsize);
1872
1873                 RETURN(rc);
1874         }
1875         case LL_IOC_HSM_PROGRESS: {
1876                 struct hsm_progress_kernel      hpk;
1877                 struct hsm_progress             hp;
1878
1879                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1880                         RETURN(-EFAULT);
1881
1882                 hpk.hpk_fid = hp.hp_fid;
1883                 hpk.hpk_cookie = hp.hp_cookie;
1884                 hpk.hpk_extent = hp.hp_extent;
1885                 hpk.hpk_flags = hp.hp_flags;
1886                 hpk.hpk_errval = hp.hp_errval;
1887                 hpk.hpk_data_version = 0;
1888
1889                 /* File may not exist in Lustre; all progress
1890                  * reported to Lustre root */
1891                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1892                                    NULL);
1893                 RETURN(rc);
1894         }
1895         case LL_IOC_HSM_CT_START:
1896                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1897                         RETURN(-EPERM);
1898
1899                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
1900                                        (struct lustre_kernelcomm __user *)arg);
1901                 RETURN(rc);
1902
1903         case LL_IOC_HSM_COPY_START: {
1904                 struct hsm_copy *copy;
1905                 int              rc;
1906
1907                 OBD_ALLOC_PTR(copy);
1908                 if (copy == NULL)
1909                         RETURN(-ENOMEM);
1910                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1911                         OBD_FREE_PTR(copy);
1912                         RETURN(-EFAULT);
1913                 }
1914
1915                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1916                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1917                         rc = -EFAULT;
1918
1919                 OBD_FREE_PTR(copy);
1920                 RETURN(rc);
1921         }
1922         case LL_IOC_HSM_COPY_END: {
1923                 struct hsm_copy *copy;
1924                 int              rc;
1925
1926                 OBD_ALLOC_PTR(copy);
1927                 if (copy == NULL)
1928                         RETURN(-ENOMEM);
1929                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1930                         OBD_FREE_PTR(copy);
1931                         RETURN(-EFAULT);
1932                 }
1933
1934                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1935                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1936                         rc = -EFAULT;
1937
1938                 OBD_FREE_PTR(copy);
1939                 RETURN(rc);
1940         }
1941         case LL_IOC_MIGRATE: {
1942                 struct lmv_user_md *lum;
1943                 char *buf = NULL;
1944                 int len;
1945                 char *filename;
1946                 int namelen = 0;
1947                 int rc;
1948
1949                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1950                 if (rc)
1951                         RETURN(rc);
1952
1953                 data = (struct obd_ioctl_data *)buf;
1954                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1955                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1956                         GOTO(migrate_free, rc = -EINVAL);
1957
1958                 filename = data->ioc_inlbuf1;
1959                 namelen = data->ioc_inllen1;
1960
1961                 if (namelen < 1 || namelen != strlen(filename) + 1) {
1962                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1963                         GOTO(migrate_free, rc = -EINVAL);
1964                 }
1965
1966                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1967                 if (lum->lum_magic != LMV_USER_MAGIC &&
1968                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
1969                         rc = -EINVAL;
1970                         CERROR("%s: wrong lum magic %x: rc = %d\n",
1971                                filename, lum->lum_magic, rc);
1972                         GOTO(migrate_free, rc);
1973                 }
1974
1975                 rc = ll_migrate(inode, file, lum, filename);
1976 migrate_free:
1977                 OBD_FREE_LARGE(buf, len);
1978
1979                 RETURN(rc);
1980         }
1981         case LL_IOC_FSGETXATTR:
1982                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
1983         case LL_IOC_FSSETXATTR:
1984                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
1985         case LL_IOC_PCC_DETACH_BY_FID: {
1986                 struct lu_pcc_detach_fid *detach;
1987                 struct lu_fid *fid;
1988                 struct inode *inode2;
1989                 unsigned long ino;
1990
1991                 OBD_ALLOC_PTR(detach);
1992                 if (detach == NULL)
1993                         RETURN(-ENOMEM);
1994
1995                 if (copy_from_user(detach,
1996                                    (const struct lu_pcc_detach_fid __user *)arg,
1997                                    sizeof(*detach)))
1998                         GOTO(out_detach, rc = -EFAULT);
1999
2000                 fid = &detach->pccd_fid;
2001                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2002                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2003                 if (inode2 == NULL)
2004                         /* Target inode is not in inode cache, and PCC file
2005                          * has aleady released, return immdiately.
2006                          */
2007                         GOTO(out_detach, rc = 0);
2008
2009                 if (!S_ISREG(inode2->i_mode))
2010                         GOTO(out_iput, rc = -EINVAL);
2011
2012                 if (!inode_owner_or_capable(inode2))
2013                         GOTO(out_iput, rc = -EPERM);
2014
2015                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2016 out_iput:
2017                 iput(inode2);
2018 out_detach:
2019                 OBD_FREE_PTR(detach);
2020                 RETURN(rc);
2021         }
2022         default:
2023                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
2024                                      (void __user *)arg));
2025         }
2026 }
2027
2028 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2029 {
2030         struct inode *inode = file->f_mapping->host;
2031         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2032         struct ll_sb_info *sbi = ll_i2sbi(inode);
2033         int api32 = ll_need_32bit_api(sbi);
2034         loff_t ret = -EINVAL;
2035         ENTRY;
2036
2037         inode_lock(inode);
2038         switch (origin) {
2039                 case SEEK_SET:
2040                         break;
2041                 case SEEK_CUR:
2042                         offset += file->f_pos;
2043                         break;
2044                 case SEEK_END:
2045                         if (offset > 0)
2046                                 GOTO(out, ret);
2047                         if (api32)
2048                                 offset += LL_DIR_END_OFF_32BIT;
2049                         else
2050                                 offset += LL_DIR_END_OFF;
2051                         break;
2052                 default:
2053                         GOTO(out, ret);
2054         }
2055
2056         if (offset >= 0 &&
2057             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2058              (!api32 && offset <= LL_DIR_END_OFF))) {
2059                 if (offset != file->f_pos) {
2060                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2061                             (!api32 && offset == LL_DIR_END_OFF))
2062                                 fd->lfd_pos = MDS_DIR_END_OFF;
2063                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
2064                                 fd->lfd_pos = offset << 32;
2065                         else
2066                                 fd->lfd_pos = offset;
2067                         file->f_pos = offset;
2068                         file->f_version = 0;
2069                 }
2070                 ret = offset;
2071         }
2072         GOTO(out, ret);
2073
2074 out:
2075         inode_unlock(inode);
2076         return ret;
2077 }
2078
2079 static int ll_dir_open(struct inode *inode, struct file *file)
2080 {
2081         ENTRY;
2082         RETURN(ll_file_open(inode, file));
2083 }
2084
2085 static int ll_dir_release(struct inode *inode, struct file *file)
2086 {
2087         ENTRY;
2088         RETURN(ll_file_release(inode, file));
2089 }
2090
2091 const struct file_operations ll_dir_operations = {
2092         .llseek         = ll_dir_seek,
2093         .open           = ll_dir_open,
2094         .release        = ll_dir_release,
2095         .read           = generic_read_dir,
2096 #ifdef HAVE_DIR_CONTEXT
2097         .iterate        = ll_iterate,
2098 #else
2099         .readdir        = ll_readdir,
2100 #endif
2101         .unlocked_ioctl = ll_dir_ioctl,
2102         .fsync          = ll_fsync,
2103 };