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  *
  31  * lustre/llite/dir.c
  32  *
  33  * Directory code for lustre client.
  34  */
  35
  36 #include <linux/fs.h>
  37 #include <linux/pagemap.h>
  38 #include <linux/mm.h>
  39 #include <linux/version.h>
  40 #include <linux/security.h>
  41 #include <linux/user_namespace.h>
  42 #include <linux/uidgid.h>
  43 #include <linux/uaccess.h>
  44 #include <linux/buffer_head.h>   // for wait_on_buffer
  45 #include <linux/pagevec.h>
  46
  47 #define DEBUG_SUBSYSTEM S_LLITE
  48
  49 #include <obd_support.h>
  50 #include <obd_class.h>
  51 #include <uapi/linux/lustre/lustre_ioctl.h>
  52 #include <lustre_lib.h>
  53 #include <lustre_dlm.h>
  54 #include <lustre_compat.h>
  55 #include <lustre_fid.h>
  56 #include <lustre_kernelcomm.h>
  57 #include <lustre_swab.h>
  58 #include <lustre_quota.h>
  59 #include <libcfs/libcfs_crypto.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  * Proposed (unimplimented) solution to index uniqueness problem is to
 108  * not cache overflow pages.  Instead, when page hash collision is
 109  * detected, all overflow pages from emerging chain should be
 110  * immediately requested from the server and placed in a special data
 111  * structure.  This data structure can be used by ll_readdir() to
 112  * process entries from overflow pages.  When readdir invocation
 113  * finishes, overflow pages are discarded.  If page hash collision chain
 114  * weren't completely processed, next call to readdir will again detect
 115  * page hash collision, again read overflow pages in, process next
 116  * portion of entries and again discard the pages.  This is not as
 117  * wasteful as it looks, because, given reasonable hash, page hash
 118  * collisions are extremely rare.
 119  *
 120  * 1. directory positioning
 121  *
 122  * When seekdir(hash) is called.
 123  *
 124  * seekdir() sets the location in the directory stream from which the next
 125  * readdir() call will start. mdc_page_locate() is used to find page with
 126  * starting hash and will issue RPC to fetch that page. If there is a hash
 127  * collision the concerned page is removed.
 128  *
 129  *
 130  * Server.
 131  *
 132  * identification of and access to overflow pages
 133  *
 134  * page format
 135  *
 136  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 137  * a header lu_dirpage which describes the start/end hash, and whether this
 138  * page is empty (contains no dir entry) or hash collide with next page.
 139  * After client receives reply, several pages will be integrated into dir page
 140  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 141  * lu_dirpage for this integrated page will be adjusted. See
 142  * mdc_adjust_dirpages().
 143  *
 144  */
 145 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 146                              __u64 offset, int *partial_readdir_rc)
 147 {
 148         struct md_readdir_info mrinfo = {
 149                                         .mr_blocking_ast = ll_md_blocking_ast };
 150         struct page *page;
 151         int rc;
 152
 153         rc = md_read_page(ll_i2mdexp(dir), op_data, &mrinfo, offset, &page);
 154         if (rc != 0)
 155                 return ERR_PTR(rc);
 156
 157         if (partial_readdir_rc && mrinfo.mr_partial_readdir_rc)
 158                 *partial_readdir_rc = mrinfo.mr_partial_readdir_rc;
 159
 160         return page;
 161 }
 162
 163 void ll_release_page(struct inode *inode, struct page *page,
 164                      bool remove)
 165 {
 166         kunmap(page);
 167
 168         /* Always remove the page for striped dir, because the page is
 169          * built from temporarily in LMV layer */
 170         if (inode && ll_dir_striped(inode)) {
 171                 __free_page(page);
 172                 return;
 173         }
 174
 175         if (remove) {
 176                 lock_page(page);
 177                 if (likely(page->mapping != NULL))
 178                         cfs_delete_from_page_cache(page);
 179                 unlock_page(page);
 180         }
 181         put_page(page);
 182 }
 183
 184 #ifdef HAVE_DIR_CONTEXT
 185 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 186                 struct dir_context *ctx, int *partial_readdir_rc)
 187 {
 188 #else
 189 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 190                 void *cookie, filldir_t filldir, int *partial_readdir_rc)
 191 {
 192 #endif
 193         struct ll_sb_info *sbi = ll_i2sbi(inode);
 194         __u64 pos = *ppos;
 195         bool is_api32 = ll_need_32bit_api(sbi);
 196         bool is_hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
 197         struct page *page;
 198         bool done = false;
 199         struct llcrypt_str lltr = LLTR_INIT(NULL, 0);
 200         int rc = 0;
 201         ENTRY;
 202
 203         if (IS_ENCRYPTED(inode)) {
 204                 rc = llcrypt_fname_alloc_buffer(inode, NAME_MAX, &lltr);
 205                 if (rc < 0)
 206                         RETURN(rc);
 207         }
 208
 209         page = ll_get_dir_page(inode, op_data, pos, partial_readdir_rc);
 210
 211         while (rc == 0 && !done) {
 212                 struct lu_dirpage *dp;
 213                 struct lu_dirent  *ent;
 214                 __u64 hash;
 215                 __u64 next;
 216
 217                 if (IS_ERR(page)) {
 218                         rc = PTR_ERR(page);
 219                         break;
 220                 }
 221
 222                 hash = MDS_DIR_END_OFF;
 223                 dp = page_address(page);
 224                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 225                      ent = lu_dirent_next(ent)) {
 226                         __u16          type;
 227                         int            namelen;
 228                         struct lu_fid  fid;
 229                         __u64          lhash;
 230                         __u64          ino;
 231
 232                         hash = le64_to_cpu(ent->lde_hash);
 233                         if (hash < pos) /* Skip until we find target hash */
 234                                 continue;
 235
 236                         namelen = le16_to_cpu(ent->lde_namelen);
 237                         if (namelen == 0) /* Skip dummy record */
 238                                 continue;
 239
 240                         if (is_api32 && is_hash64)
 241                                 lhash = hash >> 32;
 242                         else
 243                                 lhash = hash;
 244                         fid_le_to_cpu(&fid, &ent->lde_fid);
 245                         ino = cl_fid_build_ino(&fid, is_api32);
 246                         type = S_DT(lu_dirent_type_get(ent));
 247                         /* For ll_nfs_get_name_filldir(), it will try to access
 248                          * 'ent' through 'lde_name', so the parameter 'name'
 249                          * for 'filldir()' must be part of the 'ent'. */
 250 #ifdef HAVE_DIR_CONTEXT
 251                         ctx->pos = lhash;
 252                         if (!IS_ENCRYPTED(inode)) {
 253                                 done = !dir_emit(ctx, ent->lde_name, namelen,
 254                                                  ino, type);
 255                         } else {
 256                                 /* Directory is encrypted */
 257                                 int save_len = lltr.len;
 258                                 struct llcrypt_str de_name =
 259                                         LLTR_INIT(ent->lde_name, namelen);
 260
 261                                 rc = ll_fname_disk_to_usr(inode, 0, 0, &de_name,
 262                                                           &lltr, &fid);
 263                                 de_name = lltr;
 264                                 lltr.len = save_len;
 265                                 if (rc) {
 266                                         done = 1;
 267                                         break;
 268                                 }
 269                                 done = !dir_emit(ctx, de_name.name, de_name.len,
 270                                                  ino, type);
 271                         }
 272 #else
 273                         /* HAVE_DIR_CONTEXT is defined from kernel 3.11, whereas
 274                          * IS_ENCRYPTED is brought by kernel 4.14.
 275                          * So there is no need to handle encryption case here.
 276                          */
 277                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 278                                        ino, type);
 279 #endif
 280                 }
 281
 282                 if (done) {
 283                         pos = hash;
 284                         ll_release_page(inode, page, false);
 285                         break;
 286                 }
 287
 288                 next = le64_to_cpu(dp->ldp_hash_end);
 289                 pos = next;
 290                 if (pos == MDS_DIR_END_OFF) {
 291                         /* End of directory reached. */
 292                         done = 1;
 293                         ll_release_page(inode, page, false);
 294                 } else {
 295                         /* Normal case: continue to the next page.*/
 296                         ll_release_page(inode, page,
 297                                         le32_to_cpu(dp->ldp_flags) &
 298                                         LDF_COLLIDE);
 299                         next = pos;
 300                         page = ll_get_dir_page(inode, op_data, pos,
 301                                                partial_readdir_rc);
 302                 }
 303         }
 304 #ifdef HAVE_DIR_CONTEXT
 305         ctx->pos = pos;
 306 #else
 307         *ppos = pos;
 308 #endif
 309         llcrypt_fname_free_buffer(&lltr);
 310         RETURN(rc);
 311 }
 312
 313 #ifdef HAVE_DIR_CONTEXT
 314 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 315 #else
 316 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 317 #endif
 318 {
 319         struct inode *inode = file_inode(filp);
 320         struct ll_file_data *lfd = filp->private_data;
 321         struct ll_sb_info *sbi = ll_i2sbi(inode);
 322         bool hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
 323         int api32 = ll_need_32bit_api(sbi);
 324         struct md_op_data *op_data;
 325         struct lu_fid pfid = { 0 };
 326         ktime_t kstart = ktime_get();
 327         /* result of possible partial readdir */
 328         int partial_readdir_rc = 0;
 329         __u64 pos;
 330         int rc;
 331
 332         ENTRY;
 333
 334         LASSERT(lfd != NULL);
 335         pos = lfd->lfd_pos;
 336
 337         CDEBUG(D_VFSTRACE,
 338                "VFS Op:inode="DFID"(%p) pos/size%lu/%llu 32bit_api %d\n",
 339                PFID(ll_inode2fid(inode)),
 340                inode, (unsigned long)pos, i_size_read(inode), api32);
 341
 342         if (IS_ENCRYPTED(inode)) {
 343                 rc = llcrypt_prepare_readdir(inode);
 344                 if (rc && rc != -ENOKEY)
 345                         GOTO(out, rc);
 346         }
 347
 348         if (pos == MDS_DIR_END_OFF)
 349                 /* end-of-file. */
 350                 GOTO(out, rc = 0);
 351
 352         if (unlikely(ll_dir_striped(inode))) {
 353                 struct dentry *parent = dget_parent(file_dentry(filp));
 354                 struct inode *i_dir = d_inode(parent);
 355
 356                 /* Only needed for striped dir to fill ..see lmv_read_page() */
 357                 if (i_dir) {
 358                         struct obd_export *exp = ll_i2mdexp(i_dir);
 359                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 360
 361                         if (ll_have_md_lock(exp, i_dir, &ibits, LCK_MINMODE))
 362                                 pfid = *ll_inode2fid(i_dir);
 363                 }
 364                 dput(parent);
 365
 366                 /* If it can not find in cache, do lookup .. on the master
 367                  * object */
 368                 if (fid_is_zero(&pfid)) {
 369                         rc = ll_dir_get_parent_fid(inode, &pfid);
 370                         if (rc != 0)
 371                                 RETURN(rc);
 372                 }
 373         }
 374
 375         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 376                                      LUSTRE_OPC_ANY, inode);
 377         if (IS_ERR(op_data))
 378                 GOTO(out, rc = PTR_ERR(op_data));
 379
 380         /* foreign dirs are browsed out of Lustre */
 381         if (unlikely(lmv_dir_foreign(op_data->op_lso1))) {
 382                 ll_finish_md_op_data(op_data);
 383                 RETURN(-ENODATA);
 384         }
 385
 386         op_data->op_fid3 = pfid;
 387
 388 #ifdef HAVE_DIR_CONTEXT
 389         ctx->pos = pos;
 390         rc = ll_dir_read(inode, &pos, op_data, ctx, &partial_readdir_rc);
 391         pos = ctx->pos;
 392 #else
 393         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir,
 394                          &partial_readdir_rc);
 395 #endif
 396         lfd->lfd_pos = pos;
 397         if (!lfd->fd_partial_readdir_rc)
 398                 lfd->fd_partial_readdir_rc = partial_readdir_rc;
 399
 400         if (pos == MDS_DIR_END_OFF) {
 401                 if (api32)
 402                         pos = LL_DIR_END_OFF_32BIT;
 403                 else
 404                         pos = LL_DIR_END_OFF;
 405         } else {
 406                 if (api32 && hash64)
 407                         pos = pos >> 32;
 408         }
 409 #ifdef HAVE_DIR_CONTEXT
 410         ctx->pos = pos;
 411 #else
 412         filp->f_pos = pos;
 413 #endif
 414         ll_finish_md_op_data(op_data);
 415
 416 out:
 417         if (!rc)
 418                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR,
 419                                    ktime_us_delta(ktime_get(), kstart));
 420
 421         RETURN(rc);
 422 }
 423
 424 /**
 425  * Create striped directory with specified stripe(@lump)
 426  *
 427  * \param[in] dparent   the parent of the directory.
 428  * \param[in] lump      the specified stripes.
 429  * \param[in] dirname   the name of the directory.
 430  * \param[in] mode      the specified mode of the directory.
 431  *
 432  * \retval              =0 if striped directory is being created successfully.
 433  *                      <0 if the creation is failed.
 434  */
 435 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 436                                size_t len, const char *dirname, umode_t mode,
 437                                bool createonly)
 438 {
 439         struct inode *parent = dparent->d_inode;
 440         struct ptlrpc_request *request = NULL;
 441         struct md_op_data *op_data;
 442         struct ll_sb_info *sbi = ll_i2sbi(parent);
 443         struct inode *inode = NULL;
 444         struct dentry dentry = {
 445                 .d_parent = dparent,
 446                 .d_name = {
 447                         .name = dirname,
 448                         .len = strlen(dirname),
 449                         .hash = ll_full_name_hash(dparent, dirname,
 450                                                   strlen(dirname)),
 451                 },
 452                 .d_sb = dparent->d_sb,
 453         };
 454         bool encrypt = false;
 455         int hash_flags;
 456         int err;
 457
 458         ENTRY;
 459         if (unlikely(!lmv_user_magic_supported(lump->lum_magic)))
 460                 RETURN(-EINVAL);
 461
 462         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 463                 CDEBUG(D_VFSTRACE,
 464                        "VFS Op:inode="DFID"(%p) name=%s stripe_offset=%d stripe_count=%u, hash_type=%x\n",
 465                        PFID(ll_inode2fid(parent)), parent, dirname,
 466                        (int)lump->lum_stripe_offset, lump->lum_stripe_count,
 467                        lump->lum_hash_type);
 468         } else {
 469                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 470
 471                 CDEBUG(D_VFSTRACE,
 472                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 473                        PFID(ll_inode2fid(parent)), parent, dirname,
 474                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 475         }
 476
 477         if (lump->lum_stripe_count > 1 &&
 478             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 479                 RETURN(-EINVAL);
 480
 481         if (IS_DEADDIR(parent) &&
 482             !CFS_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 483                 RETURN(-ENOENT);
 484
 485         /* MDS < 2.14 doesn't support 'crush' hash type, and cannot handle
 486          * unknown hash if client doesn't set a valid one. switch to fnv_1a_64.
 487          */
 488         if (CFS_FAIL_CHECK(OBD_FAIL_LMV_UNKNOWN_STRIPE)) {
 489                 lump->lum_hash_type = cfs_fail_val;
 490         } else if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_CRUSH)) {
 491                 enum lmv_hash_type type = lump->lum_hash_type &
 492                                           LMV_HASH_TYPE_MASK;
 493
 494                 if (type >= LMV_HASH_TYPE_CRUSH ||
 495                     type == LMV_HASH_TYPE_UNKNOWN)
 496                         lump->lum_hash_type = (lump->lum_hash_type ^ type) |
 497                                               LMV_HASH_TYPE_FNV_1A_64;
 498         }
 499
 500         hash_flags = lump->lum_hash_type & ~LMV_HASH_TYPE_MASK;
 501         if (hash_flags & ~LMV_HASH_FLAG_KNOWN)
 502                 RETURN(-EINVAL);
 503
 504         if (unlikely(!lmv_user_magic_supported(cpu_to_le32(lump->lum_magic))))
 505                 lustre_swab_lmv_user_md(lump);
 506
 507         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 508                 mode &= ~current_umask();
 509         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 510         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 511                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 512                                      lump);
 513         if (IS_ERR(op_data))
 514                 RETURN(PTR_ERR(op_data));
 515
 516         op_data->op_dir_depth = ll_i2info(parent)->lli_inherit_depth ?:
 517                                 ll_i2info(parent)->lli_dir_depth;
 518
 519         if (ll_sbi_has_encrypt(sbi) &&
 520             (IS_ENCRYPTED(parent) ||
 521              unlikely(ll_sb_has_test_dummy_encryption(parent->i_sb)))) {
 522                 err = llcrypt_prepare_readdir(parent);
 523                 if (err)
 524                         GOTO(out_op_data, err);
 525                 if (!llcrypt_has_encryption_key(parent))
 526                         GOTO(out_op_data, err = -ENOKEY);
 527                 encrypt = true;
 528         }
 529
 530         if (test_bit(LL_SBI_FILE_SECCTX, sbi->ll_flags)) {
 531                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 532                  * to determine the security context for the file. So our fake
 533                  * dentry should be real enough for this purpose. */
 534                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 535                                               &op_data->op_file_secctx_name,
 536                                               &op_data->op_file_secctx_name_size,
 537                                               &op_data->op_file_secctx,
 538                                               &op_data->op_file_secctx_size,
 539                                               &op_data->op_file_secctx_slot);
 540                 if (err < 0)
 541                         GOTO(out_op_data, err);
 542         }
 543
 544         if (encrypt) {
 545                 err = llcrypt_inherit_context(parent, NULL, op_data, false);
 546                 if (err)
 547                         GOTO(out_op_data, err);
 548         }
 549
 550         op_data->op_cli_flags |= CLI_SET_MEA;
 551         if (createonly)
 552                 op_data->op_bias |= MDS_SETSTRIPE_CREATE;
 553
 554         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 555                         from_kuid(&init_user_ns, current_fsuid()),
 556                         from_kgid(&init_user_ns, current_fsgid()),
 557                         current_cap(), 0, &request);
 558         if (err)
 559                 GOTO(out_request, err);
 560
 561         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 562
 563         err = ll_prep_inode(&inode, &request->rq_pill, parent->i_sb, NULL);
 564         if (err)
 565                 GOTO(out_inode, err);
 566
 567         dentry.d_inode = inode;
 568
 569         if (test_bit(LL_SBI_FILE_SECCTX, sbi->ll_flags))
 570                 err = ll_inode_notifysecctx(inode, op_data->op_file_secctx,
 571                                             op_data->op_file_secctx_size);
 572         else
 573                 err = ll_inode_init_security(&dentry, inode, parent);
 574
 575         if (err)
 576                 GOTO(out_inode, err);
 577
 578         if (encrypt) {
 579                 err = ll_set_encflags(inode, op_data->op_file_encctx,
 580                                       op_data->op_file_encctx_size, false);
 581                 if (err)
 582                         GOTO(out_inode, err);
 583         }
 584
 585 out_inode:
 586         iput(inode);
 587 out_request:
 588         ptlrpc_req_finished(request);
 589 out_op_data:
 590         ll_finish_md_op_data(op_data);
 591
 592         return err;
 593 }
 594
 595 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 596                      int set_default)
 597 {
 598         struct ll_sb_info *sbi = ll_i2sbi(inode);
 599         struct md_op_data *op_data;
 600         struct ptlrpc_request *req = NULL;
 601         int rc = 0;
 602         int lum_size;
 603         ENTRY;
 604
 605         if (lump != NULL) {
 606                 switch (lump->lmm_magic) {
 607                 case LOV_USER_MAGIC_V1:
 608                         lum_size = sizeof(struct lov_user_md_v1);
 609                         break;
 610                 case LOV_USER_MAGIC_V3:
 611                         lum_size = sizeof(struct lov_user_md_v3);
 612                         break;
 613                 case LOV_USER_MAGIC_COMP_V1:
 614                         lum_size = ((struct lov_comp_md_v1 *)lump)->lcm_size;
 615                         break;
 616                 case LMV_USER_MAGIC: {
 617                         struct lmv_user_md *lmv = (struct lmv_user_md *)lump;
 618
 619                         /* MDS < 2.14 doesn't support 'crush' hash type, and
 620                          * cannot handle unknown hash if client doesn't set a
 621                          * valid one. switch to fnv_1a_64.
 622                          */
 623                         if (!(exp_connect_flags2(sbi->ll_md_exp) &
 624                               OBD_CONNECT2_CRUSH)) {
 625                                 enum lmv_hash_type type = lmv->lum_hash_type &
 626                                                           LMV_HASH_TYPE_MASK;
 627
 628                                 if (type >= LMV_HASH_TYPE_CRUSH ||
 629                                     type == LMV_HASH_TYPE_UNKNOWN)
 630                                         lmv->lum_hash_type =
 631                                                 (lmv->lum_hash_type ^ type) |
 632                                                 LMV_HASH_TYPE_FNV_1A_64;
 633                         }
 634                         if (lmv->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
 635                                 lustre_swab_lmv_user_md(lmv);
 636                         lum_size = sizeof(*lmv);
 637                         break;
 638                 }
 639                 case LOV_USER_MAGIC_SPECIFIC: {
 640                         struct lov_user_md_v3 *v3 =
 641                                 (struct lov_user_md_v3 *)lump;
 642                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 643                                 RETURN(-EINVAL);
 644                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 645                                                     LOV_USER_MAGIC_SPECIFIC);
 646                         break;
 647                 }
 648                 default:
 649                         CDEBUG(D_IOCTL,
 650                                "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
 651                                lump->lmm_magic, LOV_USER_MAGIC_V1,
 652                                LOV_USER_MAGIC_V3);
 653                         RETURN(-EINVAL);
 654                 }
 655
 656                 /* This is coming from userspace, so should be in
 657                  * local endian.  But the MDS would like it in little
 658                  * endian, so we swab it before we send it.
 659                  */
 660                 if ((__swab32(lump->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
 661                     le32_to_cpu(LOV_MAGIC_MAGIC))
 662                         lustre_swab_lov_user_md(lump, 0);
 663         } else {
 664                 lum_size = sizeof(struct lov_user_md_v1);
 665         }
 666
 667         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 668                                      LUSTRE_OPC_ANY, NULL);
 669         if (IS_ERR(op_data))
 670                 RETURN(PTR_ERR(op_data));
 671
 672         /* swabbing is done in lov_setstripe() on server side */
 673         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 674         ll_finish_md_op_data(op_data);
 675         ptlrpc_req_finished(req);
 676         if (rc)
 677                 RETURN(rc);
 678
 679         RETURN(rc);
 680 }
 681
 682 /* get default LMV from client cache */
 683 static int ll_dir_get_default_lmv(struct inode *inode, struct lmv_user_md *lum)
 684 {
 685         struct ll_inode_info *lli = ll_i2info(inode);
 686         const struct lmv_stripe_md *lsm;
 687         bool fs_dmv_got = false;
 688         int rc = -ENODATA;
 689
 690         ENTRY;
 691 retry:
 692         if (lli->lli_def_lsm_obj) {
 693                 down_read(&lli->lli_lsm_sem);
 694                 lsm = &lli->lli_def_lsm_obj->lso_lsm;
 695                 if (lsm) {
 696                         lum->lum_magic = lsm->lsm_md_magic;
 697                         lum->lum_stripe_count = lsm->lsm_md_stripe_count;
 698                         lum->lum_stripe_offset = lsm->lsm_md_master_mdt_index;
 699                         lum->lum_hash_type = lsm->lsm_md_hash_type;
 700                         lum->lum_max_inherit = lsm->lsm_md_max_inherit;
 701                         lum->lum_max_inherit_rr = lsm->lsm_md_max_inherit_rr;
 702                         rc = 0;
 703                 }
 704                 up_read(&lli->lli_lsm_sem);
 705         }
 706
 707         if (rc == -ENODATA && !is_root_inode(inode) && !fs_dmv_got) {
 708                 lli = ll_i2info(inode->i_sb->s_root->d_inode);
 709                 fs_dmv_got = true;
 710                 goto retry;
 711         }
 712
 713         if (!rc && fs_dmv_got) {
 714                 lli = ll_i2info(inode);
 715                 if (lum->lum_max_inherit != LMV_INHERIT_UNLIMITED) {
 716                         if (lum->lum_max_inherit == LMV_INHERIT_NONE ||
 717                             lum->lum_max_inherit < LMV_INHERIT_END ||
 718                             lum->lum_max_inherit > LMV_INHERIT_MAX ||
 719                             lum->lum_max_inherit <= lli->lli_dir_depth)
 720                                 GOTO(out, rc = -ENODATA);
 721
 722                         lum->lum_max_inherit -= lli->lli_dir_depth;
 723                 }
 724
 725                 if (lum->lum_max_inherit_rr != LMV_INHERIT_RR_UNLIMITED) {
 726                         if (lum->lum_max_inherit_rr == LMV_INHERIT_NONE ||
 727                             lum->lum_max_inherit_rr < LMV_INHERIT_RR_END ||
 728                             lum->lum_max_inherit_rr > LMV_INHERIT_RR_MAX ||
 729                             lum->lum_max_inherit_rr <= lli->lli_dir_depth)
 730                                 lum->lum_max_inherit_rr = LMV_INHERIT_RR_NONE;
 731
 732                         if (lum->lum_max_inherit_rr > lli->lli_dir_depth)
 733                                 lum->lum_max_inherit_rr -= lli->lli_dir_depth;
 734                 }
 735         }
 736 out:
 737         RETURN(rc);
 738 }
 739
 740 int ll_dir_get_default_layout(struct inode *inode, void **plmm, int *plmm_size,
 741                               struct ptlrpc_request **request, u64 valid,
 742                               enum get_default_layout_type type)
 743 {
 744         struct ll_sb_info *sbi = ll_i2sbi(inode);
 745         struct mdt_body   *body;
 746         struct lov_mds_md *lmm = NULL;
 747         struct ptlrpc_request *req = NULL;
 748         int lmm_size = OBD_MAX_DEFAULT_EA_SIZE;
 749         struct md_op_data *op_data;
 750         struct lu_fid fid;
 751         int rc;
 752
 753         ENTRY;
 754
 755         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, lmm_size,
 756                                      LUSTRE_OPC_ANY, NULL);
 757         if (IS_ERR(op_data))
 758                 RETURN(PTR_ERR(op_data));
 759
 760         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 761
 762         if (type == GET_DEFAULT_LAYOUT_ROOT) {
 763                 lu_root_fid(&op_data->op_fid1);
 764                 fid = op_data->op_fid1;
 765         } else {
 766                 fid = *ll_inode2fid(inode);
 767         }
 768
 769         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 770         ll_finish_md_op_data(op_data);
 771         if (rc < 0) {
 772                 CDEBUG(D_INFO, "md_getattr failed on inode "DFID": rc %d\n",
 773                        PFID(&fid), rc);
 774                 GOTO(out, rc);
 775         }
 776
 777         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 778         LASSERT(body != NULL);
 779
 780         lmm_size = body->mbo_eadatasize;
 781
 782         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 783             lmm_size == 0) {
 784                 GOTO(out, rc = -ENODATA);
 785         }
 786
 787         lmm = req_capsule_server_sized_get(&req->rq_pill,
 788                                            &RMF_MDT_MD, lmm_size);
 789         LASSERT(lmm != NULL);
 790
 791         /* This is coming from the MDS, so is probably in
 792          * little endian.  We convert it to host endian before
 793          * passing it to userspace.
 794          */
 795         /* We don't swab objects for directories */
 796         switch (le32_to_cpu(lmm->lmm_magic)) {
 797         case LOV_MAGIC_V1:
 798         case LOV_MAGIC_V3:
 799         case LOV_MAGIC_COMP_V1:
 800         case LOV_USER_MAGIC_SPECIFIC:
 801                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 802                         lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
 803                 break;
 804         case LMV_MAGIC_V1:
 805                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 806                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 807                 break;
 808         case LMV_USER_MAGIC:
 809                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 810                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 811                 break;
 812         case LMV_MAGIC_FOREIGN: {
 813                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 814
 815                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 816                         __swab32s(&lfm->lfm_magic);
 817                         __swab32s(&lfm->lfm_length);
 818                         __swab32s(&lfm->lfm_type);
 819                         __swab32s(&lfm->lfm_flags);
 820                 }
 821                 break;
 822         }
 823         default:
 824                 rc = -EPROTO;
 825                 CERROR("%s: unknown magic: %lX: rc = %d\n", sbi->ll_fsname,
 826                        (unsigned long)lmm->lmm_magic, rc);
 827         }
 828 out:
 829         *plmm = lmm;
 830         *plmm_size = lmm_size;
 831         *request = req;
 832         return rc;
 833 }
 834
 835 /**
 836  * This function will be used to get default LOV/LMV/Default LMV
 837  * @valid will be used to indicate which stripe it will retrieve.
 838  * If the directory does not have its own default layout, then the
 839  * function will request the default layout from root FID.
 840  *      OBD_MD_MEA              LMV stripe EA
 841  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 842  *      otherwise               Default LOV EA.
 843  * Each time, it can only retrieve 1 stripe EA
 844  **/
 845 int ll_dir_getstripe_default(struct inode *inode, void **plmm, int *plmm_size,
 846                              struct ptlrpc_request **request,
 847                              struct ptlrpc_request **root_request,
 848                              u64 valid)
 849 {
 850         struct ptlrpc_request *req = NULL;
 851         struct ptlrpc_request *root_req = NULL;
 852         struct lov_mds_md *lmm = NULL;
 853         int lmm_size = 0;
 854         int rc = 0;
 855         ENTRY;
 856
 857         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 858                                        &req, valid, 0);
 859         if (rc == -ENODATA && !fid_is_root(ll_inode2fid(inode)) &&
 860             !(valid & OBD_MD_MEA) && root_request != NULL) {
 861                 int rc2 = ll_dir_get_default_layout(inode, (void **)&lmm,
 862                                                     &lmm_size, &root_req, valid,
 863                                                     GET_DEFAULT_LAYOUT_ROOT);
 864                 if (rc2 == 0)
 865                         rc = 0;
 866         }
 867
 868         *plmm = lmm;
 869         *plmm_size = lmm_size;
 870         *request = req;
 871         if (root_request != NULL)
 872                 *root_request = root_req;
 873
 874         RETURN(rc);
 875 }
 876
 877 /**
 878  * This function will be used to get default LOV/LMV/Default LMV
 879  * @valid will be used to indicate which stripe it will retrieve
 880  *      OBD_MD_MEA              LMV stripe EA
 881  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 882  *      otherwise               Default LOV EA.
 883  * Each time, it can only retrieve 1 stripe EA
 884  **/
 885 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 886                      struct ptlrpc_request **request, u64 valid)
 887 {
 888         struct ptlrpc_request *req = NULL;
 889         struct lov_mds_md *lmm = NULL;
 890         int lmm_size = 0;
 891         int rc = 0;
 892         ENTRY;
 893
 894         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 895                                        &req, valid, 0);
 896
 897         *plmm = lmm;
 898         *plmm_size = lmm_size;
 899         *request = req;
 900
 901         RETURN(rc);
 902 }
 903
 904 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 905 {
 906         struct md_op_data       *op_data;
 907         int                     rc;
 908         int                     mdt_index;
 909         ENTRY;
 910
 911         OBD_ALLOC_PTR(op_data);
 912         if (op_data == NULL)
 913                 RETURN(-ENOMEM);
 914
 915         op_data->op_flags |= MF_GET_MDT_IDX;
 916         op_data->op_fid1 = *fid;
 917         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 918         mdt_index = op_data->op_mds;
 919         OBD_FREE_PTR(op_data);
 920         if (rc < 0)
 921                 RETURN(rc);
 922
 923         RETURN(mdt_index);
 924 }
 925
 926 /*
 927  *  Get MDT index for the inode.
 928  */
 929 int ll_get_mdt_idx(struct inode *inode)
 930 {
 931         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 932 }
 933
 934 /**
 935  * Generic handler to do any pre-copy work.
 936  *
 937  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 938  * first information for it that real work has started.
 939  *
 940  * Moreover, for a ARCHIVE request, it will sample the file data version and
 941  * store it in \a copy.
 942  *
 943  * \return 0 on success.
 944  */
 945 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 946 {
 947         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 948         struct hsm_progress_kernel       hpk;
 949         int                              rc = 0;
 950         int                              rc2;
 951         ENTRY;
 952
 953         /* Forge a hsm_progress based on data from copy. */
 954         hpk.hpk_fid = copy->hc_hai.hai_fid;
 955         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 956         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 957         hpk.hpk_extent.length = 0;
 958         hpk.hpk_flags = 0;
 959         hpk.hpk_errval = 0;
 960         hpk.hpk_data_version = 0;
 961
 962
 963         /* For archive request, we need to read the current file version. */
 964         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 965                 struct inode    *inode;
 966                 __u64            data_version = 0;
 967
 968                 /* Get inode for this fid */
 969                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 970                 if (IS_ERR(inode)) {
 971                         hpk.hpk_flags |= HP_FLAG_RETRY;
 972                         /* hpk_errval is >= 0 */
 973                         hpk.hpk_errval = -PTR_ERR(inode);
 974                         GOTO(progress, rc = PTR_ERR(inode));
 975                 }
 976
 977                 /* Read current file data version */
 978                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 979                 iput(inode);
 980                 if (rc != 0) {
 981                         CDEBUG(D_HSM, "Could not read file data version of "
 982                                       DFID" (rc = %d). Archive request ("
 983                                       "%#llx) could not be done.\n",
 984                                       PFID(&copy->hc_hai.hai_fid), rc,
 985                                       copy->hc_hai.hai_cookie);
 986                         hpk.hpk_flags |= HP_FLAG_RETRY;
 987                         /* hpk_errval must be >= 0 */
 988                         hpk.hpk_errval = -rc;
 989                         GOTO(progress, rc);
 990                 }
 991
 992                 /* Store in the hsm_copy for later copytool use.
 993                  * Always modified even if no lsm. */
 994                 copy->hc_data_version = data_version;
 995         }
 996
 997 progress:
 998         /* On error, the request should be considered as completed */
 999         if (hpk.hpk_errval > 0)
1000                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
1001
1002         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1003                             &hpk, NULL);
1004
1005         /* Return first error */
1006         RETURN(rc != 0 ? rc : rc2);
1007 }
1008
1009 /**
1010  * Generic handler to do any post-copy work.
1011  *
1012  * It will send the last hsm_progress update to coordinator to inform it
1013  * that copy is finished and whether it was successful or not.
1014  *
1015  * Moreover,
1016  * - for ARCHIVE request, it will sample the file data version and compare it
1017  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
1018  *   will be considered as failed.
1019  * - for RESTORE request, it will sample the file data version and send it to
1020  *   coordinator which is useful if the file was imported as 'released'.
1021  *
1022  * \return 0 on success.
1023  */
1024 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
1025 {
1026         struct ll_sb_info               *sbi = ll_s2sbi(sb);
1027         struct hsm_progress_kernel       hpk;
1028         int                              rc = 0;
1029         int                              rc2;
1030         ENTRY;
1031
1032         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
1033         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
1034          * initialized if copy_end was called with copy == NULL.
1035          */
1036
1037         /* Forge a hsm_progress based on data from copy. */
1038         hpk.hpk_fid = copy->hc_hai.hai_fid;
1039         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
1040         hpk.hpk_extent = copy->hc_hai.hai_extent;
1041         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
1042         hpk.hpk_errval = copy->hc_errval;
1043         hpk.hpk_data_version = 0;
1044
1045         /* For archive request, we need to check the file data was not changed.
1046          *
1047          * For restore request, we need to send the file data version, this is
1048          * useful when the file was created using hsm_import.
1049          */
1050         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
1051              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
1052             (copy->hc_errval == 0)) {
1053                 struct inode    *inode;
1054                 __u64            data_version = 0;
1055
1056                 /* Get lsm for this fid */
1057                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
1058                 if (IS_ERR(inode)) {
1059                         hpk.hpk_flags |= HP_FLAG_RETRY;
1060                         /* hpk_errval must be >= 0 */
1061                         hpk.hpk_errval = -PTR_ERR(inode);
1062                         GOTO(progress, rc = PTR_ERR(inode));
1063                 }
1064
1065                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
1066                 iput(inode);
1067                 if (rc) {
1068                         CDEBUG(D_HSM,
1069                                "Could not read file data version. Request could not be confirmed.\n");
1070                         if (hpk.hpk_errval == 0)
1071                                 hpk.hpk_errval = -rc;
1072                         GOTO(progress, rc);
1073                 }
1074
1075                 /* Store in the hsm_copy for later copytool use.
1076                  * Always modified even if no lsm. */
1077                 hpk.hpk_data_version = data_version;
1078
1079                 /* File could have been stripped during archiving, so we need
1080                  * to check anyway. */
1081                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
1082                     (copy->hc_data_version != data_version)) {
1083                         CDEBUG(D_HSM, "File data version mismatched. "
1084                               "File content was changed during archiving. "
1085                                DFID", start:%#llx current:%#llx\n",
1086                                PFID(&copy->hc_hai.hai_fid),
1087                                copy->hc_data_version, data_version);
1088                         /* File was changed, send error to cdt. Do not ask for
1089                          * retry because if a file is modified frequently,
1090                          * the cdt will loop on retried archive requests.
1091                          * The policy engine will ask for a new archive later
1092                          * when the file will not be modified for some tunable
1093                          * time */
1094                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
1095                         rc = -EBUSY;
1096                         /* hpk_errval must be >= 0 */
1097                         hpk.hpk_errval = -rc;
1098                         GOTO(progress, rc);
1099                 }
1100
1101         }
1102
1103 progress:
1104         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1105                             &hpk, NULL);
1106
1107         /* Return first error */
1108         RETURN(rc != 0 ? rc : rc2);
1109 }
1110
1111
1112 static int copy_and_ct_start(int cmd, struct obd_export *exp,
1113                              const struct lustre_kernelcomm __user *data)
1114 {
1115         struct lustre_kernelcomm *lk;
1116         struct lustre_kernelcomm *tmp;
1117         size_t size = sizeof(*lk);
1118         size_t new_size;
1119         int i;
1120         int rc;
1121
1122         /* copy data from userspace to get numbers of archive_id */
1123         OBD_ALLOC(lk, size);
1124         if (lk == NULL)
1125                 return -ENOMEM;
1126
1127         if (copy_from_user(lk, data, size))
1128                 GOTO(out_lk, rc = -EFAULT);
1129
1130         if (lk->lk_flags & LK_FLG_STOP)
1131                 goto do_ioctl;
1132
1133         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1134                 __u32 archive_mask = lk->lk_data_count;
1135                 int count;
1136
1137                 /* old hsm agent to old MDS */
1138                 if (!exp_connect_archive_id_array(exp))
1139                         goto do_ioctl;
1140
1141                 /* old hsm agent to new MDS */
1142                 lk->lk_flags |= LK_FLG_DATANR;
1143
1144                 if (archive_mask == 0)
1145                         goto do_ioctl;
1146
1147                 count = hweight32(archive_mask);
1148                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1149                 OBD_ALLOC(tmp, new_size);
1150                 if (tmp == NULL)
1151                         GOTO(out_lk, rc = -ENOMEM);
1152
1153                 memcpy(tmp, lk, size);
1154                 tmp->lk_data_count = count;
1155                 OBD_FREE(lk, size);
1156                 lk = tmp;
1157                 size = new_size;
1158
1159                 count = 0;
1160                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1161                         if (BIT(i) & archive_mask) {
1162                                 lk->lk_data[count] = i + 1;
1163                                 count++;
1164                         }
1165                 }
1166                 goto do_ioctl;
1167         }
1168
1169         /* new hsm agent to new mds */
1170         if (lk->lk_data_count > 0) {
1171                 new_size = offsetof(struct lustre_kernelcomm,
1172                                     lk_data[lk->lk_data_count]);
1173                 OBD_ALLOC(tmp, new_size);
1174                 if (tmp == NULL)
1175                         GOTO(out_lk, rc = -ENOMEM);
1176
1177                 OBD_FREE(lk, size);
1178                 lk = tmp;
1179                 size = new_size;
1180
1181                 if (copy_from_user(lk, data, size))
1182                         GOTO(out_lk, rc = -EFAULT);
1183         }
1184
1185         /* new hsm agent to old MDS */
1186         if (!exp_connect_archive_id_array(exp)) {
1187                 __u32 archives = 0;
1188
1189                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1190                         GOTO(out_lk, rc = -EINVAL);
1191
1192                 for (i = 0; i < lk->lk_data_count; i++) {
1193                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1194                                 rc = -EINVAL;
1195                                 CERROR("%s: archive id %d requested but only [0 - %zu] supported: rc = %d\n",
1196                                        exp->exp_obd->obd_name, lk->lk_data[i],
1197                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1198                                 GOTO(out_lk, rc);
1199                         }
1200
1201                         if (lk->lk_data[i] == 0) {
1202                                 archives = 0;
1203                                 break;
1204                         }
1205
1206                         archives |= (1 << (lk->lk_data[i] - 1));
1207                 }
1208                 lk->lk_flags &= ~LK_FLG_DATANR;
1209                 lk->lk_data_count = archives;
1210         }
1211 do_ioctl:
1212         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1213 out_lk:
1214         OBD_FREE(lk, size);
1215         return rc;
1216 }
1217
1218 static int check_owner(int type, int id)
1219 {
1220         switch (type) {
1221         case USRQUOTA:
1222                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1223                         return -EPERM;
1224                 break;
1225         case GRPQUOTA:
1226                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1227                         return -EPERM;
1228                 break;
1229         case PRJQUOTA:
1230                 break;
1231         }
1232         return 0;
1233 }
1234
1235 struct kmem_cache *quota_iter_slab;
1236 static DEFINE_MUTEX(quotactl_iter_lock);
1237
1238 struct ll_quotactl_iter_list {
1239         __u64            lqil_mark;      /* iter identifier */
1240         __u32            lqil_flags;     /* what has been done */
1241         pid_t            lqil_pid;       /* debug calling task */
1242         time64_t         lqil_iter_time; /* the time to iter */
1243         struct list_head lqil_sbi_list;  /* list on ll_sb_info */
1244         struct list_head lqil_quotactl_iter_list; /* list of quota iters */
1245 };
1246
1247 void ll_quota_iter_check_and_cleanup(struct ll_sb_info *sbi, bool check)
1248 {
1249         struct if_quotactl_iter *iter_rec = NULL;
1250         struct ll_quotactl_iter_list *tmp, *ll_iter = NULL;
1251
1252         if (!check)
1253                 mutex_lock(&quotactl_iter_lock);
1254
1255         list_for_each_entry_safe(ll_iter, tmp, &sbi->ll_all_quota_list,
1256                                  lqil_sbi_list) {
1257                 if (check &&
1258                     ll_iter->lqil_iter_time > (ktime_get_seconds() - 86400))
1259                         continue;
1260
1261                 while ((iter_rec = list_first_entry_or_null(
1262                                         &ll_iter->lqil_quotactl_iter_list,
1263                                         struct if_quotactl_iter,
1264                                         qci_link)) != NULL) {
1265                         list_del_init(&iter_rec->qci_link);
1266                         OBD_SLAB_FREE_PTR(iter_rec, quota_iter_slab);
1267                 }
1268
1269                 list_del_init(&ll_iter->lqil_sbi_list);
1270                 OBD_FREE_PTR(ll_iter);
1271         }
1272
1273         if (!check)
1274                 mutex_unlock(&quotactl_iter_lock);
1275 }
1276
1277 /* iterate the quota usage from all QSDs */
1278 static int quotactl_iter_acct(struct list_head *quota_list, void *buffer,
1279                               __u64 size, __u64 *count, __u32 qtype, bool is_md)
1280 {
1281         struct if_quotactl_iter *tmp, *iter = NULL;
1282         struct lquota_acct_rec *acct;
1283         __u64 qid, cur = 0;
1284         int rc = 0;
1285
1286         ENTRY;
1287
1288         while (cur < size) {
1289                 if ((size - cur) <
1290                     (sizeof(qid) + sizeof(*acct))) {
1291                         rc = -EPROTO;
1292                         break;
1293                 }
1294
1295                 qid = *((__u64 *)(buffer + cur));
1296                 cur += sizeof(qid);
1297                 acct = (struct lquota_acct_rec *)(buffer + cur);
1298                 cur += sizeof(*acct);
1299
1300                 iter = NULL;
1301                 list_for_each_entry(tmp, quota_list, qci_link) {
1302                         if (tmp->qci_qc.qc_id == (__u32)qid) {
1303                                 iter = tmp;
1304                                 break;
1305                         }
1306                 }
1307
1308                 if (iter == NULL) {
1309                         CDEBUG(D_QUOTA, "can't find the iter record for %llu\n",
1310                                qid);
1311
1312                         if (qid != 0)
1313                                 continue;
1314
1315                         OBD_SLAB_ALLOC_PTR(iter, quota_iter_slab);
1316                         if (iter == NULL) {
1317                                 rc = -ENOMEM;
1318                                 break;
1319                         }
1320
1321                         INIT_LIST_HEAD(&iter->qci_link);
1322                         iter->qci_qc.qc_id = 0;
1323                         iter->qci_qc.qc_type = qtype;
1324                         (*count)++;
1325
1326                         list_add(&iter->qci_link, quota_list);
1327                 }
1328
1329                 if (is_md) {
1330                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_INODES;
1331                         iter->qci_qc.qc_dqblk.dqb_curinodes += acct->ispace;
1332                         iter->qci_qc.qc_dqblk.dqb_curspace += acct->bspace;
1333                 } else {
1334                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_SPACE;
1335                         iter->qci_qc.qc_dqblk.dqb_curspace += acct->bspace;
1336                 }
1337         }
1338
1339         RETURN(rc);
1340 }
1341
1342 /* iterate all quota settings from QMT */
1343 static int quotactl_iter_glb(struct list_head *quota_list, void *buffer,
1344                              __u64 size, __u64 *count, __u32 qtype, bool is_md)
1345 {
1346         struct if_quotactl_iter *tmp, *iter = NULL;
1347         struct lquota_glb_rec *glb;
1348         __u64 qid, cur = 0;
1349         bool inserted = false;
1350         int rc = 0;
1351
1352         ENTRY;
1353
1354         while (cur < size) {
1355                 if ((size - cur) <
1356                     (sizeof(qid) + sizeof(*glb))) {
1357                         rc = -EPROTO;
1358                         break;
1359                 }
1360
1361                 qid = *((__u64 *)(buffer + cur));
1362                 cur += sizeof(qid);
1363                 glb = (struct lquota_glb_rec *)(buffer + cur);
1364                 cur += sizeof(*glb);
1365
1366                 iter = NULL;
1367                 list_for_each_entry(tmp, quota_list, qci_link) {
1368                         if (tmp->qci_qc.qc_id == (__u32)qid) {
1369                                 iter = tmp;
1370                                 break;
1371                         }
1372                 }
1373
1374                 if (iter == NULL) {
1375                         OBD_SLAB_ALLOC_PTR(iter, quota_iter_slab);
1376                         if (iter == NULL) {
1377                                 rc = -ENOMEM;
1378                                 break;
1379                         }
1380
1381                         INIT_LIST_HEAD(&iter->qci_link);
1382
1383                         inserted = false;
1384                         list_for_each_entry(tmp, quota_list, qci_link) {
1385                                 if (tmp->qci_qc.qc_id < qid)
1386                                         continue;
1387
1388                                 inserted = true;
1389                                 list_add_tail(&iter->qci_link,
1390                                               &tmp->qci_link);
1391                                 break;
1392                         }
1393
1394                         if (!inserted)
1395                                 list_add_tail(&iter->qci_link, quota_list);
1396
1397                         iter->qci_qc.qc_type = qtype;
1398                         iter->qci_qc.qc_id = (__u32)qid;
1399                         (*count)++;
1400                 }
1401
1402                 if (is_md) {
1403                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_ILIMITS;
1404                         iter->qci_qc.qc_dqblk.dqb_ihardlimit =
1405                                                              glb->qbr_hardlimit;
1406                         iter->qci_qc.qc_dqblk.dqb_isoftlimit =
1407                                                              glb->qbr_softlimit;
1408                         iter->qci_qc.qc_dqblk.dqb_itime = glb->qbr_time;
1409                 } else {
1410                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_BLIMITS;
1411                         iter->qci_qc.qc_dqblk.dqb_bhardlimit =
1412                                                              glb->qbr_hardlimit;
1413                         iter->qci_qc.qc_dqblk.dqb_bsoftlimit =
1414                                                              glb->qbr_softlimit;
1415                         iter->qci_qc.qc_dqblk.dqb_btime = glb->qbr_time;
1416                 }
1417         }
1418
1419         RETURN(rc);
1420 }
1421
1422 /* iterate the quota setting from QMT and all QSDs to get the quota information
1423  * for all users or groups
1424  **/
1425 static int quotactl_iter(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1426 {
1427         struct list_head iter_quota_glb_list;
1428         struct list_head iter_obd_quota_md_list;
1429         struct list_head iter_obd_quota_dt_list;
1430         struct ll_quotactl_iter_list *ll_iter;
1431         struct lquota_iter *iter;
1432         struct obd_quotactl *oqctl;
1433         __u64 count;
1434         int rc = 0;
1435
1436         ENTRY;
1437
1438         OBD_ALLOC_PTR(ll_iter);
1439         if (ll_iter == NULL)
1440                 RETURN(-ENOMEM);
1441
1442         INIT_LIST_HEAD(&ll_iter->lqil_sbi_list);
1443         INIT_LIST_HEAD(&ll_iter->lqil_quotactl_iter_list);
1444
1445         mutex_lock(&quotactl_iter_lock);
1446
1447         if (!list_empty(&sbi->ll_all_quota_list))
1448                 ll_quota_iter_check_and_cleanup(sbi, true);
1449
1450         INIT_LIST_HEAD(&iter_quota_glb_list);
1451         INIT_LIST_HEAD(&iter_obd_quota_md_list);
1452         INIT_LIST_HEAD(&iter_obd_quota_dt_list);
1453
1454         OBD_ALLOC_PTR(oqctl);
1455         if (oqctl == NULL)
1456                 GOTO(out, rc = -ENOMEM);
1457
1458         QCTL_COPY(oqctl, qctl);
1459         oqctl->qc_iter_list = (__u64)&iter_quota_glb_list;
1460         rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1461         if (rc)
1462                 GOTO(cleanup, rc);
1463
1464         QCTL_COPY(oqctl, qctl);
1465         oqctl->qc_cmd = LUSTRE_Q_ITEROQUOTA;
1466         oqctl->qc_iter_list = (__u64)&iter_obd_quota_md_list;
1467         rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1468         if (rc)
1469                 GOTO(cleanup, rc);
1470
1471         QCTL_COPY(oqctl, qctl);
1472         oqctl->qc_cmd = LUSTRE_Q_ITEROQUOTA;
1473         oqctl->qc_iter_list = (__u64)&iter_obd_quota_dt_list;
1474         rc = obd_quotactl(sbi->ll_dt_exp, oqctl);
1475         if (rc)
1476                 GOTO(cleanup, rc);
1477
1478         count = 0;
1479         while ((iter = list_first_entry_or_null(&iter_quota_glb_list,
1480                                                 struct lquota_iter, li_link))) {
1481                 void *buffer;
1482
1483                 buffer = iter->li_buffer;
1484                 rc = quotactl_iter_glb(&ll_iter->lqil_quotactl_iter_list,
1485                                        buffer, iter->li_md_size, &count,
1486                                        oqctl->qc_type, true);
1487                 if (rc)
1488                         GOTO(cleanup, rc);
1489
1490                 buffer = iter->li_buffer + LQUOTA_ITER_BUFLEN / 2;
1491                 rc = quotactl_iter_glb(&ll_iter->lqil_quotactl_iter_list,
1492                                        buffer, iter->li_dt_size, &count,
1493                                        oqctl->qc_type,  false);
1494
1495                 if (rc)
1496                         GOTO(cleanup, rc);
1497
1498                 list_del_init(&iter->li_link);
1499                 OBD_FREE_LARGE(iter,
1500                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1501         }
1502
1503         while ((iter = list_first_entry_or_null(&iter_obd_quota_md_list,
1504                                                 struct lquota_iter, li_link))) {
1505                 rc = quotactl_iter_acct(&ll_iter->lqil_quotactl_iter_list,
1506                                         iter->li_buffer, iter->li_md_size,
1507                                         &count, oqctl->qc_type, true);
1508                 if (rc)
1509                         GOTO(cleanup, rc);
1510
1511                 list_del_init(&iter->li_link);
1512                 OBD_FREE_LARGE(iter,
1513                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1514         }
1515
1516         while ((iter = list_first_entry_or_null(&iter_obd_quota_dt_list,
1517                                                 struct lquota_iter, li_link))) {
1518                 rc = quotactl_iter_acct(&ll_iter->lqil_quotactl_iter_list,
1519                                         iter->li_buffer, iter->li_dt_size,
1520                                         &count, oqctl->qc_type, false);
1521                 if (rc)
1522                         GOTO(cleanup, rc);
1523
1524                 list_del_init(&iter->li_link);
1525                 OBD_FREE_LARGE(iter,
1526                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1527         }
1528
1529         ll_iter->lqil_mark = ((__u64)current->pid << 32) |
1530                              ((__u32)qctl->qc_type << 8) |
1531                              (ktime_get_seconds() & 0xFFFFFF);
1532         ll_iter->lqil_flags = qctl->qc_type;
1533         ll_iter->lqil_pid = current->pid;
1534         ll_iter->lqil_iter_time = ktime_get_seconds();
1535
1536         list_add(&ll_iter->lqil_sbi_list, &sbi->ll_all_quota_list);
1537
1538         qctl->qc_allquota_count = count;
1539         qctl->qc_allquota_mark = ll_iter->lqil_mark;
1540         GOTO(out, rc);
1541
1542 cleanup:
1543         ll_quota_iter_check_and_cleanup(sbi, true);
1544
1545         while ((iter = list_first_entry_or_null(&iter_quota_glb_list,
1546                                                 struct lquota_iter, li_link))) {
1547                 list_del_init(&iter->li_link);
1548                 OBD_FREE_LARGE(iter,
1549                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1550         }
1551
1552         while ((iter = list_first_entry_or_null(&iter_obd_quota_md_list,
1553                                                 struct lquota_iter, li_link))) {
1554                 list_del_init(&iter->li_link);
1555                 OBD_FREE_LARGE(iter,
1556                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1557         }
1558
1559         while ((iter = list_first_entry_or_null(&iter_obd_quota_dt_list,
1560                                                 struct lquota_iter, li_link))) {
1561                 list_del_init(&iter->li_link);
1562                 OBD_FREE_LARGE(iter,
1563                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1564         }
1565
1566         OBD_FREE_PTR(ll_iter);
1567
1568 out:
1569         OBD_FREE_PTR(oqctl);
1570
1571         mutex_unlock(&quotactl_iter_lock);
1572         RETURN(rc);
1573 }
1574
1575 static int quotactl_getallquota(struct ll_sb_info *sbi,
1576                                 struct if_quotactl *qctl)
1577 {
1578         struct ll_quotactl_iter_list *ll_iter = NULL;
1579         struct if_quotactl_iter *iter = NULL;
1580         void __user *buffer = (void __user *)qctl->qc_allquota_buffer;
1581         __u64 cur = 0, count = qctl->qc_allquota_buflen;
1582         int rc = 0;
1583
1584         ENTRY;
1585
1586         mutex_lock(&quotactl_iter_lock);
1587
1588         while ((ll_iter = list_first_entry_or_null(&sbi->ll_all_quota_list,
1589                                                 struct ll_quotactl_iter_list,
1590                                                 lqil_sbi_list)) != NULL) {
1591                 if (qctl->qc_allquota_mark == ll_iter->lqil_mark)
1592                         break;
1593         }
1594
1595         if (!ll_iter) {
1596                 mutex_unlock(&quotactl_iter_lock);
1597                 RETURN(-EBUSY);
1598         }
1599
1600         while ((iter = list_first_entry_or_null(
1601                                         &ll_iter->lqil_quotactl_iter_list,
1602                                         struct if_quotactl_iter, qci_link))) {
1603                 if (count - cur < sizeof(struct if_quotactl)) {
1604                         rc = -ERANGE;
1605                         break;
1606                 }
1607
1608                 if (copy_to_user(buffer + cur, &iter->qci_qc,
1609                                  sizeof(struct if_quotactl))) {
1610                         rc = -EFAULT;
1611                         break;
1612                 }
1613
1614                 cur += sizeof(struct if_quotactl);
1615
1616                 list_del_init(&iter->qci_link);
1617                 OBD_SLAB_FREE_PTR(iter, quota_iter_slab);
1618         }
1619
1620         /* cleanup in case of error */
1621         while ((iter = list_first_entry_or_null(
1622                                         &ll_iter->lqil_quotactl_iter_list,
1623                                         struct if_quotactl_iter, qci_link))) {
1624                 list_del_init(&iter->qci_link);
1625                 OBD_SLAB_FREE_PTR(iter, quota_iter_slab);
1626         }
1627
1628         mutex_unlock(&quotactl_iter_lock);
1629
1630         RETURN(rc);
1631 }
1632
1633 int quotactl_ioctl(struct super_block *sb, struct if_quotactl *qctl)
1634 {
1635         struct ll_sb_info *sbi = ll_s2sbi(sb);
1636         int cmd = qctl->qc_cmd;
1637         int type = qctl->qc_type;
1638         int id = qctl->qc_id;
1639         int valid = qctl->qc_valid;
1640         int rc = 0;
1641
1642         ENTRY;
1643
1644         switch (cmd) {
1645         case Q_SETQUOTA:
1646         case Q_SETINFO:
1647         case LUSTRE_Q_SETDEFAULT:
1648         case LUSTRE_Q_SETQUOTAPOOL:
1649         case LUSTRE_Q_SETINFOPOOL:
1650         case LUSTRE_Q_SETDEFAULT_POOL:
1651         case LUSTRE_Q_DELETEQID:
1652         case LUSTRE_Q_RESETQID:
1653                 if (!capable(CAP_SYS_ADMIN))
1654                         RETURN(-EPERM);
1655
1656                 if (sb->s_flags & SB_RDONLY)
1657                         RETURN(-EROFS);
1658                 break;
1659         case Q_GETQUOTA:
1660         case LUSTRE_Q_GETDEFAULT:
1661         case LUSTRE_Q_GETQUOTAPOOL:
1662         case LUSTRE_Q_GETDEFAULT_POOL:
1663         case LUSTRE_Q_ITERQUOTA:
1664         case LUSTRE_Q_GETALLQUOTA:
1665                 if (check_owner(type, id) &&
1666                     (!capable(CAP_SYS_ADMIN)))
1667                         RETURN(-EPERM);
1668                 break;
1669         case Q_GETINFO:
1670         case LUSTRE_Q_GETINFOPOOL:
1671                 break;
1672         default:
1673                 CERROR("%s: unsupported quotactl op: %#x: rc = %d\n",
1674                        sbi->ll_fsname, cmd, -EOPNOTSUPP);
1675                 RETURN(-EOPNOTSUPP);
1676         }
1677
1678         if (cmd == LUSTRE_Q_ITERQUOTA) {
1679                 rc = quotactl_iter(sbi, qctl);
1680         } else if (cmd == LUSTRE_Q_GETALLQUOTA) {
1681                 rc = quotactl_getallquota(sbi, qctl);
1682         } else if (valid != QC_GENERAL) {
1683                 if (cmd == Q_GETINFO)
1684                         qctl->qc_cmd = Q_GETOINFO;
1685                 else if (cmd == Q_GETQUOTA ||
1686                          cmd == LUSTRE_Q_GETQUOTAPOOL)
1687                         qctl->qc_cmd = Q_GETOQUOTA;
1688                 else
1689                         RETURN(-EINVAL);
1690
1691                 switch (valid) {
1692                 case QC_MDTIDX:
1693                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1694                                            sizeof(*qctl), qctl, NULL);
1695                         break;
1696                 case QC_OSTIDX:
1697                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1698                                            sizeof(*qctl), qctl, NULL);
1699                         break;
1700                 case QC_UUID:
1701                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1702                                            sizeof(*qctl), qctl, NULL);
1703                         if (rc == -EAGAIN)
1704                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1705                                                    sbi->ll_dt_exp,
1706                                                    sizeof(*qctl), qctl, NULL);
1707                         break;
1708                 default:
1709                         rc = -EINVAL;
1710                         break;
1711                 }
1712
1713                 qctl->qc_cmd = cmd;
1714                 if (rc)
1715                         RETURN(rc);
1716         } else {
1717                 struct obd_quotactl *oqctl;
1718                 int oqctl_len = sizeof(*oqctl);
1719
1720                 if (LUSTRE_Q_CMD_IS_POOL(cmd))
1721                         oqctl_len += LOV_MAXPOOLNAME + 1;
1722
1723                 OBD_ALLOC(oqctl, oqctl_len);
1724                 if (oqctl == NULL)
1725                         RETURN(-ENOMEM);
1726
1727                 QCTL_COPY(oqctl, qctl);
1728                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1729                 if (rc) {
1730                         OBD_FREE(oqctl, oqctl_len);
1731                         RETURN(rc);
1732                 }
1733                 /* If QIF_SPACE is not set, client should collect the
1734                  * space usage from OSSs by itself
1735                  */
1736                 if ((cmd == Q_GETQUOTA || cmd == LUSTRE_Q_GETQUOTAPOOL) &&
1737                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1738                     !oqctl->qc_dqblk.dqb_curspace) {
1739                         struct obd_quotactl *oqctl_tmp;
1740                         int qctl_len = sizeof(*oqctl_tmp) + LOV_MAXPOOLNAME + 1;
1741
1742                         OBD_ALLOC(oqctl_tmp, qctl_len);
1743                         if (oqctl_tmp == NULL)
1744                                 GOTO(out, rc = -ENOMEM);
1745
1746                         if (cmd == LUSTRE_Q_GETQUOTAPOOL) {
1747                                 oqctl_tmp->qc_cmd = LUSTRE_Q_GETQUOTAPOOL;
1748                                 memcpy(oqctl_tmp->qc_poolname,
1749                                        qctl->qc_poolname,
1750                                        LOV_MAXPOOLNAME + 1);
1751                         } else {
1752                                 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1753                         }
1754                         oqctl_tmp->qc_id = oqctl->qc_id;
1755                         oqctl_tmp->qc_type = oqctl->qc_type;
1756
1757                         /* collect space usage from OSTs */
1758                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1759                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1760                         if (!rc || rc == -EREMOTEIO) {
1761                                 oqctl->qc_dqblk.dqb_curspace =
1762                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1763                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1764                         }
1765
1766                         /* collect space & inode usage from MDTs */
1767                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1768                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1769                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1770                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1771                         if (!rc || rc == -EREMOTEIO) {
1772                                 oqctl->qc_dqblk.dqb_curspace +=
1773                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1774                                 oqctl->qc_dqblk.dqb_curinodes =
1775                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1776                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1777                         } else {
1778                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1779                         }
1780
1781                         OBD_FREE(oqctl_tmp, qctl_len);
1782                 }
1783 out:
1784                 QCTL_COPY(qctl, oqctl);
1785                 OBD_FREE(oqctl, oqctl_len);
1786         }
1787
1788         RETURN(rc);
1789 }
1790
1791 static int ll_rmfid(struct file *file, void __user *arg)
1792 {
1793         const struct fid_array __user *ufa = arg;
1794         struct inode *inode = file_inode(file);
1795         struct ll_sb_info *sbi = ll_i2sbi(inode);
1796         struct fid_array *lfa = NULL, *lfa_new = NULL;
1797         int i, rc, *rcs = NULL;
1798         unsigned int nr;
1799         bool lfa_flag = false; /* lfa already free'ed */
1800         size_t size;
1801         ENTRY;
1802
1803         if (!capable(CAP_DAC_READ_SEARCH) &&
1804             !test_bit(LL_SBI_USER_FID2PATH, ll_i2sbi(inode)->ll_flags))
1805                 RETURN(-EPERM);
1806         /* Only need to get the buflen */
1807         if (get_user(nr, &ufa->fa_nr))
1808                 RETURN(-EFAULT);
1809         /* DoS protection */
1810         if (nr > OBD_MAX_FIDS_IN_ARRAY)
1811                 RETURN(-E2BIG);
1812
1813         size = offsetof(struct fid_array, fa_fids[nr]);
1814         OBD_ALLOC(lfa, size);
1815         if (!lfa)
1816                 RETURN(-ENOMEM);
1817         OBD_ALLOC_PTR_ARRAY(rcs, nr);
1818         if (!rcs)
1819                 GOTO(free_lfa, rc = -ENOMEM);
1820
1821         if (copy_from_user(lfa, arg, size))
1822                 GOTO(free_rcs, rc = -EFAULT);
1823
1824         /* In case of subdirectory mount, we need to make sure all the files
1825          * for which we want to remove FID are visible in the namespace.
1826          */
1827         if (!fid_is_root(&sbi->ll_root_fid)) {
1828                 int path_len = PATH_MAX, linkno;
1829                 struct getinfo_fid2path *gf;
1830                 int idx, last_idx = nr - 1;
1831
1832                 lfa_new = NULL;
1833
1834                 OBD_ALLOC(lfa_new, size);
1835                 if (!lfa_new)
1836                         GOTO(free_rcs, rc = -ENOMEM);
1837                 lfa_new->fa_nr = 0;
1838
1839                 gf = kmalloc(sizeof(*gf) + path_len + 1, GFP_NOFS);
1840                 if (!gf)
1841                         GOTO(free_lfa_new, rc = -ENOMEM);
1842
1843                 for (idx = 0; idx < nr; idx++) {
1844                         linkno = 0;
1845                         while (1) {
1846                                 memset(gf, 0, sizeof(*gf) + path_len + 1);
1847                                 gf->gf_fid = lfa->fa_fids[idx];
1848                                 gf->gf_pathlen = path_len;
1849                                 gf->gf_linkno = linkno;
1850                                 rc = __ll_fid2path(inode, gf,
1851                                                    sizeof(*gf) + gf->gf_pathlen,
1852                                                    gf->gf_pathlen);
1853                                 if (rc == -ENAMETOOLONG) {
1854                                         struct getinfo_fid2path *tmpgf;
1855
1856                                         path_len += PATH_MAX;
1857                                         tmpgf = krealloc(gf,
1858                                                      sizeof(*gf) + path_len + 1,
1859                                                      GFP_NOFS);
1860                                         if (!tmpgf) {
1861                                                 kfree(gf);
1862                                                 GOTO(free_lfa_new, rc = -ENOMEM);
1863                                         }
1864                                         gf = tmpgf;
1865                                         continue;
1866                                 }
1867                                 if (rc)
1868                                         break;
1869                                 if (gf->gf_linkno == linkno)
1870                                         break;
1871                                 linkno = gf->gf_linkno;
1872                         }
1873
1874                         if (!rc) {
1875                                 /* All the links for this fid are visible in the
1876                                  * mounted subdir. So add it to the list of fids
1877                                  * to remove.
1878                                  */
1879                                 lfa_new->fa_fids[lfa_new->fa_nr++] =
1880                                         lfa->fa_fids[idx];
1881                         } else {
1882                                 /* At least one link for this fid is not visible
1883                                  * in the mounted subdir. So add it at the end
1884                                  * of the list that will be hidden to lower
1885                                  * layers, and set -ENOENT as ret code.
1886                                  */
1887                                 lfa_new->fa_fids[last_idx] = lfa->fa_fids[idx];
1888                                 rcs[last_idx--] = rc;
1889                         }
1890                 }
1891                 kfree(gf);
1892                 OBD_FREE(lfa, size);
1893                 lfa_flag = true;
1894                 lfa = lfa_new;
1895         }
1896         if (lfa->fa_nr == 0)
1897                 GOTO(free_rcs, rc = rcs[nr - 1]);
1898
1899         /* Call mdc_iocontrol */
1900         rc = md_rmfid(ll_i2mdexp(file_inode(file)), lfa, rcs, NULL);
1901         lfa->fa_nr = nr;
1902         if (!rc) {
1903                 for (i = 0; i < nr; i++)
1904                         if (rcs[i])
1905                                 lfa->fa_fids[i].f_ver = rcs[i];
1906                 if (copy_to_user(arg, lfa, size))
1907                         rc = -EFAULT;
1908         }
1909
1910 free_lfa_new:
1911         OBD_FREE(lfa_new, size);
1912 free_rcs:
1913         OBD_FREE_PTR_ARRAY(rcs, nr);
1914 free_lfa:
1915         if (!lfa_flag)
1916                 OBD_FREE(lfa, size);
1917
1918         RETURN(rc);
1919 }
1920
1921 /* This function tries to get a single name component,
1922  * to send to the server. No actual path traversal involved,
1923  * so we limit to NAME_MAX */
1924 static char *ll_getname(const char __user *filename)
1925 {
1926         int ret = 0, len;
1927         char *tmp;
1928
1929         OBD_ALLOC(tmp, NAME_MAX + 1);
1930
1931         if (!tmp)
1932                 return ERR_PTR(-ENOMEM);
1933
1934         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1935         if (len < 0)
1936                 ret = -ENOENT;
1937         else if (len > NAME_MAX)
1938                 ret = -ENAMETOOLONG;
1939
1940         if (ret) {
1941                 OBD_FREE(tmp, NAME_MAX + 1);
1942                 tmp =  ERR_PTR(ret);
1943         }
1944         return tmp;
1945 }
1946
1947 static const char *const ladvise_names[] = LU_LADVISE_NAMES;
1948
1949 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1950
1951 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1952 {
1953         struct dentry *dentry = file_dentry(file);
1954         struct inode *inode = file_inode(file);
1955         struct ll_sb_info *sbi = ll_i2sbi(inode);
1956         struct obd_ioctl_data *data = NULL;
1957         void __user *uarg = (void __user *)arg;
1958         int rc = 0;
1959         ENTRY;
1960
1961         CDEBUG(D_VFSTRACE|D_IOCTL, "VFS Op:inode="DFID"(%pK) cmd=%x arg=%lx\n",
1962                PFID(ll_inode2fid(inode)), inode, cmd, arg);
1963
1964         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1965         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1966                 return -ENOTTY;
1967
1968         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1969         switch (cmd) {
1970         case IOC_MDC_LOOKUP: {
1971                 int namelen, len = 0;
1972                 char *filename;
1973
1974                 rc = obd_ioctl_getdata(&data, &len, uarg);
1975                 if (rc != 0)
1976                         RETURN(rc);
1977
1978                 filename = data->ioc_inlbuf1;
1979                 namelen = strlen(filename);
1980                 if (namelen < 1) {
1981                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1982                         GOTO(out_free, rc = -EINVAL);
1983                 }
1984
1985                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1986                 if (rc < 0) {
1987                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1988                                sbi->ll_fsname, namelen, filename, rc);
1989                         GOTO(out_free, rc);
1990                 }
1991 out_free:
1992                 OBD_FREE_LARGE(data, len);
1993                 return rc;
1994         }
1995         case LL_IOC_LMV_SETSTRIPE: {
1996                 struct lmv_user_md  *lum;
1997                 char *filename;
1998                 int namelen = 0;
1999                 int lumlen = 0;
2000                 umode_t mode;
2001                 bool createonly = false;
2002                 int len;
2003                 int rc;
2004
2005                 rc = obd_ioctl_getdata(&data, &len, uarg);
2006                 if (rc)
2007                         RETURN(rc);
2008
2009                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2010                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2011                         GOTO(lmv_out_free, rc = -EINVAL);
2012
2013                 filename = data->ioc_inlbuf1;
2014                 namelen = data->ioc_inllen1;
2015
2016                 if (namelen < 1) {
2017                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2018                         GOTO(lmv_out_free, rc = -EINVAL);
2019                 }
2020                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2021                 lumlen = data->ioc_inllen2;
2022
2023                 if (!lmv_user_magic_supported(lum->lum_magic)) {
2024                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
2025                                lum->lum_magic, -EINVAL);
2026                         GOTO(lmv_out_free, rc = -EINVAL);
2027                 }
2028
2029                 if ((lum->lum_magic == LMV_USER_MAGIC ||
2030                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
2031                     lumlen < sizeof(*lum)) {
2032                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
2033                                filename, lumlen, lum->lum_magic, -EINVAL);
2034                         GOTO(lmv_out_free, rc = -EINVAL);
2035                 }
2036
2037                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
2038                     lumlen < sizeof(struct lmv_foreign_md)) {
2039                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
2040                                filename, lum->lum_magic, lumlen, -EFAULT);
2041                         GOTO(lmv_out_free, rc = -EINVAL);
2042                 }
2043
2044                 mode = data->ioc_type;
2045                 createonly = data->ioc_obdo1.o_flags & OBD_FL_OBDMDEXISTS;
2046                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode,
2047                                          createonly);
2048 lmv_out_free:
2049                 OBD_FREE_LARGE(data, len);
2050                 RETURN(rc);
2051
2052         }
2053         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
2054                 struct lmv_user_md lum;
2055                 struct lmv_user_md __user *ulump = uarg;
2056                 int rc;
2057
2058                 if (copy_from_user(&lum, ulump, sizeof(lum)))
2059                         RETURN(-EFAULT);
2060
2061                 if (lum.lum_magic != LMV_USER_MAGIC)
2062                         RETURN(-EINVAL);
2063
2064                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
2065
2066                 RETURN(rc);
2067         }
2068         case LL_IOC_LOV_SETSTRIPE_NEW:
2069         case LL_IOC_LOV_SETSTRIPE: {
2070                 struct lov_user_md_v3 *lumv3 = NULL;
2071                 struct lov_user_md_v1 lumv1;
2072                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
2073                 struct lov_user_md_v1 __user *lumv1p = uarg;
2074                 struct lov_user_md_v3 __user *lumv3p = uarg;
2075                 int lum_size = 0;
2076                 int set_default = 0;
2077
2078                 BUILD_BUG_ON(sizeof(struct lov_user_md_v3) <=
2079                              sizeof(struct lov_comp_md_v1));
2080                 BUILD_BUG_ON(sizeof(*lumv3) != sizeof(*lumv3p));
2081                 /* first try with v1 which is smaller than v3 */
2082                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
2083                         RETURN(-EFAULT);
2084
2085                 if (is_root_inode(inode))
2086                         set_default = 1;
2087
2088                 switch (lumv1.lmm_magic) {
2089                 case LOV_USER_MAGIC_V3:
2090                 case LOV_USER_MAGIC_SPECIFIC:
2091                         lum_size = ll_lov_user_md_size(&lumv1);
2092                         if (lum_size < 0)
2093                                 RETURN(lum_size);
2094                         OBD_ALLOC(lumv3, lum_size);
2095                         if (!lumv3)
2096                                 RETURN(-ENOMEM);
2097                         if (copy_from_user(lumv3, lumv3p, lum_size))
2098                                 GOTO(out, rc = -EFAULT);
2099                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
2100                         break;
2101                 case LOV_USER_MAGIC_V1:
2102                         break;
2103                 default:
2104                         GOTO(out, rc = -EOPNOTSUPP);
2105                 }
2106
2107                 /* in v1 and v3 cases lumv1 points to data */
2108                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
2109 out:
2110                 if (lumv3)
2111                         OBD_FREE(lumv3, lum_size);
2112                 RETURN(rc);
2113         }
2114         case LL_IOC_LMV_GETSTRIPE: {
2115                 struct lmv_user_md __user *ulmv = uarg;
2116                 struct lmv_user_md lum;
2117                 struct ptlrpc_request *request = NULL;
2118                 union lmv_mds_md *lmm = NULL;
2119                 int lmmsize;
2120                 u64 valid = 0;
2121                 struct lmv_user_md *tmp = NULL;
2122                 int mdt_index;
2123                 int lum_size;
2124                 int stripe_count;
2125                 int max_stripe_count;
2126                 int i;
2127                 int rc;
2128
2129                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
2130                         RETURN(-EFAULT);
2131
2132                 /* get default LMV */
2133                 if (lum.lum_magic == LMV_USER_MAGIC &&
2134                     lum.lum_type != LMV_TYPE_RAW) {
2135                         rc = ll_dir_get_default_lmv(inode, &lum);
2136                         if (rc)
2137                                 RETURN(rc);
2138
2139                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
2140                                 RETURN(-EFAULT);
2141
2142                         RETURN(0);
2143                 }
2144
2145                 max_stripe_count = lum.lum_stripe_count;
2146                 /* lum_magic will indicate which stripe the ioctl will like
2147                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
2148                  * is for default LMV stripe */
2149                 if (lum.lum_magic == LMV_MAGIC_V1)
2150                         valid |= OBD_MD_MEA;
2151                 else if (lum.lum_magic == LMV_USER_MAGIC)
2152                         valid |= OBD_MD_DEFAULT_MEA;
2153                 else
2154                         RETURN(-EINVAL);
2155
2156                 rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmmsize,
2157                                               &request, NULL, valid);
2158                 if (rc != 0)
2159                         GOTO(finish_req, rc);
2160
2161                 /* get default LMV in raw mode */
2162                 if (lum.lum_magic == LMV_USER_MAGIC) {
2163                         if (copy_to_user(ulmv, lmm, lmmsize))
2164                                 GOTO(finish_req, rc = -EFAULT);
2165                         GOTO(finish_req, rc);
2166                 }
2167
2168                 /* if foreign LMV case, fake stripes number */
2169                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
2170                         struct lmv_foreign_md *lfm;
2171
2172                         lfm = (struct lmv_foreign_md *)lmm;
2173                         if (lfm->lfm_length < XATTR_SIZE_MAX -
2174                             offsetof(typeof(*lfm), lfm_value)) {
2175                                 __u32 size = lfm->lfm_length +
2176                                              offsetof(typeof(*lfm), lfm_value);
2177
2178                                 stripe_count = lmv_foreign_to_md_stripes(size);
2179                         } else {
2180                                 CERROR("%s: invalid %d foreign size returned: rc = %d\n",
2181                                        sbi->ll_fsname, lfm->lfm_length,
2182                                        -EINVAL);
2183                                 return -EINVAL;
2184                         }
2185                 } else {
2186                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
2187                 }
2188                 if (max_stripe_count < stripe_count) {
2189                         lum.lum_stripe_count = stripe_count;
2190                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
2191                                 GOTO(finish_req, rc = -EFAULT);
2192                         GOTO(finish_req, rc = -E2BIG);
2193                 }
2194
2195                 /* enough room on user side and foreign case */
2196                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
2197                         struct lmv_foreign_md *lfm;
2198                         __u32 size;
2199
2200                         lfm = (struct lmv_foreign_md *)lmm;
2201                         size = lfm->lfm_length +
2202                                offsetof(struct lmv_foreign_md, lfm_value);
2203                         if (copy_to_user(ulmv, lfm, size))
2204                                 GOTO(finish_req, rc = -EFAULT);
2205                         GOTO(finish_req, rc);
2206                 }
2207
2208                 lum_size = lmv_user_md_size(stripe_count,
2209                                             LMV_USER_MAGIC_SPECIFIC);
2210                 OBD_ALLOC(tmp, lum_size);
2211                 if (tmp == NULL)
2212                         GOTO(finish_req, rc = -ENOMEM);
2213
2214                 mdt_index = ll_get_mdt_idx(inode);
2215                 if (mdt_index < 0)
2216                         GOTO(out_tmp, rc = -ENOMEM);
2217
2218                 tmp->lum_magic = LMV_MAGIC_V1;
2219                 tmp->lum_stripe_count = 0;
2220                 tmp->lum_stripe_offset = mdt_index;
2221                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
2222                 for (i = 0; i < stripe_count; i++) {
2223                         struct lu_fid   fid;
2224
2225                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
2226                         if (fid_is_sane(&fid)) {
2227                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
2228                                 if (mdt_index < 0)
2229                                         GOTO(out_tmp, rc = mdt_index);
2230
2231                                 tmp->lum_objects[i].lum_mds = mdt_index;
2232                                 tmp->lum_objects[i].lum_fid = fid;
2233                         }
2234
2235                         tmp->lum_stripe_count++;
2236                 }
2237
2238                 if (copy_to_user(ulmv, tmp, lum_size))
2239                         GOTO(out_tmp, rc = -EFAULT);
2240 out_tmp:
2241                 OBD_FREE(tmp, lum_size);
2242 finish_req:
2243                 ptlrpc_req_finished(request);
2244                 return rc;
2245         }
2246         case LL_IOC_REMOVE_ENTRY: {
2247                 char            *filename = NULL;
2248                 int              namelen = 0;
2249                 int              rc;
2250
2251                 /* Here is a little hack to avoid sending REINT_RMENTRY to
2252                  * unsupported server, which might crash the server(LU-2730),
2253                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
2254                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
2255                  * server will support REINT_RMENTRY XXX*/
2256                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
2257                         RETURN(-EOPNOTSUPP);
2258
2259                 filename = ll_getname(uarg);
2260                 if (IS_ERR(filename))
2261                         RETURN(PTR_ERR(filename));
2262
2263                 namelen = strlen(filename);
2264                 if (namelen < 1)
2265                         GOTO(out_rmdir, rc = -EINVAL);
2266
2267                 rc = ll_rmdir_entry(inode, filename, namelen);
2268 out_rmdir:
2269                 if (filename)
2270                         ll_putname(filename);
2271                 RETURN(rc);
2272         }
2273         case LL_IOC_RMFID:
2274                 RETURN(ll_rmfid(file, uarg));
2275         case LL_IOC_LOV_SWAP_LAYOUTS:
2276                 RETURN(-EPERM);
2277         case LL_IOC_LOV_GETSTRIPE:
2278         case LL_IOC_LOV_GETSTRIPE_NEW:
2279         case LL_IOC_MDC_GETINFO_V1:
2280         case LL_IOC_MDC_GETINFO_V2:
2281         case IOC_MDC_GETFILEINFO_V1:
2282         case IOC_MDC_GETFILEINFO_V2:
2283         case IOC_MDC_GETFILESTRIPE: {
2284                 struct ptlrpc_request *request = NULL;
2285                 struct ptlrpc_request *root_request = NULL;
2286                 struct lov_user_md __user *lump;
2287                 struct lov_mds_md *lmm = NULL;
2288                 struct mdt_body *body;
2289                 char *filename = NULL;
2290                 lstat_t __user *statp = NULL;
2291                 lstatx_t __user *stxp = NULL;
2292                 __u64 __user *flagsp = NULL;
2293                 __u32 __user *lmmsizep = NULL;
2294                 struct lu_fid __user *fidp = NULL;
2295                 int lmmsize;
2296                 bool api32;
2297
2298                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2299                     cmd == IOC_MDC_GETFILEINFO_V2 ||
2300                     cmd == IOC_MDC_GETFILESTRIPE) {
2301                         filename = ll_getname(uarg);
2302                         if (IS_ERR(filename))
2303                                 RETURN(PTR_ERR(filename));
2304
2305                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
2306                                                       &lmmsize, &request);
2307                 } else {
2308                         rc = ll_dir_getstripe_default(inode, (void **)&lmm,
2309                                                       &lmmsize, &request,
2310                                                       &root_request, 0);
2311                 }
2312
2313                 if (request) {
2314                         body = req_capsule_server_get(&request->rq_pill,
2315                                                       &RMF_MDT_BODY);
2316                         LASSERT(body != NULL);
2317                 } else {
2318                         GOTO(out_req, rc);
2319                 }
2320
2321                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO_V1 ||
2322                                        cmd == LL_IOC_MDC_GETINFO_V1 ||
2323                                        cmd == IOC_MDC_GETFILEINFO_V2 ||
2324                                        cmd == LL_IOC_MDC_GETINFO_V2)) {
2325                         lmmsize = 0;
2326                         rc = 0;
2327                 }
2328
2329                 if (rc < 0)
2330                         GOTO(out_req, rc);
2331
2332                 if (cmd == IOC_MDC_GETFILESTRIPE ||
2333                     cmd == LL_IOC_LOV_GETSTRIPE ||
2334                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
2335                         lump = uarg;
2336                 } else if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2337                            cmd == LL_IOC_MDC_GETINFO_V1){
2338                         struct lov_user_mds_data_v1 __user *lmdp;
2339
2340                         lmdp = uarg;
2341                         statp = &lmdp->lmd_st;
2342                         lump = &lmdp->lmd_lmm;
2343                 } else {
2344                         struct lov_user_mds_data __user *lmdp;
2345
2346                         lmdp = uarg;
2347                         fidp = &lmdp->lmd_fid;
2348                         stxp = &lmdp->lmd_stx;
2349                         flagsp = &lmdp->lmd_flags;
2350                         lmmsizep = &lmdp->lmd_lmmsize;
2351                         lump = &lmdp->lmd_lmm;
2352                 }
2353
2354                 if (lmmsize == 0) {
2355                         /* If the file has no striping then zero out *lump so
2356                          * that the caller isn't confused by garbage. */
2357                         if (clear_user(lump, sizeof(*lump)))
2358                                 GOTO(out_req, rc = -EFAULT);
2359                 } else if (copy_to_user(lump, lmm, lmmsize)) {
2360                         if (copy_to_user(lump, lmm, sizeof(*lump)))
2361                                 GOTO(out_req, rc = -EFAULT);
2362                         rc = -EOVERFLOW;
2363                 }
2364                 api32 = test_bit(LL_SBI_32BIT_API, sbi->ll_flags);
2365
2366                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2367                     cmd == LL_IOC_MDC_GETINFO_V1) {
2368                         lstat_t st = { 0 };
2369
2370                         st.st_dev       = inode->i_sb->s_dev;
2371                         st.st_mode      = body->mbo_mode;
2372                         st.st_nlink     = body->mbo_nlink;
2373                         st.st_uid       = body->mbo_uid;
2374                         st.st_gid       = body->mbo_gid;
2375                         st.st_rdev      = body->mbo_rdev;
2376                         if (llcrypt_require_key(inode) == -ENOKEY)
2377                                 st.st_size = round_up(st.st_size,
2378                                                    LUSTRE_ENCRYPTION_UNIT_SIZE);
2379                         else
2380                                 st.st_size = body->mbo_size;
2381                         st.st_blksize   = PAGE_SIZE;
2382                         st.st_blocks    = body->mbo_blocks;
2383                         st.st_atime     = body->mbo_atime;
2384                         st.st_mtime     = body->mbo_mtime;
2385                         st.st_ctime     = body->mbo_ctime;
2386                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
2387                                                            api32);
2388
2389                         if (copy_to_user(statp, &st, sizeof(st)))
2390                                 GOTO(out_req, rc = -EFAULT);
2391                 } else if (cmd == IOC_MDC_GETFILEINFO_V2 ||
2392                            cmd == LL_IOC_MDC_GETINFO_V2) {
2393                         lstatx_t stx = { 0 };
2394                         __u64 valid = body->mbo_valid;
2395
2396                         stx.stx_blksize = PAGE_SIZE;
2397                         stx.stx_nlink = body->mbo_nlink;
2398                         stx.stx_uid = body->mbo_uid;
2399                         stx.stx_gid = body->mbo_gid;
2400                         stx.stx_mode = body->mbo_mode;
2401                         stx.stx_ino = cl_fid_build_ino(&body->mbo_fid1,
2402                                                        api32);
2403                         if (llcrypt_require_key(inode) == -ENOKEY)
2404                                 stx.stx_size = round_up(stx.stx_size,
2405                                                    LUSTRE_ENCRYPTION_UNIT_SIZE);
2406                         else
2407                                 stx.stx_size = body->mbo_size;
2408                         stx.stx_blocks = body->mbo_blocks;
2409                         stx.stx_atime.tv_sec = body->mbo_atime;
2410                         stx.stx_ctime.tv_sec = body->mbo_ctime;
2411                         stx.stx_mtime.tv_sec = body->mbo_mtime;
2412                         stx.stx_btime.tv_sec = body->mbo_btime;
2413                         stx.stx_rdev_major = MAJOR(body->mbo_rdev);
2414                         stx.stx_rdev_minor = MINOR(body->mbo_rdev);
2415                         stx.stx_dev_major = MAJOR(inode->i_sb->s_dev);
2416                         stx.stx_dev_minor = MINOR(inode->i_sb->s_dev);
2417                         stx.stx_mask |= STATX_BASIC_STATS | STATX_BTIME;
2418
2419                         stx.stx_attributes_mask = STATX_ATTR_IMMUTABLE |
2420                                                   STATX_ATTR_APPEND;
2421 #ifdef HAVE_LUSTRE_CRYPTO
2422                         stx.stx_attributes_mask |= STATX_ATTR_ENCRYPTED;
2423 #endif
2424                         if (body->mbo_valid & OBD_MD_FLFLAGS) {
2425                                 stx.stx_attributes |= body->mbo_flags;
2426                                 /* if Lustre specific LUSTRE_ENCRYPT_FL flag is
2427                                  * set, also set ext4 equivalent to please statx
2428                                  */
2429                                 if (body->mbo_flags & LUSTRE_ENCRYPT_FL)
2430                                      stx.stx_attributes |= STATX_ATTR_ENCRYPTED;
2431                         }
2432
2433                         /* For a striped directory, the size and blocks returned
2434                          * from MDT is not correct.
2435                          * The size and blocks are aggregated by client across
2436                          * all stripes.
2437                          * Thus for a striped directory, do not return the valid
2438                          * FLSIZE and FLBLOCKS flags to the caller.
2439                          * However, this whould be better decided by the MDS
2440                          * instead of the client.
2441                          */
2442                         if (cmd == LL_IOC_MDC_GETINFO_V2 &&
2443                             ll_dir_striped(inode))
2444                                 valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
2445
2446                         if (flagsp && copy_to_user(flagsp, &valid,
2447                                                    sizeof(*flagsp)))
2448                                 GOTO(out_req, rc = -EFAULT);
2449
2450                         if (fidp && copy_to_user(fidp, &body->mbo_fid1,
2451                                                  sizeof(*fidp)))
2452                                 GOTO(out_req, rc = -EFAULT);
2453
2454                         if (!(valid & OBD_MD_FLSIZE))
2455                                 stx.stx_mask &= ~STATX_SIZE;
2456                         if (!(valid & OBD_MD_FLBLOCKS))
2457                                 stx.stx_mask &= ~STATX_BLOCKS;
2458
2459                         if (stxp && copy_to_user(stxp, &stx, sizeof(stx)))
2460                                 GOTO(out_req, rc = -EFAULT);
2461
2462                         if (lmmsizep && copy_to_user(lmmsizep, &lmmsize,
2463                                                      sizeof(*lmmsizep)))
2464                                 GOTO(out_req, rc = -EFAULT);
2465                 }
2466
2467                 EXIT;
2468 out_req:
2469                 ptlrpc_req_finished(request);
2470                 ptlrpc_req_finished(root_request);
2471                 if (filename)
2472                         ll_putname(filename);
2473                 return rc;
2474         }
2475         case OBD_IOC_QUOTACTL: {
2476                 struct if_quotactl *qctl;
2477                 int qctl_len = sizeof(*qctl) + LOV_MAXPOOLNAME + 1;
2478
2479                 OBD_ALLOC(qctl, qctl_len);
2480                 if (!qctl)
2481                         RETURN(-ENOMEM);
2482
2483                 if (copy_from_user(qctl, uarg, sizeof(*qctl)))
2484                         GOTO(out_quotactl, rc = -EFAULT);
2485
2486                 if (LUSTRE_Q_CMD_IS_POOL(qctl->qc_cmd)) {
2487                         char __user *from = uarg +
2488                                         offsetof(typeof(*qctl), qc_poolname);
2489                         if (copy_from_user(qctl->qc_poolname, from,
2490                                            LOV_MAXPOOLNAME + 1))
2491                                 GOTO(out_quotactl, rc = -EFAULT);
2492                 }
2493
2494                 rc = quotactl_ioctl(inode->i_sb, qctl);
2495                 if ((rc == 0 || rc == -ENODATA) &&
2496                     copy_to_user(uarg, qctl, sizeof(*qctl)))
2497                         rc = -EFAULT;
2498 out_quotactl:
2499                 OBD_FREE(qctl, qctl_len);
2500                 RETURN(rc);
2501         }
2502         case LL_IOC_GETOBDCOUNT: {
2503                 u32 count, vallen;
2504                 struct obd_export *exp;
2505
2506                 if (copy_from_user(&count, uarg, sizeof(count)))
2507                         RETURN(-EFAULT);
2508
2509                 /* get ost count when count is zero, get mdt count otherwise */
2510                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
2511                 vallen = sizeof(count);
2512                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
2513                                   KEY_TGT_COUNT, &vallen, &count);
2514                 if (rc) {
2515                         CERROR("%s: get target count failed: rc = %d\n",
2516                                sbi->ll_fsname, rc);
2517                         RETURN(rc);
2518                 }
2519
2520                 if (copy_to_user(uarg, &count, sizeof(count)))
2521                         RETURN(-EFAULT);
2522
2523                 RETURN(0);
2524         }
2525         case LL_IOC_GET_CONNECT_FLAGS:
2526                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, uarg));
2527         case LL_IOC_FID2MDTIDX: {
2528                 struct obd_export *exp = ll_i2mdexp(inode);
2529                 struct lu_fid fid;
2530                 __u32 index;
2531
2532                 if (copy_from_user(&fid, uarg, sizeof(fid)))
2533                         RETURN(-EFAULT);
2534
2535                 /* Call mdc_iocontrol */
2536                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
2537                                    (__u32 __user *)&index);
2538                 if (rc != 0)
2539                         RETURN(rc);
2540
2541                 RETURN(index);
2542         }
2543         case LL_IOC_HSM_REQUEST: {
2544                 struct hsm_user_request *hur;
2545                 ssize_t totalsize;
2546
2547                 OBD_ALLOC_PTR(hur);
2548                 if (hur == NULL)
2549                         RETURN(-ENOMEM);
2550
2551                 /* We don't know the true size yet; copy the fixed-size part */
2552                 if (copy_from_user(hur, uarg, sizeof(*hur))) {
2553                         OBD_FREE_PTR(hur);
2554                         RETURN(-EFAULT);
2555                 }
2556
2557                 /* Compute the whole struct size */
2558                 totalsize = hur_len(hur);
2559                 OBD_FREE_PTR(hur);
2560                 if (totalsize < 0)
2561                         RETURN(-E2BIG);
2562
2563                 /* Final size will be more than double totalsize */
2564                 if (totalsize >= MDS_MAXREQSIZE / 3)
2565                         RETURN(-E2BIG);
2566
2567                 OBD_ALLOC_LARGE(hur, totalsize);
2568                 if (hur == NULL)
2569                         RETURN(-ENOMEM);
2570
2571                 /* Copy the whole struct */
2572                 if (copy_from_user(hur, uarg, totalsize))
2573                         GOTO(out_hur, rc = -EFAULT);
2574
2575                 if (hur->hur_request.hr_action == HUA_RELEASE) {
2576                         const struct lu_fid *fid;
2577                         struct inode *f;
2578                         int i;
2579
2580                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
2581                                 fid = &hur->hur_user_item[i].hui_fid;
2582                                 f = search_inode_for_lustre(inode->i_sb, fid);
2583                                 if (IS_ERR(f)) {
2584                                         rc = PTR_ERR(f);
2585                                         break;
2586                                 }
2587
2588                                 rc = ll_hsm_release(f);
2589                                 iput(f);
2590                                 if (rc != 0)
2591                                         break;
2592                         }
2593                 } else {
2594                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
2595                                            hur, NULL);
2596                 }
2597 out_hur:
2598                 OBD_FREE_LARGE(hur, totalsize);
2599
2600                 RETURN(rc);
2601         }
2602         case LL_IOC_HSM_PROGRESS: {
2603                 struct hsm_progress_kernel hpk;
2604                 struct hsm_progress hp;
2605
2606                 if (copy_from_user(&hp, uarg, sizeof(hp)))
2607                         RETURN(-EFAULT);
2608
2609                 hpk.hpk_fid = hp.hp_fid;
2610                 hpk.hpk_cookie = hp.hp_cookie;
2611                 hpk.hpk_extent = hp.hp_extent;
2612                 hpk.hpk_flags = hp.hp_flags;
2613                 hpk.hpk_errval = hp.hp_errval;
2614                 hpk.hpk_data_version = 0;
2615
2616                 /* File may not exist in Lustre; all progress
2617                  * reported to Lustre root */
2618                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
2619                                    NULL);
2620                 RETURN(rc);
2621         }
2622         case LL_IOC_HSM_CT_START:
2623                 if (!capable(CAP_SYS_ADMIN))
2624                         RETURN(-EPERM);
2625
2626                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp, uarg);
2627                 RETURN(rc);
2628
2629         case LL_IOC_HSM_COPY_START: {
2630                 struct hsm_copy *copy;
2631                 int rc;
2632
2633                 OBD_ALLOC_PTR(copy);
2634                 if (copy == NULL)
2635                         RETURN(-ENOMEM);
2636                 if (copy_from_user(copy, uarg, sizeof(*copy))) {
2637                         OBD_FREE_PTR(copy);
2638                         RETURN(-EFAULT);
2639                 }
2640
2641                 rc = ll_ioc_copy_start(inode->i_sb, copy);
2642                 if (copy_to_user(uarg, copy, sizeof(*copy)))
2643                         rc = -EFAULT;
2644
2645                 OBD_FREE_PTR(copy);
2646                 RETURN(rc);
2647         }
2648         case LL_IOC_HSM_COPY_END: {
2649                 struct hsm_copy *copy;
2650                 int rc;
2651
2652                 OBD_ALLOC_PTR(copy);
2653                 if (copy == NULL)
2654                         RETURN(-ENOMEM);
2655                 if (copy_from_user(copy, uarg, sizeof(*copy))) {
2656                         OBD_FREE_PTR(copy);
2657                         RETURN(-EFAULT);
2658                 }
2659
2660                 rc = ll_ioc_copy_end(inode->i_sb, copy);
2661                 if (copy_to_user(uarg, copy, sizeof(*copy)))
2662                         rc = -EFAULT;
2663
2664                 OBD_FREE_PTR(copy);
2665                 RETURN(rc);
2666         }
2667         case LL_IOC_MIGRATE: {
2668                 struct lmv_user_md *lum;
2669                 int len;
2670                 char *filename;
2671                 int namelen = 0;
2672                 __u32 flags;
2673                 int rc;
2674
2675                 rc = obd_ioctl_getdata(&data, &len, uarg);
2676                 if (rc)
2677                         RETURN(rc);
2678
2679                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2680                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2681                         GOTO(migrate_free, rc = -EINVAL);
2682
2683                 filename = data->ioc_inlbuf1;
2684                 namelen = data->ioc_inllen1;
2685                 flags = data->ioc_type;
2686
2687                 if (namelen < 1 || namelen != strlen(filename) + 1) {
2688                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2689                         GOTO(migrate_free, rc = -EINVAL);
2690                 }
2691
2692                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2693                 if (lum->lum_magic != LMV_USER_MAGIC &&
2694                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
2695                         rc = -EINVAL;
2696                         CERROR("%s: wrong lum magic %x: rc = %d\n",
2697                                filename, lum->lum_magic, rc);
2698                         GOTO(migrate_free, rc);
2699                 }
2700
2701                 rc = ll_migrate(inode, file, lum, filename, flags);
2702 migrate_free:
2703                 OBD_FREE_LARGE(data, len);
2704
2705                 RETURN(rc);
2706         }
2707         case LL_IOC_LADVISE2: {
2708                 struct llapi_lu_ladvise2 *ladvise;
2709
2710                 OBD_ALLOC_PTR(ladvise);
2711                 if (ladvise == NULL)
2712                         RETURN(-ENOMEM);
2713
2714                 if (copy_from_user(ladvise, uarg, sizeof(*ladvise)))
2715                         GOTO(out_ladvise, rc = -EFAULT);
2716
2717                 switch (ladvise->lla_advice) {
2718                 case LU_LADVISE_AHEAD:
2719                         if (ladvise->lla_start >= ladvise->lla_end) {
2720                                 CDEBUG(D_VFSTRACE,
2721                                        "%s: Invalid range (%llu %llu) for %s\n",
2722                                        sbi->ll_fsname, ladvise->lla_start,
2723                                        ladvise->lla_end,
2724                                        ladvise_names[ladvise->lla_advice]);
2725                                 GOTO(out_ladvise, rc = -EINVAL);
2726                         }
2727
2728                         /*
2729                          * Currently we only support name indexing format
2730                          * ahead operations.
2731                          */
2732                         if (ladvise->lla_ahead_mode != LU_AH_NAME_INDEX) {
2733                                 CDEBUG(D_VFSTRACE,
2734                                        "%s: Invalid access mode (%d) for %s\n",
2735                                        sbi->ll_fsname, ladvise->lla_ahead_mode,
2736                                        ladvise_names[ladvise->lla_advice]);
2737                                 GOTO(out_ladvise, rc = -EINVAL);
2738                         }
2739
2740                         /* Currently we only support stat-ahead operations. */
2741                         if (!(ladvise->lla_access_flags & ACCESS_FL_STAT)) {
2742                                 CDEBUG(D_VFSTRACE,
2743                                        "%s: Invalid access flags (%x) for %s\n",
2744                                        sbi->ll_fsname,
2745                                        ladvise->lla_access_flags,
2746                                        ladvise_names[ladvise->lla_advice]);
2747                                 GOTO(out_ladvise, rc = -EINVAL);
2748                         }
2749
2750                         rc = ll_ioctl_ahead(file, ladvise);
2751                         break;
2752                 default:
2753                         rc = -EINVAL;
2754                 }
2755 out_ladvise:
2756                 OBD_FREE_PTR(ladvise);
2757                 RETURN(rc);
2758         }
2759         case LL_IOC_PCC_DETACH_BY_FID: {
2760                 struct lu_pcc_detach_fid *detach;
2761                 struct lu_fid *fid;
2762                 struct inode *inode2;
2763                 unsigned long ino;
2764
2765                 OBD_ALLOC_PTR(detach);
2766                 if (detach == NULL)
2767                         RETURN(-ENOMEM);
2768
2769                 if (copy_from_user(detach, uarg, sizeof(*detach)))
2770                         GOTO(out_detach, rc = -EFAULT);
2771
2772                 fid = &detach->pccd_fid;
2773                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2774                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2775                 if (inode2 == NULL)
2776                         /* Target inode is not in inode cache, and PCC file
2777                          * has aleady released, return immdiately.
2778                          */
2779                         GOTO(out_detach, rc = 0);
2780
2781                 if (!S_ISREG(inode2->i_mode))
2782                         GOTO(out_iput, rc = -EINVAL);
2783
2784                 if (!inode_owner_or_capable(&nop_mnt_idmap, inode2))
2785                         GOTO(out_iput, rc = -EPERM);
2786
2787                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2788 out_iput:
2789                 iput(inode2);
2790 out_detach:
2791                 OBD_FREE_PTR(detach);
2792                 RETURN(rc);
2793         }
2794         default:
2795                 rc = ll_iocontrol(inode, file, cmd, uarg);
2796                 if (rc != -ENOTTY)
2797                         RETURN(rc);
2798                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL, uarg));
2799         }
2800 }
2801
2802 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2803 {
2804         struct inode *inode = file->f_mapping->host;
2805         struct ll_file_data *fd = file->private_data;
2806         struct ll_sb_info *sbi = ll_i2sbi(inode);
2807         int api32 = ll_need_32bit_api(sbi);
2808         loff_t ret = -EINVAL;
2809         ENTRY;
2810
2811         ll_inode_lock(inode);
2812         switch (origin) {
2813         case SEEK_SET:
2814                 break;
2815         case SEEK_CUR:
2816                 offset += file->f_pos;
2817                 break;
2818         case SEEK_END:
2819                 if (offset > 0)
2820                         GOTO(out, ret);
2821                 if (api32)
2822                         offset += LL_DIR_END_OFF_32BIT;
2823                 else
2824                         offset += LL_DIR_END_OFF;
2825                 break;
2826         default:
2827                 GOTO(out, ret);
2828         }
2829
2830         if (offset >= 0 &&
2831             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2832              (!api32 && offset <= LL_DIR_END_OFF))) {
2833                 if (offset != file->f_pos) {
2834                         bool hash64;
2835
2836                         hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
2837                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2838                             (!api32 && offset == LL_DIR_END_OFF))
2839                                 fd->lfd_pos = MDS_DIR_END_OFF;
2840                         else if (api32 && hash64)
2841                                 fd->lfd_pos = offset << 32;
2842                         else
2843                                 fd->lfd_pos = offset;
2844                         file->f_pos = offset;
2845                         file->f_version = 0;
2846                 }
2847                 ret = offset;
2848         }
2849         GOTO(out, ret);
2850
2851 out:
2852         ll_inode_unlock(inode);
2853         return ret;
2854 }
2855
2856 static int ll_dir_open(struct inode *inode, struct file *file)
2857 {
2858         ENTRY;
2859         RETURN(ll_file_open(inode, file));
2860 }
2861
2862 static int ll_dir_release(struct inode *inode, struct file *file)
2863 {
2864         ENTRY;
2865         RETURN(ll_file_release(inode, file));
2866 }
2867
2868 /* notify error if partially read striped directory */
2869 static int ll_dir_flush(struct file *file, fl_owner_t id)
2870 {
2871         struct ll_file_data *lfd = file->private_data;
2872         int rc = lfd->fd_partial_readdir_rc;
2873
2874         lfd->fd_partial_readdir_rc = 0;
2875
2876         return rc;
2877 }
2878
2879 const struct file_operations ll_dir_operations = {
2880         .llseek         = ll_dir_seek,
2881         .open           = ll_dir_open,
2882         .release        = ll_dir_release,
2883         .read           = generic_read_dir,
2884 #ifdef HAVE_DIR_CONTEXT
2885         .iterate_shared = ll_iterate,
2886 #else
2887         .readdir        = ll_readdir,
2888 #endif
2889         .unlocked_ioctl = ll_dir_ioctl,
2890         .fsync          = ll_fsync,
2891         .flush          = ll_dir_flush,
2892 };