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          */
 171         if (inode && ll_dir_striped(inode)) {
 172                 __free_page(page);
 173                 return;
 174         }
 175
 176         if (remove) {
 177                 lock_page(page);
 178                 if (likely(page->mapping != NULL))
 179                         cfs_delete_from_page_cache(page);
 180                 unlock_page(page);
 181         }
 182         put_page(page);
 183 }
 184
 185 #ifdef HAVE_DIR_CONTEXT
 186 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 187                 struct dir_context *ctx, int *partial_readdir_rc)
 188 {
 189 #else
 190 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 191                 void *cookie, filldir_t filldir, int *partial_readdir_rc)
 192 {
 193 #endif
 194         struct ll_sb_info *sbi = ll_i2sbi(inode);
 195         __u64 pos = *ppos;
 196         bool is_api32 = ll_need_32bit_api(sbi);
 197         bool is_hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
 198         struct page *page;
 199         bool done = false;
 200         struct llcrypt_str lltr = LLTR_INIT(NULL, 0);
 201         int rc = 0;
 202
 203         ENTRY;
 204
 205         if (IS_ENCRYPTED(inode)) {
 206                 rc = llcrypt_fname_alloc_buffer(inode, NAME_MAX, &lltr);
 207                 if (rc < 0)
 208                         RETURN(rc);
 209         }
 210
 211         page = ll_get_dir_page(inode, op_data, pos, partial_readdir_rc);
 212
 213         while (rc == 0 && !done) {
 214                 struct lu_dirpage *dp;
 215                 struct lu_dirent  *ent;
 216                 __u64 hash;
 217                 __u64 next;
 218
 219                 if (IS_ERR(page)) {
 220                         rc = PTR_ERR(page);
 221                         break;
 222                 }
 223
 224                 hash = MDS_DIR_END_OFF;
 225                 dp = page_address(page);
 226                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 227                      ent = lu_dirent_next(ent)) {
 228                         __u16          type;
 229                         int            namelen;
 230                         struct lu_fid  fid;
 231                         __u64          lhash;
 232                         __u64          ino;
 233
 234                         hash = le64_to_cpu(ent->lde_hash);
 235                         if (hash < pos) /* Skip until we find target hash */
 236                                 continue;
 237
 238                         namelen = le16_to_cpu(ent->lde_namelen);
 239                         if (namelen == 0) /* Skip dummy record */
 240                                 continue;
 241
 242                         if (is_api32 && is_hash64)
 243                                 lhash = hash >> 32;
 244                         else
 245                                 lhash = hash;
 246                         fid_le_to_cpu(&fid, &ent->lde_fid);
 247                         ino = cl_fid_build_ino(&fid, is_api32);
 248                         type = S_DT(lu_dirent_type_get(ent));
 249                         /* For ll_nfs_get_name_filldir(), it will try to access
 250                          * 'ent' through 'lde_name', so the parameter 'name'
 251                          * for 'filldir()' must be part of the 'ent'.
 252                          */
 253 #ifdef HAVE_DIR_CONTEXT
 254                         ctx->pos = lhash;
 255                         if (!IS_ENCRYPTED(inode)) {
 256                                 done = !dir_emit(ctx, ent->lde_name, namelen,
 257                                                  ino, type);
 258                         } else {
 259                                 /* Directory is encrypted */
 260                                 int save_len = lltr.len;
 261                                 struct llcrypt_str de_name =
 262                                         LLTR_INIT(ent->lde_name, namelen);
 263
 264                                 rc = ll_fname_disk_to_usr(inode, 0, 0, &de_name,
 265                                                           &lltr, &fid);
 266                                 de_name = lltr;
 267                                 lltr.len = save_len;
 268                                 if (rc) {
 269                                         done = 1;
 270                                         break;
 271                                 }
 272                                 done = !dir_emit(ctx, de_name.name, de_name.len,
 273                                                  ino, type);
 274                         }
 275 #else
 276                         /* HAVE_DIR_CONTEXT is defined from kernel 3.11, whereas
 277                          * IS_ENCRYPTED is brought by kernel 4.14.
 278                          * So there is no need to handle encryption case here.
 279                          */
 280                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 281                                        ino, type);
 282 #endif
 283                 }
 284
 285                 if (done) {
 286                         pos = hash;
 287                         ll_release_page(inode, page, false);
 288                         break;
 289                 }
 290
 291                 next = le64_to_cpu(dp->ldp_hash_end);
 292                 pos = next;
 293                 if (pos == MDS_DIR_END_OFF) {
 294                         /* End of directory reached. */
 295                         done = 1;
 296                         ll_release_page(inode, page, false);
 297                 } else {
 298                         /* Normal case: continue to the next page.*/
 299                         ll_release_page(inode, page,
 300                                         le32_to_cpu(dp->ldp_flags) &
 301                                         LDF_COLLIDE);
 302                         next = pos;
 303                         page = ll_get_dir_page(inode, op_data, pos,
 304                                                partial_readdir_rc);
 305                 }
 306         }
 307 #ifdef HAVE_DIR_CONTEXT
 308         ctx->pos = pos;
 309 #else
 310         *ppos = pos;
 311 #endif
 312         llcrypt_fname_free_buffer(&lltr);
 313         RETURN(rc);
 314 }
 315
 316 #ifdef HAVE_DIR_CONTEXT
 317 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 318 #else
 319 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 320 #endif
 321 {
 322         struct inode *inode = file_inode(filp);
 323         struct ll_file_data *lfd = filp->private_data;
 324         struct ll_sb_info *sbi = ll_i2sbi(inode);
 325         bool hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
 326         int api32 = ll_need_32bit_api(sbi);
 327         struct md_op_data *op_data;
 328         struct lu_fid pfid = { 0 };
 329         ktime_t kstart = ktime_get();
 330         /* result of possible partial readdir */
 331         int partial_readdir_rc = 0;
 332         __u64 pos;
 333         int rc;
 334
 335         ENTRY;
 336
 337         LASSERT(lfd != NULL);
 338         pos = lfd->lfd_pos;
 339
 340         CDEBUG(D_VFSTRACE,
 341                "VFS Op:inode="DFID"(%p) pos/size%lu/%llu 32bit_api %d\n",
 342                PFID(ll_inode2fid(inode)),
 343                inode, (unsigned long)pos, i_size_read(inode), api32);
 344
 345         if (IS_ENCRYPTED(inode)) {
 346                 rc = llcrypt_prepare_readdir(inode);
 347                 if (rc && rc != -ENOKEY)
 348                         GOTO(out, rc);
 349         }
 350
 351         if (pos == MDS_DIR_END_OFF)
 352                 /* end-of-file. */
 353                 GOTO(out, rc = 0);
 354
 355         if (unlikely(ll_dir_striped(inode))) {
 356                 struct dentry *parent = dget_parent(file_dentry(filp));
 357                 struct inode *i_dir = d_inode(parent);
 358
 359                 /* Only needed for striped dir to fill ..see lmv_read_page() */
 360                 if (i_dir) {
 361                         struct obd_export *exp = ll_i2mdexp(i_dir);
 362                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 363
 364                         if (ll_have_md_lock(exp, i_dir, &ibits, LCK_MINMODE))
 365                                 pfid = *ll_inode2fid(i_dir);
 366                 }
 367                 dput(parent);
 368
 369                 /* If it can not find in cache, do lookup on the master obj */
 370                 if (fid_is_zero(&pfid)) {
 371                         rc = ll_dir_get_parent_fid(inode, &pfid);
 372                         if (rc != 0)
 373                                 RETURN(rc);
 374                 }
 375         }
 376
 377         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 378                                      LUSTRE_OPC_ANY, inode);
 379         if (IS_ERR(op_data))
 380                 GOTO(out, rc = PTR_ERR(op_data));
 381
 382         /* foreign dirs are browsed out of Lustre */
 383         if (unlikely(lmv_dir_foreign(op_data->op_lso1))) {
 384                 ll_finish_md_op_data(op_data);
 385                 RETURN(-ENODATA);
 386         }
 387
 388         op_data->op_fid3 = pfid;
 389
 390 #ifdef HAVE_DIR_CONTEXT
 391         ctx->pos = pos;
 392         rc = ll_dir_read(inode, &pos, op_data, ctx, &partial_readdir_rc);
 393         pos = ctx->pos;
 394 #else
 395         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir,
 396                          &partial_readdir_rc);
 397 #endif
 398         lfd->lfd_pos = pos;
 399         if (!lfd->fd_partial_readdir_rc)
 400                 lfd->fd_partial_readdir_rc = partial_readdir_rc;
 401
 402         if (pos == MDS_DIR_END_OFF) {
 403                 if (api32)
 404                         pos = LL_DIR_END_OFF_32BIT;
 405                 else
 406                         pos = LL_DIR_END_OFF;
 407         } else {
 408                 if (api32 && hash64)
 409                         pos = pos >> 32;
 410         }
 411 #ifdef HAVE_DIR_CONTEXT
 412         ctx->pos = pos;
 413 #else
 414         filp->f_pos = pos;
 415 #endif
 416         ll_finish_md_op_data(op_data);
 417
 418 out:
 419         if (!rc)
 420                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR,
 421                                    ktime_us_delta(ktime_get(), kstart));
 422
 423         RETURN(rc);
 424 }
 425
 426 /*
 427  * Create striped directory with specified stripe(@lump)
 428  *
 429  * \param[in] dparent   the parent of the directory.
 430  * \param[in] lump      the specified stripes.
 431  * \param[in] dirname   the name of the directory.
 432  * \param[in] mode      the specified mode of the directory.
 433  *
 434  * \retval              =0 if striped directory is being created successfully.
 435  *                      <0 if the creation is failed.
 436  */
 437 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 438                                size_t len, const char *dirname, umode_t mode,
 439                                bool createonly)
 440 {
 441         struct inode *parent = dparent->d_inode;
 442         struct ptlrpc_request *request = NULL;
 443         struct md_op_data *op_data;
 444         struct ll_sb_info *sbi = ll_i2sbi(parent);
 445         struct inode *inode = NULL;
 446         struct dentry dentry = {
 447                 .d_parent = dparent,
 448                 .d_name = {
 449                         .name = dirname,
 450                         .len = strlen(dirname),
 451                         .hash = ll_full_name_hash(dparent, dirname,
 452                                                   strlen(dirname)),
 453                 },
 454                 .d_sb = dparent->d_sb,
 455         };
 456         bool encrypt = false;
 457         int hash_flags;
 458         int err;
 459
 460         ENTRY;
 461         if (unlikely(!lmv_user_magic_supported(lump->lum_magic)))
 462                 RETURN(-EINVAL);
 463
 464         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 465                 CDEBUG(D_VFSTRACE,
 466                        "VFS Op:inode="DFID"(%p) name=%s stripe_offset=%d stripe_count=%u, hash_type=%x\n",
 467                        PFID(ll_inode2fid(parent)), parent, dirname,
 468                        (int)lump->lum_stripe_offset, lump->lum_stripe_count,
 469                        lump->lum_hash_type);
 470         } else {
 471                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 472
 473                 CDEBUG(D_VFSTRACE,
 474                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 475                        PFID(ll_inode2fid(parent)), parent, dirname,
 476                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 477         }
 478
 479         if (lump->lum_stripe_count > 1 &&
 480             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 481                 RETURN(-EINVAL);
 482
 483         if (IS_DEADDIR(parent) &&
 484             !CFS_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 485                 RETURN(-ENOENT);
 486
 487         /* MDS < 2.14 doesn't support 'crush' hash type, and cannot handle
 488          * unknown hash if client doesn't set a valid one. switch to fnv_1a_64.
 489          */
 490         if (CFS_FAIL_CHECK(OBD_FAIL_LMV_UNKNOWN_STRIPE)) {
 491                 lump->lum_hash_type = cfs_fail_val;
 492         } else if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_CRUSH)) {
 493                 enum lmv_hash_type type = lump->lum_hash_type &
 494                                           LMV_HASH_TYPE_MASK;
 495
 496                 if (type >= LMV_HASH_TYPE_CRUSH ||
 497                     type == LMV_HASH_TYPE_UNKNOWN)
 498                         lump->lum_hash_type = (lump->lum_hash_type ^ type) |
 499                                               LMV_HASH_TYPE_FNV_1A_64;
 500         }
 501
 502         hash_flags = lump->lum_hash_type & ~LMV_HASH_TYPE_MASK;
 503         if (hash_flags & ~LMV_HASH_FLAG_KNOWN)
 504                 RETURN(-EINVAL);
 505
 506         if (unlikely(!lmv_user_magic_supported(cpu_to_le32(lump->lum_magic))))
 507                 lustre_swab_lmv_user_md(lump);
 508
 509         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 510                 mode &= ~current_umask();
 511         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 512         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 513                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 514                                      lump);
 515         if (IS_ERR(op_data))
 516                 RETURN(PTR_ERR(op_data));
 517
 518         op_data->op_dir_depth = ll_i2info(parent)->lli_inherit_depth ?:
 519                                 ll_i2info(parent)->lli_dir_depth;
 520
 521         if (ll_sbi_has_encrypt(sbi) &&
 522             (IS_ENCRYPTED(parent) ||
 523              unlikely(ll_sb_has_test_dummy_encryption(parent->i_sb)))) {
 524                 err = llcrypt_prepare_readdir(parent);
 525                 if (err)
 526                         GOTO(out_op_data, err);
 527                 if (!llcrypt_has_encryption_key(parent))
 528                         GOTO(out_op_data, err = -ENOKEY);
 529                 encrypt = true;
 530         }
 531
 532         if (test_bit(LL_SBI_FILE_SECCTX, sbi->ll_flags)) {
 533                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 534                  * to determine the security context for the file. So our fake
 535                  * dentry should be real enough for this purpose.
 536                  */
 537                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 538                                               &op_data->op_file_secctx_name,
 539                                               &op_data->op_file_secctx_name_size,
 540                                               &op_data->op_file_secctx,
 541                                               &op_data->op_file_secctx_size,
 542                                               &op_data->op_file_secctx_slot);
 543                 if (err < 0)
 544                         GOTO(out_op_data, err);
 545         }
 546
 547         if (encrypt) {
 548                 err = llcrypt_inherit_context(parent, NULL, op_data, false);
 549                 if (err)
 550                         GOTO(out_op_data, err);
 551         }
 552
 553         op_data->op_cli_flags |= CLI_SET_MEA;
 554         if (createonly)
 555                 op_data->op_bias |= MDS_SETSTRIPE_CREATE;
 556
 557         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 558                         from_kuid(&init_user_ns, current_fsuid()),
 559                         from_kgid(&init_user_ns, current_fsgid()),
 560                         current_cap(), 0, &request);
 561         if (err)
 562                 GOTO(out_request, err);
 563
 564         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 565
 566         err = ll_prep_inode(&inode, &request->rq_pill, parent->i_sb, NULL);
 567         if (err)
 568                 GOTO(out_inode, err);
 569
 570         dentry.d_inode = inode;
 571
 572         if (test_bit(LL_SBI_FILE_SECCTX, sbi->ll_flags))
 573                 err = ll_inode_notifysecctx(inode, op_data->op_file_secctx,
 574                                             op_data->op_file_secctx_size);
 575         else
 576                 err = ll_inode_init_security(&dentry, inode, parent);
 577
 578         if (err)
 579                 GOTO(out_inode, err);
 580
 581         if (encrypt) {
 582                 err = ll_set_encflags(inode, op_data->op_file_encctx,
 583                                       op_data->op_file_encctx_size, false);
 584                 if (err)
 585                         GOTO(out_inode, err);
 586         }
 587
 588 out_inode:
 589         iput(inode);
 590 out_request:
 591         ptlrpc_req_finished(request);
 592 out_op_data:
 593         ll_finish_md_op_data(op_data);
 594
 595         return err;
 596 }
 597
 598 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 599                      int set_default)
 600 {
 601         struct ll_sb_info *sbi = ll_i2sbi(inode);
 602         struct md_op_data *op_data;
 603         struct ptlrpc_request *req = NULL;
 604         int rc = 0;
 605         int lum_size;
 606
 607         ENTRY;
 608         if (lump != NULL) {
 609                 switch (lump->lmm_magic) {
 610                 case LOV_USER_MAGIC_V1:
 611                         lum_size = sizeof(struct lov_user_md_v1);
 612                         break;
 613                 case LOV_USER_MAGIC_V3:
 614                         lum_size = sizeof(struct lov_user_md_v3);
 615                         break;
 616                 case LOV_USER_MAGIC_COMP_V1:
 617                         lum_size = ((struct lov_comp_md_v1 *)lump)->lcm_size;
 618                         break;
 619                 case LMV_USER_MAGIC: {
 620                         struct lmv_user_md *lmv = (struct lmv_user_md *)lump;
 621
 622                         /* MDS < 2.14 doesn't support 'crush' hash type, and
 623                          * cannot handle unknown hash if client doesn't set a
 624                          * valid one. switch to fnv_1a_64.
 625                          */
 626                         if (!(exp_connect_flags2(sbi->ll_md_exp) &
 627                               OBD_CONNECT2_CRUSH)) {
 628                                 enum lmv_hash_type type = lmv->lum_hash_type &
 629                                                           LMV_HASH_TYPE_MASK;
 630
 631                                 if (type >= LMV_HASH_TYPE_CRUSH ||
 632                                     type == LMV_HASH_TYPE_UNKNOWN)
 633                                         lmv->lum_hash_type =
 634                                                 (lmv->lum_hash_type ^ type) |
 635                                                 LMV_HASH_TYPE_FNV_1A_64;
 636                         }
 637                         if (lmv->lum_magic != cpu_to_le32(LMV_USER_MAGIC))
 638                                 lustre_swab_lmv_user_md(lmv);
 639                         lum_size = sizeof(*lmv);
 640                         break;
 641                 }
 642                 case LOV_USER_MAGIC_SPECIFIC: {
 643                         struct lov_user_md_v3 *v3 =
 644                                 (struct lov_user_md_v3 *)lump;
 645                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 646                                 RETURN(-EINVAL);
 647                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 648                                                     LOV_USER_MAGIC_SPECIFIC);
 649                         break;
 650                 }
 651                 default:
 652                         CDEBUG(D_IOCTL,
 653                                "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
 654                                lump->lmm_magic, LOV_USER_MAGIC_V1,
 655                                LOV_USER_MAGIC_V3);
 656                         RETURN(-EINVAL);
 657                 }
 658
 659                 /* This is coming from userspace, so should be in
 660                  * local endian.  But the MDS would like it in little
 661                  * endian, so we swab it before we send it.
 662                  */
 663                 if ((__swab32(lump->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
 664                     le32_to_cpu(LOV_MAGIC_MAGIC))
 665                         lustre_swab_lov_user_md(lump, 0);
 666         } else {
 667                 lum_size = sizeof(struct lov_user_md_v1);
 668         }
 669
 670         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 671                                      LUSTRE_OPC_ANY, NULL);
 672         if (IS_ERR(op_data))
 673                 RETURN(PTR_ERR(op_data));
 674
 675         /* swabbing is done in lov_setstripe() on server side */
 676         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 677         ll_finish_md_op_data(op_data);
 678         ptlrpc_req_finished(req);
 679         if (rc)
 680                 RETURN(rc);
 681
 682         RETURN(rc);
 683 }
 684
 685 /* get default LMV from client cache */
 686 static int ll_dir_get_default_lmv(struct inode *inode, struct lmv_user_md *lum)
 687 {
 688         struct ll_inode_info *lli = ll_i2info(inode);
 689         const struct lmv_stripe_md *lsm;
 690         bool fs_dmv_got = false;
 691         int rc = -ENODATA;
 692
 693         ENTRY;
 694 retry:
 695         if (lli->lli_def_lsm_obj) {
 696                 down_read(&lli->lli_lsm_sem);
 697                 lsm = &lli->lli_def_lsm_obj->lso_lsm;
 698                 if (lsm) {
 699                         lum->lum_magic = lsm->lsm_md_magic;
 700                         lum->lum_stripe_count = lsm->lsm_md_stripe_count;
 701                         lum->lum_stripe_offset = lsm->lsm_md_master_mdt_index;
 702                         lum->lum_hash_type = lsm->lsm_md_hash_type;
 703                         lum->lum_max_inherit = lsm->lsm_md_max_inherit;
 704                         lum->lum_max_inherit_rr = lsm->lsm_md_max_inherit_rr;
 705                         rc = 0;
 706                 }
 707                 up_read(&lli->lli_lsm_sem);
 708         }
 709
 710         if (rc == -ENODATA && !is_root_inode(inode) && !fs_dmv_got) {
 711                 lli = ll_i2info(inode->i_sb->s_root->d_inode);
 712                 fs_dmv_got = true;
 713                 goto retry;
 714         }
 715
 716         if (!rc && fs_dmv_got) {
 717                 lli = ll_i2info(inode);
 718                 if (lum->lum_max_inherit != LMV_INHERIT_UNLIMITED) {
 719                         if (lum->lum_max_inherit == LMV_INHERIT_NONE ||
 720                             lum->lum_max_inherit < LMV_INHERIT_END ||
 721                             lum->lum_max_inherit > LMV_INHERIT_MAX ||
 722                             lum->lum_max_inherit <= lli->lli_dir_depth)
 723                                 GOTO(out, rc = -ENODATA);
 724
 725                         lum->lum_max_inherit -= lli->lli_dir_depth;
 726                 }
 727
 728                 if (lum->lum_max_inherit_rr != LMV_INHERIT_RR_UNLIMITED) {
 729                         if (lum->lum_max_inherit_rr == LMV_INHERIT_NONE ||
 730                             lum->lum_max_inherit_rr < LMV_INHERIT_RR_END ||
 731                             lum->lum_max_inherit_rr > LMV_INHERIT_RR_MAX ||
 732                             lum->lum_max_inherit_rr <= lli->lli_dir_depth)
 733                                 lum->lum_max_inherit_rr = LMV_INHERIT_RR_NONE;
 734
 735                         if (lum->lum_max_inherit_rr > lli->lli_dir_depth)
 736                                 lum->lum_max_inherit_rr -= lli->lli_dir_depth;
 737                 }
 738         }
 739 out:
 740         RETURN(rc);
 741 }
 742
 743 int ll_dir_get_default_layout(struct inode *inode, void **plmm, int *plmm_size,
 744                               struct ptlrpc_request **request, u64 valid,
 745                               enum get_default_layout_type type)
 746 {
 747         struct ll_sb_info *sbi = ll_i2sbi(inode);
 748         struct mdt_body   *body;
 749         struct lov_mds_md *lmm = NULL;
 750         struct ptlrpc_request *req = NULL;
 751         int lmm_size = OBD_MAX_DEFAULT_EA_SIZE;
 752         struct md_op_data *op_data;
 753         struct lu_fid fid;
 754         int rc;
 755
 756         ENTRY;
 757
 758         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, lmm_size,
 759                                      LUSTRE_OPC_ANY, NULL);
 760         if (IS_ERR(op_data))
 761                 RETURN(PTR_ERR(op_data));
 762
 763         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 764
 765         if (type == GET_DEFAULT_LAYOUT_ROOT) {
 766                 lu_root_fid(&op_data->op_fid1);
 767                 fid = op_data->op_fid1;
 768         } else {
 769                 fid = *ll_inode2fid(inode);
 770         }
 771
 772         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 773         ll_finish_md_op_data(op_data);
 774         if (rc < 0) {
 775                 CDEBUG(D_INFO, "md_getattr failed on inode "DFID": rc %d\n",
 776                        PFID(&fid), rc);
 777                 GOTO(out, rc);
 778         }
 779
 780         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 781         LASSERT(body != NULL);
 782
 783         lmm_size = body->mbo_eadatasize;
 784
 785         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 786             lmm_size == 0) {
 787                 GOTO(out, rc = -ENODATA);
 788         }
 789
 790         lmm = req_capsule_server_sized_get(&req->rq_pill,
 791                                            &RMF_MDT_MD, lmm_size);
 792         LASSERT(lmm != NULL);
 793
 794         /* This is coming from the MDS, so is probably in
 795          * little endian.  We convert it to host endian before
 796          * passing it to userspace.
 797          */
 798         /* We don't swab objects for directories */
 799         switch (le32_to_cpu(lmm->lmm_magic)) {
 800         case LOV_MAGIC_V1:
 801         case LOV_MAGIC_V3:
 802         case LOV_MAGIC_COMP_V1:
 803         case LOV_USER_MAGIC_SPECIFIC:
 804                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 805                         lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
 806                 break;
 807         case LMV_MAGIC_V1:
 808                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 809                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 810                 break;
 811         case LMV_USER_MAGIC:
 812                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 813                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 814                 break;
 815         case LMV_MAGIC_FOREIGN: {
 816                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 817
 818                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 819                         __swab32s(&lfm->lfm_magic);
 820                         __swab32s(&lfm->lfm_length);
 821                         __swab32s(&lfm->lfm_type);
 822                         __swab32s(&lfm->lfm_flags);
 823                 }
 824                 break;
 825         }
 826         default:
 827                 rc = -EPROTO;
 828                 CERROR("%s: unknown magic: %lX: rc = %d\n", sbi->ll_fsname,
 829                        (unsigned long)lmm->lmm_magic, rc);
 830         }
 831 out:
 832         *plmm = lmm;
 833         *plmm_size = lmm_size;
 834         *request = req;
 835         return rc;
 836 }
 837
 838 /*
 839  * This function will be used to get default LOV/LMV/Default LMV
 840  * @valid will be used to indicate which stripe it will retrieve.
 841  * If the directory does not have its own default layout, then the
 842  * function will request the default layout from root FID.
 843  *      OBD_MD_MEA              LMV stripe EA
 844  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 845  *      otherwise               Default LOV EA.
 846  * Each time, it can only retrieve 1 stripe EA
 847  **/
 848 int ll_dir_getstripe_default(struct inode *inode, void **plmm, int *plmm_size,
 849                              struct ptlrpc_request **request,
 850                              struct ptlrpc_request **root_request,
 851                              u64 valid)
 852 {
 853         struct ptlrpc_request *req = NULL;
 854         struct ptlrpc_request *root_req = NULL;
 855         struct lov_mds_md *lmm = NULL;
 856         int lmm_size = 0;
 857         int rc = 0;
 858
 859         ENTRY;
 860         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 861                                        &req, valid, 0);
 862         if (rc == -ENODATA && !fid_is_root(ll_inode2fid(inode)) &&
 863             !(valid & OBD_MD_MEA) && root_request != NULL) {
 864                 int rc2 = ll_dir_get_default_layout(inode, (void **)&lmm,
 865                                                     &lmm_size, &root_req, valid,
 866                                                     GET_DEFAULT_LAYOUT_ROOT);
 867                 if (rc2 == 0)
 868                         rc = 0;
 869         }
 870
 871         *plmm = lmm;
 872         *plmm_size = lmm_size;
 873         *request = req;
 874         if (root_request != NULL)
 875                 *root_request = root_req;
 876
 877         RETURN(rc);
 878 }
 879
 880 /*
 881  * This function will be used to get default LOV/LMV/Default LMV
 882  * @valid will be used to indicate which stripe it will retrieve
 883  *      OBD_MD_MEA              LMV stripe EA
 884  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 885  *      otherwise               Default LOV EA.
 886  * Each time, it can only retrieve 1 stripe EA
 887  **/
 888 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 889                      struct ptlrpc_request **request, u64 valid)
 890 {
 891         struct ptlrpc_request *req = NULL;
 892         struct lov_mds_md *lmm = NULL;
 893         int lmm_size = 0;
 894         int rc = 0;
 895
 896         ENTRY;
 897         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 898                                        &req, valid, 0);
 899
 900         *plmm = lmm;
 901         *plmm_size = lmm_size;
 902         *request = req;
 903
 904         RETURN(rc);
 905 }
 906
 907 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 908 {
 909         struct md_op_data *op_data;
 910         int rc;
 911         int mdt_index;
 912
 913         ENTRY;
 914         OBD_ALLOC_PTR(op_data);
 915         if (op_data == NULL)
 916                 RETURN(-ENOMEM);
 917
 918         op_data->op_flags |= MF_GET_MDT_IDX;
 919         op_data->op_fid1 = *fid;
 920         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 921         mdt_index = op_data->op_mds;
 922         OBD_FREE_PTR(op_data);
 923         if (rc < 0)
 924                 RETURN(rc);
 925
 926         RETURN(mdt_index);
 927 }
 928
 929 /*
 930  *  Get MDT index for the inode.
 931  */
 932 int ll_get_mdt_idx(struct inode *inode)
 933 {
 934         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 935 }
 936
 937 /*
 938  * Generic handler to do any pre-copy work.
 939  *
 940  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 941  * first information for it that real work has started.
 942  *
 943  * Moreover, for a ARCHIVE request, it will sample the file data version and
 944  * store it in \a copy.
 945  *
 946  * \return 0 on success.
 947  */
 948 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 949 {
 950         struct ll_sb_info *sbi = ll_s2sbi(sb);
 951         struct hsm_progress_kernel hpk;
 952         int rc = 0;
 953         int rc2;
 954
 955         ENTRY;
 956         /* Forge a hsm_progress based on data from copy. */
 957         hpk.hpk_fid = copy->hc_hai.hai_fid;
 958         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 959         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 960         hpk.hpk_extent.length = 0;
 961         hpk.hpk_flags = 0;
 962         hpk.hpk_errval = 0;
 963         hpk.hpk_data_version = 0;
 964
 965
 966         /* For archive request, we need to read the current file version. */
 967         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 968                 struct inode    *inode;
 969                 __u64            data_version = 0;
 970
 971                 /* Get inode for this fid */
 972                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 973                 if (IS_ERR(inode)) {
 974                         hpk.hpk_flags |= HP_FLAG_RETRY;
 975                         /* hpk_errval is >= 0 */
 976                         hpk.hpk_errval = -PTR_ERR(inode);
 977                         GOTO(progress, rc = PTR_ERR(inode));
 978                 }
 979
 980                 /* Read current file data version */
 981                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 982                 iput(inode);
 983                 if (rc != 0) {
 984                         CDEBUG(D_HSM, "Could not read file data version of "
 985                                       DFID" (rc = %d). Archive request ("
 986                                       "%#llx) could not be done.\n",
 987                                       PFID(&copy->hc_hai.hai_fid), rc,
 988                                       copy->hc_hai.hai_cookie);
 989                         hpk.hpk_flags |= HP_FLAG_RETRY;
 990                         /* hpk_errval must be >= 0 */
 991                         hpk.hpk_errval = -rc;
 992                         GOTO(progress, rc);
 993                 }
 994
 995                 /* Store in the hsm_copy for later copytool use.
 996                  * Always modified even if no lsm.
 997                  */
 998                 copy->hc_data_version = data_version;
 999         }
1000
1001 progress:
1002         /* On error, the request should be considered as completed */
1003         if (hpk.hpk_errval > 0)
1004                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
1005
1006         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1007                             &hpk, NULL);
1008
1009         /* Return first error */
1010         RETURN(rc != 0 ? rc : rc2);
1011 }
1012
1013 /*
1014  * Generic handler to do any post-copy work.
1015  *
1016  * It will send the last hsm_progress update to coordinator to inform it
1017  * that copy is finished and whether it was successful or not.
1018  *
1019  * Moreover,
1020  * - for ARCHIVE request, it will sample the file data version and compare it
1021  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
1022  *   will be considered as failed.
1023  * - for RESTORE request, it will sample the file data version and send it to
1024  *   coordinator which is useful if the file was imported as 'released'.
1025  *
1026  * \return 0 on success.
1027  */
1028 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
1029 {
1030         struct ll_sb_info *sbi = ll_s2sbi(sb);
1031         struct hsm_progress_kernel hpk;
1032         int rc = 0;
1033         int rc2;
1034
1035         ENTRY;
1036         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
1037         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
1038          * initialized if copy_end was called with copy == NULL.
1039          */
1040
1041         /* Forge a hsm_progress based on data from copy. */
1042         hpk.hpk_fid = copy->hc_hai.hai_fid;
1043         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
1044         hpk.hpk_extent = copy->hc_hai.hai_extent;
1045         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
1046         hpk.hpk_errval = copy->hc_errval;
1047         hpk.hpk_data_version = 0;
1048
1049         /* For archive request, we need to check the file data was not changed.
1050          *
1051          * For restore request, we need to send the file data version, this is
1052          * useful when the file was created using hsm_import.
1053          */
1054         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
1055              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
1056             (copy->hc_errval == 0)) {
1057                 struct inode    *inode;
1058                 __u64            data_version = 0;
1059
1060                 /* Get lsm for this fid */
1061                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
1062                 if (IS_ERR(inode)) {
1063                         hpk.hpk_flags |= HP_FLAG_RETRY;
1064                         /* hpk_errval must be >= 0 */
1065                         hpk.hpk_errval = -PTR_ERR(inode);
1066                         GOTO(progress, rc = PTR_ERR(inode));
1067                 }
1068
1069                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
1070                 iput(inode);
1071                 if (rc) {
1072                         CDEBUG(D_HSM,
1073                                "Could not read file data version. Request could not be confirmed.\n");
1074                         if (hpk.hpk_errval == 0)
1075                                 hpk.hpk_errval = -rc;
1076                         GOTO(progress, rc);
1077                 }
1078
1079                 /* Store in the hsm_copy for later copytool use.
1080                  * Always modified even if no lsm.
1081                  */
1082                 hpk.hpk_data_version = data_version;
1083
1084                 /* File could have been stripped during archiving, so we need
1085                  * to check anyway.
1086                  */
1087                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
1088                     (copy->hc_data_version != data_version)) {
1089                         CDEBUG(D_HSM, "File data version mismatched. "
1090                               "File content was changed during archiving. "
1091                                DFID", start:%#llx current:%#llx\n",
1092                                PFID(&copy->hc_hai.hai_fid),
1093                                copy->hc_data_version, data_version);
1094                         /* File was changed, send error to cdt. Do not ask for
1095                          * retry because if a file is modified frequently,
1096                          * the cdt will loop on retried archive requests.
1097                          * The policy engine will ask for a new archive later
1098                          * when the file will not be modified for some tunable
1099                          * time
1100                          */
1101                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
1102                         rc = -EBUSY;
1103                         /* hpk_errval must be >= 0 */
1104                         hpk.hpk_errval = -rc;
1105                         GOTO(progress, rc);
1106                 }
1107
1108         }
1109
1110 progress:
1111         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1112                             &hpk, NULL);
1113
1114         /* Return first error */
1115         RETURN(rc != 0 ? rc : rc2);
1116 }
1117
1118
1119 static int copy_and_ct_start(int cmd, struct obd_export *exp,
1120                              const struct lustre_kernelcomm __user *data)
1121 {
1122         struct lustre_kernelcomm *lk;
1123         struct lustre_kernelcomm *tmp;
1124         size_t size = sizeof(*lk);
1125         size_t new_size;
1126         int i;
1127         int rc;
1128
1129         /* copy data from userspace to get numbers of archive_id */
1130         OBD_ALLOC(lk, size);
1131         if (lk == NULL)
1132                 return -ENOMEM;
1133
1134         if (copy_from_user(lk, data, size))
1135                 GOTO(out_lk, rc = -EFAULT);
1136
1137         if (lk->lk_flags & LK_FLG_STOP)
1138                 goto do_ioctl;
1139
1140         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1141                 __u32 archive_mask = lk->lk_data_count;
1142                 int count;
1143
1144                 /* old hsm agent to old MDS */
1145                 if (!exp_connect_archive_id_array(exp))
1146                         goto do_ioctl;
1147
1148                 /* old hsm agent to new MDS */
1149                 lk->lk_flags |= LK_FLG_DATANR;
1150
1151                 if (archive_mask == 0)
1152                         goto do_ioctl;
1153
1154                 count = hweight32(archive_mask);
1155                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1156                 OBD_ALLOC(tmp, new_size);
1157                 if (tmp == NULL)
1158                         GOTO(out_lk, rc = -ENOMEM);
1159
1160                 memcpy(tmp, lk, size);
1161                 tmp->lk_data_count = count;
1162                 OBD_FREE(lk, size);
1163                 lk = tmp;
1164                 size = new_size;
1165
1166                 count = 0;
1167                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1168                         if (BIT(i) & archive_mask) {
1169                                 lk->lk_data[count] = i + 1;
1170                                 count++;
1171                         }
1172                 }
1173                 goto do_ioctl;
1174         }
1175
1176         /* new hsm agent to new mds */
1177         if (lk->lk_data_count > 0) {
1178                 new_size = offsetof(struct lustre_kernelcomm,
1179                                     lk_data[lk->lk_data_count]);
1180                 OBD_ALLOC(tmp, new_size);
1181                 if (tmp == NULL)
1182                         GOTO(out_lk, rc = -ENOMEM);
1183
1184                 OBD_FREE(lk, size);
1185                 lk = tmp;
1186                 size = new_size;
1187
1188                 if (copy_from_user(lk, data, size))
1189                         GOTO(out_lk, rc = -EFAULT);
1190         }
1191
1192         /* new hsm agent to old MDS */
1193         if (!exp_connect_archive_id_array(exp)) {
1194                 __u32 archives = 0;
1195
1196                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1197                         GOTO(out_lk, rc = -EINVAL);
1198
1199                 for (i = 0; i < lk->lk_data_count; i++) {
1200                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1201                                 rc = -EINVAL;
1202                                 CERROR("%s: archive id %d requested but only [0 - %zu] supported: rc = %d\n",
1203                                        exp->exp_obd->obd_name, lk->lk_data[i],
1204                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1205                                 GOTO(out_lk, rc);
1206                         }
1207
1208                         if (lk->lk_data[i] == 0) {
1209                                 archives = 0;
1210                                 break;
1211                         }
1212
1213                         archives |= (1 << (lk->lk_data[i] - 1));
1214                 }
1215                 lk->lk_flags &= ~LK_FLG_DATANR;
1216                 lk->lk_data_count = archives;
1217         }
1218 do_ioctl:
1219         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1220 out_lk:
1221         OBD_FREE(lk, size);
1222         return rc;
1223 }
1224
1225 static int check_owner(int type, int id)
1226 {
1227         switch (type) {
1228         case USRQUOTA:
1229                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1230                         return -EPERM;
1231                 break;
1232         case GRPQUOTA:
1233                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1234                         return -EPERM;
1235                 break;
1236         case PRJQUOTA:
1237                 break;
1238         }
1239         return 0;
1240 }
1241
1242 struct kmem_cache *quota_iter_slab;
1243 static DEFINE_MUTEX(quotactl_iter_lock);
1244
1245 struct ll_quotactl_iter_list {
1246         __u64            lqil_mark;      /* iter identifier */
1247         __u32            lqil_flags;     /* what has been done */
1248         pid_t            lqil_pid;       /* debug calling task */
1249         time64_t         lqil_iter_time; /* the time to iter */
1250         struct list_head lqil_sbi_list;  /* list on ll_sb_info */
1251         struct list_head lqil_quotactl_iter_list; /* list of quota iters */
1252 };
1253
1254 void ll_quota_iter_check_and_cleanup(struct ll_sb_info *sbi, bool check)
1255 {
1256         struct if_quotactl_iter *iter_rec = NULL;
1257         struct ll_quotactl_iter_list *tmp, *ll_iter = NULL;
1258
1259         if (!check)
1260                 mutex_lock(&quotactl_iter_lock);
1261
1262         list_for_each_entry_safe(ll_iter, tmp, &sbi->ll_all_quota_list,
1263                                  lqil_sbi_list) {
1264                 if (check &&
1265                     ll_iter->lqil_iter_time > (ktime_get_seconds() - 86400))
1266                         continue;
1267
1268                 while ((iter_rec = list_first_entry_or_null(
1269                                         &ll_iter->lqil_quotactl_iter_list,
1270                                         struct if_quotactl_iter,
1271                                         qci_link)) != NULL) {
1272                         list_del_init(&iter_rec->qci_link);
1273                         OBD_SLAB_FREE_PTR(iter_rec, quota_iter_slab);
1274                 }
1275
1276                 list_del_init(&ll_iter->lqil_sbi_list);
1277                 OBD_FREE_PTR(ll_iter);
1278         }
1279
1280         if (!check)
1281                 mutex_unlock(&quotactl_iter_lock);
1282 }
1283
1284 /* iterate the quota usage from all QSDs */
1285 static int quotactl_iter_acct(struct list_head *quota_list, void *buffer,
1286                               __u64 size, __u64 *count, __u32 qtype, bool is_md)
1287 {
1288         struct if_quotactl_iter *tmp, *iter = NULL;
1289         struct lquota_acct_rec *acct;
1290         __u64 qid, cur = 0;
1291         int rc = 0;
1292
1293         ENTRY;
1294
1295         while (cur < size) {
1296                 if ((size - cur) <
1297                     (sizeof(qid) + sizeof(*acct))) {
1298                         rc = -EPROTO;
1299                         break;
1300                 }
1301
1302                 qid = *((__u64 *)(buffer + cur));
1303                 cur += sizeof(qid);
1304                 acct = (struct lquota_acct_rec *)(buffer + cur);
1305                 cur += sizeof(*acct);
1306
1307                 iter = NULL;
1308                 list_for_each_entry(tmp, quota_list, qci_link) {
1309                         if (tmp->qci_qc.qc_id == (__u32)qid) {
1310                                 iter = tmp;
1311                                 break;
1312                         }
1313                 }
1314
1315                 if (iter == NULL) {
1316                         CDEBUG(D_QUOTA, "can't find the iter record for %llu\n",
1317                                qid);
1318
1319                         if (qid != 0)
1320                                 continue;
1321
1322                         OBD_SLAB_ALLOC_PTR(iter, quota_iter_slab);
1323                         if (iter == NULL) {
1324                                 rc = -ENOMEM;
1325                                 break;
1326                         }
1327
1328                         INIT_LIST_HEAD(&iter->qci_link);
1329                         iter->qci_qc.qc_id = 0;
1330                         iter->qci_qc.qc_type = qtype;
1331                         (*count)++;
1332
1333                         list_add(&iter->qci_link, quota_list);
1334                 }
1335
1336                 if (is_md) {
1337                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_INODES;
1338                         iter->qci_qc.qc_dqblk.dqb_curinodes += acct->ispace;
1339                         iter->qci_qc.qc_dqblk.dqb_curspace += acct->bspace;
1340                 } else {
1341                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_SPACE;
1342                         iter->qci_qc.qc_dqblk.dqb_curspace += acct->bspace;
1343                 }
1344         }
1345
1346         RETURN(rc);
1347 }
1348
1349 /* iterate all quota settings from QMT */
1350 static int quotactl_iter_glb(struct list_head *quota_list, void *buffer,
1351                              __u64 size, __u64 *count, __u32 qtype, bool is_md)
1352 {
1353         struct if_quotactl_iter *tmp, *iter = NULL;
1354         struct lquota_glb_rec *glb;
1355         __u64 qid, cur = 0;
1356         bool inserted = false;
1357         int rc = 0;
1358
1359         ENTRY;
1360
1361         while (cur < size) {
1362                 if ((size - cur) <
1363                     (sizeof(qid) + sizeof(*glb))) {
1364                         rc = -EPROTO;
1365                         break;
1366                 }
1367
1368                 qid = *((__u64 *)(buffer + cur));
1369                 cur += sizeof(qid);
1370                 glb = (struct lquota_glb_rec *)(buffer + cur);
1371                 cur += sizeof(*glb);
1372
1373                 iter = NULL;
1374                 list_for_each_entry(tmp, quota_list, qci_link) {
1375                         if (tmp->qci_qc.qc_id == (__u32)qid) {
1376                                 iter = tmp;
1377                                 break;
1378                         }
1379                 }
1380
1381                 if (iter == NULL) {
1382                         OBD_SLAB_ALLOC_PTR(iter, quota_iter_slab);
1383                         if (iter == NULL) {
1384                                 rc = -ENOMEM;
1385                                 break;
1386                         }
1387
1388                         INIT_LIST_HEAD(&iter->qci_link);
1389
1390                         inserted = false;
1391                         list_for_each_entry(tmp, quota_list, qci_link) {
1392                                 if (tmp->qci_qc.qc_id < qid)
1393                                         continue;
1394
1395                                 inserted = true;
1396                                 list_add_tail(&iter->qci_link,
1397                                               &tmp->qci_link);
1398                                 break;
1399                         }
1400
1401                         if (!inserted)
1402                                 list_add_tail(&iter->qci_link, quota_list);
1403
1404                         iter->qci_qc.qc_type = qtype;
1405                         iter->qci_qc.qc_id = (__u32)qid;
1406                         (*count)++;
1407                 }
1408
1409                 if (is_md) {
1410                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_ILIMITS;
1411                         iter->qci_qc.qc_dqblk.dqb_ihardlimit =
1412                                                              glb->qbr_hardlimit;
1413                         iter->qci_qc.qc_dqblk.dqb_isoftlimit =
1414                                                              glb->qbr_softlimit;
1415                         iter->qci_qc.qc_dqblk.dqb_itime = glb->qbr_time;
1416                 } else {
1417                         iter->qci_qc.qc_dqblk.dqb_valid |= QIF_BLIMITS;
1418                         iter->qci_qc.qc_dqblk.dqb_bhardlimit =
1419                                                              glb->qbr_hardlimit;
1420                         iter->qci_qc.qc_dqblk.dqb_bsoftlimit =
1421                                                              glb->qbr_softlimit;
1422                         iter->qci_qc.qc_dqblk.dqb_btime = glb->qbr_time;
1423                 }
1424         }
1425
1426         RETURN(rc);
1427 }
1428
1429 /* iterate the quota setting from QMT and all QSDs to get the quota information
1430  * for all users or groups
1431  **/
1432 static int quotactl_iter(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1433 {
1434         struct list_head iter_quota_glb_list;
1435         struct list_head iter_obd_quota_md_list;
1436         struct list_head iter_obd_quota_dt_list;
1437         struct ll_quotactl_iter_list *ll_iter;
1438         struct lquota_iter *iter;
1439         struct obd_quotactl *oqctl;
1440         __u64 count;
1441         int rc = 0;
1442
1443         ENTRY;
1444
1445         OBD_ALLOC_PTR(ll_iter);
1446         if (ll_iter == NULL)
1447                 RETURN(-ENOMEM);
1448
1449         INIT_LIST_HEAD(&ll_iter->lqil_sbi_list);
1450         INIT_LIST_HEAD(&ll_iter->lqil_quotactl_iter_list);
1451
1452         mutex_lock(&quotactl_iter_lock);
1453
1454         if (!list_empty(&sbi->ll_all_quota_list))
1455                 ll_quota_iter_check_and_cleanup(sbi, true);
1456
1457         INIT_LIST_HEAD(&iter_quota_glb_list);
1458         INIT_LIST_HEAD(&iter_obd_quota_md_list);
1459         INIT_LIST_HEAD(&iter_obd_quota_dt_list);
1460
1461         OBD_ALLOC_PTR(oqctl);
1462         if (oqctl == NULL)
1463                 GOTO(out, rc = -ENOMEM);
1464
1465         QCTL_COPY(oqctl, qctl);
1466         oqctl->qc_iter_list = (__u64)&iter_quota_glb_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_md_list;
1474         rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1475         if (rc)
1476                 GOTO(cleanup, rc);
1477
1478         QCTL_COPY(oqctl, qctl);
1479         oqctl->qc_cmd = LUSTRE_Q_ITEROQUOTA;
1480         oqctl->qc_iter_list = (__u64)&iter_obd_quota_dt_list;
1481         rc = obd_quotactl(sbi->ll_dt_exp, oqctl);
1482         if (rc)
1483                 GOTO(cleanup, rc);
1484
1485         count = 0;
1486         while ((iter = list_first_entry_or_null(&iter_quota_glb_list,
1487                                                 struct lquota_iter, li_link))) {
1488                 void *buffer;
1489
1490                 buffer = iter->li_buffer;
1491                 rc = quotactl_iter_glb(&ll_iter->lqil_quotactl_iter_list,
1492                                        buffer, iter->li_md_size, &count,
1493                                        oqctl->qc_type, true);
1494                 if (rc)
1495                         GOTO(cleanup, rc);
1496
1497                 buffer = iter->li_buffer + LQUOTA_ITER_BUFLEN / 2;
1498                 rc = quotactl_iter_glb(&ll_iter->lqil_quotactl_iter_list,
1499                                        buffer, iter->li_dt_size, &count,
1500                                        oqctl->qc_type,  false);
1501
1502                 if (rc)
1503                         GOTO(cleanup, rc);
1504
1505                 list_del_init(&iter->li_link);
1506                 OBD_FREE_LARGE(iter,
1507                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1508         }
1509
1510         while ((iter = list_first_entry_or_null(&iter_obd_quota_md_list,
1511                                                 struct lquota_iter, li_link))) {
1512                 rc = quotactl_iter_acct(&ll_iter->lqil_quotactl_iter_list,
1513                                         iter->li_buffer, iter->li_md_size,
1514                                         &count, oqctl->qc_type, true);
1515                 if (rc)
1516                         GOTO(cleanup, rc);
1517
1518                 list_del_init(&iter->li_link);
1519                 OBD_FREE_LARGE(iter,
1520                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1521         }
1522
1523         while ((iter = list_first_entry_or_null(&iter_obd_quota_dt_list,
1524                                                 struct lquota_iter, li_link))) {
1525                 rc = quotactl_iter_acct(&ll_iter->lqil_quotactl_iter_list,
1526                                         iter->li_buffer, iter->li_dt_size,
1527                                         &count, oqctl->qc_type, false);
1528                 if (rc)
1529                         GOTO(cleanup, rc);
1530
1531                 list_del_init(&iter->li_link);
1532                 OBD_FREE_LARGE(iter,
1533                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1534         }
1535
1536         ll_iter->lqil_mark = ((__u64)current->pid << 32) |
1537                              ((__u32)qctl->qc_type << 8) |
1538                              (ktime_get_seconds() & 0xFFFFFF);
1539         ll_iter->lqil_flags = qctl->qc_type;
1540         ll_iter->lqil_pid = current->pid;
1541         ll_iter->lqil_iter_time = ktime_get_seconds();
1542
1543         list_add(&ll_iter->lqil_sbi_list, &sbi->ll_all_quota_list);
1544
1545         qctl->qc_allquota_count = count;
1546         qctl->qc_allquota_mark = ll_iter->lqil_mark;
1547         GOTO(out, rc);
1548
1549 cleanup:
1550         ll_quota_iter_check_and_cleanup(sbi, true);
1551
1552         while ((iter = list_first_entry_or_null(&iter_quota_glb_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_md_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         while ((iter = list_first_entry_or_null(&iter_obd_quota_dt_list,
1567                                                 struct lquota_iter, li_link))) {
1568                 list_del_init(&iter->li_link);
1569                 OBD_FREE_LARGE(iter,
1570                                sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
1571         }
1572
1573         OBD_FREE_PTR(ll_iter);
1574
1575 out:
1576         OBD_FREE_PTR(oqctl);
1577
1578         mutex_unlock(&quotactl_iter_lock);
1579         RETURN(rc);
1580 }
1581
1582 static int quotactl_getallquota(struct ll_sb_info *sbi,
1583                                 struct if_quotactl *qctl)
1584 {
1585         struct ll_quotactl_iter_list *ll_iter = NULL;
1586         struct if_quotactl_iter *iter = NULL;
1587         void __user *buffer = (void __user *)qctl->qc_allquota_buffer;
1588         __u64 cur = 0, count = qctl->qc_allquota_buflen;
1589         int rc = 0;
1590
1591         ENTRY;
1592
1593         mutex_lock(&quotactl_iter_lock);
1594
1595         while ((ll_iter = list_first_entry_or_null(&sbi->ll_all_quota_list,
1596                                                 struct ll_quotactl_iter_list,
1597                                                 lqil_sbi_list)) != NULL) {
1598                 if (qctl->qc_allquota_mark == ll_iter->lqil_mark)
1599                         break;
1600         }
1601
1602         if (!ll_iter) {
1603                 mutex_unlock(&quotactl_iter_lock);
1604                 RETURN(-EBUSY);
1605         }
1606
1607         while ((iter = list_first_entry_or_null(
1608                                         &ll_iter->lqil_quotactl_iter_list,
1609                                         struct if_quotactl_iter, qci_link))) {
1610                 if (count - cur < sizeof(struct if_quotactl)) {
1611                         rc = -ERANGE;
1612                         break;
1613                 }
1614
1615                 if (copy_to_user(buffer + cur, &iter->qci_qc,
1616                                  sizeof(struct if_quotactl))) {
1617                         rc = -EFAULT;
1618                         break;
1619                 }
1620
1621                 cur += sizeof(struct if_quotactl);
1622
1623                 list_del_init(&iter->qci_link);
1624                 OBD_SLAB_FREE_PTR(iter, quota_iter_slab);
1625         }
1626
1627         /* cleanup in case of error */
1628         while ((iter = list_first_entry_or_null(
1629                                         &ll_iter->lqil_quotactl_iter_list,
1630                                         struct if_quotactl_iter, qci_link))) {
1631                 list_del_init(&iter->qci_link);
1632                 OBD_SLAB_FREE_PTR(iter, quota_iter_slab);
1633         }
1634
1635         mutex_unlock(&quotactl_iter_lock);
1636
1637         RETURN(rc);
1638 }
1639
1640 int quotactl_ioctl(struct super_block *sb, struct if_quotactl *qctl)
1641 {
1642         struct ll_sb_info *sbi = ll_s2sbi(sb);
1643         int cmd = qctl->qc_cmd;
1644         int type = qctl->qc_type;
1645         int id = qctl->qc_id;
1646         int valid = qctl->qc_valid;
1647         int rc = 0;
1648
1649         ENTRY;
1650
1651         switch (cmd) {
1652         case Q_SETQUOTA:
1653         case Q_SETINFO:
1654         case LUSTRE_Q_SETDEFAULT:
1655         case LUSTRE_Q_SETQUOTAPOOL:
1656         case LUSTRE_Q_SETINFOPOOL:
1657         case LUSTRE_Q_SETDEFAULT_POOL:
1658         case LUSTRE_Q_DELETEQID:
1659         case LUSTRE_Q_RESETQID:
1660                 if (!capable(CAP_SYS_ADMIN))
1661                         RETURN(-EPERM);
1662
1663                 if (sb->s_flags & SB_RDONLY)
1664                         RETURN(-EROFS);
1665                 break;
1666         case Q_GETQUOTA:
1667         case LUSTRE_Q_GETDEFAULT:
1668         case LUSTRE_Q_GETQUOTAPOOL:
1669         case LUSTRE_Q_GETDEFAULT_POOL:
1670         case LUSTRE_Q_ITERQUOTA:
1671         case LUSTRE_Q_GETALLQUOTA:
1672                 if (check_owner(type, id) &&
1673                     (!capable(CAP_SYS_ADMIN)))
1674                         RETURN(-EPERM);
1675                 break;
1676         case Q_GETINFO:
1677         case LUSTRE_Q_GETINFOPOOL:
1678                 break;
1679         default:
1680                 CERROR("%s: unsupported quotactl op: %#x: rc = %d\n",
1681                        sbi->ll_fsname, cmd, -EOPNOTSUPP);
1682                 RETURN(-EOPNOTSUPP);
1683         }
1684
1685         if (cmd == LUSTRE_Q_ITERQUOTA) {
1686                 rc = quotactl_iter(sbi, qctl);
1687         } else if (cmd == LUSTRE_Q_GETALLQUOTA) {
1688                 rc = quotactl_getallquota(sbi, qctl);
1689         } else if (valid != QC_GENERAL) {
1690                 if (cmd == Q_GETINFO)
1691                         qctl->qc_cmd = Q_GETOINFO;
1692                 else if (cmd == Q_GETQUOTA ||
1693                          cmd == LUSTRE_Q_GETQUOTAPOOL)
1694                         qctl->qc_cmd = Q_GETOQUOTA;
1695                 else
1696                         RETURN(-EINVAL);
1697
1698                 switch (valid) {
1699                 case QC_MDTIDX:
1700                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1701                                            sizeof(*qctl), qctl, NULL);
1702                         break;
1703                 case QC_OSTIDX:
1704                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1705                                            sizeof(*qctl), qctl, NULL);
1706                         break;
1707                 case QC_UUID:
1708                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1709                                            sizeof(*qctl), qctl, NULL);
1710                         if (rc == -EAGAIN)
1711                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1712                                                    sbi->ll_dt_exp,
1713                                                    sizeof(*qctl), qctl, NULL);
1714                         break;
1715                 default:
1716                         rc = -EINVAL;
1717                         break;
1718                 }
1719
1720                 qctl->qc_cmd = cmd;
1721                 if (rc)
1722                         RETURN(rc);
1723         } else {
1724                 struct obd_quotactl *oqctl;
1725                 int oqctl_len = sizeof(*oqctl);
1726
1727                 if (LUSTRE_Q_CMD_IS_POOL(cmd))
1728                         oqctl_len += LOV_MAXPOOLNAME + 1;
1729
1730                 OBD_ALLOC(oqctl, oqctl_len);
1731                 if (oqctl == NULL)
1732                         RETURN(-ENOMEM);
1733
1734                 QCTL_COPY(oqctl, qctl);
1735                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1736                 if (rc) {
1737                         OBD_FREE(oqctl, oqctl_len);
1738                         RETURN(rc);
1739                 }
1740                 /* If QIF_SPACE is not set, client should collect the
1741                  * space usage from OSSs by itself
1742                  */
1743                 if ((cmd == Q_GETQUOTA || cmd == LUSTRE_Q_GETQUOTAPOOL) &&
1744                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1745                     !oqctl->qc_dqblk.dqb_curspace) {
1746                         struct obd_quotactl *oqctl_tmp;
1747                         int qctl_len = sizeof(*oqctl_tmp) + LOV_MAXPOOLNAME + 1;
1748
1749                         OBD_ALLOC(oqctl_tmp, qctl_len);
1750                         if (oqctl_tmp == NULL)
1751                                 GOTO(out, rc = -ENOMEM);
1752
1753                         if (cmd == LUSTRE_Q_GETQUOTAPOOL) {
1754                                 oqctl_tmp->qc_cmd = LUSTRE_Q_GETQUOTAPOOL;
1755                                 memcpy(oqctl_tmp->qc_poolname,
1756                                        qctl->qc_poolname,
1757                                        LOV_MAXPOOLNAME + 1);
1758                         } else {
1759                                 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1760                         }
1761                         oqctl_tmp->qc_id = oqctl->qc_id;
1762                         oqctl_tmp->qc_type = oqctl->qc_type;
1763
1764                         /* collect space usage from OSTs */
1765                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1766                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1767                         if (!rc || rc == -EREMOTEIO) {
1768                                 oqctl->qc_dqblk.dqb_curspace =
1769                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1770                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1771                         }
1772
1773                         /* collect space & inode usage from MDTs */
1774                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1775                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1776                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1777                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1778                         if (!rc || rc == -EREMOTEIO) {
1779                                 oqctl->qc_dqblk.dqb_curspace +=
1780                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1781                                 oqctl->qc_dqblk.dqb_curinodes =
1782                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1783                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1784                         } else {
1785                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1786                         }
1787
1788                         OBD_FREE(oqctl_tmp, qctl_len);
1789                 }
1790 out:
1791                 QCTL_COPY(qctl, oqctl);
1792                 OBD_FREE(oqctl, oqctl_len);
1793         }
1794
1795         RETURN(rc);
1796 }
1797
1798 static int ll_rmfid(struct file *file, void __user *arg)
1799 {
1800         const struct fid_array __user *ufa = arg;
1801         struct inode *inode = file_inode(file);
1802         struct ll_sb_info *sbi = ll_i2sbi(inode);
1803         struct fid_array *lfa = NULL, *lfa_new = NULL;
1804         int i, rc, *rcs = NULL;
1805         unsigned int nr;
1806         bool lfa_flag = false; /* lfa already free'ed */
1807         size_t size;
1808
1809         ENTRY;
1810         if (!capable(CAP_DAC_READ_SEARCH) &&
1811             !test_bit(LL_SBI_USER_FID2PATH, ll_i2sbi(inode)->ll_flags))
1812                 RETURN(-EPERM);
1813         /* Only need to get the buflen */
1814         if (get_user(nr, &ufa->fa_nr))
1815                 RETURN(-EFAULT);
1816         /* DoS protection */
1817         if (nr > OBD_MAX_FIDS_IN_ARRAY)
1818                 RETURN(-E2BIG);
1819
1820         size = offsetof(struct fid_array, fa_fids[nr]);
1821         OBD_ALLOC(lfa, size);
1822         if (!lfa)
1823                 RETURN(-ENOMEM);
1824         OBD_ALLOC_PTR_ARRAY(rcs, nr);
1825         if (!rcs)
1826                 GOTO(free_lfa, rc = -ENOMEM);
1827
1828         if (copy_from_user(lfa, arg, size))
1829                 GOTO(free_rcs, rc = -EFAULT);
1830
1831         /* In case of subdirectory mount, we need to make sure all the files
1832          * for which we want to remove FID are visible in the namespace.
1833          */
1834         if (!fid_is_root(&sbi->ll_root_fid)) {
1835                 int path_len = PATH_MAX, linkno;
1836                 struct getinfo_fid2path *gf;
1837                 int idx, last_idx = nr - 1;
1838
1839                 lfa_new = NULL;
1840
1841                 OBD_ALLOC(lfa_new, size);
1842                 if (!lfa_new)
1843                         GOTO(free_rcs, rc = -ENOMEM);
1844                 lfa_new->fa_nr = 0;
1845
1846                 gf = kmalloc(sizeof(*gf) + path_len + 1, GFP_NOFS);
1847                 if (!gf)
1848                         GOTO(free_lfa_new, rc = -ENOMEM);
1849
1850                 for (idx = 0; idx < nr; idx++) {
1851                         linkno = 0;
1852                         while (1) {
1853                                 memset(gf, 0, sizeof(*gf) + path_len + 1);
1854                                 gf->gf_fid = lfa->fa_fids[idx];
1855                                 gf->gf_pathlen = path_len;
1856                                 gf->gf_linkno = linkno;
1857                                 rc = __ll_fid2path(inode, gf,
1858                                                    sizeof(*gf) + gf->gf_pathlen,
1859                                                    gf->gf_pathlen);
1860                                 if (rc == -ENAMETOOLONG) {
1861                                         struct getinfo_fid2path *tmpgf;
1862
1863                                         path_len += PATH_MAX;
1864                                         tmpgf = krealloc(gf,
1865                                                      sizeof(*gf) + path_len + 1,
1866                                                      GFP_NOFS);
1867                                         if (!tmpgf) {
1868                                                 kfree(gf);
1869                                                 GOTO(free_lfa_new, rc = -ENOMEM);
1870                                         }
1871                                         gf = tmpgf;
1872                                         continue;
1873                                 }
1874                                 if (rc)
1875                                         break;
1876                                 if (gf->gf_linkno == linkno)
1877                                         break;
1878                                 linkno = gf->gf_linkno;
1879                         }
1880
1881                         if (!rc) {
1882                                 /* All the links for this fid are visible in the
1883                                  * mounted subdir. So add it to the list of fids
1884                                  * to remove.
1885                                  */
1886                                 lfa_new->fa_fids[lfa_new->fa_nr++] =
1887                                         lfa->fa_fids[idx];
1888                         } else {
1889                                 /* At least one link for this fid is not visible
1890                                  * in the mounted subdir. So add it at the end
1891                                  * of the list that will be hidden to lower
1892                                  * layers, and set -ENOENT as ret code.
1893                                  */
1894                                 lfa_new->fa_fids[last_idx] = lfa->fa_fids[idx];
1895                                 rcs[last_idx--] = rc;
1896                         }
1897                 }
1898                 kfree(gf);
1899                 OBD_FREE(lfa, size);
1900                 lfa_flag = true;
1901                 lfa = lfa_new;
1902         }
1903         if (lfa->fa_nr == 0)
1904                 GOTO(free_rcs, rc = rcs[nr - 1]);
1905
1906         /* Call mdc_iocontrol */
1907         rc = md_rmfid(ll_i2mdexp(file_inode(file)), lfa, rcs, NULL);
1908         lfa->fa_nr = nr;
1909         if (!rc) {
1910                 for (i = 0; i < nr; i++)
1911                         if (rcs[i])
1912                                 lfa->fa_fids[i].f_ver = rcs[i];
1913                 if (copy_to_user(arg, lfa, size))
1914                         rc = -EFAULT;
1915         }
1916
1917 free_lfa_new:
1918         OBD_FREE(lfa_new, size);
1919 free_rcs:
1920         OBD_FREE_PTR_ARRAY(rcs, nr);
1921 free_lfa:
1922         if (!lfa_flag)
1923                 OBD_FREE(lfa, size);
1924
1925         RETURN(rc);
1926 }
1927
1928 /* This function tries to get a single name component, to send to the server.
1929  * No actual path traversal involved, so we limit to NAME_MAX
1930  */
1931 static char *ll_getname(const char __user *filename)
1932 {
1933         int ret = 0, len;
1934         char *tmp;
1935
1936         OBD_ALLOC(tmp, NAME_MAX + 1);
1937
1938         if (!tmp)
1939                 return ERR_PTR(-ENOMEM);
1940
1941         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1942         if (len < 0)
1943                 ret = -ENOENT;
1944         else if (len > NAME_MAX)
1945                 ret = -ENAMETOOLONG;
1946
1947         if (ret) {
1948                 OBD_FREE(tmp, NAME_MAX + 1);
1949                 tmp =  ERR_PTR(ret);
1950         }
1951         return tmp;
1952 }
1953
1954 static const char *const ladvise_names[] = LU_LADVISE_NAMES;
1955
1956 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1957
1958 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1959 {
1960         struct dentry *dentry = file_dentry(file);
1961         struct inode *inode = file_inode(file);
1962         struct ll_sb_info *sbi = ll_i2sbi(inode);
1963         struct obd_ioctl_data *data = NULL;
1964         void __user *uarg = (void __user *)arg;
1965         int rc = 0;
1966
1967         ENTRY;
1968         CDEBUG(D_VFSTRACE|D_IOCTL, "VFS Op:inode="DFID"(%pK) cmd=%x arg=%lx\n",
1969                PFID(ll_inode2fid(inode)), inode, cmd, arg);
1970
1971         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1972         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1973                 return -ENOTTY;
1974
1975         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1976         switch (cmd) {
1977         case IOC_MDC_LOOKUP: {
1978                 int namelen, len = 0;
1979                 char *filename;
1980
1981                 rc = obd_ioctl_getdata(&data, &len, uarg);
1982                 if (rc != 0)
1983                         RETURN(rc);
1984
1985                 filename = data->ioc_inlbuf1;
1986                 namelen = strlen(filename);
1987                 if (namelen < 1) {
1988                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1989                         GOTO(out_free, rc = -EINVAL);
1990                 }
1991
1992                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1993                 if (rc < 0) {
1994                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1995                                sbi->ll_fsname, namelen, filename, rc);
1996                         GOTO(out_free, rc);
1997                 }
1998 out_free:
1999                 OBD_FREE_LARGE(data, len);
2000                 return rc;
2001         }
2002         case LL_IOC_LMV_SETSTRIPE: {
2003                 struct lmv_user_md  *lum;
2004                 char *filename;
2005                 int namelen = 0;
2006                 int lumlen = 0;
2007                 umode_t mode;
2008                 bool createonly = false;
2009                 int len;
2010                 int rc;
2011
2012                 rc = obd_ioctl_getdata(&data, &len, uarg);
2013                 if (rc)
2014                         RETURN(rc);
2015
2016                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2017                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2018                         GOTO(lmv_out_free, rc = -EINVAL);
2019
2020                 filename = data->ioc_inlbuf1;
2021                 namelen = data->ioc_inllen1;
2022
2023                 if (namelen < 1) {
2024                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2025                         GOTO(lmv_out_free, rc = -EINVAL);
2026                 }
2027                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2028                 lumlen = data->ioc_inllen2;
2029
2030                 if (!lmv_user_magic_supported(lum->lum_magic)) {
2031                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
2032                                lum->lum_magic, -EINVAL);
2033                         GOTO(lmv_out_free, rc = -EINVAL);
2034                 }
2035
2036                 if ((lum->lum_magic == LMV_USER_MAGIC ||
2037                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
2038                     lumlen < sizeof(*lum)) {
2039                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
2040                                filename, lumlen, lum->lum_magic, -EINVAL);
2041                         GOTO(lmv_out_free, rc = -EINVAL);
2042                 }
2043
2044                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
2045                     lumlen < sizeof(struct lmv_foreign_md)) {
2046                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
2047                                filename, lum->lum_magic, lumlen, -EFAULT);
2048                         GOTO(lmv_out_free, rc = -EINVAL);
2049                 }
2050
2051                 mode = data->ioc_type;
2052                 createonly = data->ioc_obdo1.o_flags & OBD_FL_OBDMDEXISTS;
2053                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode,
2054                                          createonly);
2055 lmv_out_free:
2056                 OBD_FREE_LARGE(data, len);
2057                 RETURN(rc);
2058
2059         }
2060         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
2061                 struct lmv_user_md lum;
2062                 struct lmv_user_md __user *ulump = uarg;
2063                 int rc;
2064
2065                 if (copy_from_user(&lum, ulump, sizeof(lum)))
2066                         RETURN(-EFAULT);
2067
2068                 if (lum.lum_magic != LMV_USER_MAGIC)
2069                         RETURN(-EINVAL);
2070
2071                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
2072
2073                 RETURN(rc);
2074         }
2075         case LL_IOC_LOV_SETSTRIPE_NEW:
2076         case LL_IOC_LOV_SETSTRIPE: {
2077                 struct lov_user_md_v3 *lumv3 = NULL;
2078                 struct lov_user_md_v1 lumv1;
2079                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
2080                 struct lov_user_md_v1 __user *lumv1p = uarg;
2081                 struct lov_user_md_v3 __user *lumv3p = uarg;
2082                 int lum_size = 0;
2083                 int set_default = 0;
2084
2085                 BUILD_BUG_ON(sizeof(struct lov_user_md_v3) <=
2086                              sizeof(struct lov_comp_md_v1));
2087                 BUILD_BUG_ON(sizeof(*lumv3) != sizeof(*lumv3p));
2088                 /* first try with v1 which is smaller than v3 */
2089                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
2090                         RETURN(-EFAULT);
2091
2092                 if (is_root_inode(inode))
2093                         set_default = 1;
2094
2095                 switch (lumv1.lmm_magic) {
2096                 case LOV_USER_MAGIC_V3:
2097                 case LOV_USER_MAGIC_SPECIFIC:
2098                         lum_size = ll_lov_user_md_size(&lumv1);
2099                         if (lum_size < 0)
2100                                 RETURN(lum_size);
2101                         OBD_ALLOC(lumv3, lum_size);
2102                         if (!lumv3)
2103                                 RETURN(-ENOMEM);
2104                         if (copy_from_user(lumv3, lumv3p, lum_size))
2105                                 GOTO(out, rc = -EFAULT);
2106                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
2107                         break;
2108                 case LOV_USER_MAGIC_V1:
2109                         break;
2110                 default:
2111                         GOTO(out, rc = -EOPNOTSUPP);
2112                 }
2113
2114                 /* in v1 and v3 cases lumv1 points to data */
2115                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
2116 out:
2117                 if (lumv3)
2118                         OBD_FREE(lumv3, lum_size);
2119                 RETURN(rc);
2120         }
2121         case LL_IOC_LMV_GETSTRIPE: {
2122                 struct lmv_user_md __user *ulmv = uarg;
2123                 struct lmv_user_md lum;
2124                 struct ptlrpc_request *request = NULL;
2125                 union lmv_mds_md *lmm = NULL;
2126                 int lmmsize;
2127                 u64 valid = 0;
2128                 struct lmv_user_md *tmp = NULL;
2129                 int mdt_index;
2130                 int lum_size;
2131                 int stripe_count;
2132                 int max_stripe_count;
2133                 int i;
2134                 int rc;
2135
2136                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
2137                         RETURN(-EFAULT);
2138
2139                 /* get default LMV */
2140                 if (lum.lum_magic == LMV_USER_MAGIC &&
2141                     lum.lum_type != LMV_TYPE_RAW) {
2142                         rc = ll_dir_get_default_lmv(inode, &lum);
2143                         if (rc)
2144                                 RETURN(rc);
2145
2146                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
2147                                 RETURN(-EFAULT);
2148
2149                         RETURN(0);
2150                 }
2151
2152                 max_stripe_count = lum.lum_stripe_count;
2153                 /* lum_magic will indicate which stripe the ioctl will like
2154                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
2155                  * is for default LMV stripe
2156                  */
2157                 if (lum.lum_magic == LMV_MAGIC_V1)
2158                         valid |= OBD_MD_MEA;
2159                 else if (lum.lum_magic == LMV_USER_MAGIC)
2160                         valid |= OBD_MD_DEFAULT_MEA;
2161                 else
2162                         RETURN(-EINVAL);
2163
2164                 rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmmsize,
2165                                               &request, NULL, valid);
2166                 if (rc != 0)
2167                         GOTO(finish_req, rc);
2168
2169                 /* get default LMV in raw mode */
2170                 if (lum.lum_magic == LMV_USER_MAGIC) {
2171                         if (copy_to_user(ulmv, lmm, lmmsize))
2172                                 GOTO(finish_req, rc = -EFAULT);
2173                         GOTO(finish_req, rc);
2174                 }
2175
2176                 /* if foreign LMV case, fake stripes number */
2177                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
2178                         struct lmv_foreign_md *lfm;
2179
2180                         lfm = (struct lmv_foreign_md *)lmm;
2181                         if (lfm->lfm_length < XATTR_SIZE_MAX -
2182                             offsetof(typeof(*lfm), lfm_value)) {
2183                                 __u32 size = lfm->lfm_length +
2184                                              offsetof(typeof(*lfm), lfm_value);
2185
2186                                 stripe_count = lmv_foreign_to_md_stripes(size);
2187                         } else {
2188                                 CERROR("%s: invalid %d foreign size returned: rc = %d\n",
2189                                        sbi->ll_fsname, lfm->lfm_length,
2190                                        -EINVAL);
2191                                 return -EINVAL;
2192                         }
2193                 } else {
2194                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
2195                 }
2196                 if (max_stripe_count < stripe_count) {
2197                         lum.lum_stripe_count = stripe_count;
2198                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
2199                                 GOTO(finish_req, rc = -EFAULT);
2200                         GOTO(finish_req, rc = -E2BIG);
2201                 }
2202
2203                 /* enough room on user side and foreign case */
2204                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
2205                         struct lmv_foreign_md *lfm;
2206                         __u32 size;
2207
2208                         lfm = (struct lmv_foreign_md *)lmm;
2209                         size = lfm->lfm_length +
2210                                offsetof(struct lmv_foreign_md, lfm_value);
2211                         if (copy_to_user(ulmv, lfm, size))
2212                                 GOTO(finish_req, rc = -EFAULT);
2213                         GOTO(finish_req, rc);
2214                 }
2215
2216                 lum_size = lmv_user_md_size(stripe_count,
2217                                             LMV_USER_MAGIC_SPECIFIC);
2218                 OBD_ALLOC(tmp, lum_size);
2219                 if (tmp == NULL)
2220                         GOTO(finish_req, rc = -ENOMEM);
2221
2222                 mdt_index = ll_get_mdt_idx(inode);
2223                 if (mdt_index < 0)
2224                         GOTO(out_tmp, rc = -ENOMEM);
2225
2226                 tmp->lum_magic = LMV_MAGIC_V1;
2227                 tmp->lum_stripe_count = 0;
2228                 tmp->lum_stripe_offset = mdt_index;
2229                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
2230                 for (i = 0; i < stripe_count; i++) {
2231                         struct lu_fid   fid;
2232
2233                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
2234                         if (fid_is_sane(&fid)) {
2235                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
2236                                 if (mdt_index < 0)
2237                                         GOTO(out_tmp, rc = mdt_index);
2238
2239                                 tmp->lum_objects[i].lum_mds = mdt_index;
2240                                 tmp->lum_objects[i].lum_fid = fid;
2241                         }
2242
2243                         tmp->lum_stripe_count++;
2244                 }
2245
2246                 if (copy_to_user(ulmv, tmp, lum_size))
2247                         GOTO(out_tmp, rc = -EFAULT);
2248 out_tmp:
2249                 OBD_FREE(tmp, lum_size);
2250 finish_req:
2251                 ptlrpc_req_finished(request);
2252                 return rc;
2253         }
2254         case LL_IOC_REMOVE_ENTRY: {
2255                 char *filename = NULL;
2256                 int namelen = 0;
2257                 int rc;
2258
2259                 /* Here is a little hack to avoid sending REINT_RMENTRY to
2260                  * unsupported server, which might crash the server(LU-2730),
2261                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
2262                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
2263                  * server will support REINT_RMENTRY XXX
2264                  */
2265                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
2266                         RETURN(-EOPNOTSUPP);
2267
2268                 filename = ll_getname(uarg);
2269                 if (IS_ERR(filename))
2270                         RETURN(PTR_ERR(filename));
2271
2272                 namelen = strlen(filename);
2273                 if (namelen < 1)
2274                         GOTO(out_rmdir, rc = -EINVAL);
2275
2276                 rc = ll_rmdir_entry(inode, filename, namelen);
2277 out_rmdir:
2278                 if (filename)
2279                         ll_putname(filename);
2280                 RETURN(rc);
2281         }
2282         case LL_IOC_RMFID:
2283                 RETURN(ll_rmfid(file, uarg));
2284         case LL_IOC_LOV_SWAP_LAYOUTS:
2285                 RETURN(-EPERM);
2286         case LL_IOC_LOV_GETSTRIPE:
2287         case LL_IOC_LOV_GETSTRIPE_NEW:
2288         case LL_IOC_MDC_GETINFO_V1:
2289         case LL_IOC_MDC_GETINFO_V2:
2290         case IOC_MDC_GETFILEINFO_V1:
2291         case IOC_MDC_GETFILEINFO_V2:
2292         case IOC_MDC_GETFILESTRIPE: {
2293                 struct ptlrpc_request *request = NULL;
2294                 struct ptlrpc_request *root_request = NULL;
2295                 struct lov_user_md __user *lump;
2296                 struct lov_mds_md *lmm = NULL;
2297                 struct mdt_body *body;
2298                 char *filename = NULL;
2299                 lstat_t __user *statp = NULL;
2300                 lstatx_t __user *stxp = NULL;
2301                 __u64 __user *flagsp = NULL;
2302                 __u32 __user *lmmsizep = NULL;
2303                 struct lu_fid __user *fidp = NULL;
2304                 int lmmsize;
2305                 bool api32;
2306
2307                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2308                     cmd == IOC_MDC_GETFILEINFO_V2 ||
2309                     cmd == IOC_MDC_GETFILESTRIPE) {
2310                         filename = ll_getname(uarg);
2311                         if (IS_ERR(filename))
2312                                 RETURN(PTR_ERR(filename));
2313
2314                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
2315                                                       &lmmsize, &request);
2316                 } else {
2317                         rc = ll_dir_getstripe_default(inode, (void **)&lmm,
2318                                                       &lmmsize, &request,
2319                                                       &root_request, 0);
2320                 }
2321
2322                 if (request) {
2323                         body = req_capsule_server_get(&request->rq_pill,
2324                                                       &RMF_MDT_BODY);
2325                         LASSERT(body != NULL);
2326                 } else {
2327                         GOTO(out_req, rc);
2328                 }
2329
2330                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO_V1 ||
2331                                        cmd == LL_IOC_MDC_GETINFO_V1 ||
2332                                        cmd == IOC_MDC_GETFILEINFO_V2 ||
2333                                        cmd == LL_IOC_MDC_GETINFO_V2)) {
2334                         lmmsize = 0;
2335                         rc = 0;
2336                 }
2337
2338                 if (rc < 0)
2339                         GOTO(out_req, rc);
2340
2341                 if (cmd == IOC_MDC_GETFILESTRIPE ||
2342                     cmd == LL_IOC_LOV_GETSTRIPE ||
2343                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
2344                         lump = uarg;
2345                 } else if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2346                            cmd == LL_IOC_MDC_GETINFO_V1){
2347                         struct lov_user_mds_data_v1 __user *lmdp;
2348
2349                         lmdp = uarg;
2350                         statp = &lmdp->lmd_st;
2351                         lump = &lmdp->lmd_lmm;
2352                 } else {
2353                         struct lov_user_mds_data __user *lmdp;
2354
2355                         lmdp = uarg;
2356                         fidp = &lmdp->lmd_fid;
2357                         stxp = &lmdp->lmd_stx;
2358                         flagsp = &lmdp->lmd_flags;
2359                         lmmsizep = &lmdp->lmd_lmmsize;
2360                         lump = &lmdp->lmd_lmm;
2361                 }
2362
2363                 if (lmmsize == 0) {
2364                         /* If the file has no striping then zero out *lump so
2365                          * that the caller isn't confused by garbage.
2366                          */
2367                         if (clear_user(lump, sizeof(*lump)))
2368                                 GOTO(out_req, rc = -EFAULT);
2369                 } else if (copy_to_user(lump, lmm, lmmsize)) {
2370                         if (copy_to_user(lump, lmm, sizeof(*lump)))
2371                                 GOTO(out_req, rc = -EFAULT);
2372                         rc = -EOVERFLOW;
2373                 }
2374                 api32 = test_bit(LL_SBI_32BIT_API, sbi->ll_flags);
2375
2376                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
2377                     cmd == LL_IOC_MDC_GETINFO_V1) {
2378                         lstat_t st = { 0 };
2379
2380                         st.st_dev       = inode->i_sb->s_dev;
2381                         st.st_mode      = body->mbo_mode;
2382                         st.st_nlink     = body->mbo_nlink;
2383                         st.st_uid       = body->mbo_uid;
2384                         st.st_gid       = body->mbo_gid;
2385                         st.st_rdev      = body->mbo_rdev;
2386                         if (llcrypt_require_key(inode) == -ENOKEY)
2387                                 st.st_size = round_up(st.st_size,
2388                                                    LUSTRE_ENCRYPTION_UNIT_SIZE);
2389                         else
2390                                 st.st_size = body->mbo_size;
2391                         st.st_blksize   = PAGE_SIZE;
2392                         st.st_blocks    = body->mbo_blocks;
2393                         st.st_atime     = body->mbo_atime;
2394                         st.st_mtime     = body->mbo_mtime;
2395                         st.st_ctime     = body->mbo_ctime;
2396                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
2397                                                            api32);
2398
2399                         if (copy_to_user(statp, &st, sizeof(st)))
2400                                 GOTO(out_req, rc = -EFAULT);
2401                 } else if (cmd == IOC_MDC_GETFILEINFO_V2 ||
2402                            cmd == LL_IOC_MDC_GETINFO_V2) {
2403                         lstatx_t stx = { 0 };
2404                         __u64 valid = body->mbo_valid;
2405
2406                         stx.stx_blksize = PAGE_SIZE;
2407                         stx.stx_nlink = body->mbo_nlink;
2408                         stx.stx_uid = body->mbo_uid;
2409                         stx.stx_gid = body->mbo_gid;
2410                         stx.stx_mode = body->mbo_mode;
2411                         stx.stx_ino = cl_fid_build_ino(&body->mbo_fid1,
2412                                                        api32);
2413                         if (llcrypt_require_key(inode) == -ENOKEY)
2414                                 stx.stx_size = round_up(stx.stx_size,
2415                                                    LUSTRE_ENCRYPTION_UNIT_SIZE);
2416                         else
2417                                 stx.stx_size = body->mbo_size;
2418                         stx.stx_blocks = body->mbo_blocks;
2419                         stx.stx_atime.tv_sec = body->mbo_atime;
2420                         stx.stx_ctime.tv_sec = body->mbo_ctime;
2421                         stx.stx_mtime.tv_sec = body->mbo_mtime;
2422                         stx.stx_btime.tv_sec = body->mbo_btime;
2423                         stx.stx_rdev_major = MAJOR(body->mbo_rdev);
2424                         stx.stx_rdev_minor = MINOR(body->mbo_rdev);
2425                         stx.stx_dev_major = MAJOR(inode->i_sb->s_dev);
2426                         stx.stx_dev_minor = MINOR(inode->i_sb->s_dev);
2427                         stx.stx_mask |= STATX_BASIC_STATS | STATX_BTIME;
2428
2429                         stx.stx_attributes_mask = STATX_ATTR_IMMUTABLE |
2430                                                   STATX_ATTR_APPEND;
2431 #ifdef HAVE_LUSTRE_CRYPTO
2432                         stx.stx_attributes_mask |= STATX_ATTR_ENCRYPTED;
2433 #endif
2434                         if (body->mbo_valid & OBD_MD_FLFLAGS) {
2435                                 stx.stx_attributes |= body->mbo_flags;
2436                                 /* if Lustre specific LUSTRE_ENCRYPT_FL flag is
2437                                  * set, also set ext4 equivalent to please statx
2438                                  */
2439                                 if (body->mbo_flags & LUSTRE_ENCRYPT_FL)
2440                                         stx.stx_attributes |=
2441                                                 STATX_ATTR_ENCRYPTED;
2442                         }
2443
2444                         /* For a striped directory, the size and blocks returned
2445                          * from MDT is not correct.
2446                          * The size and blocks are aggregated by client across
2447                          * all stripes.
2448                          * Thus for a striped directory, do not return the valid
2449                          * FLSIZE and FLBLOCKS flags to the caller.
2450                          * However, this whould be better decided by the MDS
2451                          * instead of the client.
2452                          */
2453                         if (cmd == LL_IOC_MDC_GETINFO_V2 &&
2454                             ll_dir_striped(inode))
2455                                 valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
2456
2457                         if (flagsp && copy_to_user(flagsp, &valid,
2458                                                    sizeof(*flagsp)))
2459                                 GOTO(out_req, rc = -EFAULT);
2460
2461                         if (fidp && copy_to_user(fidp, &body->mbo_fid1,
2462                                                  sizeof(*fidp)))
2463                                 GOTO(out_req, rc = -EFAULT);
2464
2465                         if (!(valid & OBD_MD_FLSIZE))
2466                                 stx.stx_mask &= ~STATX_SIZE;
2467                         if (!(valid & OBD_MD_FLBLOCKS))
2468                                 stx.stx_mask &= ~STATX_BLOCKS;
2469
2470                         if (stxp && copy_to_user(stxp, &stx, sizeof(stx)))
2471                                 GOTO(out_req, rc = -EFAULT);
2472
2473                         if (lmmsizep && copy_to_user(lmmsizep, &lmmsize,
2474                                                      sizeof(*lmmsizep)))
2475                                 GOTO(out_req, rc = -EFAULT);
2476                 }
2477
2478                 EXIT;
2479 out_req:
2480                 ptlrpc_req_finished(request);
2481                 ptlrpc_req_finished(root_request);
2482                 if (filename)
2483                         ll_putname(filename);
2484                 return rc;
2485         }
2486         case OBD_IOC_QUOTACTL: {
2487                 struct if_quotactl *qctl;
2488                 int qctl_len = sizeof(*qctl) + LOV_MAXPOOLNAME + 1;
2489
2490                 OBD_ALLOC(qctl, qctl_len);
2491                 if (!qctl)
2492                         RETURN(-ENOMEM);
2493
2494                 if (copy_from_user(qctl, uarg, sizeof(*qctl)))
2495                         GOTO(out_quotactl, rc = -EFAULT);
2496
2497                 if (LUSTRE_Q_CMD_IS_POOL(qctl->qc_cmd)) {
2498                         char __user *from = uarg +
2499                                         offsetof(typeof(*qctl), qc_poolname);
2500                         if (copy_from_user(qctl->qc_poolname, from,
2501                                            LOV_MAXPOOLNAME + 1))
2502                                 GOTO(out_quotactl, rc = -EFAULT);
2503                 }
2504
2505                 rc = quotactl_ioctl(inode->i_sb, qctl);
2506                 if ((rc == 0 || rc == -ENODATA) &&
2507                     copy_to_user(uarg, qctl, sizeof(*qctl)))
2508                         rc = -EFAULT;
2509 out_quotactl:
2510                 OBD_FREE(qctl, qctl_len);
2511                 RETURN(rc);
2512         }
2513         case LL_IOC_GETOBDCOUNT: {
2514                 u32 count, vallen;
2515                 struct obd_export *exp;
2516
2517                 if (copy_from_user(&count, uarg, sizeof(count)))
2518                         RETURN(-EFAULT);
2519
2520                 /* get ost count when count is zero, get mdt count otherwise */
2521                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
2522                 vallen = sizeof(count);
2523                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
2524                                   KEY_TGT_COUNT, &vallen, &count);
2525                 if (rc) {
2526                         CERROR("%s: get target count failed: rc = %d\n",
2527                                sbi->ll_fsname, rc);
2528                         RETURN(rc);
2529                 }
2530
2531                 if (copy_to_user(uarg, &count, sizeof(count)))
2532                         RETURN(-EFAULT);
2533
2534                 RETURN(0);
2535         }
2536         case LL_IOC_GET_CONNECT_FLAGS:
2537                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL, uarg));
2538         case LL_IOC_FID2MDTIDX: {
2539                 struct obd_export *exp = ll_i2mdexp(inode);
2540                 struct lu_fid fid;
2541                 __u32 index;
2542
2543                 if (copy_from_user(&fid, uarg, sizeof(fid)))
2544                         RETURN(-EFAULT);
2545
2546                 /* Call mdc_iocontrol */
2547                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
2548                                    (__u32 __user *)&index);
2549                 if (rc != 0)
2550                         RETURN(rc);
2551
2552                 RETURN(index);
2553         }
2554         case LL_IOC_HSM_REQUEST: {
2555                 struct hsm_user_request *hur;
2556                 ssize_t totalsize;
2557
2558                 OBD_ALLOC_PTR(hur);
2559                 if (hur == NULL)
2560                         RETURN(-ENOMEM);
2561
2562                 /* We don't know the true size yet; copy the fixed-size part */
2563                 if (copy_from_user(hur, uarg, sizeof(*hur))) {
2564                         OBD_FREE_PTR(hur);
2565                         RETURN(-EFAULT);
2566                 }
2567
2568                 /* Compute the whole struct size */
2569                 totalsize = hur_len(hur);
2570                 OBD_FREE_PTR(hur);
2571                 if (totalsize < 0)
2572                         RETURN(-E2BIG);
2573
2574                 /* Final size will be more than double totalsize */
2575                 if (totalsize >= MDS_MAXREQSIZE / 3)
2576                         RETURN(-E2BIG);
2577
2578                 OBD_ALLOC_LARGE(hur, totalsize);
2579                 if (hur == NULL)
2580                         RETURN(-ENOMEM);
2581
2582                 /* Copy the whole struct */
2583                 if (copy_from_user(hur, uarg, totalsize))
2584                         GOTO(out_hur, rc = -EFAULT);
2585
2586                 if (hur->hur_request.hr_action == HUA_RELEASE) {
2587                         const struct lu_fid *fid;
2588                         struct inode *f;
2589                         int i;
2590
2591                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
2592                                 fid = &hur->hur_user_item[i].hui_fid;
2593                                 f = search_inode_for_lustre(inode->i_sb, fid);
2594                                 if (IS_ERR(f)) {
2595                                         rc = PTR_ERR(f);
2596                                         break;
2597                                 }
2598
2599                                 rc = ll_hsm_release(f);
2600                                 iput(f);
2601                                 if (rc != 0)
2602                                         break;
2603                         }
2604                 } else {
2605                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
2606                                            hur, NULL);
2607                 }
2608 out_hur:
2609                 OBD_FREE_LARGE(hur, totalsize);
2610
2611                 RETURN(rc);
2612         }
2613         case LL_IOC_HSM_PROGRESS: {
2614                 struct hsm_progress_kernel hpk;
2615                 struct hsm_progress hp;
2616
2617                 if (copy_from_user(&hp, uarg, sizeof(hp)))
2618                         RETURN(-EFAULT);
2619
2620                 hpk.hpk_fid = hp.hp_fid;
2621                 hpk.hpk_cookie = hp.hp_cookie;
2622                 hpk.hpk_extent = hp.hp_extent;
2623                 hpk.hpk_flags = hp.hp_flags;
2624                 hpk.hpk_errval = hp.hp_errval;
2625                 hpk.hpk_data_version = 0;
2626
2627                 /* File may not exist in Lustre; all progress
2628                  * reported to Lustre root
2629                  */
2630                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
2631                                    NULL);
2632                 RETURN(rc);
2633         }
2634         case LL_IOC_HSM_CT_START:
2635                 if (!capable(CAP_SYS_ADMIN))
2636                         RETURN(-EPERM);
2637
2638                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp, uarg);
2639                 RETURN(rc);
2640
2641         case LL_IOC_HSM_COPY_START: {
2642                 struct hsm_copy *copy;
2643                 int rc;
2644
2645                 OBD_ALLOC_PTR(copy);
2646                 if (copy == NULL)
2647                         RETURN(-ENOMEM);
2648                 if (copy_from_user(copy, uarg, sizeof(*copy))) {
2649                         OBD_FREE_PTR(copy);
2650                         RETURN(-EFAULT);
2651                 }
2652
2653                 rc = ll_ioc_copy_start(inode->i_sb, copy);
2654                 if (copy_to_user(uarg, copy, sizeof(*copy)))
2655                         rc = -EFAULT;
2656
2657                 OBD_FREE_PTR(copy);
2658                 RETURN(rc);
2659         }
2660         case LL_IOC_HSM_COPY_END: {
2661                 struct hsm_copy *copy;
2662                 int rc;
2663
2664                 OBD_ALLOC_PTR(copy);
2665                 if (copy == NULL)
2666                         RETURN(-ENOMEM);
2667                 if (copy_from_user(copy, uarg, sizeof(*copy))) {
2668                         OBD_FREE_PTR(copy);
2669                         RETURN(-EFAULT);
2670                 }
2671
2672                 rc = ll_ioc_copy_end(inode->i_sb, copy);
2673                 if (copy_to_user(uarg, copy, sizeof(*copy)))
2674                         rc = -EFAULT;
2675
2676                 OBD_FREE_PTR(copy);
2677                 RETURN(rc);
2678         }
2679         case LL_IOC_MIGRATE: {
2680                 struct lmv_user_md *lum;
2681                 int len;
2682                 char *filename;
2683                 int namelen = 0;
2684                 __u32 flags;
2685                 int rc;
2686
2687                 rc = obd_ioctl_getdata(&data, &len, uarg);
2688                 if (rc)
2689                         RETURN(rc);
2690
2691                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2692                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2693                         GOTO(migrate_free, rc = -EINVAL);
2694
2695                 filename = data->ioc_inlbuf1;
2696                 namelen = data->ioc_inllen1;
2697                 flags = data->ioc_type;
2698
2699                 if (namelen < 1 || namelen != strlen(filename) + 1) {
2700                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2701                         GOTO(migrate_free, rc = -EINVAL);
2702                 }
2703
2704                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2705                 if (lum->lum_magic != LMV_USER_MAGIC &&
2706                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
2707                         rc = -EINVAL;
2708                         CERROR("%s: wrong lum magic %x: rc = %d\n",
2709                                filename, lum->lum_magic, rc);
2710                         GOTO(migrate_free, rc);
2711                 }
2712
2713                 rc = ll_migrate(inode, file, lum, filename, flags);
2714 migrate_free:
2715                 OBD_FREE_LARGE(data, len);
2716
2717                 RETURN(rc);
2718         }
2719         case LL_IOC_LADVISE2: {
2720                 struct llapi_lu_ladvise2 *ladvise;
2721
2722                 OBD_ALLOC_PTR(ladvise);
2723                 if (ladvise == NULL)
2724                         RETURN(-ENOMEM);
2725
2726                 if (copy_from_user(ladvise, uarg, sizeof(*ladvise)))
2727                         GOTO(out_ladvise, rc = -EFAULT);
2728
2729                 switch (ladvise->lla_advice) {
2730                 case LU_LADVISE_AHEAD:
2731                         if (ladvise->lla_start >= ladvise->lla_end) {
2732                                 CDEBUG(D_VFSTRACE,
2733                                        "%s: Invalid range (%llu %llu) for %s\n",
2734                                        sbi->ll_fsname, ladvise->lla_start,
2735                                        ladvise->lla_end,
2736                                        ladvise_names[ladvise->lla_advice]);
2737                                 GOTO(out_ladvise, rc = -EINVAL);
2738                         }
2739
2740                         /*
2741                          * Currently we only support name indexing format
2742                          * ahead operations.
2743                          */
2744                         if (ladvise->lla_ahead_mode != LU_AH_NAME_INDEX) {
2745                                 CDEBUG(D_VFSTRACE,
2746                                        "%s: Invalid access mode (%d) for %s\n",
2747                                        sbi->ll_fsname, ladvise->lla_ahead_mode,
2748                                        ladvise_names[ladvise->lla_advice]);
2749                                 GOTO(out_ladvise, rc = -EINVAL);
2750                         }
2751
2752                         /* Currently we only support stat-ahead operations. */
2753                         if (!(ladvise->lla_access_flags & ACCESS_FL_STAT)) {
2754                                 CDEBUG(D_VFSTRACE,
2755                                        "%s: Invalid access flags (%x) for %s\n",
2756                                        sbi->ll_fsname,
2757                                        ladvise->lla_access_flags,
2758                                        ladvise_names[ladvise->lla_advice]);
2759                                 GOTO(out_ladvise, rc = -EINVAL);
2760                         }
2761
2762                         rc = ll_ioctl_ahead(file, ladvise);
2763                         break;
2764                 default:
2765                         rc = -EINVAL;
2766                 }
2767 out_ladvise:
2768                 OBD_FREE_PTR(ladvise);
2769                 RETURN(rc);
2770         }
2771         case LL_IOC_PCC_DETACH_BY_FID: {
2772                 struct lu_pcc_detach_fid *detach;
2773                 struct lu_fid *fid;
2774                 struct inode *inode2;
2775                 unsigned long ino;
2776
2777                 OBD_ALLOC_PTR(detach);
2778                 if (detach == NULL)
2779                         RETURN(-ENOMEM);
2780
2781                 if (copy_from_user(detach, uarg, sizeof(*detach)))
2782                         GOTO(out_detach, rc = -EFAULT);
2783
2784                 fid = &detach->pccd_fid;
2785                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2786                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2787                 if (inode2 == NULL)
2788                         /* Target inode is not in inode cache, and PCC file
2789                          * has aleady released, return immdiately.
2790                          */
2791                         GOTO(out_detach, rc = 0);
2792
2793                 if (!S_ISREG(inode2->i_mode))
2794                         GOTO(out_iput, rc = -EINVAL);
2795
2796                 if (!inode_owner_or_capable(&nop_mnt_idmap, inode2))
2797                         GOTO(out_iput, rc = -EPERM);
2798
2799                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2800 out_iput:
2801                 iput(inode2);
2802 out_detach:
2803                 OBD_FREE_PTR(detach);
2804                 RETURN(rc);
2805         }
2806         default:
2807                 rc = ll_iocontrol(inode, file, cmd, uarg);
2808                 if (rc != -ENOTTY)
2809                         RETURN(rc);
2810                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL, uarg));
2811         }
2812 }
2813
2814 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2815 {
2816         struct inode *inode = file->f_mapping->host;
2817         struct ll_file_data *fd = file->private_data;
2818         struct ll_sb_info *sbi = ll_i2sbi(inode);
2819         int api32 = ll_need_32bit_api(sbi);
2820         loff_t ret = -EINVAL;
2821
2822         ENTRY;
2823         ll_inode_lock(inode);
2824         switch (origin) {
2825         case SEEK_SET:
2826                 break;
2827         case SEEK_CUR:
2828                 offset += file->f_pos;
2829                 break;
2830         case SEEK_END:
2831                 if (offset > 0)
2832                         GOTO(out, ret);
2833                 if (api32)
2834                         offset += LL_DIR_END_OFF_32BIT;
2835                 else
2836                         offset += LL_DIR_END_OFF;
2837                 break;
2838         default:
2839                 GOTO(out, ret);
2840         }
2841
2842         if (offset >= 0 &&
2843             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2844              (!api32 && offset <= LL_DIR_END_OFF))) {
2845                 if (offset != file->f_pos) {
2846                         bool hash64;
2847
2848                         hash64 = test_bit(LL_SBI_64BIT_HASH, sbi->ll_flags);
2849                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2850                             (!api32 && offset == LL_DIR_END_OFF))
2851                                 fd->lfd_pos = MDS_DIR_END_OFF;
2852                         else if (api32 && hash64)
2853                                 fd->lfd_pos = offset << 32;
2854                         else
2855                                 fd->lfd_pos = offset;
2856                         file->f_pos = offset;
2857                         file->f_version = 0;
2858                 }
2859                 ret = offset;
2860         }
2861         GOTO(out, ret);
2862
2863 out:
2864         ll_inode_unlock(inode);
2865         return ret;
2866 }
2867
2868 static int ll_dir_open(struct inode *inode, struct file *file)
2869 {
2870         ENTRY;
2871         RETURN(ll_file_open(inode, file));
2872 }
2873
2874 static int ll_dir_release(struct inode *inode, struct file *file)
2875 {
2876         ENTRY;
2877         RETURN(ll_file_release(inode, file));
2878 }
2879
2880 /* notify error if partially read striped directory */
2881 static int ll_dir_flush(struct file *file, fl_owner_t id)
2882 {
2883         struct ll_file_data *lfd = file->private_data;
2884         int rc = lfd->fd_partial_readdir_rc;
2885
2886         lfd->fd_partial_readdir_rc = 0;
2887
2888         return rc;
2889 }
2890
2891 const struct file_operations ll_dir_operations = {
2892         .llseek         = ll_dir_seek,
2893         .open           = ll_dir_open,
2894         .release        = ll_dir_release,
2895         .read           = generic_read_dir,
2896 #ifdef HAVE_DIR_CONTEXT
2897         .iterate_shared = ll_iterate,
2898 #else
2899         .readdir        = ll_readdir,
2900 #endif
2901         .unlocked_ioctl = ll_dir_ioctl,
2902         .fsync          = ll_fsync,
2903         .flush          = ll_dir_flush,
2904 };