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 <uapi/linux/llcrypt.h>
  53 #include <lustre_lib.h>
  54 #include <lustre_dlm.h>
  55 #include <lustre_fid.h>
  56 #include <lustre_kernelcomm.h>
  57 #include <lustre_swab.h>
  58
  59 #include "llite_internal.h"
  60
  61 /*
  62  * (new) readdir implementation overview.
  63  *
  64  * Original lustre readdir implementation cached exact copy of raw directory
  65  * pages on the client. These pages were indexed in client page cache by
  66  * logical offset in the directory file. This design, while very simple and
  67  * intuitive had some inherent problems:
  68  *
  69  *     . it implies that byte offset to the directory entry serves as a
  70  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  71  *     ext3/htree directory entries may move due to splits, and more
  72  *     importantly,
  73  *
  74  *     . it is incompatible with the design of split directories for cmd3,
  75  *     that assumes that names are distributed across nodes based on their
  76  *     hash, and so readdir should be done in hash order.
  77  *
  78  * New readdir implementation does readdir in hash order, and uses hash of a
  79  * file name as a telldir/seekdir cookie. This led to number of complications:
  80  *
  81  *     . hash is not unique, so it cannot be used to index cached directory
  82  *     pages on the client (note, that it requires a whole pageful of hash
  83  *     collided entries to cause two pages to have identical hashes);
  84  *
  85  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  86  *     entry cookie. ext3/htree has the same problem and lustre implementation
  87  *     mimics their solution: seekdir(hash) positions directory at the first
  88  *     entry with the given hash.
  89  *
  90  * Client side.
  91  *
  92  * 0. caching
  93  *
  94  * Client caches directory pages using hash of the first entry as an index. As
  95  * noted above hash is not unique, so this solution doesn't work as is:
  96  * special processing is needed for "page hash chains" (i.e., sequences of
  97  * pages filled with entries all having the same hash value).
  98  *
  99  * First, such chains have to be detected. To this end, server returns to the
 100  * client the hash of the first entry on the page next to one returned. When
 101  * client detects that this hash is the same as hash of the first entry on the
 102  * returned page, page hash collision has to be handled. Pages in the
 103  * hash chain, except first one, are termed "overflow pages".
 104  *
 105  * Proposed (unimplimented) solution to index uniqueness problem is to
 106  * not cache overflow pages.  Instead, when page hash collision is
 107  * detected, all overflow pages from emerging chain should be
 108  * immediately requested from the server and placed in a special data
 109  * structure.  This data structure can be used by ll_readdir() to
 110  * process entries from overflow pages.  When readdir invocation
 111  * finishes, overflow pages are discarded.  If page hash collision chain
 112  * weren't completely processed, next call to readdir will again detect
 113  * page hash collision, again read overflow pages in, process next
 114  * portion of entries and again discard the pages.  This is not as
 115  * wasteful as it looks, because, given reasonable hash, page hash
 116  * collisions are extremely rare.
 117  *
 118  * 1. directory positioning
 119  *
 120  * When seekdir(hash) is called, original
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  *
 128  *
 129  * Server.
 130  *
 131  * identification of and access to overflow pages
 132  *
 133  * page format
 134  *
 135  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 136  * a header lu_dirpage which describes the start/end hash, and whether this
 137  * page is empty (contains no dir entry) or hash collide with next page.
 138  * After client receives reply, several pages will be integrated into dir page
 139  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 140  * lu_dirpage for this integrated page will be adjusted. See
 141  * mdc_adjust_dirpages().
 142  *
 143  */
 144 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 145                              __u64 offset)
 146 {
 147         struct md_callback      cb_op;
 148         struct page             *page;
 149         int                     rc;
 150
 151         cb_op.md_blocking_ast = ll_md_blocking_ast;
 152         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 153         if (rc != 0)
 154                 return ERR_PTR(rc);
 155
 156         return page;
 157 }
 158
 159 void ll_release_page(struct inode *inode, struct page *page,
 160                      bool remove)
 161 {
 162         kunmap(page);
 163
 164         /* Always remove the page for striped dir, because the page is
 165          * built from temporarily in LMV layer */
 166         if (inode && ll_dir_striped(inode)) {
 167                 __free_page(page);
 168                 return;
 169         }
 170
 171         if (remove) {
 172                 lock_page(page);
 173                 if (likely(page->mapping != NULL))
 174                         delete_from_page_cache(page);
 175                 unlock_page(page);
 176         }
 177         put_page(page);
 178 }
 179
 180 #ifdef HAVE_DIR_CONTEXT
 181 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 182                 struct dir_context *ctx)
 183 {
 184 #else
 185 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 186                 void *cookie, filldir_t filldir)
 187 {
 188 #endif
 189         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 190         __u64                 pos        = *ppos;
 191         bool                  is_api32 = ll_need_32bit_api(sbi);
 192         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 193         struct page          *page;
 194         bool                  done = false;
 195         int                   rc = 0;
 196         ENTRY;
 197
 198         page = ll_get_dir_page(inode, op_data, pos);
 199
 200         while (rc == 0 && !done) {
 201                 struct lu_dirpage *dp;
 202                 struct lu_dirent  *ent;
 203                 __u64 hash;
 204                 __u64 next;
 205
 206                 if (IS_ERR(page)) {
 207                         rc = PTR_ERR(page);
 208                         break;
 209                 }
 210
 211                 hash = MDS_DIR_END_OFF;
 212                 dp = page_address(page);
 213                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 214                      ent = lu_dirent_next(ent)) {
 215                         __u16          type;
 216                         int            namelen;
 217                         struct lu_fid  fid;
 218                         __u64          lhash;
 219                         __u64          ino;
 220
 221                         hash = le64_to_cpu(ent->lde_hash);
 222                         if (hash < pos) /* Skip until we find target hash */
 223                                 continue;
 224
 225                         namelen = le16_to_cpu(ent->lde_namelen);
 226                         if (namelen == 0) /* Skip dummy record */
 227                                 continue;
 228
 229                         if (is_api32 && is_hash64)
 230                                 lhash = hash >> 32;
 231                         else
 232                                 lhash = hash;
 233                         fid_le_to_cpu(&fid, &ent->lde_fid);
 234                         ino = cl_fid_build_ino(&fid, is_api32);
 235                         type = S_DT(lu_dirent_type_get(ent));
 236                         /* For ll_nfs_get_name_filldir(), it will try to access
 237                          * 'ent' through 'lde_name', so the parameter 'name'
 238                          * for 'filldir()' must be part of the 'ent'. */
 239 #ifdef HAVE_DIR_CONTEXT
 240                         ctx->pos = lhash;
 241                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 242                                          type);
 243 #else
 244                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 245                                        ino, type);
 246 #endif
 247                 }
 248
 249                 if (done) {
 250                         pos = hash;
 251                         ll_release_page(inode, page, false);
 252                         break;
 253                 }
 254
 255                 next = le64_to_cpu(dp->ldp_hash_end);
 256                 pos = next;
 257                 if (pos == MDS_DIR_END_OFF) {
 258                         /*
 259                          * End of directory reached.
 260                          */
 261                         done = 1;
 262                         ll_release_page(inode, page, false);
 263                 } else {
 264                         /*
 265                          * Normal case: continue to the next
 266                          * page.
 267                          */
 268                         ll_release_page(inode, page,
 269                                         le32_to_cpu(dp->ldp_flags) &
 270                                         LDF_COLLIDE);
 271                         next = pos;
 272                         page = ll_get_dir_page(inode, op_data, pos);
 273                 }
 274         }
 275 #ifdef HAVE_DIR_CONTEXT
 276         ctx->pos = pos;
 277 #else
 278         *ppos = pos;
 279 #endif
 280         RETURN(rc);
 281 }
 282
 283 #ifdef HAVE_DIR_CONTEXT
 284 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 285 #else
 286 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 287 #endif
 288 {
 289         struct inode *inode = file_inode(filp);
 290         struct ll_file_data *lfd = filp->private_data;
 291         struct ll_sb_info *sbi = ll_i2sbi(inode);
 292         int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 293         int api32 = ll_need_32bit_api(sbi);
 294         struct md_op_data *op_data;
 295         struct lu_fid pfid = { 0 };
 296         ktime_t kstart = ktime_get();
 297         __u64 pos;
 298         int rc;
 299         ENTRY;
 300
 301         if (lfd != NULL)
 302                 pos = lfd->lfd_pos;
 303         else
 304                 pos = 0;
 305
 306         CDEBUG(D_VFSTRACE,
 307                "VFS Op:inode="DFID"(%p) pos/size%lu/%llu 32bit_api %d\n",
 308                PFID(ll_inode2fid(inode)),
 309                inode, (unsigned long)pos, i_size_read(inode), api32);
 310
 311         if (pos == MDS_DIR_END_OFF)
 312                 /*
 313                  * end-of-file.
 314                  */
 315                 GOTO(out, rc = 0);
 316
 317         if (unlikely(ll_dir_striped(inode))) {
 318                 /*
 319                  * This is only needed for striped dir to fill ..,
 320                  * see lmv_read_page()
 321                  */
 322                 if (file_dentry(filp)->d_parent != NULL &&
 323                     file_dentry(filp)->d_parent->d_inode != NULL) {
 324                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 325                         struct inode *parent =
 326                                 file_dentry(filp)->d_parent->d_inode;
 327
 328                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 329                                 pfid = *ll_inode2fid(parent);
 330                 }
 331
 332                 /* If it can not find in cache, do lookup .. on the master
 333                  * object */
 334                 if (fid_is_zero(&pfid)) {
 335                         rc = ll_dir_get_parent_fid(inode, &pfid);
 336                         if (rc != 0)
 337                                 RETURN(rc);
 338                 }
 339         }
 340
 341         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 342                                      LUSTRE_OPC_ANY, inode);
 343         if (IS_ERR(op_data))
 344                 GOTO(out, rc = PTR_ERR(op_data));
 345
 346         /* foreign dirs are browsed out of Lustre */
 347         if (unlikely(op_data->op_mea1 != NULL &&
 348                      op_data->op_mea1->lsm_md_magic == LMV_MAGIC_FOREIGN)) {
 349                 ll_finish_md_op_data(op_data);
 350                 RETURN(-ENODATA);
 351         }
 352
 353         op_data->op_fid3 = pfid;
 354
 355 #ifdef HAVE_DIR_CONTEXT
 356         ctx->pos = pos;
 357         rc = ll_dir_read(inode, &pos, op_data, ctx);
 358         pos = ctx->pos;
 359 #else
 360         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 361 #endif
 362         if (lfd != NULL)
 363                 lfd->lfd_pos = pos;
 364
 365         if (pos == MDS_DIR_END_OFF) {
 366                 if (api32)
 367                         pos = LL_DIR_END_OFF_32BIT;
 368                 else
 369                         pos = LL_DIR_END_OFF;
 370         } else {
 371                 if (api32 && hash64)
 372                         pos = pos >> 32;
 373         }
 374 #ifdef HAVE_DIR_CONTEXT
 375         ctx->pos = pos;
 376 #else
 377         filp->f_pos = pos;
 378 #endif
 379         ll_finish_md_op_data(op_data);
 380
 381 out:
 382         if (!rc)
 383                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR,
 384                                    ktime_us_delta(ktime_get(), kstart));
 385
 386         RETURN(rc);
 387 }
 388
 389 /**
 390  * Create striped directory with specified stripe(@lump)
 391  *
 392  * \param[in] dparent   the parent of the directory.
 393  * \param[in] lump      the specified stripes.
 394  * \param[in] dirname   the name of the directory.
 395  * \param[in] mode      the specified mode of the directory.
 396  *
 397  * \retval              =0 if striped directory is being created successfully.
 398  *                      <0 if the creation is failed.
 399  */
 400 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 401                                size_t len, const char *dirname, umode_t mode,
 402                                bool createonly)
 403 {
 404         struct inode *parent = dparent->d_inode;
 405         struct ptlrpc_request *request = NULL;
 406         struct md_op_data *op_data;
 407         struct ll_sb_info *sbi = ll_i2sbi(parent);
 408         struct inode *inode = NULL;
 409         struct dentry dentry = {
 410                 .d_parent = dparent,
 411                 .d_name = {
 412                         .name = dirname,
 413                         .len = strlen(dirname),
 414                         .hash = ll_full_name_hash(dparent, dirname,
 415                                                   strlen(dirname)),
 416                 },
 417         };
 418         bool encrypt = false;
 419         int err;
 420         ENTRY;
 421
 422         if (unlikely(!lmv_user_magic_supported(lump->lum_magic)))
 423                 RETURN(-EINVAL);
 424
 425         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 426                 CDEBUG(D_VFSTRACE,
 427                        "VFS Op:inode="DFID"(%p) name %s stripe_offset %d, stripe_count: %u\n",
 428                        PFID(ll_inode2fid(parent)), parent, dirname,
 429                        (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 430         } else {
 431                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 432
 433                 CDEBUG(D_VFSTRACE,
 434                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 435                        PFID(ll_inode2fid(parent)), parent, dirname,
 436                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 437         }
 438
 439         if (lump->lum_stripe_count > 1 &&
 440             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 441                 RETURN(-EINVAL);
 442
 443         if (IS_DEADDIR(parent) &&
 444             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 445                 RETURN(-ENOENT);
 446
 447         /* MDS < 2.14 doesn't support 'crush' hash type, and cannot handle
 448          * unknown hash if client doesn't set a valid one. switch to fnv_1a_64.
 449          */
 450         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_CRUSH)) {
 451                 enum lmv_hash_type type = lump->lum_hash_type &
 452                                           LMV_HASH_TYPE_MASK;
 453
 454                 if (type == LMV_HASH_TYPE_CRUSH ||
 455                     type == LMV_HASH_TYPE_UNKNOWN)
 456                         lump->lum_hash_type = (lump->lum_hash_type ^ type) |
 457                                               LMV_HASH_TYPE_FNV_1A_64;
 458         }
 459
 460         if (unlikely(!lmv_user_magic_supported(cpu_to_le32(lump->lum_magic))))
 461                 lustre_swab_lmv_user_md(lump);
 462
 463         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 464                 mode &= ~current_umask();
 465         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 466         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 467                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 468                                      lump);
 469         if (IS_ERR(op_data))
 470                 RETURN(PTR_ERR(op_data));
 471
 472         if (ll_sbi_has_encrypt(sbi) &&
 473             (IS_ENCRYPTED(parent) ||
 474             unlikely(llcrypt_dummy_context_enabled(parent)))) {
 475                 err = llcrypt_get_encryption_info(parent);
 476                 if (err)
 477                         GOTO(out_op_data, err);
 478                 if (!llcrypt_has_encryption_key(parent))
 479                         GOTO(out_op_data, err = -ENOKEY);
 480                 encrypt = true;
 481         }
 482
 483         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 484                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 485                  * to determine the security context for the file. So our fake
 486                  * dentry should be real enough for this purpose. */
 487                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 488                                               &op_data->op_file_secctx_name,
 489                                               &op_data->op_file_secctx,
 490                                               &op_data->op_file_secctx_size);
 491                 if (err < 0)
 492                         GOTO(out_op_data, err);
 493         }
 494
 495         if (encrypt) {
 496                 err = llcrypt_inherit_context(parent, NULL, op_data, false);
 497                 if (err)
 498                         GOTO(out_op_data, err);
 499         }
 500
 501         op_data->op_cli_flags |= CLI_SET_MEA;
 502         if (createonly)
 503                 op_data->op_bias |= MDS_SETSTRIPE_CREATE;
 504
 505         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 506                         from_kuid(&init_user_ns, current_fsuid()),
 507                         from_kgid(&init_user_ns, current_fsgid()),
 508                         cfs_curproc_cap_pack(), 0, &request);
 509         if (err)
 510                 GOTO(out_request, err);
 511
 512         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 513
 514         err = ll_prep_inode(&inode, &request->rq_pill, parent->i_sb, NULL);
 515         if (err)
 516                 GOTO(out_inode, err);
 517
 518         dentry.d_inode = inode;
 519
 520         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 521                 /* no need to protect selinux_inode_setsecurity() by
 522                  * inode_lock. Taking it would lead to a client deadlock
 523                  * LU-13617
 524                  */
 525                 err = security_inode_notifysecctx(inode,
 526                                                   op_data->op_file_secctx,
 527                                                   op_data->op_file_secctx_size);
 528         } else {
 529                 err = ll_inode_init_security(&dentry, inode, parent);
 530         }
 531         if (err)
 532                 GOTO(out_inode, err);
 533
 534         if (encrypt) {
 535                 err = ll_set_encflags(inode, op_data->op_file_encctx,
 536                                       op_data->op_file_encctx_size, false);
 537                 if (err)
 538                         GOTO(out_inode, err);
 539         }
 540
 541 out_inode:
 542         iput(inode);
 543 out_request:
 544         ptlrpc_req_finished(request);
 545 out_op_data:
 546         ll_finish_md_op_data(op_data);
 547
 548         return err;
 549 }
 550
 551 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 552                      int set_default)
 553 {
 554         struct ll_sb_info *sbi = ll_i2sbi(inode);
 555         struct md_op_data *op_data;
 556         struct ptlrpc_request *req = NULL;
 557         int rc = 0;
 558         int lum_size;
 559         ENTRY;
 560
 561         if (lump != NULL) {
 562                 switch (lump->lmm_magic) {
 563                 case LOV_USER_MAGIC_V1:
 564                         lum_size = sizeof(struct lov_user_md_v1);
 565                         break;
 566                 case LOV_USER_MAGIC_V3:
 567                         lum_size = sizeof(struct lov_user_md_v3);
 568                         break;
 569                 case LOV_USER_MAGIC_COMP_V1:
 570                         lum_size = ((struct lov_comp_md_v1 *)lump)->lcm_size;
 571                         break;
 572                 case LMV_USER_MAGIC:
 573                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 574                                 lustre_swab_lmv_user_md(
 575                                         (struct lmv_user_md *)lump);
 576                         lum_size = sizeof(struct lmv_user_md);
 577                         break;
 578                 case LOV_USER_MAGIC_SPECIFIC: {
 579                         struct lov_user_md_v3 *v3 =
 580                                 (struct lov_user_md_v3 *)lump;
 581                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 582                                 RETURN(-EINVAL);
 583                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 584                                                     LOV_USER_MAGIC_SPECIFIC);
 585                         break;
 586                 }
 587                 default:
 588                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 589                                         " %#08x != %#08x nor %#08x\n",
 590                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 591                                         LOV_USER_MAGIC_V3);
 592                         RETURN(-EINVAL);
 593                 }
 594
 595                 /*
 596                  * This is coming from userspace, so should be in
 597                  * local endian.  But the MDS would like it in little
 598                  * endian, so we swab it before we send it.
 599                  */
 600                 if ((__swab32(lump->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
 601                     le32_to_cpu(LOV_MAGIC_MAGIC))
 602                         lustre_swab_lov_user_md(lump, 0);
 603         } else {
 604                 lum_size = sizeof(struct lov_user_md_v1);
 605         }
 606
 607         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 608                                      LUSTRE_OPC_ANY, NULL);
 609         if (IS_ERR(op_data))
 610                 RETURN(PTR_ERR(op_data));
 611
 612         /* swabbing is done in lov_setstripe() on server side */
 613         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 614         ll_finish_md_op_data(op_data);
 615         ptlrpc_req_finished(req);
 616         if (rc)
 617                 RETURN(rc);
 618
 619         RETURN(rc);
 620 }
 621
 622 static int ll_dir_get_default_layout(struct inode *inode, void **plmm,
 623                                      int *plmm_size,
 624                                      struct ptlrpc_request **request, u64 valid,
 625                                      enum get_default_layout_type type)
 626 {
 627         struct ll_sb_info *sbi = ll_i2sbi(inode);
 628         struct mdt_body   *body;
 629         struct lov_mds_md *lmm = NULL;
 630         struct ptlrpc_request *req = NULL;
 631         int rc, lmm_size;
 632         struct md_op_data *op_data;
 633         struct lu_fid fid;
 634         ENTRY;
 635
 636         rc = ll_get_default_mdsize(sbi, &lmm_size);
 637         if (rc)
 638                 RETURN(rc);
 639
 640         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 641                                      0, lmm_size, LUSTRE_OPC_ANY,
 642                                      NULL);
 643         if (IS_ERR(op_data))
 644                 RETURN(PTR_ERR(op_data));
 645
 646         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 647
 648         if (type == GET_DEFAULT_LAYOUT_ROOT) {
 649                 lu_root_fid(&op_data->op_fid1);
 650                 fid = op_data->op_fid1;
 651         } else {
 652                 fid = *ll_inode2fid(inode);
 653         }
 654
 655         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 656         ll_finish_md_op_data(op_data);
 657         if (rc < 0) {
 658                 CDEBUG(D_INFO, "md_getattr failed on inode "DFID": rc %d\n",
 659                        PFID(&fid), rc);
 660                 GOTO(out, rc);
 661         }
 662
 663         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 664         LASSERT(body != NULL);
 665
 666         lmm_size = body->mbo_eadatasize;
 667
 668         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 669             lmm_size == 0) {
 670                 GOTO(out, rc = -ENODATA);
 671         }
 672
 673         lmm = req_capsule_server_sized_get(&req->rq_pill,
 674                                            &RMF_MDT_MD, lmm_size);
 675         LASSERT(lmm != NULL);
 676
 677         /*
 678          * This is coming from the MDS, so is probably in
 679          * little endian.  We convert it to host endian before
 680          * passing it to userspace.
 681          */
 682         /* We don't swab objects for directories */
 683         switch (le32_to_cpu(lmm->lmm_magic)) {
 684         case LOV_MAGIC_V1:
 685         case LOV_MAGIC_V3:
 686         case LOV_MAGIC_COMP_V1:
 687         case LOV_USER_MAGIC_SPECIFIC:
 688                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 689                         lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
 690                 break;
 691         case LMV_MAGIC_V1:
 692                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 693                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 694                 break;
 695         case LMV_USER_MAGIC:
 696                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 697                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 698                 break;
 699         case LMV_MAGIC_FOREIGN: {
 700                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 701
 702                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 703                         __swab32s(&lfm->lfm_magic);
 704                         __swab32s(&lfm->lfm_length);
 705                         __swab32s(&lfm->lfm_type);
 706                         __swab32s(&lfm->lfm_flags);
 707                 }
 708                 break;
 709         }
 710         default:
 711                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 712                 rc = -EPROTO;
 713         }
 714 out:
 715         *plmm = lmm;
 716         *plmm_size = lmm_size;
 717         *request = req;
 718         return rc;
 719 }
 720
 721 /**
 722  * This function will be used to get default LOV/LMV/Default LMV
 723  * @valid will be used to indicate which stripe it will retrieve.
 724  * If the directory does not have its own default layout, then the
 725  * function will request the default layout from root FID.
 726  *      OBD_MD_MEA              LMV stripe EA
 727  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 728  *      otherwise               Default LOV EA.
 729  * Each time, it can only retrieve 1 stripe EA
 730  **/
 731 int ll_dir_getstripe_default(struct inode *inode, void **plmm, int *plmm_size,
 732                              struct ptlrpc_request **request,
 733                              struct ptlrpc_request **root_request,
 734                              u64 valid)
 735 {
 736         struct ptlrpc_request *req = NULL;
 737         struct ptlrpc_request *root_req = NULL;
 738         struct lov_mds_md *lmm = NULL;
 739         int lmm_size = 0;
 740         int rc = 0;
 741         ENTRY;
 742
 743         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 744                                        &req, valid, 0);
 745         if (rc == -ENODATA && !fid_is_root(ll_inode2fid(inode)) &&
 746             !(valid & (OBD_MD_MEA|OBD_MD_DEFAULT_MEA)) && root_request != NULL){
 747                 int rc2 = ll_dir_get_default_layout(inode, (void **)&lmm,
 748                                                     &lmm_size, &root_req, valid,
 749                                                     GET_DEFAULT_LAYOUT_ROOT);
 750                 if (rc2 == 0)
 751                         rc = 0;
 752         }
 753
 754         *plmm = lmm;
 755         *plmm_size = lmm_size;
 756         *request = req;
 757         if (root_request != NULL)
 758                 *root_request = root_req;
 759
 760         RETURN(rc);
 761 }
 762
 763 /**
 764  * This function will be used to get default LOV/LMV/Default LMV
 765  * @valid will be used to indicate which stripe it will retrieve
 766  *      OBD_MD_MEA              LMV stripe EA
 767  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 768  *      otherwise               Default LOV EA.
 769  * Each time, it can only retrieve 1 stripe EA
 770  **/
 771 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 772                      struct ptlrpc_request **request, u64 valid)
 773 {
 774         struct ptlrpc_request *req = NULL;
 775         struct lov_mds_md *lmm = NULL;
 776         int lmm_size = 0;
 777         int rc = 0;
 778         ENTRY;
 779
 780         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 781                                        &req, valid, 0);
 782
 783         *plmm = lmm;
 784         *plmm_size = lmm_size;
 785         *request = req;
 786
 787         RETURN(rc);
 788 }
 789
 790 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 791 {
 792         struct md_op_data       *op_data;
 793         int                     rc;
 794         int                     mdt_index;
 795         ENTRY;
 796
 797         OBD_ALLOC_PTR(op_data);
 798         if (op_data == NULL)
 799                 RETURN(-ENOMEM);
 800
 801         op_data->op_flags |= MF_GET_MDT_IDX;
 802         op_data->op_fid1 = *fid;
 803         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 804         mdt_index = op_data->op_mds;
 805         OBD_FREE_PTR(op_data);
 806         if (rc < 0)
 807                 RETURN(rc);
 808
 809         RETURN(mdt_index);
 810 }
 811
 812 /*
 813  *  Get MDT index for the inode.
 814  */
 815 int ll_get_mdt_idx(struct inode *inode)
 816 {
 817         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 818 }
 819
 820 /**
 821  * Generic handler to do any pre-copy work.
 822  *
 823  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 824  * first information for it that real work has started.
 825  *
 826  * Moreover, for a ARCHIVE request, it will sample the file data version and
 827  * store it in \a copy.
 828  *
 829  * \return 0 on success.
 830  */
 831 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 832 {
 833         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 834         struct hsm_progress_kernel       hpk;
 835         int                              rc = 0;
 836         int                              rc2;
 837         ENTRY;
 838
 839         /* Forge a hsm_progress based on data from copy. */
 840         hpk.hpk_fid = copy->hc_hai.hai_fid;
 841         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 842         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 843         hpk.hpk_extent.length = 0;
 844         hpk.hpk_flags = 0;
 845         hpk.hpk_errval = 0;
 846         hpk.hpk_data_version = 0;
 847
 848
 849         /* For archive request, we need to read the current file version. */
 850         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 851                 struct inode    *inode;
 852                 __u64            data_version = 0;
 853
 854                 /* Get inode for this fid */
 855                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 856                 if (IS_ERR(inode)) {
 857                         hpk.hpk_flags |= HP_FLAG_RETRY;
 858                         /* hpk_errval is >= 0 */
 859                         hpk.hpk_errval = -PTR_ERR(inode);
 860                         GOTO(progress, rc = PTR_ERR(inode));
 861                 }
 862
 863                 /* Read current file data version */
 864                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 865                 iput(inode);
 866                 if (rc != 0) {
 867                         CDEBUG(D_HSM, "Could not read file data version of "
 868                                       DFID" (rc = %d). Archive request ("
 869                                       "%#llx) could not be done.\n",
 870                                       PFID(&copy->hc_hai.hai_fid), rc,
 871                                       copy->hc_hai.hai_cookie);
 872                         hpk.hpk_flags |= HP_FLAG_RETRY;
 873                         /* hpk_errval must be >= 0 */
 874                         hpk.hpk_errval = -rc;
 875                         GOTO(progress, rc);
 876                 }
 877
 878                 /* Store in the hsm_copy for later copytool use.
 879                  * Always modified even if no lsm. */
 880                 copy->hc_data_version = data_version;
 881         }
 882
 883 progress:
 884         /* On error, the request should be considered as completed */
 885         if (hpk.hpk_errval > 0)
 886                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 887
 888         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 889                             &hpk, NULL);
 890
 891         /* Return first error */
 892         RETURN(rc != 0 ? rc : rc2);
 893 }
 894
 895 /**
 896  * Generic handler to do any post-copy work.
 897  *
 898  * It will send the last hsm_progress update to coordinator to inform it
 899  * that copy is finished and whether it was successful or not.
 900  *
 901  * Moreover,
 902  * - for ARCHIVE request, it will sample the file data version and compare it
 903  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 904  *   will be considered as failed.
 905  * - for RESTORE request, it will sample the file data version and send it to
 906  *   coordinator which is useful if the file was imported as 'released'.
 907  *
 908  * \return 0 on success.
 909  */
 910 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 911 {
 912         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 913         struct hsm_progress_kernel       hpk;
 914         int                              rc = 0;
 915         int                              rc2;
 916         ENTRY;
 917
 918         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 919         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 920          * initialized if copy_end was called with copy == NULL.
 921          */
 922
 923         /* Forge a hsm_progress based on data from copy. */
 924         hpk.hpk_fid = copy->hc_hai.hai_fid;
 925         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 926         hpk.hpk_extent = copy->hc_hai.hai_extent;
 927         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 928         hpk.hpk_errval = copy->hc_errval;
 929         hpk.hpk_data_version = 0;
 930
 931         /* For archive request, we need to check the file data was not changed.
 932          *
 933          * For restore request, we need to send the file data version, this is
 934          * useful when the file was created using hsm_import.
 935          */
 936         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 937              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 938             (copy->hc_errval == 0)) {
 939                 struct inode    *inode;
 940                 __u64            data_version = 0;
 941
 942                 /* Get lsm for this fid */
 943                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 944                 if (IS_ERR(inode)) {
 945                         hpk.hpk_flags |= HP_FLAG_RETRY;
 946                         /* hpk_errval must be >= 0 */
 947                         hpk.hpk_errval = -PTR_ERR(inode);
 948                         GOTO(progress, rc = PTR_ERR(inode));
 949                 }
 950
 951                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 952                 iput(inode);
 953                 if (rc) {
 954                         CDEBUG(D_HSM, "Could not read file data version. "
 955                                       "Request could not be confirmed.\n");
 956                         if (hpk.hpk_errval == 0)
 957                                 hpk.hpk_errval = -rc;
 958                         GOTO(progress, rc);
 959                 }
 960
 961                 /* Store in the hsm_copy for later copytool use.
 962                  * Always modified even if no lsm. */
 963                 hpk.hpk_data_version = data_version;
 964
 965                 /* File could have been stripped during archiving, so we need
 966                  * to check anyway. */
 967                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 968                     (copy->hc_data_version != data_version)) {
 969                         CDEBUG(D_HSM, "File data version mismatched. "
 970                               "File content was changed during archiving. "
 971                                DFID", start:%#llx current:%#llx\n",
 972                                PFID(&copy->hc_hai.hai_fid),
 973                                copy->hc_data_version, data_version);
 974                         /* File was changed, send error to cdt. Do not ask for
 975                          * retry because if a file is modified frequently,
 976                          * the cdt will loop on retried archive requests.
 977                          * The policy engine will ask for a new archive later
 978                          * when the file will not be modified for some tunable
 979                          * time */
 980                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 981                         rc = -EBUSY;
 982                         /* hpk_errval must be >= 0 */
 983                         hpk.hpk_errval = -rc;
 984                         GOTO(progress, rc);
 985                 }
 986
 987         }
 988
 989 progress:
 990         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 991                             &hpk, NULL);
 992
 993         /* Return first error */
 994         RETURN(rc != 0 ? rc : rc2);
 995 }
 996
 997
 998 static int copy_and_ct_start(int cmd, struct obd_export *exp,
 999                              const struct lustre_kernelcomm __user *data)
1000 {
1001         struct lustre_kernelcomm *lk;
1002         struct lustre_kernelcomm *tmp;
1003         size_t size = sizeof(*lk);
1004         size_t new_size;
1005         int i;
1006         int rc;
1007
1008         /* copy data from userspace to get numbers of archive_id */
1009         OBD_ALLOC(lk, size);
1010         if (lk == NULL)
1011                 return -ENOMEM;
1012
1013         if (copy_from_user(lk, data, size))
1014                 GOTO(out_lk, rc = -EFAULT);
1015
1016         if (lk->lk_flags & LK_FLG_STOP)
1017                 goto do_ioctl;
1018
1019         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1020                 __u32 archive_mask = lk->lk_data_count;
1021                 int count;
1022
1023                 /* old hsm agent to old MDS */
1024                 if (!exp_connect_archive_id_array(exp))
1025                         goto do_ioctl;
1026
1027                 /* old hsm agent to new MDS */
1028                 lk->lk_flags |= LK_FLG_DATANR;
1029
1030                 if (archive_mask == 0)
1031                         goto do_ioctl;
1032
1033                 count = hweight32(archive_mask);
1034                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1035                 OBD_ALLOC(tmp, new_size);
1036                 if (tmp == NULL)
1037                         GOTO(out_lk, rc = -ENOMEM);
1038
1039                 memcpy(tmp, lk, size);
1040                 tmp->lk_data_count = count;
1041                 OBD_FREE(lk, size);
1042                 lk = tmp;
1043                 size = new_size;
1044
1045                 count = 0;
1046                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1047                         if (BIT(i) & archive_mask) {
1048                                 lk->lk_data[count] = i + 1;
1049                                 count++;
1050                         }
1051                 }
1052                 goto do_ioctl;
1053         }
1054
1055         /* new hsm agent to new mds */
1056         if (lk->lk_data_count > 0) {
1057                 new_size = offsetof(struct lustre_kernelcomm,
1058                                     lk_data[lk->lk_data_count]);
1059                 OBD_ALLOC(tmp, new_size);
1060                 if (tmp == NULL)
1061                         GOTO(out_lk, rc = -ENOMEM);
1062
1063                 OBD_FREE(lk, size);
1064                 lk = tmp;
1065                 size = new_size;
1066
1067                 if (copy_from_user(lk, data, size))
1068                         GOTO(out_lk, rc = -EFAULT);
1069         }
1070
1071         /* new hsm agent to old MDS */
1072         if (!exp_connect_archive_id_array(exp)) {
1073                 __u32 archives = 0;
1074
1075                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1076                         GOTO(out_lk, rc = -EINVAL);
1077
1078                 for (i = 0; i < lk->lk_data_count; i++) {
1079                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1080                                 rc = -EINVAL;
1081                                 CERROR("%s: archive id %d requested but only "
1082                                        "[0 - %zu] supported: rc = %d\n",
1083                                        exp->exp_obd->obd_name, lk->lk_data[i],
1084                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1085                                 GOTO(out_lk, rc);
1086                         }
1087
1088                         if (lk->lk_data[i] == 0) {
1089                                 archives = 0;
1090                                 break;
1091                         }
1092
1093                         archives |= (1 << (lk->lk_data[i] - 1));
1094                 }
1095                 lk->lk_flags &= ~LK_FLG_DATANR;
1096                 lk->lk_data_count = archives;
1097         }
1098 do_ioctl:
1099         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1100 out_lk:
1101         OBD_FREE(lk, size);
1102         return rc;
1103 }
1104
1105 static int check_owner(int type, int id)
1106 {
1107         switch (type) {
1108         case USRQUOTA:
1109                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1110                         return -EPERM;
1111                 break;
1112         case GRPQUOTA:
1113                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1114                         return -EPERM;
1115                 break;
1116         case PRJQUOTA:
1117                 break;
1118         }
1119         return 0;
1120 }
1121
1122 int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1123 {
1124         int cmd = qctl->qc_cmd;
1125         int type = qctl->qc_type;
1126         int id = qctl->qc_id;
1127         int valid = qctl->qc_valid;
1128         int rc = 0;
1129
1130         ENTRY;
1131
1132         switch (cmd) {
1133         case Q_SETQUOTA:
1134         case Q_SETINFO:
1135         case LUSTRE_Q_SETDEFAULT:
1136         case LUSTRE_Q_SETQUOTAPOOL:
1137         case LUSTRE_Q_SETINFOPOOL:
1138         case LUSTRE_Q_SETDEFAULT_POOL:
1139                 if (!capable(CAP_SYS_ADMIN))
1140                         RETURN(-EPERM);
1141                 break;
1142         case Q_GETQUOTA:
1143         case LUSTRE_Q_GETDEFAULT:
1144         case LUSTRE_Q_GETQUOTAPOOL:
1145         case LUSTRE_Q_GETDEFAULT_POOL:
1146                 if (check_owner(type, id) &&
1147                     (!capable(CAP_SYS_ADMIN)))
1148                         RETURN(-EPERM);
1149                 break;
1150         case Q_GETINFO:
1151         case LUSTRE_Q_GETINFOPOOL:
1152                 break;
1153         default:
1154                 CERROR("unsupported quotactl op: %#x\n", cmd);
1155                 RETURN(-ENOTSUPP);
1156         }
1157
1158         if (valid != QC_GENERAL) {
1159                 if (cmd == Q_GETINFO)
1160                         qctl->qc_cmd = Q_GETOINFO;
1161                 else if (cmd == Q_GETQUOTA ||
1162                          cmd == LUSTRE_Q_GETQUOTAPOOL)
1163                         qctl->qc_cmd = Q_GETOQUOTA;
1164                 else
1165                         RETURN(-EINVAL);
1166
1167                 switch (valid) {
1168                 case QC_MDTIDX:
1169                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1170                                            sizeof(*qctl), qctl, NULL);
1171                         break;
1172                 case QC_OSTIDX:
1173                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1174                                            sizeof(*qctl), qctl, NULL);
1175                         break;
1176                 case QC_UUID:
1177                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1178                                            sizeof(*qctl), qctl, NULL);
1179                         if (rc == -EAGAIN)
1180                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1181                                                    sbi->ll_dt_exp,
1182                                                    sizeof(*qctl), qctl, NULL);
1183                         break;
1184                 default:
1185                         rc = -EINVAL;
1186                         break;
1187                 }
1188
1189                 if (rc)
1190                         RETURN(rc);
1191
1192                 qctl->qc_cmd = cmd;
1193         } else {
1194                 struct obd_quotactl *oqctl;
1195                 int oqctl_len = sizeof(*oqctl);
1196
1197                 if (LUSTRE_Q_CMD_IS_POOL(cmd))
1198                         oqctl_len += LOV_MAXPOOLNAME + 1;
1199
1200                 OBD_ALLOC(oqctl, oqctl_len);
1201                 if (oqctl == NULL)
1202                         RETURN(-ENOMEM);
1203
1204                 QCTL_COPY(oqctl, qctl);
1205                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1206                 if (rc) {
1207                         OBD_FREE(oqctl, oqctl_len);
1208                         RETURN(rc);
1209                 }
1210                 /* If QIF_SPACE is not set, client should collect the
1211                  * space usage from OSSs by itself */
1212                 if ((cmd == Q_GETQUOTA || cmd == LUSTRE_Q_GETQUOTAPOOL) &&
1213                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1214                     !oqctl->qc_dqblk.dqb_curspace) {
1215                         struct obd_quotactl *oqctl_tmp;
1216                         int qctl_len = sizeof(*oqctl_tmp) + LOV_MAXPOOLNAME + 1;
1217
1218                         OBD_ALLOC(oqctl_tmp, qctl_len);
1219                         if (oqctl_tmp == NULL)
1220                                 GOTO(out, rc = -ENOMEM);
1221
1222                         if (cmd == LUSTRE_Q_GETQUOTAPOOL) {
1223                                 oqctl_tmp->qc_cmd = LUSTRE_Q_GETQUOTAPOOL;
1224                                 memcpy(oqctl_tmp->qc_poolname,
1225                                        qctl->qc_poolname,
1226                                        LOV_MAXPOOLNAME + 1);
1227                         } else {
1228                                 oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1229                         }
1230                         oqctl_tmp->qc_id = oqctl->qc_id;
1231                         oqctl_tmp->qc_type = oqctl->qc_type;
1232
1233                         /* collect space usage from OSTs */
1234                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1235                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1236                         if (!rc || rc == -EREMOTEIO) {
1237                                 oqctl->qc_dqblk.dqb_curspace =
1238                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1239                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1240                         }
1241
1242                         /* collect space & inode usage from MDTs */
1243                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1244                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1245                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1246                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1247                         if (!rc || rc == -EREMOTEIO) {
1248                                 oqctl->qc_dqblk.dqb_curspace +=
1249                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1250                                 oqctl->qc_dqblk.dqb_curinodes =
1251                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1252                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1253                         } else {
1254                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1255                         }
1256
1257                         OBD_FREE(oqctl_tmp, qctl_len);
1258                 }
1259 out:
1260                 QCTL_COPY(qctl, oqctl);
1261                 OBD_FREE(oqctl, oqctl_len);
1262         }
1263
1264         RETURN(rc);
1265 }
1266
1267 int ll_rmfid(struct file *file, void __user *arg)
1268 {
1269         const struct fid_array __user *ufa = arg;
1270         struct fid_array *lfa = NULL;
1271         size_t size;
1272         unsigned nr;
1273         int i, rc, *rcs = NULL;
1274         ENTRY;
1275
1276         if (!capable(CAP_DAC_READ_SEARCH) &&
1277             !(ll_i2sbi(file_inode(file))->ll_flags & LL_SBI_USER_FID2PATH))
1278                 RETURN(-EPERM);
1279         /* Only need to get the buflen */
1280         if (get_user(nr, &ufa->fa_nr))
1281                 RETURN(-EFAULT);
1282         /* DoS protection */
1283         if (nr > OBD_MAX_FIDS_IN_ARRAY)
1284                 RETURN(-E2BIG);
1285
1286         size = offsetof(struct fid_array, fa_fids[nr]);
1287         OBD_ALLOC(lfa, size);
1288         if (!lfa)
1289                 RETURN(-ENOMEM);
1290         OBD_ALLOC_PTR_ARRAY(rcs, nr);
1291         if (!rcs)
1292                 GOTO(free_lfa, rc = -ENOMEM);
1293
1294         if (copy_from_user(lfa, arg, size))
1295                 GOTO(free_rcs, rc = -EFAULT);
1296
1297         /* Call mdc_iocontrol */
1298         rc = md_rmfid(ll_i2mdexp(file_inode(file)), lfa, rcs, NULL);
1299         if (!rc) {
1300                 for (i = 0; i < nr; i++)
1301                         if (rcs[i])
1302                                 lfa->fa_fids[i].f_ver = rcs[i];
1303                 if (copy_to_user(arg, lfa, size))
1304                         rc = -EFAULT;
1305         }
1306
1307 free_rcs:
1308         OBD_FREE_PTR_ARRAY(rcs, nr);
1309 free_lfa:
1310         OBD_FREE(lfa, size);
1311
1312         RETURN(rc);
1313 }
1314
1315 /* This function tries to get a single name component,
1316  * to send to the server. No actual path traversal involved,
1317  * so we limit to NAME_MAX */
1318 static char *ll_getname(const char __user *filename)
1319 {
1320         int ret = 0, len;
1321         char *tmp;
1322
1323         OBD_ALLOC(tmp, NAME_MAX + 1);
1324
1325         if (!tmp)
1326                 return ERR_PTR(-ENOMEM);
1327
1328         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1329         if (len < 0)
1330                 ret = -ENOENT;
1331         else if (len > NAME_MAX)
1332                 ret = -ENAMETOOLONG;
1333
1334         if (ret) {
1335                 OBD_FREE(tmp, NAME_MAX + 1);
1336                 tmp =  ERR_PTR(ret);
1337         }
1338         return tmp;
1339 }
1340
1341 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1342
1343 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1344 {
1345         struct dentry *dentry = file_dentry(file);
1346         struct inode *inode = file_inode(file);
1347         struct ll_sb_info *sbi = ll_i2sbi(inode);
1348         struct obd_ioctl_data *data = NULL;
1349         int rc = 0;
1350         ENTRY;
1351
1352         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1353                PFID(ll_inode2fid(inode)), inode, cmd);
1354
1355         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1356         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1357                 return -ENOTTY;
1358
1359         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1360         switch (cmd) {
1361         case FS_IOC_GETFLAGS:
1362         case FS_IOC_SETFLAGS:
1363                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1364         case FSFILT_IOC_GETVERSION:
1365         case FS_IOC_GETVERSION:
1366                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1367         /* We need to special case any other ioctls we want to handle,
1368          * to send them to the MDS/OST as appropriate and to properly
1369          * network encode the arg field. */
1370         case FS_IOC_SETVERSION:
1371                 RETURN(-ENOTSUPP);
1372
1373         case LL_IOC_GET_MDTIDX: {
1374                 int mdtidx;
1375
1376                 mdtidx = ll_get_mdt_idx(inode);
1377                 if (mdtidx < 0)
1378                         RETURN(mdtidx);
1379
1380                 if (put_user((int)mdtidx, (int __user *)arg))
1381                         RETURN(-EFAULT);
1382
1383                 return 0;
1384         }
1385         case IOC_MDC_LOOKUP: {
1386                 int namelen, len = 0;
1387                 char *filename;
1388
1389                 rc = obd_ioctl_getdata(&data, &len, (void __user *)arg);
1390                 if (rc != 0)
1391                         RETURN(rc);
1392
1393                 filename = data->ioc_inlbuf1;
1394                 namelen = strlen(filename);
1395                 if (namelen < 1) {
1396                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1397                         GOTO(out_free, rc = -EINVAL);
1398                 }
1399
1400                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1401                 if (rc < 0) {
1402                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1403                                sbi->ll_fsname, namelen, filename, rc);
1404                         GOTO(out_free, rc);
1405                 }
1406 out_free:
1407                 OBD_FREE_LARGE(data, len);
1408                 return rc;
1409         }
1410         case LL_IOC_LMV_SETSTRIPE: {
1411                 struct lmv_user_md  *lum;
1412                 char *filename;
1413                 int namelen = 0;
1414                 int lumlen = 0;
1415                 umode_t mode;
1416                 bool createonly = false;
1417                 int len;
1418                 int rc;
1419
1420                 rc = obd_ioctl_getdata(&data, &len, (void __user *)arg);
1421                 if (rc)
1422                         RETURN(rc);
1423
1424                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1425                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1426                         GOTO(lmv_out_free, rc = -EINVAL);
1427
1428                 filename = data->ioc_inlbuf1;
1429                 namelen = data->ioc_inllen1;
1430
1431                 if (namelen < 1) {
1432                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1433                         GOTO(lmv_out_free, rc = -EINVAL);
1434                 }
1435                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1436                 lumlen = data->ioc_inllen2;
1437
1438                 if (!lmv_user_magic_supported(lum->lum_magic)) {
1439                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
1440                                lum->lum_magic, -EINVAL);
1441                         GOTO(lmv_out_free, rc = -EINVAL);
1442                 }
1443
1444                 if ((lum->lum_magic == LMV_USER_MAGIC ||
1445                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
1446                     lumlen < sizeof(*lum)) {
1447                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
1448                                filename, lumlen, lum->lum_magic, -EINVAL);
1449                         GOTO(lmv_out_free, rc = -EINVAL);
1450                 }
1451
1452                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
1453                     lumlen < sizeof(struct lmv_foreign_md)) {
1454                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1455                                filename, lum->lum_magic, lumlen, -EFAULT);
1456                         GOTO(lmv_out_free, rc = -EINVAL);
1457                 }
1458
1459                 mode = data->ioc_type;
1460                 createonly = data->ioc_obdo1.o_flags & OBD_FL_OBDMDEXISTS;
1461                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode,
1462                                          createonly);
1463 lmv_out_free:
1464                 OBD_FREE_LARGE(data, len);
1465                 RETURN(rc);
1466
1467         }
1468         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1469                 struct lmv_user_md        lum;
1470                 struct lmv_user_md __user *ulump =
1471                                         (struct lmv_user_md __user *)arg;
1472                 int                       rc;
1473
1474                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1475                         RETURN(-EFAULT);
1476
1477                 if (lum.lum_magic != LMV_USER_MAGIC)
1478                         RETURN(-EINVAL);
1479
1480                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1481
1482                 RETURN(rc);
1483         }
1484         case LL_IOC_LOV_SETSTRIPE_NEW:
1485         case LL_IOC_LOV_SETSTRIPE: {
1486                 struct lov_user_md_v3 *lumv3 = NULL;
1487                 struct lov_user_md_v1 lumv1;
1488                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1489                 struct lov_user_md_v1 __user *lumv1p =
1490                         (struct lov_user_md_v1 __user *)arg;
1491                 struct lov_user_md_v3 __user *lumv3p =
1492                         (struct lov_user_md_v3 __user *)arg;
1493                 int lum_size = 0;
1494
1495                 int set_default = 0;
1496
1497                 BUILD_BUG_ON(sizeof(struct lov_user_md_v3) <=
1498                              sizeof(struct lov_comp_md_v1));
1499                 BUILD_BUG_ON(sizeof(*lumv3) != sizeof(*lumv3p));
1500                 /* first try with v1 which is smaller than v3 */
1501                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1502                         RETURN(-EFAULT);
1503
1504                 if (is_root_inode(inode))
1505                         set_default = 1;
1506
1507                 switch (lumv1.lmm_magic) {
1508                 case LOV_USER_MAGIC_V3:
1509                 case LOV_USER_MAGIC_SPECIFIC:
1510                         lum_size = ll_lov_user_md_size(&lumv1);
1511                         if (lum_size < 0)
1512                                 RETURN(lum_size);
1513                         OBD_ALLOC(lumv3, lum_size);
1514                         if (!lumv3)
1515                                 RETURN(-ENOMEM);
1516                         if (copy_from_user(lumv3, lumv3p, lum_size))
1517                                 GOTO(out, rc = -EFAULT);
1518                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1519                         break;
1520                 case LOV_USER_MAGIC_V1:
1521                         break;
1522                 default:
1523                         GOTO(out, rc = -ENOTSUPP);
1524                 }
1525
1526                 /* in v1 and v3 cases lumv1 points to data */
1527                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1528 out:
1529                 if (lumv3)
1530                         OBD_FREE(lumv3, lum_size);
1531                 RETURN(rc);
1532         }
1533         case LL_IOC_LMV_GETSTRIPE: {
1534                 struct lmv_user_md __user *ulmv =
1535                                         (struct lmv_user_md __user *)arg;
1536                 struct lmv_user_md      lum;
1537                 struct ptlrpc_request   *request = NULL;
1538                 struct ptlrpc_request   *root_request = NULL;
1539                 union lmv_mds_md        *lmm = NULL;
1540                 int                     lmmsize;
1541                 u64                     valid = 0;
1542                 struct lmv_user_md      *tmp = NULL;
1543                 int                     mdt_index;
1544                 int                     lum_size;
1545                 int                     stripe_count;
1546                 int                     max_stripe_count;
1547                 int                     i;
1548                 int                     rc;
1549
1550                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1551                         RETURN(-EFAULT);
1552
1553                 max_stripe_count = lum.lum_stripe_count;
1554                 /* lum_magic will indicate which stripe the ioctl will like
1555                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1556                  * is for default LMV stripe */
1557                 if (lum.lum_magic == LMV_MAGIC_V1)
1558                         valid |= OBD_MD_MEA;
1559                 else if (lum.lum_magic == LMV_USER_MAGIC)
1560                         valid |= OBD_MD_DEFAULT_MEA;
1561                 else
1562                         RETURN(-EINVAL);
1563
1564                 rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmmsize,
1565                                               &request, &root_request, valid);
1566                 if (rc != 0)
1567                         GOTO(finish_req, rc);
1568
1569                 /* Get default LMV EA */
1570                 if (lum.lum_magic == LMV_USER_MAGIC) {
1571                         if (lmmsize > sizeof(*ulmv))
1572                                 GOTO(finish_req, rc = -EINVAL);
1573
1574                         if (copy_to_user(ulmv, lmm, lmmsize))
1575                                 GOTO(finish_req, rc = -EFAULT);
1576
1577                         GOTO(finish_req, rc);
1578                 }
1579
1580                 /* if foreign LMV case, fake stripes number */
1581                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1582                         struct lmv_foreign_md *lfm;
1583
1584                         lfm = (struct lmv_foreign_md *)lmm;
1585                         if (lfm->lfm_length < XATTR_SIZE_MAX -
1586                             offsetof(typeof(*lfm), lfm_value)) {
1587                                 __u32 size = lfm->lfm_length +
1588                                              offsetof(typeof(*lfm), lfm_value);
1589
1590                                 stripe_count = lmv_foreign_to_md_stripes(size);
1591                         } else {
1592                                 CERROR("invalid %d foreign size returned\n",
1593                                             lfm->lfm_length);
1594                                 return -EINVAL;
1595                         }
1596                 } else {
1597                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
1598                 }
1599                 if (max_stripe_count < stripe_count) {
1600                         lum.lum_stripe_count = stripe_count;
1601                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1602                                 GOTO(finish_req, rc = -EFAULT);
1603                         GOTO(finish_req, rc = -E2BIG);
1604                 }
1605
1606                 /* enough room on user side and foreign case */
1607                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1608                         struct lmv_foreign_md *lfm;
1609                         __u32 size;
1610
1611                         lfm = (struct lmv_foreign_md *)lmm;
1612                         size = lfm->lfm_length +
1613                                offsetof(struct lmv_foreign_md, lfm_value);
1614                         if (copy_to_user(ulmv, lfm, size))
1615                                 GOTO(finish_req, rc = -EFAULT);
1616                         GOTO(finish_req, rc);
1617                 }
1618
1619                 lum_size = lmv_user_md_size(stripe_count,
1620                                             LMV_USER_MAGIC_SPECIFIC);
1621                 OBD_ALLOC(tmp, lum_size);
1622                 if (tmp == NULL)
1623                         GOTO(finish_req, rc = -ENOMEM);
1624
1625                 mdt_index = ll_get_mdt_idx(inode);
1626                 if (mdt_index < 0)
1627                         GOTO(out_tmp, rc = -ENOMEM);
1628
1629                 tmp->lum_magic = LMV_MAGIC_V1;
1630                 tmp->lum_stripe_count = 0;
1631                 tmp->lum_stripe_offset = mdt_index;
1632                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1633                 for (i = 0; i < stripe_count; i++) {
1634                         struct lu_fid   fid;
1635
1636                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1637                         if (fid_is_sane(&fid)) {
1638                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1639                                 if (mdt_index < 0)
1640                                         GOTO(out_tmp, rc = mdt_index);
1641
1642                                 tmp->lum_objects[i].lum_mds = mdt_index;
1643                                 tmp->lum_objects[i].lum_fid = fid;
1644                         }
1645
1646                         tmp->lum_stripe_count++;
1647                 }
1648
1649                 if (copy_to_user(ulmv, tmp, lum_size))
1650                         GOTO(out_tmp, rc = -EFAULT);
1651 out_tmp:
1652                 OBD_FREE(tmp, lum_size);
1653 finish_req:
1654                 ptlrpc_req_finished(request);
1655                 ptlrpc_req_finished(root_request);
1656                 return rc;
1657         }
1658
1659         case LL_IOC_UNLOCK_FOREIGN:
1660                 /* if not a foreign symlink do nothing */
1661                 if (ll_foreign_is_removable(dentry, true)) {
1662                         CDEBUG(D_INFO,
1663                                "prevent rmdir of non-foreign dir ("DFID")\n",
1664                                PFID(ll_inode2fid(inode)));
1665                         RETURN(-EOPNOTSUPP);
1666                 }
1667                 RETURN(0);
1668
1669         case LL_IOC_REMOVE_ENTRY: {
1670                 char            *filename = NULL;
1671                 int              namelen = 0;
1672                 int              rc;
1673
1674                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1675                  * unsupported server, which might crash the server(LU-2730),
1676                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1677                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1678                  * server will support REINT_RMENTRY XXX*/
1679                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1680                         RETURN(-ENOTSUPP);
1681
1682                 filename = ll_getname((const char __user *)arg);
1683                 if (IS_ERR(filename))
1684                         RETURN(PTR_ERR(filename));
1685
1686                 namelen = strlen(filename);
1687                 if (namelen < 1)
1688                         GOTO(out_rmdir, rc = -EINVAL);
1689
1690                 rc = ll_rmdir_entry(inode, filename, namelen);
1691 out_rmdir:
1692                 if (filename)
1693                         ll_putname(filename);
1694                 RETURN(rc);
1695         }
1696         case LL_IOC_RMFID:
1697                 RETURN(ll_rmfid(file, (void __user *)arg));
1698         case LL_IOC_LOV_SWAP_LAYOUTS:
1699                 RETURN(-EPERM);
1700         case IOC_OBD_STATFS:
1701                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1702         case LL_IOC_LOV_GETSTRIPE:
1703         case LL_IOC_LOV_GETSTRIPE_NEW:
1704         case LL_IOC_MDC_GETINFO_V1:
1705         case LL_IOC_MDC_GETINFO_V2:
1706         case IOC_MDC_GETFILEINFO_V1:
1707         case IOC_MDC_GETFILEINFO_V2:
1708         case IOC_MDC_GETFILESTRIPE: {
1709                 struct ptlrpc_request *request = NULL;
1710                 struct ptlrpc_request *root_request = NULL;
1711                 struct lov_user_md __user *lump;
1712                 struct lov_mds_md *lmm = NULL;
1713                 struct mdt_body *body;
1714                 char *filename = NULL;
1715                 lstat_t __user *statp = NULL;
1716                 lstatx_t __user *stxp = NULL;
1717                 __u64 __user *flagsp = NULL;
1718                 __u32 __user *lmmsizep = NULL;
1719                 struct lu_fid __user *fidp = NULL;
1720                 int lmmsize;
1721
1722                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
1723                     cmd == IOC_MDC_GETFILEINFO_V2 ||
1724                     cmd == IOC_MDC_GETFILESTRIPE) {
1725                         filename = ll_getname((const char __user *)arg);
1726                         if (IS_ERR(filename))
1727                                 RETURN(PTR_ERR(filename));
1728
1729                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1730                                                       &lmmsize, &request);
1731                 } else {
1732                         rc = ll_dir_getstripe_default(inode, (void **)&lmm,
1733                                                       &lmmsize, &request,
1734                                                       &root_request, 0);
1735                 }
1736
1737                 if (request) {
1738                         body = req_capsule_server_get(&request->rq_pill,
1739                                                       &RMF_MDT_BODY);
1740                         LASSERT(body != NULL);
1741                 } else {
1742                         GOTO(out_req, rc);
1743                 }
1744
1745                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO_V1 ||
1746                                        cmd == LL_IOC_MDC_GETINFO_V1 ||
1747                                        cmd == IOC_MDC_GETFILEINFO_V2 ||
1748                                        cmd == LL_IOC_MDC_GETINFO_V2)) {
1749                         lmmsize = 0;
1750                         rc = 0;
1751                 }
1752
1753                 if (rc < 0)
1754                         GOTO(out_req, rc);
1755
1756                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1757                     cmd == LL_IOC_LOV_GETSTRIPE ||
1758                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1759                         lump = (struct lov_user_md __user *)arg;
1760                 } else if (cmd == IOC_MDC_GETFILEINFO_V1 ||
1761                            cmd == LL_IOC_MDC_GETINFO_V1){
1762                         struct lov_user_mds_data_v1 __user *lmdp;
1763
1764                         lmdp = (struct lov_user_mds_data_v1 __user *)arg;
1765                         statp = &lmdp->lmd_st;
1766                         lump = &lmdp->lmd_lmm;
1767                 } else {
1768                         struct lov_user_mds_data __user *lmdp;
1769
1770                         lmdp = (struct lov_user_mds_data __user *)arg;
1771                         fidp = &lmdp->lmd_fid;
1772                         stxp = &lmdp->lmd_stx;
1773                         flagsp = &lmdp->lmd_flags;
1774                         lmmsizep = &lmdp->lmd_lmmsize;
1775                         lump = &lmdp->lmd_lmm;
1776                 }
1777
1778                 if (lmmsize == 0) {
1779                         /* If the file has no striping then zero out *lump so
1780                          * that the caller isn't confused by garbage. */
1781                         if (clear_user(lump, sizeof(*lump)))
1782                                 GOTO(out_req, rc = -EFAULT);
1783                 } else if (copy_to_user(lump, lmm, lmmsize)) {
1784                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1785                                 GOTO(out_req, rc = -EFAULT);
1786                         rc = -EOVERFLOW;
1787                 }
1788
1789                 if (cmd == IOC_MDC_GETFILEINFO_V1 ||
1790                     cmd == LL_IOC_MDC_GETINFO_V1) {
1791                         lstat_t st = { 0 };
1792
1793                         st.st_dev       = inode->i_sb->s_dev;
1794                         st.st_mode      = body->mbo_mode;
1795                         st.st_nlink     = body->mbo_nlink;
1796                         st.st_uid       = body->mbo_uid;
1797                         st.st_gid       = body->mbo_gid;
1798                         st.st_rdev      = body->mbo_rdev;
1799                         st.st_size      = body->mbo_size;
1800                         st.st_blksize   = PAGE_SIZE;
1801                         st.st_blocks    = body->mbo_blocks;
1802                         st.st_atime     = body->mbo_atime;
1803                         st.st_mtime     = body->mbo_mtime;
1804                         st.st_ctime     = body->mbo_ctime;
1805                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1806                                                 sbi->ll_flags &
1807                                                 LL_SBI_32BIT_API);
1808
1809                         if (copy_to_user(statp, &st, sizeof(st)))
1810                                 GOTO(out_req, rc = -EFAULT);
1811                 } else if (cmd == IOC_MDC_GETFILEINFO_V2 ||
1812                            cmd == LL_IOC_MDC_GETINFO_V2) {
1813                         lstatx_t stx = { 0 };
1814                         __u64 valid = body->mbo_valid;
1815
1816                         stx.stx_blksize = PAGE_SIZE;
1817                         stx.stx_nlink = body->mbo_nlink;
1818                         stx.stx_uid = body->mbo_uid;
1819                         stx.stx_gid = body->mbo_gid;
1820                         stx.stx_mode = body->mbo_mode;
1821                         stx.stx_ino = cl_fid_build_ino(&body->mbo_fid1,
1822                                                        sbi->ll_flags &
1823                                                        LL_SBI_32BIT_API);
1824                         stx.stx_size = body->mbo_size;
1825                         stx.stx_blocks = body->mbo_blocks;
1826                         stx.stx_atime.tv_sec = body->mbo_atime;
1827                         stx.stx_ctime.tv_sec = body->mbo_ctime;
1828                         stx.stx_mtime.tv_sec = body->mbo_mtime;
1829                         stx.stx_btime.tv_sec = body->mbo_btime;
1830                         stx.stx_rdev_major = MAJOR(body->mbo_rdev);
1831                         stx.stx_rdev_minor = MINOR(body->mbo_rdev);
1832                         stx.stx_dev_major = MAJOR(inode->i_sb->s_dev);
1833                         stx.stx_dev_minor = MINOR(inode->i_sb->s_dev);
1834                         stx.stx_mask |= STATX_BASIC_STATS | STATX_BTIME;
1835
1836                         /*
1837                          * For a striped directory, the size and blocks returned
1838                          * from MDT is not correct.
1839                          * The size and blocks are aggregated by client across
1840                          * all stripes.
1841                          * Thus for a striped directory, do not return the valid
1842                          * FLSIZE and FLBLOCKS flags to the caller.
1843                          * However, this whould be better decided by the MDS
1844                          * instead of the client.
1845                          */
1846                         if (cmd == LL_IOC_MDC_GETINFO_V2 &&
1847                             ll_i2info(inode)->lli_lsm_md != NULL)
1848                                 valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
1849
1850                         if (flagsp && copy_to_user(flagsp, &valid,
1851                                                    sizeof(*flagsp)))
1852                                 GOTO(out_req, rc = -EFAULT);
1853
1854                         if (fidp && copy_to_user(fidp, &body->mbo_fid1,
1855                                                  sizeof(*fidp)))
1856                                 GOTO(out_req, rc = -EFAULT);
1857
1858                         if (!(valid & OBD_MD_FLSIZE))
1859                                 stx.stx_mask &= ~STATX_SIZE;
1860                         if (!(valid & OBD_MD_FLBLOCKS))
1861                                 stx.stx_mask &= ~STATX_BLOCKS;
1862
1863                         if (stxp && copy_to_user(stxp, &stx, sizeof(stx)))
1864                                 GOTO(out_req, rc = -EFAULT);
1865
1866                         if (lmmsizep && copy_to_user(lmmsizep, &lmmsize,
1867                                                      sizeof(*lmmsizep)))
1868                                 GOTO(out_req, rc = -EFAULT);
1869                 }
1870
1871                 EXIT;
1872 out_req:
1873                 ptlrpc_req_finished(request);
1874                 ptlrpc_req_finished(root_request);
1875                 if (filename)
1876                         ll_putname(filename);
1877                 return rc;
1878         }
1879         case OBD_IOC_QUOTACTL: {
1880                 struct if_quotactl *qctl;
1881                 int qctl_len = sizeof(*qctl) + LOV_MAXPOOLNAME + 1;
1882
1883                 OBD_ALLOC(qctl, qctl_len);
1884                 if (!qctl)
1885                         RETURN(-ENOMEM);
1886
1887                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1888                         GOTO(out_quotactl, rc = -EFAULT);
1889
1890                 if (LUSTRE_Q_CMD_IS_POOL(qctl->qc_cmd)) {
1891                         char __user *from = (char __user *)arg +
1892                                         offsetof(typeof(*qctl), qc_poolname);
1893                         if (copy_from_user(qctl->qc_poolname, from,
1894                                            LOV_MAXPOOLNAME + 1))
1895                                 GOTO(out_quotactl, rc = -EFAULT);
1896                 }
1897
1898                 rc = quotactl_ioctl(sbi, qctl);
1899                 if (rc == 0 &&
1900                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1901                         rc = -EFAULT;
1902
1903 out_quotactl:
1904                 OBD_FREE(qctl, qctl_len);
1905                 RETURN(rc);
1906         }
1907         case OBD_IOC_GETNAME_OLD:
1908                 /* fall through */
1909         case OBD_IOC_GETDTNAME:
1910                 /* fall through */
1911         case OBD_IOC_GETMDNAME:
1912                 RETURN(ll_get_obd_name(inode, cmd, arg));
1913         case LL_IOC_FLUSHCTX:
1914                 RETURN(ll_flush_ctx(inode));
1915         case LL_IOC_GETOBDCOUNT: {
1916                 u32 count, vallen;
1917                 struct obd_export *exp;
1918
1919                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1920                         RETURN(-EFAULT);
1921
1922                 /* get ost count when count is zero, get mdt count otherwise */
1923                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1924                 vallen = sizeof(count);
1925                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1926                                   KEY_TGT_COUNT, &vallen, &count);
1927                 if (rc) {
1928                         CERROR("get target count failed: %d\n", rc);
1929                         RETURN(rc);
1930                 }
1931
1932                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1933                         RETURN(-EFAULT);
1934
1935                 RETURN(0);
1936         }
1937         case LL_IOC_PATH2FID:
1938                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1939                                      sizeof(struct lu_fid)))
1940                         RETURN(-EFAULT);
1941                 RETURN(0);
1942         case LL_IOC_GET_CONNECT_FLAGS: {
1943                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1944                                      (void __user *)arg));
1945         }
1946         case OBD_IOC_FID2PATH:
1947                 RETURN(ll_fid2path(inode, (void __user *)arg));
1948         case LL_IOC_GETPARENT:
1949                 RETURN(ll_getparent(file, (void __user *)arg));
1950         case LL_IOC_FID2MDTIDX: {
1951                 struct obd_export *exp = ll_i2mdexp(inode);
1952                 struct lu_fid     fid;
1953                 __u32             index;
1954
1955                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1956                                    sizeof(fid)))
1957                         RETURN(-EFAULT);
1958
1959                 /* Call mdc_iocontrol */
1960                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1961                                    (__u32 __user *)&index);
1962                 if (rc != 0)
1963                         RETURN(rc);
1964
1965                 RETURN(index);
1966         }
1967         case LL_IOC_HSM_REQUEST: {
1968                 struct hsm_user_request *hur;
1969                 ssize_t                  totalsize;
1970
1971                 OBD_ALLOC_PTR(hur);
1972                 if (hur == NULL)
1973                         RETURN(-ENOMEM);
1974
1975                 /* We don't know the true size yet; copy the fixed-size part */
1976                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1977                         OBD_FREE_PTR(hur);
1978                         RETURN(-EFAULT);
1979                 }
1980
1981                 /* Compute the whole struct size */
1982                 totalsize = hur_len(hur);
1983                 OBD_FREE_PTR(hur);
1984                 if (totalsize < 0)
1985                         RETURN(-E2BIG);
1986
1987                 /* Final size will be more than double totalsize */
1988                 if (totalsize >= MDS_MAXREQSIZE / 3)
1989                         RETURN(-E2BIG);
1990
1991                 OBD_ALLOC_LARGE(hur, totalsize);
1992                 if (hur == NULL)
1993                         RETURN(-ENOMEM);
1994
1995                 /* Copy the whole struct */
1996                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1997                         GOTO(out_hur, rc = -EFAULT);
1998
1999                 if (hur->hur_request.hr_action == HUA_RELEASE) {
2000                         const struct lu_fid *fid;
2001                         struct inode *f;
2002                         int i;
2003
2004                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
2005                                 fid = &hur->hur_user_item[i].hui_fid;
2006                                 f = search_inode_for_lustre(inode->i_sb, fid);
2007                                 if (IS_ERR(f)) {
2008                                         rc = PTR_ERR(f);
2009                                         break;
2010                                 }
2011
2012                                 rc = ll_hsm_release(f);
2013                                 iput(f);
2014                                 if (rc != 0)
2015                                         break;
2016                         }
2017                 } else {
2018                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
2019                                            hur, NULL);
2020                 }
2021
2022 out_hur:
2023                 OBD_FREE_LARGE(hur, totalsize);
2024
2025                 RETURN(rc);
2026         }
2027         case LL_IOC_HSM_PROGRESS: {
2028                 struct hsm_progress_kernel      hpk;
2029                 struct hsm_progress             hp;
2030
2031                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
2032                         RETURN(-EFAULT);
2033
2034                 hpk.hpk_fid = hp.hp_fid;
2035                 hpk.hpk_cookie = hp.hp_cookie;
2036                 hpk.hpk_extent = hp.hp_extent;
2037                 hpk.hpk_flags = hp.hp_flags;
2038                 hpk.hpk_errval = hp.hp_errval;
2039                 hpk.hpk_data_version = 0;
2040
2041                 /* File may not exist in Lustre; all progress
2042                  * reported to Lustre root */
2043                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
2044                                    NULL);
2045                 RETURN(rc);
2046         }
2047         case LL_IOC_HSM_CT_START:
2048                 if (!capable(CAP_SYS_ADMIN))
2049                         RETURN(-EPERM);
2050
2051                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
2052                                        (struct lustre_kernelcomm __user *)arg);
2053                 RETURN(rc);
2054
2055         case LL_IOC_HSM_COPY_START: {
2056                 struct hsm_copy *copy;
2057                 int              rc;
2058
2059                 OBD_ALLOC_PTR(copy);
2060                 if (copy == NULL)
2061                         RETURN(-ENOMEM);
2062                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2063                         OBD_FREE_PTR(copy);
2064                         RETURN(-EFAULT);
2065                 }
2066
2067                 rc = ll_ioc_copy_start(inode->i_sb, copy);
2068                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2069                         rc = -EFAULT;
2070
2071                 OBD_FREE_PTR(copy);
2072                 RETURN(rc);
2073         }
2074         case LL_IOC_HSM_COPY_END: {
2075                 struct hsm_copy *copy;
2076                 int              rc;
2077
2078                 OBD_ALLOC_PTR(copy);
2079                 if (copy == NULL)
2080                         RETURN(-ENOMEM);
2081                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2082                         OBD_FREE_PTR(copy);
2083                         RETURN(-EFAULT);
2084                 }
2085
2086                 rc = ll_ioc_copy_end(inode->i_sb, copy);
2087                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2088                         rc = -EFAULT;
2089
2090                 OBD_FREE_PTR(copy);
2091                 RETURN(rc);
2092         }
2093         case LL_IOC_MIGRATE: {
2094                 struct lmv_user_md *lum;
2095                 int len;
2096                 char *filename;
2097                 int namelen = 0;
2098                 int rc;
2099
2100                 rc = obd_ioctl_getdata(&data, &len, (void __user *)arg);
2101                 if (rc)
2102                         RETURN(rc);
2103
2104                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2105                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2106                         GOTO(migrate_free, rc = -EINVAL);
2107
2108                 filename = data->ioc_inlbuf1;
2109                 namelen = data->ioc_inllen1;
2110
2111                 if (namelen < 1 || namelen != strlen(filename) + 1) {
2112                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2113                         GOTO(migrate_free, rc = -EINVAL);
2114                 }
2115
2116                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2117                 if (lum->lum_magic != LMV_USER_MAGIC &&
2118                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
2119                         rc = -EINVAL;
2120                         CERROR("%s: wrong lum magic %x: rc = %d\n",
2121                                filename, lum->lum_magic, rc);
2122                         GOTO(migrate_free, rc);
2123                 }
2124
2125                 rc = ll_migrate(inode, file, lum, filename);
2126 migrate_free:
2127                 OBD_FREE_LARGE(data, len);
2128
2129                 RETURN(rc);
2130         }
2131         case FS_IOC_FSGETXATTR:
2132                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
2133         case FS_IOC_FSSETXATTR:
2134                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
2135         case LL_IOC_PROJECT:
2136                 RETURN(ll_ioctl_project(file, cmd, arg));
2137         case LL_IOC_PCC_DETACH_BY_FID: {
2138                 struct lu_pcc_detach_fid *detach;
2139                 struct lu_fid *fid;
2140                 struct inode *inode2;
2141                 unsigned long ino;
2142
2143                 OBD_ALLOC_PTR(detach);
2144                 if (detach == NULL)
2145                         RETURN(-ENOMEM);
2146
2147                 if (copy_from_user(detach,
2148                                    (const struct lu_pcc_detach_fid __user *)arg,
2149                                    sizeof(*detach)))
2150                         GOTO(out_detach, rc = -EFAULT);
2151
2152                 fid = &detach->pccd_fid;
2153                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2154                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2155                 if (inode2 == NULL)
2156                         /* Target inode is not in inode cache, and PCC file
2157                          * has aleady released, return immdiately.
2158                          */
2159                         GOTO(out_detach, rc = 0);
2160
2161                 if (!S_ISREG(inode2->i_mode))
2162                         GOTO(out_iput, rc = -EINVAL);
2163
2164                 if (!inode_owner_or_capable(inode2))
2165                         GOTO(out_iput, rc = -EPERM);
2166
2167                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2168 out_iput:
2169                 iput(inode2);
2170 out_detach:
2171                 OBD_FREE_PTR(detach);
2172                 RETURN(rc);
2173         }
2174 #ifdef HAVE_LUSTRE_CRYPTO
2175         case LL_IOC_SET_ENCRYPTION_POLICY:
2176                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2177                         return -EOPNOTSUPP;
2178                 return llcrypt_ioctl_set_policy(file, (const void __user *)arg);
2179         case LL_IOC_GET_ENCRYPTION_POLICY_EX:
2180                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2181                         return -EOPNOTSUPP;
2182                 return llcrypt_ioctl_get_policy_ex(file, (void __user *)arg);
2183         case LL_IOC_ADD_ENCRYPTION_KEY:
2184                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2185                         return -EOPNOTSUPP;
2186                 return llcrypt_ioctl_add_key(file, (void __user *)arg);
2187         case LL_IOC_REMOVE_ENCRYPTION_KEY:
2188                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2189                         return -EOPNOTSUPP;
2190                 return llcrypt_ioctl_remove_key(file, (void __user *)arg);
2191         case LL_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
2192                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2193                         return -EOPNOTSUPP;
2194                 return llcrypt_ioctl_remove_key_all_users(file,
2195                                                           (void __user *)arg);
2196         case LL_IOC_GET_ENCRYPTION_KEY_STATUS:
2197                 if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
2198                         return -EOPNOTSUPP;
2199                 return llcrypt_ioctl_get_key_status(file, (void __user *)arg);
2200 #endif
2201         default:
2202                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
2203                                      (void __user *)arg));
2204         }
2205 }
2206
2207 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2208 {
2209         struct inode *inode = file->f_mapping->host;
2210         struct ll_file_data *fd = file->private_data;
2211         struct ll_sb_info *sbi = ll_i2sbi(inode);
2212         int api32 = ll_need_32bit_api(sbi);
2213         loff_t ret = -EINVAL;
2214         ENTRY;
2215
2216         inode_lock(inode);
2217         switch (origin) {
2218         case SEEK_SET:
2219                 break;
2220         case SEEK_CUR:
2221                 offset += file->f_pos;
2222                 break;
2223         case SEEK_END:
2224                 if (offset > 0)
2225                         GOTO(out, ret);
2226                 if (api32)
2227                         offset += LL_DIR_END_OFF_32BIT;
2228                 else
2229                         offset += LL_DIR_END_OFF;
2230                 break;
2231         default:
2232                 GOTO(out, ret);
2233         }
2234
2235         if (offset >= 0 &&
2236             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2237              (!api32 && offset <= LL_DIR_END_OFF))) {
2238                 if (offset != file->f_pos) {
2239                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2240                             (!api32 && offset == LL_DIR_END_OFF))
2241                                 fd->lfd_pos = MDS_DIR_END_OFF;
2242                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
2243                                 fd->lfd_pos = offset << 32;
2244                         else
2245                                 fd->lfd_pos = offset;
2246                         file->f_pos = offset;
2247                         file->f_version = 0;
2248                 }
2249                 ret = offset;
2250         }
2251         GOTO(out, ret);
2252
2253 out:
2254         inode_unlock(inode);
2255         return ret;
2256 }
2257
2258 static int ll_dir_open(struct inode *inode, struct file *file)
2259 {
2260         ENTRY;
2261         RETURN(ll_file_open(inode, file));
2262 }
2263
2264 static int ll_dir_release(struct inode *inode, struct file *file)
2265 {
2266         ENTRY;
2267         RETURN(ll_file_release(inode, file));
2268 }
2269
2270 const struct file_operations ll_dir_operations = {
2271         .llseek         = ll_dir_seek,
2272         .open           = ll_dir_open,
2273         .release        = ll_dir_release,
2274         .read           = generic_read_dir,
2275 #ifdef HAVE_DIR_CONTEXT
2276         .iterate_shared = ll_iterate,
2277 #else
2278         .readdir        = ll_readdir,
2279 #endif
2280         .unlocked_ioctl = ll_dir_ioctl,
2281         .fsync          = ll_fsync,
2282 };