lustre/llite/dir.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/llite/dir.c
  33  *
  34  * Directory code for lustre client.
  35  */
  36
  37 #include <linux/fs.h>
  38 #include <linux/pagemap.h>
  39 #include <linux/mm.h>
  40 #include <linux/version.h>
  41 #include <linux/security.h>
  42 #include <linux/user_namespace.h>
  43 #ifdef HAVE_UIDGID_HEADER
  44 # include <linux/uidgid.h>
  45 #endif
  46 #include <linux/uaccess.h>
  47 #include <linux/buffer_head.h>   // for wait_on_buffer
  48 #include <linux/pagevec.h>
  49
  50 #define DEBUG_SUBSYSTEM S_LLITE
  51
  52 #include <obd_support.h>
  53 #include <obd_class.h>
  54 #include <uapi/linux/lustre/lustre_ioctl.h>
  55 #include <lustre_lib.h>
  56 #include <lustre_dlm.h>
  57 #include <lustre_fid.h>
  58 #include <lustre_kernelcomm.h>
  59 #include <lustre_swab.h>
  60
  61 #include "llite_internal.h"
  62
  63 /*
  64  * (new) readdir implementation overview.
  65  *
  66  * Original lustre readdir implementation cached exact copy of raw directory
  67  * pages on the client. These pages were indexed in client page cache by
  68  * logical offset in the directory file. This design, while very simple and
  69  * intuitive had some inherent problems:
  70  *
  71  *     . it implies that byte offset to the directory entry serves as a
  72  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  73  *     ext3/htree directory entries may move due to splits, and more
  74  *     importantly,
  75  *
  76  *     . it is incompatible with the design of split directories for cmd3,
  77  *     that assumes that names are distributed across nodes based on their
  78  *     hash, and so readdir should be done in hash order.
  79  *
  80  * New readdir implementation does readdir in hash order, and uses hash of a
  81  * file name as a telldir/seekdir cookie. This led to number of complications:
  82  *
  83  *     . hash is not unique, so it cannot be used to index cached directory
  84  *     pages on the client (note, that it requires a whole pageful of hash
  85  *     collided entries to cause two pages to have identical hashes);
  86  *
  87  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  88  *     entry cookie. ext3/htree has the same problem and lustre implementation
  89  *     mimics their solution: seekdir(hash) positions directory at the first
  90  *     entry with the given hash.
  91  *
  92  * Client side.
  93  *
  94  * 0. caching
  95  *
  96  * Client caches directory pages using hash of the first entry as an index. As
  97  * noted above hash is not unique, so this solution doesn't work as is:
  98  * special processing is needed for "page hash chains" (i.e., sequences of
  99  * pages filled with entries all having the same hash value).
 100  *
 101  * First, such chains have to be detected. To this end, server returns to the
 102  * client the hash of the first entry on the page next to one returned. When
 103  * client detects that this hash is the same as hash of the first entry on the
 104  * returned page, page hash collision has to be handled. Pages in the
 105  * hash chain, except first one, are termed "overflow pages".
 106  *
 107  * Solution to index uniqueness problem is to not cache overflow
 108  * pages. Instead, when page hash collision is detected, all overflow pages
 109  * from emerging chain are immediately requested from the server and placed in
 110  * a special data structure (struct ll_dir_chain). This data structure is used
 111  * by ll_readdir() to process entries from overflow pages. When readdir
 112  * invocation finishes, overflow pages are discarded. If page hash collision
 113  * chain weren't completely processed, next call to readdir will again detect
 114  * page hash collision, again read overflow pages in, process next portion of
 115  * entries and again discard the pages. This is not as wasteful as it looks,
 116  * because, given reasonable hash, page hash collisions are extremely rare.
 117  *
 118  * 1. directory positioning
 119  *
 120  * When seekdir(hash) is called, original
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  *
 128  *
 129  * Server.
 130  *
 131  * identification of and access to overflow pages
 132  *
 133  * page format
 134  *
 135  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 136  * a header lu_dirpage which describes the start/end hash, and whether this
 137  * page is empty (contains no dir entry) or hash collide with next page.
 138  * After client receives reply, several pages will be integrated into dir page
 139  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 140  * lu_dirpage for this integrated page will be adjusted. See
 141  * mdc_adjust_dirpages().
 142  *
 143  */
 144 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 145                              __u64 offset, struct ll_dir_chain *chain)
 146 {
 147         struct md_callback      cb_op;
 148         struct page             *page;
 149         int                     rc;
 150
 151         cb_op.md_blocking_ast = ll_md_blocking_ast;
 152         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 153         if (rc != 0)
 154                 return ERR_PTR(rc);
 155
 156         return page;
 157 }
 158
 159 void ll_release_page(struct inode *inode, struct page *page,
 160                      bool remove)
 161 {
 162         kunmap(page);
 163
 164         /* Always remove the page for striped dir, because the page is
 165          * built from temporarily in LMV layer */
 166         if (inode != NULL && S_ISDIR(inode->i_mode) &&
 167             ll_i2info(inode)->lli_lsm_md != NULL) {
 168                 __free_page(page);
 169                 return;
 170         }
 171
 172         if (remove) {
 173                 lock_page(page);
 174                 if (likely(page->mapping != NULL))
 175                         truncate_complete_page(page->mapping, page);
 176                 unlock_page(page);
 177         }
 178         put_page(page);
 179 }
 180
 181 /**
 182  * return IF_* type for given lu_dirent entry.
 183  * IF_* flag shld be converted to particular OS file type in
 184  * platform llite module.
 185  */
 186 static u16 ll_dirent_type_get(struct lu_dirent *ent)
 187 {
 188         u16 type = 0;
 189         struct luda_type *lt;
 190         int len = 0;
 191
 192         if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
 193                 const unsigned align = sizeof(struct luda_type) - 1;
 194
 195                 len = le16_to_cpu(ent->lde_namelen);
 196                 len = (len + align) & ~align;
 197                 lt = (void *)ent->lde_name + len;
 198                 type = IFTODT(le16_to_cpu(lt->lt_type));
 199         }
 200
 201         return type;
 202 }
 203
 204 #ifdef HAVE_DIR_CONTEXT
 205 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 206                 struct dir_context *ctx)
 207 {
 208 #else
 209 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 210                 void *cookie, filldir_t filldir)
 211 {
 212 #endif
 213         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 214         __u64                 pos        = *ppos;
 215         bool                  is_api32 = ll_need_32bit_api(sbi);
 216         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 217         struct page          *page;
 218         struct ll_dir_chain   chain;
 219         bool                  done = false;
 220         int                   rc = 0;
 221         ENTRY;
 222
 223         ll_dir_chain_init(&chain);
 224
 225         page = ll_get_dir_page(inode, op_data, pos, &chain);
 226
 227         while (rc == 0 && !done) {
 228                 struct lu_dirpage *dp;
 229                 struct lu_dirent  *ent;
 230                 __u64 hash;
 231                 __u64 next;
 232
 233                 if (IS_ERR(page)) {
 234                         rc = PTR_ERR(page);
 235                         break;
 236                 }
 237
 238                 hash = MDS_DIR_END_OFF;
 239                 dp = page_address(page);
 240                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 241                      ent = lu_dirent_next(ent)) {
 242                         __u16          type;
 243                         int            namelen;
 244                         struct lu_fid  fid;
 245                         __u64          lhash;
 246                         __u64          ino;
 247
 248                         hash = le64_to_cpu(ent->lde_hash);
 249                         if (hash < pos) /* Skip until we find target hash */
 250                                 continue;
 251
 252                         namelen = le16_to_cpu(ent->lde_namelen);
 253                         if (namelen == 0) /* Skip dummy record */
 254                                 continue;
 255
 256                         if (is_api32 && is_hash64)
 257                                 lhash = hash >> 32;
 258                         else
 259                                 lhash = hash;
 260                         fid_le_to_cpu(&fid, &ent->lde_fid);
 261                         ino = cl_fid_build_ino(&fid, is_api32);
 262                         type = ll_dirent_type_get(ent);
 263                         /* For ll_nfs_get_name_filldir(), it will try to access
 264                          * 'ent' through 'lde_name', so the parameter 'name'
 265                          * for 'filldir()' must be part of the 'ent'. */
 266 #ifdef HAVE_DIR_CONTEXT
 267                         ctx->pos = lhash;
 268                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 269                                          type);
 270 #else
 271                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 272                                        ino, type);
 273 #endif
 274                 }
 275
 276                 if (done) {
 277                         pos = hash;
 278                         ll_release_page(inode, page, false);
 279                         break;
 280                 }
 281
 282                 next = le64_to_cpu(dp->ldp_hash_end);
 283                 pos = next;
 284                 if (pos == MDS_DIR_END_OFF) {
 285                         /*
 286                          * End of directory reached.
 287                          */
 288                         done = 1;
 289                         ll_release_page(inode, page, false);
 290                 } else {
 291                         /*
 292                          * Normal case: continue to the next
 293                          * page.
 294                          */
 295                         ll_release_page(inode, page,
 296                                         le32_to_cpu(dp->ldp_flags) &
 297                                         LDF_COLLIDE);
 298                         next = pos;
 299                         page = ll_get_dir_page(inode, op_data, pos,
 300                                                &chain);
 301                 }
 302         }
 303 #ifdef HAVE_DIR_CONTEXT
 304         ctx->pos = pos;
 305 #else
 306         *ppos = pos;
 307 #endif
 308         ll_dir_chain_fini(&chain);
 309         RETURN(rc);
 310 }
 311
 312 #ifdef HAVE_DIR_CONTEXT
 313 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 314 #else
 315 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 316 #endif
 317 {
 318         struct inode            *inode  = file_inode(filp);
 319         struct ll_file_data     *lfd    = LUSTRE_FPRIVATE(filp);
 320         struct ll_sb_info       *sbi    = ll_i2sbi(inode);
 321         int                     hash64  = sbi->ll_flags & LL_SBI_64BIT_HASH;
 322         int                     api32   = ll_need_32bit_api(sbi);
 323         struct md_op_data       *op_data;
 324         struct lu_fid           pfid = { 0 };
 325         __u64                   pos;
 326         int                     rc;
 327         ENTRY;
 328
 329         if (lfd != NULL)
 330                 pos = lfd->lfd_pos;
 331         else
 332                 pos = 0;
 333
 334         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) pos/size"
 335                "%lu/%llu 32bit_api %d\n", PFID(ll_inode2fid(inode)),
 336                inode, (unsigned long)pos, i_size_read(inode), api32);
 337
 338         if (pos == MDS_DIR_END_OFF)
 339                 /*
 340                  * end-of-file.
 341                  */
 342                 GOTO(out, rc = 0);
 343
 344         if (unlikely(ll_i2info(inode)->lli_lsm_md != NULL)) {
 345                 /* This is only needed for striped dir to fill ..,
 346                  * see lmv_read_entry */
 347                 if (file_dentry(filp)->d_parent != NULL &&
 348                     file_dentry(filp)->d_parent->d_inode != NULL) {
 349                         __u64 ibits = MDS_INODELOCK_UPDATE;
 350                         struct inode *parent =
 351                                 file_dentry(filp)->d_parent->d_inode;
 352
 353                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 354                                 pfid = *ll_inode2fid(parent);
 355                 }
 356
 357                 /* If it can not find in cache, do lookup .. on the master
 358                  * object */
 359                 if (fid_is_zero(&pfid)) {
 360                         rc = ll_dir_get_parent_fid(inode, &pfid);
 361                         if (rc != 0)
 362                                 RETURN(rc);
 363                 }
 364         }
 365
 366         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 367                                      LUSTRE_OPC_ANY, inode);
 368         if (IS_ERR(op_data))
 369                 GOTO(out, rc = PTR_ERR(op_data));
 370         op_data->op_fid3 = pfid;
 371
 372 #ifdef HAVE_DIR_CONTEXT
 373         ctx->pos = pos;
 374         rc = ll_dir_read(inode, &pos, op_data, ctx);
 375         pos = ctx->pos;
 376 #else
 377         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 378 #endif
 379         if (lfd != NULL)
 380                 lfd->lfd_pos = pos;
 381
 382         if (pos == MDS_DIR_END_OFF) {
 383                 if (api32)
 384                         pos = LL_DIR_END_OFF_32BIT;
 385                 else
 386                         pos = LL_DIR_END_OFF;
 387         } else {
 388                 if (api32 && hash64)
 389                         pos = pos >> 32;
 390         }
 391 #ifdef HAVE_DIR_CONTEXT
 392         ctx->pos = pos;
 393 #else
 394         filp->f_pos = pos;
 395 #endif
 396         ll_finish_md_op_data(op_data);
 397
 398 out:
 399         if (!rc)
 400                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 401
 402         RETURN(rc);
 403 }
 404
 405 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 406 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 407 {
 408         struct mgs_send_param *msp;
 409         int rc = 0;
 410
 411         OBD_ALLOC_PTR(msp);
 412         if (!msp)
 413                 return -ENOMEM;
 414
 415         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 416         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 417                                 sizeof(struct mgs_send_param), msp, NULL);
 418         if (rc)
 419                 CERROR("Failed to set parameter: %d\n", rc);
 420         OBD_FREE_PTR(msp);
 421
 422         return rc;
 423 }
 424 #endif
 425
 426 /**
 427  * Create striped directory with specified stripe(@lump)
 428  *
 429  * \param[in] dparent   the parent of the directory.
 430  * \param[in] lump      the specified stripes.
 431  * \param[in] dirname   the name of the directory.
 432  * \param[in] mode      the specified mode of the directory.
 433  *
 434  * \retval              =0 if striped directory is being created successfully.
 435  *                      <0 if the creation is failed.
 436  */
 437 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 438                                size_t len, const char *dirname, umode_t mode)
 439 {
 440         struct inode *parent = dparent->d_inode;
 441         struct ptlrpc_request *request = NULL;
 442         struct md_op_data *op_data;
 443         struct ll_sb_info *sbi = ll_i2sbi(parent);
 444         struct inode *inode = NULL;
 445         struct dentry dentry = {
 446                 .d_parent = dparent,
 447                 .d_name = {
 448                         .name = dirname,
 449                         .len = strlen(dirname),
 450                         .hash = ll_full_name_hash(dparent, dirname,
 451                                                   strlen(dirname)),
 452                 },
 453         };
 454         int err;
 455         ENTRY;
 456
 457         if (unlikely(lump->lum_magic != LMV_USER_MAGIC &&
 458                      lump->lum_magic != LMV_USER_MAGIC_SPECIFIC))
 459                 RETURN(-EINVAL);
 460
 461         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p) name %s "
 462                "stripe_offset %d, stripe_count: %u\n",
 463                PFID(ll_inode2fid(parent)), parent, dirname,
 464                (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 465
 466         if (lump->lum_stripe_count > 1 &&
 467             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 468                 RETURN(-EINVAL);
 469
 470         if (IS_DEADDIR(parent) &&
 471             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 472                 RETURN(-ENOENT);
 473
 474         if (lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC) &&
 475             lump->lum_magic != cpu_to_le32(LMV_USER_MAGIC_SPECIFIC))
 476                 lustre_swab_lmv_user_md(lump);
 477
 478         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 479                 mode &= ~current_umask();
 480         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 481         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 482                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 483                                      lump);
 484         if (IS_ERR(op_data))
 485                 RETURN(PTR_ERR(op_data));
 486
 487         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 488                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 489                  * to determine the security context for the file. So our fake
 490                  * dentry should be real enough for this purpose. */
 491                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 492                                               &op_data->op_file_secctx_name,
 493                                               &op_data->op_file_secctx,
 494                                               &op_data->op_file_secctx_size);
 495                 if (err < 0)
 496                         GOTO(out_op_data, err);
 497         }
 498
 499         op_data->op_cli_flags |= CLI_SET_MEA;
 500         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 501                         from_kuid(&init_user_ns, current_fsuid()),
 502                         from_kgid(&init_user_ns, current_fsgid()),
 503                         cfs_curproc_cap_pack(), 0, &request);
 504         if (err)
 505                 GOTO(out_request, err);
 506
 507         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 508
 509         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 510         if (err)
 511                 GOTO(out_inode, err);
 512
 513         dentry.d_inode = inode;
 514
 515         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 516                 inode_lock(inode);
 517                 err = security_inode_notifysecctx(inode,
 518                                                   op_data->op_file_secctx,
 519                                                   op_data->op_file_secctx_size);
 520                 inode_unlock(inode);
 521         } else {
 522                 err = ll_inode_init_security(&dentry, inode, parent);
 523         }
 524         if (err)
 525                 GOTO(out_inode, err);
 526
 527 out_inode:
 528         if (inode != NULL)
 529                 iput(inode);
 530 out_request:
 531         ptlrpc_req_finished(request);
 532 out_op_data:
 533         ll_finish_md_op_data(op_data);
 534
 535         return err;
 536 }
 537
 538 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 539                      int set_default)
 540 {
 541         struct ll_sb_info *sbi = ll_i2sbi(inode);
 542         struct md_op_data *op_data;
 543         struct ptlrpc_request *req = NULL;
 544         int rc = 0;
 545 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 546         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 547         struct obd_device *mgc = lsi->lsi_mgc;
 548 #endif
 549         int lum_size;
 550         ENTRY;
 551
 552         if (lump != NULL) {
 553                 /*
 554                  * This is coming from userspace, so should be in
 555                  * local endian.  But the MDS would like it in little
 556                  * endian, so we swab it before we send it.
 557                  */
 558                 switch (lump->lmm_magic) {
 559                 case LOV_USER_MAGIC_V1: {
 560                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 561                                 lustre_swab_lov_user_md_v1(lump);
 562                         lum_size = sizeof(struct lov_user_md_v1);
 563                         break;
 564                 }
 565                 case LOV_USER_MAGIC_V3: {
 566                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 567                                 lustre_swab_lov_user_md_v3(
 568                                         (struct lov_user_md_v3 *)lump);
 569                         lum_size = sizeof(struct lov_user_md_v3);
 570                         break;
 571                 }
 572                 case LOV_USER_MAGIC_COMP_V1: {
 573                         if (lump->lmm_magic !=
 574                             cpu_to_le32(LOV_USER_MAGIC_COMP_V1))
 575                                 lustre_swab_lov_comp_md_v1(
 576                                         (struct lov_comp_md_v1 *)lump);
 577                         lum_size = le32_to_cpu(
 578                                 ((struct lov_comp_md_v1 *)lump)->lcm_size);
 579                         break;
 580                 }
 581                 case LMV_USER_MAGIC: {
 582                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 583                                 lustre_swab_lmv_user_md(
 584                                         (struct lmv_user_md *)lump);
 585                         lum_size = sizeof(struct lmv_user_md);
 586                         break;
 587                 }
 588                 case LOV_USER_MAGIC_SPECIFIC: {
 589                         struct lov_user_md_v3 *v3 =
 590                                         (struct lov_user_md_v3 *)lump;
 591                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 592                                 RETURN(-EINVAL);
 593                         if (lump->lmm_magic !=
 594                             cpu_to_le32(LOV_USER_MAGIC_SPECIFIC)) {
 595                                 lustre_swab_lov_user_md_v3(v3);
 596                                 lustre_swab_lov_user_md_objects(v3->lmm_objects,
 597                                                 v3->lmm_stripe_count);
 598                         }
 599                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 600                                                     LOV_USER_MAGIC_SPECIFIC);
 601                         break;
 602                 }
 603                 default: {
 604                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 605                                         " %#08x != %#08x nor %#08x\n",
 606                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 607                                         LOV_USER_MAGIC_V3);
 608                         RETURN(-EINVAL);
 609                 }
 610                 }
 611         } else {
 612                 lum_size = sizeof(struct lov_user_md_v1);
 613         }
 614
 615         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 616                                      LUSTRE_OPC_ANY, NULL);
 617         if (IS_ERR(op_data))
 618                 RETURN(PTR_ERR(op_data));
 619
 620         /* swabbing is done in lov_setstripe() on server side */
 621         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 622         ll_finish_md_op_data(op_data);
 623         ptlrpc_req_finished(req);
 624         if (rc)
 625                 RETURN(rc);
 626
 627 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 628         /*
 629          * 2.9 server has stored filesystem default stripe in ROOT xattr,
 630          * and it's stored into system config for backward compatibility.
 631          *
 632          * In the following we use the fact that LOV_USER_MAGIC_V1 and
 633          * LOV_USER_MAGIC_V3 have the same initial fields so we do not
 634          * need the make the distiction between the 2 versions
 635          */
 636         if (set_default && mgc->u.cli.cl_mgc_mgsexp &&
 637             (lump == NULL ||
 638              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V1 ||
 639              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V3)) {
 640                 char *param = NULL;
 641                 char *buf;
 642
 643                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 644                 if (param == NULL)
 645                         GOTO(end, rc = -ENOMEM);
 646
 647                 buf = param;
 648                 /* Get fsname and assume devname to be -MDT0000. */
 649                 ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
 650                 strcat(buf, "-MDT0000.lov");
 651                 buf += strlen(buf);
 652
 653                 /* Set root stripesize */
 654                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripesize=%u",
 655                          lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 656                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 657                 if (rc)
 658                         GOTO(end, rc);
 659
 660                 /* Set root stripecount */
 661                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripecount=%hd",
 662                          lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 663                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 664                 if (rc)
 665                         GOTO(end, rc);
 666
 667                 /* Set root stripeoffset */
 668                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripeoffset=%hd",
 669                          lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 670                                 (typeof(lump->lmm_stripe_offset))(-1));
 671                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 672
 673 end:
 674                 if (param != NULL)
 675                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 676         }
 677 #endif
 678         RETURN(rc);
 679 }
 680
 681 /**
 682  * This function will be used to get default LOV/LMV/Default LMV
 683  * @valid will be used to indicate which stripe it will retrieve
 684  *      OBD_MD_MEA              LMV stripe EA
 685  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 686  *      otherwise               Default LOV EA.
 687  * Each time, it can only retrieve 1 stripe EA
 688  **/
 689 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 690                      struct ptlrpc_request **request, u64 valid)
 691 {
 692         struct ll_sb_info *sbi = ll_i2sbi(inode);
 693         struct mdt_body   *body;
 694         struct lov_mds_md *lmm = NULL;
 695         struct ptlrpc_request *req = NULL;
 696         int rc, lmm_size;
 697         struct md_op_data *op_data;
 698         ENTRY;
 699
 700         rc = ll_get_default_mdsize(sbi, &lmm_size);
 701         if (rc)
 702                 RETURN(rc);
 703
 704         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 705                                      0, lmm_size, LUSTRE_OPC_ANY,
 706                                      NULL);
 707         if (IS_ERR(op_data))
 708                 RETURN(PTR_ERR(op_data));
 709
 710         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 711         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 712         ll_finish_md_op_data(op_data);
 713         if (rc < 0) {
 714                 CDEBUG(D_INFO, "md_getattr failed on inode "
 715                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 716                 GOTO(out, rc);
 717         }
 718
 719         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 720         LASSERT(body != NULL);
 721
 722         lmm_size = body->mbo_eadatasize;
 723
 724         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 725             lmm_size == 0) {
 726                 GOTO(out, rc = -ENODATA);
 727         }
 728
 729         lmm = req_capsule_server_sized_get(&req->rq_pill,
 730                                            &RMF_MDT_MD, lmm_size);
 731         LASSERT(lmm != NULL);
 732
 733         /*
 734          * This is coming from the MDS, so is probably in
 735          * little endian.  We convert it to host endian before
 736          * passing it to userspace.
 737          */
 738         /* We don't swab objects for directories */
 739         switch (le32_to_cpu(lmm->lmm_magic)) {
 740         case LOV_MAGIC_V1:
 741                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 742                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 743                 break;
 744         case LOV_MAGIC_V3:
 745                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 746                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 747                 break;
 748         case LOV_MAGIC_COMP_V1:
 749                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 750                         lustre_swab_lov_comp_md_v1(
 751                                         (struct lov_comp_md_v1 *)lmm);
 752                 break;
 753         case LMV_MAGIC_V1:
 754                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 755                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 756                 break;
 757         case LMV_USER_MAGIC:
 758                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 759                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 760                 break;
 761         case LOV_USER_MAGIC_SPECIFIC: {
 762                 struct lov_user_md_v3 *v3 = (struct lov_user_md_v3 *)lmm;
 763
 764                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC)) {
 765                         lustre_swab_lov_user_md_v3(v3);
 766                         lustre_swab_lov_user_md_objects(v3->lmm_objects,
 767                                                         v3->lmm_stripe_count);
 768                         }
 769                 }
 770                 break;
 771         default:
 772                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 773                 rc = -EPROTO;
 774         }
 775 out:
 776         *plmm = lmm;
 777         *plmm_size = lmm_size;
 778         *request = req;
 779         return rc;
 780 }
 781
 782 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 783 {
 784         struct md_op_data       *op_data;
 785         int                     rc;
 786         int                     mdt_index;
 787         ENTRY;
 788
 789         OBD_ALLOC_PTR(op_data);
 790         if (op_data == NULL)
 791                 RETURN(-ENOMEM);
 792
 793         op_data->op_flags |= MF_GET_MDT_IDX;
 794         op_data->op_fid1 = *fid;
 795         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 796         mdt_index = op_data->op_mds;
 797         OBD_FREE_PTR(op_data);
 798         if (rc < 0)
 799                 RETURN(rc);
 800
 801         RETURN(mdt_index);
 802 }
 803
 804 /*
 805  *  Get MDT index for the inode.
 806  */
 807 int ll_get_mdt_idx(struct inode *inode)
 808 {
 809         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 810 }
 811
 812 /**
 813  * Generic handler to do any pre-copy work.
 814  *
 815  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 816  * first information for it that real work has started.
 817  *
 818  * Moreover, for a ARCHIVE request, it will sample the file data version and
 819  * store it in \a copy.
 820  *
 821  * \return 0 on success.
 822  */
 823 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 824 {
 825         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 826         struct hsm_progress_kernel       hpk;
 827         int                              rc = 0;
 828         int                              rc2;
 829         ENTRY;
 830
 831         /* Forge a hsm_progress based on data from copy. */
 832         hpk.hpk_fid = copy->hc_hai.hai_fid;
 833         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 834         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 835         hpk.hpk_extent.length = 0;
 836         hpk.hpk_flags = 0;
 837         hpk.hpk_errval = 0;
 838         hpk.hpk_data_version = 0;
 839
 840
 841         /* For archive request, we need to read the current file version. */
 842         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 843                 struct inode    *inode;
 844                 __u64            data_version = 0;
 845
 846                 /* Get inode for this fid */
 847                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 848                 if (IS_ERR(inode)) {
 849                         hpk.hpk_flags |= HP_FLAG_RETRY;
 850                         /* hpk_errval is >= 0 */
 851                         hpk.hpk_errval = -PTR_ERR(inode);
 852                         GOTO(progress, rc = PTR_ERR(inode));
 853                 }
 854
 855                 /* Read current file data version */
 856                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 857                 iput(inode);
 858                 if (rc != 0) {
 859                         CDEBUG(D_HSM, "Could not read file data version of "
 860                                       DFID" (rc = %d). Archive request ("
 861                                       "%#llx) could not be done.\n",
 862                                       PFID(&copy->hc_hai.hai_fid), rc,
 863                                       copy->hc_hai.hai_cookie);
 864                         hpk.hpk_flags |= HP_FLAG_RETRY;
 865                         /* hpk_errval must be >= 0 */
 866                         hpk.hpk_errval = -rc;
 867                         GOTO(progress, rc);
 868                 }
 869
 870                 /* Store in the hsm_copy for later copytool use.
 871                  * Always modified even if no lsm. */
 872                 copy->hc_data_version = data_version;
 873         }
 874
 875 progress:
 876         /* On error, the request should be considered as completed */
 877         if (hpk.hpk_errval > 0)
 878                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 879
 880         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 881                             &hpk, NULL);
 882
 883         /* Return first error */
 884         RETURN(rc != 0 ? rc : rc2);
 885 }
 886
 887 /**
 888  * Generic handler to do any post-copy work.
 889  *
 890  * It will send the last hsm_progress update to coordinator to inform it
 891  * that copy is finished and whether it was successful or not.
 892  *
 893  * Moreover,
 894  * - for ARCHIVE request, it will sample the file data version and compare it
 895  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 896  *   will be considered as failed.
 897  * - for RESTORE request, it will sample the file data version and send it to
 898  *   coordinator which is useful if the file was imported as 'released'.
 899  *
 900  * \return 0 on success.
 901  */
 902 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 903 {
 904         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 905         struct hsm_progress_kernel       hpk;
 906         int                              rc = 0;
 907         int                              rc2;
 908         ENTRY;
 909
 910         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 911         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 912          * initialized if copy_end was called with copy == NULL.
 913          */
 914
 915         /* Forge a hsm_progress based on data from copy. */
 916         hpk.hpk_fid = copy->hc_hai.hai_fid;
 917         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 918         hpk.hpk_extent = copy->hc_hai.hai_extent;
 919         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 920         hpk.hpk_errval = copy->hc_errval;
 921         hpk.hpk_data_version = 0;
 922
 923         /* For archive request, we need to check the file data was not changed.
 924          *
 925          * For restore request, we need to send the file data version, this is
 926          * useful when the file was created using hsm_import.
 927          */
 928         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 929              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 930             (copy->hc_errval == 0)) {
 931                 struct inode    *inode;
 932                 __u64            data_version = 0;
 933
 934                 /* Get lsm for this fid */
 935                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 936                 if (IS_ERR(inode)) {
 937                         hpk.hpk_flags |= HP_FLAG_RETRY;
 938                         /* hpk_errval must be >= 0 */
 939                         hpk.hpk_errval = -PTR_ERR(inode);
 940                         GOTO(progress, rc = PTR_ERR(inode));
 941                 }
 942
 943                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 944                 iput(inode);
 945                 if (rc) {
 946                         CDEBUG(D_HSM, "Could not read file data version. "
 947                                       "Request could not be confirmed.\n");
 948                         if (hpk.hpk_errval == 0)
 949                                 hpk.hpk_errval = -rc;
 950                         GOTO(progress, rc);
 951                 }
 952
 953                 /* Store in the hsm_copy for later copytool use.
 954                  * Always modified even if no lsm. */
 955                 hpk.hpk_data_version = data_version;
 956
 957                 /* File could have been stripped during archiving, so we need
 958                  * to check anyway. */
 959                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 960                     (copy->hc_data_version != data_version)) {
 961                         CDEBUG(D_HSM, "File data version mismatched. "
 962                               "File content was changed during archiving. "
 963                                DFID", start:%#llx current:%#llx\n",
 964                                PFID(&copy->hc_hai.hai_fid),
 965                                copy->hc_data_version, data_version);
 966                         /* File was changed, send error to cdt. Do not ask for
 967                          * retry because if a file is modified frequently,
 968                          * the cdt will loop on retried archive requests.
 969                          * The policy engine will ask for a new archive later
 970                          * when the file will not be modified for some tunable
 971                          * time */
 972                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 973                         rc = -EBUSY;
 974                         /* hpk_errval must be >= 0 */
 975                         hpk.hpk_errval = -rc;
 976                         GOTO(progress, rc);
 977                 }
 978
 979         }
 980
 981 progress:
 982         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 983                             &hpk, NULL);
 984
 985         /* Return first error */
 986         RETURN(rc != 0 ? rc : rc2);
 987 }
 988
 989
 990 static int copy_and_ct_start(int cmd, struct obd_export *exp,
 991                              const struct lustre_kernelcomm __user *data)
 992 {
 993         struct lustre_kernelcomm *lk;
 994         struct lustre_kernelcomm *tmp;
 995         size_t size = sizeof(*lk);
 996         size_t new_size;
 997         int i;
 998         int rc;
 999
1000         /* copy data from userspace to get numbers of archive_id */
1001         OBD_ALLOC(lk, size);
1002         if (lk == NULL)
1003                 return -ENOMEM;
1004
1005         if (copy_from_user(lk, data, size))
1006                 GOTO(out_lk, rc = -EFAULT);
1007
1008         if (lk->lk_flags & LK_FLG_STOP)
1009                 goto do_ioctl;
1010
1011         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1012                 __u32 archive_mask = lk->lk_data_count;
1013                 int count;
1014
1015                 /* old hsm agent to old MDS */
1016                 if (!exp_connect_archive_id_array(exp))
1017                         goto do_ioctl;
1018
1019                 /* old hsm agent to new MDS */
1020                 lk->lk_flags |= LK_FLG_DATANR;
1021
1022                 if (archive_mask == 0)
1023                         goto do_ioctl;
1024
1025                 count = hweight32(archive_mask);
1026                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1027                 OBD_ALLOC(tmp, new_size);
1028                 if (tmp == NULL)
1029                         GOTO(out_lk, rc = -ENOMEM);
1030
1031                 memcpy(tmp, lk, size);
1032                 tmp->lk_data_count = count;
1033                 OBD_FREE(lk, size);
1034                 lk = tmp;
1035                 size = new_size;
1036
1037                 count = 0;
1038                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1039                         if ((1 << i) & archive_mask) {
1040                                 lk->lk_data[count] = i + 1;
1041                                 count++;
1042                         }
1043                 }
1044                 goto do_ioctl;
1045         }
1046
1047         /* new hsm agent to new mds */
1048         if (lk->lk_data_count > 0) {
1049                 new_size = offsetof(struct lustre_kernelcomm,
1050                                     lk_data[lk->lk_data_count]);
1051                 OBD_ALLOC(tmp, new_size);
1052                 if (tmp == NULL)
1053                         GOTO(out_lk, rc = -ENOMEM);
1054
1055                 OBD_FREE(lk, size);
1056                 lk = tmp;
1057                 size = new_size;
1058
1059                 if (copy_from_user(lk, data, size))
1060                         GOTO(out_lk, rc = -EFAULT);
1061         }
1062
1063         /* new hsm agent to old MDS */
1064         if (!exp_connect_archive_id_array(exp)) {
1065                 __u32 archives = 0;
1066
1067                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1068                         GOTO(out_lk, rc = -EINVAL);
1069
1070                 for (i = 0; i < lk->lk_data_count; i++) {
1071                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1072                                 rc = -EINVAL;
1073                                 CERROR("%s: archive id %d requested but only "
1074                                        "[0 - %zu] supported: rc = %d\n",
1075                                        exp->exp_obd->obd_name, lk->lk_data[i],
1076                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1077                                 GOTO(out_lk, rc);
1078                         }
1079
1080                         if (lk->lk_data[i] == 0) {
1081                                 archives = 0;
1082                                 break;
1083                         }
1084
1085                         archives |= (1 << (lk->lk_data[i] - 1));
1086                 }
1087                 lk->lk_flags &= ~LK_FLG_DATANR;
1088                 lk->lk_data_count = archives;
1089         }
1090 do_ioctl:
1091         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1092 out_lk:
1093         OBD_FREE(lk, size);
1094         return rc;
1095 }
1096
1097 static int check_owner(int type, int id)
1098 {
1099         switch (type) {
1100         case USRQUOTA:
1101                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1102                         return -EPERM;
1103                 break;
1104         case GRPQUOTA:
1105                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1106                         return -EPERM;
1107                 break;
1108         case PRJQUOTA:
1109                 break;
1110         }
1111         return 0;
1112 }
1113
1114 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1115 {
1116         int cmd = qctl->qc_cmd;
1117         int type = qctl->qc_type;
1118         int id = qctl->qc_id;
1119         int valid = qctl->qc_valid;
1120         int rc = 0;
1121         ENTRY;
1122
1123         switch (cmd) {
1124         case Q_SETQUOTA:
1125         case Q_SETINFO:
1126         case LUSTRE_Q_SETDEFAULT:
1127                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1128                         RETURN(-EPERM);
1129                 break;
1130         case Q_GETQUOTA:
1131         case LUSTRE_Q_GETDEFAULT:
1132                 if (check_owner(type, id) &&
1133                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1134                         RETURN(-EPERM);
1135                 break;
1136         case Q_GETINFO:
1137                 break;
1138         default:
1139                 CERROR("unsupported quotactl op: %#x\n", cmd);
1140                 RETURN(-ENOTSUPP);
1141         }
1142
1143         if (valid != QC_GENERAL) {
1144                 if (cmd == Q_GETINFO)
1145                         qctl->qc_cmd = Q_GETOINFO;
1146                 else if (cmd == Q_GETQUOTA)
1147                         qctl->qc_cmd = Q_GETOQUOTA;
1148                 else
1149                         RETURN(-EINVAL);
1150
1151                 switch (valid) {
1152                 case QC_MDTIDX:
1153                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1154                                            sizeof(*qctl), qctl, NULL);
1155                         break;
1156                 case QC_OSTIDX:
1157                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1158                                            sizeof(*qctl), qctl, NULL);
1159                         break;
1160                 case QC_UUID:
1161                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1162                                            sizeof(*qctl), qctl, NULL);
1163                         if (rc == -EAGAIN)
1164                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1165                                                    sbi->ll_dt_exp,
1166                                                    sizeof(*qctl), qctl, NULL);
1167                         break;
1168                 default:
1169                         rc = -EINVAL;
1170                         break;
1171                 }
1172
1173                 if (rc)
1174                         RETURN(rc);
1175
1176                 qctl->qc_cmd = cmd;
1177         } else {
1178                 struct obd_quotactl *oqctl;
1179
1180                 OBD_ALLOC_PTR(oqctl);
1181                 if (oqctl == NULL)
1182                         RETURN(-ENOMEM);
1183
1184                 QCTL_COPY(oqctl, qctl);
1185                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1186                 if (rc) {
1187                         OBD_FREE_PTR(oqctl);
1188                         RETURN(rc);
1189                 }
1190                 /* If QIF_SPACE is not set, client should collect the
1191                  * space usage from OSSs by itself */
1192                 if (cmd == Q_GETQUOTA &&
1193                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1194                     !oqctl->qc_dqblk.dqb_curspace) {
1195                         struct obd_quotactl *oqctl_tmp;
1196
1197                         OBD_ALLOC_PTR(oqctl_tmp);
1198                         if (oqctl_tmp == NULL)
1199                                 GOTO(out, rc = -ENOMEM);
1200
1201                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1202                         oqctl_tmp->qc_id = oqctl->qc_id;
1203                         oqctl_tmp->qc_type = oqctl->qc_type;
1204
1205                         /* collect space usage from OSTs */
1206                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1207                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1208                         if (!rc || rc == -EREMOTEIO) {
1209                                 oqctl->qc_dqblk.dqb_curspace =
1210                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1211                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1212                         }
1213
1214                         /* collect space & inode usage from MDTs */
1215                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1216                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1217                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1218                         if (!rc || rc == -EREMOTEIO) {
1219                                 oqctl->qc_dqblk.dqb_curspace +=
1220                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1221                                 oqctl->qc_dqblk.dqb_curinodes =
1222                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1223                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1224                         } else {
1225                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1226                         }
1227
1228                         OBD_FREE_PTR(oqctl_tmp);
1229                 }
1230 out:
1231                 QCTL_COPY(qctl, oqctl);
1232                 OBD_FREE_PTR(oqctl);
1233         }
1234
1235         RETURN(rc);
1236 }
1237
1238 /* This function tries to get a single name component,
1239  * to send to the server. No actual path traversal involved,
1240  * so we limit to NAME_MAX */
1241 static char *ll_getname(const char __user *filename)
1242 {
1243         int ret = 0, len;
1244         char *tmp;
1245
1246         OBD_ALLOC(tmp, NAME_MAX + 1);
1247
1248         if (!tmp)
1249                 return ERR_PTR(-ENOMEM);
1250
1251         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1252         if (len < 0)
1253                 ret = -ENOENT;
1254         else if (len > NAME_MAX)
1255                 ret = -ENAMETOOLONG;
1256
1257         if (ret) {
1258                 OBD_FREE(tmp, NAME_MAX + 1);
1259                 tmp =  ERR_PTR(ret);
1260         }
1261         return tmp;
1262 }
1263
1264 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1265
1266 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1267 {
1268         struct dentry *dentry = file_dentry(file);
1269         struct inode *inode = file_inode(file);
1270         struct ll_sb_info *sbi = ll_i2sbi(inode);
1271         struct obd_ioctl_data *data;
1272         int rc = 0;
1273         ENTRY;
1274
1275         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1276                PFID(ll_inode2fid(inode)), inode, cmd);
1277
1278         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1279         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1280                 return -ENOTTY;
1281
1282         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1283         switch (cmd) {
1284         case FS_IOC_GETFLAGS:
1285         case FS_IOC_SETFLAGS:
1286                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1287         case FSFILT_IOC_GETVERSION:
1288         case FS_IOC_GETVERSION:
1289                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1290         /* We need to special case any other ioctls we want to handle,
1291          * to send them to the MDS/OST as appropriate and to properly
1292          * network encode the arg field. */
1293         case FS_IOC_SETVERSION:
1294                 RETURN(-ENOTSUPP);
1295
1296         case LL_IOC_GET_MDTIDX: {
1297                 int mdtidx;
1298
1299                 mdtidx = ll_get_mdt_idx(inode);
1300                 if (mdtidx < 0)
1301                         RETURN(mdtidx);
1302
1303                 if (put_user((int)mdtidx, (int __user *)arg))
1304                         RETURN(-EFAULT);
1305
1306                 return 0;
1307         }
1308         case IOC_MDC_LOOKUP: {
1309                                      int namelen, len = 0;
1310                 char *buf = NULL;
1311                 char *filename;
1312
1313                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1314                 if (rc != 0)
1315                         RETURN(rc);
1316                 data = (void *)buf;
1317
1318                 filename = data->ioc_inlbuf1;
1319                 namelen = strlen(filename);
1320                 if (namelen < 1) {
1321                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1322                         GOTO(out_free, rc = -EINVAL);
1323                 }
1324
1325                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1326                 if (rc < 0) {
1327                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1328                                ll_get_fsname(inode->i_sb, NULL, 0), namelen,
1329                                filename, rc);
1330                         GOTO(out_free, rc);
1331                 }
1332 out_free:
1333                 OBD_FREE_LARGE(buf, len);
1334                 return rc;
1335         }
1336         case LL_IOC_LMV_SETSTRIPE: {
1337                 struct lmv_user_md  *lum;
1338                 char            *buf = NULL;
1339                 char            *filename;
1340                 int              namelen = 0;
1341                 int              lumlen = 0;
1342                 umode_t          mode;
1343                 int              len;
1344                 int              rc;
1345
1346                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1347                 if (rc)
1348                         RETURN(rc);
1349
1350                 data = (void *)buf;
1351                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1352                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1353                         GOTO(lmv_out_free, rc = -EINVAL);
1354
1355                 filename = data->ioc_inlbuf1;
1356                 namelen = data->ioc_inllen1;
1357
1358                 if (namelen < 1) {
1359                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1360                         GOTO(lmv_out_free, rc = -EINVAL);
1361                 }
1362                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1363                 lumlen = data->ioc_inllen2;
1364
1365                 if ((lum->lum_magic != LMV_USER_MAGIC &&
1366                      lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) ||
1367                     lumlen < sizeof(*lum)) {
1368                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1369                                filename, lum->lum_magic, lumlen, -EFAULT);
1370                         GOTO(lmv_out_free, rc = -EINVAL);
1371                 }
1372
1373 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1374                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1375 #else
1376                 mode = data->ioc_type;
1377 #endif
1378                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1379 lmv_out_free:
1380                 OBD_FREE_LARGE(buf, len);
1381                 RETURN(rc);
1382
1383         }
1384         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1385                 struct lmv_user_md        lum;
1386                 struct lmv_user_md __user *ulump =
1387                                         (struct lmv_user_md __user *)arg;
1388                 int                       rc;
1389
1390                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1391                         RETURN(-EFAULT);
1392
1393                 if (lum.lum_magic != LMV_USER_MAGIC)
1394                         RETURN(-EINVAL);
1395
1396                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1397
1398                 RETURN(rc);
1399         }
1400         case LL_IOC_LOV_SETSTRIPE_NEW:
1401         case LL_IOC_LOV_SETSTRIPE: {
1402                 struct lov_user_md_v3 *lumv3 = NULL;
1403                 struct lov_user_md_v1 lumv1;
1404                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1405                 struct lov_user_md_v1 __user *lumv1p =
1406                         (struct lov_user_md_v1 __user *)arg;
1407                 struct lov_user_md_v3 __user *lumv3p =
1408                         (struct lov_user_md_v3 __user *)arg;
1409                 int lum_size = 0;
1410
1411                 int set_default = 0;
1412
1413                 CLASSERT(sizeof(struct lov_user_md_v3) >
1414                          sizeof(struct lov_comp_md_v1));
1415                 CLASSERT(sizeof(*lumv3) == sizeof(*lumv3p));
1416                 /* first try with v1 which is smaller than v3 */
1417                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1418                         RETURN(-EFAULT);
1419
1420                 if (inode->i_sb->s_root == file_dentry(file))
1421                         set_default = 1;
1422
1423                 switch (lumv1.lmm_magic) {
1424                 case LOV_USER_MAGIC_V3:
1425                 case LOV_USER_MAGIC_SPECIFIC:
1426                         lum_size = ll_lov_user_md_size(&lumv1);
1427                         if (lum_size < 0)
1428                                 RETURN(lum_size);
1429                         OBD_ALLOC(lumv3, lum_size);
1430                         if (!lumv3)
1431                                 RETURN(-ENOMEM);
1432                         if (copy_from_user(lumv3, lumv3p, lum_size))
1433                                 GOTO(out, rc = -EFAULT);
1434                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1435                         break;
1436                 case LOV_USER_MAGIC_V1:
1437                         break;
1438                 default:
1439                         GOTO(out, rc = -ENOTSUPP);
1440                 }
1441
1442                 /* in v1 and v3 cases lumv1 points to data */
1443                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1444 out:
1445                 if (lumv3)
1446                         OBD_FREE(lumv3, lum_size);
1447                 RETURN(rc);
1448         }
1449         case LL_IOC_LMV_GETSTRIPE: {
1450                 struct lmv_user_md __user *ulmv =
1451                                         (struct lmv_user_md __user *)arg;
1452                 struct lmv_user_md      lum;
1453                 struct ptlrpc_request   *request = NULL;
1454                 union lmv_mds_md        *lmm = NULL;
1455                 int                     lmmsize;
1456                 u64                     valid = 0;
1457                 struct lmv_user_md      *tmp = NULL;
1458                 int                     mdt_index;
1459                 int                     lum_size;
1460                 int                     stripe_count;
1461                 int                     max_stripe_count;
1462                 int                     i;
1463                 int                     rc;
1464
1465                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1466                         RETURN(-EFAULT);
1467
1468                 max_stripe_count = lum.lum_stripe_count;
1469                 /* lum_magic will indicate which stripe the ioctl will like
1470                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1471                  * is for default LMV stripe */
1472                 if (lum.lum_magic == LMV_MAGIC_V1)
1473                         valid |= OBD_MD_MEA;
1474                 else if (lum.lum_magic == LMV_USER_MAGIC)
1475                         valid |= OBD_MD_DEFAULT_MEA;
1476                 else
1477                         RETURN(-EINVAL);
1478
1479                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1480                                       valid);
1481                 if (rc != 0)
1482                         GOTO(finish_req, rc);
1483
1484                 /* Get default LMV EA */
1485                 if (lum.lum_magic == LMV_USER_MAGIC) {
1486                         if (lmmsize > sizeof(*ulmv))
1487                                 GOTO(finish_req, rc = -EINVAL);
1488
1489                         if (copy_to_user(ulmv, lmm, lmmsize))
1490                                 GOTO(finish_req, rc = -EFAULT);
1491
1492                         GOTO(finish_req, rc);
1493                 }
1494
1495                 stripe_count = lmv_mds_md_stripe_count_get(lmm);
1496                 if (max_stripe_count < stripe_count) {
1497                         lum.lum_stripe_count = stripe_count;
1498                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1499                                 GOTO(finish_req, rc = -EFAULT);
1500                         GOTO(finish_req, rc = -E2BIG);
1501                 }
1502
1503                 lum_size = lmv_user_md_size(stripe_count,
1504                                             LMV_USER_MAGIC_SPECIFIC);
1505                 OBD_ALLOC(tmp, lum_size);
1506                 if (tmp == NULL)
1507                         GOTO(finish_req, rc = -ENOMEM);
1508
1509                 mdt_index = ll_get_mdt_idx(inode);
1510                 if (mdt_index < 0)
1511                         GOTO(out_tmp, rc = -ENOMEM);
1512
1513                 tmp->lum_magic = LMV_MAGIC_V1;
1514                 tmp->lum_stripe_count = 0;
1515                 tmp->lum_stripe_offset = mdt_index;
1516                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1517                 for (i = 0; i < stripe_count; i++) {
1518                         struct lu_fid   fid;
1519
1520                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1521                         mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1522                         if (mdt_index < 0)
1523                                 GOTO(out_tmp, rc = mdt_index);
1524
1525                         tmp->lum_objects[i].lum_mds = mdt_index;
1526                         tmp->lum_objects[i].lum_fid = fid;
1527                         tmp->lum_stripe_count++;
1528                 }
1529
1530                 if (copy_to_user(ulmv, tmp, lum_size))
1531                         GOTO(out_tmp, rc = -EFAULT);
1532 out_tmp:
1533                 OBD_FREE(tmp, lum_size);
1534 finish_req:
1535                 ptlrpc_req_finished(request);
1536                 return rc;
1537         }
1538
1539         case LL_IOC_REMOVE_ENTRY: {
1540                 char            *filename = NULL;
1541                 int              namelen = 0;
1542                 int              rc;
1543
1544                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1545                  * unsupported server, which might crash the server(LU-2730),
1546                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1547                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1548                  * server will support REINT_RMENTRY XXX*/
1549                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1550                         RETURN(-ENOTSUPP);
1551
1552                 filename = ll_getname((const char __user *)arg);
1553                 if (IS_ERR(filename))
1554                         RETURN(PTR_ERR(filename));
1555
1556                 namelen = strlen(filename);
1557                 if (namelen < 1)
1558                         GOTO(out_rmdir, rc = -EINVAL);
1559
1560                 rc = ll_rmdir_entry(inode, filename, namelen);
1561 out_rmdir:
1562                 if (filename)
1563                         ll_putname(filename);
1564                 RETURN(rc);
1565         }
1566         case LL_IOC_LOV_SWAP_LAYOUTS:
1567                 RETURN(-EPERM);
1568         case IOC_OBD_STATFS:
1569                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1570         case LL_IOC_LOV_GETSTRIPE:
1571         case LL_IOC_LOV_GETSTRIPE_NEW:
1572         case LL_IOC_MDC_GETINFO:
1573         case IOC_MDC_GETFILEINFO:
1574         case IOC_MDC_GETFILESTRIPE: {
1575                 struct ptlrpc_request *request = NULL;
1576                 struct lov_user_md __user *lump;
1577                 struct lov_mds_md *lmm = NULL;
1578                 struct mdt_body *body;
1579                 char *filename = NULL;
1580                 int lmmsize;
1581
1582                 if (cmd == IOC_MDC_GETFILEINFO ||
1583                     cmd == IOC_MDC_GETFILESTRIPE) {
1584                         filename = ll_getname((const char __user *)arg);
1585                         if (IS_ERR(filename))
1586                                 RETURN(PTR_ERR(filename));
1587
1588                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1589                                                       &lmmsize, &request);
1590                 } else {
1591                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1592                                               &request, 0);
1593                 }
1594
1595                 if (request) {
1596                         body = req_capsule_server_get(&request->rq_pill,
1597                                                       &RMF_MDT_BODY);
1598                         LASSERT(body != NULL);
1599                 } else {
1600                         GOTO(out_req, rc);
1601                 }
1602
1603                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1604                                        cmd == LL_IOC_MDC_GETINFO)) {
1605                         lmmsize = 0;
1606                         rc = 0;
1607                 }
1608
1609                 if (rc < 0)
1610                         GOTO(out_req, rc);
1611
1612                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1613                     cmd == LL_IOC_LOV_GETSTRIPE ||
1614                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1615                         lump = (struct lov_user_md __user *)arg;
1616                 } else {
1617                         struct lov_user_mds_data __user *lmdp;
1618                         lmdp = (struct lov_user_mds_data __user *)arg;
1619                         lump = &lmdp->lmd_lmm;
1620                 }
1621
1622                 if (lmmsize == 0) {
1623                         /* If the file has no striping then zero out *lump so
1624                          * that the caller isn't confused by garbage. */
1625                         if (clear_user(lump, sizeof(*lump)))
1626                                 GOTO(out_req, rc = -EFAULT);
1627                 } else if (copy_to_user(lump, lmm, lmmsize)) {
1628                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1629                                 GOTO(out_req, rc = -EFAULT);
1630                         rc = -EOVERFLOW;
1631                 }
1632
1633                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1634                         struct lov_user_mds_data __user *lmdp;
1635                         lstat_t st = { 0 };
1636
1637                         st.st_dev       = inode->i_sb->s_dev;
1638                         st.st_mode      = body->mbo_mode;
1639                         st.st_nlink     = body->mbo_nlink;
1640                         st.st_uid       = body->mbo_uid;
1641                         st.st_gid       = body->mbo_gid;
1642                         st.st_rdev      = body->mbo_rdev;
1643                         st.st_size      = body->mbo_size;
1644                         st.st_blksize   = PAGE_SIZE;
1645                         st.st_blocks    = body->mbo_blocks;
1646                         st.st_atime     = body->mbo_atime;
1647                         st.st_mtime     = body->mbo_mtime;
1648                         st.st_ctime     = body->mbo_ctime;
1649                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1650                                                 sbi->ll_flags &
1651                                                 LL_SBI_32BIT_API);
1652
1653                         lmdp = (struct lov_user_mds_data __user *)arg;
1654                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1655                                 GOTO(out_req, rc = -EFAULT);
1656                 }
1657
1658                 EXIT;
1659         out_req:
1660                 ptlrpc_req_finished(request);
1661                 if (filename)
1662                         ll_putname(filename);
1663                 return rc;
1664         }
1665         case OBD_IOC_QUOTACTL: {
1666                 struct if_quotactl *qctl;
1667
1668                 OBD_ALLOC_PTR(qctl);
1669                 if (!qctl)
1670                         RETURN(-ENOMEM);
1671
1672                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1673                         GOTO(out_quotactl, rc = -EFAULT);
1674
1675                 rc = quotactl_ioctl(sbi, qctl);
1676
1677                 if (rc == 0 &&
1678                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1679                         rc = -EFAULT;
1680
1681         out_quotactl:
1682                 OBD_FREE_PTR(qctl);
1683                 RETURN(rc);
1684         }
1685         case OBD_IOC_GETDTNAME:
1686         case OBD_IOC_GETMDNAME:
1687                 RETURN(ll_get_obd_name(inode, cmd, arg));
1688         case LL_IOC_FLUSHCTX:
1689                 RETURN(ll_flush_ctx(inode));
1690         case LL_IOC_GETOBDCOUNT: {
1691                 u32 count, vallen;
1692                 struct obd_export *exp;
1693
1694                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1695                         RETURN(-EFAULT);
1696
1697                 /* get ost count when count is zero, get mdt count otherwise */
1698                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1699                 vallen = sizeof(count);
1700                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1701                                   KEY_TGT_COUNT, &vallen, &count);
1702                 if (rc) {
1703                         CERROR("get target count failed: %d\n", rc);
1704                         RETURN(rc);
1705                 }
1706
1707                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1708                         RETURN(-EFAULT);
1709
1710                 RETURN(0);
1711         }
1712         case LL_IOC_PATH2FID:
1713                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1714                                      sizeof(struct lu_fid)))
1715                         RETURN(-EFAULT);
1716                 RETURN(0);
1717         case LL_IOC_GET_CONNECT_FLAGS: {
1718                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1719                                      (void __user *)arg));
1720         }
1721         case OBD_IOC_FID2PATH:
1722                 RETURN(ll_fid2path(inode, (void __user *)arg));
1723         case LL_IOC_GETPARENT:
1724                 RETURN(ll_getparent(file, (void __user *)arg));
1725         case LL_IOC_FID2MDTIDX: {
1726                 struct obd_export *exp = ll_i2mdexp(inode);
1727                 struct lu_fid     fid;
1728                 __u32             index;
1729
1730                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1731                                    sizeof(fid)))
1732                         RETURN(-EFAULT);
1733
1734                 /* Call mdc_iocontrol */
1735                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1736                                    (__u32 __user *)&index);
1737                 if (rc != 0)
1738                         RETURN(rc);
1739
1740                 RETURN(index);
1741         }
1742         case LL_IOC_HSM_REQUEST: {
1743                 struct hsm_user_request *hur;
1744                 ssize_t                  totalsize;
1745
1746                 OBD_ALLOC_PTR(hur);
1747                 if (hur == NULL)
1748                         RETURN(-ENOMEM);
1749
1750                 /* We don't know the true size yet; copy the fixed-size part */
1751                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1752                         OBD_FREE_PTR(hur);
1753                         RETURN(-EFAULT);
1754                 }
1755
1756                 /* Compute the whole struct size */
1757                 totalsize = hur_len(hur);
1758                 OBD_FREE_PTR(hur);
1759                 if (totalsize < 0)
1760                         RETURN(-E2BIG);
1761
1762                 /* Final size will be more than double totalsize */
1763                 if (totalsize >= MDS_MAXREQSIZE / 3)
1764                         RETURN(-E2BIG);
1765
1766                 OBD_ALLOC_LARGE(hur, totalsize);
1767                 if (hur == NULL)
1768                         RETURN(-ENOMEM);
1769
1770                 /* Copy the whole struct */
1771                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1772                         GOTO(out_hur, rc = -EFAULT);
1773
1774                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1775                         const struct lu_fid *fid;
1776                         struct inode *f;
1777                         int i;
1778
1779                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1780                                 fid = &hur->hur_user_item[i].hui_fid;
1781                                 f = search_inode_for_lustre(inode->i_sb, fid);
1782                                 if (IS_ERR(f)) {
1783                                         rc = PTR_ERR(f);
1784                                         break;
1785                                 }
1786
1787                                 rc = ll_hsm_release(f);
1788                                 iput(f);
1789                                 if (rc != 0)
1790                                         break;
1791                         }
1792                 } else {
1793                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1794                                            hur, NULL);
1795                 }
1796
1797 out_hur:
1798                 OBD_FREE_LARGE(hur, totalsize);
1799
1800                 RETURN(rc);
1801         }
1802         case LL_IOC_HSM_PROGRESS: {
1803                 struct hsm_progress_kernel      hpk;
1804                 struct hsm_progress             hp;
1805
1806                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1807                         RETURN(-EFAULT);
1808
1809                 hpk.hpk_fid = hp.hp_fid;
1810                 hpk.hpk_cookie = hp.hp_cookie;
1811                 hpk.hpk_extent = hp.hp_extent;
1812                 hpk.hpk_flags = hp.hp_flags;
1813                 hpk.hpk_errval = hp.hp_errval;
1814                 hpk.hpk_data_version = 0;
1815
1816                 /* File may not exist in Lustre; all progress
1817                  * reported to Lustre root */
1818                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1819                                    NULL);
1820                 RETURN(rc);
1821         }
1822         case LL_IOC_HSM_CT_START:
1823                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1824                         RETURN(-EPERM);
1825
1826                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
1827                                        (struct lustre_kernelcomm __user *)arg);
1828                 RETURN(rc);
1829
1830         case LL_IOC_HSM_COPY_START: {
1831                 struct hsm_copy *copy;
1832                 int              rc;
1833
1834                 OBD_ALLOC_PTR(copy);
1835                 if (copy == NULL)
1836                         RETURN(-ENOMEM);
1837                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1838                         OBD_FREE_PTR(copy);
1839                         RETURN(-EFAULT);
1840                 }
1841
1842                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1843                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1844                         rc = -EFAULT;
1845
1846                 OBD_FREE_PTR(copy);
1847                 RETURN(rc);
1848         }
1849         case LL_IOC_HSM_COPY_END: {
1850                 struct hsm_copy *copy;
1851                 int              rc;
1852
1853                 OBD_ALLOC_PTR(copy);
1854                 if (copy == NULL)
1855                         RETURN(-ENOMEM);
1856                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1857                         OBD_FREE_PTR(copy);
1858                         RETURN(-EFAULT);
1859                 }
1860
1861                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1862                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1863                         rc = -EFAULT;
1864
1865                 OBD_FREE_PTR(copy);
1866                 RETURN(rc);
1867         }
1868         case LL_IOC_MIGRATE: {
1869                 struct lmv_user_md *lum;
1870                 char *buf = NULL;
1871                 int len;
1872                 char *filename;
1873                 int namelen = 0;
1874                 int rc;
1875
1876                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1877                 if (rc)
1878                         RETURN(rc);
1879
1880                 data = (struct obd_ioctl_data *)buf;
1881                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1882                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1883                         GOTO(migrate_free, rc = -EINVAL);
1884
1885                 filename = data->ioc_inlbuf1;
1886                 namelen = data->ioc_inllen1;
1887
1888                 if (namelen < 1 || namelen != strlen(filename) + 1) {
1889                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1890                         GOTO(migrate_free, rc = -EINVAL);
1891                 }
1892
1893                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1894                 if (lum->lum_magic != LMV_USER_MAGIC &&
1895                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
1896                         rc = -EINVAL;
1897                         CERROR("%s: wrong lum magic %x: rc = %d\n",
1898                                filename, lum->lum_magic, rc);
1899                         GOTO(migrate_free, rc);
1900                 }
1901
1902                 rc = ll_migrate(inode, file, lum, filename);
1903 migrate_free:
1904                 OBD_FREE_LARGE(buf, len);
1905
1906                 RETURN(rc);
1907         }
1908         case LL_IOC_FSGETXATTR:
1909                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
1910         case LL_IOC_FSSETXATTR:
1911                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
1912         default:
1913                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
1914                                      (void __user *)arg));
1915         }
1916 }
1917
1918 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
1919 {
1920         struct inode *inode = file->f_mapping->host;
1921         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
1922         struct ll_sb_info *sbi = ll_i2sbi(inode);
1923         int api32 = ll_need_32bit_api(sbi);
1924         loff_t ret = -EINVAL;
1925         ENTRY;
1926
1927         inode_lock(inode);
1928         switch (origin) {
1929                 case SEEK_SET:
1930                         break;
1931                 case SEEK_CUR:
1932                         offset += file->f_pos;
1933                         break;
1934                 case SEEK_END:
1935                         if (offset > 0)
1936                                 GOTO(out, ret);
1937                         if (api32)
1938                                 offset += LL_DIR_END_OFF_32BIT;
1939                         else
1940                                 offset += LL_DIR_END_OFF;
1941                         break;
1942                 default:
1943                         GOTO(out, ret);
1944         }
1945
1946         if (offset >= 0 &&
1947             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
1948              (!api32 && offset <= LL_DIR_END_OFF))) {
1949                 if (offset != file->f_pos) {
1950                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
1951                             (!api32 && offset == LL_DIR_END_OFF))
1952                                 fd->lfd_pos = MDS_DIR_END_OFF;
1953                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
1954                                 fd->lfd_pos = offset << 32;
1955                         else
1956                                 fd->lfd_pos = offset;
1957                         file->f_pos = offset;
1958                         file->f_version = 0;
1959                 }
1960                 ret = offset;
1961         }
1962         GOTO(out, ret);
1963
1964 out:
1965         inode_unlock(inode);
1966         return ret;
1967 }
1968
1969 static int ll_dir_open(struct inode *inode, struct file *file)
1970 {
1971         ENTRY;
1972         RETURN(ll_file_open(inode, file));
1973 }
1974
1975 static int ll_dir_release(struct inode *inode, struct file *file)
1976 {
1977         ENTRY;
1978         RETURN(ll_file_release(inode, file));
1979 }
1980
1981 const struct file_operations ll_dir_operations = {
1982         .llseek         = ll_dir_seek,
1983         .open           = ll_dir_open,
1984         .release        = ll_dir_release,
1985         .read           = generic_read_dir,
1986 #ifdef HAVE_DIR_CONTEXT
1987         .iterate        = ll_iterate,
1988 #else
1989         .readdir        = ll_readdir,
1990 #endif
1991         .unlocked_ioctl = ll_dir_ioctl,
1992         .fsync          = ll_fsync,
1993 };