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                 /*
 346                  * This is only needed for striped dir to fill ..,
 347                  * see lmv_read_page()
 348                  */
 349                 if (file_dentry(filp)->d_parent != NULL &&
 350                     file_dentry(filp)->d_parent->d_inode != NULL) {
 351                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 352                         struct inode *parent =
 353                                 file_dentry(filp)->d_parent->d_inode;
 354
 355                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 356                                 pfid = *ll_inode2fid(parent);
 357                 }
 358
 359                 /* If it can not find in cache, do lookup .. on the master
 360                  * object */
 361                 if (fid_is_zero(&pfid)) {
 362                         rc = ll_dir_get_parent_fid(inode, &pfid);
 363                         if (rc != 0)
 364                                 RETURN(rc);
 365                 }
 366         }
 367
 368         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 369                                      LUSTRE_OPC_ANY, inode);
 370         if (IS_ERR(op_data))
 371                 GOTO(out, rc = PTR_ERR(op_data));
 372
 373         /* foreign dirs are browsed out of Lustre */
 374         if (unlikely(op_data->op_mea1 != NULL &&
 375                      op_data->op_mea1->lsm_md_magic == LMV_MAGIC_FOREIGN)) {
 376                 ll_finish_md_op_data(op_data);
 377                 RETURN(-ENODATA);
 378         }
 379
 380         op_data->op_fid3 = pfid;
 381
 382 #ifdef HAVE_DIR_CONTEXT
 383         ctx->pos = pos;
 384         rc = ll_dir_read(inode, &pos, op_data, ctx);
 385         pos = ctx->pos;
 386 #else
 387         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 388 #endif
 389         if (lfd != NULL)
 390                 lfd->lfd_pos = pos;
 391
 392         if (pos == MDS_DIR_END_OFF) {
 393                 if (api32)
 394                         pos = LL_DIR_END_OFF_32BIT;
 395                 else
 396                         pos = LL_DIR_END_OFF;
 397         } else {
 398                 if (api32 && hash64)
 399                         pos = pos >> 32;
 400         }
 401 #ifdef HAVE_DIR_CONTEXT
 402         ctx->pos = pos;
 403 #else
 404         filp->f_pos = pos;
 405 #endif
 406         ll_finish_md_op_data(op_data);
 407
 408 out:
 409         if (!rc)
 410                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
 411
 412         RETURN(rc);
 413 }
 414
 415 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 416 static int ll_send_mgc_param(struct obd_export *mgc, char *string)
 417 {
 418         struct mgs_send_param *msp;
 419         int rc = 0;
 420
 421         OBD_ALLOC_PTR(msp);
 422         if (!msp)
 423                 return -ENOMEM;
 424
 425         strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
 426         rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
 427                                 sizeof(struct mgs_send_param), msp, NULL);
 428         if (rc)
 429                 CERROR("Failed to set parameter: %d\n", rc);
 430         OBD_FREE_PTR(msp);
 431
 432         return rc;
 433 }
 434 #endif
 435
 436 /**
 437  * Create striped directory with specified stripe(@lump)
 438  *
 439  * \param[in] dparent   the parent of the directory.
 440  * \param[in] lump      the specified stripes.
 441  * \param[in] dirname   the name of the directory.
 442  * \param[in] mode      the specified mode of the directory.
 443  *
 444  * \retval              =0 if striped directory is being created successfully.
 445  *                      <0 if the creation is failed.
 446  */
 447 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 448                                size_t len, const char *dirname, umode_t mode)
 449 {
 450         struct inode *parent = dparent->d_inode;
 451         struct ptlrpc_request *request = NULL;
 452         struct md_op_data *op_data;
 453         struct ll_sb_info *sbi = ll_i2sbi(parent);
 454         struct inode *inode = NULL;
 455         struct dentry dentry = {
 456                 .d_parent = dparent,
 457                 .d_name = {
 458                         .name = dirname,
 459                         .len = strlen(dirname),
 460                         .hash = ll_full_name_hash(dparent, dirname,
 461                                                   strlen(dirname)),
 462                 },
 463         };
 464         int err;
 465         ENTRY;
 466
 467         if (unlikely(!lmv_magic_supported(lump->lum_magic)))
 468                 RETURN(-EINVAL);
 469
 470         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 471                 CDEBUG(D_VFSTRACE,
 472                        "VFS Op:inode="DFID"(%p) name %s stripe_offset %d, stripe_count: %u\n",
 473                        PFID(ll_inode2fid(parent)), parent, dirname,
 474                        (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 475         } else {
 476                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 477
 478                 CDEBUG(D_VFSTRACE,
 479                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 480                        PFID(ll_inode2fid(parent)), parent, dirname,
 481                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 482         }
 483
 484         if (lump->lum_stripe_count > 1 &&
 485             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 486                 RETURN(-EINVAL);
 487
 488         if (IS_DEADDIR(parent) &&
 489             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 490                 RETURN(-ENOENT);
 491
 492         if (unlikely(!lmv_magic_supported(cpu_to_le32(lump->lum_magic))))
 493                 lustre_swab_lmv_user_md(lump);
 494
 495         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 496                 mode &= ~current_umask();
 497         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 498         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 499                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 500                                      lump);
 501         if (IS_ERR(op_data))
 502                 RETURN(PTR_ERR(op_data));
 503
 504         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 505                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 506                  * to determine the security context for the file. So our fake
 507                  * dentry should be real enough for this purpose. */
 508                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 509                                               &op_data->op_file_secctx_name,
 510                                               &op_data->op_file_secctx,
 511                                               &op_data->op_file_secctx_size);
 512                 if (err < 0)
 513                         GOTO(out_op_data, err);
 514         }
 515
 516         op_data->op_cli_flags |= CLI_SET_MEA;
 517         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 518                         from_kuid(&init_user_ns, current_fsuid()),
 519                         from_kgid(&init_user_ns, current_fsgid()),
 520                         cfs_curproc_cap_pack(), 0, &request);
 521         if (err)
 522                 GOTO(out_request, err);
 523
 524         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 525
 526         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 527         if (err)
 528                 GOTO(out_inode, err);
 529
 530         dentry.d_inode = inode;
 531
 532         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 533                 inode_lock(inode);
 534                 err = security_inode_notifysecctx(inode,
 535                                                   op_data->op_file_secctx,
 536                                                   op_data->op_file_secctx_size);
 537                 inode_unlock(inode);
 538         } else {
 539                 err = ll_inode_init_security(&dentry, inode, parent);
 540         }
 541         if (err)
 542                 GOTO(out_inode, err);
 543
 544 out_inode:
 545         if (inode != NULL)
 546                 iput(inode);
 547 out_request:
 548         ptlrpc_req_finished(request);
 549 out_op_data:
 550         ll_finish_md_op_data(op_data);
 551
 552         return err;
 553 }
 554
 555 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 556                      int set_default)
 557 {
 558         struct ll_sb_info *sbi = ll_i2sbi(inode);
 559         struct md_op_data *op_data;
 560         struct ptlrpc_request *req = NULL;
 561         int rc = 0;
 562 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 563         struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
 564         struct obd_device *mgc = lsi->lsi_mgc;
 565 #endif
 566         int lum_size;
 567         ENTRY;
 568
 569         if (lump != NULL) {
 570                 /*
 571                  * This is coming from userspace, so should be in
 572                  * local endian.  But the MDS would like it in little
 573                  * endian, so we swab it before we send it.
 574                  */
 575                 switch (lump->lmm_magic) {
 576                 case LOV_USER_MAGIC_V1: {
 577                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
 578                                 lustre_swab_lov_user_md_v1(lump);
 579                         lum_size = sizeof(struct lov_user_md_v1);
 580                         break;
 581                 }
 582                 case LOV_USER_MAGIC_V3: {
 583                         if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
 584                                 lustre_swab_lov_user_md_v3(
 585                                         (struct lov_user_md_v3 *)lump);
 586                         lum_size = sizeof(struct lov_user_md_v3);
 587                         break;
 588                 }
 589                 case LOV_USER_MAGIC_COMP_V1: {
 590                         if (lump->lmm_magic !=
 591                             cpu_to_le32(LOV_USER_MAGIC_COMP_V1))
 592                                 lustre_swab_lov_comp_md_v1(
 593                                         (struct lov_comp_md_v1 *)lump);
 594                         lum_size = le32_to_cpu(
 595                                 ((struct lov_comp_md_v1 *)lump)->lcm_size);
 596                         break;
 597                 }
 598                 case LMV_USER_MAGIC: {
 599                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 600                                 lustre_swab_lmv_user_md(
 601                                         (struct lmv_user_md *)lump);
 602                         lum_size = sizeof(struct lmv_user_md);
 603                         break;
 604                 }
 605                 case LOV_USER_MAGIC_SPECIFIC: {
 606                         struct lov_user_md_v3 *v3 =
 607                                         (struct lov_user_md_v3 *)lump;
 608                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 609                                 RETURN(-EINVAL);
 610                         if (lump->lmm_magic !=
 611                             cpu_to_le32(LOV_USER_MAGIC_SPECIFIC)) {
 612                                 lustre_swab_lov_user_md_v3(v3);
 613                                 lustre_swab_lov_user_md_objects(v3->lmm_objects,
 614                                                 v3->lmm_stripe_count);
 615                         }
 616                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 617                                                     LOV_USER_MAGIC_SPECIFIC);
 618                         break;
 619                 }
 620                 default: {
 621                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 622                                         " %#08x != %#08x nor %#08x\n",
 623                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 624                                         LOV_USER_MAGIC_V3);
 625                         RETURN(-EINVAL);
 626                 }
 627                 }
 628         } else {
 629                 lum_size = sizeof(struct lov_user_md_v1);
 630         }
 631
 632         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 633                                      LUSTRE_OPC_ANY, NULL);
 634         if (IS_ERR(op_data))
 635                 RETURN(PTR_ERR(op_data));
 636
 637         /* swabbing is done in lov_setstripe() on server side */
 638         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 639         ll_finish_md_op_data(op_data);
 640         ptlrpc_req_finished(req);
 641         if (rc)
 642                 RETURN(rc);
 643
 644 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 13, 53, 0)
 645         /*
 646          * 2.9 server has stored filesystem default stripe in ROOT xattr,
 647          * and it's stored into system config for backward compatibility.
 648          *
 649          * In the following we use the fact that LOV_USER_MAGIC_V1 and
 650          * LOV_USER_MAGIC_V3 have the same initial fields so we do not
 651          * need the make the distiction between the 2 versions
 652          */
 653         if (set_default && mgc->u.cli.cl_mgc_mgsexp &&
 654             (lump == NULL ||
 655              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V1 ||
 656              le32_to_cpu(lump->lmm_magic) == LOV_USER_MAGIC_V3)) {
 657                 char *param = NULL;
 658                 char *buf;
 659
 660                 OBD_ALLOC(param, MGS_PARAM_MAXLEN);
 661                 if (param == NULL)
 662                         GOTO(end, rc = -ENOMEM);
 663
 664                 buf = param;
 665                 /* Get fsname and assume devname to be -MDT0000. */
 666                 snprintf(buf, MGS_PARAM_MAXLEN, "%s-MDT0000.lov",
 667                          sbi->ll_fsname);
 668                 buf += strlen(buf);
 669
 670                 /* Set root stripesize */
 671                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripesize=%u",
 672                          lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
 673                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 674                 if (rc)
 675                         GOTO(end, rc);
 676
 677                 /* Set root stripecount */
 678                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripecount=%hd",
 679                          lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
 680                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 681                 if (rc)
 682                         GOTO(end, rc);
 683
 684                 /* Set root stripeoffset */
 685                 snprintf(buf, MGS_PARAM_MAXLEN, ".stripeoffset=%hd",
 686                          lump ? le16_to_cpu(lump->lmm_stripe_offset) :
 687                                 (typeof(lump->lmm_stripe_offset))(-1));
 688                 rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
 689
 690 end:
 691                 if (param != NULL)
 692                         OBD_FREE(param, MGS_PARAM_MAXLEN);
 693         }
 694 #endif
 695         RETURN(rc);
 696 }
 697
 698 /**
 699  * This function will be used to get default LOV/LMV/Default LMV
 700  * @valid will be used to indicate which stripe it will retrieve
 701  *      OBD_MD_MEA              LMV stripe EA
 702  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 703  *      otherwise               Default LOV EA.
 704  * Each time, it can only retrieve 1 stripe EA
 705  **/
 706 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 707                      struct ptlrpc_request **request, u64 valid)
 708 {
 709         struct ll_sb_info *sbi = ll_i2sbi(inode);
 710         struct mdt_body   *body;
 711         struct lov_mds_md *lmm = NULL;
 712         struct ptlrpc_request *req = NULL;
 713         int rc, lmm_size;
 714         struct md_op_data *op_data;
 715         ENTRY;
 716
 717         rc = ll_get_default_mdsize(sbi, &lmm_size);
 718         if (rc)
 719                 RETURN(rc);
 720
 721         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 722                                      0, lmm_size, LUSTRE_OPC_ANY,
 723                                      NULL);
 724         if (IS_ERR(op_data))
 725                 RETURN(PTR_ERR(op_data));
 726
 727         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 728         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 729         ll_finish_md_op_data(op_data);
 730         if (rc < 0) {
 731                 CDEBUG(D_INFO, "md_getattr failed on inode "
 732                        DFID": rc %d\n", PFID(ll_inode2fid(inode)), rc);
 733                 GOTO(out, rc);
 734         }
 735
 736         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 737         LASSERT(body != NULL);
 738
 739         lmm_size = body->mbo_eadatasize;
 740
 741         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 742             lmm_size == 0) {
 743                 GOTO(out, rc = -ENODATA);
 744         }
 745
 746         lmm = req_capsule_server_sized_get(&req->rq_pill,
 747                                            &RMF_MDT_MD, lmm_size);
 748         LASSERT(lmm != NULL);
 749
 750         /*
 751          * This is coming from the MDS, so is probably in
 752          * little endian.  We convert it to host endian before
 753          * passing it to userspace.
 754          */
 755         /* We don't swab objects for directories */
 756         switch (le32_to_cpu(lmm->lmm_magic)) {
 757         case LOV_MAGIC_V1:
 758                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 759                         lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
 760                 break;
 761         case LOV_MAGIC_V3:
 762                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 763                         lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
 764                 break;
 765         case LOV_MAGIC_COMP_V1:
 766                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 767                         lustre_swab_lov_comp_md_v1(
 768                                         (struct lov_comp_md_v1 *)lmm);
 769                 break;
 770         case LMV_MAGIC_V1:
 771                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 772                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 773                 break;
 774         case LMV_USER_MAGIC:
 775                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 776                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 777                 break;
 778         case LOV_USER_MAGIC_SPECIFIC: {
 779                 struct lov_user_md_v3 *v3 = (struct lov_user_md_v3 *)lmm;
 780
 781                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC)) {
 782                         lustre_swab_lov_user_md_v3(v3);
 783                         lustre_swab_lov_user_md_objects(v3->lmm_objects,
 784                                                         v3->lmm_stripe_count);
 785                         }
 786                 }
 787                 break;
 788         case LMV_MAGIC_FOREIGN: {
 789                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 790
 791                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 792                         __swab32s(&lfm->lfm_magic);
 793                         __swab32s(&lfm->lfm_length);
 794                         __swab32s(&lfm->lfm_type);
 795                         __swab32s(&lfm->lfm_flags);
 796                 }
 797                 break;
 798         }
 799         default:
 800                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 801                 rc = -EPROTO;
 802         }
 803 out:
 804         *plmm = lmm;
 805         *plmm_size = lmm_size;
 806         *request = req;
 807         return rc;
 808 }
 809
 810 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 811 {
 812         struct md_op_data       *op_data;
 813         int                     rc;
 814         int                     mdt_index;
 815         ENTRY;
 816
 817         OBD_ALLOC_PTR(op_data);
 818         if (op_data == NULL)
 819                 RETURN(-ENOMEM);
 820
 821         op_data->op_flags |= MF_GET_MDT_IDX;
 822         op_data->op_fid1 = *fid;
 823         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 824         mdt_index = op_data->op_mds;
 825         OBD_FREE_PTR(op_data);
 826         if (rc < 0)
 827                 RETURN(rc);
 828
 829         RETURN(mdt_index);
 830 }
 831
 832 /*
 833  *  Get MDT index for the inode.
 834  */
 835 int ll_get_mdt_idx(struct inode *inode)
 836 {
 837         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 838 }
 839
 840 /**
 841  * Generic handler to do any pre-copy work.
 842  *
 843  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 844  * first information for it that real work has started.
 845  *
 846  * Moreover, for a ARCHIVE request, it will sample the file data version and
 847  * store it in \a copy.
 848  *
 849  * \return 0 on success.
 850  */
 851 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 852 {
 853         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 854         struct hsm_progress_kernel       hpk;
 855         int                              rc = 0;
 856         int                              rc2;
 857         ENTRY;
 858
 859         /* Forge a hsm_progress based on data from copy. */
 860         hpk.hpk_fid = copy->hc_hai.hai_fid;
 861         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 862         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 863         hpk.hpk_extent.length = 0;
 864         hpk.hpk_flags = 0;
 865         hpk.hpk_errval = 0;
 866         hpk.hpk_data_version = 0;
 867
 868
 869         /* For archive request, we need to read the current file version. */
 870         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 871                 struct inode    *inode;
 872                 __u64            data_version = 0;
 873
 874                 /* Get inode for this fid */
 875                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 876                 if (IS_ERR(inode)) {
 877                         hpk.hpk_flags |= HP_FLAG_RETRY;
 878                         /* hpk_errval is >= 0 */
 879                         hpk.hpk_errval = -PTR_ERR(inode);
 880                         GOTO(progress, rc = PTR_ERR(inode));
 881                 }
 882
 883                 /* Read current file data version */
 884                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 885                 iput(inode);
 886                 if (rc != 0) {
 887                         CDEBUG(D_HSM, "Could not read file data version of "
 888                                       DFID" (rc = %d). Archive request ("
 889                                       "%#llx) could not be done.\n",
 890                                       PFID(&copy->hc_hai.hai_fid), rc,
 891                                       copy->hc_hai.hai_cookie);
 892                         hpk.hpk_flags |= HP_FLAG_RETRY;
 893                         /* hpk_errval must be >= 0 */
 894                         hpk.hpk_errval = -rc;
 895                         GOTO(progress, rc);
 896                 }
 897
 898                 /* Store in the hsm_copy for later copytool use.
 899                  * Always modified even if no lsm. */
 900                 copy->hc_data_version = data_version;
 901         }
 902
 903 progress:
 904         /* On error, the request should be considered as completed */
 905         if (hpk.hpk_errval > 0)
 906                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 907
 908         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 909                             &hpk, NULL);
 910
 911         /* Return first error */
 912         RETURN(rc != 0 ? rc : rc2);
 913 }
 914
 915 /**
 916  * Generic handler to do any post-copy work.
 917  *
 918  * It will send the last hsm_progress update to coordinator to inform it
 919  * that copy is finished and whether it was successful or not.
 920  *
 921  * Moreover,
 922  * - for ARCHIVE request, it will sample the file data version and compare it
 923  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 924  *   will be considered as failed.
 925  * - for RESTORE request, it will sample the file data version and send it to
 926  *   coordinator which is useful if the file was imported as 'released'.
 927  *
 928  * \return 0 on success.
 929  */
 930 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 931 {
 932         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 933         struct hsm_progress_kernel       hpk;
 934         int                              rc = 0;
 935         int                              rc2;
 936         ENTRY;
 937
 938         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 939         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 940          * initialized if copy_end was called with copy == NULL.
 941          */
 942
 943         /* Forge a hsm_progress based on data from copy. */
 944         hpk.hpk_fid = copy->hc_hai.hai_fid;
 945         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 946         hpk.hpk_extent = copy->hc_hai.hai_extent;
 947         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 948         hpk.hpk_errval = copy->hc_errval;
 949         hpk.hpk_data_version = 0;
 950
 951         /* For archive request, we need to check the file data was not changed.
 952          *
 953          * For restore request, we need to send the file data version, this is
 954          * useful when the file was created using hsm_import.
 955          */
 956         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 957              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 958             (copy->hc_errval == 0)) {
 959                 struct inode    *inode;
 960                 __u64            data_version = 0;
 961
 962                 /* Get lsm for this fid */
 963                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 964                 if (IS_ERR(inode)) {
 965                         hpk.hpk_flags |= HP_FLAG_RETRY;
 966                         /* hpk_errval must be >= 0 */
 967                         hpk.hpk_errval = -PTR_ERR(inode);
 968                         GOTO(progress, rc = PTR_ERR(inode));
 969                 }
 970
 971                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 972                 iput(inode);
 973                 if (rc) {
 974                         CDEBUG(D_HSM, "Could not read file data version. "
 975                                       "Request could not be confirmed.\n");
 976                         if (hpk.hpk_errval == 0)
 977                                 hpk.hpk_errval = -rc;
 978                         GOTO(progress, rc);
 979                 }
 980
 981                 /* Store in the hsm_copy for later copytool use.
 982                  * Always modified even if no lsm. */
 983                 hpk.hpk_data_version = data_version;
 984
 985                 /* File could have been stripped during archiving, so we need
 986                  * to check anyway. */
 987                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 988                     (copy->hc_data_version != data_version)) {
 989                         CDEBUG(D_HSM, "File data version mismatched. "
 990                               "File content was changed during archiving. "
 991                                DFID", start:%#llx current:%#llx\n",
 992                                PFID(&copy->hc_hai.hai_fid),
 993                                copy->hc_data_version, data_version);
 994                         /* File was changed, send error to cdt. Do not ask for
 995                          * retry because if a file is modified frequently,
 996                          * the cdt will loop on retried archive requests.
 997                          * The policy engine will ask for a new archive later
 998                          * when the file will not be modified for some tunable
 999                          * time */
1000                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
1001                         rc = -EBUSY;
1002                         /* hpk_errval must be >= 0 */
1003                         hpk.hpk_errval = -rc;
1004                         GOTO(progress, rc);
1005                 }
1006
1007         }
1008
1009 progress:
1010         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
1011                             &hpk, NULL);
1012
1013         /* Return first error */
1014         RETURN(rc != 0 ? rc : rc2);
1015 }
1016
1017
1018 static int copy_and_ct_start(int cmd, struct obd_export *exp,
1019                              const struct lustre_kernelcomm __user *data)
1020 {
1021         struct lustre_kernelcomm *lk;
1022         struct lustre_kernelcomm *tmp;
1023         size_t size = sizeof(*lk);
1024         size_t new_size;
1025         int i;
1026         int rc;
1027
1028         /* copy data from userspace to get numbers of archive_id */
1029         OBD_ALLOC(lk, size);
1030         if (lk == NULL)
1031                 return -ENOMEM;
1032
1033         if (copy_from_user(lk, data, size))
1034                 GOTO(out_lk, rc = -EFAULT);
1035
1036         if (lk->lk_flags & LK_FLG_STOP)
1037                 goto do_ioctl;
1038
1039         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1040                 __u32 archive_mask = lk->lk_data_count;
1041                 int count;
1042
1043                 /* old hsm agent to old MDS */
1044                 if (!exp_connect_archive_id_array(exp))
1045                         goto do_ioctl;
1046
1047                 /* old hsm agent to new MDS */
1048                 lk->lk_flags |= LK_FLG_DATANR;
1049
1050                 if (archive_mask == 0)
1051                         goto do_ioctl;
1052
1053                 count = hweight32(archive_mask);
1054                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1055                 OBD_ALLOC(tmp, new_size);
1056                 if (tmp == NULL)
1057                         GOTO(out_lk, rc = -ENOMEM);
1058
1059                 memcpy(tmp, lk, size);
1060                 tmp->lk_data_count = count;
1061                 OBD_FREE(lk, size);
1062                 lk = tmp;
1063                 size = new_size;
1064
1065                 count = 0;
1066                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1067                         if ((1 << i) & archive_mask) {
1068                                 lk->lk_data[count] = i + 1;
1069                                 count++;
1070                         }
1071                 }
1072                 goto do_ioctl;
1073         }
1074
1075         /* new hsm agent to new mds */
1076         if (lk->lk_data_count > 0) {
1077                 new_size = offsetof(struct lustre_kernelcomm,
1078                                     lk_data[lk->lk_data_count]);
1079                 OBD_ALLOC(tmp, new_size);
1080                 if (tmp == NULL)
1081                         GOTO(out_lk, rc = -ENOMEM);
1082
1083                 OBD_FREE(lk, size);
1084                 lk = tmp;
1085                 size = new_size;
1086
1087                 if (copy_from_user(lk, data, size))
1088                         GOTO(out_lk, rc = -EFAULT);
1089         }
1090
1091         /* new hsm agent to old MDS */
1092         if (!exp_connect_archive_id_array(exp)) {
1093                 __u32 archives = 0;
1094
1095                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1096                         GOTO(out_lk, rc = -EINVAL);
1097
1098                 for (i = 0; i < lk->lk_data_count; i++) {
1099                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1100                                 rc = -EINVAL;
1101                                 CERROR("%s: archive id %d requested but only "
1102                                        "[0 - %zu] supported: rc = %d\n",
1103                                        exp->exp_obd->obd_name, lk->lk_data[i],
1104                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1105                                 GOTO(out_lk, rc);
1106                         }
1107
1108                         if (lk->lk_data[i] == 0) {
1109                                 archives = 0;
1110                                 break;
1111                         }
1112
1113                         archives |= (1 << (lk->lk_data[i] - 1));
1114                 }
1115                 lk->lk_flags &= ~LK_FLG_DATANR;
1116                 lk->lk_data_count = archives;
1117         }
1118 do_ioctl:
1119         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1120 out_lk:
1121         OBD_FREE(lk, size);
1122         return rc;
1123 }
1124
1125 static int check_owner(int type, int id)
1126 {
1127         switch (type) {
1128         case USRQUOTA:
1129                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1130                         return -EPERM;
1131                 break;
1132         case GRPQUOTA:
1133                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1134                         return -EPERM;
1135                 break;
1136         case PRJQUOTA:
1137                 break;
1138         }
1139         return 0;
1140 }
1141
1142 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1143 {
1144         int cmd = qctl->qc_cmd;
1145         int type = qctl->qc_type;
1146         int id = qctl->qc_id;
1147         int valid = qctl->qc_valid;
1148         int rc = 0;
1149         ENTRY;
1150
1151         switch (cmd) {
1152         case Q_SETQUOTA:
1153         case Q_SETINFO:
1154         case LUSTRE_Q_SETDEFAULT:
1155                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1156                         RETURN(-EPERM);
1157                 break;
1158         case Q_GETQUOTA:
1159         case LUSTRE_Q_GETDEFAULT:
1160                 if (check_owner(type, id) &&
1161                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1162                         RETURN(-EPERM);
1163                 break;
1164         case Q_GETINFO:
1165                 break;
1166         default:
1167                 CERROR("unsupported quotactl op: %#x\n", cmd);
1168                 RETURN(-ENOTSUPP);
1169         }
1170
1171         if (valid != QC_GENERAL) {
1172                 if (cmd == Q_GETINFO)
1173                         qctl->qc_cmd = Q_GETOINFO;
1174                 else if (cmd == Q_GETQUOTA)
1175                         qctl->qc_cmd = Q_GETOQUOTA;
1176                 else
1177                         RETURN(-EINVAL);
1178
1179                 switch (valid) {
1180                 case QC_MDTIDX:
1181                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1182                                            sizeof(*qctl), qctl, NULL);
1183                         break;
1184                 case QC_OSTIDX:
1185                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1186                                            sizeof(*qctl), qctl, NULL);
1187                         break;
1188                 case QC_UUID:
1189                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1190                                            sizeof(*qctl), qctl, NULL);
1191                         if (rc == -EAGAIN)
1192                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1193                                                    sbi->ll_dt_exp,
1194                                                    sizeof(*qctl), qctl, NULL);
1195                         break;
1196                 default:
1197                         rc = -EINVAL;
1198                         break;
1199                 }
1200
1201                 if (rc)
1202                         RETURN(rc);
1203
1204                 qctl->qc_cmd = cmd;
1205         } else {
1206                 struct obd_quotactl *oqctl;
1207
1208                 OBD_ALLOC_PTR(oqctl);
1209                 if (oqctl == NULL)
1210                         RETURN(-ENOMEM);
1211
1212                 QCTL_COPY(oqctl, qctl);
1213                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1214                 if (rc) {
1215                         OBD_FREE_PTR(oqctl);
1216                         RETURN(rc);
1217                 }
1218                 /* If QIF_SPACE is not set, client should collect the
1219                  * space usage from OSSs by itself */
1220                 if (cmd == Q_GETQUOTA &&
1221                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1222                     !oqctl->qc_dqblk.dqb_curspace) {
1223                         struct obd_quotactl *oqctl_tmp;
1224
1225                         OBD_ALLOC_PTR(oqctl_tmp);
1226                         if (oqctl_tmp == NULL)
1227                                 GOTO(out, rc = -ENOMEM);
1228
1229                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
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_dqblk.dqb_curspace = 0;
1244                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1245                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1246                         if (!rc || rc == -EREMOTEIO) {
1247                                 oqctl->qc_dqblk.dqb_curspace +=
1248                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1249                                 oqctl->qc_dqblk.dqb_curinodes =
1250                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1251                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1252                         } else {
1253                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1254                         }
1255
1256                         OBD_FREE_PTR(oqctl_tmp);
1257                 }
1258 out:
1259                 QCTL_COPY(qctl, oqctl);
1260                 OBD_FREE_PTR(oqctl);
1261         }
1262
1263         RETURN(rc);
1264 }
1265
1266 /* This function tries to get a single name component,
1267  * to send to the server. No actual path traversal involved,
1268  * so we limit to NAME_MAX */
1269 static char *ll_getname(const char __user *filename)
1270 {
1271         int ret = 0, len;
1272         char *tmp;
1273
1274         OBD_ALLOC(tmp, NAME_MAX + 1);
1275
1276         if (!tmp)
1277                 return ERR_PTR(-ENOMEM);
1278
1279         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1280         if (len < 0)
1281                 ret = -ENOENT;
1282         else if (len > NAME_MAX)
1283                 ret = -ENAMETOOLONG;
1284
1285         if (ret) {
1286                 OBD_FREE(tmp, NAME_MAX + 1);
1287                 tmp =  ERR_PTR(ret);
1288         }
1289         return tmp;
1290 }
1291
1292 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1293
1294 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1295 {
1296         struct dentry *dentry = file_dentry(file);
1297         struct inode *inode = file_inode(file);
1298         struct ll_sb_info *sbi = ll_i2sbi(inode);
1299         struct obd_ioctl_data *data;
1300         int rc = 0;
1301         ENTRY;
1302
1303         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1304                PFID(ll_inode2fid(inode)), inode, cmd);
1305
1306         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1307         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1308                 return -ENOTTY;
1309
1310         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1311         switch (cmd) {
1312         case FS_IOC_GETFLAGS:
1313         case FS_IOC_SETFLAGS:
1314                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1315         case FSFILT_IOC_GETVERSION:
1316         case FS_IOC_GETVERSION:
1317                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1318         /* We need to special case any other ioctls we want to handle,
1319          * to send them to the MDS/OST as appropriate and to properly
1320          * network encode the arg field. */
1321         case FS_IOC_SETVERSION:
1322                 RETURN(-ENOTSUPP);
1323
1324         case LL_IOC_GET_MDTIDX: {
1325                 int mdtidx;
1326
1327                 mdtidx = ll_get_mdt_idx(inode);
1328                 if (mdtidx < 0)
1329                         RETURN(mdtidx);
1330
1331                 if (put_user((int)mdtidx, (int __user *)arg))
1332                         RETURN(-EFAULT);
1333
1334                 return 0;
1335         }
1336         case IOC_MDC_LOOKUP: {
1337                                      int namelen, len = 0;
1338                 char *buf = NULL;
1339                 char *filename;
1340
1341                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1342                 if (rc != 0)
1343                         RETURN(rc);
1344                 data = (void *)buf;
1345
1346                 filename = data->ioc_inlbuf1;
1347                 namelen = strlen(filename);
1348                 if (namelen < 1) {
1349                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1350                         GOTO(out_free, rc = -EINVAL);
1351                 }
1352
1353                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1354                 if (rc < 0) {
1355                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1356                                sbi->ll_fsname, namelen, filename, rc);
1357                         GOTO(out_free, rc);
1358                 }
1359 out_free:
1360                 OBD_FREE_LARGE(buf, len);
1361                 return rc;
1362         }
1363         case LL_IOC_LMV_SETSTRIPE: {
1364                 struct lmv_user_md  *lum;
1365                 char            *buf = NULL;
1366                 char            *filename;
1367                 int              namelen = 0;
1368                 int              lumlen = 0;
1369                 umode_t          mode;
1370                 int              len;
1371                 int              rc;
1372
1373                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1374                 if (rc)
1375                         RETURN(rc);
1376
1377                 data = (void *)buf;
1378                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1379                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1380                         GOTO(lmv_out_free, rc = -EINVAL);
1381
1382                 filename = data->ioc_inlbuf1;
1383                 namelen = data->ioc_inllen1;
1384
1385                 if (namelen < 1) {
1386                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1387                         GOTO(lmv_out_free, rc = -EINVAL);
1388                 }
1389                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1390                 lumlen = data->ioc_inllen2;
1391
1392                 if (!lmv_magic_supported(lum->lum_magic)) {
1393                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
1394                                lum->lum_magic, -EINVAL);
1395                         GOTO(lmv_out_free, rc = -EINVAL);
1396                 }
1397
1398                 if ((lum->lum_magic == LMV_USER_MAGIC ||
1399                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
1400                     lumlen < sizeof(*lum)) {
1401                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
1402                                filename, lumlen, lum->lum_magic, -EINVAL);
1403                         GOTO(lmv_out_free, rc = -EINVAL);
1404                 }
1405
1406                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
1407                     lumlen < sizeof(struct lmv_foreign_md)) {
1408                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1409                                filename, lum->lum_magic, lumlen, -EFAULT);
1410                         GOTO(lmv_out_free, rc = -EINVAL);
1411                 }
1412
1413 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 50, 0)
1414                 mode = data->ioc_type != 0 ? data->ioc_type : S_IRWXUGO;
1415 #else
1416                 mode = data->ioc_type;
1417 #endif
1418                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1419 lmv_out_free:
1420                 OBD_FREE_LARGE(buf, len);
1421                 RETURN(rc);
1422
1423         }
1424         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1425                 struct lmv_user_md        lum;
1426                 struct lmv_user_md __user *ulump =
1427                                         (struct lmv_user_md __user *)arg;
1428                 int                       rc;
1429
1430                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1431                         RETURN(-EFAULT);
1432
1433                 if (lum.lum_magic != LMV_USER_MAGIC)
1434                         RETURN(-EINVAL);
1435
1436                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1437
1438                 RETURN(rc);
1439         }
1440         case LL_IOC_LOV_SETSTRIPE_NEW:
1441         case LL_IOC_LOV_SETSTRIPE: {
1442                 struct lov_user_md_v3 *lumv3 = NULL;
1443                 struct lov_user_md_v1 lumv1;
1444                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1445                 struct lov_user_md_v1 __user *lumv1p =
1446                         (struct lov_user_md_v1 __user *)arg;
1447                 struct lov_user_md_v3 __user *lumv3p =
1448                         (struct lov_user_md_v3 __user *)arg;
1449                 int lum_size = 0;
1450
1451                 int set_default = 0;
1452
1453                 CLASSERT(sizeof(struct lov_user_md_v3) >
1454                          sizeof(struct lov_comp_md_v1));
1455                 CLASSERT(sizeof(*lumv3) == sizeof(*lumv3p));
1456                 /* first try with v1 which is smaller than v3 */
1457                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1458                         RETURN(-EFAULT);
1459
1460                 if (inode->i_sb->s_root == file_dentry(file))
1461                         set_default = 1;
1462
1463                 switch (lumv1.lmm_magic) {
1464                 case LOV_USER_MAGIC_V3:
1465                 case LOV_USER_MAGIC_SPECIFIC:
1466                         lum_size = ll_lov_user_md_size(&lumv1);
1467                         if (lum_size < 0)
1468                                 RETURN(lum_size);
1469                         OBD_ALLOC(lumv3, lum_size);
1470                         if (!lumv3)
1471                                 RETURN(-ENOMEM);
1472                         if (copy_from_user(lumv3, lumv3p, lum_size))
1473                                 GOTO(out, rc = -EFAULT);
1474                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1475                         break;
1476                 case LOV_USER_MAGIC_V1:
1477                         break;
1478                 default:
1479                         GOTO(out, rc = -ENOTSUPP);
1480                 }
1481
1482                 /* in v1 and v3 cases lumv1 points to data */
1483                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1484 out:
1485                 if (lumv3)
1486                         OBD_FREE(lumv3, lum_size);
1487                 RETURN(rc);
1488         }
1489         case LL_IOC_LMV_GETSTRIPE: {
1490                 struct lmv_user_md __user *ulmv =
1491                                         (struct lmv_user_md __user *)arg;
1492                 struct lmv_user_md      lum;
1493                 struct ptlrpc_request   *request = NULL;
1494                 union lmv_mds_md        *lmm = NULL;
1495                 int                     lmmsize;
1496                 u64                     valid = 0;
1497                 struct lmv_user_md      *tmp = NULL;
1498                 int                     mdt_index;
1499                 int                     lum_size;
1500                 int                     stripe_count;
1501                 int                     max_stripe_count;
1502                 int                     i;
1503                 int                     rc;
1504
1505                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1506                         RETURN(-EFAULT);
1507
1508                 max_stripe_count = lum.lum_stripe_count;
1509                 /* lum_magic will indicate which stripe the ioctl will like
1510                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1511                  * is for default LMV stripe */
1512                 if (lum.lum_magic == LMV_MAGIC_V1)
1513                         valid |= OBD_MD_MEA;
1514                 else if (lum.lum_magic == LMV_USER_MAGIC)
1515                         valid |= OBD_MD_DEFAULT_MEA;
1516                 else
1517                         RETURN(-EINVAL);
1518
1519                 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize, &request,
1520                                       valid);
1521                 if (rc != 0)
1522                         GOTO(finish_req, rc);
1523
1524                 /* Get default LMV EA */
1525                 if (lum.lum_magic == LMV_USER_MAGIC) {
1526                         if (lmmsize > sizeof(*ulmv))
1527                                 GOTO(finish_req, rc = -EINVAL);
1528
1529                         if (copy_to_user(ulmv, lmm, lmmsize))
1530                                 GOTO(finish_req, rc = -EFAULT);
1531
1532                         GOTO(finish_req, rc);
1533                 }
1534
1535                 /* if foreign LMV case, fake stripes number */
1536                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1537                         struct lmv_foreign_md *lfm;
1538
1539                         lfm = (struct lmv_foreign_md *)lmm;
1540                         if (lfm->lfm_length < XATTR_SIZE_MAX -
1541                             offsetof(typeof(*lfm), lfm_value)) {
1542                                 __u32 size = lfm->lfm_length +
1543                                              offsetof(typeof(*lfm), lfm_value);
1544
1545                                 stripe_count = lmv_foreign_to_md_stripes(size);
1546                         } else {
1547                                 CERROR("invalid %d foreign size returned\n",
1548                                             lfm->lfm_length);
1549                                 return -EINVAL;
1550                         }
1551                 } else {
1552                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
1553                 }
1554                 if (max_stripe_count < stripe_count) {
1555                         lum.lum_stripe_count = stripe_count;
1556                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1557                                 GOTO(finish_req, rc = -EFAULT);
1558                         GOTO(finish_req, rc = -E2BIG);
1559                 }
1560
1561                 /* enough room on user side and foreign case */
1562                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1563                         struct lmv_foreign_md *lfm;
1564                         __u32 size;
1565
1566                         lfm = (struct lmv_foreign_md *)lmm;
1567                         size = lfm->lfm_length +
1568                                offsetof(struct lmv_foreign_md, lfm_value);
1569                         if (copy_to_user(ulmv, lfm, size))
1570                                 GOTO(finish_req, rc = -EFAULT);
1571                         GOTO(finish_req, rc);
1572                 }
1573
1574                 lum_size = lmv_user_md_size(stripe_count,
1575                                             LMV_USER_MAGIC_SPECIFIC);
1576                 OBD_ALLOC(tmp, lum_size);
1577                 if (tmp == NULL)
1578                         GOTO(finish_req, rc = -ENOMEM);
1579
1580                 mdt_index = ll_get_mdt_idx(inode);
1581                 if (mdt_index < 0)
1582                         GOTO(out_tmp, rc = -ENOMEM);
1583
1584                 tmp->lum_magic = LMV_MAGIC_V1;
1585                 tmp->lum_stripe_count = 0;
1586                 tmp->lum_stripe_offset = mdt_index;
1587                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1588                 for (i = 0; i < stripe_count; i++) {
1589                         struct lu_fid   fid;
1590
1591                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1592                         if (fid_is_sane(&fid)) {
1593                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1594                                 if (mdt_index < 0)
1595                                         GOTO(out_tmp, rc = mdt_index);
1596
1597                                 tmp->lum_objects[i].lum_mds = mdt_index;
1598                                 tmp->lum_objects[i].lum_fid = fid;
1599                         }
1600
1601                         tmp->lum_stripe_count++;
1602                 }
1603
1604                 if (copy_to_user(ulmv, tmp, lum_size))
1605                         GOTO(out_tmp, rc = -EFAULT);
1606 out_tmp:
1607                 OBD_FREE(tmp, lum_size);
1608 finish_req:
1609                 ptlrpc_req_finished(request);
1610                 return rc;
1611         }
1612
1613         case LL_IOC_REMOVE_ENTRY: {
1614                 char            *filename = NULL;
1615                 int              namelen = 0;
1616                 int              rc;
1617
1618                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1619                  * unsupported server, which might crash the server(LU-2730),
1620                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1621                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1622                  * server will support REINT_RMENTRY XXX*/
1623                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1624                         RETURN(-ENOTSUPP);
1625
1626                 filename = ll_getname((const char __user *)arg);
1627                 if (IS_ERR(filename))
1628                         RETURN(PTR_ERR(filename));
1629
1630                 namelen = strlen(filename);
1631                 if (namelen < 1)
1632                         GOTO(out_rmdir, rc = -EINVAL);
1633
1634                 rc = ll_rmdir_entry(inode, filename, namelen);
1635 out_rmdir:
1636                 if (filename)
1637                         ll_putname(filename);
1638                 RETURN(rc);
1639         }
1640         case LL_IOC_LOV_SWAP_LAYOUTS:
1641                 RETURN(-EPERM);
1642         case IOC_OBD_STATFS:
1643                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1644         case LL_IOC_LOV_GETSTRIPE:
1645         case LL_IOC_LOV_GETSTRIPE_NEW:
1646         case LL_IOC_MDC_GETINFO:
1647         case IOC_MDC_GETFILEINFO:
1648         case IOC_MDC_GETFILESTRIPE: {
1649                 struct ptlrpc_request *request = NULL;
1650                 struct lov_user_md __user *lump;
1651                 struct lov_mds_md *lmm = NULL;
1652                 struct mdt_body *body;
1653                 char *filename = NULL;
1654                 int lmmsize;
1655
1656                 if (cmd == IOC_MDC_GETFILEINFO ||
1657                     cmd == IOC_MDC_GETFILESTRIPE) {
1658                         filename = ll_getname((const char __user *)arg);
1659                         if (IS_ERR(filename))
1660                                 RETURN(PTR_ERR(filename));
1661
1662                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1663                                                       &lmmsize, &request);
1664                 } else {
1665                         rc = ll_dir_getstripe(inode, (void **)&lmm, &lmmsize,
1666                                               &request, 0);
1667                 }
1668
1669                 if (request) {
1670                         body = req_capsule_server_get(&request->rq_pill,
1671                                                       &RMF_MDT_BODY);
1672                         LASSERT(body != NULL);
1673                 } else {
1674                         GOTO(out_req, rc);
1675                 }
1676
1677                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1678                                        cmd == LL_IOC_MDC_GETINFO)) {
1679                         lmmsize = 0;
1680                         rc = 0;
1681                 }
1682
1683                 if (rc < 0)
1684                         GOTO(out_req, rc);
1685
1686                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1687                     cmd == LL_IOC_LOV_GETSTRIPE ||
1688                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1689                         lump = (struct lov_user_md __user *)arg;
1690                 } else {
1691                         struct lov_user_mds_data __user *lmdp;
1692                         lmdp = (struct lov_user_mds_data __user *)arg;
1693                         lump = &lmdp->lmd_lmm;
1694                 }
1695
1696                 if (lmmsize == 0) {
1697                         /* If the file has no striping then zero out *lump so
1698                          * that the caller isn't confused by garbage. */
1699                         if (clear_user(lump, sizeof(*lump)))
1700                                 GOTO(out_req, rc = -EFAULT);
1701                 } else if (copy_to_user(lump, lmm, lmmsize)) {
1702                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1703                                 GOTO(out_req, rc = -EFAULT);
1704                         rc = -EOVERFLOW;
1705                 }
1706
1707                 if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
1708                         struct lov_user_mds_data __user *lmdp;
1709                         lstat_t st = { 0 };
1710
1711                         st.st_dev       = inode->i_sb->s_dev;
1712                         st.st_mode      = body->mbo_mode;
1713                         st.st_nlink     = body->mbo_nlink;
1714                         st.st_uid       = body->mbo_uid;
1715                         st.st_gid       = body->mbo_gid;
1716                         st.st_rdev      = body->mbo_rdev;
1717                         st.st_size      = body->mbo_size;
1718                         st.st_blksize   = PAGE_SIZE;
1719                         st.st_blocks    = body->mbo_blocks;
1720                         st.st_atime     = body->mbo_atime;
1721                         st.st_mtime     = body->mbo_mtime;
1722                         st.st_ctime     = body->mbo_ctime;
1723                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1724                                                 sbi->ll_flags &
1725                                                 LL_SBI_32BIT_API);
1726
1727                         lmdp = (struct lov_user_mds_data __user *)arg;
1728                         if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
1729                                 GOTO(out_req, rc = -EFAULT);
1730                 }
1731
1732                 EXIT;
1733         out_req:
1734                 ptlrpc_req_finished(request);
1735                 if (filename)
1736                         ll_putname(filename);
1737                 return rc;
1738         }
1739         case OBD_IOC_QUOTACTL: {
1740                 struct if_quotactl *qctl;
1741
1742                 OBD_ALLOC_PTR(qctl);
1743                 if (!qctl)
1744                         RETURN(-ENOMEM);
1745
1746                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1747                         GOTO(out_quotactl, rc = -EFAULT);
1748
1749                 rc = quotactl_ioctl(sbi, qctl);
1750
1751                 if (rc == 0 &&
1752                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1753                         rc = -EFAULT;
1754
1755         out_quotactl:
1756                 OBD_FREE_PTR(qctl);
1757                 RETURN(rc);
1758         }
1759         case OBD_IOC_GETDTNAME:
1760         case OBD_IOC_GETMDNAME:
1761                 RETURN(ll_get_obd_name(inode, cmd, arg));
1762         case LL_IOC_FLUSHCTX:
1763                 RETURN(ll_flush_ctx(inode));
1764         case LL_IOC_GETOBDCOUNT: {
1765                 u32 count, vallen;
1766                 struct obd_export *exp;
1767
1768                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1769                         RETURN(-EFAULT);
1770
1771                 /* get ost count when count is zero, get mdt count otherwise */
1772                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1773                 vallen = sizeof(count);
1774                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1775                                   KEY_TGT_COUNT, &vallen, &count);
1776                 if (rc) {
1777                         CERROR("get target count failed: %d\n", rc);
1778                         RETURN(rc);
1779                 }
1780
1781                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1782                         RETURN(-EFAULT);
1783
1784                 RETURN(0);
1785         }
1786         case LL_IOC_PATH2FID:
1787                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1788                                      sizeof(struct lu_fid)))
1789                         RETURN(-EFAULT);
1790                 RETURN(0);
1791         case LL_IOC_GET_CONNECT_FLAGS: {
1792                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1793                                      (void __user *)arg));
1794         }
1795         case OBD_IOC_FID2PATH:
1796                 RETURN(ll_fid2path(inode, (void __user *)arg));
1797         case LL_IOC_GETPARENT:
1798                 RETURN(ll_getparent(file, (void __user *)arg));
1799         case LL_IOC_FID2MDTIDX: {
1800                 struct obd_export *exp = ll_i2mdexp(inode);
1801                 struct lu_fid     fid;
1802                 __u32             index;
1803
1804                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1805                                    sizeof(fid)))
1806                         RETURN(-EFAULT);
1807
1808                 /* Call mdc_iocontrol */
1809                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1810                                    (__u32 __user *)&index);
1811                 if (rc != 0)
1812                         RETURN(rc);
1813
1814                 RETURN(index);
1815         }
1816         case LL_IOC_HSM_REQUEST: {
1817                 struct hsm_user_request *hur;
1818                 ssize_t                  totalsize;
1819
1820                 OBD_ALLOC_PTR(hur);
1821                 if (hur == NULL)
1822                         RETURN(-ENOMEM);
1823
1824                 /* We don't know the true size yet; copy the fixed-size part */
1825                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1826                         OBD_FREE_PTR(hur);
1827                         RETURN(-EFAULT);
1828                 }
1829
1830                 /* Compute the whole struct size */
1831                 totalsize = hur_len(hur);
1832                 OBD_FREE_PTR(hur);
1833                 if (totalsize < 0)
1834                         RETURN(-E2BIG);
1835
1836                 /* Final size will be more than double totalsize */
1837                 if (totalsize >= MDS_MAXREQSIZE / 3)
1838                         RETURN(-E2BIG);
1839
1840                 OBD_ALLOC_LARGE(hur, totalsize);
1841                 if (hur == NULL)
1842                         RETURN(-ENOMEM);
1843
1844                 /* Copy the whole struct */
1845                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1846                         GOTO(out_hur, rc = -EFAULT);
1847
1848                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1849                         const struct lu_fid *fid;
1850                         struct inode *f;
1851                         int i;
1852
1853                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1854                                 fid = &hur->hur_user_item[i].hui_fid;
1855                                 f = search_inode_for_lustre(inode->i_sb, fid);
1856                                 if (IS_ERR(f)) {
1857                                         rc = PTR_ERR(f);
1858                                         break;
1859                                 }
1860
1861                                 rc = ll_hsm_release(f);
1862                                 iput(f);
1863                                 if (rc != 0)
1864                                         break;
1865                         }
1866                 } else {
1867                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1868                                            hur, NULL);
1869                 }
1870
1871 out_hur:
1872                 OBD_FREE_LARGE(hur, totalsize);
1873
1874                 RETURN(rc);
1875         }
1876         case LL_IOC_HSM_PROGRESS: {
1877                 struct hsm_progress_kernel      hpk;
1878                 struct hsm_progress             hp;
1879
1880                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1881                         RETURN(-EFAULT);
1882
1883                 hpk.hpk_fid = hp.hp_fid;
1884                 hpk.hpk_cookie = hp.hp_cookie;
1885                 hpk.hpk_extent = hp.hp_extent;
1886                 hpk.hpk_flags = hp.hp_flags;
1887                 hpk.hpk_errval = hp.hp_errval;
1888                 hpk.hpk_data_version = 0;
1889
1890                 /* File may not exist in Lustre; all progress
1891                  * reported to Lustre root */
1892                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
1893                                    NULL);
1894                 RETURN(rc);
1895         }
1896         case LL_IOC_HSM_CT_START:
1897                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1898                         RETURN(-EPERM);
1899
1900                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
1901                                        (struct lustre_kernelcomm __user *)arg);
1902                 RETURN(rc);
1903
1904         case LL_IOC_HSM_COPY_START: {
1905                 struct hsm_copy *copy;
1906                 int              rc;
1907
1908                 OBD_ALLOC_PTR(copy);
1909                 if (copy == NULL)
1910                         RETURN(-ENOMEM);
1911                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1912                         OBD_FREE_PTR(copy);
1913                         RETURN(-EFAULT);
1914                 }
1915
1916                 rc = ll_ioc_copy_start(inode->i_sb, copy);
1917                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1918                         rc = -EFAULT;
1919
1920                 OBD_FREE_PTR(copy);
1921                 RETURN(rc);
1922         }
1923         case LL_IOC_HSM_COPY_END: {
1924                 struct hsm_copy *copy;
1925                 int              rc;
1926
1927                 OBD_ALLOC_PTR(copy);
1928                 if (copy == NULL)
1929                         RETURN(-ENOMEM);
1930                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
1931                         OBD_FREE_PTR(copy);
1932                         RETURN(-EFAULT);
1933                 }
1934
1935                 rc = ll_ioc_copy_end(inode->i_sb, copy);
1936                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
1937                         rc = -EFAULT;
1938
1939                 OBD_FREE_PTR(copy);
1940                 RETURN(rc);
1941         }
1942         case LL_IOC_MIGRATE: {
1943                 struct lmv_user_md *lum;
1944                 char *buf = NULL;
1945                 int len;
1946                 char *filename;
1947                 int namelen = 0;
1948                 int rc;
1949
1950                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1951                 if (rc)
1952                         RETURN(rc);
1953
1954                 data = (struct obd_ioctl_data *)buf;
1955                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1956                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1957                         GOTO(migrate_free, rc = -EINVAL);
1958
1959                 filename = data->ioc_inlbuf1;
1960                 namelen = data->ioc_inllen1;
1961
1962                 if (namelen < 1 || namelen != strlen(filename) + 1) {
1963                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1964                         GOTO(migrate_free, rc = -EINVAL);
1965                 }
1966
1967                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1968                 if (lum->lum_magic != LMV_USER_MAGIC &&
1969                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
1970                         rc = -EINVAL;
1971                         CERROR("%s: wrong lum magic %x: rc = %d\n",
1972                                filename, lum->lum_magic, rc);
1973                         GOTO(migrate_free, rc);
1974                 }
1975
1976                 rc = ll_migrate(inode, file, lum, filename);
1977 migrate_free:
1978                 OBD_FREE_LARGE(buf, len);
1979
1980                 RETURN(rc);
1981         }
1982         case LL_IOC_FSGETXATTR:
1983                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
1984         case LL_IOC_FSSETXATTR:
1985                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
1986         case LL_IOC_PCC_DETACH_BY_FID: {
1987                 struct lu_pcc_detach_fid *detach;
1988                 struct lu_fid *fid;
1989                 struct inode *inode2;
1990                 unsigned long ino;
1991
1992                 OBD_ALLOC_PTR(detach);
1993                 if (detach == NULL)
1994                         RETURN(-ENOMEM);
1995
1996                 if (copy_from_user(detach,
1997                                    (const struct lu_pcc_detach_fid __user *)arg,
1998                                    sizeof(*detach)))
1999                         GOTO(out_detach, rc = -EFAULT);
2000
2001                 fid = &detach->pccd_fid;
2002                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2003                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2004                 if (inode2 == NULL)
2005                         /* Target inode is not in inode cache, and PCC file
2006                          * has aleady released, return immdiately.
2007                          */
2008                         GOTO(out_detach, rc = 0);
2009
2010                 if (!S_ISREG(inode2->i_mode))
2011                         GOTO(out_iput, rc = -EINVAL);
2012
2013                 if (!inode_owner_or_capable(inode2))
2014                         GOTO(out_iput, rc = -EPERM);
2015
2016                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2017 out_iput:
2018                 iput(inode2);
2019 out_detach:
2020                 OBD_FREE_PTR(detach);
2021                 RETURN(rc);
2022         }
2023         default:
2024                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
2025                                      (void __user *)arg));
2026         }
2027 }
2028
2029 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2030 {
2031         struct inode *inode = file->f_mapping->host;
2032         struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
2033         struct ll_sb_info *sbi = ll_i2sbi(inode);
2034         int api32 = ll_need_32bit_api(sbi);
2035         loff_t ret = -EINVAL;
2036         ENTRY;
2037
2038         inode_lock(inode);
2039         switch (origin) {
2040                 case SEEK_SET:
2041                         break;
2042                 case SEEK_CUR:
2043                         offset += file->f_pos;
2044                         break;
2045                 case SEEK_END:
2046                         if (offset > 0)
2047                                 GOTO(out, ret);
2048                         if (api32)
2049                                 offset += LL_DIR_END_OFF_32BIT;
2050                         else
2051                                 offset += LL_DIR_END_OFF;
2052                         break;
2053                 default:
2054                         GOTO(out, ret);
2055         }
2056
2057         if (offset >= 0 &&
2058             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2059              (!api32 && offset <= LL_DIR_END_OFF))) {
2060                 if (offset != file->f_pos) {
2061                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2062                             (!api32 && offset == LL_DIR_END_OFF))
2063                                 fd->lfd_pos = MDS_DIR_END_OFF;
2064                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
2065                                 fd->lfd_pos = offset << 32;
2066                         else
2067                                 fd->lfd_pos = offset;
2068                         file->f_pos = offset;
2069                         file->f_version = 0;
2070                 }
2071                 ret = offset;
2072         }
2073         GOTO(out, ret);
2074
2075 out:
2076         inode_unlock(inode);
2077         return ret;
2078 }
2079
2080 static int ll_dir_open(struct inode *inode, struct file *file)
2081 {
2082         ENTRY;
2083         RETURN(ll_file_open(inode, file));
2084 }
2085
2086 static int ll_dir_release(struct inode *inode, struct file *file)
2087 {
2088         ENTRY;
2089         RETURN(ll_file_release(inode, file));
2090 }
2091
2092 const struct file_operations ll_dir_operations = {
2093         .llseek         = ll_dir_seek,
2094         .open           = ll_dir_open,
2095         .release        = ll_dir_release,
2096         .read           = generic_read_dir,
2097 #ifdef HAVE_DIR_CONTEXT
2098         .iterate        = ll_iterate,
2099 #else
2100         .readdir        = ll_readdir,
2101 #endif
2102         .unlocked_ioctl = ll_dir_ioctl,
2103         .fsync          = ll_fsync,
2104 };