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 #include <linux/uidgid.h>
  44 #include <linux/uaccess.h>
  45 #include <linux/buffer_head.h>   // for wait_on_buffer
  46 #include <linux/pagevec.h>
  47
  48 #define DEBUG_SUBSYSTEM S_LLITE
  49
  50 #include <obd_support.h>
  51 #include <obd_class.h>
  52 #include <uapi/linux/lustre/lustre_ioctl.h>
  53 #include <lustre_lib.h>
  54 #include <lustre_dlm.h>
  55 #include <lustre_fid.h>
  56 #include <lustre_kernelcomm.h>
  57 #include <lustre_swab.h>
  58
  59 #include "llite_internal.h"
  60
  61 /*
  62  * (new) readdir implementation overview.
  63  *
  64  * Original lustre readdir implementation cached exact copy of raw directory
  65  * pages on the client. These pages were indexed in client page cache by
  66  * logical offset in the directory file. This design, while very simple and
  67  * intuitive had some inherent problems:
  68  *
  69  *     . it implies that byte offset to the directory entry serves as a
  70  *     telldir(3)/seekdir(3) cookie, but that offset is not stable: in
  71  *     ext3/htree directory entries may move due to splits, and more
  72  *     importantly,
  73  *
  74  *     . it is incompatible with the design of split directories for cmd3,
  75  *     that assumes that names are distributed across nodes based on their
  76  *     hash, and so readdir should be done in hash order.
  77  *
  78  * New readdir implementation does readdir in hash order, and uses hash of a
  79  * file name as a telldir/seekdir cookie. This led to number of complications:
  80  *
  81  *     . hash is not unique, so it cannot be used to index cached directory
  82  *     pages on the client (note, that it requires a whole pageful of hash
  83  *     collided entries to cause two pages to have identical hashes);
  84  *
  85  *     . hash is not unique, so it cannot, strictly speaking, be used as an
  86  *     entry cookie. ext3/htree has the same problem and lustre implementation
  87  *     mimics their solution: seekdir(hash) positions directory at the first
  88  *     entry with the given hash.
  89  *
  90  * Client side.
  91  *
  92  * 0. caching
  93  *
  94  * Client caches directory pages using hash of the first entry as an index. As
  95  * noted above hash is not unique, so this solution doesn't work as is:
  96  * special processing is needed for "page hash chains" (i.e., sequences of
  97  * pages filled with entries all having the same hash value).
  98  *
  99  * First, such chains have to be detected. To this end, server returns to the
 100  * client the hash of the first entry on the page next to one returned. When
 101  * client detects that this hash is the same as hash of the first entry on the
 102  * returned page, page hash collision has to be handled. Pages in the
 103  * hash chain, except first one, are termed "overflow pages".
 104  *
 105  * Solution to index uniqueness problem is to not cache overflow
 106  * pages. Instead, when page hash collision is detected, all overflow pages
 107  * from emerging chain are immediately requested from the server and placed in
 108  * a special data structure (struct ll_dir_chain). This data structure is used
 109  * by ll_readdir() to process entries from overflow pages. When readdir
 110  * invocation finishes, overflow pages are discarded. If page hash collision
 111  * chain weren't completely processed, next call to readdir will again detect
 112  * page hash collision, again read overflow pages in, process next portion of
 113  * entries and again discard the pages. This is not as wasteful as it looks,
 114  * because, given reasonable hash, page hash collisions are extremely rare.
 115  *
 116  * 1. directory positioning
 117  *
 118  * When seekdir(hash) is called, original
 119  *
 120  *
 121  *
 122  *
 123  *
 124  *
 125  *
 126  *
 127  * Server.
 128  *
 129  * identification of and access to overflow pages
 130  *
 131  * page format
 132  *
 133  * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
 134  * a header lu_dirpage which describes the start/end hash, and whether this
 135  * page is empty (contains no dir entry) or hash collide with next page.
 136  * After client receives reply, several pages will be integrated into dir page
 137  * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
 138  * lu_dirpage for this integrated page will be adjusted. See
 139  * mdc_adjust_dirpages().
 140  *
 141  */
 142 struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
 143                              __u64 offset, struct ll_dir_chain *chain)
 144 {
 145         struct md_callback      cb_op;
 146         struct page             *page;
 147         int                     rc;
 148
 149         cb_op.md_blocking_ast = ll_md_blocking_ast;
 150         rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
 151         if (rc != 0)
 152                 return ERR_PTR(rc);
 153
 154         return page;
 155 }
 156
 157 void ll_release_page(struct inode *inode, struct page *page,
 158                      bool remove)
 159 {
 160         kunmap(page);
 161
 162         /* Always remove the page for striped dir, because the page is
 163          * built from temporarily in LMV layer */
 164         if (inode && ll_dir_striped(inode)) {
 165                 __free_page(page);
 166                 return;
 167         }
 168
 169         if (remove) {
 170                 lock_page(page);
 171                 if (likely(page->mapping != NULL))
 172                         delete_from_page_cache(page);
 173                 unlock_page(page);
 174         }
 175         put_page(page);
 176 }
 177
 178 /**
 179  * return IF_* type for given lu_dirent entry.
 180  * IF_* flag shld be converted to particular OS file type in
 181  * platform llite module.
 182  */
 183 static u16 ll_dirent_type_get(struct lu_dirent *ent)
 184 {
 185         u16 type = 0;
 186         struct luda_type *lt;
 187         int len = 0;
 188
 189         if (le32_to_cpu(ent->lde_attrs) & LUDA_TYPE) {
 190                 const unsigned align = sizeof(struct luda_type) - 1;
 191
 192                 len = le16_to_cpu(ent->lde_namelen);
 193                 len = (len + align) & ~align;
 194                 lt = (void *)ent->lde_name + len;
 195                 type = IFTODT(le16_to_cpu(lt->lt_type));
 196         }
 197
 198         return type;
 199 }
 200
 201 #ifdef HAVE_DIR_CONTEXT
 202 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 203                 struct dir_context *ctx)
 204 {
 205 #else
 206 int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
 207                 void *cookie, filldir_t filldir)
 208 {
 209 #endif
 210         struct ll_sb_info    *sbi        = ll_i2sbi(inode);
 211         __u64                 pos        = *ppos;
 212         bool                  is_api32 = ll_need_32bit_api(sbi);
 213         bool                  is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 214         struct page          *page;
 215         struct ll_dir_chain   chain;
 216         bool                  done = false;
 217         int                   rc = 0;
 218         ENTRY;
 219
 220         ll_dir_chain_init(&chain);
 221
 222         page = ll_get_dir_page(inode, op_data, pos, &chain);
 223
 224         while (rc == 0 && !done) {
 225                 struct lu_dirpage *dp;
 226                 struct lu_dirent  *ent;
 227                 __u64 hash;
 228                 __u64 next;
 229
 230                 if (IS_ERR(page)) {
 231                         rc = PTR_ERR(page);
 232                         break;
 233                 }
 234
 235                 hash = MDS_DIR_END_OFF;
 236                 dp = page_address(page);
 237                 for (ent = lu_dirent_start(dp); ent != NULL && !done;
 238                      ent = lu_dirent_next(ent)) {
 239                         __u16          type;
 240                         int            namelen;
 241                         struct lu_fid  fid;
 242                         __u64          lhash;
 243                         __u64          ino;
 244
 245                         hash = le64_to_cpu(ent->lde_hash);
 246                         if (hash < pos) /* Skip until we find target hash */
 247                                 continue;
 248
 249                         namelen = le16_to_cpu(ent->lde_namelen);
 250                         if (namelen == 0) /* Skip dummy record */
 251                                 continue;
 252
 253                         if (is_api32 && is_hash64)
 254                                 lhash = hash >> 32;
 255                         else
 256                                 lhash = hash;
 257                         fid_le_to_cpu(&fid, &ent->lde_fid);
 258                         ino = cl_fid_build_ino(&fid, is_api32);
 259                         type = ll_dirent_type_get(ent);
 260                         /* For ll_nfs_get_name_filldir(), it will try to access
 261                          * 'ent' through 'lde_name', so the parameter 'name'
 262                          * for 'filldir()' must be part of the 'ent'. */
 263 #ifdef HAVE_DIR_CONTEXT
 264                         ctx->pos = lhash;
 265                         done = !dir_emit(ctx, ent->lde_name, namelen, ino,
 266                                          type);
 267 #else
 268                         done = filldir(cookie, ent->lde_name, namelen, lhash,
 269                                        ino, type);
 270 #endif
 271                 }
 272
 273                 if (done) {
 274                         pos = hash;
 275                         ll_release_page(inode, page, false);
 276                         break;
 277                 }
 278
 279                 next = le64_to_cpu(dp->ldp_hash_end);
 280                 pos = next;
 281                 if (pos == MDS_DIR_END_OFF) {
 282                         /*
 283                          * End of directory reached.
 284                          */
 285                         done = 1;
 286                         ll_release_page(inode, page, false);
 287                 } else {
 288                         /*
 289                          * Normal case: continue to the next
 290                          * page.
 291                          */
 292                         ll_release_page(inode, page,
 293                                         le32_to_cpu(dp->ldp_flags) &
 294                                         LDF_COLLIDE);
 295                         next = pos;
 296                         page = ll_get_dir_page(inode, op_data, pos,
 297                                                &chain);
 298                 }
 299         }
 300 #ifdef HAVE_DIR_CONTEXT
 301         ctx->pos = pos;
 302 #else
 303         *ppos = pos;
 304 #endif
 305         ll_dir_chain_fini(&chain);
 306         RETURN(rc);
 307 }
 308
 309 #ifdef HAVE_DIR_CONTEXT
 310 static int ll_iterate(struct file *filp, struct dir_context *ctx)
 311 #else
 312 static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
 313 #endif
 314 {
 315         struct inode *inode = file_inode(filp);
 316         struct ll_file_data *lfd = filp->private_data;
 317         struct ll_sb_info *sbi = ll_i2sbi(inode);
 318         int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
 319         int api32 = ll_need_32bit_api(sbi);
 320         struct md_op_data *op_data;
 321         struct lu_fid pfid = { 0 };
 322         ktime_t kstart = ktime_get();
 323         __u64 pos;
 324         int rc;
 325         ENTRY;
 326
 327         if (lfd != NULL)
 328                 pos = lfd->lfd_pos;
 329         else
 330                 pos = 0;
 331
 332         CDEBUG(D_VFSTRACE,
 333                "VFS Op:inode="DFID"(%p) pos/size%lu/%llu 32bit_api %d\n",
 334                PFID(ll_inode2fid(inode)),
 335                inode, (unsigned long)pos, i_size_read(inode), api32);
 336
 337         if (pos == MDS_DIR_END_OFF)
 338                 /*
 339                  * end-of-file.
 340                  */
 341                 GOTO(out, rc = 0);
 342
 343         if (unlikely(ll_dir_striped(inode))) {
 344                 /*
 345                  * This is only needed for striped dir to fill ..,
 346                  * see lmv_read_page()
 347                  */
 348                 if (file_dentry(filp)->d_parent != NULL &&
 349                     file_dentry(filp)->d_parent->d_inode != NULL) {
 350                         __u64 ibits = MDS_INODELOCK_LOOKUP;
 351                         struct inode *parent =
 352                                 file_dentry(filp)->d_parent->d_inode;
 353
 354                         if (ll_have_md_lock(parent, &ibits, LCK_MINMODE))
 355                                 pfid = *ll_inode2fid(parent);
 356                 }
 357
 358                 /* If it can not find in cache, do lookup .. on the master
 359                  * object */
 360                 if (fid_is_zero(&pfid)) {
 361                         rc = ll_dir_get_parent_fid(inode, &pfid);
 362                         if (rc != 0)
 363                                 RETURN(rc);
 364                 }
 365         }
 366
 367         op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
 368                                      LUSTRE_OPC_ANY, inode);
 369         if (IS_ERR(op_data))
 370                 GOTO(out, rc = PTR_ERR(op_data));
 371
 372         /* foreign dirs are browsed out of Lustre */
 373         if (unlikely(op_data->op_mea1 != NULL &&
 374                      op_data->op_mea1->lsm_md_magic == LMV_MAGIC_FOREIGN)) {
 375                 ll_finish_md_op_data(op_data);
 376                 RETURN(-ENODATA);
 377         }
 378
 379         op_data->op_fid3 = pfid;
 380
 381 #ifdef HAVE_DIR_CONTEXT
 382         ctx->pos = pos;
 383         rc = ll_dir_read(inode, &pos, op_data, ctx);
 384         pos = ctx->pos;
 385 #else
 386         rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
 387 #endif
 388         if (lfd != NULL)
 389                 lfd->lfd_pos = pos;
 390
 391         if (pos == MDS_DIR_END_OFF) {
 392                 if (api32)
 393                         pos = LL_DIR_END_OFF_32BIT;
 394                 else
 395                         pos = LL_DIR_END_OFF;
 396         } else {
 397                 if (api32 && hash64)
 398                         pos = pos >> 32;
 399         }
 400 #ifdef HAVE_DIR_CONTEXT
 401         ctx->pos = pos;
 402 #else
 403         filp->f_pos = pos;
 404 #endif
 405         ll_finish_md_op_data(op_data);
 406
 407 out:
 408         if (!rc)
 409                 ll_stats_ops_tally(sbi, LPROC_LL_READDIR,
 410                                    ktime_us_delta(ktime_get(), kstart));
 411
 412         RETURN(rc);
 413 }
 414
 415 /**
 416  * Create striped directory with specified stripe(@lump)
 417  *
 418  * \param[in] dparent   the parent of the directory.
 419  * \param[in] lump      the specified stripes.
 420  * \param[in] dirname   the name of the directory.
 421  * \param[in] mode      the specified mode of the directory.
 422  *
 423  * \retval              =0 if striped directory is being created successfully.
 424  *                      <0 if the creation is failed.
 425  */
 426 static int ll_dir_setdirstripe(struct dentry *dparent, struct lmv_user_md *lump,
 427                                size_t len, const char *dirname, umode_t mode)
 428 {
 429         struct inode *parent = dparent->d_inode;
 430         struct ptlrpc_request *request = NULL;
 431         struct md_op_data *op_data;
 432         struct ll_sb_info *sbi = ll_i2sbi(parent);
 433         struct inode *inode = NULL;
 434         struct dentry dentry = {
 435                 .d_parent = dparent,
 436                 .d_name = {
 437                         .name = dirname,
 438                         .len = strlen(dirname),
 439                         .hash = ll_full_name_hash(dparent, dirname,
 440                                                   strlen(dirname)),
 441                 },
 442         };
 443         int err;
 444         ENTRY;
 445
 446         if (unlikely(!lmv_user_magic_supported(lump->lum_magic)))
 447                 RETURN(-EINVAL);
 448
 449         if (lump->lum_magic != LMV_MAGIC_FOREIGN) {
 450                 CDEBUG(D_VFSTRACE,
 451                        "VFS Op:inode="DFID"(%p) name %s stripe_offset %d, stripe_count: %u\n",
 452                        PFID(ll_inode2fid(parent)), parent, dirname,
 453                        (int)lump->lum_stripe_offset, lump->lum_stripe_count);
 454         } else {
 455                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lump;
 456
 457                 CDEBUG(D_VFSTRACE,
 458                        "VFS Op:inode="DFID"(%p) name %s foreign, length %u, value '%.*s'\n",
 459                        PFID(ll_inode2fid(parent)), parent, dirname,
 460                        lfm->lfm_length, lfm->lfm_length, lfm->lfm_value);
 461         }
 462
 463         if (lump->lum_stripe_count > 1 &&
 464             !(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_DIR_STRIPE))
 465                 RETURN(-EINVAL);
 466
 467         if (IS_DEADDIR(parent) &&
 468             !OBD_FAIL_CHECK(OBD_FAIL_LLITE_NO_CHECK_DEAD))
 469                 RETURN(-ENOENT);
 470
 471         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_CRUSH)) {
 472                 if ((lump->lum_hash_type & LMV_HASH_TYPE_MASK) ==
 473                      LMV_HASH_TYPE_CRUSH) {
 474                         /* if server doesn't support 'crush' hash type,
 475                          * switch to fnv_1a_64.
 476                          */
 477                         lump->lum_hash_type &= ~LMV_HASH_TYPE_MASK;
 478                         lump->lum_hash_type |= LMV_HASH_TYPE_FNV_1A_64;
 479                 } else if ((lump->lum_hash_type & LMV_HASH_TYPE_MASK) ==
 480                      LMV_HASH_TYPE_UNKNOWN) {
 481                         /* from 2.14 MDT will choose default hash type if client
 482                          * doesn't set a valid one, while old server doesn't
 483                          * handle it.
 484                          */
 485                         lump->lum_hash_type &= ~LMV_HASH_TYPE_MASK;
 486                         lump->lum_hash_type |= LMV_HASH_TYPE_DEFAULT;
 487                 }
 488         }
 489
 490         if (unlikely(!lmv_user_magic_supported(cpu_to_le32(lump->lum_magic))))
 491                 lustre_swab_lmv_user_md(lump);
 492
 493         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
 494                 mode &= ~current_umask();
 495         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
 496         op_data = ll_prep_md_op_data(NULL, parent, NULL, dirname,
 497                                      strlen(dirname), mode, LUSTRE_OPC_MKDIR,
 498                                      lump);
 499         if (IS_ERR(op_data))
 500                 RETURN(PTR_ERR(op_data));
 501
 502         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 503                 /* selinux_dentry_init_security() uses dentry->d_parent and name
 504                  * to determine the security context for the file. So our fake
 505                  * dentry should be real enough for this purpose. */
 506                 err = ll_dentry_init_security(&dentry, mode, &dentry.d_name,
 507                                               &op_data->op_file_secctx_name,
 508                                               &op_data->op_file_secctx,
 509                                               &op_data->op_file_secctx_size);
 510                 if (err < 0)
 511                         GOTO(out_op_data, err);
 512         }
 513
 514         op_data->op_cli_flags |= CLI_SET_MEA;
 515         err = md_create(sbi->ll_md_exp, op_data, lump, len, mode,
 516                         from_kuid(&init_user_ns, current_fsuid()),
 517                         from_kgid(&init_user_ns, current_fsgid()),
 518                         cfs_curproc_cap_pack(), 0, &request);
 519         if (err)
 520                 GOTO(out_request, err);
 521
 522         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_SETDIRSTRIPE_PAUSE, cfs_fail_val);
 523
 524         err = ll_prep_inode(&inode, request, parent->i_sb, NULL);
 525         if (err)
 526                 GOTO(out_inode, err);
 527
 528         dentry.d_inode = inode;
 529
 530         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
 531                 inode_lock(inode);
 532                 err = security_inode_notifysecctx(inode,
 533                                                   op_data->op_file_secctx,
 534                                                   op_data->op_file_secctx_size);
 535                 inode_unlock(inode);
 536         } else {
 537                 err = ll_inode_init_security(&dentry, inode, parent);
 538         }
 539         if (err)
 540                 GOTO(out_inode, err);
 541
 542 out_inode:
 543         if (inode != NULL)
 544                 iput(inode);
 545 out_request:
 546         ptlrpc_req_finished(request);
 547 out_op_data:
 548         ll_finish_md_op_data(op_data);
 549
 550         return err;
 551 }
 552
 553 int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 554                      int set_default)
 555 {
 556         struct ll_sb_info *sbi = ll_i2sbi(inode);
 557         struct md_op_data *op_data;
 558         struct ptlrpc_request *req = NULL;
 559         int rc = 0;
 560         int lum_size;
 561         ENTRY;
 562
 563         if (lump != NULL) {
 564                 switch (lump->lmm_magic) {
 565                 case LOV_USER_MAGIC_V1:
 566                         lum_size = sizeof(struct lov_user_md_v1);
 567                         break;
 568                 case LOV_USER_MAGIC_V3:
 569                         lum_size = sizeof(struct lov_user_md_v3);
 570                         break;
 571                 case LOV_USER_MAGIC_COMP_V1:
 572                         lum_size = ((struct lov_comp_md_v1 *)lump)->lcm_size;
 573                         break;
 574                 case LMV_USER_MAGIC:
 575                         if (lump->lmm_magic != cpu_to_le32(LMV_USER_MAGIC))
 576                                 lustre_swab_lmv_user_md(
 577                                         (struct lmv_user_md *)lump);
 578                         lum_size = sizeof(struct lmv_user_md);
 579                         break;
 580                 case LOV_USER_MAGIC_SPECIFIC: {
 581                         struct lov_user_md_v3 *v3 =
 582                                 (struct lov_user_md_v3 *)lump;
 583                         if (v3->lmm_stripe_count > LOV_MAX_STRIPE_COUNT)
 584                                 RETURN(-EINVAL);
 585                         lum_size = lov_user_md_size(v3->lmm_stripe_count,
 586                                                     LOV_USER_MAGIC_SPECIFIC);
 587                         break;
 588                 }
 589                 default:
 590                         CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
 591                                         " %#08x != %#08x nor %#08x\n",
 592                                         lump->lmm_magic, LOV_USER_MAGIC_V1,
 593                                         LOV_USER_MAGIC_V3);
 594                         RETURN(-EINVAL);
 595                 }
 596
 597                 /*
 598                  * This is coming from userspace, so should be in
 599                  * local endian.  But the MDS would like it in little
 600                  * endian, so we swab it before we send it.
 601                  */
 602                 if ((__swab32(lump->lmm_magic) & le32_to_cpu(LOV_MAGIC_MASK)) ==
 603                     le32_to_cpu(LOV_MAGIC_MAGIC))
 604                         lustre_swab_lov_user_md(lump, 0);
 605         } else {
 606                 lum_size = sizeof(struct lov_user_md_v1);
 607         }
 608
 609         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
 610                                      LUSTRE_OPC_ANY, NULL);
 611         if (IS_ERR(op_data))
 612                 RETURN(PTR_ERR(op_data));
 613
 614         /* swabbing is done in lov_setstripe() on server side */
 615         rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size, &req);
 616         ll_finish_md_op_data(op_data);
 617         ptlrpc_req_finished(req);
 618         if (rc)
 619                 RETURN(rc);
 620
 621         RETURN(rc);
 622 }
 623
 624 static int ll_dir_get_default_layout(struct inode *inode, void **plmm,
 625                                      int *plmm_size,
 626                                      struct ptlrpc_request **request, u64 valid,
 627                                      enum get_default_layout_type type)
 628 {
 629         struct ll_sb_info *sbi = ll_i2sbi(inode);
 630         struct mdt_body   *body;
 631         struct lov_mds_md *lmm = NULL;
 632         struct ptlrpc_request *req = NULL;
 633         int rc, lmm_size;
 634         struct md_op_data *op_data;
 635         struct lu_fid fid;
 636         ENTRY;
 637
 638         rc = ll_get_default_mdsize(sbi, &lmm_size);
 639         if (rc)
 640                 RETURN(rc);
 641
 642         op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
 643                                      0, lmm_size, LUSTRE_OPC_ANY,
 644                                      NULL);
 645         if (IS_ERR(op_data))
 646                 RETURN(PTR_ERR(op_data));
 647
 648         op_data->op_valid = valid | OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
 649
 650         if (type == GET_DEFAULT_LAYOUT_ROOT) {
 651                 lu_root_fid(&op_data->op_fid1);
 652                 fid = op_data->op_fid1;
 653         } else {
 654                 fid = *ll_inode2fid(inode);
 655         }
 656
 657         rc = md_getattr(sbi->ll_md_exp, op_data, &req);
 658         ll_finish_md_op_data(op_data);
 659         if (rc < 0) {
 660                 CDEBUG(D_INFO, "md_getattr failed on inode "DFID": rc %d\n",
 661                        PFID(&fid), rc);
 662                 GOTO(out, rc);
 663         }
 664
 665         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 666         LASSERT(body != NULL);
 667
 668         lmm_size = body->mbo_eadatasize;
 669
 670         if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
 671             lmm_size == 0) {
 672                 GOTO(out, rc = -ENODATA);
 673         }
 674
 675         lmm = req_capsule_server_sized_get(&req->rq_pill,
 676                                            &RMF_MDT_MD, lmm_size);
 677         LASSERT(lmm != NULL);
 678
 679         /*
 680          * This is coming from the MDS, so is probably in
 681          * little endian.  We convert it to host endian before
 682          * passing it to userspace.
 683          */
 684         /* We don't swab objects for directories */
 685         switch (le32_to_cpu(lmm->lmm_magic)) {
 686         case LOV_MAGIC_V1:
 687         case LOV_MAGIC_V3:
 688         case LOV_MAGIC_COMP_V1:
 689         case LOV_USER_MAGIC_SPECIFIC:
 690                 if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
 691                         lustre_swab_lov_user_md((struct lov_user_md *)lmm, 0);
 692                 break;
 693         case LMV_MAGIC_V1:
 694                 if (LMV_MAGIC != cpu_to_le32(LMV_MAGIC))
 695                         lustre_swab_lmv_mds_md((union lmv_mds_md *)lmm);
 696                 break;
 697         case LMV_USER_MAGIC:
 698                 if (LMV_USER_MAGIC != cpu_to_le32(LMV_USER_MAGIC))
 699                         lustre_swab_lmv_user_md((struct lmv_user_md *)lmm);
 700                 break;
 701         case LMV_MAGIC_FOREIGN: {
 702                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lmm;
 703
 704                 if (LMV_MAGIC_FOREIGN != cpu_to_le32(LMV_MAGIC_FOREIGN)) {
 705                         __swab32s(&lfm->lfm_magic);
 706                         __swab32s(&lfm->lfm_length);
 707                         __swab32s(&lfm->lfm_type);
 708                         __swab32s(&lfm->lfm_flags);
 709                 }
 710                 break;
 711         }
 712         default:
 713                 CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
 714                 rc = -EPROTO;
 715         }
 716 out:
 717         *plmm = lmm;
 718         *plmm_size = lmm_size;
 719         *request = req;
 720         return rc;
 721 }
 722
 723 /**
 724  * This function will be used to get default LOV/LMV/Default LMV
 725  * @valid will be used to indicate which stripe it will retrieve.
 726  * If the directory does not have its own default layout, then the
 727  * function will request the default layout from root FID.
 728  *      OBD_MD_MEA              LMV stripe EA
 729  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 730  *      otherwise               Default LOV EA.
 731  * Each time, it can only retrieve 1 stripe EA
 732  **/
 733 int ll_dir_getstripe_default(struct inode *inode, void **plmm, int *plmm_size,
 734                              struct ptlrpc_request **request,
 735                              struct ptlrpc_request **root_request,
 736                              u64 valid)
 737 {
 738         struct ptlrpc_request *req = NULL;
 739         struct ptlrpc_request *root_req = NULL;
 740         struct lov_mds_md *lmm = NULL;
 741         int lmm_size = 0;
 742         int rc = 0;
 743         ENTRY;
 744
 745         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 746                                        &req, valid, 0);
 747         if (rc == -ENODATA && !fid_is_root(ll_inode2fid(inode)) &&
 748             !(valid & (OBD_MD_MEA|OBD_MD_DEFAULT_MEA)) && root_request != NULL)
 749                 rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 750                                                &root_req, valid,
 751                                                GET_DEFAULT_LAYOUT_ROOT);
 752
 753         *plmm = lmm;
 754         *plmm_size = lmm_size;
 755         *request = req;
 756         if (root_request != NULL)
 757                 *root_request = root_req;
 758
 759         RETURN(rc);
 760 }
 761
 762 /**
 763  * This function will be used to get default LOV/LMV/Default LMV
 764  * @valid will be used to indicate which stripe it will retrieve
 765  *      OBD_MD_MEA              LMV stripe EA
 766  *      OBD_MD_DEFAULT_MEA      Default LMV stripe EA
 767  *      otherwise               Default LOV EA.
 768  * Each time, it can only retrieve 1 stripe EA
 769  **/
 770 int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size,
 771                      struct ptlrpc_request **request, u64 valid)
 772 {
 773         struct ptlrpc_request *req = NULL;
 774         struct lov_mds_md *lmm = NULL;
 775         int lmm_size = 0;
 776         int rc = 0;
 777         ENTRY;
 778
 779         rc = ll_dir_get_default_layout(inode, (void **)&lmm, &lmm_size,
 780                                        &req, valid, 0);
 781
 782         *plmm = lmm;
 783         *plmm_size = lmm_size;
 784         *request = req;
 785
 786         RETURN(rc);
 787 }
 788
 789 int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid)
 790 {
 791         struct md_op_data       *op_data;
 792         int                     rc;
 793         int                     mdt_index;
 794         ENTRY;
 795
 796         OBD_ALLOC_PTR(op_data);
 797         if (op_data == NULL)
 798                 RETURN(-ENOMEM);
 799
 800         op_data->op_flags |= MF_GET_MDT_IDX;
 801         op_data->op_fid1 = *fid;
 802         rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
 803         mdt_index = op_data->op_mds;
 804         OBD_FREE_PTR(op_data);
 805         if (rc < 0)
 806                 RETURN(rc);
 807
 808         RETURN(mdt_index);
 809 }
 810
 811 /*
 812  *  Get MDT index for the inode.
 813  */
 814 int ll_get_mdt_idx(struct inode *inode)
 815 {
 816         return ll_get_mdt_idx_by_fid(ll_i2sbi(inode), ll_inode2fid(inode));
 817 }
 818
 819 /**
 820  * Generic handler to do any pre-copy work.
 821  *
 822  * It sends a first hsm_progress (with extent length == 0) to coordinator as a
 823  * first information for it that real work has started.
 824  *
 825  * Moreover, for a ARCHIVE request, it will sample the file data version and
 826  * store it in \a copy.
 827  *
 828  * \return 0 on success.
 829  */
 830 static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
 831 {
 832         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 833         struct hsm_progress_kernel       hpk;
 834         int                              rc = 0;
 835         int                              rc2;
 836         ENTRY;
 837
 838         /* Forge a hsm_progress based on data from copy. */
 839         hpk.hpk_fid = copy->hc_hai.hai_fid;
 840         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 841         hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
 842         hpk.hpk_extent.length = 0;
 843         hpk.hpk_flags = 0;
 844         hpk.hpk_errval = 0;
 845         hpk.hpk_data_version = 0;
 846
 847
 848         /* For archive request, we need to read the current file version. */
 849         if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
 850                 struct inode    *inode;
 851                 __u64            data_version = 0;
 852
 853                 /* Get inode for this fid */
 854                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 855                 if (IS_ERR(inode)) {
 856                         hpk.hpk_flags |= HP_FLAG_RETRY;
 857                         /* hpk_errval is >= 0 */
 858                         hpk.hpk_errval = -PTR_ERR(inode);
 859                         GOTO(progress, rc = PTR_ERR(inode));
 860                 }
 861
 862                 /* Read current file data version */
 863                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 864                 iput(inode);
 865                 if (rc != 0) {
 866                         CDEBUG(D_HSM, "Could not read file data version of "
 867                                       DFID" (rc = %d). Archive request ("
 868                                       "%#llx) could not be done.\n",
 869                                       PFID(&copy->hc_hai.hai_fid), rc,
 870                                       copy->hc_hai.hai_cookie);
 871                         hpk.hpk_flags |= HP_FLAG_RETRY;
 872                         /* hpk_errval must be >= 0 */
 873                         hpk.hpk_errval = -rc;
 874                         GOTO(progress, rc);
 875                 }
 876
 877                 /* Store in the hsm_copy for later copytool use.
 878                  * Always modified even if no lsm. */
 879                 copy->hc_data_version = data_version;
 880         }
 881
 882 progress:
 883         /* On error, the request should be considered as completed */
 884         if (hpk.hpk_errval > 0)
 885                 hpk.hpk_flags |= HP_FLAG_COMPLETED;
 886
 887         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 888                             &hpk, NULL);
 889
 890         /* Return first error */
 891         RETURN(rc != 0 ? rc : rc2);
 892 }
 893
 894 /**
 895  * Generic handler to do any post-copy work.
 896  *
 897  * It will send the last hsm_progress update to coordinator to inform it
 898  * that copy is finished and whether it was successful or not.
 899  *
 900  * Moreover,
 901  * - for ARCHIVE request, it will sample the file data version and compare it
 902  *   with the version saved in ll_ioc_copy_start(). If they do not match, copy
 903  *   will be considered as failed.
 904  * - for RESTORE request, it will sample the file data version and send it to
 905  *   coordinator which is useful if the file was imported as 'released'.
 906  *
 907  * \return 0 on success.
 908  */
 909 static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
 910 {
 911         struct ll_sb_info               *sbi = ll_s2sbi(sb);
 912         struct hsm_progress_kernel       hpk;
 913         int                              rc = 0;
 914         int                              rc2;
 915         ENTRY;
 916
 917         /* If you modify the logic here, also check llapi_hsm_copy_end(). */
 918         /* Take care: copy->hc_hai.hai_action, len, gid and data are not
 919          * initialized if copy_end was called with copy == NULL.
 920          */
 921
 922         /* Forge a hsm_progress based on data from copy. */
 923         hpk.hpk_fid = copy->hc_hai.hai_fid;
 924         hpk.hpk_cookie = copy->hc_hai.hai_cookie;
 925         hpk.hpk_extent = copy->hc_hai.hai_extent;
 926         hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
 927         hpk.hpk_errval = copy->hc_errval;
 928         hpk.hpk_data_version = 0;
 929
 930         /* For archive request, we need to check the file data was not changed.
 931          *
 932          * For restore request, we need to send the file data version, this is
 933          * useful when the file was created using hsm_import.
 934          */
 935         if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
 936              (copy->hc_hai.hai_action == HSMA_RESTORE)) &&
 937             (copy->hc_errval == 0)) {
 938                 struct inode    *inode;
 939                 __u64            data_version = 0;
 940
 941                 /* Get lsm for this fid */
 942                 inode = search_inode_for_lustre(sb, &copy->hc_hai.hai_fid);
 943                 if (IS_ERR(inode)) {
 944                         hpk.hpk_flags |= HP_FLAG_RETRY;
 945                         /* hpk_errval must be >= 0 */
 946                         hpk.hpk_errval = -PTR_ERR(inode);
 947                         GOTO(progress, rc = PTR_ERR(inode));
 948                 }
 949
 950                 rc = ll_data_version(inode, &data_version, LL_DV_RD_FLUSH);
 951                 iput(inode);
 952                 if (rc) {
 953                         CDEBUG(D_HSM, "Could not read file data version. "
 954                                       "Request could not be confirmed.\n");
 955                         if (hpk.hpk_errval == 0)
 956                                 hpk.hpk_errval = -rc;
 957                         GOTO(progress, rc);
 958                 }
 959
 960                 /* Store in the hsm_copy for later copytool use.
 961                  * Always modified even if no lsm. */
 962                 hpk.hpk_data_version = data_version;
 963
 964                 /* File could have been stripped during archiving, so we need
 965                  * to check anyway. */
 966                 if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
 967                     (copy->hc_data_version != data_version)) {
 968                         CDEBUG(D_HSM, "File data version mismatched. "
 969                               "File content was changed during archiving. "
 970                                DFID", start:%#llx current:%#llx\n",
 971                                PFID(&copy->hc_hai.hai_fid),
 972                                copy->hc_data_version, data_version);
 973                         /* File was changed, send error to cdt. Do not ask for
 974                          * retry because if a file is modified frequently,
 975                          * the cdt will loop on retried archive requests.
 976                          * The policy engine will ask for a new archive later
 977                          * when the file will not be modified for some tunable
 978                          * time */
 979                         hpk.hpk_flags &= ~HP_FLAG_RETRY;
 980                         rc = -EBUSY;
 981                         /* hpk_errval must be >= 0 */
 982                         hpk.hpk_errval = -rc;
 983                         GOTO(progress, rc);
 984                 }
 985
 986         }
 987
 988 progress:
 989         rc2 = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
 990                             &hpk, NULL);
 991
 992         /* Return first error */
 993         RETURN(rc != 0 ? rc : rc2);
 994 }
 995
 996
 997 static int copy_and_ct_start(int cmd, struct obd_export *exp,
 998                              const struct lustre_kernelcomm __user *data)
 999 {
1000         struct lustre_kernelcomm *lk;
1001         struct lustre_kernelcomm *tmp;
1002         size_t size = sizeof(*lk);
1003         size_t new_size;
1004         int i;
1005         int rc;
1006
1007         /* copy data from userspace to get numbers of archive_id */
1008         OBD_ALLOC(lk, size);
1009         if (lk == NULL)
1010                 return -ENOMEM;
1011
1012         if (copy_from_user(lk, data, size))
1013                 GOTO(out_lk, rc = -EFAULT);
1014
1015         if (lk->lk_flags & LK_FLG_STOP)
1016                 goto do_ioctl;
1017
1018         if (!(lk->lk_flags & LK_FLG_DATANR)) {
1019                 __u32 archive_mask = lk->lk_data_count;
1020                 int count;
1021
1022                 /* old hsm agent to old MDS */
1023                 if (!exp_connect_archive_id_array(exp))
1024                         goto do_ioctl;
1025
1026                 /* old hsm agent to new MDS */
1027                 lk->lk_flags |= LK_FLG_DATANR;
1028
1029                 if (archive_mask == 0)
1030                         goto do_ioctl;
1031
1032                 count = hweight32(archive_mask);
1033                 new_size = offsetof(struct lustre_kernelcomm, lk_data[count]);
1034                 OBD_ALLOC(tmp, new_size);
1035                 if (tmp == NULL)
1036                         GOTO(out_lk, rc = -ENOMEM);
1037
1038                 memcpy(tmp, lk, size);
1039                 tmp->lk_data_count = count;
1040                 OBD_FREE(lk, size);
1041                 lk = tmp;
1042                 size = new_size;
1043
1044                 count = 0;
1045                 for (i = 0; i < sizeof(archive_mask) * 8; i++) {
1046                         if ((1 << i) & archive_mask) {
1047                                 lk->lk_data[count] = i + 1;
1048                                 count++;
1049                         }
1050                 }
1051                 goto do_ioctl;
1052         }
1053
1054         /* new hsm agent to new mds */
1055         if (lk->lk_data_count > 0) {
1056                 new_size = offsetof(struct lustre_kernelcomm,
1057                                     lk_data[lk->lk_data_count]);
1058                 OBD_ALLOC(tmp, new_size);
1059                 if (tmp == NULL)
1060                         GOTO(out_lk, rc = -ENOMEM);
1061
1062                 OBD_FREE(lk, size);
1063                 lk = tmp;
1064                 size = new_size;
1065
1066                 if (copy_from_user(lk, data, size))
1067                         GOTO(out_lk, rc = -EFAULT);
1068         }
1069
1070         /* new hsm agent to old MDS */
1071         if (!exp_connect_archive_id_array(exp)) {
1072                 __u32 archives = 0;
1073
1074                 if (lk->lk_data_count > LL_HSM_ORIGIN_MAX_ARCHIVE)
1075                         GOTO(out_lk, rc = -EINVAL);
1076
1077                 for (i = 0; i < lk->lk_data_count; i++) {
1078                         if (lk->lk_data[i] > LL_HSM_ORIGIN_MAX_ARCHIVE) {
1079                                 rc = -EINVAL;
1080                                 CERROR("%s: archive id %d requested but only "
1081                                        "[0 - %zu] supported: rc = %d\n",
1082                                        exp->exp_obd->obd_name, lk->lk_data[i],
1083                                        LL_HSM_ORIGIN_MAX_ARCHIVE, rc);
1084                                 GOTO(out_lk, rc);
1085                         }
1086
1087                         if (lk->lk_data[i] == 0) {
1088                                 archives = 0;
1089                                 break;
1090                         }
1091
1092                         archives |= (1 << (lk->lk_data[i] - 1));
1093                 }
1094                 lk->lk_flags &= ~LK_FLG_DATANR;
1095                 lk->lk_data_count = archives;
1096         }
1097 do_ioctl:
1098         rc = obd_iocontrol(cmd, exp, size, lk, NULL);
1099 out_lk:
1100         OBD_FREE(lk, size);
1101         return rc;
1102 }
1103
1104 static int check_owner(int type, int id)
1105 {
1106         switch (type) {
1107         case USRQUOTA:
1108                 if (!uid_eq(current_euid(), make_kuid(&init_user_ns, id)))
1109                         return -EPERM;
1110                 break;
1111         case GRPQUOTA:
1112                 if (!in_egroup_p(make_kgid(&init_user_ns, id)))
1113                         return -EPERM;
1114                 break;
1115         case PRJQUOTA:
1116                 break;
1117         }
1118         return 0;
1119 }
1120
1121 static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
1122 {
1123         int cmd = qctl->qc_cmd;
1124         int type = qctl->qc_type;
1125         int id = qctl->qc_id;
1126         int valid = qctl->qc_valid;
1127         int rc = 0;
1128         ENTRY;
1129
1130         switch (cmd) {
1131         case Q_SETQUOTA:
1132         case Q_SETINFO:
1133         case LUSTRE_Q_SETDEFAULT:
1134                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1135                         RETURN(-EPERM);
1136                 break;
1137         case Q_GETQUOTA:
1138         case LUSTRE_Q_GETDEFAULT:
1139                 if (check_owner(type, id) &&
1140                     (!cfs_capable(CFS_CAP_SYS_ADMIN)))
1141                         RETURN(-EPERM);
1142                 break;
1143         case Q_GETINFO:
1144                 break;
1145         default:
1146                 CERROR("unsupported quotactl op: %#x\n", cmd);
1147                 RETURN(-ENOTSUPP);
1148         }
1149
1150         if (valid != QC_GENERAL) {
1151                 if (cmd == Q_GETINFO)
1152                         qctl->qc_cmd = Q_GETOINFO;
1153                 else if (cmd == Q_GETQUOTA)
1154                         qctl->qc_cmd = Q_GETOQUOTA;
1155                 else
1156                         RETURN(-EINVAL);
1157
1158                 switch (valid) {
1159                 case QC_MDTIDX:
1160                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1161                                            sizeof(*qctl), qctl, NULL);
1162                         break;
1163                 case QC_OSTIDX:
1164                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
1165                                            sizeof(*qctl), qctl, NULL);
1166                         break;
1167                 case QC_UUID:
1168                         rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
1169                                            sizeof(*qctl), qctl, NULL);
1170                         if (rc == -EAGAIN)
1171                                 rc = obd_iocontrol(OBD_IOC_QUOTACTL,
1172                                                    sbi->ll_dt_exp,
1173                                                    sizeof(*qctl), qctl, NULL);
1174                         break;
1175                 default:
1176                         rc = -EINVAL;
1177                         break;
1178                 }
1179
1180                 if (rc)
1181                         RETURN(rc);
1182
1183                 qctl->qc_cmd = cmd;
1184         } else {
1185                 struct obd_quotactl *oqctl;
1186
1187                 OBD_ALLOC_PTR(oqctl);
1188                 if (oqctl == NULL)
1189                         RETURN(-ENOMEM);
1190
1191                 QCTL_COPY(oqctl, qctl);
1192                 rc = obd_quotactl(sbi->ll_md_exp, oqctl);
1193                 if (rc) {
1194                         OBD_FREE_PTR(oqctl);
1195                         RETURN(rc);
1196                 }
1197                 /* If QIF_SPACE is not set, client should collect the
1198                  * space usage from OSSs by itself */
1199                 if (cmd == Q_GETQUOTA &&
1200                     !(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
1201                     !oqctl->qc_dqblk.dqb_curspace) {
1202                         struct obd_quotactl *oqctl_tmp;
1203
1204                         OBD_ALLOC_PTR(oqctl_tmp);
1205                         if (oqctl_tmp == NULL)
1206                                 GOTO(out, rc = -ENOMEM);
1207
1208                         oqctl_tmp->qc_cmd = Q_GETOQUOTA;
1209                         oqctl_tmp->qc_id = oqctl->qc_id;
1210                         oqctl_tmp->qc_type = oqctl->qc_type;
1211
1212                         /* collect space usage from OSTs */
1213                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1214                         rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
1215                         if (!rc || rc == -EREMOTEIO) {
1216                                 oqctl->qc_dqblk.dqb_curspace =
1217                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1218                                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1219                         }
1220
1221                         /* collect space & inode usage from MDTs */
1222                         oqctl_tmp->qc_dqblk.dqb_curspace = 0;
1223                         oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
1224                         rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
1225                         if (!rc || rc == -EREMOTEIO) {
1226                                 oqctl->qc_dqblk.dqb_curspace +=
1227                                         oqctl_tmp->qc_dqblk.dqb_curspace;
1228                                 oqctl->qc_dqblk.dqb_curinodes =
1229                                         oqctl_tmp->qc_dqblk.dqb_curinodes;
1230                                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1231                         } else {
1232                                 oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
1233                         }
1234
1235                         OBD_FREE_PTR(oqctl_tmp);
1236                 }
1237 out:
1238                 QCTL_COPY(qctl, oqctl);
1239                 OBD_FREE_PTR(oqctl);
1240         }
1241
1242         RETURN(rc);
1243 }
1244
1245 int ll_rmfid(struct file *file, void __user *arg)
1246 {
1247         const struct fid_array __user *ufa = arg;
1248         struct fid_array *lfa = NULL;
1249         size_t size;
1250         unsigned nr;
1251         int i, rc, *rcs = NULL;
1252         ENTRY;
1253
1254         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
1255             !(ll_i2sbi(file_inode(file))->ll_flags & LL_SBI_USER_FID2PATH))
1256                 RETURN(-EPERM);
1257         /* Only need to get the buflen */
1258         if (get_user(nr, &ufa->fa_nr))
1259                 RETURN(-EFAULT);
1260         /* DoS protection */
1261         if (nr > OBD_MAX_FIDS_IN_ARRAY)
1262                 RETURN(-E2BIG);
1263
1264         size = offsetof(struct fid_array, fa_fids[nr]);
1265         OBD_ALLOC(lfa, size);
1266         if (!lfa)
1267                 RETURN(-ENOMEM);
1268         OBD_ALLOC(rcs, sizeof(int) * nr);
1269         if (!rcs)
1270                 GOTO(free_lfa, rc = -ENOMEM);
1271
1272         if (copy_from_user(lfa, arg, size))
1273                 GOTO(free_rcs, rc = -EFAULT);
1274
1275         /* Call mdc_iocontrol */
1276         rc = md_rmfid(ll_i2mdexp(file_inode(file)), lfa, rcs, NULL);
1277         if (!rc) {
1278                 for (i = 0; i < nr; i++)
1279                         if (rcs[i])
1280                                 lfa->fa_fids[i].f_ver = rcs[i];
1281                 if (copy_to_user(arg, lfa, size))
1282                         rc = -EFAULT;
1283         }
1284
1285 free_rcs:
1286         OBD_FREE(rcs, sizeof(int) * nr);
1287 free_lfa:
1288         OBD_FREE(lfa, size);
1289
1290         RETURN(rc);
1291 }
1292
1293 /* This function tries to get a single name component,
1294  * to send to the server. No actual path traversal involved,
1295  * so we limit to NAME_MAX */
1296 static char *ll_getname(const char __user *filename)
1297 {
1298         int ret = 0, len;
1299         char *tmp;
1300
1301         OBD_ALLOC(tmp, NAME_MAX + 1);
1302
1303         if (!tmp)
1304                 return ERR_PTR(-ENOMEM);
1305
1306         len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
1307         if (len < 0)
1308                 ret = -ENOENT;
1309         else if (len > NAME_MAX)
1310                 ret = -ENAMETOOLONG;
1311
1312         if (ret) {
1313                 OBD_FREE(tmp, NAME_MAX + 1);
1314                 tmp =  ERR_PTR(ret);
1315         }
1316         return tmp;
1317 }
1318
1319 #define ll_putname(filename) OBD_FREE(filename, NAME_MAX + 1);
1320
1321 static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1322 {
1323         struct dentry *dentry = file_dentry(file);
1324         struct inode *inode = file_inode(file);
1325         struct ll_sb_info *sbi = ll_i2sbi(inode);
1326         struct obd_ioctl_data *data;
1327         int rc = 0;
1328         ENTRY;
1329
1330         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), cmd=%#x\n",
1331                PFID(ll_inode2fid(inode)), inode, cmd);
1332
1333         /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
1334         if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
1335                 return -ENOTTY;
1336
1337         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
1338         switch (cmd) {
1339         case FS_IOC_GETFLAGS:
1340         case FS_IOC_SETFLAGS:
1341                 RETURN(ll_iocontrol(inode, file, cmd, arg));
1342         case FSFILT_IOC_GETVERSION:
1343         case FS_IOC_GETVERSION:
1344                 RETURN(put_user(inode->i_generation, (int __user *)arg));
1345         /* We need to special case any other ioctls we want to handle,
1346          * to send them to the MDS/OST as appropriate and to properly
1347          * network encode the arg field. */
1348         case FS_IOC_SETVERSION:
1349                 RETURN(-ENOTSUPP);
1350
1351         case LL_IOC_GET_MDTIDX: {
1352                 int mdtidx;
1353
1354                 mdtidx = ll_get_mdt_idx(inode);
1355                 if (mdtidx < 0)
1356                         RETURN(mdtidx);
1357
1358                 if (put_user((int)mdtidx, (int __user *)arg))
1359                         RETURN(-EFAULT);
1360
1361                 return 0;
1362         }
1363         case IOC_MDC_LOOKUP: {
1364                                      int namelen, len = 0;
1365                 char *buf = NULL;
1366                 char *filename;
1367
1368                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1369                 if (rc != 0)
1370                         RETURN(rc);
1371                 data = (void *)buf;
1372
1373                 filename = data->ioc_inlbuf1;
1374                 namelen = strlen(filename);
1375                 if (namelen < 1) {
1376                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1377                         GOTO(out_free, rc = -EINVAL);
1378                 }
1379
1380                 rc = ll_get_fid_by_name(inode, filename, namelen, NULL, NULL);
1381                 if (rc < 0) {
1382                         CERROR("%s: lookup %.*s failed: rc = %d\n",
1383                                sbi->ll_fsname, namelen, filename, rc);
1384                         GOTO(out_free, rc);
1385                 }
1386 out_free:
1387                 OBD_FREE_LARGE(buf, len);
1388                 return rc;
1389         }
1390         case LL_IOC_LMV_SETSTRIPE: {
1391                 struct lmv_user_md  *lum;
1392                 char            *buf = NULL;
1393                 char            *filename;
1394                 int              namelen = 0;
1395                 int              lumlen = 0;
1396                 umode_t          mode;
1397                 int              len;
1398                 int              rc;
1399
1400                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
1401                 if (rc)
1402                         RETURN(rc);
1403
1404                 data = (void *)buf;
1405                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
1406                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
1407                         GOTO(lmv_out_free, rc = -EINVAL);
1408
1409                 filename = data->ioc_inlbuf1;
1410                 namelen = data->ioc_inllen1;
1411
1412                 if (namelen < 1) {
1413                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
1414                         GOTO(lmv_out_free, rc = -EINVAL);
1415                 }
1416                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
1417                 lumlen = data->ioc_inllen2;
1418
1419                 if (!lmv_user_magic_supported(lum->lum_magic)) {
1420                         CERROR("%s: wrong lum magic %x : rc = %d\n", filename,
1421                                lum->lum_magic, -EINVAL);
1422                         GOTO(lmv_out_free, rc = -EINVAL);
1423                 }
1424
1425                 if ((lum->lum_magic == LMV_USER_MAGIC ||
1426                      lum->lum_magic == LMV_USER_MAGIC_SPECIFIC) &&
1427                     lumlen < sizeof(*lum)) {
1428                         CERROR("%s: wrong lum size %d for magic %x : rc = %d\n",
1429                                filename, lumlen, lum->lum_magic, -EINVAL);
1430                         GOTO(lmv_out_free, rc = -EINVAL);
1431                 }
1432
1433                 if (lum->lum_magic == LMV_MAGIC_FOREIGN &&
1434                     lumlen < sizeof(struct lmv_foreign_md)) {
1435                         CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
1436                                filename, lum->lum_magic, lumlen, -EFAULT);
1437                         GOTO(lmv_out_free, rc = -EINVAL);
1438                 }
1439
1440                 mode = data->ioc_type;
1441                 rc = ll_dir_setdirstripe(dentry, lum, lumlen, filename, mode);
1442 lmv_out_free:
1443                 OBD_FREE_LARGE(buf, len);
1444                 RETURN(rc);
1445
1446         }
1447         case LL_IOC_LMV_SET_DEFAULT_STRIPE: {
1448                 struct lmv_user_md        lum;
1449                 struct lmv_user_md __user *ulump =
1450                                         (struct lmv_user_md __user *)arg;
1451                 int                       rc;
1452
1453                 if (copy_from_user(&lum, ulump, sizeof(lum)))
1454                         RETURN(-EFAULT);
1455
1456                 if (lum.lum_magic != LMV_USER_MAGIC)
1457                         RETURN(-EINVAL);
1458
1459                 rc = ll_dir_setstripe(inode, (struct lov_user_md *)&lum, 0);
1460
1461                 RETURN(rc);
1462         }
1463         case LL_IOC_LOV_SETSTRIPE_NEW:
1464         case LL_IOC_LOV_SETSTRIPE: {
1465                 struct lov_user_md_v3 *lumv3 = NULL;
1466                 struct lov_user_md_v1 lumv1;
1467                 struct lov_user_md_v1 *lumv1_ptr = &lumv1;
1468                 struct lov_user_md_v1 __user *lumv1p =
1469                         (struct lov_user_md_v1 __user *)arg;
1470                 struct lov_user_md_v3 __user *lumv3p =
1471                         (struct lov_user_md_v3 __user *)arg;
1472                 int lum_size = 0;
1473
1474                 int set_default = 0;
1475
1476                 BUILD_BUG_ON(sizeof(struct lov_user_md_v3) <=
1477                              sizeof(struct lov_comp_md_v1));
1478                 BUILD_BUG_ON(sizeof(*lumv3) != sizeof(*lumv3p));
1479                 /* first try with v1 which is smaller than v3 */
1480                 if (copy_from_user(&lumv1, lumv1p, sizeof(lumv1)))
1481                         RETURN(-EFAULT);
1482
1483                 if (inode->i_sb->s_root == file_dentry(file))
1484                         set_default = 1;
1485
1486                 switch (lumv1.lmm_magic) {
1487                 case LOV_USER_MAGIC_V3:
1488                 case LOV_USER_MAGIC_SPECIFIC:
1489                         lum_size = ll_lov_user_md_size(&lumv1);
1490                         if (lum_size < 0)
1491                                 RETURN(lum_size);
1492                         OBD_ALLOC(lumv3, lum_size);
1493                         if (!lumv3)
1494                                 RETURN(-ENOMEM);
1495                         if (copy_from_user(lumv3, lumv3p, lum_size))
1496                                 GOTO(out, rc = -EFAULT);
1497                         lumv1_ptr = (struct lov_user_md_v1 *)lumv3;
1498                         break;
1499                 case LOV_USER_MAGIC_V1:
1500                         break;
1501                 default:
1502                         GOTO(out, rc = -ENOTSUPP);
1503                 }
1504
1505                 /* in v1 and v3 cases lumv1 points to data */
1506                 rc = ll_dir_setstripe(inode, lumv1_ptr, set_default);
1507 out:
1508                 if (lumv3)
1509                         OBD_FREE(lumv3, lum_size);
1510                 RETURN(rc);
1511         }
1512         case LL_IOC_LMV_GETSTRIPE: {
1513                 struct lmv_user_md __user *ulmv =
1514                                         (struct lmv_user_md __user *)arg;
1515                 struct lmv_user_md      lum;
1516                 struct ptlrpc_request   *request = NULL;
1517                 struct ptlrpc_request   *root_request = NULL;
1518                 union lmv_mds_md        *lmm = NULL;
1519                 int                     lmmsize;
1520                 u64                     valid = 0;
1521                 struct lmv_user_md      *tmp = NULL;
1522                 int                     mdt_index;
1523                 int                     lum_size;
1524                 int                     stripe_count;
1525                 int                     max_stripe_count;
1526                 int                     i;
1527                 int                     rc;
1528
1529                 if (copy_from_user(&lum, ulmv, sizeof(*ulmv)))
1530                         RETURN(-EFAULT);
1531
1532                 max_stripe_count = lum.lum_stripe_count;
1533                 /* lum_magic will indicate which stripe the ioctl will like
1534                  * to get, LMV_MAGIC_V1 is for normal LMV stripe, LMV_USER_MAGIC
1535                  * is for default LMV stripe */
1536                 if (lum.lum_magic == LMV_MAGIC_V1)
1537                         valid |= OBD_MD_MEA;
1538                 else if (lum.lum_magic == LMV_USER_MAGIC)
1539                         valid |= OBD_MD_DEFAULT_MEA;
1540                 else
1541                         RETURN(-EINVAL);
1542
1543                 rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmmsize,
1544                                               &request, &root_request, valid);
1545                 if (rc != 0)
1546                         GOTO(finish_req, rc);
1547
1548                 /* Get default LMV EA */
1549                 if (lum.lum_magic == LMV_USER_MAGIC) {
1550                         if (lmmsize > sizeof(*ulmv))
1551                                 GOTO(finish_req, rc = -EINVAL);
1552
1553                         if (copy_to_user(ulmv, lmm, lmmsize))
1554                                 GOTO(finish_req, rc = -EFAULT);
1555
1556                         GOTO(finish_req, rc);
1557                 }
1558
1559                 /* if foreign LMV case, fake stripes number */
1560                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1561                         struct lmv_foreign_md *lfm;
1562
1563                         lfm = (struct lmv_foreign_md *)lmm;
1564                         if (lfm->lfm_length < XATTR_SIZE_MAX -
1565                             offsetof(typeof(*lfm), lfm_value)) {
1566                                 __u32 size = lfm->lfm_length +
1567                                              offsetof(typeof(*lfm), lfm_value);
1568
1569                                 stripe_count = lmv_foreign_to_md_stripes(size);
1570                         } else {
1571                                 CERROR("invalid %d foreign size returned\n",
1572                                             lfm->lfm_length);
1573                                 return -EINVAL;
1574                         }
1575                 } else {
1576                         stripe_count = lmv_mds_md_stripe_count_get(lmm);
1577                 }
1578                 if (max_stripe_count < stripe_count) {
1579                         lum.lum_stripe_count = stripe_count;
1580                         if (copy_to_user(ulmv, &lum, sizeof(lum)))
1581                                 GOTO(finish_req, rc = -EFAULT);
1582                         GOTO(finish_req, rc = -E2BIG);
1583                 }
1584
1585                 /* enough room on user side and foreign case */
1586                 if (lmm->lmv_magic == LMV_MAGIC_FOREIGN) {
1587                         struct lmv_foreign_md *lfm;
1588                         __u32 size;
1589
1590                         lfm = (struct lmv_foreign_md *)lmm;
1591                         size = lfm->lfm_length +
1592                                offsetof(struct lmv_foreign_md, lfm_value);
1593                         if (copy_to_user(ulmv, lfm, size))
1594                                 GOTO(finish_req, rc = -EFAULT);
1595                         GOTO(finish_req, rc);
1596                 }
1597
1598                 lum_size = lmv_user_md_size(stripe_count,
1599                                             LMV_USER_MAGIC_SPECIFIC);
1600                 OBD_ALLOC(tmp, lum_size);
1601                 if (tmp == NULL)
1602                         GOTO(finish_req, rc = -ENOMEM);
1603
1604                 mdt_index = ll_get_mdt_idx(inode);
1605                 if (mdt_index < 0)
1606                         GOTO(out_tmp, rc = -ENOMEM);
1607
1608                 tmp->lum_magic = LMV_MAGIC_V1;
1609                 tmp->lum_stripe_count = 0;
1610                 tmp->lum_stripe_offset = mdt_index;
1611                 tmp->lum_hash_type = lmv_mds_md_hash_type_get(lmm);
1612                 for (i = 0; i < stripe_count; i++) {
1613                         struct lu_fid   fid;
1614
1615                         fid_le_to_cpu(&fid, &lmm->lmv_md_v1.lmv_stripe_fids[i]);
1616                         if (fid_is_sane(&fid)) {
1617                                 mdt_index = ll_get_mdt_idx_by_fid(sbi, &fid);
1618                                 if (mdt_index < 0)
1619                                         GOTO(out_tmp, rc = mdt_index);
1620
1621                                 tmp->lum_objects[i].lum_mds = mdt_index;
1622                                 tmp->lum_objects[i].lum_fid = fid;
1623                         }
1624
1625                         tmp->lum_stripe_count++;
1626                 }
1627
1628                 if (copy_to_user(ulmv, tmp, lum_size))
1629                         GOTO(out_tmp, rc = -EFAULT);
1630 out_tmp:
1631                 OBD_FREE(tmp, lum_size);
1632 finish_req:
1633                 ptlrpc_req_finished(request);
1634                 ptlrpc_req_finished(root_request);
1635                 return rc;
1636         }
1637
1638         case LL_IOC_REMOVE_ENTRY: {
1639                 char            *filename = NULL;
1640                 int              namelen = 0;
1641                 int              rc;
1642
1643                 /* Here is a little hack to avoid sending REINT_RMENTRY to
1644                  * unsupported server, which might crash the server(LU-2730),
1645                  * Because both LVB_TYPE and REINT_RMENTRY will be supported
1646                  * on 2.4, we use OBD_CONNECT_LVB_TYPE to detect whether the
1647                  * server will support REINT_RMENTRY XXX*/
1648                 if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_LVB_TYPE))
1649                         RETURN(-ENOTSUPP);
1650
1651                 filename = ll_getname((const char __user *)arg);
1652                 if (IS_ERR(filename))
1653                         RETURN(PTR_ERR(filename));
1654
1655                 namelen = strlen(filename);
1656                 if (namelen < 1)
1657                         GOTO(out_rmdir, rc = -EINVAL);
1658
1659                 rc = ll_rmdir_entry(inode, filename, namelen);
1660 out_rmdir:
1661                 if (filename)
1662                         ll_putname(filename);
1663                 RETURN(rc);
1664         }
1665         case LL_IOC_RMFID:
1666                 RETURN(ll_rmfid(file, (void __user *)arg));
1667         case LL_IOC_LOV_SWAP_LAYOUTS:
1668                 RETURN(-EPERM);
1669         case IOC_OBD_STATFS:
1670                 RETURN(ll_obd_statfs(inode, (void __user *)arg));
1671         case LL_IOC_LOV_GETSTRIPE:
1672         case LL_IOC_LOV_GETSTRIPE_NEW:
1673         case LL_IOC_MDC_GETINFO:
1674         case LL_IOC_MDC_GETINFO_OLD:
1675         case IOC_MDC_GETFILEINFO:
1676         case IOC_MDC_GETFILEINFO_OLD:
1677         case IOC_MDC_GETFILESTRIPE: {
1678                 struct ptlrpc_request *request = NULL;
1679                 struct ptlrpc_request *root_request = NULL;
1680                 struct lov_user_md __user *lump;
1681                 struct lov_mds_md *lmm = NULL;
1682                 struct mdt_body *body;
1683                 char *filename = NULL;
1684                 lstat_t __user *statp = NULL;
1685                 lstatx_t __user *stxp = NULL;
1686                 __u64 __user *flagsp = NULL;
1687                 __u32 __user *lmmsizep = NULL;
1688                 struct lu_fid __user *fidp = NULL;
1689                 int lmmsize;
1690
1691                 if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1692                     cmd == IOC_MDC_GETFILEINFO ||
1693                     cmd == IOC_MDC_GETFILESTRIPE) {
1694                         filename = ll_getname((const char __user *)arg);
1695                         if (IS_ERR(filename))
1696                                 RETURN(PTR_ERR(filename));
1697
1698                         rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
1699                                                       &lmmsize, &request);
1700                 } else {
1701                         rc = ll_dir_getstripe_default(inode, (void **)&lmm,
1702                                                       &lmmsize, &request,
1703                                                       &root_request, 0);
1704                 }
1705
1706                 if (request) {
1707                         body = req_capsule_server_get(&request->rq_pill,
1708                                                       &RMF_MDT_BODY);
1709                         LASSERT(body != NULL);
1710                 } else {
1711                         GOTO(out_req, rc);
1712                 }
1713
1714                 if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
1715                                        cmd == LL_IOC_MDC_GETINFO ||
1716                                        cmd == IOC_MDC_GETFILEINFO_OLD ||
1717                                        cmd == LL_IOC_MDC_GETINFO_OLD)) {
1718                         lmmsize = 0;
1719                         rc = 0;
1720                 }
1721
1722                 if (rc < 0)
1723                         GOTO(out_req, rc);
1724
1725                 if (cmd == IOC_MDC_GETFILESTRIPE ||
1726                     cmd == LL_IOC_LOV_GETSTRIPE ||
1727                     cmd == LL_IOC_LOV_GETSTRIPE_NEW) {
1728                         lump = (struct lov_user_md __user *)arg;
1729                 } else if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1730                            cmd == LL_IOC_MDC_GETINFO_OLD){
1731                         struct lov_user_mds_data_v1 __user *lmdp;
1732
1733                         lmdp = (struct lov_user_mds_data_v1 __user *)arg;
1734                         statp = &lmdp->lmd_st;
1735                         lump = &lmdp->lmd_lmm;
1736                 } else {
1737                         struct lov_user_mds_data __user *lmdp;
1738
1739                         lmdp = (struct lov_user_mds_data __user *)arg;
1740                         fidp = &lmdp->lmd_fid;
1741                         stxp = &lmdp->lmd_stx;
1742                         flagsp = &lmdp->lmd_flags;
1743                         lmmsizep = &lmdp->lmd_lmmsize;
1744                         lump = &lmdp->lmd_lmm;
1745                 }
1746
1747                 if (lmmsize == 0) {
1748                         /* If the file has no striping then zero out *lump so
1749                          * that the caller isn't confused by garbage. */
1750                         if (clear_user(lump, sizeof(*lump)))
1751                                 GOTO(out_req, rc = -EFAULT);
1752                 } else if (copy_to_user(lump, lmm, lmmsize)) {
1753                         if (copy_to_user(lump, lmm, sizeof(*lump)))
1754                                 GOTO(out_req, rc = -EFAULT);
1755                         rc = -EOVERFLOW;
1756                 }
1757
1758                 if (cmd == IOC_MDC_GETFILEINFO_OLD ||
1759                     cmd == LL_IOC_MDC_GETINFO_OLD) {
1760                         lstat_t st = { 0 };
1761
1762                         st.st_dev       = inode->i_sb->s_dev;
1763                         st.st_mode      = body->mbo_mode;
1764                         st.st_nlink     = body->mbo_nlink;
1765                         st.st_uid       = body->mbo_uid;
1766                         st.st_gid       = body->mbo_gid;
1767                         st.st_rdev      = body->mbo_rdev;
1768                         st.st_size      = body->mbo_size;
1769                         st.st_blksize   = PAGE_SIZE;
1770                         st.st_blocks    = body->mbo_blocks;
1771                         st.st_atime     = body->mbo_atime;
1772                         st.st_mtime     = body->mbo_mtime;
1773                         st.st_ctime     = body->mbo_ctime;
1774                         st.st_ino       = cl_fid_build_ino(&body->mbo_fid1,
1775                                                 sbi->ll_flags &
1776                                                 LL_SBI_32BIT_API);
1777
1778                         if (copy_to_user(statp, &st, sizeof(st)))
1779                                 GOTO(out_req, rc = -EFAULT);
1780                 } else if (cmd == IOC_MDC_GETFILEINFO ||
1781                            cmd == LL_IOC_MDC_GETINFO) {
1782                         lstatx_t stx = { 0 };
1783                         __u64 valid = body->mbo_valid;
1784
1785                         stx.stx_blksize = PAGE_SIZE;
1786                         stx.stx_nlink = body->mbo_nlink;
1787                         stx.stx_uid = body->mbo_uid;
1788                         stx.stx_gid = body->mbo_gid;
1789                         stx.stx_mode = body->mbo_mode;
1790                         stx.stx_ino = cl_fid_build_ino(&body->mbo_fid1,
1791                                                        sbi->ll_flags &
1792                                                        LL_SBI_32BIT_API);
1793                         stx.stx_size = body->mbo_size;
1794                         stx.stx_blocks = body->mbo_blocks;
1795                         stx.stx_atime.tv_sec = body->mbo_atime;
1796                         stx.stx_ctime.tv_sec = body->mbo_ctime;
1797                         stx.stx_mtime.tv_sec = body->mbo_mtime;
1798                         stx.stx_rdev_major = MAJOR(body->mbo_rdev);
1799                         stx.stx_rdev_minor = MINOR(body->mbo_rdev);
1800                         stx.stx_dev_major = MAJOR(inode->i_sb->s_dev);
1801                         stx.stx_dev_minor = MINOR(inode->i_sb->s_dev);
1802                         stx.stx_mask |= STATX_BASIC_STATS;
1803
1804                         /*
1805                          * For a striped directory, the size and blocks returned
1806                          * from MDT is not correct.
1807                          * The size and blocks are aggregated by client across
1808                          * all stripes.
1809                          * Thus for a striped directory, do not return the valid
1810                          * FLSIZE and FLBLOCKS flags to the caller.
1811                          * However, this whould be better decided by the MDS
1812                          * instead of the client.
1813                          */
1814                         if (cmd == LL_IOC_MDC_GETINFO &&
1815                             ll_i2info(inode)->lli_lsm_md != NULL)
1816                                 valid &= ~(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
1817
1818                         if (flagsp && copy_to_user(flagsp, &valid,
1819                                                    sizeof(*flagsp)))
1820                                 GOTO(out_req, rc = -EFAULT);
1821
1822                         if (fidp && copy_to_user(fidp, &body->mbo_fid1,
1823                                                  sizeof(*fidp)))
1824                                 GOTO(out_req, rc = -EFAULT);
1825
1826                         if (!(valid & OBD_MD_FLSIZE))
1827                                 stx.stx_mask &= ~STATX_SIZE;
1828                         if (!(valid & OBD_MD_FLBLOCKS))
1829                                 stx.stx_mask &= ~STATX_BLOCKS;
1830
1831                         if (stxp && copy_to_user(stxp, &stx, sizeof(stx)))
1832                                 GOTO(out_req, rc = -EFAULT);
1833
1834                         if (lmmsizep && copy_to_user(lmmsizep, &lmmsize,
1835                                                      sizeof(*lmmsizep)))
1836                                 GOTO(out_req, rc = -EFAULT);
1837                 }
1838
1839                 EXIT;
1840 out_req:
1841                 ptlrpc_req_finished(request);
1842                 ptlrpc_req_finished(root_request);
1843                 if (filename)
1844                         ll_putname(filename);
1845                 return rc;
1846         }
1847         case OBD_IOC_QUOTACTL: {
1848                 struct if_quotactl *qctl;
1849
1850                 OBD_ALLOC_PTR(qctl);
1851                 if (!qctl)
1852                         RETURN(-ENOMEM);
1853
1854                 if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl)))
1855                         GOTO(out_quotactl, rc = -EFAULT);
1856
1857                 rc = quotactl_ioctl(sbi, qctl);
1858
1859                 if (rc == 0 &&
1860                     copy_to_user((void __user *)arg, qctl, sizeof(*qctl)))
1861                         rc = -EFAULT;
1862
1863         out_quotactl:
1864                 OBD_FREE_PTR(qctl);
1865                 RETURN(rc);
1866         }
1867         case OBD_IOC_GETDTNAME:
1868         case OBD_IOC_GETMDNAME:
1869                 RETURN(ll_get_obd_name(inode, cmd, arg));
1870         case LL_IOC_FLUSHCTX:
1871                 RETURN(ll_flush_ctx(inode));
1872         case LL_IOC_GETOBDCOUNT: {
1873                 u32 count, vallen;
1874                 struct obd_export *exp;
1875
1876                 if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
1877                         RETURN(-EFAULT);
1878
1879                 /* get ost count when count is zero, get mdt count otherwise */
1880                 exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
1881                 vallen = sizeof(count);
1882                 rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
1883                                   KEY_TGT_COUNT, &vallen, &count);
1884                 if (rc) {
1885                         CERROR("get target count failed: %d\n", rc);
1886                         RETURN(rc);
1887                 }
1888
1889                 if (copy_to_user((int __user *)arg, &count, sizeof(int)))
1890                         RETURN(-EFAULT);
1891
1892                 RETURN(0);
1893         }
1894         case LL_IOC_PATH2FID:
1895                 if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
1896                                      sizeof(struct lu_fid)))
1897                         RETURN(-EFAULT);
1898                 RETURN(0);
1899         case LL_IOC_GET_CONNECT_FLAGS: {
1900                 RETURN(obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
1901                                      (void __user *)arg));
1902         }
1903         case OBD_IOC_FID2PATH:
1904                 RETURN(ll_fid2path(inode, (void __user *)arg));
1905         case LL_IOC_GETPARENT:
1906                 RETURN(ll_getparent(file, (void __user *)arg));
1907         case LL_IOC_FID2MDTIDX: {
1908                 struct obd_export *exp = ll_i2mdexp(inode);
1909                 struct lu_fid     fid;
1910                 __u32             index;
1911
1912                 if (copy_from_user(&fid, (const struct lu_fid __user *)arg,
1913                                    sizeof(fid)))
1914                         RETURN(-EFAULT);
1915
1916                 /* Call mdc_iocontrol */
1917                 rc = obd_iocontrol(LL_IOC_FID2MDTIDX, exp, sizeof(fid), &fid,
1918                                    (__u32 __user *)&index);
1919                 if (rc != 0)
1920                         RETURN(rc);
1921
1922                 RETURN(index);
1923         }
1924         case LL_IOC_HSM_REQUEST: {
1925                 struct hsm_user_request *hur;
1926                 ssize_t                  totalsize;
1927
1928                 OBD_ALLOC_PTR(hur);
1929                 if (hur == NULL)
1930                         RETURN(-ENOMEM);
1931
1932                 /* We don't know the true size yet; copy the fixed-size part */
1933                 if (copy_from_user(hur, (void __user *)arg, sizeof(*hur))) {
1934                         OBD_FREE_PTR(hur);
1935                         RETURN(-EFAULT);
1936                 }
1937
1938                 /* Compute the whole struct size */
1939                 totalsize = hur_len(hur);
1940                 OBD_FREE_PTR(hur);
1941                 if (totalsize < 0)
1942                         RETURN(-E2BIG);
1943
1944                 /* Final size will be more than double totalsize */
1945                 if (totalsize >= MDS_MAXREQSIZE / 3)
1946                         RETURN(-E2BIG);
1947
1948                 OBD_ALLOC_LARGE(hur, totalsize);
1949                 if (hur == NULL)
1950                         RETURN(-ENOMEM);
1951
1952                 /* Copy the whole struct */
1953                 if (copy_from_user(hur, (void __user *)arg, totalsize))
1954                         GOTO(out_hur, rc = -EFAULT);
1955
1956                 if (hur->hur_request.hr_action == HUA_RELEASE) {
1957                         const struct lu_fid *fid;
1958                         struct inode *f;
1959                         int i;
1960
1961                         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
1962                                 fid = &hur->hur_user_item[i].hui_fid;
1963                                 f = search_inode_for_lustre(inode->i_sb, fid);
1964                                 if (IS_ERR(f)) {
1965                                         rc = PTR_ERR(f);
1966                                         break;
1967                                 }
1968
1969                                 rc = ll_hsm_release(f);
1970                                 iput(f);
1971                                 if (rc != 0)
1972                                         break;
1973                         }
1974                 } else {
1975                         rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
1976                                            hur, NULL);
1977                 }
1978
1979 out_hur:
1980                 OBD_FREE_LARGE(hur, totalsize);
1981
1982                 RETURN(rc);
1983         }
1984         case LL_IOC_HSM_PROGRESS: {
1985                 struct hsm_progress_kernel      hpk;
1986                 struct hsm_progress             hp;
1987
1988                 if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
1989                         RETURN(-EFAULT);
1990
1991                 hpk.hpk_fid = hp.hp_fid;
1992                 hpk.hpk_cookie = hp.hp_cookie;
1993                 hpk.hpk_extent = hp.hp_extent;
1994                 hpk.hpk_flags = hp.hp_flags;
1995                 hpk.hpk_errval = hp.hp_errval;
1996                 hpk.hpk_data_version = 0;
1997
1998                 /* File may not exist in Lustre; all progress
1999                  * reported to Lustre root */
2000                 rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
2001                                    NULL);
2002                 RETURN(rc);
2003         }
2004         case LL_IOC_HSM_CT_START:
2005                 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2006                         RETURN(-EPERM);
2007
2008                 rc = copy_and_ct_start(cmd, sbi->ll_md_exp,
2009                                        (struct lustre_kernelcomm __user *)arg);
2010                 RETURN(rc);
2011
2012         case LL_IOC_HSM_COPY_START: {
2013                 struct hsm_copy *copy;
2014                 int              rc;
2015
2016                 OBD_ALLOC_PTR(copy);
2017                 if (copy == NULL)
2018                         RETURN(-ENOMEM);
2019                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2020                         OBD_FREE_PTR(copy);
2021                         RETURN(-EFAULT);
2022                 }
2023
2024                 rc = ll_ioc_copy_start(inode->i_sb, copy);
2025                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2026                         rc = -EFAULT;
2027
2028                 OBD_FREE_PTR(copy);
2029                 RETURN(rc);
2030         }
2031         case LL_IOC_HSM_COPY_END: {
2032                 struct hsm_copy *copy;
2033                 int              rc;
2034
2035                 OBD_ALLOC_PTR(copy);
2036                 if (copy == NULL)
2037                         RETURN(-ENOMEM);
2038                 if (copy_from_user(copy, (char __user *)arg, sizeof(*copy))) {
2039                         OBD_FREE_PTR(copy);
2040                         RETURN(-EFAULT);
2041                 }
2042
2043                 rc = ll_ioc_copy_end(inode->i_sb, copy);
2044                 if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
2045                         rc = -EFAULT;
2046
2047                 OBD_FREE_PTR(copy);
2048                 RETURN(rc);
2049         }
2050         case LL_IOC_MIGRATE: {
2051                 struct lmv_user_md *lum;
2052                 char *buf = NULL;
2053                 int len;
2054                 char *filename;
2055                 int namelen = 0;
2056                 int rc;
2057
2058                 rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
2059                 if (rc)
2060                         RETURN(rc);
2061
2062                 data = (struct obd_ioctl_data *)buf;
2063                 if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
2064                     data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0)
2065                         GOTO(migrate_free, rc = -EINVAL);
2066
2067                 filename = data->ioc_inlbuf1;
2068                 namelen = data->ioc_inllen1;
2069
2070                 if (namelen < 1 || namelen != strlen(filename) + 1) {
2071                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
2072                         GOTO(migrate_free, rc = -EINVAL);
2073                 }
2074
2075                 lum = (struct lmv_user_md *)data->ioc_inlbuf2;
2076                 if (lum->lum_magic != LMV_USER_MAGIC &&
2077                     lum->lum_magic != LMV_USER_MAGIC_SPECIFIC) {
2078                         rc = -EINVAL;
2079                         CERROR("%s: wrong lum magic %x: rc = %d\n",
2080                                filename, lum->lum_magic, rc);
2081                         GOTO(migrate_free, rc);
2082                 }
2083
2084                 rc = ll_migrate(inode, file, lum, filename);
2085 migrate_free:
2086                 OBD_FREE_LARGE(buf, len);
2087
2088                 RETURN(rc);
2089         }
2090         case LL_IOC_FSGETXATTR:
2091                 RETURN(ll_ioctl_fsgetxattr(inode, cmd, arg));
2092         case LL_IOC_FSSETXATTR:
2093                 RETURN(ll_ioctl_fssetxattr(inode, cmd, arg));
2094         case LL_IOC_PCC_DETACH_BY_FID: {
2095                 struct lu_pcc_detach_fid *detach;
2096                 struct lu_fid *fid;
2097                 struct inode *inode2;
2098                 unsigned long ino;
2099
2100                 OBD_ALLOC_PTR(detach);
2101                 if (detach == NULL)
2102                         RETURN(-ENOMEM);
2103
2104                 if (copy_from_user(detach,
2105                                    (const struct lu_pcc_detach_fid __user *)arg,
2106                                    sizeof(*detach)))
2107                         GOTO(out_detach, rc = -EFAULT);
2108
2109                 fid = &detach->pccd_fid;
2110                 ino = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
2111                 inode2 = ilookup5(inode->i_sb, ino, ll_test_inode_by_fid, fid);
2112                 if (inode2 == NULL)
2113                         /* Target inode is not in inode cache, and PCC file
2114                          * has aleady released, return immdiately.
2115                          */
2116                         GOTO(out_detach, rc = 0);
2117
2118                 if (!S_ISREG(inode2->i_mode))
2119                         GOTO(out_iput, rc = -EINVAL);
2120
2121                 if (!inode_owner_or_capable(inode2))
2122                         GOTO(out_iput, rc = -EPERM);
2123
2124                 rc = pcc_ioctl_detach(inode2, detach->pccd_opt);
2125 out_iput:
2126                 iput(inode2);
2127 out_detach:
2128                 OBD_FREE_PTR(detach);
2129                 RETURN(rc);
2130         }
2131         default:
2132                 RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
2133                                      (void __user *)arg));
2134         }
2135 }
2136
2137 static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
2138 {
2139         struct inode *inode = file->f_mapping->host;
2140         struct ll_file_data *fd = file->private_data;
2141         struct ll_sb_info *sbi = ll_i2sbi(inode);
2142         int api32 = ll_need_32bit_api(sbi);
2143         loff_t ret = -EINVAL;
2144         ENTRY;
2145
2146         inode_lock(inode);
2147         switch (origin) {
2148         case SEEK_SET:
2149                 break;
2150         case SEEK_CUR:
2151                 offset += file->f_pos;
2152                 break;
2153         case SEEK_END:
2154                 if (offset > 0)
2155                         GOTO(out, ret);
2156                 if (api32)
2157                         offset += LL_DIR_END_OFF_32BIT;
2158                 else
2159                         offset += LL_DIR_END_OFF;
2160                 break;
2161         default:
2162                 GOTO(out, ret);
2163         }
2164
2165         if (offset >= 0 &&
2166             ((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
2167              (!api32 && offset <= LL_DIR_END_OFF))) {
2168                 if (offset != file->f_pos) {
2169                         if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
2170                             (!api32 && offset == LL_DIR_END_OFF))
2171                                 fd->lfd_pos = MDS_DIR_END_OFF;
2172                         else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
2173                                 fd->lfd_pos = offset << 32;
2174                         else
2175                                 fd->lfd_pos = offset;
2176                         file->f_pos = offset;
2177                         file->f_version = 0;
2178                 }
2179                 ret = offset;
2180         }
2181         GOTO(out, ret);
2182
2183 out:
2184         inode_unlock(inode);
2185         return ret;
2186 }
2187
2188 static int ll_dir_open(struct inode *inode, struct file *file)
2189 {
2190         ENTRY;
2191         RETURN(ll_file_open(inode, file));
2192 }
2193
2194 static int ll_dir_release(struct inode *inode, struct file *file)
2195 {
2196         ENTRY;
2197         RETURN(ll_file_release(inode, file));
2198 }
2199
2200 const struct file_operations ll_dir_operations = {
2201         .llseek         = ll_dir_seek,
2202         .open           = ll_dir_open,
2203         .release        = ll_dir_release,
2204         .read           = generic_read_dir,
2205 #ifdef HAVE_DIR_CONTEXT
2206         .iterate_shared = ll_iterate,
2207 #else
2208         .readdir        = ll_readdir,
2209 #endif
2210         .unlocked_ioctl = ll_dir_ioctl,
2211         .fsync          = ll_fsync,
2212 };