lustre/llite/dir.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/fs/minix/dir.c
  12  *  linux/fs/ext2/dir.c
  13  *
  14  *  Copyright (C) 1991, 1992  Linus Torvalds
  15  *
  16  *  ext2 directory handling functions
  17  *
  18  *  Big-endian to little-endian byte-swapping/bitmaps by
  19  *        David S. Miller (davem@caip.rutgers.edu), 1995
  20  *
  21  *  All code that works with directory layout had been switched to pagecache
  22  *  and moved here. AV
  23  *
  24  *  Adapted for Lustre Light
  25  *  Copyright (C) 2002-2003, Cluster File Systems, Inc.
  26  *
  27  */
  28
  29 #include <linux/fs.h>
  30 #include <linux/ext2_fs.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/mm.h>
  33 #include <linux/version.h>
  34 #include <linux/smp_lock.h>
  35 #include <asm/uaccess.h>
  36 #include <linux/file.h>
  37 #include <linux/kmod.h>
  38 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  39 # include <linux/locks.h>   // for wait_on_buffer
  40 #else
  41 # include <linux/buffer_head.h>   // for wait_on_buffer
  42 #endif
  43
  44 #define DEBUG_SUBSYSTEM S_LLITE
  45
  46 #include <linux/obd_support.h>
  47 #include <linux/obd_class.h>
  48 #include <linux/lustre_lib.h>
  49 #include <linux/lustre_idl.h>
  50 #include <linux/lustre_mds.h>
  51 #include <linux/lustre_lite.h>
  52 #include <linux/lustre_dlm.h>
  53 #include <linux/lustre_sec.h>
  54 #include <linux/lustre_acl.h>
  55 #include "llite_internal.h"
  56
  57 typedef struct ext2_dir_entry_2 ext2_dirent;
  58
  59 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  60 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  61
  62 /* returns the page unlocked, but with a reference */
  63 static int ll_dir_readpage(struct file *file, struct page *page)
  64 {
  65         struct inode *inode = page->mapping->host;
  66         struct ptlrpc_request *request;
  67         struct mds_body *body;
  68         struct lustre_id id;
  69         __u64 offset;
  70         int rc = 0;
  71         ENTRY;
  72
  73         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
  74                inode->i_generation, inode);
  75
  76         mdc_pack_id(&id, inode->i_ino, inode->i_generation,
  77                     S_IFDIR, id_group(&ll_i2info(inode)->lli_id),
  78                     id_fid(&ll_i2info(inode)->lli_id));
  79
  80         offset = page->index << PAGE_SHIFT;
  81         rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, &id, offset,
  82                          page, &request);
  83         if (!rc) {
  84                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
  85                 LASSERT (body != NULL);          /* checked by md_readpage() */
  86                 LASSERT_REPSWABBED (request, 0); /* swabbed by md_readpage() */
  87
  88 #warning "FIXME ASAP!"
  89                 //inode->i_size = body->size;
  90                 SetPageUptodate(page);
  91         }
  92         ptlrpc_req_finished(request);
  93
  94         unlock_page(page);
  95         RETURN(rc);
  96 }
  97
  98 struct address_space_operations ll_dir_aops = {
  99         .readpage  = ll_dir_readpage,
 100 };
 101
 102 /*
 103  * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
 104  * more robust, but we have what we have
 105  */
 106 static inline unsigned ext2_chunk_size(struct inode *inode)
 107 {
 108         return inode->i_sb->s_blocksize;
 109 }
 110
 111 static inline void ext2_put_page(struct page *page)
 112 {
 113         kunmap(page);
 114         page_cache_release(page);
 115 }
 116
 117 static inline unsigned long dir_pages(struct inode *inode)
 118 {
 119         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 120 }
 121
 122 static void ext2_check_page(struct page *page)
 123 {
 124         struct inode *dir = page->mapping->host;
 125         unsigned chunk_size = ext2_chunk_size(dir);
 126         char *kaddr = page_address(page);
 127         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 128         unsigned offs, rec_len;
 129         unsigned limit = PAGE_CACHE_SIZE;
 130         ext2_dirent *p;
 131         char *error;
 132
 133         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 134                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 135                 if (limit & (chunk_size - 1)) {
 136                         CERROR("limit %d dir size %lld index %ld\n",
 137                                limit, dir->i_size, page->index);
 138                         goto Ebadsize;
 139                 }
 140                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 141                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 142                         p->rec_len = cpu_to_le16(chunk_size);
 143                         p->name_len = 0;
 144                         p->inode = 0;
 145                 }
 146                 if (!limit)
 147                         goto out;
 148         }
 149         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 150                 p = (ext2_dirent *)(kaddr + offs);
 151                 rec_len = le16_to_cpu(p->rec_len);
 152
 153                 if (rec_len < EXT2_DIR_REC_LEN(1))
 154                         goto Eshort;
 155                 if (rec_len & 3)
 156                         goto Ealign;
 157                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 158                         goto Enamelen;
 159                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 160                         goto Espan;
 161                 //              if (le32_to_cpu(p->inode) > max_inumber)
 162                 //goto Einumber;
 163         }
 164         if (offs != limit)
 165                 goto Eend;
 166 out:
 167         SetPageChecked(page);
 168         return;
 169
 170         /* Too bad, we had an error */
 171
 172 Ebadsize:
 173         CERROR("ext2_check_page"
 174                 "size of directory #%lu is not a multiple of chunk size\n",
 175                 dir->i_ino
 176         );
 177         goto fail;
 178 Eshort:
 179         error = "rec_len is smaller than minimal";
 180         goto bad_entry;
 181 Ealign:
 182         error = "unaligned directory entry";
 183         goto bad_entry;
 184 Enamelen:
 185         error = "rec_len is too small for name_len";
 186         goto bad_entry;
 187 Espan:
 188         error = "directory entry across blocks";
 189         goto bad_entry;
 190         //Einumber:
 191         // error = "inode out of bounds";
 192 bad_entry:
 193         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 194                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 195                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 196                 (unsigned long) le32_to_cpu(p->inode),
 197                 rec_len, p->name_len);
 198         goto fail;
 199 Eend:
 200         p = (ext2_dirent *)(kaddr + offs);
 201         CERROR("ext2_check_page"
 202                 "entry in directory #%lu spans the page boundary"
 203                 "offset=%lu, inode=%lu",
 204                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 205                 (unsigned long) le32_to_cpu(p->inode));
 206 fail:
 207         SetPageChecked(page);
 208         SetPageError(page);
 209 }
 210
 211 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 212 {
 213         struct ll_inode_info *li = ll_i2info(dir);
 214         struct ldlm_res_id res_id =
 215                 { .name = { id_fid(&li->lli_id), id_group(&li->lli_id)} };
 216         struct lustre_handle lockh;
 217         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_md_exp);
 218         struct address_space *mapping = dir->i_mapping;
 219         struct page *page;
 220         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
 221         int rc;
 222
 223         obddev = md_get_real_obd(ll_i2sbi(dir)->ll_md_exp, &li->lli_id);
 224         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 225                              &res_id, LDLM_IBITS, &policy, LCK_PR, &lockh);
 226         if (!rc) {
 227                 struct lookup_intent it = { .it_op = IT_READDIR };
 228                 struct ptlrpc_request *request;
 229                 struct mdc_op_data *op_data;
 230
 231                 OBD_ALLOC(op_data, sizeof(*op_data));
 232                 if (op_data == NULL)
 233                         return ERR_PTR(-ENOMEM);
 234
 235                 ll_prepare_mdc_data(op_data, dir, NULL, NULL, 0, 0);
 236
 237                 rc = ll_intent_alloc(&it);
 238                 if (rc)
 239                         return ERR_PTR(rc);
 240
 241                 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, LDLM_IBITS, &it,
 242                                 LCK_PR, op_data, &lockh, NULL, 0,
 243                                 ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 244                 OBD_FREE(op_data, sizeof(*op_data));
 245
 246                 request = (struct ptlrpc_request *)LUSTRE_IT(&it)->it_data;
 247                 ll_intent_free(&it);
 248
 249                 if (request)
 250                         ptlrpc_req_finished(request);
 251                 if (rc < 0) {
 252                         CERROR("lock enqueue: rc: %d\n", rc);
 253                         return ERR_PTR(rc);
 254                 }
 255         } else {
 256                 if (ptlrpcs_check_cred(obddev->u.cli.cl_import)) {
 257                         /* return immediately if no credential held */
 258                         ldlm_lock_decref(&lockh, LCK_PR);
 259                         return ERR_PTR(-EACCES);
 260                 }
 261         }
 262         ldlm_lock_dump_handle(D_OTHER, &lockh);
 263
 264         page = read_cache_page(mapping, n,
 265                                (filler_t*)mapping->a_ops->readpage, NULL);
 266         if (!IS_ERR(page)) {
 267                 wait_on_page(page);
 268                 (void)kmap(page);
 269                 if (!PageUptodate(page))
 270                         goto fail;
 271                 if (!PageChecked(page))
 272                         ext2_check_page(page);
 273                 if (PageError(page))
 274                         goto fail;
 275         }
 276
 277 out_unlock:
 278         ldlm_lock_decref(&lockh, LCK_PR);
 279         return page;
 280
 281 fail:
 282         ext2_put_page(page);
 283         page = ERR_PTR(-EIO);
 284         goto out_unlock;
 285 }
 286
 287 /*
 288  * p is at least 6 bytes before the end of page
 289  */
 290 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 291 {
 292         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 293 }
 294
 295 static inline unsigned
 296 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 297 {
 298         ext2_dirent *de = (ext2_dirent*)(base + offset);
 299         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 300         while ((char*)p < (char*)de)
 301                 p = ext2_next_entry(p);
 302         return (char *)p - base;
 303 }
 304
 305 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 306         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 307         [EXT2_FT_REG_FILE]      DT_REG,
 308         [EXT2_FT_DIR]           DT_DIR,
 309         [EXT2_FT_CHRDEV]        DT_CHR,
 310         [EXT2_FT_BLKDEV]        DT_BLK,
 311         [EXT2_FT_FIFO]          DT_FIFO,
 312         [EXT2_FT_SOCK]          DT_SOCK,
 313         [EXT2_FT_SYMLINK]       DT_LNK,
 314 };
 315
 316
 317 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 318 {
 319         struct inode *inode = filp->f_dentry->d_inode;
 320         loff_t pos = filp->f_pos;
 321         // XXX struct super_block *sb = inode->i_sb;
 322         unsigned offset = pos & ~PAGE_CACHE_MASK;
 323         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 324         unsigned long npages = dir_pages(inode);
 325         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 326         unsigned char *types = ext2_filetype_table;
 327         int need_revalidate = (filp->f_version != inode->i_version);
 328         int rc = 0;
 329         ENTRY;
 330
 331         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 332                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 333
 334         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 335                 RETURN(0);
 336
 337         for ( ; n < npages; n++, offset = 0) {
 338                 char *kaddr, *limit;
 339                 ext2_dirent *de;
 340                 struct page *page;
 341
 342                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 343                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 344                        n, npages, inode->i_size);
 345                 page = ll_get_dir_page(inode, n);
 346
 347                 /* size might have been updated by md_readpage() */
 348                 npages = dir_pages(inode);
 349
 350                 if (IS_ERR(page)) {
 351                         rc = PTR_ERR(page);
 352                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 353                                inode->i_ino, inode->i_generation, n, rc);
 354                         continue;
 355                 }
 356
 357                 kaddr = page_address(page);
 358                 if (need_revalidate) {
 359                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 360                         need_revalidate = 0;
 361                 }
 362                 de = (ext2_dirent *)(kaddr+offset);
 363                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 364                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 365                         if (de->inode) {
 366                                 int over;
 367
 368                                 rc = 0; /* no error if we return something */
 369
 370                                 offset = (char *)de - kaddr;
 371                                 over = filldir(dirent, de->name, de->name_len,
 372                                                (n<<PAGE_CACHE_SHIFT) | offset,
 373                                                le32_to_cpu(de->inode),
 374                                                types[de->file_type &
 375                                                      (EXT2_FT_MAX - 1)]);
 376
 377                                 if (over) {
 378                                         ext2_put_page(page);
 379                                         GOTO(done, rc);
 380                                 }
 381                         }
 382                 }
 383                 ext2_put_page(page);
 384         }
 385
 386         EXIT;
 387 done:
 388         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 389         filp->f_version = inode->i_version;
 390         update_atime(inode);
 391         return rc;
 392 }
 393
 394 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 395 {
 396         struct ptlrpc_request *request = NULL;
 397         struct ll_sb_info *sbi = ll_i2sbi(inode);
 398         struct ll_user_mkdir_stripe lums;
 399         struct mdc_op_data *op_data;
 400         u16 nstripes;
 401         mode_t mode;
 402         char *name;
 403         int err = 0;
 404         ENTRY;
 405
 406         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 407                 RETURN(-EFAULT);
 408
 409         if (lums.lums_namelen <= 0)
 410                 RETURN(-EINVAL);
 411         OBD_ALLOC(name, lums.lums_namelen);
 412         if (!name)
 413                 RETURN(-ENOMEM);
 414
 415         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 416                 GOTO(out, err = -EFAULT);
 417
 418         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 419                name, inode->i_ino, inode->i_generation, inode);
 420         nstripes = lums.lums_nstripes;
 421
 422         mode = lums.lums_mode;
 423         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 424
 425         OBD_ALLOC(op_data, sizeof(*op_data));
 426         if (op_data == NULL)
 427                 GOTO(out, err = -ENOMEM);
 428         ll_prepare_mdc_data(op_data, inode, NULL, name,lums.lums_namelen,0);
 429         err = md_create(sbi->ll_md_exp, op_data, &nstripes, sizeof(nstripes),
 430                         mode, current->fsuid, current->fsgid, 0, &request);
 431         OBD_FREE(op_data, sizeof(*op_data));
 432         ptlrpc_req_finished(request);
 433         EXIT;
 434 out:
 435         OBD_FREE(name, lums.lums_namelen);
 436         return err;
 437 }
 438
 439 /*
 440  * we don't call getxattr_internal/setxattr_internal because we
 441  * need more precisely control.
 442  */
 443 static int ll_ioctl_getfacl(struct inode *inode,
 444                             struct file *file,
 445                             struct ll_acl_ioctl_data *ioc)
 446 {
 447         struct ptlrpc_request *req = NULL;
 448         struct mds_body *body;
 449         char *cmd, *res;
 450         struct lustre_id id;
 451         int rc;
 452         ENTRY;
 453
 454         if (!ioc->cmd || !ioc->cmd_len ||
 455             !ioc->res || !ioc->res_len) {
 456                 CERROR("error: cmd %p, len %lu, res %p, len %lu\n",
 457                        ioc->cmd, ioc->cmd_len, ioc->res, ioc->res_len);
 458                 RETURN(-EINVAL);
 459         }
 460
 461         OBD_ALLOC(cmd, ioc->cmd_len);
 462         if (!cmd)
 463                 RETURN(-ENOMEM);
 464         if (copy_from_user(cmd, ioc->cmd, ioc->cmd_len))
 465                 GOTO(out, rc = -EFAULT);
 466
 467         /* we didn't call ll_getxattr_internal() because we'd like to
 468          * copy from reply buffer to user space directly.
 469          */
 470         ll_inode2id(&id, inode);
 471         rc = md_getattr(ll_i2sbi(inode)->ll_md_exp, &id, OBD_MD_FLXATTR,
 472                         XATTR_NAME_LUSTRE_ACL,
 473                         cmd, ioc->cmd_len, ioc->res_len, &req);
 474         if (rc < 0) {
 475                 CERROR("rc: %d\n", rc);
 476                 GOTO(out, rc);
 477         }
 478
 479         res = lustre_msg_buf(req->rq_repmsg, 1, ioc->res_len);
 480         LASSERT(res);
 481         if (copy_to_user(ioc->res, res, ioc->res_len))
 482                 rc = -EFAULT;
 483
 484         body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 485         LASSERT(body);
 486         ioc->status = (__s32) body->flags;
 487
 488         EXIT;
 489 out:
 490         if (req)
 491                 ptlrpc_req_finished(req);
 492         OBD_FREE(cmd, ioc->cmd_len);
 493
 494         return rc;
 495 }
 496
 497 static int ll_ioctl_setfacl(struct inode *inode,
 498                             struct file *file,
 499                             struct ll_acl_ioctl_data *ioc)
 500 {
 501         struct ptlrpc_request *req = NULL;
 502         struct mdc_op_data op_data;
 503         struct mds_body *body;
 504         struct iattr attr;
 505         char *cmd;
 506         int replen, rc;
 507         ENTRY;
 508
 509         if (!ioc->cmd || !ioc->cmd_len) {
 510                 CERROR("error: cmd %p, len %lu\n", ioc->cmd, ioc->cmd_len);
 511                 RETURN(-EINVAL);
 512         }
 513
 514         OBD_ALLOC(cmd, ioc->cmd_len);
 515         if (!cmd)
 516                 RETURN(-ENOMEM);
 517         if (copy_from_user(cmd, ioc->cmd, ioc->cmd_len))
 518                 GOTO(out, rc = -EFAULT);
 519
 520         memset(&attr, 0x0, sizeof(attr));
 521         attr.ia_valid |= ATTR_EA;
 522         attr.ia_attr_flags = 0;
 523
 524         ll_prepare_mdc_data(&op_data, inode, NULL, NULL, 0, 0);
 525
 526         rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, &op_data, &attr,
 527                         (void*) XATTR_NAME_LUSTRE_ACL,
 528                         sizeof(XATTR_NAME_LUSTRE_ACL),
 529                         (void*) cmd, ioc->cmd_len, &req);
 530         if (rc) {
 531                 CERROR("md_setattr fails: rc = %d\n", rc);
 532                 GOTO(out, rc);
 533         }
 534
 535         body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 536         LASSERT(body);
 537         ioc->status = (__s32) body->flags;
 538
 539         LASSERT(req->rq_repmsg->bufcount == 2);
 540         replen = req->rq_repmsg->buflens[1];
 541         LASSERT(replen <= LUSTRE_ACL_SIZE_MAX);
 542         if (replen) {
 543                 if (replen > ioc->res_len)
 544                         replen = ioc->res_len;
 545                 if (copy_to_user(ioc->res,
 546                                  lustre_msg_buf(req->rq_repmsg, 1, replen),
 547                                  replen))
 548                         rc = -EFAULT;
 549         }
 550         EXIT;
 551 out:
 552         if (req)
 553                 ptlrpc_req_finished(req);
 554         OBD_FREE(cmd, ioc->cmd_len);
 555
 556         return rc;
 557 }
 558
 559 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 560                         unsigned int cmd, unsigned long arg)
 561 {
 562         struct ll_sb_info *sbi = ll_i2sbi(inode);
 563         struct obd_ioctl_data *data;
 564         ENTRY;
 565
 566         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 567                inode->i_ino, inode->i_generation, inode, cmd);
 568
 569         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 570                 return -ENOTTY;
 571
 572         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 573         switch(cmd) {
 574         case EXT3_IOC_GETFLAGS:
 575         case EXT3_IOC_SETFLAGS:
 576                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 577         case IOC_MDC_LOOKUP: {
 578                 struct ptlrpc_request *request = NULL;
 579                 struct lustre_id id;
 580                 char *buf = NULL;
 581                 char *filename;
 582                 int namelen, rc, len = 0;
 583                 __u64 valid;
 584
 585                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 586                 if (rc)
 587                         RETURN(rc);
 588                 data = (void *)buf;
 589
 590                 filename = data->ioc_inlbuf1;
 591                 namelen = data->ioc_inllen1;
 592
 593                 if (namelen < 1) {
 594                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 595                         GOTO(out, rc = -EINVAL);
 596                 }
 597
 598                 valid = OBD_MD_FLID;
 599                 ll_inode2id(&id, inode);
 600                 rc = md_getattr_lock(sbi->ll_md_exp, &id,
 601                                      filename, namelen, valid, 0, &request);
 602                 if (rc < 0) {
 603                         CDEBUG(D_INFO, "md_getattr_lock: %d\n", rc);
 604                         GOTO(out, rc);
 605                 }
 606
 607                 ptlrpc_req_finished(request);
 608
 609                 EXIT;
 610         out:
 611                 obd_ioctl_freedata(buf, len);
 612                 return rc;
 613         }
 614         case LL_IOC_MDC_MKDIRSTRIPE:
 615                 RETURN(ll_mkdir_stripe(inode, arg));
 616         case LL_IOC_LOV_SETSTRIPE: {
 617                 struct ptlrpc_request *request = NULL;
 618                 struct mdc_op_data *op_data;
 619                 struct iattr attr = { 0 };
 620                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 621                 int rc = 0;
 622
 623                 LASSERT(sizeof(lum) == sizeof(*lump));
 624                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 625                         sizeof(lump->lmm_objects[0]));
 626                 rc = copy_from_user(&lum, lump, sizeof(lum));
 627                 if (rc)
 628                         RETURN(-EFAULT);
 629
 630                 if (lum.lmm_magic != LOV_USER_MAGIC)
 631                         RETURN(-EINVAL);
 632
 633                 OBD_ALLOC(op_data, sizeof(*op_data));
 634                 if (op_data == NULL)
 635                         RETURN(-ENOMEM);
 636
 637                 ll_prepare_mdc_data(op_data, inode, NULL, NULL, 0, 0);
 638
 639                 rc = md_setattr(sbi->ll_md_exp, op_data, &attr, &lum,
 640                                 sizeof(lum), NULL, 0, &request);
 641                 OBD_FREE(op_data, sizeof(*op_data));
 642                 ptlrpc_req_finished(request);
 643
 644                 if (rc) {
 645                         if (rc != -EPERM && rc != -EACCES)
 646                                 CERROR("md_setattr fails: rc = %d\n", rc);
 647                 }
 648                 RETURN(rc);
 649         }
 650         case LL_IOC_LOV_GETSTRIPE: {
 651                 struct ptlrpc_request *request = NULL;
 652                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 653                 struct lov_mds_md *lmm;
 654                 struct lustre_id id;
 655                 struct mds_body *body;
 656                 __u64 valid = 0;
 657                 int rc, lmmsize;
 658
 659                 valid |= OBD_MD_FLDIREA;
 660
 661                 ll_inode2id(&id, inode);
 662                 rc = md_getattr(sbi->ll_md_exp, &id, valid, NULL, NULL, 0,
 663                                 obd_size_diskmd(sbi->ll_dt_exp, NULL),
 664                                 &request);
 665                 if (rc < 0) {
 666                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 667                         RETURN(rc);
 668                 }
 669
 670                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 671                 LASSERT(body != NULL);         /* checked by md_getattr_lock */
 672                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_lock */
 673
 674                 lmmsize = body->eadatasize;
 675                 if (lmmsize == 0)
 676                         GOTO(out_get, rc = -ENODATA);
 677
 678                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 679                 LASSERT(lmm != NULL);
 680                 LASSERT_REPSWABBED(request, 1);
 681                 rc = copy_to_user(lump, lmm, lmmsize);
 682                 if (rc)
 683                         GOTO(out_get, rc = -EFAULT);
 684
 685                 EXIT;
 686         out_get:
 687                 ptlrpc_req_finished(request);
 688                 RETURN(rc);
 689         }
 690         case IOC_MDC_SHOWFID: {
 691                 struct lustre_id *idp = (struct lustre_id *)arg;
 692                 struct lustre_id id;
 693                 char *filename;
 694                 int rc;
 695
 696                 filename = getname((const char *)arg);
 697                 if (IS_ERR(filename))
 698                         RETURN(PTR_ERR(filename));
 699
 700                 ll_inode2id(&id, inode);
 701
 702                 rc = ll_get_fid(sbi->ll_md_exp, &id, filename, &id);
 703                 if (rc < 0)
 704                         GOTO(out_filename, rc);
 705
 706                 rc = copy_to_user(idp, &id, sizeof(*idp));
 707                 if (rc)
 708                         GOTO(out_filename, rc = -EFAULT);
 709
 710                 EXIT;
 711         out_filename:
 712                 putname(filename);
 713                 return rc;
 714         }
 715         case IOC_MDC_GETSTRIPE: {
 716                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 717                 struct ptlrpc_request *request = NULL;
 718                 struct lov_mds_md *lmm;
 719                 struct mds_body *body;
 720                 struct lustre_id id;
 721                 char *filename;
 722                 int rc, lmmsize;
 723
 724                 filename = getname((const char *)arg);
 725                 if (IS_ERR(filename))
 726                         RETURN(PTR_ERR(filename));
 727
 728                 ll_inode2id(&id, inode);
 729                 rc = md_getattr_lock(sbi->ll_md_exp, &id, filename,
 730                                      strlen(filename) + 1, OBD_MD_FLEASIZE,
 731                                      obd_size_diskmd(sbi->ll_dt_exp, NULL),
 732                                      &request);
 733                 if (rc < 0) {
 734                         CDEBUG(D_INFO, "md_getattr_lock failed on %s: rc %d\n",
 735                                filename, rc);
 736                         GOTO(out_name, rc);
 737                 }
 738
 739                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 740                 LASSERT(body != NULL);         /* checked by md_getattr_lock */
 741                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_lock */
 742
 743                 lmmsize = body->eadatasize;
 744
 745                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 746                         GOTO(out_req, rc = -ENODATA);
 747
 748                 if (lmmsize > 4096)
 749                         GOTO(out_req, rc = -EFBIG);
 750
 751                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 752                 LASSERT(lmm != NULL);
 753                 LASSERT_REPSWABBED(request, 1);
 754
 755                 rc = copy_to_user(lump, lmm, lmmsize);
 756                 if (rc)
 757                         GOTO(out_req, rc = -EFAULT);
 758
 759                 EXIT;
 760         out_req:
 761                 ptlrpc_req_finished(request);
 762         out_name:
 763                 putname(filename);
 764                 return rc;
 765         }
 766         case OBD_IOC_PING: {
 767                 struct ptlrpc_request *req = NULL;
 768                 char *buf = NULL;
 769                 int rc, len=0;
 770                 struct client_obd *cli;
 771                 struct obd_device *obd;
 772
 773                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 774                 if (rc)
 775                         RETURN(rc);
 776                 data = (void *)buf;
 777
 778                 obd = class_name2obd(data->ioc_inlbuf1);
 779
 780                 if (!obd )
 781                         GOTO(out_ping, rc = -ENODEV);
 782
 783                 if (!obd->obd_attached) {
 784                         CERROR("Device %d not attached\n", obd->obd_minor);
 785                         GOTO(out_ping, rc = -ENODEV);
 786                 }
 787                 if (!obd->obd_set_up) {
 788                         CERROR("Device %d still not setup\n", obd->obd_minor);
 789                         GOTO(out_ping, rc = -ENODEV);
 790                 }
 791                 cli = &obd->u.cli;
 792                 req = ptlrpc_prep_req(cli->cl_import, LUSTRE_OBD_VERSION,
 793                                       OBD_PING, 0, NULL, NULL);
 794                 if (!req)
 795                         GOTO(out_ping, rc = -ENOMEM);
 796
 797                 req->rq_replen = lustre_msg_size(0, NULL);
 798                 req->rq_send_state = LUSTRE_IMP_FULL;
 799
 800                 rc = ptlrpc_queue_wait(req);
 801
 802                 ptlrpc_req_finished(req);
 803         out_ping:
 804                 obd_ioctl_freedata(buf, len);
 805                 return rc;
 806         }
 807         case OBD_IOC_LLOG_CATINFO: {
 808                 struct ptlrpc_request *req = NULL;
 809                 char *buf = NULL;
 810                 int rc, len = 0;
 811                 char *bufs[2], *str;
 812                 int lens[2], size;
 813
 814                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 815                 if (rc)
 816                         RETURN(rc);
 817                 data = (void *)buf;
 818
 819                 if (!data->ioc_inlbuf1) {
 820                         obd_ioctl_freedata(buf, len);
 821                         RETURN(-EINVAL);
 822                 }
 823
 824                 lens[0] = data->ioc_inllen1;
 825                 bufs[0] = data->ioc_inlbuf1;
 826                 if (data->ioc_inllen2) {
 827                         lens[1] = data->ioc_inllen2;
 828                         bufs[1] = data->ioc_inlbuf2;
 829                 } else {
 830                         lens[1] = 0;
 831                         bufs[1] = NULL;
 832                 }
 833                 size = data->ioc_plen1;
 834                 req = ptlrpc_prep_req(sbi2md(sbi)->cl_import,
 835                                       LUSTRE_LOG_VERSION, LLOG_CATINFO,
 836                                       2, lens, bufs);
 837                 if (!req)
 838                         GOTO(out_catinfo, rc = -ENOMEM);
 839
 840                 req->rq_replen = lustre_msg_size(1, &size);
 841
 842                 rc = ptlrpc_queue_wait(req);
 843                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 844                 if (!rc)
 845                         rc = copy_to_user(data->ioc_pbuf1, str,
 846                                           data->ioc_plen1);
 847                 ptlrpc_req_finished(req);
 848         out_catinfo:
 849                 obd_ioctl_freedata(buf, len);
 850                 RETURN(rc);
 851         }
 852         case LL_IOC_GETFACL: {
 853                 struct ll_acl_ioctl_data ioc, *uioc;
 854                 int rc;
 855
 856                 if (copy_from_user(&ioc, (void *) arg, sizeof(ioc)))
 857                         RETURN(-EFAULT);
 858
 859                 rc = ll_ioctl_getfacl(inode, file, &ioc);
 860                 if (!rc) {
 861                         uioc = (struct ll_acl_ioctl_data *) arg;
 862                         if (copy_to_user(&uioc->status, &ioc.status,
 863                                          sizeof(ioc.status)))
 864                                 rc = -EFAULT;
 865                 }
 866                 RETURN(rc);
 867         }
 868         case LL_IOC_SETFACL: {
 869                 struct ll_acl_ioctl_data ioc, *uioc;
 870                 int rc;
 871
 872                 if (copy_from_user(&ioc, (void *) arg, sizeof(ioc)))
 873                         RETURN(-EFAULT);
 874
 875                 rc = ll_ioctl_setfacl(inode, file, &ioc);
 876                 if (!rc) {
 877                         uioc = (struct ll_acl_ioctl_data *) arg;
 878                         if (copy_to_user(&uioc->status, &ioc.status,
 879                                          sizeof(ioc.status)))
 880                                 rc = -EFAULT;
 881                 }
 882                 RETURN(rc);
 883         }
 884         case LL_IOC_FLUSH_CRED:
 885                 RETURN(ll_flush_cred(inode));
 886         default:
 887                 return obd_iocontrol(cmd, sbi->ll_dt_exp, 0,
 888                                      NULL, (void *)arg);
 889         }
 890 }
 891
 892 int ll_dir_open(struct inode *inode, struct file *file)
 893 {
 894         return ll_file_open(inode, file);
 895 }
 896
 897 int ll_dir_release(struct inode *inode, struct file *file)
 898 {
 899         return ll_file_release(inode, file);
 900 }
 901
 902 struct file_operations ll_dir_operations = {
 903         .open     = ll_dir_open,
 904         .release  = ll_dir_release,
 905         .read     = generic_read_dir,
 906         .readdir  = ll_readdir,
 907         .ioctl    = ll_dir_ioctl
 908 };
 909