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 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  37 # include <linux/locks.h>   // for wait_on_buffer
  38 #else
  39 # include <linux/buffer_head.h>   // for wait_on_buffer
  40 #endif
  41
  42 #define DEBUG_SUBSYSTEM S_LLITE
  43
  44 #include <linux/obd_support.h>
  45 #include <linux/obd_class.h>
  46 #include <linux/lustre_lib.h>
  47 #include <linux/lustre_idl.h>
  48 #include <linux/lustre_mds.h>
  49 #include <linux/lustre_lite.h>
  50 #include <linux/lustre_dlm.h>
  51 #include "llite_internal.h"
  52
  53 typedef struct ext2_dir_entry_2 ext2_dirent;
  54
  55 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  56 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  57
  58 /* returns the page unlocked, but with a reference */
  59 static int ll_dir_readpage(struct file *file, struct page *page)
  60 {
  61         struct inode *inode = page->mapping->host;
  62         struct ll_fid mdc_fid;
  63         __u64 offset;
  64         struct ptlrpc_request *request;
  65         struct mds_body *body;
  66         int rc = 0;
  67         ENTRY;
  68
  69         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
  70                inode->i_generation, inode);
  71
  72         mdc_pack_fid(&mdc_fid, inode->i_ino, inode->i_generation, S_IFDIR);
  73         mdc_fid.mds = ll_i2info(inode)->lli_mds;
  74         offset = page->index << PAGE_SHIFT;
  75         rc = md_readpage(ll_i2sbi(inode)->ll_mdc_exp, &mdc_fid,
  76                           offset, page, &request);
  77         if (!rc) {
  78                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
  79                 LASSERT (body != NULL); /* checked by md_readpage() */
  80                 LASSERT_REPSWABBED (request, 0);/*swabbed by md_readpage()*/
  81
  82 #warning "FIXME ASAP!"
  83                 //inode->i_size = body->size;
  84                 SetPageUptodate(page);
  85         }
  86         ptlrpc_req_finished(request);
  87
  88         unlock_page(page);
  89         EXIT;
  90         return rc;
  91 }
  92
  93 struct address_space_operations ll_dir_aops = {
  94         readpage: ll_dir_readpage,
  95 };
  96
  97 /*
  98  * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
  99  * more robust, but we have what we have
 100  */
 101 static inline unsigned ext2_chunk_size(struct inode *inode)
 102 {
 103         return inode->i_sb->s_blocksize;
 104 }
 105
 106 static inline void ext2_put_page(struct page *page)
 107 {
 108         kunmap(page);
 109         page_cache_release(page);
 110 }
 111
 112 static inline unsigned long dir_pages(struct inode *inode)
 113 {
 114         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 115 }
 116
 117
 118 static void ext2_check_page(struct page *page)
 119 {
 120         struct inode *dir = page->mapping->host;
 121         unsigned chunk_size = ext2_chunk_size(dir);
 122         char *kaddr = page_address(page);
 123         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 124         unsigned offs, rec_len;
 125         unsigned limit = PAGE_CACHE_SIZE;
 126         ext2_dirent *p;
 127         char *error;
 128
 129         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 130                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 131                 if (limit & (chunk_size - 1)) {
 132                         CERROR("limit %d dir size %lld index %ld\n",
 133                                limit, dir->i_size, page->index);
 134                         goto Ebadsize;
 135                 }
 136                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 137                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 138                         p->rec_len = cpu_to_le16(chunk_size);
 139                         p->name_len = 0;
 140                         p->inode = 0;
 141                 }
 142                 if (!limit)
 143                         goto out;
 144         }
 145         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 146                 p = (ext2_dirent *)(kaddr + offs);
 147                 rec_len = le16_to_cpu(p->rec_len);
 148
 149                 if (rec_len < EXT2_DIR_REC_LEN(1))
 150                         goto Eshort;
 151                 if (rec_len & 3)
 152                         goto Ealign;
 153                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 154                         goto Enamelen;
 155                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 156                         goto Espan;
 157                 //              if (le32_to_cpu(p->inode) > max_inumber)
 158                 //goto Einumber;
 159         }
 160         if (offs != limit)
 161                 goto Eend;
 162 out:
 163         SetPageChecked(page);
 164         return;
 165
 166         /* Too bad, we had an error */
 167
 168 Ebadsize:
 169         CERROR("ext2_check_page"
 170                 "size of directory #%lu is not a multiple of chunk size\n",
 171                 dir->i_ino
 172         );
 173         goto fail;
 174 Eshort:
 175         error = "rec_len is smaller than minimal";
 176         goto bad_entry;
 177 Ealign:
 178         error = "unaligned directory entry";
 179         goto bad_entry;
 180 Enamelen:
 181         error = "rec_len is too small for name_len";
 182         goto bad_entry;
 183 Espan:
 184         error = "directory entry across blocks";
 185         goto bad_entry;
 186         //Einumber:
 187         // error = "inode out of bounds";
 188 bad_entry:
 189         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 190                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 191                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 192                 (unsigned long) le32_to_cpu(p->inode),
 193                 rec_len, p->name_len);
 194         goto fail;
 195 Eend:
 196         p = (ext2_dirent *)(kaddr + offs);
 197         CERROR("ext2_check_page"
 198                 "entry in directory #%lu spans the page boundary"
 199                 "offset=%lu, inode=%lu",
 200                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 201                 (unsigned long) le32_to_cpu(p->inode));
 202 fail:
 203         SetPageChecked(page);
 204         SetPageError(page);
 205         LBUG();
 206 }
 207
 208 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 209 {
 210         struct ldlm_res_id res_id =
 211                 { .name = { dir->i_ino, (__u64)dir->i_generation} };
 212         struct lustre_handle lockh;
 213         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_mdc_exp);
 214         struct address_space *mapping = dir->i_mapping;
 215         struct page *page;
 216         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
 217         int rc;
 218
 219         obddev = md_get_real_obd(ll_i2sbi(dir)->ll_mdc_exp, NULL, 0);
 220         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 221                              &res_id, LDLM_IBITS, &policy, LCK_PR, &lockh);
 222         if (!rc) {
 223                 struct lookup_intent it = { .it_op = IT_READDIR };
 224                 struct ptlrpc_request *request;
 225                 struct mdc_op_data data;
 226
 227                 ll_prepare_mdc_op_data(&data, dir, NULL, NULL, 0, 0);
 228
 229                 rc = md_enqueue(ll_i2sbi(dir)->ll_mdc_exp, LDLM_IBITS, &it,
 230                                  LCK_PR, &data, &lockh, NULL, 0,
 231                                  ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 232
 233                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 234                 if (request)
 235                         ptlrpc_req_finished(request);
 236                 if (rc < 0) {
 237                         CERROR("lock enqueue: rc: %d\n", rc);
 238                         return ERR_PTR(rc);
 239                 }
 240         }
 241         ldlm_lock_dump_handle(D_OTHER, &lockh);
 242
 243         page = read_cache_page(mapping, n,
 244                                (filler_t*)mapping->a_ops->readpage, NULL);
 245         if (!IS_ERR(page)) {
 246                 wait_on_page(page);
 247                 (void)kmap(page);
 248                 if (!PageUptodate(page))
 249                         goto fail;
 250                 if (!PageChecked(page))
 251                         ext2_check_page(page);
 252                 if (PageError(page))
 253                         goto fail;
 254         }
 255
 256 out_unlock:
 257         ldlm_lock_decref(&lockh, LCK_PR);
 258         return page;
 259
 260 fail:
 261         ext2_put_page(page);
 262         page = ERR_PTR(-EIO);
 263         goto out_unlock;
 264 }
 265
 266 /*
 267  * p is at least 6 bytes before the end of page
 268  */
 269 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 270 {
 271         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 272 }
 273
 274 static inline unsigned
 275 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 276 {
 277         ext2_dirent *de = (ext2_dirent*)(base + offset);
 278         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 279         while ((char*)p < (char*)de)
 280                 p = ext2_next_entry(p);
 281         return (char *)p - base;
 282 }
 283
 284 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 285         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 286         [EXT2_FT_REG_FILE]      DT_REG,
 287         [EXT2_FT_DIR]           DT_DIR,
 288         [EXT2_FT_CHRDEV]        DT_CHR,
 289         [EXT2_FT_BLKDEV]        DT_BLK,
 290         [EXT2_FT_FIFO]          DT_FIFO,
 291         [EXT2_FT_SOCK]          DT_SOCK,
 292         [EXT2_FT_SYMLINK]       DT_LNK,
 293 };
 294
 295
 296 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 297 {
 298         struct inode *inode = filp->f_dentry->d_inode;
 299         loff_t pos = filp->f_pos;
 300         // XXX struct super_block *sb = inode->i_sb;
 301         unsigned offset = pos & ~PAGE_CACHE_MASK;
 302         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 303         unsigned long npages = dir_pages(inode);
 304         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 305         unsigned char *types = NULL;
 306         int need_revalidate = (filp->f_version != inode->i_version);
 307         int rc = 0;
 308         ENTRY;
 309
 310         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 311                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 312
 313         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 314                 RETURN(0);
 315
 316         types = ext2_filetype_table;
 317
 318         for ( ; n < npages; n++, offset = 0) {
 319                 char *kaddr, *limit;
 320                 ext2_dirent *de;
 321                 struct page *page;
 322
 323                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 324                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 325                        n, npages, inode->i_size);
 326                 page = ll_get_dir_page(inode, n);
 327
 328                 /* size might have been updated by md_readpage */
 329                 npages = dir_pages(inode);
 330
 331                 if (IS_ERR(page)) {
 332                         rc = PTR_ERR(page);
 333                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 334                                inode->i_ino, inode->i_generation, n, rc);
 335                         continue;
 336                 }
 337
 338                 kaddr = page_address(page);
 339                 if (need_revalidate) {
 340                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 341                         need_revalidate = 0;
 342                 }
 343                 de = (ext2_dirent *)(kaddr+offset);
 344                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 345                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 346                         if (de->inode) {
 347                                 int over;
 348                                 unsigned char d_type = DT_UNKNOWN;
 349
 350                                 rc = 0; /* no error if we return something */
 351                                 if (types && de->file_type < EXT2_FT_MAX)
 352                                         d_type = types[de->file_type];
 353
 354                                 offset = (char *)de - kaddr;
 355                                 over = filldir(dirent, de->name, de->name_len,
 356                                                (n<<PAGE_CACHE_SHIFT) | offset,
 357                                                le32_to_cpu(de->inode), d_type);
 358                                 if (over) {
 359                                         ext2_put_page(page);
 360                                         GOTO(done, rc);
 361                                 }
 362                         }
 363                 }
 364                 ext2_put_page(page);
 365         }
 366
 367 done:
 368         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 369         filp->f_version = inode->i_version;
 370         update_atime(inode);
 371         RETURN(rc);
 372 }
 373
 374 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 375 {
 376         char *name;
 377         struct ll_user_mkdir_stripe lums;
 378         struct ptlrpc_request *request = NULL;
 379         struct ll_sb_info *sbi = ll_i2sbi(inode);
 380         struct mdc_op_data op_data;
 381         u16 nstripes;
 382         mode_t mode;
 383         int err = 0;
 384         ENTRY;
 385
 386         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 387                 RETURN(-EFAULT);
 388
 389         if (lums.lums_namelen <= 0)
 390                 RETURN(-EINVAL);
 391         OBD_ALLOC(name, lums.lums_namelen);
 392         if (!name)
 393                 RETURN(-ENOMEM);
 394
 395         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 396                 GOTO(out, err=-EFAULT);
 397
 398         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 399                name, inode->i_ino, inode->i_generation, inode);
 400         nstripes = lums.lums_nstripes;
 401
 402         mode = lums.lums_mode;
 403         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 404         ll_prepare_mdc_op_data(&op_data, inode, NULL, name,lums.lums_namelen,0);
 405         err = md_create(sbi->ll_mdc_exp, &op_data, &nstripes, sizeof(nstripes),
 406                         mode, current->fsuid, current->fsgid, 0, &request);
 407         ptlrpc_req_finished(request);
 408
 409 out:
 410         OBD_FREE(name, lums.lums_namelen);
 411         RETURN(err);
 412 }
 413
 414 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 415                         unsigned int cmd, unsigned long arg)
 416 {
 417         struct ll_sb_info *sbi = ll_i2sbi(inode);
 418         struct obd_ioctl_data *data;
 419         ENTRY;
 420
 421         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 422                inode->i_ino, inode->i_generation, inode, cmd);
 423
 424         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 425                 return -ENOTTY;
 426
 427         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 428         switch(cmd) {
 429         case EXT3_IOC_GETFLAGS:
 430         case EXT3_IOC_SETFLAGS:
 431                 RETURN( ll_iocontrol(inode, file, cmd, arg) );
 432         case IOC_MDC_LOOKUP: {
 433                 struct ptlrpc_request *request = NULL;
 434                 struct ll_fid fid;
 435                 char *buf = NULL;
 436                 char *filename;
 437                 int namelen, rc, len = 0;
 438                 unsigned long valid;
 439
 440                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 441                 if (rc)
 442                         RETURN(rc);
 443                 data = (void *)buf;
 444
 445                 filename = data->ioc_inlbuf1;
 446                 namelen = data->ioc_inllen1;
 447
 448                 if (namelen < 1) {
 449                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 450                         GOTO(out, rc = -EINVAL);
 451                 }
 452
 453                 valid = OBD_MD_FLID;
 454                 ll_inode2fid(&fid, inode);
 455                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid,
 456                                           filename, namelen, valid,
 457                                           0, &request);
 458                 if (rc < 0) {
 459                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 460                         GOTO(out, rc);
 461                 }
 462
 463                 ptlrpc_req_finished(request);
 464
 465                 EXIT;
 466         out:
 467                 obd_ioctl_freedata(buf, len);
 468                 return rc;
 469         }
 470         case LL_IOC_MDC_MKDIRSTRIPE:
 471                 RETURN(ll_mkdir_stripe(inode, arg));
 472         case LL_IOC_LOV_SETSTRIPE:
 473         case LL_IOC_LOV_GETSTRIPE:
 474                 RETURN(-ENOTTY);
 475         case IOC_MDC_GETSTRIPE: {
 476                 struct ptlrpc_request *request = NULL;
 477                 struct ll_fid fid;
 478                 struct mds_body *body;
 479                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 480                 struct lov_mds_md *lmm;
 481                 char *filename;
 482                 int rc, lmmsize;
 483
 484                 filename = getname((const char *)arg);
 485                 if (IS_ERR(filename))
 486                         RETURN(PTR_ERR(filename));
 487
 488                 ll_inode2fid(&fid, inode);
 489                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid, filename,
 490                                           strlen(filename)+1, OBD_MD_FLEASIZE,
 491                                           obd_size_diskmd(sbi->ll_osc_exp, NULL),
 492                                           &request);
 493                 if (rc < 0) {
 494                         CDEBUG(D_INFO,
 495                                "md_getattr_name failed on %s: rc %d\n",
 496                                filename, rc);
 497                         GOTO(out_name, rc);
 498                 }
 499
 500                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 501                 LASSERT(body != NULL); /* checked by md_getattr_name */
 502                 LASSERT_REPSWABBED(request, 0);/* swabbed by mdc_getattr_name */
 503
 504                 lmmsize = body->eadatasize;
 505
 506                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 507                         GOTO(out_req, rc = -ENODATA);
 508
 509                 if (lmmsize > 4096)
 510                         GOTO(out_req, rc = -EFBIG);
 511
 512                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 513                 LASSERT(lmm != NULL);
 514                 LASSERT_REPSWABBED(request, 1);
 515
 516                 rc = copy_to_user(lump, lmm, lmmsize);
 517                 if (rc)
 518                         GOTO(out_req, rc = -EFAULT);
 519
 520                 EXIT;
 521         out_req:
 522                 ptlrpc_req_finished(request);
 523         out_name:
 524                 putname(filename);
 525                 return rc;
 526         }
 527         case OBD_IOC_PING: {
 528                 struct ptlrpc_request *req = NULL;
 529                 char *buf = NULL;
 530                 int rc, len=0;
 531                 struct client_obd *cli;
 532                 struct obd_device *obd;
 533
 534                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 535                 if (rc)
 536                         RETURN(rc);
 537                 data = (void *)buf;
 538
 539                 obd = class_name2obd(data->ioc_inlbuf1);
 540
 541                 if (!obd )
 542                         GOTO(out_ping, rc = -ENODEV);
 543
 544                 if (!obd->obd_attached) {
 545                         CERROR("Device %d not attached\n", obd->obd_minor);
 546                         GOTO(out_ping, rc = -ENODEV);
 547                 }
 548                 if (!obd->obd_set_up) {
 549                         CERROR("Device %d still not setup\n", obd->obd_minor);
 550                         GOTO(out_ping, rc = -ENODEV);
 551                 }
 552                 cli = &obd->u.cli;
 553                 req = ptlrpc_prep_req(cli->cl_import, OBD_PING, 0, NULL, NULL);
 554                 if (!req)
 555                         GOTO(out_ping, rc = -ENOMEM);
 556
 557                 req->rq_replen = lustre_msg_size(0, NULL);
 558                 req->rq_send_state = LUSTRE_IMP_FULL;
 559
 560                 rc = ptlrpc_queue_wait(req);
 561
 562                 ptlrpc_req_finished(req);
 563         out_ping:
 564                 obd_ioctl_freedata(buf, len);
 565                 return rc;
 566         }
 567         case OBD_IOC_LLOG_CATINFO: {
 568                 struct ptlrpc_request *req = NULL;
 569                 char *buf = NULL;
 570                 int rc, len = 0;
 571                 char *bufs[2], *str;
 572                 int lens[2], size;
 573
 574                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 575                 if (rc)
 576                         RETURN(rc);
 577                 data = (void *)buf;
 578
 579                 if (!data->ioc_inlbuf1) {
 580                         obd_ioctl_freedata(buf, len);
 581                         RETURN(-EINVAL);
 582                 }
 583
 584                 lens[0] = data->ioc_inllen1;
 585                 bufs[0] = data->ioc_inlbuf1;
 586                 if (data->ioc_inllen2) {
 587                         lens[1] = data->ioc_inllen2;
 588                         bufs[1] = data->ioc_inlbuf2;
 589                 } else {
 590                         lens[1] = 0;
 591                         bufs[1] = NULL;
 592                 }
 593                 size = data->ioc_plen1;
 594                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import, LLOG_CATINFO,
 595                                       2, lens, bufs);
 596                 if (!req)
 597                         GOTO(out_catinfo, rc = -ENOMEM);
 598                 req->rq_replen = lustre_msg_size(1, &size);
 599
 600                 rc = ptlrpc_queue_wait(req);
 601                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 602                 if (!rc)
 603                         rc = copy_to_user(data->ioc_pbuf1, str,
 604                                           data->ioc_plen1);
 605                 ptlrpc_req_finished(req);
 606         out_catinfo:
 607                 obd_ioctl_freedata(buf, len);
 608                 RETURN(rc);
 609         }
 610         default:
 611                 return obd_iocontrol(cmd, sbi->ll_osc_exp,0,NULL,(void *)arg);
 612         }
 613 }
 614
 615 int ll_dir_open(struct inode *inode, struct file *file)
 616 {
 617         return ll_file_open(inode, file);
 618 }
 619
 620 int ll_dir_release(struct inode *inode, struct file *file)
 621 {
 622         return ll_file_release(inode, file);
 623 }
 624
 625 struct file_operations ll_dir_operations = {
 626         open: ll_dir_open,
 627         release: ll_dir_release,
 628         read: generic_read_dir,
 629         readdir: ll_readdir,
 630         ioctl: ll_dir_ioctl
 631 };
 632