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
  74         offset = page->index << PAGE_SHIFT;
  75         rc = mdc_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 mdc_readpage() */
  80                 LASSERT_REPSWABBED (request, 0); /* swabbed by mdc_readpage() */
  81
  82                 inode->i_size = body->size;
  83                 SetPageUptodate(page);
  84         }
  85         ptlrpc_req_finished(request);
  86
  87         unlock_page(page);
  88         EXIT;
  89         return rc;
  90 }
  91
  92 struct address_space_operations ll_dir_aops = {
  93         .readpage  = ll_dir_readpage,
  94 };
  95
  96 /*
  97  * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
  98  * more robust, but we have what we have
  99  */
 100 static inline unsigned ext2_chunk_size(struct inode *inode)
 101 {
 102         return inode->i_sb->s_blocksize;
 103 }
 104
 105 static inline void ext2_put_page(struct page *page)
 106 {
 107         kunmap(page);
 108         page_cache_release(page);
 109 }
 110
 111 static inline unsigned long dir_pages(struct inode *inode)
 112 {
 113         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 114 }
 115
 116
 117 static void ext2_check_page(struct page *page)
 118 {
 119         struct inode *dir = page->mapping->host;
 120         unsigned chunk_size = ext2_chunk_size(dir);
 121         char *kaddr = page_address(page);
 122         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 123         unsigned offs, rec_len;
 124         unsigned limit = PAGE_CACHE_SIZE;
 125         ext2_dirent *p;
 126         char *error;
 127
 128         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 129                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 130                 if (limit & (chunk_size - 1)) {
 131                         CERROR("limit %d dir size %lld index %ld\n",
 132                                limit, dir->i_size, page->index);
 133                         goto Ebadsize;
 134                 }
 135                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 136                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 137                         p->rec_len = cpu_to_le16(chunk_size);
 138                         p->name_len = 0;
 139                         p->inode = 0;
 140                 }
 141                 if (!limit)
 142                         goto out;
 143         }
 144         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 145                 p = (ext2_dirent *)(kaddr + offs);
 146                 rec_len = le16_to_cpu(p->rec_len);
 147
 148                 if (rec_len < EXT2_DIR_REC_LEN(1))
 149                         goto Eshort;
 150                 if (rec_len & 3)
 151                         goto Ealign;
 152                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 153                         goto Enamelen;
 154                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 155                         goto Espan;
 156                 //              if (le32_to_cpu(p->inode) > max_inumber)
 157                 //goto Einumber;
 158         }
 159         if (offs != limit)
 160                 goto Eend;
 161 out:
 162         SetPageChecked(page);
 163         return;
 164
 165         /* Too bad, we had an error */
 166
 167 Ebadsize:
 168         CERROR("ext2_check_page"
 169                 "size of directory #%lu is not a multiple of chunk size\n",
 170                 dir->i_ino
 171         );
 172         goto fail;
 173 Eshort:
 174         error = "rec_len is smaller than minimal";
 175         goto bad_entry;
 176 Ealign:
 177         error = "unaligned directory entry";
 178         goto bad_entry;
 179 Enamelen:
 180         error = "rec_len is too small for name_len";
 181         goto bad_entry;
 182 Espan:
 183         error = "directory entry across blocks";
 184         goto bad_entry;
 185         //Einumber:
 186         // error = "inode out of bounds";
 187 bad_entry:
 188         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 189                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 190                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 191                 (unsigned long) le32_to_cpu(p->inode),
 192                 rec_len, p->name_len);
 193         goto fail;
 194 Eend:
 195         p = (ext2_dirent *)(kaddr + offs);
 196         CERROR("ext2_check_page"
 197                 "entry in directory #%lu spans the page boundary"
 198                 "offset=%lu, inode=%lu",
 199                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 200                 (unsigned long) le32_to_cpu(p->inode));
 201 fail:
 202         SetPageChecked(page);
 203         SetPageError(page);
 204 }
 205
 206 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 207 {
 208         struct ldlm_res_id res_id =
 209                 { .name = { dir->i_ino, (__u64)dir->i_generation} };
 210         struct lustre_handle lockh;
 211         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_mdc_exp);
 212         struct address_space *mapping = dir->i_mapping;
 213         struct page *page;
 214         int rc;
 215
 216         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 217                              &res_id, LDLM_PLAIN, NULL, LCK_PR, &lockh);
 218         if (!rc) {
 219                 struct lookup_intent it = { .it_op = IT_READDIR };
 220                 struct ptlrpc_request *request;
 221                 struct mdc_op_data data;
 222
 223                 ll_prepare_mdc_op_data(&data, dir, NULL, NULL, 0, 0);
 224
 225                 rc = mdc_enqueue(ll_i2sbi(dir)->ll_mdc_exp, LDLM_PLAIN, &it,
 226                                  LCK_PR, &data, &lockh, NULL, 0,
 227                                  ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 228
 229                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 230                 if (request)
 231                         ptlrpc_req_finished(request);
 232                 if (rc < 0) {
 233                         CERROR("lock enqueue: rc: %d\n", rc);
 234                         return ERR_PTR(rc);
 235                 }
 236         }
 237         ldlm_lock_dump_handle(D_OTHER, &lockh);
 238
 239         page = read_cache_page(mapping, n,
 240                                (filler_t*)mapping->a_ops->readpage, NULL);
 241         if (!IS_ERR(page)) {
 242                 wait_on_page(page);
 243                 (void)kmap(page);
 244                 if (!PageUptodate(page))
 245                         goto fail;
 246                 if (!PageChecked(page))
 247                         ext2_check_page(page);
 248                 if (PageError(page))
 249                         goto fail;
 250         }
 251
 252 out_unlock:
 253         ldlm_lock_decref(&lockh, LCK_PR);
 254         return page;
 255
 256 fail:
 257         ext2_put_page(page);
 258         page = ERR_PTR(-EIO);
 259         goto out_unlock;
 260 }
 261
 262 /*
 263  * p is at least 6 bytes before the end of page
 264  */
 265 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 266 {
 267         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 268 }
 269
 270 static inline unsigned
 271 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 272 {
 273         ext2_dirent *de = (ext2_dirent*)(base + offset);
 274         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 275         while ((char*)p < (char*)de)
 276                 p = ext2_next_entry(p);
 277         return (char *)p - base;
 278 }
 279
 280 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 281         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 282         [EXT2_FT_REG_FILE]      DT_REG,
 283         [EXT2_FT_DIR]           DT_DIR,
 284         [EXT2_FT_CHRDEV]        DT_CHR,
 285         [EXT2_FT_BLKDEV]        DT_BLK,
 286         [EXT2_FT_FIFO]          DT_FIFO,
 287         [EXT2_FT_SOCK]          DT_SOCK,
 288         [EXT2_FT_SYMLINK]       DT_LNK,
 289 };
 290
 291
 292 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 293 {
 294         struct inode *inode = filp->f_dentry->d_inode;
 295         loff_t pos = filp->f_pos;
 296         // XXX struct super_block *sb = inode->i_sb;
 297         unsigned offset = pos & ~PAGE_CACHE_MASK;
 298         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 299         unsigned long npages = dir_pages(inode);
 300         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 301         unsigned char *types = NULL;
 302         int need_revalidate = (filp->f_version != inode->i_version);
 303         int rc = 0;
 304         ENTRY;
 305
 306         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 307                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 308
 309         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 310                 RETURN(0);
 311
 312         types = ext2_filetype_table;
 313
 314         for ( ; n < npages; n++, offset = 0) {
 315                 char *kaddr, *limit;
 316                 ext2_dirent *de;
 317                 struct page *page;
 318
 319                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 320                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 321                        n, npages, inode->i_size);
 322                 page = ll_get_dir_page(inode, n);
 323
 324                 /* size might have been updated by mdc_readpage */
 325                 npages = dir_pages(inode);
 326
 327                 if (IS_ERR(page)) {
 328                         rc = PTR_ERR(page);
 329                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 330                                inode->i_ino, inode->i_generation, n, rc);
 331                         continue;
 332                 }
 333
 334                 kaddr = page_address(page);
 335                 if (need_revalidate) {
 336                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 337                         need_revalidate = 0;
 338                 }
 339                 de = (ext2_dirent *)(kaddr+offset);
 340                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 341                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 342                         if (de->inode) {
 343                                 int over;
 344                                 unsigned char d_type = DT_UNKNOWN;
 345
 346                                 rc = 0; /* no error if we return something */
 347                                 if (types && de->file_type < EXT2_FT_MAX)
 348                                         d_type = types[de->file_type];
 349
 350                                 offset = (char *)de - kaddr;
 351                                 over = filldir(dirent, de->name, de->name_len,
 352                                                (n<<PAGE_CACHE_SHIFT) | offset,
 353                                                le32_to_cpu(de->inode), d_type);
 354                                 if (over) {
 355                                         ext2_put_page(page);
 356                                         GOTO(done, rc);
 357                                 }
 358                         }
 359                 }
 360                 ext2_put_page(page);
 361         }
 362
 363 done:
 364         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 365         filp->f_version = inode->i_version;
 366         update_atime(inode);
 367         RETURN(rc);
 368 }
 369
 370 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 371                         unsigned int cmd, unsigned long arg)
 372 {
 373         struct ll_sb_info *sbi = ll_i2sbi(inode);
 374         struct obd_ioctl_data *data;
 375         ENTRY;
 376
 377         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 378                inode->i_ino, inode->i_generation, inode, cmd);
 379
 380         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 381                 return -ENOTTY;
 382
 383         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 384         switch(cmd) {
 385         case EXT3_IOC_GETFLAGS:
 386         case EXT3_IOC_SETFLAGS:
 387                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 388         case EXT3_IOC_GETVERSION_OLD:
 389         case EXT3_IOC_GETVERSION:
 390                 RETURN(put_user(inode->i_generation, (int *)arg));
 391         /* We need to special case any other ioctls we want to handle,
 392          * to send them to the MDS/OST as appropriate and to properly
 393          * network encode the arg field.
 394         case EXT3_IOC_SETVERSION_OLD:
 395         case EXT3_IOC_SETVERSION:
 396         */
 397         case IOC_MDC_LOOKUP: {
 398                 struct ptlrpc_request *request = NULL;
 399                 struct ll_fid fid;
 400                 char *buf = NULL;
 401                 char *filename;
 402                 int namelen, rc, len = 0;
 403                 unsigned long valid;
 404
 405                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 406                 if (rc)
 407                         RETURN(rc);
 408                 data = (void *)buf;
 409
 410                 filename = data->ioc_inlbuf1;
 411                 namelen = data->ioc_inllen1;
 412
 413                 if (namelen < 1) {
 414                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 415                         GOTO(out, rc = -EINVAL);
 416                 }
 417
 418                 valid = OBD_MD_FLID;
 419                 ll_inode2fid(&fid, inode);
 420                 rc = mdc_getattr_name(sbi->ll_mdc_exp, &fid,
 421                                       filename, namelen, valid, 0, &request);
 422                 if (rc < 0) {
 423                         CDEBUG(D_INFO, "mdc_getattr_name: %d\n", rc);
 424                         GOTO(out, rc);
 425                 }
 426
 427                 ptlrpc_req_finished(request);
 428
 429                 EXIT;
 430         out:
 431                 obd_ioctl_freedata(buf, len);
 432                 return rc;
 433         }
 434         case LL_IOC_LOV_SETSTRIPE: {
 435                 struct ptlrpc_request *request = NULL;
 436                 struct mdc_op_data op_data;
 437                 struct iattr attr = { 0 };
 438                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 439                 int rc = 0;
 440
 441                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
 442
 443                 LASSERT(sizeof(lum) == sizeof(*lump));
 444                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 445                         sizeof(lump->lmm_objects[0]));
 446                 rc = copy_from_user(&lum, lump, sizeof(lum));
 447                 if (rc)
 448                         return(-EFAULT);
 449
 450                 if (lum.lmm_magic != LOV_USER_MAGIC)
 451                         RETURN(-EINVAL);
 452
 453                 rc = mdc_setattr(sbi->ll_mdc_exp, &op_data,
 454                                  &attr, &lum, sizeof(lum), NULL, 0, &request);
 455                 if (rc) {
 456                         ptlrpc_req_finished(request);
 457                         if (rc != -EPERM && rc != -EACCES)
 458                                 CERROR("mdc_setattr fails: rc = %d\n", rc);
 459                         return rc;
 460                 }
 461                 ptlrpc_req_finished(request);
 462
 463                 return rc;
 464         }
 465         case LL_IOC_LOV_GETSTRIPE: {
 466                 struct ptlrpc_request *request = NULL;
 467                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 468                 struct lov_mds_md *lmm;
 469                 struct ll_fid fid;
 470                 struct mds_body *body;
 471                 unsigned long valid = 0;
 472                 int rc, lmmsize;
 473
 474                 valid |= OBD_MD_FLDIREA;
 475
 476                 ll_inode2fid(&fid, inode);
 477                 rc = mdc_getattr(sbi->ll_mdc_exp, &fid, valid,
 478                                  obd_size_diskmd(sbi->ll_osc_exp, NULL),
 479                                  &request);
 480                 if (rc < 0) {
 481                         CDEBUG(D_INFO, "mdc_getattr failed: rc = %d\n", rc);
 482                         RETURN(rc);
 483                 }
 484
 485                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 486                 LASSERT(body != NULL);         /* checked by mdc_getattr_name */
 487                 LASSERT_REPSWABBED(request, 0);/* swabbed by mdc_getattr_name */
 488
 489                 lmmsize = body->eadatasize;
 490                 if (lmmsize == 0)
 491                         GOTO(out_get, rc = -ENODATA);
 492
 493                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 494                 LASSERT(lmm != NULL);
 495                 LASSERT_REPSWABBED(request, 1);
 496                 rc = copy_to_user(lump, lmm, lmmsize);
 497                 if (rc)
 498                         GOTO(out_get, rc = -EFAULT);
 499
 500                 EXIT;
 501         out_get:
 502                 ptlrpc_req_finished(request);
 503                 return rc;
 504         }
 505         case IOC_MDC_GETFILEINFO:
 506         case IOC_MDC_GETSTRIPE: {
 507                 struct ptlrpc_request *request = NULL;
 508                 struct ll_fid fid;
 509                 struct mds_body *body;
 510                 struct lov_user_md *lump;
 511                 struct lov_mds_md *lmm;
 512                 char *filename;
 513                 int rc, lmmsize;
 514
 515                 filename = getname((const char *)arg);
 516                 if (IS_ERR(filename))
 517                         RETURN(PTR_ERR(filename));
 518
 519                 ll_inode2fid(&fid, inode);
 520                 rc = mdc_getattr_name(sbi->ll_mdc_exp, &fid, filename,
 521                                       strlen(filename)+1, OBD_MD_FLEASIZE,
 522                                       obd_size_diskmd(sbi->ll_osc_exp, NULL),
 523                                       &request);
 524                 if (rc < 0) {
 525                         CDEBUG(D_INFO, "mdc_getattr_name failed on %s: rc %d\n",
 526                                filename, rc);
 527                         GOTO(out_name, rc);
 528                 }
 529
 530                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 531                 LASSERT(body != NULL);         /* checked by mdc_getattr_name */
 532                 LASSERT_REPSWABBED(request, 0);/* swabbed by mdc_getattr_name */
 533
 534                 lmmsize = body->eadatasize;
 535
 536                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 537                         GOTO(out_req, rc = -ENODATA);
 538
 539                 if (lmmsize > 4096)
 540                         GOTO(out_req, rc = -EFBIG);
 541
 542                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 543                 LASSERT(lmm != NULL);
 544                 LASSERT_REPSWABBED(request, 1);
 545
 546                 if (cmd == IOC_MDC_GETFILEINFO) {
 547                         struct lov_user_mds_data *lmdp;
 548                         lstat_t st = { 0 };
 549
 550                         st.st_dev     = 0;
 551                         st.st_mode    = body->mode;
 552                         st.st_nlink   = body->nlink;
 553                         st.st_uid     = body->uid;
 554                         st.st_gid     = body->gid;
 555                         st.st_rdev    = body->rdev;
 556                         st.st_size    = body->size;
 557                         st.st_blksize = PAGE_SIZE;
 558                         st.st_blocks  = body->blocks;
 559                         st.st_atime   = body->atime;
 560                         st.st_mtime   = body->mtime;
 561                         st.st_ctime   = body->ctime;
 562                         st.st_ino     = body->ino;
 563
 564                         lmdp = (struct lov_user_mds_data *)arg;
 565                         rc = copy_to_user(&lmdp->lmd_st, &st, sizeof(st));
 566                         if (rc)
 567                                 GOTO(out_req, rc = -EFAULT);
 568                         lump = &lmdp->lmd_lmm;
 569                 } else {
 570                         lump = (struct lov_user_md *)arg;
 571                 }
 572
 573                 rc = copy_to_user(lump, lmm, lmmsize);
 574                 if (rc)
 575                         GOTO(out_req, rc = -EFAULT);
 576
 577                 EXIT;
 578         out_req:
 579                 ptlrpc_req_finished(request);
 580         out_name:
 581                 putname(filename);
 582                 return rc;
 583         }
 584         case OBD_IOC_LLOG_CATINFO: {
 585                 struct ptlrpc_request *req = NULL;
 586                 char *buf = NULL;
 587                 int rc, len = 0;
 588                 char *bufs[2], *str;
 589                 int lens[2], size;
 590
 591                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 592                 if (rc)
 593                         RETURN(rc);
 594                 data = (void *)buf;
 595
 596                 if (!data->ioc_inlbuf1) {
 597                         obd_ioctl_freedata(buf, len);
 598                         RETURN(-EINVAL);
 599                 }
 600
 601                 lens[0] = data->ioc_inllen1;
 602                 bufs[0] = data->ioc_inlbuf1;
 603                 if (data->ioc_inllen2) {
 604                         lens[1] = data->ioc_inllen2;
 605                         bufs[1] = data->ioc_inlbuf2;
 606                 } else {
 607                         lens[1] = 0;
 608                         bufs[1] = NULL;
 609                 }
 610                 size = data->ioc_plen1;
 611                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import, LLOG_CATINFO,
 612                                       2, lens, bufs);
 613                 if (!req)
 614                         GOTO(out_catinfo, rc = -ENOMEM);
 615                 req->rq_replen = lustre_msg_size(1, &size);
 616
 617                 rc = ptlrpc_queue_wait(req);
 618                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 619                 if (!rc)
 620                         rc = copy_to_user(data->ioc_pbuf1, str,
 621                                           data->ioc_plen1);
 622                 ptlrpc_req_finished(req);
 623         out_catinfo:
 624                 obd_ioctl_freedata(buf, len);
 625                 RETURN(rc);
 626         }
 627         default:
 628                 return obd_iocontrol(cmd, sbi->ll_osc_exp,0,NULL,(void *)arg);
 629         }
 630 }
 631
 632 int ll_dir_open(struct inode *inode, struct file *file)
 633 {
 634         ENTRY;
 635         RETURN(ll_file_open(inode, file));
 636 }
 637
 638 int ll_dir_release(struct inode *inode, struct file *file)
 639 {
 640         ENTRY;
 641         RETURN(ll_file_release(inode, file));
 642 }
 643
 644 struct file_operations ll_dir_operations = {
 645         .open     = ll_dir_open,
 646         .release  = ll_dir_release,
 647         .read     = generic_read_dir,
 648         .readdir  = ll_readdir,
 649         .ioctl    = ll_dir_ioctl
 650 };
 651