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 }
 206
 207 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 208 {
 209         struct ldlm_res_id res_id =
 210                 { .name = { dir->i_ino, (__u64)dir->i_generation} };
 211         struct lustre_handle lockh;
 212         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_mdc_exp);
 213         struct address_space *mapping = dir->i_mapping;
 214         struct page *page;
 215         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
 216         int rc;
 217
 218         obddev = md_get_real_obd(ll_i2sbi(dir)->ll_mdc_exp, NULL, 0);
 219         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 220                              &res_id, LDLM_IBITS, &policy, LCK_PR, &lockh);
 221         if (!rc) {
 222                 struct lookup_intent it = { .it_op = IT_READDIR };
 223                 struct ptlrpc_request *request;
 224                 struct mdc_op_data data;
 225
 226                 ll_prepare_mdc_op_data(&data, dir, NULL, NULL, 0, 0);
 227
 228                 rc = md_enqueue(ll_i2sbi(dir)->ll_mdc_exp, LDLM_IBITS, &it,
 229                                 LCK_PR, &data, &lockh, NULL, 0,
 230                                 ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 231
 232                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 233                 if (request)
 234                         ptlrpc_req_finished(request);
 235                 if (rc < 0) {
 236                         CERROR("lock enqueue: rc: %d\n", rc);
 237                         return ERR_PTR(rc);
 238                 }
 239         }
 240         ldlm_lock_dump_handle(D_OTHER, &lockh);
 241
 242         page = read_cache_page(mapping, n,
 243                                (filler_t*)mapping->a_ops->readpage, NULL);
 244         if (!IS_ERR(page)) {
 245                 wait_on_page(page);
 246                 (void)kmap(page);
 247                 if (!PageUptodate(page))
 248                         goto fail;
 249                 if (!PageChecked(page))
 250                         ext2_check_page(page);
 251                 if (PageError(page))
 252                         goto fail;
 253         }
 254
 255 out_unlock:
 256         ldlm_lock_decref(&lockh, LCK_PR);
 257         return page;
 258
 259 fail:
 260         ext2_put_page(page);
 261         page = ERR_PTR(-EIO);
 262         goto out_unlock;
 263 }
 264
 265 /*
 266  * p is at least 6 bytes before the end of page
 267  */
 268 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 269 {
 270         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 271 }
 272
 273 static inline unsigned
 274 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 275 {
 276         ext2_dirent *de = (ext2_dirent*)(base + offset);
 277         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 278         while ((char*)p < (char*)de)
 279                 p = ext2_next_entry(p);
 280         return (char *)p - base;
 281 }
 282
 283 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 284         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 285         [EXT2_FT_REG_FILE]      DT_REG,
 286         [EXT2_FT_DIR]           DT_DIR,
 287         [EXT2_FT_CHRDEV]        DT_CHR,
 288         [EXT2_FT_BLKDEV]        DT_BLK,
 289         [EXT2_FT_FIFO]          DT_FIFO,
 290         [EXT2_FT_SOCK]          DT_SOCK,
 291         [EXT2_FT_SYMLINK]       DT_LNK,
 292 };
 293
 294
 295 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 296 {
 297         struct inode *inode = filp->f_dentry->d_inode;
 298         loff_t pos = filp->f_pos;
 299         // XXX struct super_block *sb = inode->i_sb;
 300         unsigned offset = pos & ~PAGE_CACHE_MASK;
 301         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 302         unsigned long npages = dir_pages(inode);
 303         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 304         unsigned char *types = NULL;
 305         int need_revalidate = (filp->f_version != inode->i_version);
 306         int rc = 0;
 307         ENTRY;
 308
 309         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 310                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 311
 312         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 313                 RETURN(0);
 314
 315         types = ext2_filetype_table;
 316
 317         for ( ; n < npages; n++, offset = 0) {
 318                 char *kaddr, *limit;
 319                 ext2_dirent *de;
 320                 struct page *page;
 321
 322                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 323                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 324                        n, npages, inode->i_size);
 325                 page = ll_get_dir_page(inode, n);
 326
 327                 /* size might have been updated by md_readpage() */
 328                 npages = dir_pages(inode);
 329
 330                 if (IS_ERR(page)) {
 331                         rc = PTR_ERR(page);
 332                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 333                                inode->i_ino, inode->i_generation, n, rc);
 334                         continue;
 335                 }
 336
 337                 kaddr = page_address(page);
 338                 if (need_revalidate) {
 339                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 340                         need_revalidate = 0;
 341                 }
 342                 de = (ext2_dirent *)(kaddr+offset);
 343                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 344                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 345                         if (de->inode) {
 346                                 int over;
 347                                 unsigned char d_type = DT_UNKNOWN;
 348
 349                                 rc = 0; /* no error if we return something */
 350                                 if (types && de->file_type < EXT2_FT_MAX)
 351                                         d_type = types[de->file_type];
 352
 353                                 offset = (char *)de - kaddr;
 354                                 over = filldir(dirent, de->name, de->name_len,
 355                                                (n<<PAGE_CACHE_SHIFT) | offset,
 356                                                le32_to_cpu(de->inode), d_type);
 357                                 if (over) {
 358                                         ext2_put_page(page);
 359                                         GOTO(done, rc);
 360                                 }
 361                         }
 362                 }
 363                 ext2_put_page(page);
 364         }
 365
 366 done:
 367         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 368         filp->f_version = inode->i_version;
 369         update_atime(inode);
 370         RETURN(rc);
 371 }
 372
 373 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 374 {
 375         char *name;
 376         struct ll_user_mkdir_stripe lums;
 377         struct ptlrpc_request *request = NULL;
 378         struct ll_sb_info *sbi = ll_i2sbi(inode);
 379         struct mdc_op_data op_data;
 380         u16 nstripes;
 381         mode_t mode;
 382         int err = 0;
 383         ENTRY;
 384
 385         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 386                 RETURN(-EFAULT);
 387
 388         if (lums.lums_namelen <= 0)
 389                 RETURN(-EINVAL);
 390         OBD_ALLOC(name, lums.lums_namelen);
 391         if (!name)
 392                 RETURN(-ENOMEM);
 393
 394         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 395                 GOTO(out, err=-EFAULT);
 396
 397         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 398                name, inode->i_ino, inode->i_generation, inode);
 399         nstripes = lums.lums_nstripes;
 400
 401         mode = lums.lums_mode;
 402         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 403         ll_prepare_mdc_op_data(&op_data, inode, NULL, name,lums.lums_namelen,0);
 404         err = md_create(sbi->ll_mdc_exp, &op_data, &nstripes, sizeof(nstripes),
 405                         mode, current->fsuid, current->fsgid, 0, &request);
 406         ptlrpc_req_finished(request);
 407
 408 out:
 409         OBD_FREE(name, lums.lums_namelen);
 410         RETURN(err);
 411 }
 412
 413 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 414                         unsigned int cmd, unsigned long arg)
 415 {
 416         struct ll_sb_info *sbi = ll_i2sbi(inode);
 417         struct obd_ioctl_data *data;
 418         ENTRY;
 419
 420         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 421                inode->i_ino, inode->i_generation, inode, cmd);
 422
 423         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 424                 return -ENOTTY;
 425
 426         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 427         switch(cmd) {
 428         case EXT3_IOC_GETFLAGS:
 429         case EXT3_IOC_SETFLAGS:
 430                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 431         case IOC_MDC_LOOKUP: {
 432                 struct ptlrpc_request *request = NULL;
 433                 struct ll_fid fid;
 434                 char *buf = NULL;
 435                 char *filename;
 436                 int namelen, rc, len = 0;
 437                 unsigned long valid;
 438
 439                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 440                 if (rc)
 441                         RETURN(rc);
 442                 data = (void *)buf;
 443
 444                 filename = data->ioc_inlbuf1;
 445                 namelen = data->ioc_inllen1;
 446
 447                 if (namelen < 1) {
 448                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 449                         GOTO(out, rc = -EINVAL);
 450                 }
 451
 452                 valid = OBD_MD_FLID;
 453                 ll_inode2fid(&fid, inode);
 454                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid,
 455                                      filename, namelen, valid, 0, &request);
 456                 if (rc < 0) {
 457                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 458                         GOTO(out, rc);
 459                 }
 460
 461                 ptlrpc_req_finished(request);
 462
 463                 EXIT;
 464         out:
 465                 obd_ioctl_freedata(buf, len);
 466                 return rc;
 467         }
 468         case LL_IOC_MDC_MKDIRSTRIPE:
 469                 RETURN(ll_mkdir_stripe(inode, arg));
 470         case LL_IOC_LOV_SETSTRIPE: {
 471                 struct ptlrpc_request *request = NULL;
 472                 struct mdc_op_data op_data;
 473                 struct iattr attr = { 0 };
 474                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 475                 int rc = 0;
 476
 477                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
 478
 479                 LASSERT(sizeof(lum) == sizeof(*lump));
 480                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 481                         sizeof(lump->lmm_objects[0]));
 482                 rc = copy_from_user(&lum, lump, sizeof(lum));
 483                 if (rc)
 484                         return(-EFAULT);
 485
 486                 if (lum.lmm_magic != LOV_USER_MAGIC)
 487                         RETURN(-EINVAL);
 488
 489                 rc = md_setattr(sbi->ll_mdc_exp, &op_data,
 490                                 &attr, &lum, sizeof(lum), NULL, 0, &request);
 491                 if (rc) {
 492                         ptlrpc_req_finished(request);
 493                         if (rc != -EPERM && rc != -EACCES)
 494                                 CERROR("md_setattr fails: rc = %d\n", rc);
 495                         return rc;
 496                 }
 497                 ptlrpc_req_finished(request);
 498
 499                 return rc;
 500         }
 501         case LL_IOC_LOV_GETSTRIPE: {
 502                 struct ptlrpc_request *request = NULL;
 503                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 504                 struct lov_mds_md *lmm;
 505                 struct ll_fid fid;
 506                 struct mds_body *body;
 507                 unsigned long valid = 0;
 508                 int rc, lmmsize;
 509
 510                 valid |= OBD_MD_FLDIREA;
 511
 512                 ll_inode2fid(&fid, inode);
 513                 rc = md_getattr(sbi->ll_mdc_exp, &fid, valid,
 514                                 obd_size_diskmd(sbi->ll_osc_exp, NULL),
 515                                 &request);
 516                 if (rc < 0) {
 517                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 518                         RETURN(rc);
 519                 }
 520
 521                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 522                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 523                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 524
 525                 lmmsize = body->eadatasize;
 526                 if (lmmsize == 0)
 527                         GOTO(out_get, rc = -ENODATA);
 528
 529                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 530                 LASSERT(lmm != NULL);
 531                 LASSERT_REPSWABBED(request, 1);
 532                 rc = copy_to_user(lump, lmm, lmmsize);
 533                 if (rc)
 534                         GOTO(out_get, rc = -EFAULT);
 535
 536                 EXIT;
 537         out_get:
 538                 ptlrpc_req_finished(request);
 539                 RETURN(rc);
 540         }
 541         case IOC_MDC_GETSTRIPE: {
 542                 struct ptlrpc_request *request = NULL;
 543                 struct ll_fid fid;
 544                 struct mds_body *body;
 545                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 546                 struct lov_mds_md *lmm;
 547                 char *filename;
 548                 int rc, lmmsize;
 549
 550                 filename = getname((const char *)arg);
 551                 if (IS_ERR(filename))
 552                         RETURN(PTR_ERR(filename));
 553
 554                 ll_inode2fid(&fid, inode);
 555                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid, filename,
 556                                      strlen(filename) + 1, OBD_MD_FLEASIZE,
 557                                      obd_size_diskmd(sbi->ll_osc_exp, NULL),
 558                                      &request);
 559                 if (rc < 0) {
 560                         CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
 561                                filename, rc);
 562                         GOTO(out_name, rc);
 563                 }
 564
 565                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 566                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 567                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 568
 569                 lmmsize = body->eadatasize;
 570
 571                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 572                         GOTO(out_req, rc = -ENODATA);
 573
 574                 if (lmmsize > 4096)
 575                         GOTO(out_req, rc = -EFBIG);
 576
 577                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 578                 LASSERT(lmm != NULL);
 579                 LASSERT_REPSWABBED(request, 1);
 580
 581                 rc = copy_to_user(lump, lmm, lmmsize);
 582                 if (rc)
 583                         GOTO(out_req, rc = -EFAULT);
 584
 585                 EXIT;
 586         out_req:
 587                 ptlrpc_req_finished(request);
 588         out_name:
 589                 putname(filename);
 590                 return rc;
 591         }
 592         case OBD_IOC_PING: {
 593                 struct ptlrpc_request *req = NULL;
 594                 char *buf = NULL;
 595                 int rc, len=0;
 596                 struct client_obd *cli;
 597                 struct obd_device *obd;
 598
 599                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 600                 if (rc)
 601                         RETURN(rc);
 602                 data = (void *)buf;
 603
 604                 obd = class_name2obd(data->ioc_inlbuf1);
 605
 606                 if (!obd )
 607                         GOTO(out_ping, rc = -ENODEV);
 608
 609                 if (!obd->obd_attached) {
 610                         CERROR("Device %d not attached\n", obd->obd_minor);
 611                         GOTO(out_ping, rc = -ENODEV);
 612                 }
 613                 if (!obd->obd_set_up) {
 614                         CERROR("Device %d still not setup\n", obd->obd_minor);
 615                         GOTO(out_ping, rc = -ENODEV);
 616                 }
 617                 cli = &obd->u.cli;
 618                 req = ptlrpc_prep_req(cli->cl_import, OBD_PING, 0, NULL, NULL);
 619                 if (!req)
 620                         GOTO(out_ping, rc = -ENOMEM);
 621
 622                 req->rq_replen = lustre_msg_size(0, NULL);
 623                 req->rq_send_state = LUSTRE_IMP_FULL;
 624
 625                 rc = ptlrpc_queue_wait(req);
 626
 627                 ptlrpc_req_finished(req);
 628         out_ping:
 629                 obd_ioctl_freedata(buf, len);
 630                 return rc;
 631         }
 632         case OBD_IOC_LLOG_CATINFO: {
 633                 struct ptlrpc_request *req = NULL;
 634                 char *buf = NULL;
 635                 int rc, len = 0;
 636                 char *bufs[2], *str;
 637                 int lens[2], size;
 638
 639                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 640                 if (rc)
 641                         RETURN(rc);
 642                 data = (void *)buf;
 643
 644                 if (!data->ioc_inlbuf1) {
 645                         obd_ioctl_freedata(buf, len);
 646                         RETURN(-EINVAL);
 647                 }
 648
 649                 lens[0] = data->ioc_inllen1;
 650                 bufs[0] = data->ioc_inlbuf1;
 651                 if (data->ioc_inllen2) {
 652                         lens[1] = data->ioc_inllen2;
 653                         bufs[1] = data->ioc_inlbuf2;
 654                 } else {
 655                         lens[1] = 0;
 656                         bufs[1] = NULL;
 657                 }
 658                 size = data->ioc_plen1;
 659                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import, LLOG_CATINFO,
 660                                       2, lens, bufs);
 661                 if (!req)
 662                         GOTO(out_catinfo, rc = -ENOMEM);
 663                 req->rq_replen = lustre_msg_size(1, &size);
 664
 665                 rc = ptlrpc_queue_wait(req);
 666                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 667                 if (!rc)
 668                         rc = copy_to_user(data->ioc_pbuf1, str,
 669                                           data->ioc_plen1);
 670                 ptlrpc_req_finished(req);
 671         out_catinfo:
 672                 obd_ioctl_freedata(buf, len);
 673                 RETURN(rc);
 674         }
 675         default:
 676                 return obd_iocontrol(cmd, sbi->ll_osc_exp,0,NULL,(void *)arg);
 677         }
 678 }
 679
 680 int ll_dir_open(struct inode *inode, struct file *file)
 681 {
 682         ENTRY;
 683         RETURN(ll_file_open(inode, file));
 684 }
 685
 686 int ll_dir_release(struct inode *inode, struct file *file)
 687 {
 688         ENTRY;
 689         RETURN(ll_file_release(inode, file));
 690 }
 691
 692 struct file_operations ll_dir_operations = {
 693         .open     = ll_dir_open,
 694         .release  = ll_dir_release,
 695         .read     = generic_read_dir,
 696         .readdir  = ll_readdir,
 697         .ioctl    = ll_dir_ioctl
 698 };
 699