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 "llite_internal.h"
  54
  55 typedef struct ext2_dir_entry_2 ext2_dirent;
  56
  57 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  58 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  59
  60 /* returns the page unlocked, but with a reference */
  61 static int ll_dir_readpage(struct file *file, struct page *page)
  62 {
  63         struct inode *inode = page->mapping->host;
  64         struct ll_fid mdc_fid;
  65         __u64 offset;
  66         struct ptlrpc_request *request;
  67         struct mds_body *body;
  68         int rc = 0;
  69         ENTRY;
  70
  71         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
  72                inode->i_generation, inode);
  73
  74         mdc_pack_fid(&mdc_fid, inode->i_ino, inode->i_generation, S_IFDIR);
  75         mdc_fid.mds = ll_i2info(inode)->lli_mds;
  76         offset = page->index << PAGE_SHIFT;
  77         rc = md_readpage(ll_i2sbi(inode)->ll_mdc_exp, &mdc_fid,
  78                          offset, page, &request);
  79         if (!rc) {
  80                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
  81                 LASSERT (body != NULL);         /* checked by md_readpage() */
  82                 LASSERT_REPSWABBED (request, 0); /* swabbed by md_readpage() */
  83
  84 #warning "FIXME ASAP!"
  85                 //inode->i_size = body->size;
  86                 SetPageUptodate(page);
  87         }
  88         ptlrpc_req_finished(request);
  89
  90         unlock_page(page);
  91         EXIT;
  92         return rc;
  93 }
  94
  95 struct address_space_operations ll_dir_aops = {
  96         .readpage  = ll_dir_readpage,
  97 };
  98
  99 /*
 100  * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
 101  * more robust, but we have what we have
 102  */
 103 static inline unsigned ext2_chunk_size(struct inode *inode)
 104 {
 105         return inode->i_sb->s_blocksize;
 106 }
 107
 108 static inline void ext2_put_page(struct page *page)
 109 {
 110         kunmap(page);
 111         page_cache_release(page);
 112 }
 113
 114 static inline unsigned long dir_pages(struct inode *inode)
 115 {
 116         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 117 }
 118
 119
 120 static void ext2_check_page(struct page *page)
 121 {
 122         struct inode *dir = page->mapping->host;
 123         unsigned chunk_size = ext2_chunk_size(dir);
 124         char *kaddr = page_address(page);
 125         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 126         unsigned offs, rec_len;
 127         unsigned limit = PAGE_CACHE_SIZE;
 128         ext2_dirent *p;
 129         char *error;
 130
 131         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 132                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 133                 if (limit & (chunk_size - 1)) {
 134                         CERROR("limit %d dir size %lld index %ld\n",
 135                                limit, dir->i_size, page->index);
 136                         goto Ebadsize;
 137                 }
 138                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 139                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 140                         p->rec_len = cpu_to_le16(chunk_size);
 141                         p->name_len = 0;
 142                         p->inode = 0;
 143                 }
 144                 if (!limit)
 145                         goto out;
 146         }
 147         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 148                 p = (ext2_dirent *)(kaddr + offs);
 149                 rec_len = le16_to_cpu(p->rec_len);
 150
 151                 if (rec_len < EXT2_DIR_REC_LEN(1))
 152                         goto Eshort;
 153                 if (rec_len & 3)
 154                         goto Ealign;
 155                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 156                         goto Enamelen;
 157                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 158                         goto Espan;
 159                 //              if (le32_to_cpu(p->inode) > max_inumber)
 160                 //goto Einumber;
 161         }
 162         if (offs != limit)
 163                 goto Eend;
 164 out:
 165         SetPageChecked(page);
 166         return;
 167
 168         /* Too bad, we had an error */
 169
 170 Ebadsize:
 171         CERROR("ext2_check_page"
 172                 "size of directory #%lu is not a multiple of chunk size\n",
 173                 dir->i_ino
 174         );
 175         goto fail;
 176 Eshort:
 177         error = "rec_len is smaller than minimal";
 178         goto bad_entry;
 179 Ealign:
 180         error = "unaligned directory entry";
 181         goto bad_entry;
 182 Enamelen:
 183         error = "rec_len is too small for name_len";
 184         goto bad_entry;
 185 Espan:
 186         error = "directory entry across blocks";
 187         goto bad_entry;
 188         //Einumber:
 189         // error = "inode out of bounds";
 190 bad_entry:
 191         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 192                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 193                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 194                 (unsigned long) le32_to_cpu(p->inode),
 195                 rec_len, p->name_len);
 196         goto fail;
 197 Eend:
 198         p = (ext2_dirent *)(kaddr + offs);
 199         CERROR("ext2_check_page"
 200                 "entry in directory #%lu spans the page boundary"
 201                 "offset=%lu, inode=%lu",
 202                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 203                 (unsigned long) le32_to_cpu(p->inode));
 204 fail:
 205         SetPageChecked(page);
 206         SetPageError(page);
 207 }
 208
 209 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 210 {
 211         struct ldlm_res_id res_id =
 212                 { .name = { dir->i_ino, (__u64)dir->i_generation} };
 213         struct lustre_handle lockh;
 214         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_mdc_exp);
 215         struct address_space *mapping = dir->i_mapping;
 216         struct page *page;
 217         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
 218         int rc;
 219
 220         obddev = md_get_real_obd(ll_i2sbi(dir)->ll_mdc_exp, NULL, 0);
 221         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 222                              &res_id, LDLM_IBITS, &policy, LCK_PR, &lockh);
 223         if (!rc) {
 224                 struct lookup_intent it = { .it_op = IT_READDIR };
 225                 struct ptlrpc_request *request;
 226                 struct mdc_op_data data;
 227
 228                 ll_prepare_mdc_op_data(&data, dir, NULL, NULL, 0, 0);
 229
 230                 rc = md_enqueue(ll_i2sbi(dir)->ll_mdc_exp, LDLM_IBITS, &it,
 231                                 LCK_PR, &data, &lockh, NULL, 0,
 232                                 ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 233
 234                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 235                 if (request)
 236                         ptlrpc_req_finished(request);
 237                 if (rc < 0) {
 238                         CERROR("lock enqueue: rc: %d\n", rc);
 239                         return ERR_PTR(rc);
 240                 }
 241         }
 242         ldlm_lock_dump_handle(D_OTHER, &lockh);
 243
 244         page = read_cache_page(mapping, n,
 245                                (filler_t*)mapping->a_ops->readpage, NULL);
 246         if (!IS_ERR(page)) {
 247                 wait_on_page(page);
 248                 (void)kmap(page);
 249                 if (!PageUptodate(page))
 250                         goto fail;
 251                 if (!PageChecked(page))
 252                         ext2_check_page(page);
 253                 if (PageError(page))
 254                         goto fail;
 255         }
 256
 257 out_unlock:
 258         ldlm_lock_decref(&lockh, LCK_PR);
 259         return page;
 260
 261 fail:
 262         ext2_put_page(page);
 263         page = ERR_PTR(-EIO);
 264         goto out_unlock;
 265 }
 266
 267 /*
 268  * p is at least 6 bytes before the end of page
 269  */
 270 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 271 {
 272         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 273 }
 274
 275 static inline unsigned
 276 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 277 {
 278         ext2_dirent *de = (ext2_dirent*)(base + offset);
 279         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 280         while ((char*)p < (char*)de)
 281                 p = ext2_next_entry(p);
 282         return (char *)p - base;
 283 }
 284
 285 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 286         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 287         [EXT2_FT_REG_FILE]      DT_REG,
 288         [EXT2_FT_DIR]           DT_DIR,
 289         [EXT2_FT_CHRDEV]        DT_CHR,
 290         [EXT2_FT_BLKDEV]        DT_BLK,
 291         [EXT2_FT_FIFO]          DT_FIFO,
 292         [EXT2_FT_SOCK]          DT_SOCK,
 293         [EXT2_FT_SYMLINK]       DT_LNK,
 294 };
 295
 296
 297 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 298 {
 299         struct inode *inode = filp->f_dentry->d_inode;
 300         loff_t pos = filp->f_pos;
 301         // XXX struct super_block *sb = inode->i_sb;
 302         unsigned offset = pos & ~PAGE_CACHE_MASK;
 303         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 304         unsigned long npages = dir_pages(inode);
 305         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 306         unsigned char *types = NULL;
 307         int need_revalidate = (filp->f_version != inode->i_version);
 308         int rc = 0;
 309         ENTRY;
 310
 311         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 312                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 313
 314         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 315                 RETURN(0);
 316
 317         types = ext2_filetype_table;
 318
 319         for ( ; n < npages; n++, offset = 0) {
 320                 char *kaddr, *limit;
 321                 ext2_dirent *de;
 322                 struct page *page;
 323
 324                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 325                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 326                        n, npages, inode->i_size);
 327                 page = ll_get_dir_page(inode, n);
 328
 329                 /* size might have been updated by md_readpage() */
 330                 npages = dir_pages(inode);
 331
 332                 if (IS_ERR(page)) {
 333                         rc = PTR_ERR(page);
 334                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 335                                inode->i_ino, inode->i_generation, n, rc);
 336                         continue;
 337                 }
 338
 339                 kaddr = page_address(page);
 340                 if (need_revalidate) {
 341                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 342                         need_revalidate = 0;
 343                 }
 344                 de = (ext2_dirent *)(kaddr+offset);
 345                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 346                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 347                         if (de->inode) {
 348                                 int over;
 349                                 unsigned char d_type = DT_UNKNOWN;
 350
 351                                 rc = 0; /* no error if we return something */
 352                                 if (types && de->file_type < EXT2_FT_MAX)
 353                                         d_type = types[de->file_type];
 354
 355                                 offset = (char *)de - kaddr;
 356                                 over = filldir(dirent, de->name, de->name_len,
 357                                                (n<<PAGE_CACHE_SHIFT) | offset,
 358                                                le32_to_cpu(de->inode), d_type);
 359                                 if (over) {
 360                                         ext2_put_page(page);
 361                                         GOTO(done, rc);
 362                                 }
 363                         }
 364                 }
 365                 ext2_put_page(page);
 366         }
 367
 368 done:
 369         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 370         filp->f_version = inode->i_version;
 371         update_atime(inode);
 372         RETURN(rc);
 373 }
 374
 375 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 376 {
 377         char *name;
 378         struct ll_user_mkdir_stripe lums;
 379         struct ptlrpc_request *request = NULL;
 380         struct ll_sb_info *sbi = ll_i2sbi(inode);
 381         struct mdc_op_data op_data;
 382         u16 nstripes;
 383         mode_t mode;
 384         int err = 0;
 385         ENTRY;
 386
 387         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 388                 RETURN(-EFAULT);
 389
 390         if (lums.lums_namelen <= 0)
 391                 RETURN(-EINVAL);
 392         OBD_ALLOC(name, lums.lums_namelen);
 393         if (!name)
 394                 RETURN(-ENOMEM);
 395
 396         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 397                 GOTO(out, err=-EFAULT);
 398
 399         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 400                name, inode->i_ino, inode->i_generation, inode);
 401         nstripes = lums.lums_nstripes;
 402
 403         mode = lums.lums_mode;
 404         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 405         ll_prepare_mdc_op_data(&op_data, inode, NULL, name,lums.lums_namelen,0);
 406         err = md_create(sbi->ll_mdc_exp, &op_data, &nstripes, sizeof(nstripes),
 407                         mode, current->fsuid, current->fsgid, 0, &request);
 408         ptlrpc_req_finished(request);
 409
 410 out:
 411         OBD_FREE(name, lums.lums_namelen);
 412         RETURN(err);
 413 }
 414
 415 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 416                         unsigned int cmd, unsigned long arg)
 417 {
 418         struct ll_sb_info *sbi = ll_i2sbi(inode);
 419         struct obd_ioctl_data *data;
 420         ENTRY;
 421
 422         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 423                inode->i_ino, inode->i_generation, inode, cmd);
 424
 425         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 426                 return -ENOTTY;
 427
 428         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 429         switch(cmd) {
 430         case EXT3_IOC_GETFLAGS:
 431         case EXT3_IOC_SETFLAGS:
 432                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 433         case IOC_MDC_LOOKUP: {
 434                 struct ptlrpc_request *request = NULL;
 435                 struct ll_fid fid;
 436                 char *buf = NULL;
 437                 char *filename;
 438                 int namelen, rc, len = 0;
 439                 unsigned long valid;
 440
 441                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 442                 if (rc)
 443                         RETURN(rc);
 444                 data = (void *)buf;
 445
 446                 filename = data->ioc_inlbuf1;
 447                 namelen = data->ioc_inllen1;
 448
 449                 if (namelen < 1) {
 450                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 451                         GOTO(out, rc = -EINVAL);
 452                 }
 453
 454                 valid = OBD_MD_FLID;
 455                 ll_inode2fid(&fid, inode);
 456                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid,
 457                                      filename, namelen, valid, 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 IOC_MDC_FINISH_GNS:
 473                 RETURN(ll_finish_gns(sbi));
 474         case LL_IOC_LOV_SETSTRIPE: {
 475                 struct ptlrpc_request *request = NULL;
 476                 struct mdc_op_data op_data;
 477                 struct iattr attr = { 0 };
 478                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 479                 int rc = 0;
 480
 481                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
 482
 483                 LASSERT(sizeof(lum) == sizeof(*lump));
 484                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 485                         sizeof(lump->lmm_objects[0]));
 486                 rc = copy_from_user(&lum, lump, sizeof(lum));
 487                 if (rc)
 488                         return(-EFAULT);
 489
 490                 if (lum.lmm_magic != LOV_USER_MAGIC)
 491                         RETURN(-EINVAL);
 492
 493                 rc = md_setattr(sbi->ll_mdc_exp, &op_data,
 494                                 &attr, &lum, sizeof(lum), NULL, 0, &request);
 495                 if (rc) {
 496                         ptlrpc_req_finished(request);
 497                         if (rc != -EPERM && rc != -EACCES)
 498                                 CERROR("md_setattr fails: rc = %d\n", rc);
 499                         return rc;
 500                 }
 501                 ptlrpc_req_finished(request);
 502
 503                 return rc;
 504         }
 505         case LL_IOC_LOV_GETSTRIPE: {
 506                 struct ptlrpc_request *request = NULL;
 507                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 508                 struct lov_mds_md *lmm;
 509                 struct ll_fid fid;
 510                 struct mds_body *body;
 511                 unsigned long valid = 0;
 512                 int rc, lmmsize;
 513
 514                 valid |= OBD_MD_FLDIREA;
 515
 516                 ll_inode2fid(&fid, inode);
 517                 rc = md_getattr(sbi->ll_mdc_exp, &fid, valid,
 518                                 obd_size_diskmd(sbi->ll_osc_exp, NULL),
 519                                 &request);
 520                 if (rc < 0) {
 521                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 522                         RETURN(rc);
 523                 }
 524
 525                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 526                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 527                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 528
 529                 lmmsize = body->eadatasize;
 530                 if (lmmsize == 0)
 531                         GOTO(out_get, rc = -ENODATA);
 532
 533                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 534                 LASSERT(lmm != NULL);
 535                 LASSERT_REPSWABBED(request, 1);
 536                 rc = copy_to_user(lump, lmm, lmmsize);
 537                 if (rc)
 538                         GOTO(out_get, rc = -EFAULT);
 539
 540                 EXIT;
 541         out_get:
 542                 ptlrpc_req_finished(request);
 543                 RETURN(rc);
 544         }
 545         case IOC_MDC_GETSTRIPE: {
 546                 struct ptlrpc_request *request = NULL;
 547                 struct ll_fid fid;
 548                 struct mds_body *body;
 549                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 550                 struct lov_mds_md *lmm;
 551                 char *filename;
 552                 int rc, lmmsize;
 553
 554                 filename = getname((const char *)arg);
 555                 if (IS_ERR(filename))
 556                         RETURN(PTR_ERR(filename));
 557
 558                 ll_inode2fid(&fid, inode);
 559                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid, filename,
 560                                      strlen(filename) + 1, OBD_MD_FLEASIZE,
 561                                      obd_size_diskmd(sbi->ll_osc_exp, NULL),
 562                                      &request);
 563                 if (rc < 0) {
 564                         CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
 565                                filename, rc);
 566                         GOTO(out_name, rc);
 567                 }
 568
 569                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 570                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 571                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 572
 573                 lmmsize = body->eadatasize;
 574
 575                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 576                         GOTO(out_req, rc = -ENODATA);
 577
 578                 if (lmmsize > 4096)
 579                         GOTO(out_req, rc = -EFBIG);
 580
 581                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 582                 LASSERT(lmm != NULL);
 583                 LASSERT_REPSWABBED(request, 1);
 584
 585                 rc = copy_to_user(lump, lmm, lmmsize);
 586                 if (rc)
 587                         GOTO(out_req, rc = -EFAULT);
 588
 589                 EXIT;
 590         out_req:
 591                 ptlrpc_req_finished(request);
 592         out_name:
 593                 putname(filename);
 594                 return rc;
 595         }
 596         case OBD_IOC_PING: {
 597                 struct ptlrpc_request *req = NULL;
 598                 char *buf = NULL;
 599                 int rc, len=0;
 600                 struct client_obd *cli;
 601                 struct obd_device *obd;
 602
 603                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 604                 if (rc)
 605                         RETURN(rc);
 606                 data = (void *)buf;
 607
 608                 obd = class_name2obd(data->ioc_inlbuf1);
 609
 610                 if (!obd )
 611                         GOTO(out_ping, rc = -ENODEV);
 612
 613                 if (!obd->obd_attached) {
 614                         CERROR("Device %d not attached\n", obd->obd_minor);
 615                         GOTO(out_ping, rc = -ENODEV);
 616                 }
 617                 if (!obd->obd_set_up) {
 618                         CERROR("Device %d still not setup\n", obd->obd_minor);
 619                         GOTO(out_ping, rc = -ENODEV);
 620                 }
 621                 cli = &obd->u.cli;
 622                 req = ptlrpc_prep_req(cli->cl_import, OBD_PING, 0, NULL, NULL);
 623                 if (!req)
 624                         GOTO(out_ping, rc = -ENOMEM);
 625
 626                 req->rq_replen = lustre_msg_size(0, NULL);
 627                 req->rq_send_state = LUSTRE_IMP_FULL;
 628
 629                 rc = ptlrpc_queue_wait(req);
 630
 631                 ptlrpc_req_finished(req);
 632         out_ping:
 633                 obd_ioctl_freedata(buf, len);
 634                 return rc;
 635         }
 636         case OBD_IOC_LLOG_CATINFO: {
 637                 struct ptlrpc_request *req = NULL;
 638                 char *buf = NULL;
 639                 int rc, len = 0;
 640                 char *bufs[2], *str;
 641                 int lens[2], size;
 642
 643                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 644                 if (rc)
 645                         RETURN(rc);
 646                 data = (void *)buf;
 647
 648                 if (!data->ioc_inlbuf1) {
 649                         obd_ioctl_freedata(buf, len);
 650                         RETURN(-EINVAL);
 651                 }
 652
 653                 lens[0] = data->ioc_inllen1;
 654                 bufs[0] = data->ioc_inlbuf1;
 655                 if (data->ioc_inllen2) {
 656                         lens[1] = data->ioc_inllen2;
 657                         bufs[1] = data->ioc_inlbuf2;
 658                 } else {
 659                         lens[1] = 0;
 660                         bufs[1] = NULL;
 661                 }
 662                 size = data->ioc_plen1;
 663                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import, LLOG_CATINFO,
 664                                       2, lens, bufs);
 665                 if (!req)
 666                         GOTO(out_catinfo, rc = -ENOMEM);
 667                 req->rq_replen = lustre_msg_size(1, &size);
 668
 669                 rc = ptlrpc_queue_wait(req);
 670                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 671                 if (!rc)
 672                         rc = copy_to_user(data->ioc_pbuf1, str,
 673                                           data->ioc_plen1);
 674                 ptlrpc_req_finished(req);
 675         out_catinfo:
 676                 obd_ioctl_freedata(buf, len);
 677                 RETURN(rc);
 678         }
 679         default:
 680                 return obd_iocontrol(cmd, sbi->ll_osc_exp,0,NULL,(void *)arg);
 681         }
 682 }
 683
 684 int ll_dir_open(struct inode *inode, struct file *file)
 685 {
 686         ENTRY;
 687         RETURN(ll_file_open(inode, file));
 688 }
 689
 690 int ll_dir_release(struct inode *inode, struct file *file)
 691 {
 692         ENTRY;
 693         RETURN(ll_file_release(inode, file));
 694 }
 695
 696 struct file_operations ll_dir_operations = {
 697         .open     = ll_dir_open,
 698         .release  = ll_dir_release,
 699         .read     = generic_read_dir,
 700         .readdir  = ll_readdir,
 701         .ioctl    = ll_dir_ioctl
 702 };
 703