lustre/llite/dir.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/fs/minix/dir.c
  12  *  linux/fs/ext2/dir.c
  13  *
  14  *  Copyright (C) 1991, 1992  Linus Torvalds
  15  *
  16  *  ext2 directory handling functions
  17  *
  18  *  Big-endian to little-endian byte-swapping/bitmaps by
  19  *        David S. Miller (davem@caip.rutgers.edu), 1995
  20  *
  21  *  All code that works with directory layout had been switched to pagecache
  22  *  and moved here. AV
  23  *
  24  *  Adapted for Lustre Light
  25  *  Copyright (C) 2002-2003, Cluster File Systems, Inc.
  26  *
  27  */
  28
  29 #include <linux/fs.h>
  30 #include <linux/ext2_fs.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/mm.h>
  33 #include <linux/version.h>
  34 #include <linux/smp_lock.h>
  35 #include <asm/uaccess.h>
  36 #include <linux/file.h>
  37 #include <linux/kmod.h>
  38 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  39 # include <linux/locks.h>   // for wait_on_buffer
  40 #else
  41 # include <linux/buffer_head.h>   // for wait_on_buffer
  42 #endif
  43
  44 #define DEBUG_SUBSYSTEM S_LLITE
  45
  46 #include <linux/obd_support.h>
  47 #include <linux/obd_class.h>
  48 #include <linux/lustre_lib.h>
  49 #include <linux/lustre_idl.h>
  50 #include <linux/lustre_mds.h>
  51 #include <linux/lustre_lite.h>
  52 #include <linux/lustre_dlm.h>
  53 #include <linux/lustre_smfs.h>
  54 #include <linux/lustre_snap.h>
  55 #include "llite_internal.h"
  56
  57 typedef struct ext2_dir_entry_2 ext2_dirent;
  58
  59 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  60 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  61
  62 /* returns the page unlocked, but with a reference */
  63 static int ll_dir_readpage(struct file *file, struct page *page)
  64 {
  65         struct inode *inode = page->mapping->host;
  66         struct ll_fid mdc_fid;
  67         __u64 offset;
  68         struct ptlrpc_request *request;
  69         struct mds_body *body;
  70         int rc = 0;
  71         ENTRY;
  72
  73         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
  74                inode->i_generation, inode);
  75
  76         mdc_pack_fid(&mdc_fid, inode->i_ino, inode->i_generation, S_IFDIR);
  77         mdc_fid.mds = ll_i2info(inode)->lli_mds;
  78         offset = page->index << PAGE_SHIFT;
  79         rc = md_readpage(ll_i2sbi(inode)->ll_mdc_exp, &mdc_fid,
  80                          offset, page, &request);
  81         if (!rc) {
  82                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
  83                 LASSERT (body != NULL);         /* checked by md_readpage() */
  84                 LASSERT_REPSWABBED (request, 0); /* swabbed by md_readpage() */
  85
  86 #warning "FIXME ASAP!"
  87                 //inode->i_size = body->size;
  88                 SetPageUptodate(page);
  89         }
  90         ptlrpc_req_finished(request);
  91
  92         unlock_page(page);
  93         EXIT;
  94         return rc;
  95 }
  96
  97 struct address_space_operations ll_dir_aops = {
  98         .readpage  = ll_dir_readpage,
  99 };
 100
 101 /*
 102  * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
 103  * more robust, but we have what we have
 104  */
 105 static inline unsigned ext2_chunk_size(struct inode *inode)
 106 {
 107         return inode->i_sb->s_blocksize;
 108 }
 109
 110 static inline void ext2_put_page(struct page *page)
 111 {
 112         kunmap(page);
 113         page_cache_release(page);
 114 }
 115
 116 static inline unsigned long dir_pages(struct inode *inode)
 117 {
 118         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 119 }
 120
 121
 122 static void ext2_check_page(struct page *page)
 123 {
 124         struct inode *dir = page->mapping->host;
 125         unsigned chunk_size = ext2_chunk_size(dir);
 126         char *kaddr = page_address(page);
 127         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 128         unsigned offs, rec_len;
 129         unsigned limit = PAGE_CACHE_SIZE;
 130         ext2_dirent *p;
 131         char *error;
 132
 133         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 134                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 135                 if (limit & (chunk_size - 1)) {
 136                         CERROR("limit %d dir size %lld index %ld\n",
 137                                limit, dir->i_size, page->index);
 138                         goto Ebadsize;
 139                 }
 140                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 141                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 142                         p->rec_len = cpu_to_le16(chunk_size);
 143                         p->name_len = 0;
 144                         p->inode = 0;
 145                 }
 146                 if (!limit)
 147                         goto out;
 148         }
 149         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 150                 p = (ext2_dirent *)(kaddr + offs);
 151                 rec_len = le16_to_cpu(p->rec_len);
 152
 153                 if (rec_len < EXT2_DIR_REC_LEN(1))
 154                         goto Eshort;
 155                 if (rec_len & 3)
 156                         goto Ealign;
 157                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 158                         goto Enamelen;
 159                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 160                         goto Espan;
 161                 //              if (le32_to_cpu(p->inode) > max_inumber)
 162                 //goto Einumber;
 163         }
 164         if (offs != limit)
 165                 goto Eend;
 166 out:
 167         SetPageChecked(page);
 168         return;
 169
 170         /* Too bad, we had an error */
 171
 172 Ebadsize:
 173         CERROR("ext2_check_page"
 174                 "size of directory #%lu is not a multiple of chunk size\n",
 175                 dir->i_ino
 176         );
 177         goto fail;
 178 Eshort:
 179         error = "rec_len is smaller than minimal";
 180         goto bad_entry;
 181 Ealign:
 182         error = "unaligned directory entry";
 183         goto bad_entry;
 184 Enamelen:
 185         error = "rec_len is too small for name_len";
 186         goto bad_entry;
 187 Espan:
 188         error = "directory entry across blocks";
 189         goto bad_entry;
 190         //Einumber:
 191         // error = "inode out of bounds";
 192 bad_entry:
 193         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 194                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 195                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 196                 (unsigned long) le32_to_cpu(p->inode),
 197                 rec_len, p->name_len);
 198         goto fail;
 199 Eend:
 200         p = (ext2_dirent *)(kaddr + offs);
 201         CERROR("ext2_check_page"
 202                 "entry in directory #%lu spans the page boundary"
 203                 "offset=%lu, inode=%lu",
 204                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 205                 (unsigned long) le32_to_cpu(p->inode));
 206 fail:
 207         SetPageChecked(page);
 208         SetPageError(page);
 209 }
 210
 211 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 212 {
 213         struct ldlm_res_id res_id =
 214                 { .name = { dir->i_ino, (__u64)dir->i_generation} };
 215         struct lustre_handle lockh;
 216         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_mdc_exp);
 217         struct address_space *mapping = dir->i_mapping;
 218         struct page *page;
 219         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
 220         int rc;
 221
 222         obddev = md_get_real_obd(ll_i2sbi(dir)->ll_mdc_exp, NULL, 0);
 223         rc = ldlm_lock_match(obddev->obd_namespace, LDLM_FL_BLOCK_GRANTED,
 224                              &res_id, LDLM_IBITS, &policy, LCK_PR, &lockh);
 225         if (!rc) {
 226                 struct lookup_intent it = { .it_op = IT_READDIR };
 227                 struct ptlrpc_request *request;
 228                 struct mdc_op_data data;
 229
 230                 ll_prepare_mdc_op_data(&data, dir, NULL, NULL, 0, 0);
 231
 232                 rc = md_enqueue(ll_i2sbi(dir)->ll_mdc_exp, LDLM_IBITS, &it,
 233                                 LCK_PR, &data, &lockh, NULL, 0,
 234                                 ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 235
 236                 request = (struct ptlrpc_request *)it.d.lustre.it_data;
 237                 if (request)
 238                         ptlrpc_req_finished(request);
 239                 if (rc < 0) {
 240                         CERROR("lock enqueue: rc: %d\n", rc);
 241                         return ERR_PTR(rc);
 242                 }
 243         }
 244         ldlm_lock_dump_handle(D_OTHER, &lockh);
 245
 246         page = read_cache_page(mapping, n,
 247                                (filler_t*)mapping->a_ops->readpage, NULL);
 248         if (!IS_ERR(page)) {
 249                 wait_on_page(page);
 250                 (void)kmap(page);
 251                 if (!PageUptodate(page))
 252                         goto fail;
 253                 if (!PageChecked(page))
 254                         ext2_check_page(page);
 255                 if (PageError(page))
 256                         goto fail;
 257         }
 258
 259 out_unlock:
 260         ldlm_lock_decref(&lockh, LCK_PR);
 261         return page;
 262
 263 fail:
 264         ext2_put_page(page);
 265         page = ERR_PTR(-EIO);
 266         goto out_unlock;
 267 }
 268
 269 /*
 270  * p is at least 6 bytes before the end of page
 271  */
 272 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 273 {
 274         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 275 }
 276
 277 static inline unsigned
 278 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 279 {
 280         ext2_dirent *de = (ext2_dirent*)(base + offset);
 281         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 282         while ((char*)p < (char*)de)
 283                 p = ext2_next_entry(p);
 284         return (char *)p - base;
 285 }
 286
 287 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 288         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 289         [EXT2_FT_REG_FILE]      DT_REG,
 290         [EXT2_FT_DIR]           DT_DIR,
 291         [EXT2_FT_CHRDEV]        DT_CHR,
 292         [EXT2_FT_BLKDEV]        DT_BLK,
 293         [EXT2_FT_FIFO]          DT_FIFO,
 294         [EXT2_FT_SOCK]          DT_SOCK,
 295         [EXT2_FT_SYMLINK]       DT_LNK,
 296 };
 297
 298
 299 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 300 {
 301         struct inode *inode = filp->f_dentry->d_inode;
 302         loff_t pos = filp->f_pos;
 303         // XXX struct super_block *sb = inode->i_sb;
 304         unsigned offset = pos & ~PAGE_CACHE_MASK;
 305         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 306         unsigned long npages = dir_pages(inode);
 307         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 308         unsigned char *types = NULL;
 309         int need_revalidate = (filp->f_version != inode->i_version);
 310         int rc = 0;
 311         ENTRY;
 312
 313         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 314                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 315
 316         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 317                 RETURN(0);
 318
 319         types = ext2_filetype_table;
 320
 321         for ( ; n < npages; n++, offset = 0) {
 322                 char *kaddr, *limit;
 323                 ext2_dirent *de;
 324                 struct page *page;
 325
 326                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 327                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 328                        n, npages, inode->i_size);
 329                 page = ll_get_dir_page(inode, n);
 330
 331                 /* size might have been updated by md_readpage() */
 332                 npages = dir_pages(inode);
 333
 334                 if (IS_ERR(page)) {
 335                         rc = PTR_ERR(page);
 336                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 337                                inode->i_ino, inode->i_generation, n, rc);
 338                         continue;
 339                 }
 340
 341                 kaddr = page_address(page);
 342                 if (need_revalidate) {
 343                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 344                         need_revalidate = 0;
 345                 }
 346                 de = (ext2_dirent *)(kaddr+offset);
 347                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 348                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 349                         if (de->inode) {
 350                                 int over;
 351                                 unsigned char d_type = DT_UNKNOWN;
 352
 353
 354                                 rc = 0; /* no error if we return something */
 355                                 if (types && de->file_type < EXT2_FT_MAX)
 356                                         d_type = types[de->file_type];
 357
 358                                 offset = (char *)de - kaddr;
 359 #ifdef CONFIG_SNAPFS
 360                                 /*FIXME-WANGDI will get dot info from MDS*/
 361                                 if ((n << PAGE_CACHE_SHIFT | offset)  == 0) {
 362                                         int off =n << PAGE_CACHE_SHIFT | offset;
 363                                         over = filldir(dirent, DOT_SNAP_NAME,
 364                                                        strlen(DOT_SNAP_NAME),
 365                                                        off, -1, 0);
 366                                         if (over) {
 367                                                 ext2_put_page(page);
 368                                                 GOTO(done, rc);
 369                                         }
 370                                 }
 371                                 offset+=EXT2_DIR_REC_LEN(strlen(DOT_SNAP_NAME));
 372 #endif
 373                                 over = filldir(dirent, de->name, de->name_len,
 374                                                (n<<PAGE_CACHE_SHIFT) | offset,
 375                                                le32_to_cpu(de->inode), d_type);
 376                                 if (over) {
 377                                         ext2_put_page(page);
 378                                         GOTO(done, rc);
 379                                 }
 380                         }
 381                 }
 382                 ext2_put_page(page);
 383         }
 384
 385 done:
 386         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 387         filp->f_version = inode->i_version;
 388         update_atime(inode);
 389         RETURN(rc);
 390 }
 391
 392 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 393 {
 394         char *name;
 395         struct ll_user_mkdir_stripe lums;
 396         struct ptlrpc_request *request = NULL;
 397         struct ll_sb_info *sbi = ll_i2sbi(inode);
 398         struct mdc_op_data op_data;
 399         u16 nstripes;
 400         mode_t mode;
 401         int err = 0;
 402         ENTRY;
 403
 404         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 405                 RETURN(-EFAULT);
 406
 407         if (lums.lums_namelen <= 0)
 408                 RETURN(-EINVAL);
 409         OBD_ALLOC(name, lums.lums_namelen);
 410         if (!name)
 411                 RETURN(-ENOMEM);
 412
 413         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 414                 GOTO(out, err=-EFAULT);
 415
 416         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 417                name, inode->i_ino, inode->i_generation, inode);
 418         nstripes = lums.lums_nstripes;
 419
 420         mode = lums.lums_mode;
 421         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 422         ll_prepare_mdc_op_data(&op_data, inode, NULL, name,lums.lums_namelen,0);
 423         err = md_create(sbi->ll_mdc_exp, &op_data, &nstripes, sizeof(nstripes),
 424                         mode, current->fsuid, current->fsgid, 0, &request);
 425         ptlrpc_req_finished(request);
 426
 427 out:
 428         OBD_FREE(name, lums.lums_namelen);
 429         RETURN(err);
 430 }
 431
 432 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 433                         unsigned int cmd, unsigned long arg)
 434 {
 435         struct ll_sb_info *sbi = ll_i2sbi(inode);
 436         struct obd_ioctl_data *data;
 437         ENTRY;
 438
 439         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 440                inode->i_ino, inode->i_generation, inode, cmd);
 441
 442         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 443                 return -ENOTTY;
 444
 445         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 446         switch(cmd) {
 447         case EXT3_IOC_GETFLAGS:
 448         case EXT3_IOC_SETFLAGS:
 449                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 450         case IOC_MDC_LOOKUP: {
 451                 struct ptlrpc_request *request = NULL;
 452                 struct ll_fid fid;
 453                 char *buf = NULL;
 454                 char *filename;
 455                 int namelen, rc, len = 0;
 456                 unsigned long valid;
 457
 458                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 459                 if (rc)
 460                         RETURN(rc);
 461                 data = (void *)buf;
 462
 463                 filename = data->ioc_inlbuf1;
 464                 namelen = data->ioc_inllen1;
 465
 466                 if (namelen < 1) {
 467                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 468                         GOTO(out, rc = -EINVAL);
 469                 }
 470
 471                 valid = OBD_MD_FLID;
 472                 ll_inode2fid(&fid, inode);
 473                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid,
 474                                      filename, namelen, valid, 0, &request);
 475                 if (rc < 0) {
 476                         CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
 477                         GOTO(out, rc);
 478                 }
 479
 480                 ptlrpc_req_finished(request);
 481
 482                 EXIT;
 483         out:
 484                 obd_ioctl_freedata(buf, len);
 485                 return rc;
 486         }
 487         case LL_IOC_MDC_MKDIRSTRIPE:
 488                 RETURN(ll_mkdir_stripe(inode, arg));
 489         case IOC_MDC_FINISH_GNS:
 490                 RETURN(ll_finish_gns(sbi));
 491         case LL_IOC_LOV_SETSTRIPE: {
 492                 struct ptlrpc_request *request = NULL;
 493                 struct mdc_op_data op_data;
 494                 struct iattr attr = { 0 };
 495                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 496                 int rc = 0;
 497
 498                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
 499
 500                 LASSERT(sizeof(lum) == sizeof(*lump));
 501                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 502                         sizeof(lump->lmm_objects[0]));
 503                 rc = copy_from_user(&lum, lump, sizeof(lum));
 504                 if (rc)
 505                         return(-EFAULT);
 506
 507                 if (lum.lmm_magic != LOV_USER_MAGIC)
 508                         RETURN(-EINVAL);
 509
 510                 rc = md_setattr(sbi->ll_mdc_exp, &op_data,
 511                                 &attr, &lum, sizeof(lum), NULL, 0, &request);
 512                 if (rc) {
 513                         ptlrpc_req_finished(request);
 514                         if (rc != -EPERM && rc != -EACCES)
 515                                 CERROR("md_setattr fails: rc = %d\n", rc);
 516                         return rc;
 517                 }
 518                 ptlrpc_req_finished(request);
 519
 520                 return rc;
 521         }
 522         case LL_IOC_LOV_GETSTRIPE: {
 523                 struct ptlrpc_request *request = NULL;
 524                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 525                 struct lov_mds_md *lmm;
 526                 struct ll_fid fid;
 527                 struct mds_body *body;
 528                 unsigned long valid = 0;
 529                 int rc, lmmsize;
 530
 531                 valid |= OBD_MD_FLDIREA;
 532
 533                 ll_inode2fid(&fid, inode);
 534                 rc = md_getattr(sbi->ll_mdc_exp, &fid, valid,
 535                                 obd_size_diskmd(sbi->ll_osc_exp, NULL),
 536                                 &request);
 537                 if (rc < 0) {
 538                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 539                         RETURN(rc);
 540                 }
 541
 542                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 543                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 544                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 545
 546                 lmmsize = body->eadatasize;
 547                 if (lmmsize == 0)
 548                         GOTO(out_get, rc = -ENODATA);
 549
 550                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 551                 LASSERT(lmm != NULL);
 552                 LASSERT_REPSWABBED(request, 1);
 553                 rc = copy_to_user(lump, lmm, lmmsize);
 554                 if (rc)
 555                         GOTO(out_get, rc = -EFAULT);
 556
 557                 EXIT;
 558         out_get:
 559                 ptlrpc_req_finished(request);
 560                 RETURN(rc);
 561         }
 562         case IOC_MDC_GETSTRIPE: {
 563                 struct ptlrpc_request *request = NULL;
 564                 struct ll_fid fid;
 565                 struct mds_body *body;
 566                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 567                 struct lov_mds_md *lmm;
 568                 char *filename;
 569                 int rc, lmmsize;
 570
 571                 filename = getname((const char *)arg);
 572                 if (IS_ERR(filename))
 573                         RETURN(PTR_ERR(filename));
 574
 575                 ll_inode2fid(&fid, inode);
 576                 rc = md_getattr_name(sbi->ll_mdc_exp, &fid, filename,
 577                                      strlen(filename) + 1, OBD_MD_FLEASIZE,
 578                                      obd_size_diskmd(sbi->ll_osc_exp, NULL),
 579                                      &request);
 580                 if (rc < 0) {
 581                         CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n",
 582                                filename, rc);
 583                         GOTO(out_name, rc);
 584                 }
 585
 586                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 587                 LASSERT(body != NULL);         /* checked by md_getattr_name */
 588                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_name */
 589
 590                 lmmsize = body->eadatasize;
 591
 592                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 593                         GOTO(out_req, rc = -ENODATA);
 594
 595                 if (lmmsize > 4096)
 596                         GOTO(out_req, rc = -EFBIG);
 597
 598                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 599                 LASSERT(lmm != NULL);
 600                 LASSERT_REPSWABBED(request, 1);
 601
 602                 rc = copy_to_user(lump, lmm, lmmsize);
 603                 if (rc)
 604                         GOTO(out_req, rc = -EFAULT);
 605
 606                 EXIT;
 607         out_req:
 608                 ptlrpc_req_finished(request);
 609         out_name:
 610                 putname(filename);
 611                 return rc;
 612         }
 613         case OBD_IOC_PING: {
 614                 struct ptlrpc_request *req = NULL;
 615                 char *buf = NULL;
 616                 int rc, len=0;
 617                 struct client_obd *cli;
 618                 struct obd_device *obd;
 619
 620                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 621                 if (rc)
 622                         RETURN(rc);
 623                 data = (void *)buf;
 624
 625                 obd = class_name2obd(data->ioc_inlbuf1);
 626
 627                 if (!obd )
 628                         GOTO(out_ping, rc = -ENODEV);
 629
 630                 if (!obd->obd_attached) {
 631                         CERROR("Device %d not attached\n", obd->obd_minor);
 632                         GOTO(out_ping, rc = -ENODEV);
 633                 }
 634                 if (!obd->obd_set_up) {
 635                         CERROR("Device %d still not setup\n", obd->obd_minor);
 636                         GOTO(out_ping, rc = -ENODEV);
 637                 }
 638                 cli = &obd->u.cli;
 639                 req = ptlrpc_prep_req(cli->cl_import, OBD_PING, 0, NULL, NULL);
 640                 if (!req)
 641                         GOTO(out_ping, rc = -ENOMEM);
 642
 643                 req->rq_replen = lustre_msg_size(0, NULL);
 644                 req->rq_send_state = LUSTRE_IMP_FULL;
 645
 646                 rc = ptlrpc_queue_wait(req);
 647
 648                 ptlrpc_req_finished(req);
 649         out_ping:
 650                 obd_ioctl_freedata(buf, len);
 651                 return rc;
 652         }
 653         case OBD_IOC_LLOG_CATINFO: {
 654                 struct ptlrpc_request *req = NULL;
 655                 char *buf = NULL;
 656                 int rc, len = 0;
 657                 char *bufs[2], *str;
 658                 int lens[2], size;
 659
 660                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 661                 if (rc)
 662                         RETURN(rc);
 663                 data = (void *)buf;
 664
 665                 if (!data->ioc_inlbuf1) {
 666                         obd_ioctl_freedata(buf, len);
 667                         RETURN(-EINVAL);
 668                 }
 669
 670                 lens[0] = data->ioc_inllen1;
 671                 bufs[0] = data->ioc_inlbuf1;
 672                 if (data->ioc_inllen2) {
 673                         lens[1] = data->ioc_inllen2;
 674                         bufs[1] = data->ioc_inlbuf2;
 675                 } else {
 676                         lens[1] = 0;
 677                         bufs[1] = NULL;
 678                 }
 679                 size = data->ioc_plen1;
 680                 req = ptlrpc_prep_req(sbi2mdc(sbi)->cl_import, LLOG_CATINFO,
 681                                       2, lens, bufs);
 682                 if (!req)
 683                         GOTO(out_catinfo, rc = -ENOMEM);
 684                 req->rq_replen = lustre_msg_size(1, &size);
 685
 686                 rc = ptlrpc_queue_wait(req);
 687                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 688                 if (!rc)
 689                         rc = copy_to_user(data->ioc_pbuf1, str,
 690                                           data->ioc_plen1);
 691                 ptlrpc_req_finished(req);
 692         out_catinfo:
 693                 obd_ioctl_freedata(buf, len);
 694                 RETURN(rc);
 695         }
 696         default:
 697                 return obd_iocontrol(cmd, sbi->ll_osc_exp,0,NULL,(void *)arg);
 698         }
 699 }
 700
 701 int ll_dir_open(struct inode *inode, struct file *file)
 702 {
 703         ENTRY;
 704         RETURN(ll_file_open(inode, file));
 705 }
 706
 707 int ll_dir_release(struct inode *inode, struct file *file)
 708 {
 709         ENTRY;
 710         RETURN(ll_file_release(inode, file));
 711 }
 712
 713 struct file_operations ll_dir_operations = {
 714         .open     = ll_dir_open,
 715         .release  = ll_dir_release,
 716         .read     = generic_read_dir,
 717         .readdir  = ll_readdir,
 718         .ioctl    = ll_dir_ioctl
 719 };
 720