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_sec.h>
  54 #include "llite_internal.h"
  55
  56 typedef struct ext2_dir_entry_2 ext2_dirent;
  57
  58 #define PageChecked(page)        test_bit(PG_checked, &(page)->flags)
  59 #define SetPageChecked(page)     set_bit(PG_checked, &(page)->flags)
  60
  61 /* returns the page unlocked, but with a reference */
  62 static int ll_dir_readpage(struct file *file, struct page *page)
  63 {
  64         struct inode *inode = page->mapping->host;
  65         struct ptlrpc_request *request;
  66         struct mds_body *body;
  67         struct lustre_id id;
  68         __u64 offset;
  69         int rc = 0;
  70         ENTRY;
  71
  72         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
  73                inode->i_generation, inode);
  74
  75         mdc_pack_id(&id, inode->i_ino, inode->i_generation,
  76                     S_IFDIR, id_group(&ll_i2info(inode)->lli_id),
  77                     id_fid(&ll_i2info(inode)->lli_id));
  78
  79         offset = page->index << PAGE_SHIFT;
  80         rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, &id, offset,
  81                          page, &request);
  82         if (!rc) {
  83                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
  84                 LASSERT (body != NULL);          /* checked by md_readpage() */
  85                 LASSERT_REPSWABBED (request, 0); /* swabbed by md_readpage() */
  86
  87 #warning "FIXME ASAP!"
  88                 //inode->i_size = body->size;
  89                 SetPageUptodate(page);
  90         }
  91         ptlrpc_req_finished(request);
  92
  93         unlock_page(page);
  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 static void ext2_check_page(struct page *page)
 122 {
 123         struct inode *dir = page->mapping->host;
 124         unsigned chunk_size = ext2_chunk_size(dir);
 125         char *kaddr = page_address(page);
 126         //      u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
 127         unsigned offs, rec_len;
 128         unsigned limit = PAGE_CACHE_SIZE;
 129         ext2_dirent *p;
 130         char *error;
 131
 132         if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
 133                 limit = dir->i_size & ~PAGE_CACHE_MASK;
 134                 if (limit & (chunk_size - 1)) {
 135                         CERROR("limit %d dir size %lld index %ld\n",
 136                                limit, dir->i_size, page->index);
 137                         goto Ebadsize;
 138                 }
 139                 for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
 140                         ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
 141                         p->rec_len = cpu_to_le16(chunk_size);
 142                         p->name_len = 0;
 143                         p->inode = 0;
 144                 }
 145                 if (!limit)
 146                         goto out;
 147         }
 148         for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
 149                 p = (ext2_dirent *)(kaddr + offs);
 150                 rec_len = le16_to_cpu(p->rec_len);
 151
 152                 if (rec_len < EXT2_DIR_REC_LEN(1))
 153                         goto Eshort;
 154                 if (rec_len & 3)
 155                         goto Ealign;
 156                 if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
 157                         goto Enamelen;
 158                 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
 159                         goto Espan;
 160                 //              if (le32_to_cpu(p->inode) > max_inumber)
 161                 //goto Einumber;
 162         }
 163         if (offs != limit)
 164                 goto Eend;
 165 out:
 166         SetPageChecked(page);
 167         return;
 168
 169         /* Too bad, we had an error */
 170
 171 Ebadsize:
 172         CERROR("ext2_check_page"
 173                 "size of directory #%lu is not a multiple of chunk size\n",
 174                 dir->i_ino
 175         );
 176         goto fail;
 177 Eshort:
 178         error = "rec_len is smaller than minimal";
 179         goto bad_entry;
 180 Ealign:
 181         error = "unaligned directory entry";
 182         goto bad_entry;
 183 Enamelen:
 184         error = "rec_len is too small for name_len";
 185         goto bad_entry;
 186 Espan:
 187         error = "directory entry across blocks";
 188         goto bad_entry;
 189         //Einumber:
 190         // error = "inode out of bounds";
 191 bad_entry:
 192         CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
 193                 "offset=%lu+%u, inode=%lu, rec_len=%d, name_len=%d",
 194                 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT), offs,
 195                 (unsigned long) le32_to_cpu(p->inode),
 196                 rec_len, p->name_len);
 197         goto fail;
 198 Eend:
 199         p = (ext2_dirent *)(kaddr + offs);
 200         CERROR("ext2_check_page"
 201                 "entry in directory #%lu spans the page boundary"
 202                 "offset=%lu, inode=%lu",
 203                 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
 204                 (unsigned long) le32_to_cpu(p->inode));
 205 fail:
 206         SetPageChecked(page);
 207         SetPageError(page);
 208 }
 209
 210 static struct page *ll_get_dir_page(struct inode *dir, unsigned long n)
 211 {
 212         struct ll_inode_info *li = ll_i2info(dir);
 213         struct ldlm_res_id res_id =
 214                 { .name = { id_fid(&li->lli_id), id_group(&li->lli_id)} };
 215         struct lustre_handle lockh;
 216         struct obd_device *obddev = class_exp2obd(ll_i2sbi(dir)->ll_md_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_md_exp, &li->lli_id);
 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 *op_data;
 229
 230                 OBD_ALLOC(op_data, sizeof(*op_data));
 231                 if (op_data == NULL)
 232                         return ERR_PTR(-ENOMEM);
 233
 234                 ll_prepare_mdc_data(op_data, dir, NULL, NULL, 0, 0);
 235
 236                 rc = ll_intent_alloc(&it);
 237                 if (rc)
 238                         return ERR_PTR(rc);
 239
 240                 rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, LDLM_IBITS, &it,
 241                                 LCK_PR, op_data, &lockh, NULL, 0,
 242                                 ldlm_completion_ast, ll_mdc_blocking_ast, dir);
 243                 OBD_FREE(op_data, sizeof(*op_data));
 244
 245                 request = (struct ptlrpc_request *)LUSTRE_IT(&it)->it_data;
 246                 ll_intent_free(&it);
 247
 248                 if (request)
 249                         ptlrpc_req_finished(request);
 250                 if (rc < 0) {
 251                         CERROR("lock enqueue: rc: %d\n", rc);
 252                         return ERR_PTR(rc);
 253                 }
 254         } else {
 255                 if (ptlrpcs_check_cred(obddev->u.cli.cl_import)) {
 256                         /* return immediately if no credential held */
 257                         ldlm_lock_decref(&lockh, LCK_PR);
 258                         return ERR_PTR(-EACCES);
 259                 }
 260         }
 261         ldlm_lock_dump_handle(D_OTHER, &lockh);
 262
 263         page = read_cache_page(mapping, n,
 264                                (filler_t*)mapping->a_ops->readpage, NULL);
 265         if (!IS_ERR(page)) {
 266                 wait_on_page(page);
 267                 (void)kmap(page);
 268                 if (!PageUptodate(page))
 269                         goto fail;
 270                 if (!PageChecked(page))
 271                         ext2_check_page(page);
 272                 if (PageError(page))
 273                         goto fail;
 274         }
 275
 276 out_unlock:
 277         ldlm_lock_decref(&lockh, LCK_PR);
 278         return page;
 279
 280 fail:
 281         ext2_put_page(page);
 282         page = ERR_PTR(-EIO);
 283         goto out_unlock;
 284 }
 285
 286 /*
 287  * p is at least 6 bytes before the end of page
 288  */
 289 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
 290 {
 291         return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
 292 }
 293
 294 static inline unsigned
 295 ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 296 {
 297         ext2_dirent *de = (ext2_dirent*)(base + offset);
 298         ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
 299         while ((char*)p < (char*)de)
 300                 p = ext2_next_entry(p);
 301         return (char *)p - base;
 302 }
 303
 304 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
 305         [EXT2_FT_UNKNOWN]       DT_UNKNOWN,
 306         [EXT2_FT_REG_FILE]      DT_REG,
 307         [EXT2_FT_DIR]           DT_DIR,
 308         [EXT2_FT_CHRDEV]        DT_CHR,
 309         [EXT2_FT_BLKDEV]        DT_BLK,
 310         [EXT2_FT_FIFO]          DT_FIFO,
 311         [EXT2_FT_SOCK]          DT_SOCK,
 312         [EXT2_FT_SYMLINK]       DT_LNK,
 313 };
 314
 315
 316 int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
 317 {
 318         struct inode *inode = filp->f_dentry->d_inode;
 319         loff_t pos = filp->f_pos;
 320         // XXX struct super_block *sb = inode->i_sb;
 321         unsigned offset = pos & ~PAGE_CACHE_MASK;
 322         unsigned long n = pos >> PAGE_CACHE_SHIFT;
 323         unsigned long npages = dir_pages(inode);
 324         unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 325         unsigned char *types = ext2_filetype_table;
 326         int need_revalidate = (filp->f_version != inode->i_version);
 327         int rc = 0;
 328         ENTRY;
 329
 330         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %llu/%llu\n",
 331                inode->i_ino, inode->i_generation, inode, pos, inode->i_size);
 332
 333         if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 334                 RETURN(0);
 335
 336         for ( ; n < npages; n++, offset = 0) {
 337                 char *kaddr, *limit;
 338                 ext2_dirent *de;
 339                 struct page *page;
 340
 341                 CDEBUG(D_EXT2,"read %lu of dir %lu/%u page %lu/%lu size %llu\n",
 342                        PAGE_CACHE_SIZE, inode->i_ino, inode->i_generation,
 343                        n, npages, inode->i_size);
 344                 page = ll_get_dir_page(inode, n);
 345
 346                 /* size might have been updated by md_readpage() */
 347                 npages = dir_pages(inode);
 348
 349                 if (IS_ERR(page)) {
 350                         rc = PTR_ERR(page);
 351                         CERROR("error reading dir %lu/%u page %lu: rc %d\n",
 352                                inode->i_ino, inode->i_generation, n, rc);
 353                         continue;
 354                 }
 355
 356                 kaddr = page_address(page);
 357                 if (need_revalidate) {
 358                         offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 359                         need_revalidate = 0;
 360                 }
 361                 de = (ext2_dirent *)(kaddr+offset);
 362                 limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
 363                 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) {
 364                         if (de->inode) {
 365                                 int over;
 366
 367                                 rc = 0; /* no error if we return something */
 368
 369                                 offset = (char *)de - kaddr;
 370                                 over = filldir(dirent, de->name, de->name_len,
 371                                                (n<<PAGE_CACHE_SHIFT) | offset,
 372                                                le32_to_cpu(de->inode),
 373                                                types[de->file_type &
 374                                                      (EXT2_FT_MAX - 1)]);
 375
 376                                 if (over) {
 377                                         ext2_put_page(page);
 378                                         GOTO(done, rc);
 379                                 }
 380                         }
 381                 }
 382                 ext2_put_page(page);
 383         }
 384
 385         EXIT;
 386 done:
 387         filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
 388         filp->f_version = inode->i_version;
 389         update_atime(inode);
 390         return rc;
 391 }
 392
 393 static int ll_mkdir_stripe(struct inode *inode, unsigned long arg)
 394 {
 395         struct ptlrpc_request *request = NULL;
 396         struct ll_sb_info *sbi = ll_i2sbi(inode);
 397         struct ll_user_mkdir_stripe lums;
 398         struct mdc_op_data *op_data;
 399         u16 nstripes;
 400         mode_t mode;
 401         char *name;
 402         int err = 0;
 403         ENTRY;
 404
 405         if (copy_from_user(&lums, (void *)arg, sizeof(lums)))
 406                 RETURN(-EFAULT);
 407
 408         if (lums.lums_namelen <= 0)
 409                 RETURN(-EINVAL);
 410         OBD_ALLOC(name, lums.lums_namelen);
 411         if (!name)
 412                 RETURN(-ENOMEM);
 413
 414         if (copy_from_user(name, lums.lums_name, lums.lums_namelen))
 415                 GOTO(out, err = -EFAULT);
 416
 417         CDEBUG(D_VFSTRACE, "ioctl Op:name=%s,dir=%lu/%u(%p)\n",
 418                name, inode->i_ino, inode->i_generation, inode);
 419         nstripes = lums.lums_nstripes;
 420
 421         mode = lums.lums_mode;
 422         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
 423
 424         OBD_ALLOC(op_data, sizeof(*op_data));
 425         if (op_data == NULL)
 426                 GOTO(out, err = -ENOMEM);
 427         ll_prepare_mdc_data(op_data, inode, NULL, name,lums.lums_namelen,0);
 428         err = md_create(sbi->ll_md_exp, op_data, &nstripes, sizeof(nstripes),
 429                         mode, current->fsuid, current->fsgid, 0, &request);
 430         OBD_FREE(op_data, sizeof(*op_data));
 431         ptlrpc_req_finished(request);
 432         EXIT;
 433 out:
 434         OBD_FREE(name, lums.lums_namelen);
 435         return err;
 436 }
 437
 438 static int ll_dir_ioctl(struct inode *inode, struct file *file,
 439                         unsigned int cmd, unsigned long arg)
 440 {
 441         struct ll_sb_info *sbi = ll_i2sbi(inode);
 442         struct obd_ioctl_data *data;
 443         ENTRY;
 444
 445         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
 446                inode->i_ino, inode->i_generation, inode, cmd);
 447
 448         if (_IOC_TYPE(cmd) == 'T') /* tty ioctls */
 449                 return -ENOTTY;
 450
 451         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_IOCTL);
 452         switch(cmd) {
 453         case EXT3_IOC_GETFLAGS:
 454         case EXT3_IOC_SETFLAGS:
 455                 RETURN(ll_iocontrol(inode, file, cmd, arg));
 456         case IOC_MDC_LOOKUP: {
 457                 struct ptlrpc_request *request = NULL;
 458                 struct lustre_id id;
 459                 char *buf = NULL;
 460                 char *filename;
 461                 int namelen, rc, len = 0;
 462                 __u64 valid;
 463
 464                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 465                 if (rc)
 466                         RETURN(rc);
 467                 data = (void *)buf;
 468
 469                 filename = data->ioc_inlbuf1;
 470                 namelen = data->ioc_inllen1;
 471
 472                 if (namelen < 1) {
 473                         CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
 474                         GOTO(out, rc = -EINVAL);
 475                 }
 476
 477                 valid = OBD_MD_FLID;
 478                 ll_inode2id(&id, inode);
 479                 rc = md_getattr_lock(sbi->ll_md_exp, &id,
 480                                      filename, namelen, valid, 0, &request);
 481                 if (rc < 0) {
 482                         CDEBUG(D_INFO, "md_getattr_lock: %d\n", rc);
 483                         GOTO(out, rc);
 484                 }
 485
 486                 ptlrpc_req_finished(request);
 487
 488                 EXIT;
 489         out:
 490                 obd_ioctl_freedata(buf, len);
 491                 return rc;
 492         }
 493         case LL_IOC_MDC_MKDIRSTRIPE:
 494                 RETURN(ll_mkdir_stripe(inode, arg));
 495         case LL_IOC_LOV_SETSTRIPE: {
 496                 struct ptlrpc_request *request = NULL;
 497                 struct mdc_op_data *op_data;
 498                 struct iattr attr = { 0 };
 499                 struct lov_user_md lum, *lump = (struct lov_user_md *)arg;
 500                 int rc = 0;
 501
 502                 LASSERT(sizeof(lum) == sizeof(*lump));
 503                 LASSERT(sizeof(lum.lmm_objects[0]) ==
 504                         sizeof(lump->lmm_objects[0]));
 505                 rc = copy_from_user(&lum, lump, sizeof(lum));
 506                 if (rc)
 507                         RETURN(-EFAULT);
 508
 509                 if (lum.lmm_magic != LOV_USER_MAGIC)
 510                         RETURN(-EINVAL);
 511
 512                 OBD_ALLOC(op_data, sizeof(*op_data));
 513                 if (op_data == NULL)
 514                         RETURN(-ENOMEM);
 515
 516                 ll_prepare_mdc_data(op_data, inode, NULL, NULL, 0, 0);
 517
 518                 rc = md_setattr(sbi->ll_md_exp, op_data, &attr, &lum,
 519                                 sizeof(lum), NULL, 0, &request);
 520                 OBD_FREE(op_data, sizeof(*op_data));
 521                 ptlrpc_req_finished(request);
 522
 523                 if (rc) {
 524                         if (rc != -EPERM && rc != -EACCES)
 525                                 CERROR("md_setattr fails: rc = %d\n", rc);
 526                 }
 527                 RETURN(rc);
 528         }
 529         case LL_IOC_LOV_GETSTRIPE: {
 530                 struct ptlrpc_request *request = NULL;
 531                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 532                 struct lov_mds_md *lmm;
 533                 struct lustre_id id;
 534                 struct mds_body *body;
 535                 __u64 valid = 0;
 536                 int rc, lmmsize;
 537
 538                 valid |= OBD_MD_FLDIREA;
 539
 540                 ll_inode2id(&id, inode);
 541                 rc = md_getattr(sbi->ll_md_exp, &id, valid, NULL,
 542                                 obd_size_diskmd(sbi->ll_dt_exp, NULL),
 543                                 &request);
 544                 if (rc < 0) {
 545                         CDEBUG(D_INFO, "md_getattr failed: rc = %d\n", rc);
 546                         RETURN(rc);
 547                 }
 548
 549                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof(*body));
 550                 LASSERT(body != NULL);         /* checked by md_getattr_lock */
 551                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_lock */
 552
 553                 lmmsize = body->eadatasize;
 554                 if (lmmsize == 0)
 555                         GOTO(out_get, rc = -ENODATA);
 556
 557                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 558                 LASSERT(lmm != NULL);
 559                 LASSERT_REPSWABBED(request, 1);
 560                 rc = copy_to_user(lump, lmm, lmmsize);
 561                 if (rc)
 562                         GOTO(out_get, rc = -EFAULT);
 563
 564                 EXIT;
 565         out_get:
 566                 ptlrpc_req_finished(request);
 567                 RETURN(rc);
 568         }
 569         case IOC_MDC_SHOWFID: {
 570                 struct lustre_id *idp = (struct lustre_id *)arg;
 571                 struct lustre_id id;
 572                 char *filename;
 573                 int rc;
 574
 575                 filename = getname((const char *)arg);
 576                 if (IS_ERR(filename))
 577                         RETURN(PTR_ERR(filename));
 578
 579                 ll_inode2id(&id, inode);
 580
 581                 rc = ll_get_fid(sbi->ll_md_exp, &id, filename, &id);
 582                 if (rc < 0)
 583                         GOTO(out_filename, rc);
 584
 585                 rc = copy_to_user(idp, &id, sizeof(*idp));
 586                 if (rc)
 587                         GOTO(out_filename, rc = -EFAULT);
 588
 589                 EXIT;
 590         out_filename:
 591                 putname(filename);
 592                 return rc;
 593         }
 594         case IOC_MDC_GETSTRIPE: {
 595                 struct lov_user_md *lump = (struct lov_user_md *)arg;
 596                 struct ptlrpc_request *request = NULL;
 597                 struct lov_mds_md *lmm;
 598                 struct mds_body *body;
 599                 struct lustre_id id;
 600                 char *filename;
 601                 int rc, lmmsize;
 602
 603                 filename = getname((const char *)arg);
 604                 if (IS_ERR(filename))
 605                         RETURN(PTR_ERR(filename));
 606
 607                 ll_inode2id(&id, inode);
 608                 rc = md_getattr_lock(sbi->ll_md_exp, &id, filename,
 609                                      strlen(filename) + 1, OBD_MD_FLEASIZE,
 610                                      obd_size_diskmd(sbi->ll_dt_exp, NULL),
 611                                      &request);
 612                 if (rc < 0) {
 613                         CDEBUG(D_INFO, "md_getattr_lock failed on %s: rc %d\n",
 614                                filename, rc);
 615                         GOTO(out_name, rc);
 616                 }
 617
 618                 body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*body));
 619                 LASSERT(body != NULL);         /* checked by md_getattr_lock */
 620                 LASSERT_REPSWABBED(request, 0);/* swabbed by md_getattr_lock */
 621
 622                 lmmsize = body->eadatasize;
 623
 624                 if (!(body->valid & OBD_MD_FLEASIZE) || lmmsize == 0)
 625                         GOTO(out_req, rc = -ENODATA);
 626
 627                 if (lmmsize > 4096)
 628                         GOTO(out_req, rc = -EFBIG);
 629
 630                 lmm = lustre_msg_buf(request->rq_repmsg, 1, lmmsize);
 631                 LASSERT(lmm != NULL);
 632                 LASSERT_REPSWABBED(request, 1);
 633
 634                 rc = copy_to_user(lump, lmm, lmmsize);
 635                 if (rc)
 636                         GOTO(out_req, rc = -EFAULT);
 637
 638                 EXIT;
 639         out_req:
 640                 ptlrpc_req_finished(request);
 641         out_name:
 642                 putname(filename);
 643                 return rc;
 644         }
 645         case OBD_IOC_PING: {
 646                 struct ptlrpc_request *req = NULL;
 647                 char *buf = NULL;
 648                 int rc, len=0;
 649                 struct client_obd *cli;
 650                 struct obd_device *obd;
 651
 652                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 653                 if (rc)
 654                         RETURN(rc);
 655                 data = (void *)buf;
 656
 657                 obd = class_name2obd(data->ioc_inlbuf1);
 658
 659                 if (!obd )
 660                         GOTO(out_ping, rc = -ENODEV);
 661
 662                 if (!obd->obd_attached) {
 663                         CERROR("Device %d not attached\n", obd->obd_minor);
 664                         GOTO(out_ping, rc = -ENODEV);
 665                 }
 666                 if (!obd->obd_set_up) {
 667                         CERROR("Device %d still not setup\n", obd->obd_minor);
 668                         GOTO(out_ping, rc = -ENODEV);
 669                 }
 670                 cli = &obd->u.cli;
 671                 req = ptlrpc_prep_req(cli->cl_import, LUSTRE_OBD_VERSION,
 672                                       OBD_PING, 0, NULL, NULL);
 673                 if (!req)
 674                         GOTO(out_ping, rc = -ENOMEM);
 675
 676                 req->rq_replen = lustre_msg_size(0, NULL);
 677                 req->rq_send_state = LUSTRE_IMP_FULL;
 678
 679                 rc = ptlrpc_queue_wait(req);
 680
 681                 ptlrpc_req_finished(req);
 682         out_ping:
 683                 obd_ioctl_freedata(buf, len);
 684                 return rc;
 685         }
 686         case OBD_IOC_LLOG_CATINFO: {
 687                 struct ptlrpc_request *req = NULL;
 688                 char *buf = NULL;
 689                 int rc, len = 0;
 690                 char *bufs[2], *str;
 691                 int lens[2], size;
 692
 693                 rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
 694                 if (rc)
 695                         RETURN(rc);
 696                 data = (void *)buf;
 697
 698                 if (!data->ioc_inlbuf1) {
 699                         obd_ioctl_freedata(buf, len);
 700                         RETURN(-EINVAL);
 701                 }
 702
 703                 lens[0] = data->ioc_inllen1;
 704                 bufs[0] = data->ioc_inlbuf1;
 705                 if (data->ioc_inllen2) {
 706                         lens[1] = data->ioc_inllen2;
 707                         bufs[1] = data->ioc_inlbuf2;
 708                 } else {
 709                         lens[1] = 0;
 710                         bufs[1] = NULL;
 711                 }
 712                 size = data->ioc_plen1;
 713                 req = ptlrpc_prep_req(sbi2md(sbi)->cl_import,
 714                                       LUSTRE_LOG_VERSION, LLOG_CATINFO,
 715                                       2, lens, bufs);
 716                 if (!req)
 717                         GOTO(out_catinfo, rc = -ENOMEM);
 718
 719                 req->rq_replen = lustre_msg_size(1, &size);
 720
 721                 rc = ptlrpc_queue_wait(req);
 722                 str = lustre_msg_string(req->rq_repmsg, 0, data->ioc_plen1);
 723                 if (!rc)
 724                         rc = copy_to_user(data->ioc_pbuf1, str,
 725                                           data->ioc_plen1);
 726                 ptlrpc_req_finished(req);
 727         out_catinfo:
 728                 obd_ioctl_freedata(buf, len);
 729                 RETURN(rc);
 730         }
 731         case LL_IOC_FLUSH_CRED:
 732                 RETURN(ll_flush_cred(inode));
 733         default:
 734                 return obd_iocontrol(cmd, sbi->ll_dt_exp, 0,
 735                                      NULL, (void *)arg);
 736         }
 737 }
 738
 739 int ll_dir_open(struct inode *inode, struct file *file)
 740 {
 741         return ll_file_open(inode, file);
 742 }
 743
 744 int ll_dir_release(struct inode *inode, struct file *file)
 745 {
 746         return ll_file_release(inode, file);
 747 }
 748
 749 struct file_operations ll_dir_operations = {
 750         .open     = ll_dir_open,
 751         .release  = ll_dir_release,
 752         .read     = generic_read_dir,
 753         .readdir  = ll_readdir,
 754         .ioctl    = ll_dir_ioctl
 755 };
 756