linux/fs/ufs/inode.c
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   1/*
   2 *  linux/fs/ufs/inode.c
   3 *
   4 * Copyright (C) 1998
   5 * Daniel Pirkl <daniel.pirkl@email.cz>
   6 * Charles University, Faculty of Mathematics and Physics
   7 *
   8 *  from
   9 *
  10 *  linux/fs/ext2/inode.c
  11 *
  12 * Copyright (C) 1992, 1993, 1994, 1995
  13 * Remy Card (card@masi.ibp.fr)
  14 * Laboratoire MASI - Institut Blaise Pascal
  15 * Universite Pierre et Marie Curie (Paris VI)
  16 *
  17 *  from
  18 *
  19 *  linux/fs/minix/inode.c
  20 *
  21 *  Copyright (C) 1991, 1992  Linus Torvalds
  22 *
  23 *  Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  24 *  Big-endian to little-endian byte-swapping/bitmaps by
  25 *        David S. Miller (davem@caip.rutgers.edu), 1995
  26 */
  27
  28#include <asm/uaccess.h>
  29#include <asm/system.h>
  30
  31#include <linux/errno.h>
  32#include <linux/fs.h>
  33#include <linux/time.h>
  34#include <linux/stat.h>
  35#include <linux/string.h>
  36#include <linux/mm.h>
  37#include <linux/smp_lock.h>
  38#include <linux/buffer_head.h>
  39
  40#include "ufs_fs.h"
  41#include "ufs.h"
  42#include "swab.h"
  43#include "util.h"
  44
  45static u64 ufs_frag_map(struct inode *inode, sector_t frag);
  46
  47static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
  48{
  49        struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  50        int ptrs = uspi->s_apb;
  51        int ptrs_bits = uspi->s_apbshift;
  52        const long direct_blocks = UFS_NDADDR,
  53                indirect_blocks = ptrs,
  54                double_blocks = (1 << (ptrs_bits * 2));
  55        int n = 0;
  56
  57
  58        UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
  59        if (i_block < direct_blocks) {
  60                offsets[n++] = i_block;
  61        } else if ((i_block -= direct_blocks) < indirect_blocks) {
  62                offsets[n++] = UFS_IND_BLOCK;
  63                offsets[n++] = i_block;
  64        } else if ((i_block -= indirect_blocks) < double_blocks) {
  65                offsets[n++] = UFS_DIND_BLOCK;
  66                offsets[n++] = i_block >> ptrs_bits;
  67                offsets[n++] = i_block & (ptrs - 1);
  68        } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  69                offsets[n++] = UFS_TIND_BLOCK;
  70                offsets[n++] = i_block >> (ptrs_bits * 2);
  71                offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  72                offsets[n++] = i_block & (ptrs - 1);
  73        } else {
  74                ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  75        }
  76        return n;
  77}
  78
  79/*
  80 * Returns the location of the fragment from
  81 * the begining of the filesystem.
  82 */
  83
  84static u64 ufs_frag_map(struct inode *inode, sector_t frag)
  85{
  86        struct ufs_inode_info *ufsi = UFS_I(inode);
  87        struct super_block *sb = inode->i_sb;
  88        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  89        u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
  90        int shift = uspi->s_apbshift-uspi->s_fpbshift;
  91        sector_t offsets[4], *p;
  92        int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
  93        u64  ret = 0L;
  94        __fs32 block;
  95        __fs64 u2_block = 0L;
  96        unsigned flags = UFS_SB(sb)->s_flags;
  97        u64 temp = 0L;
  98
  99        UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
 100        UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 101                uspi->s_fpbshift, uspi->s_apbmask,
 102                (unsigned long long)mask);
 103
 104        if (depth == 0)
 105                return 0;
 106
 107        p = offsets;
 108
 109        lock_kernel();
 110        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 111                goto ufs2;
 112
 113        block = ufsi->i_u1.i_data[*p++];
 114        if (!block)
 115                goto out;
 116        while (--depth) {
 117                struct buffer_head *bh;
 118                sector_t n = *p++;
 119
 120                bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
 121                if (!bh)
 122                        goto out;
 123                block = ((__fs32 *) bh->b_data)[n & mask];
 124                brelse (bh);
 125                if (!block)
 126                        goto out;
 127        }
 128        ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
 129        goto out;
 130ufs2:
 131        u2_block = ufsi->i_u1.u2_i_data[*p++];
 132        if (!u2_block)
 133                goto out;
 134
 135
 136        while (--depth) {
 137                struct buffer_head *bh;
 138                sector_t n = *p++;
 139
 140
 141                temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
 142                bh = sb_bread(sb, temp +(u64) (n>>shift));
 143                if (!bh)
 144                        goto out;
 145                u2_block = ((__fs64 *)bh->b_data)[n & mask];
 146                brelse(bh);
 147                if (!u2_block)
 148                        goto out;
 149        }
 150        temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
 151        ret = temp + (u64) (frag & uspi->s_fpbmask);
 152
 153out:
 154        unlock_kernel();
 155        return ret;
 156}
 157
 158/**
 159 * ufs_inode_getfrag() - allocate new fragment(s)
 160 * @inode - pointer to inode
 161 * @fragment - number of `fragment' which hold pointer
 162 *   to new allocated fragment(s)
 163 * @new_fragment - number of new allocated fragment(s)
 164 * @required - how many fragment(s) we require
 165 * @err - we set it if something wrong
 166 * @phys - pointer to where we save physical number of new allocated fragments,
 167 *   NULL if we allocate not data(indirect blocks for example).
 168 * @new - we set it if we allocate new block
 169 * @locked_page - for ufs_new_fragments()
 170 */
 171static struct buffer_head *
 172ufs_inode_getfrag(struct inode *inode, u64 fragment,
 173                  sector_t new_fragment, unsigned int required, int *err,
 174                  long *phys, int *new, struct page *locked_page)
 175{
 176        struct ufs_inode_info *ufsi = UFS_I(inode);
 177        struct super_block *sb = inode->i_sb;
 178        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 179        struct buffer_head * result;
 180        unsigned blockoff, lastblockoff;
 181        u64 tmp, goal, lastfrag, block, lastblock;
 182        void *p, *p2;
 183
 184        UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
 185             "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
 186             (unsigned long long)new_fragment, required, !phys);
 187
 188        /* TODO : to be done for write support
 189        if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 190             goto ufs2;
 191         */
 192
 193        block = ufs_fragstoblks (fragment);
 194        blockoff = ufs_fragnum (fragment);
 195        p = ufs_get_direct_data_ptr(uspi, ufsi, block);
 196
 197        goal = 0;
 198
 199repeat:
 200        tmp = ufs_data_ptr_to_cpu(sb, p);
 201
 202        lastfrag = ufsi->i_lastfrag;
 203        if (tmp && fragment < lastfrag) {
 204                if (!phys) {
 205                        result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 206                        if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
 207                                UFSD("EXIT, result %llu\n",
 208                                     (unsigned long long)tmp + blockoff);
 209                                return result;
 210                        }
 211                        brelse (result);
 212                        goto repeat;
 213                } else {
 214                        *phys = uspi->s_sbbase + tmp + blockoff;
 215                        return NULL;
 216                }
 217        }
 218
 219        lastblock = ufs_fragstoblks (lastfrag);
 220        lastblockoff = ufs_fragnum (lastfrag);
 221        /*
 222         * We will extend file into new block beyond last allocated block
 223         */
 224        if (lastblock < block) {
 225                /*
 226                 * We must reallocate last allocated block
 227                 */
 228                if (lastblockoff) {
 229                        p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
 230                        tmp = ufs_new_fragments(inode, p2, lastfrag,
 231                                                ufs_data_ptr_to_cpu(sb, p2),
 232                                                uspi->s_fpb - lastblockoff,
 233                                                err, locked_page);
 234                        if (!tmp) {
 235                                if (lastfrag != ufsi->i_lastfrag)
 236                                        goto repeat;
 237                                else
 238                                        return NULL;
 239                        }
 240                        lastfrag = ufsi->i_lastfrag;
 241                        
 242                }
 243                tmp = ufs_data_ptr_to_cpu(sb,
 244                                         ufs_get_direct_data_ptr(uspi, ufsi,
 245                                                                 lastblock));
 246                if (tmp)
 247                        goal = tmp + uspi->s_fpb;
 248                tmp = ufs_new_fragments (inode, p, fragment - blockoff, 
 249                                         goal, required + blockoff,
 250                                         err,
 251                                         phys != NULL ? locked_page : NULL);
 252        } else if (lastblock == block) {
 253        /*
 254         * We will extend last allocated block
 255         */
 256                tmp = ufs_new_fragments(inode, p, fragment -
 257                                        (blockoff - lastblockoff),
 258                                        ufs_data_ptr_to_cpu(sb, p),
 259                                        required +  (blockoff - lastblockoff),
 260                                        err, phys != NULL ? locked_page : NULL);
 261        } else /* (lastblock > block) */ {
 262        /*
 263         * We will allocate new block before last allocated block
 264         */
 265                if (block) {
 266                        tmp = ufs_data_ptr_to_cpu(sb,
 267                                                 ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
 268                        if (tmp)
 269                                goal = tmp + uspi->s_fpb;
 270                }
 271                tmp = ufs_new_fragments(inode, p, fragment - blockoff,
 272                                        goal, uspi->s_fpb, err,
 273                                        phys != NULL ? locked_page : NULL);
 274        }
 275        if (!tmp) {
 276                if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
 277                    (blockoff && lastfrag != ufsi->i_lastfrag))
 278                        goto repeat;
 279                *err = -ENOSPC;
 280                return NULL;
 281        }
 282
 283        if (!phys) {
 284                result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 285        } else {
 286                *phys = uspi->s_sbbase + tmp + blockoff;
 287                result = NULL;
 288                *err = 0;
 289                *new = 1;
 290        }
 291
 292        inode->i_ctime = CURRENT_TIME_SEC;
 293        if (IS_SYNC(inode))
 294                ufs_sync_inode (inode);
 295        mark_inode_dirty(inode);
 296        UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
 297        return result;
 298
 299     /* This part : To be implemented ....
 300        Required only for writing, not required for READ-ONLY.
 301ufs2:
 302
 303        u2_block = ufs_fragstoblks(fragment);
 304        u2_blockoff = ufs_fragnum(fragment);
 305        p = ufsi->i_u1.u2_i_data + block;
 306        goal = 0;
 307
 308repeat2:
 309        tmp = fs32_to_cpu(sb, *p);
 310        lastfrag = ufsi->i_lastfrag;
 311
 312     */
 313}
 314
 315/**
 316 * ufs_inode_getblock() - allocate new block
 317 * @inode - pointer to inode
 318 * @bh - pointer to block which hold "pointer" to new allocated block
 319 * @fragment - number of `fragment' which hold pointer
 320 *   to new allocated block
 321 * @new_fragment - number of new allocated fragment
 322 *  (block will hold this fragment and also uspi->s_fpb-1)
 323 * @err - see ufs_inode_getfrag()
 324 * @phys - see ufs_inode_getfrag()
 325 * @new - see ufs_inode_getfrag()
 326 * @locked_page - see ufs_inode_getfrag()
 327 */
 328static struct buffer_head *
 329ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
 330                  u64 fragment, sector_t new_fragment, int *err,
 331                  long *phys, int *new, struct page *locked_page)
 332{
 333        struct super_block *sb = inode->i_sb;
 334        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 335        struct buffer_head * result;
 336        unsigned blockoff;
 337        u64 tmp, goal, block;
 338        void *p;
 339
 340        block = ufs_fragstoblks (fragment);
 341        blockoff = ufs_fragnum (fragment);
 342
 343        UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
 344             inode->i_ino, (unsigned long long)fragment,
 345             (unsigned long long)new_fragment, !phys);
 346
 347        result = NULL;
 348        if (!bh)
 349                goto out;
 350        if (!buffer_uptodate(bh)) {
 351                ll_rw_block (READ, 1, &bh);
 352                wait_on_buffer (bh);
 353                if (!buffer_uptodate(bh))
 354                        goto out;
 355        }
 356        if (uspi->fs_magic == UFS2_MAGIC)
 357                p = (__fs64 *)bh->b_data + block;
 358        else
 359                p = (__fs32 *)bh->b_data + block;
 360repeat:
 361        tmp = ufs_data_ptr_to_cpu(sb, p);
 362        if (tmp) {
 363                if (!phys) {
 364                        result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 365                        if (tmp == ufs_data_ptr_to_cpu(sb, p))
 366                                goto out;
 367                        brelse (result);
 368                        goto repeat;
 369                } else {
 370                        *phys = uspi->s_sbbase + tmp + blockoff;
 371                        goto out;
 372                }
 373        }
 374
 375        if (block && (uspi->fs_magic == UFS2_MAGIC ?
 376                      (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
 377                      (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
 378                goal = tmp + uspi->s_fpb;
 379        else
 380                goal = bh->b_blocknr + uspi->s_fpb;
 381        tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
 382                                uspi->s_fpb, err, locked_page);
 383        if (!tmp) {
 384                if (ufs_data_ptr_to_cpu(sb, p))
 385                        goto repeat;
 386                goto out;
 387        }               
 388
 389
 390        if (!phys) {
 391                result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 392        } else {
 393                *phys = uspi->s_sbbase + tmp + blockoff;
 394                *new = 1;
 395        }
 396
 397        mark_buffer_dirty(bh);
 398        if (IS_SYNC(inode))
 399                sync_dirty_buffer(bh);
 400        inode->i_ctime = CURRENT_TIME_SEC;
 401        mark_inode_dirty(inode);
 402        UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
 403out:
 404        brelse (bh);
 405        UFSD("EXIT\n");
 406        return result;
 407}
 408
 409/**
 410 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
 411 * readpage, writepage and so on
 412 */
 413
 414int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 415{
 416        struct super_block * sb = inode->i_sb;
 417        struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 418        struct buffer_head * bh;
 419        int ret, err, new;
 420        unsigned long ptr,phys;
 421        u64 phys64 = 0;
 422        
 423        if (!create) {
 424                phys64 = ufs_frag_map(inode, fragment);
 425                UFSD("phys64 = %llu\n", (unsigned long long)phys64);
 426                if (phys64)
 427                        map_bh(bh_result, sb, phys64);
 428                return 0;
 429        }
 430
 431        /* This code entered only while writing ....? */
 432
 433        err = -EIO;
 434        new = 0;
 435        ret = 0;
 436        bh = NULL;
 437
 438        lock_kernel();
 439
 440        UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
 441        if (fragment >
 442            ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 443             << uspi->s_fpbshift))
 444                goto abort_too_big;
 445
 446        err = 0;
 447        ptr = fragment;
 448          
 449        /*
 450         * ok, these macros clean the logic up a bit and make
 451         * it much more readable:
 452         */
 453#define GET_INODE_DATABLOCK(x) \
 454        ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
 455                          bh_result->b_page)
 456#define GET_INODE_PTR(x) \
 457        ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
 458                          bh_result->b_page)
 459#define GET_INDIRECT_DATABLOCK(x) \
 460        ufs_inode_getblock(inode, bh, x, fragment,      \
 461                          &err, &phys, &new, bh_result->b_page)
 462#define GET_INDIRECT_PTR(x) \
 463        ufs_inode_getblock(inode, bh, x, fragment,      \
 464                          &err, NULL, NULL, NULL)
 465
 466        if (ptr < UFS_NDIR_FRAGMENT) {
 467                bh = GET_INODE_DATABLOCK(ptr);
 468                goto out;
 469        }
 470        ptr -= UFS_NDIR_FRAGMENT;
 471        if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 472                bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 473                goto get_indirect;
 474        }
 475        ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 476        if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 477                bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 478                goto get_double;
 479        }
 480        ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 481        bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 482        bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 483get_double:
 484        bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 485get_indirect:
 486        bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 487
 488#undef GET_INODE_DATABLOCK
 489#undef GET_INODE_PTR
 490#undef GET_INDIRECT_DATABLOCK
 491#undef GET_INDIRECT_PTR
 492
 493out:
 494        if (err)
 495                goto abort;
 496        if (new)
 497                set_buffer_new(bh_result);
 498        map_bh(bh_result, sb, phys);
 499abort:
 500        unlock_kernel();
 501        return err;
 502
 503abort_too_big:
 504        ufs_warning(sb, "ufs_get_block", "block > big");
 505        goto abort;
 506}
 507
 508static struct buffer_head *ufs_getfrag(struct inode *inode,
 509                                       unsigned int fragment,
 510                                       int create, int *err)
 511{
 512        struct buffer_head dummy;
 513        int error;
 514
 515        dummy.b_state = 0;
 516        dummy.b_blocknr = -1000;
 517        error = ufs_getfrag_block(inode, fragment, &dummy, create);
 518        *err = error;
 519        if (!error && buffer_mapped(&dummy)) {
 520                struct buffer_head *bh;
 521                bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 522                if (buffer_new(&dummy)) {
 523                        memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 524                        set_buffer_uptodate(bh);
 525                        mark_buffer_dirty(bh);
 526                }
 527                return bh;
 528        }
 529        return NULL;
 530}
 531
 532struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 533        int create, int * err)
 534{
 535        struct buffer_head * bh;
 536
 537        UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
 538        bh = ufs_getfrag (inode, fragment, create, err);
 539        if (!bh || buffer_uptodate(bh))                 
 540                return bh;
 541        ll_rw_block (READ, 1, &bh);
 542        wait_on_buffer (bh);
 543        if (buffer_uptodate(bh))
 544                return bh;
 545        brelse (bh);
 546        *err = -EIO;
 547        return NULL;
 548}
 549
 550static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 551{
 552        return block_write_full_page(page,ufs_getfrag_block,wbc);
 553}
 554
 555static int ufs_readpage(struct file *file, struct page *page)
 556{
 557        return block_read_full_page(page,ufs_getfrag_block);
 558}
 559
 560int __ufs_write_begin(struct file *file, struct address_space *mapping,
 561                        loff_t pos, unsigned len, unsigned flags,
 562                        struct page **pagep, void **fsdata)
 563{
 564        return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 565                                ufs_getfrag_block);
 566}
 567
 568static int ufs_write_begin(struct file *file, struct address_space *mapping,
 569                        loff_t pos, unsigned len, unsigned flags,
 570                        struct page **pagep, void **fsdata)
 571{
 572        *pagep = NULL;
 573        return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
 574}
 575
 576static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 577{
 578        return generic_block_bmap(mapping,block,ufs_getfrag_block);
 579}
 580
 581const struct address_space_operations ufs_aops = {
 582        .readpage = ufs_readpage,
 583        .writepage = ufs_writepage,
 584        .sync_page = block_sync_page,
 585        .write_begin = ufs_write_begin,
 586        .write_end = generic_write_end,
 587        .bmap = ufs_bmap
 588};
 589
 590static void ufs_set_inode_ops(struct inode *inode)
 591{
 592        if (S_ISREG(inode->i_mode)) {
 593                inode->i_op = &ufs_file_inode_operations;
 594                inode->i_fop = &ufs_file_operations;
 595                inode->i_mapping->a_ops = &ufs_aops;
 596        } else if (S_ISDIR(inode->i_mode)) {
 597                inode->i_op = &ufs_dir_inode_operations;
 598                inode->i_fop = &ufs_dir_operations;
 599                inode->i_mapping->a_ops = &ufs_aops;
 600        } else if (S_ISLNK(inode->i_mode)) {
 601                if (!inode->i_blocks)
 602                        inode->i_op = &ufs_fast_symlink_inode_operations;
 603                else {
 604                        inode->i_op = &page_symlink_inode_operations;
 605                        inode->i_mapping->a_ops = &ufs_aops;
 606                }
 607        } else
 608                init_special_inode(inode, inode->i_mode,
 609                                   ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
 610}
 611
 612static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 613{
 614        struct ufs_inode_info *ufsi = UFS_I(inode);
 615        struct super_block *sb = inode->i_sb;
 616        mode_t mode;
 617
 618        /*
 619         * Copy data to the in-core inode.
 620         */
 621        inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 622        inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 623        if (inode->i_nlink == 0) {
 624                ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 625                return -1;
 626        }
 627        
 628        /*
 629         * Linux now has 32-bit uid and gid, so we can support EFT.
 630         */
 631        inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 632        inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 633
 634        inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 635        inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 636        inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 637        inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 638        inode->i_mtime.tv_nsec = 0;
 639        inode->i_atime.tv_nsec = 0;
 640        inode->i_ctime.tv_nsec = 0;
 641        inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 642        inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
 643        ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 644        ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 645        ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 646
 647        
 648        if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 649                memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 650                       sizeof(ufs_inode->ui_u2.ui_addr));
 651        } else {
 652                memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
 653                       sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
 654                ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
 655        }
 656        return 0;
 657}
 658
 659static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
 660{
 661        struct ufs_inode_info *ufsi = UFS_I(inode);
 662        struct super_block *sb = inode->i_sb;
 663        mode_t mode;
 664
 665        UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
 666        /*
 667         * Copy data to the in-core inode.
 668         */
 669        inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 670        inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 671        if (inode->i_nlink == 0) {
 672                ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 673                return -1;
 674        }
 675
 676        /*
 677         * Linux now has 32-bit uid and gid, so we can support EFT.
 678         */
 679        inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 680        inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 681
 682        inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 683        inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
 684        inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
 685        inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
 686        inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
 687        inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
 688        inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
 689        inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 690        inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 691        ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 692        /*
 693        ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 694        ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 695        */
 696
 697        if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 698                memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
 699                       sizeof(ufs2_inode->ui_u2.ui_addr));
 700        } else {
 701                memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
 702                       sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
 703                ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
 704        }
 705        return 0;
 706}
 707
 708struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
 709{
 710        struct ufs_inode_info *ufsi;
 711        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 712        struct buffer_head * bh;
 713        struct inode *inode;
 714        int err;
 715
 716        UFSD("ENTER, ino %lu\n", ino);
 717
 718        if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
 719                ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
 720                            ino);
 721                return ERR_PTR(-EIO);
 722        }
 723
 724        inode = iget_locked(sb, ino);
 725        if (!inode)
 726                return ERR_PTR(-ENOMEM);
 727        if (!(inode->i_state & I_NEW))
 728                return inode;
 729
 730        ufsi = UFS_I(inode);
 731
 732        bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 733        if (!bh) {
 734                ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
 735                            inode->i_ino);
 736                goto bad_inode;
 737        }
 738        if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 739                struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 740
 741                err = ufs2_read_inode(inode,
 742                                      ufs2_inode + ufs_inotofsbo(inode->i_ino));
 743        } else {
 744                struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
 745
 746                err = ufs1_read_inode(inode,
 747                                      ufs_inode + ufs_inotofsbo(inode->i_ino));
 748        }
 749
 750        if (err)
 751                goto bad_inode;
 752        inode->i_version++;
 753        ufsi->i_lastfrag =
 754                (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 755        ufsi->i_dir_start_lookup = 0;
 756        ufsi->i_osync = 0;
 757
 758        ufs_set_inode_ops(inode);
 759
 760        brelse(bh);
 761
 762        UFSD("EXIT\n");
 763        unlock_new_inode(inode);
 764        return inode;
 765
 766bad_inode:
 767        iget_failed(inode);
 768        return ERR_PTR(-EIO);
 769}
 770
 771static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 772{
 773        struct super_block *sb = inode->i_sb;
 774        struct ufs_inode_info *ufsi = UFS_I(inode);
 775
 776        ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 777        ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 778
 779        ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 780        ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 781                
 782        ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 783        ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 784        ufs_inode->ui_atime.tv_usec = 0;
 785        ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 786        ufs_inode->ui_ctime.tv_usec = 0;
 787        ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 788        ufs_inode->ui_mtime.tv_usec = 0;
 789        ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 790        ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 791        ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 792
 793        if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
 794                ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 795                ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 796        }
 797
 798        if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 799                /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 800                ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 801        } else if (inode->i_blocks) {
 802                memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
 803                       sizeof(ufs_inode->ui_u2.ui_addr));
 804        }
 805        else {
 806                memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 807                       sizeof(ufs_inode->ui_u2.ui_symlink));
 808        }
 809
 810        if (!inode->i_nlink)
 811                memset (ufs_inode, 0, sizeof(struct ufs_inode));
 812}
 813
 814static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
 815{
 816        struct super_block *sb = inode->i_sb;
 817        struct ufs_inode_info *ufsi = UFS_I(inode);
 818
 819        UFSD("ENTER\n");
 820        ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 821        ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 822
 823        ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
 824        ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
 825
 826        ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 827        ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
 828        ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
 829        ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
 830        ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
 831        ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
 832        ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
 833
 834        ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
 835        ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 836        ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 837
 838        if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 839                /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 840                ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
 841        } else if (inode->i_blocks) {
 842                memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
 843                       sizeof(ufs_inode->ui_u2.ui_addr));
 844        } else {
 845                memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 846                       sizeof(ufs_inode->ui_u2.ui_symlink));
 847        }
 848
 849        if (!inode->i_nlink)
 850                memset (ufs_inode, 0, sizeof(struct ufs2_inode));
 851        UFSD("EXIT\n");
 852}
 853
 854static int ufs_update_inode(struct inode * inode, int do_sync)
 855{
 856        struct super_block *sb = inode->i_sb;
 857        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 858        struct buffer_head * bh;
 859
 860        UFSD("ENTER, ino %lu\n", inode->i_ino);
 861
 862        if (inode->i_ino < UFS_ROOTINO ||
 863            inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 864                ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 865                return -1;
 866        }
 867
 868        bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 869        if (!bh) {
 870                ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 871                return -1;
 872        }
 873        if (uspi->fs_magic == UFS2_MAGIC) {
 874                struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 875
 876                ufs2_update_inode(inode,
 877                                  ufs2_inode + ufs_inotofsbo(inode->i_ino));
 878        } else {
 879                struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
 880
 881                ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 882        }
 883                
 884        mark_buffer_dirty(bh);
 885        if (do_sync)
 886                sync_dirty_buffer(bh);
 887        brelse (bh);
 888        
 889        UFSD("EXIT\n");
 890        return 0;
 891}
 892
 893int ufs_write_inode (struct inode * inode, int wait)
 894{
 895        int ret;
 896        lock_kernel();
 897        ret = ufs_update_inode (inode, wait);
 898        unlock_kernel();
 899        return ret;
 900}
 901
 902int ufs_sync_inode (struct inode *inode)
 903{
 904        return ufs_update_inode (inode, 1);
 905}
 906
 907void ufs_delete_inode (struct inode * inode)
 908{
 909        loff_t old_i_size;
 910
 911        truncate_inode_pages(&inode->i_data, 0);
 912        if (is_bad_inode(inode))
 913                goto no_delete;
 914        /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 915        lock_kernel();
 916        mark_inode_dirty(inode);
 917        ufs_update_inode(inode, IS_SYNC(inode));
 918        old_i_size = inode->i_size;
 919        inode->i_size = 0;
 920        if (inode->i_blocks && ufs_truncate(inode, old_i_size))
 921                ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
 922        ufs_free_inode (inode);
 923        unlock_kernel();
 924        return;
 925no_delete:
 926        clear_inode(inode);     /* We must guarantee clearing of inode... */
 927}
 928