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