linux/fs/ufs/util.h
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   1/*
   2 *  linux/fs/ufs/util.h
   3 *
   4 * Copyright (C) 1998 
   5 * Daniel Pirkl <daniel.pirkl@email.cz>
   6 * Charles University, Faculty of Mathematics and Physics
   7 */
   8
   9#include <linux/buffer_head.h>
  10#include <linux/fs.h>
  11#include "swab.h"
  12
  13
  14/*
  15 * some useful macros
  16 */
  17#define in_range(b,first,len)   ((b)>=(first)&&(b)<(first)+(len))
  18
  19/*
  20 * functions used for retyping
  21 */
  22static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
  23{
  24        return &cpi->c_ubh;
  25}
  26static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
  27{
  28        return &spi->s_ubh;
  29}
  30
  31
  32
  33/*
  34 * macros used for accessing structures
  35 */
  36static inline s32
  37ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  38                 struct ufs_super_block_third *usb3)
  39{
  40        switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  41        case UFS_ST_SUNOS:
  42                if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
  43                        return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
  44                /* Fall Through to UFS_ST_SUN */
  45        case UFS_ST_SUN:
  46                return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
  47        case UFS_ST_SUNx86:
  48                return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
  49        case UFS_ST_44BSD:
  50        default:
  51                return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
  52        }
  53}
  54
  55static inline void
  56ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  57                 struct ufs_super_block_third *usb3, s32 value)
  58{
  59        switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  60        case UFS_ST_SUNOS:
  61                if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
  62                        usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
  63                        break;
  64                }
  65                /* Fall Through to UFS_ST_SUN */
  66        case UFS_ST_SUN:
  67                usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
  68                break;
  69        case UFS_ST_SUNx86:
  70                usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
  71                break;
  72        case UFS_ST_44BSD:
  73                usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
  74                break;
  75        }
  76}
  77
  78static inline u32
  79ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
  80                  struct ufs_super_block_third *usb3)
  81{
  82        if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
  83                return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
  84        else
  85                return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
  86}
  87
  88static inline u64
  89ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
  90{
  91        __fs64 tmp;
  92
  93        switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  94        case UFS_ST_SUNOS:
  95        case UFS_ST_SUN:
  96                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
  97                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
  98                break;
  99        case UFS_ST_SUNx86:
 100                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
 101                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
 102                break;
 103        case UFS_ST_44BSD:
 104                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
 105                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
 106                break;
 107        }
 108
 109        return fs64_to_cpu(sb, tmp);
 110}
 111
 112static inline u64
 113ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 114{
 115        __fs64 tmp;
 116
 117        switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 118        case UFS_ST_SUNOS:
 119        case UFS_ST_SUN:
 120                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 121                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
 122                break;
 123        case UFS_ST_SUNx86:
 124                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
 125                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
 126                break;
 127        case UFS_ST_44BSD:
 128                ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
 129                ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
 130                break;
 131        }
 132
 133        return fs64_to_cpu(sb, tmp);
 134}
 135
 136static inline u16
 137ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
 138{
 139        if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 140                return fs16_to_cpu(sb, de->d_u.d_namlen);
 141        else
 142                return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
 143}
 144
 145static inline void
 146ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
 147{
 148        if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 149                de->d_u.d_namlen = cpu_to_fs16(sb, value);
 150        else
 151                de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
 152}
 153
 154static inline void
 155ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
 156{
 157        if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
 158                return;
 159
 160        /*
 161         * TODO turn this into a table lookup
 162         */
 163        switch (mode & S_IFMT) {
 164        case S_IFSOCK:
 165                de->d_u.d_44.d_type = DT_SOCK;
 166                break;
 167        case S_IFLNK:
 168                de->d_u.d_44.d_type = DT_LNK;
 169                break;
 170        case S_IFREG:
 171                de->d_u.d_44.d_type = DT_REG;
 172                break;
 173        case S_IFBLK:
 174                de->d_u.d_44.d_type = DT_BLK;
 175                break;
 176        case S_IFDIR:
 177                de->d_u.d_44.d_type = DT_DIR;
 178                break;
 179        case S_IFCHR:
 180                de->d_u.d_44.d_type = DT_CHR;
 181                break;
 182        case S_IFIFO:
 183                de->d_u.d_44.d_type = DT_FIFO;
 184                break;
 185        default:
 186                de->d_u.d_44.d_type = DT_UNKNOWN;
 187        }
 188}
 189
 190static inline u32
 191ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 192{
 193        switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 194        case UFS_UID_44BSD:
 195                return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
 196        case UFS_UID_EFT:
 197                if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 198                        return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 199                /* Fall through */
 200        default:
 201                return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 202        }
 203}
 204
 205static inline void
 206ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 207{
 208        switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 209        case UFS_UID_44BSD:
 210                inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
 211                inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 212                break;
 213        case UFS_UID_EFT:
 214                inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 215                if (value > 0xFFFF)
 216                        value = 0xFFFF;
 217                /* Fall through */
 218        default:
 219                inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 220                break;
 221        }
 222}
 223
 224static inline u32
 225ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 226{
 227        switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 228        case UFS_UID_44BSD:
 229                return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 230        case UFS_UID_EFT:
 231                if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 232                        return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 233                /* Fall through */
 234        default:
 235                return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 236        }
 237}
 238
 239static inline void
 240ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 241{
 242        switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 243        case UFS_UID_44BSD:
 244                inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
 245                inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 246                break;
 247        case UFS_UID_EFT:
 248                inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 249                if (value > 0xFFFF)
 250                        value = 0xFFFF;
 251                /* Fall through */
 252        default:
 253                inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 254                break;
 255        }
 256}
 257
 258extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 259extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 260extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
 261
 262/*
 263 * These functions manipulate ufs buffers
 264 */
 265#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)  
 266extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 267extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 268extern void ubh_brelse (struct ufs_buffer_head *);
 269extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 270extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 271extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 272extern void ubh_sync_block(struct ufs_buffer_head *);
 273extern void ubh_bforget (struct ufs_buffer_head *);
 274extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 275#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 276extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
 277#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
 278extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 279
 280/* This functions works with cache pages*/
 281extern struct page *ufs_get_locked_page(struct address_space *mapping,
 282                                        pgoff_t index);
 283static inline void ufs_put_locked_page(struct page *page)
 284{
 285       unlock_page(page);
 286       page_cache_release(page);
 287}
 288
 289
 290/*
 291 * macros and inline function to get important structures from ufs_sb_private_info
 292 */
 293
 294static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 295                                   unsigned int offset)
 296{
 297        unsigned int index;
 298        
 299        index = offset >> uspi->s_fshift;
 300        offset &= ~uspi->s_fmask;
 301        return uspi->s_ubh.bh[index]->b_data + offset;
 302}
 303
 304#define ubh_get_usb_first(uspi) \
 305        ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 306
 307#define ubh_get_usb_second(uspi) \
 308        ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 309
 310#define ubh_get_usb_third(uspi) \
 311        ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 312
 313
 314#define ubh_get_ucg(ubh) \
 315        ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 316
 317
 318/*
 319 * Extract byte from ufs_buffer_head
 320 * Extract the bits for a block from a map inside ufs_buffer_head
 321 */
 322#define ubh_get_addr8(ubh,begin) \
 323        ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 324        ((begin) & ~uspi->s_fmask))
 325
 326#define ubh_get_addr16(ubh,begin) \
 327        (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 328        ((begin) & ((uspi->fsize>>1) - 1)))
 329
 330#define ubh_get_addr32(ubh,begin) \
 331        (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 332        ((begin) & ((uspi->s_fsize>>2) - 1)))
 333
 334#define ubh_get_addr64(ubh,begin) \
 335        (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 336        ((begin) & ((uspi->s_fsize>>3) - 1)))
 337
 338#define ubh_get_addr ubh_get_addr8
 339
 340static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 341                                     struct ufs_buffer_head *ubh,
 342                                     u64 blk)
 343{
 344        if (uspi->fs_magic == UFS2_MAGIC)
 345                return ubh_get_addr64(ubh, blk);
 346        else
 347                return ubh_get_addr32(ubh, blk);
 348}
 349
 350#define ubh_blkmap(ubh,begin,bit) \
 351        ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 352
 353/*
 354 * Determine the number of available frags given a
 355 * percentage to hold in reserve.
 356 */
 357static inline u64
 358ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
 359{
 360        return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 361                uspi->cs_total.cs_nffree -
 362                (uspi->s_dsize * (percentreserved) / 100);
 363}
 364
 365/*
 366 * Macros to access cylinder group array structures
 367 */
 368#define ubh_cg_blktot(ucpi,cylno) \
 369        (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 370
 371#define ubh_cg_blks(ucpi,cylno,rpos) \
 372        (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 373        (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 374
 375/*
 376 * Bitmap operations
 377 * These functions work like classical bitmap operations.
 378 * The difference is that we don't have the whole bitmap
 379 * in one contiguous chunk of memory, but in several buffers.
 380 * The parameters of each function are super_block, ufs_buffer_head and
 381 * position of the beginning of the bitmap.
 382 */
 383#define ubh_setbit(ubh,begin,bit) \
 384        (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 385
 386#define ubh_clrbit(ubh,begin,bit) \
 387        (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 388
 389#define ubh_isset(ubh,begin,bit) \
 390        (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 391
 392#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 393
 394#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 395
 396#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 397static inline unsigned _ubh_find_next_zero_bit_(
 398        struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 399        unsigned begin, unsigned size, unsigned offset)
 400{
 401        unsigned base, count, pos;
 402
 403        size -= offset;
 404        begin <<= 3;
 405        offset += begin;
 406        base = offset >> uspi->s_bpfshift;
 407        offset &= uspi->s_bpfmask;
 408        for (;;) {
 409                count = min_t(unsigned int, size + offset, uspi->s_bpf);
 410                size -= count - offset;
 411                pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
 412                if (pos < count || !size)
 413                        break;
 414                base++;
 415                offset = 0;
 416        }
 417        return (base << uspi->s_bpfshift) + pos - begin;
 418}       
 419
 420static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 421        unsigned size, unsigned offset)
 422{
 423        unsigned bit, i;
 424        unsigned char * mapp;
 425        unsigned char map;
 426
 427        mapp = bitmap + (size >> 3);
 428        map = *mapp--;
 429        bit = 1 << (size & 7);
 430        for (i = size; i > offset; i--) {
 431                if ((map & bit) == 0)
 432                        break;
 433                if ((i & 7) != 0) {
 434                        bit >>= 1;
 435                } else {
 436                        map = *mapp--;
 437                        bit = 1 << 7;
 438                }
 439        }
 440        return i;
 441}
 442
 443#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 444static inline unsigned _ubh_find_last_zero_bit_(
 445        struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 446        unsigned begin, unsigned start, unsigned end)
 447{
 448        unsigned base, count, pos, size;
 449
 450        size = start - end;
 451        begin <<= 3;
 452        start += begin;
 453        base = start >> uspi->s_bpfshift;
 454        start &= uspi->s_bpfmask;
 455        for (;;) {
 456                count = min_t(unsigned int,
 457                            size + (uspi->s_bpf - start), uspi->s_bpf)
 458                        - (uspi->s_bpf - start);
 459                size -= count;
 460                pos = find_last_zero_bit (ubh->bh[base]->b_data,
 461                        start, start - count);
 462                if (pos > start - count || !size)
 463                        break;
 464                base--;
 465                start = uspi->s_bpf;
 466        }
 467        return (base << uspi->s_bpfshift) + pos - begin;
 468}       
 469
 470#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
 471
 472#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
 473static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
 474        struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 475{
 476        switch (uspi->s_fpb) {
 477        case 8:
 478                return (*ubh_get_addr (ubh, begin + block) == 0xff);
 479        case 4:
 480                return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
 481        case 2:
 482                return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
 483        case 1:
 484                return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
 485        }
 486        return 0;       
 487}
 488
 489#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
 490static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
 491        struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 492{
 493        switch (uspi->s_fpb) {
 494        case 8:
 495                *ubh_get_addr (ubh, begin + block) = 0x00;
 496                return; 
 497        case 4:
 498                *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
 499                return;
 500        case 2:
 501                *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
 502                return;
 503        case 1:
 504                *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
 505                return;
 506        }
 507}
 508
 509#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
 510static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
 511        struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 512{
 513        switch (uspi->s_fpb) {
 514        case 8:
 515                *ubh_get_addr(ubh, begin + block) = 0xff;
 516                return;
 517        case 4:
 518                *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
 519                return;
 520        case 2:
 521                *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
 522                return;
 523        case 1:
 524                *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
 525                return;
 526        }
 527}
 528
 529static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
 530        __fs32 * fraglist, int cnt)
 531{
 532        struct ufs_sb_private_info * uspi;
 533        unsigned fragsize, pos;
 534        
 535        uspi = UFS_SB(sb)->s_uspi;
 536        
 537        fragsize = 0;
 538        for (pos = 0; pos < uspi->s_fpb; pos++) {
 539                if (blockmap & (1 << pos)) {
 540                        fragsize++;
 541                }
 542                else if (fragsize > 0) {
 543                        fs32_add(sb, &fraglist[fragsize], cnt);
 544                        fragsize = 0;
 545                }
 546        }
 547        if (fragsize > 0 && fragsize < uspi->s_fpb)
 548                fs32_add(sb, &fraglist[fragsize], cnt);
 549}
 550
 551static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
 552                                            struct ufs_inode_info *ufsi,
 553                                            unsigned blk)
 554{
 555        BUG_ON(blk > UFS_TIND_BLOCK);
 556        return uspi->fs_magic == UFS2_MAGIC ?
 557                (void *)&ufsi->i_u1.u2_i_data[blk] :
 558                (void *)&ufsi->i_u1.i_data[blk];
 559}
 560
 561static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
 562{
 563        return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
 564                fs64_to_cpu(sb, *(__fs64 *)p) :
 565                fs32_to_cpu(sb, *(__fs32 *)p);
 566}
 567
 568static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
 569{
 570        if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
 571                *(__fs64 *)p = cpu_to_fs64(sb, val);
 572        else
 573                *(__fs32 *)p = cpu_to_fs32(sb, val);
 574}
 575
 576static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
 577                                      void *p)
 578{
 579        if (uspi->fs_magic == UFS2_MAGIC)
 580                *(__fs64 *)p = 0;
 581        else
 582                *(__fs32 *)p = 0;
 583}
 584
 585static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
 586                                       void *p)
 587{
 588        if (uspi->fs_magic == UFS2_MAGIC)
 589                return *(__fs64 *)p == 0;
 590        else
 591                return *(__fs32 *)p == 0;
 592}
 593
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