fs/ufs/util.h

   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  */
  22 static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
  23 {
  24         return &cpi->c_ubh;
  25 }
  26 static 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  */
  36 static inline s32
  37 ufs_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
  55 static inline void
  56 ufs_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
  78 static inline u32
  79 ufs_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
  88 static inline u64
  89 ufs_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
 112 static inline u64
 113 ufs_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
 136 static inline u16
 137 ufs_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
 145 static inline void
 146 ufs_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
 154 static inline void
 155 ufs_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
 190 static inline u32
 191 ufs_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
 205 static inline void
 206 ufs_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
 224 static inline u32
 225 ufs_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
 239 static inline void
 240 ufs_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
 258 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 259 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 260 extern 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)
 266 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 267 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 268 extern void ubh_brelse (struct ufs_buffer_head *);
 269 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 270 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 271 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 272 extern void ubh_sync_block(struct ufs_buffer_head *);
 273 extern void ubh_bforget (struct ufs_buffer_head *);
 274 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 275 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 276 extern 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)
 278 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 279
 280 /* This functions works with cache pages*/
 281 extern struct page *ufs_get_locked_page(struct address_space *mapping,
 282                                         pgoff_t index);
 283 static inline void ufs_put_locked_page(struct page *page)
 284 {
 285        unlock_page(page);
 286        put_page(page);
 287 }
 288
 289
 290 /*
 291  * macros and inline function to get important structures from ufs_sb_private_info
 292  */
 293
 294 static 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
 340 static 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  */
 357 static inline u64
 358 ufs_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)
 397 static 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
 420 static 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)
 444 static 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)
 473 static 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)
 490 static 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)
 510 static 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
 529 static 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
 551 static 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
 561 static 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
 568 static 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
 576 static 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
 585 static 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 }