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 <<<<<<< HEAD:fs/ufs/util.h
  62                 if (fs32_to_cpu(sb, usb3->fs_postblformat == UFS_42POSTBLFMT)) {
  63 =======
  64                 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
  65 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/ufs/util.h
  66                         usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
  67                         break;
  68                 }
  69                 /* Fall Through to UFS_ST_SUN */
  70         case UFS_ST_SUN:
  71                 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
  72                 break;
  73         case UFS_ST_SUNx86:
  74                 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
  75                 break;
  76         case UFS_ST_44BSD:
  77                 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
  78                 break;
  79         }
  80 }
  81
  82 static inline u32
  83 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
  84                   struct ufs_super_block_third *usb3)
  85 {
  86         if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
  87                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
  88         else
  89                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
  90 }
  91
  92 static inline u64
  93 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
  94 {
  95         __fs64 tmp;
  96
  97         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  98         case UFS_ST_SUNOS:
  99         case UFS_ST_SUN:
 100                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
 101                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
 102                 break;
 103         case UFS_ST_SUNx86:
 104                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
 105                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
 106                 break;
 107         case UFS_ST_44BSD:
 108                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
 109                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
 110                 break;
 111         }
 112
 113         return fs64_to_cpu(sb, tmp);
 114 }
 115
 116 static inline u64
 117 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 118 {
 119         __fs64 tmp;
 120
 121         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 122         case UFS_ST_SUNOS:
 123         case UFS_ST_SUN:
 124                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 125                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
 126                 break;
 127         case UFS_ST_SUNx86:
 128                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
 129                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
 130                 break;
 131         case UFS_ST_44BSD:
 132                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
 133                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
 134                 break;
 135         }
 136
 137         return fs64_to_cpu(sb, tmp);
 138 }
 139
 140 static inline u16
 141 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
 142 {
 143         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 144                 return fs16_to_cpu(sb, de->d_u.d_namlen);
 145         else
 146                 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
 147 }
 148
 149 static inline void
 150 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
 151 {
 152         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 153                 de->d_u.d_namlen = cpu_to_fs16(sb, value);
 154         else
 155                 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
 156 }
 157
 158 static inline void
 159 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
 160 {
 161         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
 162                 return;
 163
 164         /*
 165          * TODO turn this into a table lookup
 166          */
 167         switch (mode & S_IFMT) {
 168         case S_IFSOCK:
 169                 de->d_u.d_44.d_type = DT_SOCK;
 170                 break;
 171         case S_IFLNK:
 172                 de->d_u.d_44.d_type = DT_LNK;
 173                 break;
 174         case S_IFREG:
 175                 de->d_u.d_44.d_type = DT_REG;
 176                 break;
 177         case S_IFBLK:
 178                 de->d_u.d_44.d_type = DT_BLK;
 179                 break;
 180         case S_IFDIR:
 181                 de->d_u.d_44.d_type = DT_DIR;
 182                 break;
 183         case S_IFCHR:
 184                 de->d_u.d_44.d_type = DT_CHR;
 185                 break;
 186         case S_IFIFO:
 187                 de->d_u.d_44.d_type = DT_FIFO;
 188                 break;
 189         default:
 190                 de->d_u.d_44.d_type = DT_UNKNOWN;
 191         }
 192 }
 193
 194 static inline u32
 195 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 196 {
 197         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 198         case UFS_UID_44BSD:
 199                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
 200         case UFS_UID_EFT:
 201                 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 202                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 203                 /* Fall through */
 204         default:
 205                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 206         }
 207 }
 208
 209 static inline void
 210 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 211 {
 212         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 213         case UFS_UID_44BSD:
 214                 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
 215                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 216                 break;
 217         case UFS_UID_EFT:
 218                 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 219                 if (value > 0xFFFF)
 220                         value = 0xFFFF;
 221                 /* Fall through */
 222         default:
 223                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 224                 break;
 225         }
 226 }
 227
 228 static inline u32
 229 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 230 {
 231         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 232         case UFS_UID_44BSD:
 233                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 234         case UFS_UID_EFT:
 235                 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 236                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 237                 /* Fall through */
 238         default:
 239                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 240         }
 241 }
 242
 243 static inline void
 244 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 245 {
 246         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 247         case UFS_UID_44BSD:
 248                 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
 249                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 250                 break;
 251         case UFS_UID_EFT:
 252                 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 253                 if (value > 0xFFFF)
 254                         value = 0xFFFF;
 255                 /* Fall through */
 256         default:
 257                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 258                 break;
 259         }
 260 }
 261
 262 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 263 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 264 extern int __ufs_write_begin(struct file *file, struct address_space *mapping,
 265                 loff_t pos, unsigned len, unsigned flags,
 266                 struct page **pagep, void **fsdata);
 267
 268 /*
 269  * These functions manipulate ufs buffers
 270  */
 271 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
 272 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 273 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 274 extern void ubh_brelse (struct ufs_buffer_head *);
 275 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 276 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 277 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 278 extern void ubh_ll_rw_block(int, struct ufs_buffer_head *);
 279 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
 280 extern void ubh_bforget (struct ufs_buffer_head *);
 281 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 282 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 283 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
 284 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
 285 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 286
 287 /* This functions works with cache pages*/
 288 extern struct page *ufs_get_locked_page(struct address_space *mapping,
 289                                         pgoff_t index);
 290 static inline void ufs_put_locked_page(struct page *page)
 291 {
 292        unlock_page(page);
 293        page_cache_release(page);
 294 }
 295
 296
 297 /*
 298  * macros and inline function to get important structures from ufs_sb_private_info
 299  */
 300
 301 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 302                                    unsigned int offset)
 303 {
 304         unsigned int index;
 305
 306         index = offset >> uspi->s_fshift;
 307         offset &= ~uspi->s_fmask;
 308         return uspi->s_ubh.bh[index]->b_data + offset;
 309 }
 310
 311 #define ubh_get_usb_first(uspi) \
 312         ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 313
 314 #define ubh_get_usb_second(uspi) \
 315         ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 316
 317 #define ubh_get_usb_third(uspi) \
 318         ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 319
 320
 321 #define ubh_get_ucg(ubh) \
 322         ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 323
 324
 325 /*
 326  * Extract byte from ufs_buffer_head
 327  * Extract the bits for a block from a map inside ufs_buffer_head
 328  */
 329 #define ubh_get_addr8(ubh,begin) \
 330         ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 331         ((begin) & ~uspi->s_fmask))
 332
 333 #define ubh_get_addr16(ubh,begin) \
 334         (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 335         ((begin) & ((uspi->fsize>>1) - 1)))
 336
 337 #define ubh_get_addr32(ubh,begin) \
 338         (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 339         ((begin) & ((uspi->s_fsize>>2) - 1)))
 340
 341 #define ubh_get_addr64(ubh,begin) \
 342         (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 343         ((begin) & ((uspi->s_fsize>>3) - 1)))
 344
 345 #define ubh_get_addr ubh_get_addr8
 346
 347 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 348                                      struct ufs_buffer_head *ubh,
 349                                      u64 blk)
 350 {
 351         if (uspi->fs_magic == UFS2_MAGIC)
 352                 return ubh_get_addr64(ubh, blk);
 353         else
 354                 return ubh_get_addr32(ubh, blk);
 355 }
 356
 357 #define ubh_blkmap(ubh,begin,bit) \
 358         ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 359
 360 /*
 361  * Determine the number of available frags given a
 362  * percentage to hold in reserve.
 363  */
 364 static inline u64
 365 ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
 366 {
 367         return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 368                 uspi->cs_total.cs_nffree -
 369                 (uspi->s_dsize * (percentreserved) / 100);
 370 }
 371
 372 /*
 373  * Macros to access cylinder group array structures
 374  */
 375 #define ubh_cg_blktot(ucpi,cylno) \
 376         (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 377
 378 #define ubh_cg_blks(ucpi,cylno,rpos) \
 379         (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 380         (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 381
 382 /*
 383  * Bitmap operations
 384  * These functions work like classical bitmap operations.
 385  * The difference is that we don't have the whole bitmap
 386  * in one contiguous chunk of memory, but in several buffers.
 387  * The parameters of each function are super_block, ufs_buffer_head and
 388  * position of the beginning of the bitmap.
 389  */
 390 #define ubh_setbit(ubh,begin,bit) \
 391         (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 392
 393 #define ubh_clrbit(ubh,begin,bit) \
 394         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 395
 396 #define ubh_isset(ubh,begin,bit) \
 397         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 398
 399 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 400
 401 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 402
 403 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 404 static inline unsigned _ubh_find_next_zero_bit_(
 405         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 406         unsigned begin, unsigned size, unsigned offset)
 407 {
 408         unsigned base, count, pos;
 409
 410         size -= offset;
 411         begin <<= 3;
 412         offset += begin;
 413         base = offset >> uspi->s_bpfshift;
 414         offset &= uspi->s_bpfmask;
 415         for (;;) {
 416                 count = min_t(unsigned int, size + offset, uspi->s_bpf);
 417                 size -= count - offset;
 418                 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
 419                 if (pos < count || !size)
 420                         break;
 421                 base++;
 422                 offset = 0;
 423         }
 424         return (base << uspi->s_bpfshift) + pos - begin;
 425 }
 426
 427 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 428         unsigned size, unsigned offset)
 429 {
 430         unsigned bit, i;
 431         unsigned char * mapp;
 432         unsigned char map;
 433
 434         mapp = bitmap + (size >> 3);
 435         map = *mapp--;
 436         bit = 1 << (size & 7);
 437         for (i = size; i > offset; i--) {
 438                 if ((map & bit) == 0)
 439                         break;
 440                 if ((i & 7) != 0) {
 441                         bit >>= 1;
 442                 } else {
 443                         map = *mapp--;
 444                         bit = 1 << 7;
 445                 }
 446         }
 447         return i;
 448 }
 449
 450 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 451 static inline unsigned _ubh_find_last_zero_bit_(
 452         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 453         unsigned begin, unsigned start, unsigned end)
 454 {
 455         unsigned base, count, pos, size;
 456
 457         size = start - end;
 458         begin <<= 3;
 459         start += begin;
 460         base = start >> uspi->s_bpfshift;
 461         start &= uspi->s_bpfmask;
 462         for (;;) {
 463                 count = min_t(unsigned int,
 464                             size + (uspi->s_bpf - start), uspi->s_bpf)
 465                         - (uspi->s_bpf - start);
 466                 size -= count;
 467                 pos = find_last_zero_bit (ubh->bh[base]->b_data,
 468                         start, start - count);
 469                 if (pos > start - count || !size)
 470                         break;
 471                 base--;
 472                 start = uspi->s_bpf;
 473         }
 474         return (base << uspi->s_bpfshift) + pos - begin;
 475 }
 476
 477 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
 478
 479 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
 480 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
 481         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 482 {
 483         switch (uspi->s_fpb) {
 484         case 8:
 485                 return (*ubh_get_addr (ubh, begin + block) == 0xff);
 486         case 4:
 487                 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
 488         case 2:
 489                 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
 490         case 1:
 491                 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
 492         }
 493         return 0;
 494 }
 495
 496 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
 497 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
 498         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 499 {
 500         switch (uspi->s_fpb) {
 501         case 8:
 502                 *ubh_get_addr (ubh, begin + block) = 0x00;
 503                 return;
 504         case 4:
 505                 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
 506                 return;
 507         case 2:
 508                 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
 509                 return;
 510         case 1:
 511                 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
 512                 return;
 513         }
 514 }
 515
 516 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
 517 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
 518         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 519 {
 520         switch (uspi->s_fpb) {
 521         case 8:
 522                 *ubh_get_addr(ubh, begin + block) = 0xff;
 523                 return;
 524         case 4:
 525                 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
 526                 return;
 527         case 2:
 528                 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
 529                 return;
 530         case 1:
 531                 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
 532                 return;
 533         }
 534 }
 535
 536 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
 537         __fs32 * fraglist, int cnt)
 538 {
 539         struct ufs_sb_private_info * uspi;
 540         unsigned fragsize, pos;
 541
 542         uspi = UFS_SB(sb)->s_uspi;
 543
 544         fragsize = 0;
 545         for (pos = 0; pos < uspi->s_fpb; pos++) {
 546                 if (blockmap & (1 << pos)) {
 547                         fragsize++;
 548                 }
 549                 else if (fragsize > 0) {
 550                         fs32_add(sb, &fraglist[fragsize], cnt);
 551                         fragsize = 0;
 552                 }
 553         }
 554         if (fragsize > 0 && fragsize < uspi->s_fpb)
 555                 fs32_add(sb, &fraglist[fragsize], cnt);
 556 }
 557
 558 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
 559                                             struct ufs_inode_info *ufsi,
 560                                             unsigned blk)
 561 {
 562         BUG_ON(blk > UFS_TIND_BLOCK);
 563         return uspi->fs_magic == UFS2_MAGIC ?
 564                 (void *)&ufsi->i_u1.u2_i_data[blk] :
 565                 (void *)&ufsi->i_u1.i_data[blk];
 566 }
 567
 568 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
 569 {
 570         return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
 571                 fs64_to_cpu(sb, *(__fs64 *)p) :
 572                 fs32_to_cpu(sb, *(__fs32 *)p);
 573 }
 574
 575 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
 576 {
 577         if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
 578                 *(__fs64 *)p = cpu_to_fs64(sb, val);
 579         else
 580                 *(__fs32 *)p = cpu_to_fs32(sb, val);
 581 }
 582
 583 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
 584                                       void *p)
 585 {
 586         if (uspi->fs_magic == UFS2_MAGIC)
 587                 *(__fs64 *)p = 0;
 588         else
 589                 *(__fs32 *)p = 0;
 590 }
 591
 592 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
 593                                        void *p)
 594 {
 595         if (uspi->fs_magic == UFS2_MAGIC)
 596                 return *(__fs64 *)p == 0;
 597         else
 598                 return *(__fs32 *)p == 0;
 599 }