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_write_begin(struct file *file, struct address_space *mapping,
 261                 loff_t pos, unsigned len, unsigned flags,
 262                 struct page **pagep, void **fsdata);
 263
 264 /*
 265  * These functions manipulate ufs buffers
 266  */
 267 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
 268 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 269 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 270 extern void ubh_brelse (struct ufs_buffer_head *);
 271 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 272 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 273 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 274 extern void ubh_ll_rw_block(int, struct ufs_buffer_head *);
 275 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
 276 extern void ubh_bforget (struct ufs_buffer_head *);
 277 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 278 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 279 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
 280 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
 281 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 282
 283 /* This functions works with cache pages*/
 284 extern struct page *ufs_get_locked_page(struct address_space *mapping,
 285                                         pgoff_t index);
 286 static inline void ufs_put_locked_page(struct page *page)
 287 {
 288        unlock_page(page);
 289        page_cache_release(page);
 290 }
 291
 292
 293 /*
 294  * macros and inline function to get important structures from ufs_sb_private_info
 295  */
 296
 297 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 298                                    unsigned int offset)
 299 {
 300         unsigned int index;
 301
 302         index = offset >> uspi->s_fshift;
 303         offset &= ~uspi->s_fmask;
 304         return uspi->s_ubh.bh[index]->b_data + offset;
 305 }
 306
 307 #define ubh_get_usb_first(uspi) \
 308         ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 309
 310 #define ubh_get_usb_second(uspi) \
 311         ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 312
 313 #define ubh_get_usb_third(uspi) \
 314         ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 315
 316
 317 #define ubh_get_ucg(ubh) \
 318         ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 319
 320
 321 /*
 322  * Extract byte from ufs_buffer_head
 323  * Extract the bits for a block from a map inside ufs_buffer_head
 324  */
 325 #define ubh_get_addr8(ubh,begin) \
 326         ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 327         ((begin) & ~uspi->s_fmask))
 328
 329 #define ubh_get_addr16(ubh,begin) \
 330         (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 331         ((begin) & ((uspi->fsize>>1) - 1)))
 332
 333 #define ubh_get_addr32(ubh,begin) \
 334         (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 335         ((begin) & ((uspi->s_fsize>>2) - 1)))
 336
 337 #define ubh_get_addr64(ubh,begin) \
 338         (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 339         ((begin) & ((uspi->s_fsize>>3) - 1)))
 340
 341 #define ubh_get_addr ubh_get_addr8
 342
 343 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 344                                      struct ufs_buffer_head *ubh,
 345                                      u64 blk)
 346 {
 347         if (uspi->fs_magic == UFS2_MAGIC)
 348                 return ubh_get_addr64(ubh, blk);
 349         else
 350                 return ubh_get_addr32(ubh, blk);
 351 }
 352
 353 #define ubh_blkmap(ubh,begin,bit) \
 354         ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 355
 356 /*
 357  * Determine the number of available frags given a
 358  * percentage to hold in reserve.
 359  */
 360 static inline u64
 361 ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
 362 {
 363         return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 364                 uspi->cs_total.cs_nffree -
 365                 (uspi->s_dsize * (percentreserved) / 100);
 366 }
 367
 368 /*
 369  * Macros to access cylinder group array structures
 370  */
 371 #define ubh_cg_blktot(ucpi,cylno) \
 372         (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 373
 374 #define ubh_cg_blks(ucpi,cylno,rpos) \
 375         (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 376         (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 377
 378 /*
 379  * Bitmap operations
 380  * These functions work like classical bitmap operations.
 381  * The difference is that we don't have the whole bitmap
 382  * in one contiguous chunk of memory, but in several buffers.
 383  * The parameters of each function are super_block, ufs_buffer_head and
 384  * position of the beginning of the bitmap.
 385  */
 386 #define ubh_setbit(ubh,begin,bit) \
 387         (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 388
 389 #define ubh_clrbit(ubh,begin,bit) \
 390         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 391
 392 #define ubh_isset(ubh,begin,bit) \
 393         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 394
 395 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 396
 397 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 398
 399 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 400 static inline unsigned _ubh_find_next_zero_bit_(
 401         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 402         unsigned begin, unsigned size, unsigned offset)
 403 {
 404         unsigned base, count, pos;
 405
 406         size -= offset;
 407         begin <<= 3;
 408         offset += begin;
 409         base = offset >> uspi->s_bpfshift;
 410         offset &= uspi->s_bpfmask;
 411         for (;;) {
 412                 count = min_t(unsigned int, size + offset, uspi->s_bpf);
 413                 size -= count - offset;
 414                 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
 415                 if (pos < count || !size)
 416                         break;
 417                 base++;
 418                 offset = 0;
 419         }
 420         return (base << uspi->s_bpfshift) + pos - begin;
 421 }
 422
 423 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 424         unsigned size, unsigned offset)
 425 {
 426         unsigned bit, i;
 427         unsigned char * mapp;
 428         unsigned char map;
 429
 430         mapp = bitmap + (size >> 3);
 431         map = *mapp--;
 432         bit = 1 << (size & 7);
 433         for (i = size; i > offset; i--) {
 434                 if ((map & bit) == 0)
 435                         break;
 436                 if ((i & 7) != 0) {
 437                         bit >>= 1;
 438                 } else {
 439                         map = *mapp--;
 440                         bit = 1 << 7;
 441                 }
 442         }
 443         return i;
 444 }
 445
 446 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 447 static inline unsigned _ubh_find_last_zero_bit_(
 448         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 449         unsigned begin, unsigned start, unsigned end)
 450 {
 451         unsigned base, count, pos, size;
 452
 453         size = start - end;
 454         begin <<= 3;
 455         start += begin;
 456         base = start >> uspi->s_bpfshift;
 457         start &= uspi->s_bpfmask;
 458         for (;;) {
 459                 count = min_t(unsigned int,
 460                             size + (uspi->s_bpf - start), uspi->s_bpf)
 461                         - (uspi->s_bpf - start);
 462                 size -= count;
 463                 pos = find_last_zero_bit (ubh->bh[base]->b_data,
 464                         start, start - count);
 465                 if (pos > start - count || !size)
 466                         break;
 467                 base--;
 468                 start = uspi->s_bpf;
 469         }
 470         return (base << uspi->s_bpfshift) + pos - begin;
 471 }
 472
 473 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
 474
 475 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
 476 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
 477         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 478 {
 479         switch (uspi->s_fpb) {
 480         case 8:
 481                 return (*ubh_get_addr (ubh, begin + block) == 0xff);
 482         case 4:
 483                 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
 484         case 2:
 485                 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
 486         case 1:
 487                 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
 488         }
 489         return 0;
 490 }
 491
 492 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
 493 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
 494         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 495 {
 496         switch (uspi->s_fpb) {
 497         case 8:
 498                 *ubh_get_addr (ubh, begin + block) = 0x00;
 499                 return;
 500         case 4:
 501                 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
 502                 return;
 503         case 2:
 504                 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
 505                 return;
 506         case 1:
 507                 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
 508                 return;
 509         }
 510 }
 511
 512 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
 513 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
 514         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 515 {
 516         switch (uspi->s_fpb) {
 517         case 8:
 518                 *ubh_get_addr(ubh, begin + block) = 0xff;
 519                 return;
 520         case 4:
 521                 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
 522                 return;
 523         case 2:
 524                 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
 525                 return;
 526         case 1:
 527                 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
 528                 return;
 529         }
 530 }
 531
 532 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
 533         __fs32 * fraglist, int cnt)
 534 {
 535         struct ufs_sb_private_info * uspi;
 536         unsigned fragsize, pos;
 537
 538         uspi = UFS_SB(sb)->s_uspi;
 539
 540         fragsize = 0;
 541         for (pos = 0; pos < uspi->s_fpb; pos++) {
 542                 if (blockmap & (1 << pos)) {
 543                         fragsize++;
 544                 }
 545                 else if (fragsize > 0) {
 546                         fs32_add(sb, &fraglist[fragsize], cnt);
 547                         fragsize = 0;
 548                 }
 549         }
 550         if (fragsize > 0 && fragsize < uspi->s_fpb)
 551                 fs32_add(sb, &fraglist[fragsize], cnt);
 552 }
 553
 554 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
 555                                             struct ufs_inode_info *ufsi,
 556                                             unsigned blk)
 557 {
 558         BUG_ON(blk > UFS_TIND_BLOCK);
 559         return uspi->fs_magic == UFS2_MAGIC ?
 560                 (void *)&ufsi->i_u1.u2_i_data[blk] :
 561                 (void *)&ufsi->i_u1.i_data[blk];
 562 }
 563
 564 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
 565 {
 566         return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
 567                 fs64_to_cpu(sb, *(__fs64 *)p) :
 568                 fs32_to_cpu(sb, *(__fs32 *)p);
 569 }
 570
 571 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
 572 {
 573         if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
 574                 *(__fs64 *)p = cpu_to_fs64(sb, val);
 575         else
 576                 *(__fs32 *)p = cpu_to_fs32(sb, val);
 577 }
 578
 579 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
 580                                       void *p)
 581 {
 582         if (uspi->fs_magic == UFS2_MAGIC)
 583                 *(__fs64 *)p = 0;
 584         else
 585                 *(__fs32 *)p = 0;
 586 }
 587
 588 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
 589                                        void *p)
 590 {
 591         if (uspi->fs_magic == UFS2_MAGIC)
 592                 return *(__fs64 *)p == 0;
 593         else
 594                 return *(__fs32 *)p == 0;
 595 }