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_SUN:
  42                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
  43         case UFS_ST_SUNx86:
  44                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
  45         case UFS_ST_44BSD:
  46         default:
  47                 return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
  48         }
  49 }
  50
  51 static inline void
  52 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  53                  struct ufs_super_block_third *usb3, s32 value)
  54 {
  55         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  56         case UFS_ST_SUN:
  57                 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
  58                 break;
  59         case UFS_ST_SUNx86:
  60                 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
  61                 break;
  62         case UFS_ST_44BSD:
  63                 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
  64                 break;
  65         }
  66 }
  67
  68 static inline u32
  69 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
  70                   struct ufs_super_block_third *usb3)
  71 {
  72         if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
  73                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
  74         else
  75                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
  76 }
  77
  78 static inline u64
  79 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
  80 {
  81         __fs64 tmp;
  82
  83         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  84         case UFS_ST_SUN:
  85                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
  86                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
  87                 break;
  88         case UFS_ST_SUNx86:
  89                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
  90                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
  91                 break;
  92         case UFS_ST_44BSD:
  93                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
  94                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
  95                 break;
  96         }
  97
  98         return fs64_to_cpu(sb, tmp);
  99 }
 100
 101 static inline u64
 102 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 103 {
 104         __fs64 tmp;
 105
 106         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 107         case UFS_ST_SUN:
 108                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 109                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
 110                 break;
 111         case UFS_ST_SUNx86:
 112                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
 113                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
 114                 break;
 115         case UFS_ST_44BSD:
 116                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
 117                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
 118                 break;
 119         }
 120
 121         return fs64_to_cpu(sb, tmp);
 122 }
 123
 124 static inline u16
 125 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
 126 {
 127         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 128                 return fs16_to_cpu(sb, de->d_u.d_namlen);
 129         else
 130                 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
 131 }
 132
 133 static inline void
 134 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
 135 {
 136         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 137                 de->d_u.d_namlen = cpu_to_fs16(sb, value);
 138         else
 139                 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
 140 }
 141
 142 static inline void
 143 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
 144 {
 145         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
 146                 return;
 147
 148         /*
 149          * TODO turn this into a table lookup
 150          */
 151         switch (mode & S_IFMT) {
 152         case S_IFSOCK:
 153                 de->d_u.d_44.d_type = DT_SOCK;
 154                 break;
 155         case S_IFLNK:
 156                 de->d_u.d_44.d_type = DT_LNK;
 157                 break;
 158         case S_IFREG:
 159                 de->d_u.d_44.d_type = DT_REG;
 160                 break;
 161         case S_IFBLK:
 162                 de->d_u.d_44.d_type = DT_BLK;
 163                 break;
 164         case S_IFDIR:
 165                 de->d_u.d_44.d_type = DT_DIR;
 166                 break;
 167         case S_IFCHR:
 168                 de->d_u.d_44.d_type = DT_CHR;
 169                 break;
 170         case S_IFIFO:
 171                 de->d_u.d_44.d_type = DT_FIFO;
 172                 break;
 173         default:
 174                 de->d_u.d_44.d_type = DT_UNKNOWN;
 175         }
 176 }
 177
 178 static inline u32
 179 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 180 {
 181         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 182         case UFS_UID_EFT:
 183                 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 184         case UFS_UID_44BSD:
 185                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
 186         default:
 187                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 188         }
 189 }
 190
 191 static inline void
 192 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 193 {
 194         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 195         case UFS_UID_EFT:
 196                 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 197                 break;
 198         case UFS_UID_44BSD:
 199                 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
 200                 break;
 201         }
 202         inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 203 }
 204
 205 static inline u32
 206 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 207 {
 208         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 209         case UFS_UID_EFT:
 210                 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 211         case UFS_UID_44BSD:
 212                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 213         default:
 214                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 215         }
 216 }
 217
 218 static inline void
 219 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 220 {
 221         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 222         case UFS_UID_EFT:
 223                 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 224                 break;
 225         case UFS_UID_44BSD:
 226                 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
 227                 break;
 228         }
 229         inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 230 }
 231
 232 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 233 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 234 extern int __ufs_write_begin(struct file *file, struct address_space *mapping,
 235                 loff_t pos, unsigned len, unsigned flags,
 236                 struct page **pagep, void **fsdata);
 237
 238 /*
 239  * These functions manipulate ufs buffers
 240  */
 241 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
 242 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 243 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 244 extern void ubh_brelse (struct ufs_buffer_head *);
 245 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 246 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 247 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 248 extern void ubh_ll_rw_block(int, struct ufs_buffer_head *);
 249 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
 250 extern void ubh_bforget (struct ufs_buffer_head *);
 251 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 252 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 253 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
 254 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
 255 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 256
 257 /* This functions works with cache pages*/
 258 extern struct page *ufs_get_locked_page(struct address_space *mapping,
 259                                         pgoff_t index);
 260 static inline void ufs_put_locked_page(struct page *page)
 261 {
 262        unlock_page(page);
 263        page_cache_release(page);
 264 }
 265
 266
 267 /*
 268  * macros and inline function to get important structures from ufs_sb_private_info
 269  */
 270
 271 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 272                                    unsigned int offset)
 273 {
 274         unsigned int index;
 275
 276         index = offset >> uspi->s_fshift;
 277         offset &= ~uspi->s_fmask;
 278         return uspi->s_ubh.bh[index]->b_data + offset;
 279 }
 280
 281 #define ubh_get_usb_first(uspi) \
 282         ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 283
 284 #define ubh_get_usb_second(uspi) \
 285         ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 286
 287 #define ubh_get_usb_third(uspi) \
 288         ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 289
 290
 291 #define ubh_get_ucg(ubh) \
 292         ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 293
 294
 295 /*
 296  * Extract byte from ufs_buffer_head
 297  * Extract the bits for a block from a map inside ufs_buffer_head
 298  */
 299 #define ubh_get_addr8(ubh,begin) \
 300         ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 301         ((begin) & ~uspi->s_fmask))
 302
 303 #define ubh_get_addr16(ubh,begin) \
 304         (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 305         ((begin) & ((uspi->fsize>>1) - 1)))
 306
 307 #define ubh_get_addr32(ubh,begin) \
 308         (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 309         ((begin) & ((uspi->s_fsize>>2) - 1)))
 310
 311 #define ubh_get_addr64(ubh,begin) \
 312         (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 313         ((begin) & ((uspi->s_fsize>>3) - 1)))
 314
 315 #define ubh_get_addr ubh_get_addr8
 316
 317 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 318                                      struct ufs_buffer_head *ubh,
 319                                      u64 blk)
 320 {
 321         if (uspi->fs_magic == UFS2_MAGIC)
 322                 return ubh_get_addr64(ubh, blk);
 323         else
 324                 return ubh_get_addr32(ubh, blk);
 325 }
 326
 327 #define ubh_blkmap(ubh,begin,bit) \
 328         ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 329
 330 /*
 331  * Determine the number of available frags given a
 332  * percentage to hold in reserve.
 333  */
 334 static inline u64
 335 ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
 336 {
 337         return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 338                 uspi->cs_total.cs_nffree -
 339                 (uspi->s_dsize * (percentreserved) / 100);
 340 }
 341
 342 /*
 343  * Macros to access cylinder group array structures
 344  */
 345 #define ubh_cg_blktot(ucpi,cylno) \
 346         (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 347
 348 #define ubh_cg_blks(ucpi,cylno,rpos) \
 349         (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 350         (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 351
 352 /*
 353  * Bitmap operations
 354  * These functions work like classical bitmap operations.
 355  * The difference is that we don't have the whole bitmap
 356  * in one contiguous chunk of memory, but in several buffers.
 357  * The parameters of each function are super_block, ufs_buffer_head and
 358  * position of the beginning of the bitmap.
 359  */
 360 #define ubh_setbit(ubh,begin,bit) \
 361         (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 362
 363 #define ubh_clrbit(ubh,begin,bit) \
 364         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 365
 366 #define ubh_isset(ubh,begin,bit) \
 367         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 368
 369 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 370
 371 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 372
 373 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 374 static inline unsigned _ubh_find_next_zero_bit_(
 375         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 376         unsigned begin, unsigned size, unsigned offset)
 377 {
 378         unsigned base, count, pos;
 379
 380         size -= offset;
 381         begin <<= 3;
 382         offset += begin;
 383         base = offset >> uspi->s_bpfshift;
 384         offset &= uspi->s_bpfmask;
 385         for (;;) {
 386                 count = min_t(unsigned int, size + offset, uspi->s_bpf);
 387                 size -= count - offset;
 388                 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
 389                 if (pos < count || !size)
 390                         break;
 391                 base++;
 392                 offset = 0;
 393         }
 394         return (base << uspi->s_bpfshift) + pos - begin;
 395 }
 396
 397 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 398         unsigned size, unsigned offset)
 399 {
 400         unsigned bit, i;
 401         unsigned char * mapp;
 402         unsigned char map;
 403
 404         mapp = bitmap + (size >> 3);
 405         map = *mapp--;
 406         bit = 1 << (size & 7);
 407         for (i = size; i > offset; i--) {
 408                 if ((map & bit) == 0)
 409                         break;
 410                 if ((i & 7) != 0) {
 411                         bit >>= 1;
 412                 } else {
 413                         map = *mapp--;
 414                         bit = 1 << 7;
 415                 }
 416         }
 417         return i;
 418 }
 419
 420 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 421 static inline unsigned _ubh_find_last_zero_bit_(
 422         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 423         unsigned begin, unsigned start, unsigned end)
 424 {
 425         unsigned base, count, pos, size;
 426
 427         size = start - end;
 428         begin <<= 3;
 429         start += begin;
 430         base = start >> uspi->s_bpfshift;
 431         start &= uspi->s_bpfmask;
 432         for (;;) {
 433                 count = min_t(unsigned int,
 434                             size + (uspi->s_bpf - start), uspi->s_bpf)
 435                         - (uspi->s_bpf - start);
 436                 size -= count;
 437                 pos = find_last_zero_bit (ubh->bh[base]->b_data,
 438                         start, start - count);
 439                 if (pos > start - count || !size)
 440                         break;
 441                 base--;
 442                 start = uspi->s_bpf;
 443         }
 444         return (base << uspi->s_bpfshift) + pos - begin;
 445 }
 446
 447 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
 448
 449 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
 450 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
 451         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 452 {
 453         switch (uspi->s_fpb) {
 454         case 8:
 455                 return (*ubh_get_addr (ubh, begin + block) == 0xff);
 456         case 4:
 457                 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
 458         case 2:
 459                 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
 460         case 1:
 461                 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
 462         }
 463         return 0;
 464 }
 465
 466 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
 467 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
 468         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 469 {
 470         switch (uspi->s_fpb) {
 471         case 8:
 472                 *ubh_get_addr (ubh, begin + block) = 0x00;
 473                 return;
 474         case 4:
 475                 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
 476                 return;
 477         case 2:
 478                 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
 479                 return;
 480         case 1:
 481                 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
 482                 return;
 483         }
 484 }
 485
 486 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
 487 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
 488         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 489 {
 490         switch (uspi->s_fpb) {
 491         case 8:
 492                 *ubh_get_addr(ubh, begin + block) = 0xff;
 493                 return;
 494         case 4:
 495                 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
 496                 return;
 497         case 2:
 498                 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
 499                 return;
 500         case 1:
 501                 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
 502                 return;
 503         }
 504 }
 505
 506 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
 507         __fs32 * fraglist, int cnt)
 508 {
 509         struct ufs_sb_private_info * uspi;
 510         unsigned fragsize, pos;
 511
 512         uspi = UFS_SB(sb)->s_uspi;
 513
 514         fragsize = 0;
 515         for (pos = 0; pos < uspi->s_fpb; pos++) {
 516                 if (blockmap & (1 << pos)) {
 517                         fragsize++;
 518                 }
 519                 else if (fragsize > 0) {
 520                         fs32_add(sb, &fraglist[fragsize], cnt);
 521                         fragsize = 0;
 522                 }
 523         }
 524         if (fragsize > 0 && fragsize < uspi->s_fpb)
 525                 fs32_add(sb, &fraglist[fragsize], cnt);
 526 }
 527
 528 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
 529                                             struct ufs_inode_info *ufsi,
 530                                             unsigned blk)
 531 {
 532         BUG_ON(blk > UFS_TIND_BLOCK);
 533         return uspi->fs_magic == UFS2_MAGIC ?
 534                 (void *)&ufsi->i_u1.u2_i_data[blk] :
 535                 (void *)&ufsi->i_u1.i_data[blk];
 536 }
 537
 538 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
 539 {
 540         return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
 541                 fs64_to_cpu(sb, *(__fs64 *)p) :
 542                 fs32_to_cpu(sb, *(__fs32 *)p);
 543 }
 544
 545 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
 546 {
 547         if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
 548                 *(__fs64 *)p = cpu_to_fs64(sb, val);
 549         else
 550                 *(__fs32 *)p = cpu_to_fs32(sb, val);
 551 }
 552
 553 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
 554                                       void *p)
 555 {
 556         if (uspi->fs_magic == UFS2_MAGIC)
 557                 *(__fs64 *)p = 0;
 558         else
 559                 *(__fs32 *)p = 0;
 560 }
 561
 562 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
 563                                        void *p)
 564 {
 565         if (uspi->fs_magic == UFS2_MAGIC)
 566                 return *(__fs64 *)p == 0;
 567         else
 568                 return *(__fs32 *)p == 0;
 569 }