fs/ufs/util.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  linux/fs/ufs/util.h
   4  *
   5  * Copyright (C) 1998
   6  * Daniel Pirkl <daniel.pirkl@email.cz>
   7  * Charles University, Faculty of Mathematics and Physics
   8  */
   9
  10 #include <linux/buffer_head.h>
  11 #include <linux/fs.h>
  12 #include "swab.h"
  13
  14
  15 /*
  16  * some useful macros
  17  */
  18 #define in_range(b,first,len)   ((b)>=(first)&&(b)<(first)+(len))
  19
  20 /*
  21  * functions used for retyping
  22  */
  23 static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
  24 {
  25         return &cpi->c_ubh;
  26 }
  27 static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
  28 {
  29         return &spi->s_ubh;
  30 }
  31
  32
  33
  34 /*
  35  * macros used for accessing structures
  36  */
  37 static inline s32
  38 ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  39                  struct ufs_super_block_third *usb3)
  40 {
  41         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  42         case UFS_ST_SUNOS:
  43                 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
  44                         return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
  45                 /* Fall Through to UFS_ST_SUN */
  46         case UFS_ST_SUN:
  47                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
  48         case UFS_ST_SUNx86:
  49                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
  50         case UFS_ST_44BSD:
  51         default:
  52                 return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
  53         }
  54 }
  55
  56 static inline void
  57 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  58                  struct ufs_super_block_third *usb3, s32 value)
  59 {
  60         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  61         case UFS_ST_SUNOS:
  62                 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
  63                         usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
  64                         break;
  65                 }
  66                 /* Fall Through to UFS_ST_SUN */
  67         case UFS_ST_SUN:
  68                 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
  69                 break;
  70         case UFS_ST_SUNx86:
  71                 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
  72                 break;
  73         case UFS_ST_44BSD:
  74                 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
  75                 break;
  76         }
  77 }
  78
  79 static inline u32
  80 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
  81                   struct ufs_super_block_third *usb3)
  82 {
  83         if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
  84                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
  85         else
  86                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
  87 }
  88
  89 static inline u64
  90 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
  91 {
  92         __fs64 tmp;
  93
  94         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  95         case UFS_ST_SUNOS:
  96         case UFS_ST_SUN:
  97                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
  98                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
  99                 break;
 100         case UFS_ST_SUNx86:
 101                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
 102                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
 103                 break;
 104         case UFS_ST_44BSD:
 105                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
 106                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
 107                 break;
 108         }
 109
 110         return fs64_to_cpu(sb, tmp);
 111 }
 112
 113 static inline u64
 114 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 115 {
 116         __fs64 tmp;
 117
 118         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 119         case UFS_ST_SUNOS:
 120         case UFS_ST_SUN:
 121                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 122                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
 123                 break;
 124         case UFS_ST_SUNx86:
 125                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
 126                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
 127                 break;
 128         case UFS_ST_44BSD:
 129                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
 130                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
 131                 break;
 132         }
 133
 134         return fs64_to_cpu(sb, tmp);
 135 }
 136
 137 static inline u16
 138 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
 139 {
 140         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 141                 return fs16_to_cpu(sb, de->d_u.d_namlen);
 142         else
 143                 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
 144 }
 145
 146 static inline void
 147 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
 148 {
 149         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 150                 de->d_u.d_namlen = cpu_to_fs16(sb, value);
 151         else
 152                 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
 153 }
 154
 155 static inline void
 156 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
 157 {
 158         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
 159                 return;
 160
 161         /*
 162          * TODO turn this into a table lookup
 163          */
 164         switch (mode & S_IFMT) {
 165         case S_IFSOCK:
 166                 de->d_u.d_44.d_type = DT_SOCK;
 167                 break;
 168         case S_IFLNK:
 169                 de->d_u.d_44.d_type = DT_LNK;
 170                 break;
 171         case S_IFREG:
 172                 de->d_u.d_44.d_type = DT_REG;
 173                 break;
 174         case S_IFBLK:
 175                 de->d_u.d_44.d_type = DT_BLK;
 176                 break;
 177         case S_IFDIR:
 178                 de->d_u.d_44.d_type = DT_DIR;
 179                 break;
 180         case S_IFCHR:
 181                 de->d_u.d_44.d_type = DT_CHR;
 182                 break;
 183         case S_IFIFO:
 184                 de->d_u.d_44.d_type = DT_FIFO;
 185                 break;
 186         default:
 187                 de->d_u.d_44.d_type = DT_UNKNOWN;
 188         }
 189 }
 190
 191 static inline u32
 192 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 193 {
 194         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 195         case UFS_UID_44BSD:
 196                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
 197         case UFS_UID_EFT:
 198                 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 199                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 200                 /* Fall through */
 201         default:
 202                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 203         }
 204 }
 205
 206 static inline void
 207 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 208 {
 209         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 210         case UFS_UID_44BSD:
 211                 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
 212                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 213                 break;
 214         case UFS_UID_EFT:
 215                 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 216                 if (value > 0xFFFF)
 217                         value = 0xFFFF;
 218                 /* Fall through */
 219         default:
 220                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 221                 break;
 222         }
 223 }
 224
 225 static inline u32
 226 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 227 {
 228         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 229         case UFS_UID_44BSD:
 230                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 231         case UFS_UID_EFT:
 232                 if (inode->ui_u1.oldids.ui_sgid == 0xFFFF)
 233                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 234                 /* Fall through */
 235         default:
 236                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 237         }
 238 }
 239
 240 static inline void
 241 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 242 {
 243         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 244         case UFS_UID_44BSD:
 245                 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
 246                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 247                 break;
 248         case UFS_UID_EFT:
 249                 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 250                 if (value > 0xFFFF)
 251                         value = 0xFFFF;
 252                 /* Fall through */
 253         default:
 254                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 255                 break;
 256         }
 257 }
 258
 259 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 260 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 261 extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
 262
 263 /*
 264  * These functions manipulate ufs buffers
 265  */
 266 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
 267 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 268 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 269 extern void ubh_brelse (struct ufs_buffer_head *);
 270 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 271 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 272 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 273 extern void ubh_sync_block(struct ufs_buffer_head *);
 274 extern void ubh_bforget (struct ufs_buffer_head *);
 275 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 276 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
 277 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
 278 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
 279 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 280
 281 /* This functions works with cache pages*/
 282 extern struct page *ufs_get_locked_page(struct address_space *mapping,
 283                                         pgoff_t index);
 284 static inline void ufs_put_locked_page(struct page *page)
 285 {
 286        unlock_page(page);
 287        put_page(page);
 288 }
 289
 290
 291 /*
 292  * macros and inline function to get important structures from ufs_sb_private_info
 293  */
 294
 295 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 296                                    unsigned int offset)
 297 {
 298         unsigned int index;
 299
 300         index = offset >> uspi->s_fshift;
 301         offset &= ~uspi->s_fmask;
 302         return uspi->s_ubh.bh[index]->b_data + offset;
 303 }
 304
 305 #define ubh_get_usb_first(uspi) \
 306         ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 307
 308 #define ubh_get_usb_second(uspi) \
 309         ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 310
 311 #define ubh_get_usb_third(uspi) \
 312         ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 313
 314
 315 #define ubh_get_ucg(ubh) \
 316         ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 317
 318
 319 /*
 320  * Extract byte from ufs_buffer_head
 321  * Extract the bits for a block from a map inside ufs_buffer_head
 322  */
 323 #define ubh_get_addr8(ubh,begin) \
 324         ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 325         ((begin) & ~uspi->s_fmask))
 326
 327 #define ubh_get_addr16(ubh,begin) \
 328         (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 329         ((begin) & ((uspi->fsize>>1) - 1)))
 330
 331 #define ubh_get_addr32(ubh,begin) \
 332         (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 333         ((begin) & ((uspi->s_fsize>>2) - 1)))
 334
 335 #define ubh_get_addr64(ubh,begin) \
 336         (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 337         ((begin) & ((uspi->s_fsize>>3) - 1)))
 338
 339 #define ubh_get_addr ubh_get_addr8
 340
 341 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 342                                      struct ufs_buffer_head *ubh,
 343                                      u64 blk)
 344 {
 345         if (uspi->fs_magic == UFS2_MAGIC)
 346                 return ubh_get_addr64(ubh, blk);
 347         else
 348                 return ubh_get_addr32(ubh, blk);
 349 }
 350
 351 #define ubh_blkmap(ubh,begin,bit) \
 352         ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 353
 354 static inline u64
 355 ufs_freefrags(struct ufs_sb_private_info *uspi)
 356 {
 357         return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 358                 uspi->cs_total.cs_nffree;
 359 }
 360
 361 /*
 362  * Macros to access cylinder group array structures
 363  */
 364 #define ubh_cg_blktot(ucpi,cylno) \
 365         (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 366
 367 #define ubh_cg_blks(ucpi,cylno,rpos) \
 368         (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 369         (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 370
 371 /*
 372  * Bitmap operations
 373  * These functions work like classical bitmap operations.
 374  * The difference is that we don't have the whole bitmap
 375  * in one contiguous chunk of memory, but in several buffers.
 376  * The parameters of each function are super_block, ufs_buffer_head and
 377  * position of the beginning of the bitmap.
 378  */
 379 #define ubh_setbit(ubh,begin,bit) \
 380         (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 381
 382 #define ubh_clrbit(ubh,begin,bit) \
 383         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 384
 385 #define ubh_isset(ubh,begin,bit) \
 386         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 387
 388 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 389
 390 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 391
 392 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 393 static inline unsigned _ubh_find_next_zero_bit_(
 394         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 395         unsigned begin, unsigned size, unsigned offset)
 396 {
 397         unsigned base, count, pos;
 398
 399         size -= offset;
 400         begin <<= 3;
 401         offset += begin;
 402         base = offset >> uspi->s_bpfshift;
 403         offset &= uspi->s_bpfmask;
 404         for (;;) {
 405                 count = min_t(unsigned int, size + offset, uspi->s_bpf);
 406                 size -= count - offset;
 407                 pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
 408                 if (pos < count || !size)
 409                         break;
 410                 base++;
 411                 offset = 0;
 412         }
 413         return (base << uspi->s_bpfshift) + pos - begin;
 414 }
 415
 416 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 417         unsigned size, unsigned offset)
 418 {
 419         unsigned bit, i;
 420         unsigned char * mapp;
 421         unsigned char map;
 422
 423         mapp = bitmap + (size >> 3);
 424         map = *mapp--;
 425         bit = 1 << (size & 7);
 426         for (i = size; i > offset; i--) {
 427                 if ((map & bit) == 0)
 428                         break;
 429                 if ((i & 7) != 0) {
 430                         bit >>= 1;
 431                 } else {
 432                         map = *mapp--;
 433                         bit = 1 << 7;
 434                 }
 435         }
 436         return i;
 437 }
 438
 439 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 440 static inline unsigned _ubh_find_last_zero_bit_(
 441         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 442         unsigned begin, unsigned start, unsigned end)
 443 {
 444         unsigned base, count, pos, size;
 445
 446         size = start - end;
 447         begin <<= 3;
 448         start += begin;
 449         base = start >> uspi->s_bpfshift;
 450         start &= uspi->s_bpfmask;
 451         for (;;) {
 452                 count = min_t(unsigned int,
 453                             size + (uspi->s_bpf - start), uspi->s_bpf)
 454                         - (uspi->s_bpf - start);
 455                 size -= count;
 456                 pos = find_last_zero_bit (ubh->bh[base]->b_data,
 457                         start, start - count);
 458                 if (pos > start - count || !size)
 459                         break;
 460                 base--;
 461                 start = uspi->s_bpf;
 462         }
 463         return (base << uspi->s_bpfshift) + pos - begin;
 464 }
 465
 466 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
 467
 468 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
 469 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
 470         struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
 471 {
 472         u8 mask;
 473         switch (uspi->s_fpb) {
 474         case 8:
 475                 return (*ubh_get_addr (ubh, begin + block) == 0xff);
 476         case 4:
 477                 mask = 0x0f << ((block & 0x01) << 2);
 478                 return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask;
 479         case 2:
 480                 mask = 0x03 << ((block & 0x03) << 1);
 481                 return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask;
 482         case 1:
 483                 mask = 0x01 << (block & 0x07);
 484                 return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask;
 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 }
 593
 594 static inline __fs32 ufs_get_seconds(struct super_block *sbp)
 595 {
 596         time64_t now = ktime_get_real_seconds();
 597
 598         /* Signed 32-bit interpretation wraps around in 2038, which
 599          * happens in ufs1 inode stamps but not ufs2 using 64-bits
 600          * stamps. For superblock and blockgroup, let's assume
 601          * unsigned 32-bit stamps, which are good until y2106.
 602          * Wrap around rather than clamp here to make the dirty
 603          * file system detection work in the superblock stamp.
 604          */
 605         return cpu_to_fs32(sbp, lower_32_bits(now));
 606 }