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  * functions used for retyping
  16  */
  17 static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
  18 {
  19         return &cpi->c_ubh;
  20 }
  21 static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
  22 {
  23         return &spi->s_ubh;
  24 }
  25
  26
  27
  28 /*
  29  * macros used for accessing structures
  30  */
  31 static inline s32
  32 ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  33                  struct ufs_super_block_third *usb3)
  34 {
  35         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  36         case UFS_ST_SUNOS:
  37                 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
  38                         return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
  39                 fallthrough;    /* to UFS_ST_SUN */
  40         case UFS_ST_SUN:
  41                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
  42         case UFS_ST_SUNx86:
  43                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
  44         case UFS_ST_44BSD:
  45         default:
  46                 return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
  47         }
  48 }
  49
  50 static inline void
  51 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
  52                  struct ufs_super_block_third *usb3, s32 value)
  53 {
  54         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  55         case UFS_ST_SUNOS:
  56                 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
  57                         usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
  58                         break;
  59                 }
  60                 fallthrough;    /* to UFS_ST_SUN */
  61         case UFS_ST_SUN:
  62                 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
  63                 break;
  64         case UFS_ST_SUNx86:
  65                 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
  66                 break;
  67         case UFS_ST_44BSD:
  68                 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
  69                 break;
  70         }
  71 }
  72
  73 static inline u32
  74 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
  75                   struct ufs_super_block_third *usb3)
  76 {
  77         if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
  78                 return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
  79         else
  80                 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
  81 }
  82
  83 static inline u64
  84 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
  85 {
  86         __fs64 tmp;
  87
  88         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
  89         case UFS_ST_SUNOS:
  90         case UFS_ST_SUN:
  91                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
  92                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
  93                 break;
  94         case UFS_ST_SUNx86:
  95                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
  96                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
  97                 break;
  98         case UFS_ST_44BSD:
  99                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
 100                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
 101                 break;
 102         }
 103
 104         return fs64_to_cpu(sb, tmp);
 105 }
 106
 107 static inline u64
 108 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
 109 {
 110         __fs64 tmp;
 111
 112         switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 113         case UFS_ST_SUNOS:
 114         case UFS_ST_SUN:
 115                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
 116                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
 117                 break;
 118         case UFS_ST_SUNx86:
 119                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
 120                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
 121                 break;
 122         case UFS_ST_44BSD:
 123                 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
 124                 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
 125                 break;
 126         }
 127
 128         return fs64_to_cpu(sb, tmp);
 129 }
 130
 131 static inline u16
 132 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
 133 {
 134         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 135                 return fs16_to_cpu(sb, de->d_u.d_namlen);
 136         else
 137                 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
 138 }
 139
 140 static inline void
 141 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
 142 {
 143         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
 144                 de->d_u.d_namlen = cpu_to_fs16(sb, value);
 145         else
 146                 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
 147 }
 148
 149 static inline void
 150 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
 151 {
 152         if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
 153                 return;
 154
 155         /*
 156          * TODO turn this into a table lookup
 157          */
 158         switch (mode & S_IFMT) {
 159         case S_IFSOCK:
 160                 de->d_u.d_44.d_type = DT_SOCK;
 161                 break;
 162         case S_IFLNK:
 163                 de->d_u.d_44.d_type = DT_LNK;
 164                 break;
 165         case S_IFREG:
 166                 de->d_u.d_44.d_type = DT_REG;
 167                 break;
 168         case S_IFBLK:
 169                 de->d_u.d_44.d_type = DT_BLK;
 170                 break;
 171         case S_IFDIR:
 172                 de->d_u.d_44.d_type = DT_DIR;
 173                 break;
 174         case S_IFCHR:
 175                 de->d_u.d_44.d_type = DT_CHR;
 176                 break;
 177         case S_IFIFO:
 178                 de->d_u.d_44.d_type = DT_FIFO;
 179                 break;
 180         default:
 181                 de->d_u.d_44.d_type = DT_UNKNOWN;
 182         }
 183 }
 184
 185 static inline u32
 186 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 187 {
 188         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 189         case UFS_UID_44BSD:
 190                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
 191         case UFS_UID_EFT:
 192                 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 193                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
 194                 fallthrough;
 195         default:
 196                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 197         }
 198 }
 199
 200 static inline void
 201 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 202 {
 203         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 204         case UFS_UID_44BSD:
 205                 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
 206                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 207                 break;
 208         case UFS_UID_EFT:
 209                 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 210                 if (value > 0xFFFF)
 211                         value = 0xFFFF;
 212                 fallthrough;
 213         default:
 214                 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 215                 break;
 216         }
 217 }
 218
 219 static inline u32
 220 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 221 {
 222         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 223         case UFS_UID_44BSD:
 224                 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 225         case UFS_UID_EFT:
 226                 if (inode->ui_u1.oldids.ui_sgid == 0xFFFF)
 227                         return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 228                 fallthrough;
 229         default:
 230                 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 231         }
 232 }
 233
 234 static inline void
 235 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 236 {
 237         switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
 238         case UFS_UID_44BSD:
 239                 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
 240                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 241                 break;
 242         case UFS_UID_EFT:
 243                 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 244                 if (value > 0xFFFF)
 245                         value = 0xFFFF;
 246                 fallthrough;
 247         default:
 248                 inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 249                 break;
 250         }
 251 }
 252
 253 dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 254 void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
 255 int ufs_prepare_chunk(struct folio *folio, loff_t pos, unsigned len);
 256
 257 /*
 258  * These functions manipulate ufs buffers
 259  */
 260 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
 261 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
 262 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
 263 extern void ubh_brelse (struct ufs_buffer_head *);
 264 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 265 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
 266 extern void ubh_sync_block(struct ufs_buffer_head *);
 267 extern void ubh_bforget (struct ufs_buffer_head *);
 268 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
 269
 270 /* This functions works with cache pages*/
 271 struct folio *ufs_get_locked_folio(struct address_space *mapping, pgoff_t index);
 272 static inline void ufs_put_locked_folio(struct folio *folio)
 273 {
 274        folio_unlock(folio);
 275        folio_put(folio);
 276 }
 277
 278 /*
 279  * macros and inline function to get important structures from ufs_sb_private_info
 280  */
 281
 282 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
 283                                    unsigned int offset)
 284 {
 285         unsigned int index;
 286
 287         index = offset >> uspi->s_fshift;
 288         offset &= ~uspi->s_fmask;
 289         return uspi->s_ubh.bh[index]->b_data + offset;
 290 }
 291
 292 #define ubh_get_usb_first(uspi) \
 293         ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
 294
 295 #define ubh_get_usb_second(uspi) \
 296         ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
 297
 298 #define ubh_get_usb_third(uspi) \
 299         ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
 300
 301
 302 #define ubh_get_ucg(ubh) \
 303         ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
 304
 305
 306 /*
 307  * Extract byte from ufs_buffer_head
 308  * Extract the bits for a block from a map inside ufs_buffer_head
 309  */
 310 #define ubh_get_addr8(ubh,begin) \
 311         ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
 312         ((begin) & ~uspi->s_fmask))
 313
 314 #define ubh_get_addr16(ubh,begin) \
 315         (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
 316         ((begin) & ((uspi->fsize>>1) - 1)))
 317
 318 #define ubh_get_addr32(ubh,begin) \
 319         (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
 320         ((begin) & ((uspi->s_fsize>>2) - 1)))
 321
 322 #define ubh_get_addr64(ubh,begin) \
 323         (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
 324         ((begin) & ((uspi->s_fsize>>3) - 1)))
 325
 326 #define ubh_get_addr ubh_get_addr8
 327
 328 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
 329                                      struct ufs_buffer_head *ubh,
 330                                      u64 blk)
 331 {
 332         if (uspi->fs_magic == UFS2_MAGIC)
 333                 return ubh_get_addr64(ubh, blk);
 334         else
 335                 return ubh_get_addr32(ubh, blk);
 336 }
 337
 338 #define ubh_blkmap(ubh,begin,bit) \
 339         ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
 340
 341 static inline u64
 342 ufs_freefrags(struct ufs_sb_private_info *uspi)
 343 {
 344         return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
 345                 uspi->cs_total.cs_nffree;
 346 }
 347
 348 /*
 349  * Macros to access cylinder group array structures
 350  */
 351 #define ubh_cg_blktot(ucpi,cylno) \
 352         (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 353
 354 #define ubh_cg_blks(ucpi,cylno,rpos) \
 355         (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 356         (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 357
 358 /*
 359  * Bitmap operations
 360  * These functions work like classical bitmap operations.
 361  * The difference is that we don't have the whole bitmap
 362  * in one contiguous chunk of memory, but in several buffers.
 363  * The parameters of each function are super_block, ufs_buffer_head and
 364  * position of the beginning of the bitmap.
 365  */
 366 #define ubh_setbit(ubh,begin,bit) \
 367         (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
 368
 369 #define ubh_clrbit(ubh,begin,bit) \
 370         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
 371
 372 #define ubh_isset(ubh,begin,bit) \
 373         (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
 374
 375 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
 376
 377 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
 378
 379 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
 380 static inline unsigned _ubh_find_next_zero_bit_(
 381         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 382         unsigned begin, unsigned size, unsigned offset)
 383 {
 384         unsigned base, count, pos;
 385
 386         size -= offset;
 387         begin <<= 3;
 388         offset += begin;
 389         base = offset >> uspi->s_bpfshift;
 390         offset &= uspi->s_bpfmask;
 391         for (;;) {
 392                 count = min_t(unsigned int, size + offset, uspi->s_bpf);
 393                 size -= count - offset;
 394                 pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
 395                 if (pos < count || !size)
 396                         break;
 397                 base++;
 398                 offset = 0;
 399         }
 400         return (base << uspi->s_bpfshift) + pos - begin;
 401 }
 402
 403 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
 404         unsigned size, unsigned offset)
 405 {
 406         unsigned bit, i;
 407         unsigned char * mapp;
 408         unsigned char map;
 409
 410         mapp = bitmap + (size >> 3);
 411         map = *mapp--;
 412         bit = 1 << (size & 7);
 413         for (i = size; i > offset; i--) {
 414                 if ((map & bit) == 0)
 415                         break;
 416                 if ((i & 7) != 0) {
 417                         bit >>= 1;
 418                 } else {
 419                         map = *mapp--;
 420                         bit = 1 << 7;
 421                 }
 422         }
 423         return i;
 424 }
 425
 426 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
 427 static inline unsigned _ubh_find_last_zero_bit_(
 428         struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
 429         unsigned begin, unsigned start, unsigned end)
 430 {
 431         unsigned base, count, pos, size;
 432
 433         size = start - end;
 434         begin <<= 3;
 435         start += begin;
 436         base = start >> uspi->s_bpfshift;
 437         start &= uspi->s_bpfmask;
 438         for (;;) {
 439                 count = min_t(unsigned int,
 440                             size + (uspi->s_bpf - start), uspi->s_bpf)
 441                         - (uspi->s_bpf - start);
 442                 size -= count;
 443                 pos = find_last_zero_bit (ubh->bh[base]->b_data,
 444                         start, start - count);
 445                 if (pos > start - count || !size)
 446                         break;
 447                 base--;
 448                 start = uspi->s_bpf;
 449         }
 450         return (base << uspi->s_bpfshift) + pos - begin;
 451 }
 452
 453 static inline int ubh_isblockset(struct ufs_sb_private_info *uspi,
 454         struct ufs_cg_private_info *ucpi, unsigned int frag)
 455 {
 456         struct ufs_buffer_head *ubh = UCPI_UBH(ucpi);
 457         u8 *p = ubh_get_addr(ubh, ucpi->c_freeoff + (frag >> 3));
 458         u8 mask;
 459
 460         switch (uspi->s_fpb) {
 461         case 8:
 462                 return *p == 0xff;
 463         case 4:
 464                 mask = 0x0f << (frag & 4);
 465                 return (*p & mask) == mask;
 466         case 2:
 467                 mask = 0x03 << (frag & 6);
 468                 return (*p & mask) == mask;
 469         case 1:
 470                 mask = 0x01 << (frag & 7);
 471                 return (*p & mask) == mask;
 472         }
 473         return 0;
 474 }
 475
 476 static inline void ubh_clrblock(struct ufs_sb_private_info *uspi,
 477         struct ufs_cg_private_info *ucpi, unsigned int frag)
 478 {
 479         struct ufs_buffer_head *ubh = UCPI_UBH(ucpi);
 480         u8 *p = ubh_get_addr(ubh, ucpi->c_freeoff + (frag >> 3));
 481
 482         switch (uspi->s_fpb) {
 483         case 8:
 484                 *p = 0x00;
 485                 return;
 486         case 4:
 487                 *p &= ~(0x0f << (frag & 4));
 488                 return;
 489         case 2:
 490                 *p &= ~(0x03 << (frag & 6));
 491                 return;
 492         case 1:
 493                 *p &= ~(0x01 << (frag & 7));
 494                 return;
 495         }
 496 }
 497
 498 static inline void ubh_setblock(struct ufs_sb_private_info * uspi,
 499         struct ufs_cg_private_info *ucpi, unsigned int frag)
 500 {
 501         struct ufs_buffer_head *ubh = UCPI_UBH(ucpi);
 502         u8 *p = ubh_get_addr(ubh, ucpi->c_freeoff + (frag >> 3));
 503
 504         switch (uspi->s_fpb) {
 505         case 8:
 506                 *p = 0xff;
 507                 return;
 508         case 4:
 509                 *p |= 0x0f << (frag & 4);
 510                 return;
 511         case 2:
 512                 *p |= 0x03 << (frag & 6);
 513                 return;
 514         case 1:
 515                 *p |= 0x01 << (frag & 7);
 516                 return;
 517         }
 518 }
 519
 520 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
 521         __fs32 * fraglist, int cnt)
 522 {
 523         struct ufs_sb_private_info * uspi;
 524         unsigned fragsize, pos;
 525
 526         uspi = UFS_SB(sb)->s_uspi;
 527
 528         fragsize = 0;
 529         for (pos = 0; pos < uspi->s_fpb; pos++) {
 530                 if (blockmap & (1 << pos)) {
 531                         fragsize++;
 532                 }
 533                 else if (fragsize > 0) {
 534                         fs32_add(sb, &fraglist[fragsize], cnt);
 535                         fragsize = 0;
 536                 }
 537         }
 538         if (fragsize > 0 && fragsize < uspi->s_fpb)
 539                 fs32_add(sb, &fraglist[fragsize], cnt);
 540 }
 541
 542 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
 543                                             struct ufs_inode_info *ufsi,
 544                                             unsigned blk)
 545 {
 546         BUG_ON(blk > UFS_TIND_BLOCK);
 547         return uspi->fs_magic == UFS2_MAGIC ?
 548                 (void *)&ufsi->i_u1.u2_i_data[blk] :
 549                 (void *)&ufsi->i_u1.i_data[blk];
 550 }
 551
 552 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
 553 {
 554         return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
 555                 fs64_to_cpu(sb, *(__fs64 *)p) :
 556                 fs32_to_cpu(sb, *(__fs32 *)p);
 557 }
 558
 559 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
 560 {
 561         if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
 562                 *(__fs64 *)p = cpu_to_fs64(sb, val);
 563         else
 564                 *(__fs32 *)p = cpu_to_fs32(sb, val);
 565 }
 566
 567 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
 568                                       void *p)
 569 {
 570         if (uspi->fs_magic == UFS2_MAGIC)
 571                 *(__fs64 *)p = 0;
 572         else
 573                 *(__fs32 *)p = 0;
 574 }
 575
 576 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
 577                                        void *p)
 578 {
 579         if (uspi->fs_magic == UFS2_MAGIC)
 580                 return *(__fs64 *)p == 0;
 581         else
 582                 return *(__fs32 *)p == 0;
 583 }
 584
 585 static inline __fs32 ufs_get_seconds(struct super_block *sbp)
 586 {
 587         time64_t now = ktime_get_real_seconds();
 588
 589         /* Signed 32-bit interpretation wraps around in 2038, which
 590          * happens in ufs1 inode stamps but not ufs2 using 64-bits
 591          * stamps. For superblock and blockgroup, let's assume
 592          * unsigned 32-bit stamps, which are good until y2106.
 593          * Wrap around rather than clamp here to make the dirty
 594          * file system detection work in the superblock stamp.
 595          */
 596         return cpu_to_fs32(sbp, lower_32_bits(now));
 597 }