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 fallthrough; /* 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 fallthrough; /* 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 fallthrough; 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 fallthrough; 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 fallthrough; 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 fallthrough; 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 } 607