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 */ 17static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi) 18{ 19 return &cpi->c_ubh; 20} 21static 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 */ 31static inline s32 32ufs_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 50static inline void 51ufs_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 73static inline u32 74ufs_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 83static inline u64 84ufs_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 107static inline u64 108ufs_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 131static inline u16 132ufs_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 140static inline void 141ufs_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 149static inline void 150ufs_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 185static inline u32 186ufs_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 200static inline void 201ufs_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 219static inline u32 220ufs_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 234static inline void 235ufs_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 253extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *); 254extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t); 255extern int ufs_prepare_chunk(struct page *page, 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) 261extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64); 262extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64); 263extern void ubh_brelse (struct ufs_buffer_head *); 264extern void ubh_brelse_uspi (struct ufs_sb_private_info *); 265extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *); 266extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int); 267extern void ubh_sync_block(struct ufs_buffer_head *); 268extern void ubh_bforget (struct ufs_buffer_head *); 269extern int ubh_buffer_dirty (struct ufs_buffer_head *); 270#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size) 271extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned); 272#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size) 273extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned); 274 275/* This functions works with cache pages*/ 276extern struct page *ufs_get_locked_page(struct address_space *mapping, 277 pgoff_t index); 278static inline void ufs_put_locked_page(struct page *page) 279{ 280 unlock_page(page); 281 put_page(page); 282} 283 284 285/* 286 * macros and inline function to get important structures from ufs_sb_private_info 287 */ 288 289static inline void *get_usb_offset(struct ufs_sb_private_info *uspi, 290 unsigned int offset) 291{ 292 unsigned int index; 293 294 index = offset >> uspi->s_fshift; 295 offset &= ~uspi->s_fmask; 296 return uspi->s_ubh.bh[index]->b_data + offset; 297} 298 299#define ubh_get_usb_first(uspi) \ 300 ((struct ufs_super_block_first *)get_usb_offset((uspi), 0)) 301 302#define ubh_get_usb_second(uspi) \ 303 ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE)) 304 305#define ubh_get_usb_third(uspi) \ 306 ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE)) 307 308 309#define ubh_get_ucg(ubh) \ 310 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data)) 311 312 313/* 314 * Extract byte from ufs_buffer_head 315 * Extract the bits for a block from a map inside ufs_buffer_head 316 */ 317#define ubh_get_addr8(ubh,begin) \ 318 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \ 319 ((begin) & ~uspi->s_fmask)) 320 321#define ubh_get_addr16(ubh,begin) \ 322 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \ 323 ((begin) & ((uspi->fsize>>1) - 1))) 324 325#define ubh_get_addr32(ubh,begin) \ 326 (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \ 327 ((begin) & ((uspi->s_fsize>>2) - 1))) 328 329#define ubh_get_addr64(ubh,begin) \ 330 (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \ 331 ((begin) & ((uspi->s_fsize>>3) - 1))) 332 333#define ubh_get_addr ubh_get_addr8 334 335static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi, 336 struct ufs_buffer_head *ubh, 337 u64 blk) 338{ 339 if (uspi->fs_magic == UFS2_MAGIC) 340 return ubh_get_addr64(ubh, blk); 341 else 342 return ubh_get_addr32(ubh, blk); 343} 344 345#define ubh_blkmap(ubh,begin,bit) \ 346 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb))) 347 348static inline u64 349ufs_freefrags(struct ufs_sb_private_info *uspi) 350{ 351 return ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 352 uspi->cs_total.cs_nffree; 353} 354 355/* 356 * Macros to access cylinder group array structures 357 */ 358#define ubh_cg_blktot(ucpi,cylno) \ 359 (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2)))) 360 361#define ubh_cg_blks(ucpi,cylno,rpos) \ 362 (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \ 363 (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 )))) 364 365/* 366 * Bitmap operations 367 * These functions work like classical bitmap operations. 368 * The difference is that we don't have the whole bitmap 369 * in one contiguous chunk of memory, but in several buffers. 370 * The parameters of each function are super_block, ufs_buffer_head and 371 * position of the beginning of the bitmap. 372 */ 373#define ubh_setbit(ubh,begin,bit) \ 374 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7))) 375 376#define ubh_clrbit(ubh,begin,bit) \ 377 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7))) 378 379#define ubh_isset(ubh,begin,bit) \ 380 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7))) 381 382#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit)) 383 384#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0) 385 386#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset) 387static inline unsigned _ubh_find_next_zero_bit_( 388 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, 389 unsigned begin, unsigned size, unsigned offset) 390{ 391 unsigned base, count, pos; 392 393 size -= offset; 394 begin <<= 3; 395 offset += begin; 396 base = offset >> uspi->s_bpfshift; 397 offset &= uspi->s_bpfmask; 398 for (;;) { 399 count = min_t(unsigned int, size + offset, uspi->s_bpf); 400 size -= count - offset; 401 pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset); 402 if (pos < count || !size) 403 break; 404 base++; 405 offset = 0; 406 } 407 return (base << uspi->s_bpfshift) + pos - begin; 408} 409 410static inline unsigned find_last_zero_bit (unsigned char * bitmap, 411 unsigned size, unsigned offset) 412{ 413 unsigned bit, i; 414 unsigned char * mapp; 415 unsigned char map; 416 417 mapp = bitmap + (size >> 3); 418 map = *mapp--; 419 bit = 1 << (size & 7); 420 for (i = size; i > offset; i--) { 421 if ((map & bit) == 0) 422 break; 423 if ((i & 7) != 0) { 424 bit >>= 1; 425 } else { 426 map = *mapp--; 427 bit = 1 << 7; 428 } 429 } 430 return i; 431} 432 433#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset) 434static inline unsigned _ubh_find_last_zero_bit_( 435 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, 436 unsigned begin, unsigned start, unsigned end) 437{ 438 unsigned base, count, pos, size; 439 440 size = start - end; 441 begin <<= 3; 442 start += begin; 443 base = start >> uspi->s_bpfshift; 444 start &= uspi->s_bpfmask; 445 for (;;) { 446 count = min_t(unsigned int, 447 size + (uspi->s_bpf - start), uspi->s_bpf) 448 - (uspi->s_bpf - start); 449 size -= count; 450 pos = find_last_zero_bit (ubh->bh[base]->b_data, 451 start, start - count); 452 if (pos > start - count || !size) 453 break; 454 base--; 455 start = uspi->s_bpf; 456 } 457 return (base << uspi->s_bpfshift) + pos - begin; 458} 459 460#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block)) 461 462#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block) 463static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi, 464 struct ufs_buffer_head * ubh, unsigned begin, unsigned block) 465{ 466 u8 mask; 467 switch (uspi->s_fpb) { 468 case 8: 469 return (*ubh_get_addr (ubh, begin + block) == 0xff); 470 case 4: 471 mask = 0x0f << ((block & 0x01) << 2); 472 return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask; 473 case 2: 474 mask = 0x03 << ((block & 0x03) << 1); 475 return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask; 476 case 1: 477 mask = 0x01 << (block & 0x07); 478 return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask; 479 } 480 return 0; 481} 482 483#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block) 484static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi, 485 struct ufs_buffer_head * ubh, unsigned begin, unsigned block) 486{ 487 switch (uspi->s_fpb) { 488 case 8: 489 *ubh_get_addr (ubh, begin + block) = 0x00; 490 return; 491 case 4: 492 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2)); 493 return; 494 case 2: 495 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1)); 496 return; 497 case 1: 498 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07))); 499 return; 500 } 501} 502 503#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block) 504static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi, 505 struct ufs_buffer_head * ubh, unsigned begin, unsigned block) 506{ 507 switch (uspi->s_fpb) { 508 case 8: 509 *ubh_get_addr(ubh, begin + block) = 0xff; 510 return; 511 case 4: 512 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2)); 513 return; 514 case 2: 515 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1)); 516 return; 517 case 1: 518 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07))); 519 return; 520 } 521} 522 523static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap, 524 __fs32 * fraglist, int cnt) 525{ 526 struct ufs_sb_private_info * uspi; 527 unsigned fragsize, pos; 528 529 uspi = UFS_SB(sb)->s_uspi; 530 531 fragsize = 0; 532 for (pos = 0; pos < uspi->s_fpb; pos++) { 533 if (blockmap & (1 << pos)) { 534 fragsize++; 535 } 536 else if (fragsize > 0) { 537 fs32_add(sb, &fraglist[fragsize], cnt); 538 fragsize = 0; 539 } 540 } 541 if (fragsize > 0 && fragsize < uspi->s_fpb) 542 fs32_add(sb, &fraglist[fragsize], cnt); 543} 544 545static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi, 546 struct ufs_inode_info *ufsi, 547 unsigned blk) 548{ 549 BUG_ON(blk > UFS_TIND_BLOCK); 550 return uspi->fs_magic == UFS2_MAGIC ? 551 (void *)&ufsi->i_u1.u2_i_data[blk] : 552 (void *)&ufsi->i_u1.i_data[blk]; 553} 554 555static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p) 556{ 557 return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ? 558 fs64_to_cpu(sb, *(__fs64 *)p) : 559 fs32_to_cpu(sb, *(__fs32 *)p); 560} 561 562static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val) 563{ 564 if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC) 565 *(__fs64 *)p = cpu_to_fs64(sb, val); 566 else 567 *(__fs32 *)p = cpu_to_fs32(sb, val); 568} 569 570static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi, 571 void *p) 572{ 573 if (uspi->fs_magic == UFS2_MAGIC) 574 *(__fs64 *)p = 0; 575 else 576 *(__fs32 *)p = 0; 577} 578 579static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi, 580 void *p) 581{ 582 if (uspi->fs_magic == UFS2_MAGIC) 583 return *(__fs64 *)p == 0; 584 else 585 return *(__fs32 *)p == 0; 586} 587 588static inline __fs32 ufs_get_seconds(struct super_block *sbp) 589{ 590 time64_t now = ktime_get_real_seconds(); 591 592 /* Signed 32-bit interpretation wraps around in 2038, which 593 * happens in ufs1 inode stamps but not ufs2 using 64-bits 594 * stamps. For superblock and blockgroup, let's assume 595 * unsigned 32-bit stamps, which are good until y2106. 596 * Wrap around rather than clamp here to make the dirty 597 * file system detection work in the superblock stamp. 598 */ 599 return cpu_to_fs32(sbp, lower_32_bits(now)); 600} 601