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 */
UCPI_UBH(struct ufs_cg_private_info * cpi)17 static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
18 {
19 return &cpi->c_ubh;
20 }
USPI_UBH(struct ufs_sb_private_info * spi)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
ufs_get_fs_state(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_third * usb3)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
ufs_set_fs_state(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_third * usb3,s32 value)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
ufs_get_fs_npsect(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_third * usb3)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
ufs_get_fs_qbmask(struct super_block * sb,struct ufs_super_block_third * usb3)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
ufs_get_fs_qfmask(struct super_block * sb,struct ufs_super_block_third * usb3)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
ufs_get_de_namlen(struct super_block * sb,struct ufs_dir_entry * de)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
ufs_set_de_namlen(struct super_block * sb,struct ufs_dir_entry * de,u16 value)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
ufs_set_de_type(struct super_block * sb,struct ufs_dir_entry * de,int mode)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
ufs_get_inode_uid(struct super_block * sb,struct ufs_inode * inode)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
ufs_set_inode_uid(struct super_block * sb,struct ufs_inode * inode,u32 value)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
ufs_get_inode_gid(struct super_block * sb,struct ufs_inode * inode)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
ufs_set_inode_gid(struct super_block * sb,struct ufs_inode * inode,u32 value)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);
ufs_put_locked_folio(struct folio * folio)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
get_usb_offset(struct ufs_sb_private_info * uspi,unsigned int offset)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
ubh_get_data_ptr(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,u64 blk)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
ufs_freefrags(struct ufs_sb_private_info * uspi)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)
_ubh_find_next_zero_bit_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned size,unsigned 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
find_last_zero_bit(unsigned char * bitmap,unsigned size,unsigned offset)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)
_ubh_find_last_zero_bit_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned start,unsigned end)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
ubh_isblockset(struct ufs_sb_private_info * uspi,struct ufs_cg_private_info * ucpi,unsigned int frag)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
ubh_clrblock(struct ufs_sb_private_info * uspi,struct ufs_cg_private_info * ucpi,unsigned int frag)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
ubh_setblock(struct ufs_sb_private_info * uspi,struct ufs_cg_private_info * ucpi,unsigned int frag)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
ufs_fragacct(struct super_block * sb,unsigned blockmap,__fs32 * fraglist,int cnt)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
ufs_get_direct_data_ptr(struct ufs_sb_private_info * uspi,struct ufs_inode_info * ufsi,unsigned blk)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
ufs_data_ptr_to_cpu(struct super_block * sb,void * p)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
ufs_cpu_to_data_ptr(struct super_block * sb,void * p,u64 val)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
ufs_data_ptr_clear(struct ufs_sb_private_info * uspi,void * p)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
ufs_is_data_ptr_zero(struct ufs_sb_private_info * uspi,void * p)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
ufs_get_seconds(struct super_block * sbp)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 }
598