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conn rcv_lock converted to spinlock, struct cor_sock created, kernel_packet skb_clone...
[cor_2_6_31.git] / fs / ufs / util.h
blob23ceed8c8fb9d42bbadb2166c4a99625a19afed9
1 /*
2 * linux/fs/ufs/util.h
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9 #include <linux/buffer_head.h>
10 #include <linux/fs.h>
11 #include "swab.h"
12
13
14 /*
15 * some useful macros
16 */
17 #define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
18
19 /*
20 * functions used for retyping
21 */
22 static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
23 {
24 return &cpi->c_ubh;
25 }
26 static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
27 {
28 return &spi->s_ubh;
29 }
30
31
32
33 /*
34 * macros used for accessing structures
35 */
36 static inline s32
37 ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
38 struct ufs_super_block_third *usb3)
39 {
40 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
41 case UFS_ST_SUNOS:
42 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
43 return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
44 /* Fall Through to UFS_ST_SUN */
45 case UFS_ST_SUN:
46 return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
47 case UFS_ST_SUNx86:
48 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
49 case UFS_ST_44BSD:
50 default:
51 return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
52 }
53 }
54
55 static inline void
56 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
57 struct ufs_super_block_third *usb3, s32 value)
58 {
59 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
60 case UFS_ST_SUNOS:
61 if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
62 usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
63 break;
64 }
65 /* Fall Through to UFS_ST_SUN */
66 case UFS_ST_SUN:
67 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
68 break;
69 case UFS_ST_SUNx86:
70 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
71 break;
72 case UFS_ST_44BSD:
73 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
74 break;
75 }
76 }
77
78 static inline u32
79 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
80 struct ufs_super_block_third *usb3)
81 {
82 if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
83 return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
84 else
85 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
86 }
87
88 static inline u64
89 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
90 {
91 __fs64 tmp;
92
93 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
94 case UFS_ST_SUNOS:
95 case UFS_ST_SUN:
96 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
97 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
98 break;
99 case UFS_ST_SUNx86:
100 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
101 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
102 break;
103 case UFS_ST_44BSD:
104 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
105 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
106 break;
107 }
108
109 return fs64_to_cpu(sb, tmp);
110 }
111
112 static inline u64
113 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
114 {
115 __fs64 tmp;
116
117 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
118 case UFS_ST_SUNOS:
119 case UFS_ST_SUN:
120 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
121 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
122 break;
123 case UFS_ST_SUNx86:
124 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
125 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
126 break;
127 case UFS_ST_44BSD:
128 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
129 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
130 break;
131 }
132
133 return fs64_to_cpu(sb, tmp);
134 }
135
136 static inline u16
137 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
138 {
139 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
140 return fs16_to_cpu(sb, de->d_u.d_namlen);
141 else
142 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
143 }
144
145 static inline void
146 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
147 {
148 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
149 de->d_u.d_namlen = cpu_to_fs16(sb, value);
150 else
151 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
152 }
153
154 static inline void
155 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
156 {
157 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
158 return;
159
160 /*
161 * TODO turn this into a table lookup
162 */
163 switch (mode & S_IFMT) {
164 case S_IFSOCK:
165 de->d_u.d_44.d_type = DT_SOCK;
166 break;
167 case S_IFLNK:
168 de->d_u.d_44.d_type = DT_LNK;
169 break;
170 case S_IFREG:
171 de->d_u.d_44.d_type = DT_REG;
172 break;
173 case S_IFBLK:
174 de->d_u.d_44.d_type = DT_BLK;
175 break;
176 case S_IFDIR:
177 de->d_u.d_44.d_type = DT_DIR;
178 break;
179 case S_IFCHR:
180 de->d_u.d_44.d_type = DT_CHR;
181 break;
182 case S_IFIFO:
183 de->d_u.d_44.d_type = DT_FIFO;
184 break;
185 default:
186 de->d_u.d_44.d_type = DT_UNKNOWN;
187 }
188 }
189
190 static inline u32
191 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
192 {
193 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
194 case UFS_UID_44BSD:
195 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
196 case UFS_UID_EFT:
197 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
198 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
199 /* Fall through */
200 default:
201 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
202 }
203 }
204
205 static inline void
206 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
207 {
208 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
209 case UFS_UID_44BSD:
210 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
211 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
212 break;
213 case UFS_UID_EFT:
214 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
215 if (value > 0xFFFF)
216 value = 0xFFFF;
217 /* Fall through */
218 default:
219 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
220 break;
221 }
222 }
223
224 static inline u32
225 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
226 {
227 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
228 case UFS_UID_44BSD:
229 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
230 case UFS_UID_EFT:
231 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
232 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
233 /* Fall through */
234 default:
235 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
236 }
237 }
238
239 static inline void
240 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
241 {
242 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
243 case UFS_UID_44BSD:
244 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
245 inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
246 break;
247 case UFS_UID_EFT:
248 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
249 if (value > 0xFFFF)
250 value = 0xFFFF;
251 /* Fall through */
252 default:
253 inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
254 break;
255 }
256 }
257
258 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
259 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
260 extern int __ufs_write_begin(struct file *file, struct address_space *mapping,
261 loff_t pos, unsigned len, unsigned flags,
262 struct page **pagep, void **fsdata);
263
264 /*
265 * These functions manipulate ufs buffers
266 */
267 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
268 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
269 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
270 extern void ubh_brelse (struct ufs_buffer_head *);
271 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
272 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
273 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
274 extern void ubh_ll_rw_block(int, struct ufs_buffer_head *);
275 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
276 extern void ubh_bforget (struct ufs_buffer_head *);
277 extern int ubh_buffer_dirty (struct ufs_buffer_head *);
278 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
279 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
280 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
281 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
282
283 /* This functions works with cache pages*/
284 extern struct page *ufs_get_locked_page(struct address_space *mapping,
285 pgoff_t index);
286 static inline void ufs_put_locked_page(struct page *page)
287 {
288 unlock_page(page);
289 page_cache_release(page);
290 }
291
292
293 /*
294 * macros and inline function to get important structures from ufs_sb_private_info
295 */
296
297 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
298 unsigned int offset)
299 {
300 unsigned int index;
301
302 index = offset >> uspi->s_fshift;
303 offset &= ~uspi->s_fmask;
304 return uspi->s_ubh.bh[index]->b_data + offset;
305 }
306
307 #define ubh_get_usb_first(uspi) \
308 ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
309
310 #define ubh_get_usb_second(uspi) \
311 ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
312
313 #define ubh_get_usb_third(uspi) \
314 ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
315
316
317 #define ubh_get_ucg(ubh) \
318 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
319
320
321 /*
322 * Extract byte from ufs_buffer_head
323 * Extract the bits for a block from a map inside ufs_buffer_head
324 */
325 #define ubh_get_addr8(ubh,begin) \
326 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
327 ((begin) & ~uspi->s_fmask))
328
329 #define ubh_get_addr16(ubh,begin) \
330 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
331 ((begin) & ((uspi->fsize>>1) - 1)))
332
333 #define ubh_get_addr32(ubh,begin) \
334 (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
335 ((begin) & ((uspi->s_fsize>>2) - 1)))
336
337 #define ubh_get_addr64(ubh,begin) \
338 (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
339 ((begin) & ((uspi->s_fsize>>3) - 1)))
340
341 #define ubh_get_addr ubh_get_addr8
342
343 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
344 struct ufs_buffer_head *ubh,
345 u64 blk)
346 {
347 if (uspi->fs_magic == UFS2_MAGIC)
348 return ubh_get_addr64(ubh, blk);
349 else
350 return ubh_get_addr32(ubh, blk);
351 }
352
353 #define ubh_blkmap(ubh,begin,bit) \
354 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
355
356 /*
357 * Determine the number of available frags given a
358 * percentage to hold in reserve.
359 */
360 static inline u64
361 ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
362 {
363 return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
364 uspi->cs_total.cs_nffree -
365 (uspi->s_dsize * (percentreserved) / 100);
366 }
367
368 /*
369 * Macros to access cylinder group array structures
370 */
371 #define ubh_cg_blktot(ucpi,cylno) \
372 (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
373
374 #define ubh_cg_blks(ucpi,cylno,rpos) \
375 (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
376 (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
377
378 /*
379 * Bitmap operations
380 * These functions work like classical bitmap operations.
381 * The difference is that we don't have the whole bitmap
382 * in one contiguous chunk of memory, but in several buffers.
383 * The parameters of each function are super_block, ufs_buffer_head and
384 * position of the beginning of the bitmap.
385 */
386 #define ubh_setbit(ubh,begin,bit) \
387 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
388
389 #define ubh_clrbit(ubh,begin,bit) \
390 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
391
392 #define ubh_isset(ubh,begin,bit) \
393 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
394
395 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
396
397 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
398
399 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
400 static inline unsigned _ubh_find_next_zero_bit_(
401 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
402 unsigned begin, unsigned size, unsigned offset)
403 {
404 unsigned base, count, pos;
405
406 size -= offset;
407 begin <<= 3;
408 offset += begin;
409 base = offset >> uspi->s_bpfshift;
410 offset &= uspi->s_bpfmask;
411 for (;;) {
412 count = min_t(unsigned int, size + offset, uspi->s_bpf);
413 size -= count - offset;
414 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
415 if (pos < count || !size)
416 break;
417 base++;
418 offset = 0;
419 }
420 return (base << uspi->s_bpfshift) + pos - begin;
421 }
422
423 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
424 unsigned size, unsigned offset)
425 {
426 unsigned bit, i;
427 unsigned char * mapp;
428 unsigned char map;
429
430 mapp = bitmap + (size >> 3);
431 map = *mapp--;
432 bit = 1 << (size & 7);
433 for (i = size; i > offset; i--) {
434 if ((map & bit) == 0)
435 break;
436 if ((i & 7) != 0) {
437 bit >>= 1;
438 } else {
439 map = *mapp--;
440 bit = 1 << 7;
441 }
442 }
443 return i;
444 }
445
446 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
447 static inline unsigned _ubh_find_last_zero_bit_(
448 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
449 unsigned begin, unsigned start, unsigned end)
450 {
451 unsigned base, count, pos, size;
452
453 size = start - end;
454 begin <<= 3;
455 start += begin;
456 base = start >> uspi->s_bpfshift;
457 start &= uspi->s_bpfmask;
458 for (;;) {
459 count = min_t(unsigned int,
460 size + (uspi->s_bpf - start), uspi->s_bpf)
461 - (uspi->s_bpf - start);
462 size -= count;
463 pos = find_last_zero_bit (ubh->bh[base]->b_data,
464 start, start - count);
465 if (pos > start - count || !size)
466 break;
467 base--;
468 start = uspi->s_bpf;
469 }
470 return (base << uspi->s_bpfshift) + pos - begin;
471 }
472
473 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
474
475 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
476 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
477 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
478 {
479 switch (uspi->s_fpb) {
480 case 8:
481 return (*ubh_get_addr (ubh, begin + block) == 0xff);
482 case 4:
483 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
484 case 2:
485 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
486 case 1:
487 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
488 }
489 return 0;
490 }
491
492 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
493 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
494 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
495 {
496 switch (uspi->s_fpb) {
497 case 8:
498 *ubh_get_addr (ubh, begin + block) = 0x00;
499 return;
500 case 4:
501 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
502 return;
503 case 2:
504 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
505 return;
506 case 1:
507 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
508 return;
509 }
510 }
511
512 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
513 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
514 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
515 {
516 switch (uspi->s_fpb) {
517 case 8:
518 *ubh_get_addr(ubh, begin + block) = 0xff;
519 return;
520 case 4:
521 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
522 return;
523 case 2:
524 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
525 return;
526 case 1:
527 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
528 return;
529 }
530 }
531
532 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
533 __fs32 * fraglist, int cnt)
534 {
535 struct ufs_sb_private_info * uspi;
536 unsigned fragsize, pos;
537
538 uspi = UFS_SB(sb)->s_uspi;
539
540 fragsize = 0;
541 for (pos = 0; pos < uspi->s_fpb; pos++) {
542 if (blockmap & (1 << pos)) {
543 fragsize++;
544 }
545 else if (fragsize > 0) {
546 fs32_add(sb, &fraglist[fragsize], cnt);
547 fragsize = 0;
548 }
549 }
550 if (fragsize > 0 && fragsize < uspi->s_fpb)
551 fs32_add(sb, &fraglist[fragsize], cnt);
552 }
553
554 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
555 struct ufs_inode_info *ufsi,
556 unsigned blk)
557 {
558 BUG_ON(blk > UFS_TIND_BLOCK);
559 return uspi->fs_magic == UFS2_MAGIC ?
560 (void *)&ufsi->i_u1.u2_i_data[blk] :
561 (void *)&ufsi->i_u1.i_data[blk];
562 }
563
564 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
565 {
566 return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
567 fs64_to_cpu(sb, *(__fs64 *)p) :
568 fs32_to_cpu(sb, *(__fs32 *)p);
569 }
570
571 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
572 {
573 if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
574 *(__fs64 *)p = cpu_to_fs64(sb, val);
575 else
576 *(__fs32 *)p = cpu_to_fs32(sb, val);
577 }
578
579 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
580 void *p)
581 {
582 if (uspi->fs_magic == UFS2_MAGIC)
583 *(__fs64 *)p = 0;
584 else
585 *(__fs32 *)p = 0;
586 }
587
588 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
589 void *p)
590 {
591 if (uspi->fs_magic == UFS2_MAGIC)
592 return *(__fs64 *)p == 0;
593 else
594 return *(__fs32 *)p == 0;
595 }
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