]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/ufs/util.h
1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Daniel Pirkl <daniel.pirkl@email.cz>
7 * Charles University, Faculty of Mathematics and Physics
10 #include <linux/buffer_head.h>
18 #define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
21 * functions used for retyping
23 static inline struct ufs_buffer_head
*UCPI_UBH(struct ufs_cg_private_info
*cpi
)
27 static inline struct ufs_buffer_head
*USPI_UBH(struct ufs_sb_private_info
*spi
)
35 * macros used for accessing structures
38 ufs_get_fs_state(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
39 struct ufs_super_block_third
*usb3
)
41 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
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 /* Fall Through to UFS_ST_SUN */
47 return fs32_to_cpu(sb
, usb3
->fs_un2
.fs_sun
.fs_state
);
49 return fs32_to_cpu(sb
, usb1
->fs_u1
.fs_sunx86
.fs_state
);
52 return fs32_to_cpu(sb
, usb3
->fs_un2
.fs_44
.fs_state
);
57 ufs_set_fs_state(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
58 struct ufs_super_block_third
*usb3
, s32 value
)
60 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
62 if (fs32_to_cpu(sb
, usb3
->fs_postblformat
) == UFS_42POSTBLFMT
) {
63 usb1
->fs_u0
.fs_sun
.fs_state
= cpu_to_fs32(sb
, value
);
66 /* Fall Through to UFS_ST_SUN */
68 usb3
->fs_un2
.fs_sun
.fs_state
= cpu_to_fs32(sb
, value
);
71 usb1
->fs_u1
.fs_sunx86
.fs_state
= cpu_to_fs32(sb
, value
);
74 usb3
->fs_un2
.fs_44
.fs_state
= cpu_to_fs32(sb
, value
);
80 ufs_get_fs_npsect(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
81 struct ufs_super_block_third
*usb3
)
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
);
86 return fs32_to_cpu(sb
, usb1
->fs_u1
.fs_sun
.fs_npsect
);
90 ufs_get_fs_qbmask(struct super_block
*sb
, struct ufs_super_block_third
*usb3
)
94 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
97 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_sun
.fs_qbmask
[0];
98 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_sun
.fs_qbmask
[1];
101 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_sunx86
.fs_qbmask
[0];
102 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_sunx86
.fs_qbmask
[1];
105 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_44
.fs_qbmask
[0];
106 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_44
.fs_qbmask
[1];
110 return fs64_to_cpu(sb
, tmp
);
114 ufs_get_fs_qfmask(struct super_block
*sb
, struct ufs_super_block_third
*usb3
)
118 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
121 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_sun
.fs_qfmask
[0];
122 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_sun
.fs_qfmask
[1];
125 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_sunx86
.fs_qfmask
[0];
126 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_sunx86
.fs_qfmask
[1];
129 ((__fs32
*)&tmp
)[0] = usb3
->fs_un2
.fs_44
.fs_qfmask
[0];
130 ((__fs32
*)&tmp
)[1] = usb3
->fs_un2
.fs_44
.fs_qfmask
[1];
134 return fs64_to_cpu(sb
, tmp
);
138 ufs_get_de_namlen(struct super_block
*sb
, struct ufs_dir_entry
*de
)
140 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) == UFS_DE_OLD
)
141 return fs16_to_cpu(sb
, de
->d_u
.d_namlen
);
143 return de
->d_u
.d_44
.d_namlen
; /* XXX this seems wrong */
147 ufs_set_de_namlen(struct super_block
*sb
, struct ufs_dir_entry
*de
, u16 value
)
149 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) == UFS_DE_OLD
)
150 de
->d_u
.d_namlen
= cpu_to_fs16(sb
, value
);
152 de
->d_u
.d_44
.d_namlen
= value
; /* XXX this seems wrong */
156 ufs_set_de_type(struct super_block
*sb
, struct ufs_dir_entry
*de
, int mode
)
158 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) != UFS_DE_44BSD
)
162 * TODO turn this into a table lookup
164 switch (mode
& S_IFMT
) {
166 de
->d_u
.d_44
.d_type
= DT_SOCK
;
169 de
->d_u
.d_44
.d_type
= DT_LNK
;
172 de
->d_u
.d_44
.d_type
= DT_REG
;
175 de
->d_u
.d_44
.d_type
= DT_BLK
;
178 de
->d_u
.d_44
.d_type
= DT_DIR
;
181 de
->d_u
.d_44
.d_type
= DT_CHR
;
184 de
->d_u
.d_44
.d_type
= DT_FIFO
;
187 de
->d_u
.d_44
.d_type
= DT_UNKNOWN
;
192 ufs_get_inode_uid(struct super_block
*sb
, struct ufs_inode
*inode
)
194 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
196 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_44
.ui_uid
);
198 if (inode
->ui_u1
.oldids
.ui_suid
== 0xFFFF)
199 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_sun
.ui_uid
);
202 return fs16_to_cpu(sb
, inode
->ui_u1
.oldids
.ui_suid
);
207 ufs_set_inode_uid(struct super_block
*sb
, struct ufs_inode
*inode
, u32 value
)
209 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
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
);
215 inode
->ui_u3
.ui_sun
.ui_uid
= cpu_to_fs32(sb
, value
);
220 inode
->ui_u1
.oldids
.ui_suid
= cpu_to_fs16(sb
, value
);
226 ufs_get_inode_gid(struct super_block
*sb
, struct ufs_inode
*inode
)
228 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
230 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_44
.ui_gid
);
232 if (inode
->ui_u1
.oldids
.ui_suid
== 0xFFFF)
233 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_sun
.ui_gid
);
236 return fs16_to_cpu(sb
, inode
->ui_u1
.oldids
.ui_sgid
);
241 ufs_set_inode_gid(struct super_block
*sb
, struct ufs_inode
*inode
, u32 value
)
243 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
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
);
249 inode
->ui_u3
.ui_sun
.ui_gid
= cpu_to_fs32(sb
, value
);
254 inode
->ui_u1
.oldids
.ui_sgid
= cpu_to_fs16(sb
, value
);
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
);
264 * These functions manipulate ufs buffers
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);
281 /* This functions works with cache pages*/
282 extern struct page
*ufs_get_locked_page(struct address_space
*mapping
,
284 static inline void ufs_put_locked_page(struct page
*page
)
292 * macros and inline function to get important structures from ufs_sb_private_info
295 static inline void *get_usb_offset(struct ufs_sb_private_info
*uspi
,
300 index
= offset
>> uspi
->s_fshift
;
301 offset
&= ~uspi
->s_fmask
;
302 return uspi
->s_ubh
.bh
[index
]->b_data
+ offset
;
305 #define ubh_get_usb_first(uspi) \
306 ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
308 #define ubh_get_usb_second(uspi) \
309 ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
311 #define ubh_get_usb_third(uspi) \
312 ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
315 #define ubh_get_ucg(ubh) \
316 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
320 * Extract byte from ufs_buffer_head
321 * Extract the bits for a block from a map inside ufs_buffer_head
323 #define ubh_get_addr8(ubh,begin) \
324 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
325 ((begin) & ~uspi->s_fmask))
327 #define ubh_get_addr16(ubh,begin) \
328 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
329 ((begin) & ((uspi->fsize>>1) - 1)))
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)))
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)))
339 #define ubh_get_addr ubh_get_addr8
341 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info
*uspi
,
342 struct ufs_buffer_head
*ubh
,
345 if (uspi
->fs_magic
== UFS2_MAGIC
)
346 return ubh_get_addr64(ubh
, blk
);
348 return ubh_get_addr32(ubh
, blk
);
351 #define ubh_blkmap(ubh,begin,bit) \
352 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
355 ufs_freefrags(struct ufs_sb_private_info
*uspi
)
357 return ufs_blkstofrags(uspi
->cs_total
.cs_nbfree
) +
358 uspi
->cs_total
.cs_nffree
;
362 * Macros to access cylinder group array structures
364 #define ubh_cg_blktot(ucpi,cylno) \
365 (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
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 ))))
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.
379 #define ubh_setbit(ubh,begin,bit) \
380 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
382 #define ubh_clrbit(ubh,begin,bit) \
383 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
385 #define ubh_isset(ubh,begin,bit) \
386 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
388 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
390 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
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
)
397 unsigned base
, count
, pos
;
402 base
= offset
>> uspi
->s_bpfshift
;
403 offset
&= uspi
->s_bpfmask
;
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
)
413 return (base
<< uspi
->s_bpfshift
) + pos
- begin
;
416 static inline unsigned find_last_zero_bit (unsigned char * bitmap
,
417 unsigned size
, unsigned offset
)
420 unsigned char * mapp
;
423 mapp
= bitmap
+ (size
>> 3);
425 bit
= 1 << (size
& 7);
426 for (i
= size
; i
> offset
; i
--) {
427 if ((map
& bit
) == 0)
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
)
444 unsigned base
, count
, pos
, size
;
449 base
= start
>> uspi
->s_bpfshift
;
450 start
&= uspi
->s_bpfmask
;
452 count
= min_t(unsigned int,
453 size
+ (uspi
->s_bpf
- start
), uspi
->s_bpf
)
454 - (uspi
->s_bpf
- start
);
456 pos
= find_last_zero_bit (ubh
->bh
[base
]->b_data
,
457 start
, start
- count
);
458 if (pos
> start
- count
|| !size
)
463 return (base
<< uspi
->s_bpfshift
) + pos
- begin
;
466 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
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
)
473 switch (uspi
->s_fpb
) {
475 return (*ubh_get_addr (ubh
, begin
+ block
) == 0xff);
477 mask
= 0x0f << ((block
& 0x01) << 2);
478 return (*ubh_get_addr (ubh
, begin
+ (block
>> 1)) & mask
) == mask
;
480 mask
= 0x03 << ((block
& 0x03) << 1);
481 return (*ubh_get_addr (ubh
, begin
+ (block
>> 2)) & mask
) == mask
;
483 mask
= 0x01 << (block
& 0x07);
484 return (*ubh_get_addr (ubh
, begin
+ (block
>> 3)) & mask
) == mask
;
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
)
493 switch (uspi
->s_fpb
) {
495 *ubh_get_addr (ubh
, begin
+ block
) = 0x00;
498 *ubh_get_addr (ubh
, begin
+ (block
>> 1)) &= ~(0x0f << ((block
& 0x01) << 2));
501 *ubh_get_addr (ubh
, begin
+ (block
>> 2)) &= ~(0x03 << ((block
& 0x03) << 1));
504 *ubh_get_addr (ubh
, begin
+ (block
>> 3)) &= ~(0x01 << ((block
& 0x07)));
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
)
513 switch (uspi
->s_fpb
) {
515 *ubh_get_addr(ubh
, begin
+ block
) = 0xff;
518 *ubh_get_addr(ubh
, begin
+ (block
>> 1)) |= (0x0f << ((block
& 0x01) << 2));
521 *ubh_get_addr(ubh
, begin
+ (block
>> 2)) |= (0x03 << ((block
& 0x03) << 1));
524 *ubh_get_addr(ubh
, begin
+ (block
>> 3)) |= (0x01 << ((block
& 0x07)));
529 static inline void ufs_fragacct (struct super_block
* sb
, unsigned blockmap
,
530 __fs32
* fraglist
, int cnt
)
532 struct ufs_sb_private_info
* uspi
;
533 unsigned fragsize
, pos
;
535 uspi
= UFS_SB(sb
)->s_uspi
;
538 for (pos
= 0; pos
< uspi
->s_fpb
; pos
++) {
539 if (blockmap
& (1 << pos
)) {
542 else if (fragsize
> 0) {
543 fs32_add(sb
, &fraglist
[fragsize
], cnt
);
547 if (fragsize
> 0 && fragsize
< uspi
->s_fpb
)
548 fs32_add(sb
, &fraglist
[fragsize
], cnt
);
551 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info
*uspi
,
552 struct ufs_inode_info
*ufsi
,
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
];
561 static inline u64
ufs_data_ptr_to_cpu(struct super_block
*sb
, void *p
)
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
);
568 static inline void ufs_cpu_to_data_ptr(struct super_block
*sb
, void *p
, u64 val
)
570 if (UFS_SB(sb
)->s_uspi
->fs_magic
== UFS2_MAGIC
)
571 *(__fs64
*)p
= cpu_to_fs64(sb
, val
);
573 *(__fs32
*)p
= cpu_to_fs32(sb
, val
);
576 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info
*uspi
,
579 if (uspi
->fs_magic
== UFS2_MAGIC
)
585 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info
*uspi
,
588 if (uspi
->fs_magic
== UFS2_MAGIC
)
589 return *(__fs64
*)p
== 0;
591 return *(__fs32
*)p
== 0;