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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - fs/ufs/util.h
6a0b48cf9cef8dab07ccba43bfbe35d19c4b87ec
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
9 #include <linux/buffer_head.h>
17 #define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
20 * functions used for retyping
22 static inline struct ufs_buffer_head
*UCPI_UBH(struct ufs_cg_private_info
*cpi
)
26 static inline struct ufs_buffer_head
*USPI_UBH(struct ufs_sb_private_info
*spi
)
34 * macros used for accessing structures
37 ufs_get_fs_state(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
38 struct ufs_super_block_third
*usb3
)
40 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
42 return fs32_to_cpu(sb
, usb3
->fs_u2
.fs_sun
.fs_state
);
44 return fs32_to_cpu(sb
, usb1
->fs_u1
.fs_sunx86
.fs_state
);
47 return fs32_to_cpu(sb
, usb3
->fs_u2
.fs_44
.fs_state
);
52 ufs_set_fs_state(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
53 struct ufs_super_block_third
*usb3
, s32 value
)
55 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
57 usb3
->fs_u2
.fs_sun
.fs_state
= cpu_to_fs32(sb
, value
);
60 usb1
->fs_u1
.fs_sunx86
.fs_state
= cpu_to_fs32(sb
, value
);
63 usb3
->fs_u2
.fs_44
.fs_state
= cpu_to_fs32(sb
, value
);
69 ufs_get_fs_npsect(struct super_block
*sb
, struct ufs_super_block_first
*usb1
,
70 struct ufs_super_block_third
*usb3
)
72 if ((UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) == UFS_ST_SUNx86
)
73 return fs32_to_cpu(sb
, usb3
->fs_u2
.fs_sunx86
.fs_npsect
);
75 return fs32_to_cpu(sb
, usb1
->fs_u1
.fs_sun
.fs_npsect
);
79 ufs_get_fs_qbmask(struct super_block
*sb
, struct ufs_super_block_third
*usb3
)
83 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
85 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_sun
.fs_qbmask
[0];
86 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_sun
.fs_qbmask
[1];
89 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_sunx86
.fs_qbmask
[0];
90 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_sunx86
.fs_qbmask
[1];
93 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_44
.fs_qbmask
[0];
94 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_44
.fs_qbmask
[1];
98 return fs64_to_cpu(sb
, tmp
);
102 ufs_get_fs_qfmask(struct super_block
*sb
, struct ufs_super_block_third
*usb3
)
106 switch (UFS_SB(sb
)->s_flags
& UFS_ST_MASK
) {
108 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_sun
.fs_qfmask
[0];
109 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_sun
.fs_qfmask
[1];
112 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_sunx86
.fs_qfmask
[0];
113 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_sunx86
.fs_qfmask
[1];
116 ((__fs32
*)&tmp
)[0] = usb3
->fs_u2
.fs_44
.fs_qfmask
[0];
117 ((__fs32
*)&tmp
)[1] = usb3
->fs_u2
.fs_44
.fs_qfmask
[1];
121 return fs64_to_cpu(sb
, tmp
);
125 ufs_get_de_namlen(struct super_block
*sb
, struct ufs_dir_entry
*de
)
127 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) == UFS_DE_OLD
)
128 return fs16_to_cpu(sb
, de
->d_u
.d_namlen
);
130 return de
->d_u
.d_44
.d_namlen
; /* XXX this seems wrong */
134 ufs_set_de_namlen(struct super_block
*sb
, struct ufs_dir_entry
*de
, u16 value
)
136 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) == UFS_DE_OLD
)
137 de
->d_u
.d_namlen
= cpu_to_fs16(sb
, value
);
139 de
->d_u
.d_44
.d_namlen
= value
; /* XXX this seems wrong */
143 ufs_set_de_type(struct super_block
*sb
, struct ufs_dir_entry
*de
, int mode
)
145 if ((UFS_SB(sb
)->s_flags
& UFS_DE_MASK
) != UFS_DE_44BSD
)
149 * TODO turn this into a table lookup
151 switch (mode
& S_IFMT
) {
153 de
->d_u
.d_44
.d_type
= DT_SOCK
;
156 de
->d_u
.d_44
.d_type
= DT_LNK
;
159 de
->d_u
.d_44
.d_type
= DT_REG
;
162 de
->d_u
.d_44
.d_type
= DT_BLK
;
165 de
->d_u
.d_44
.d_type
= DT_DIR
;
168 de
->d_u
.d_44
.d_type
= DT_CHR
;
171 de
->d_u
.d_44
.d_type
= DT_FIFO
;
174 de
->d_u
.d_44
.d_type
= DT_UNKNOWN
;
179 ufs_get_inode_uid(struct super_block
*sb
, struct ufs_inode
*inode
)
181 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
183 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_sun
.ui_uid
);
185 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_44
.ui_uid
);
187 return fs16_to_cpu(sb
, inode
->ui_u1
.oldids
.ui_suid
);
192 ufs_set_inode_uid(struct super_block
*sb
, struct ufs_inode
*inode
, u32 value
)
194 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
196 inode
->ui_u3
.ui_sun
.ui_uid
= cpu_to_fs32(sb
, value
);
199 inode
->ui_u3
.ui_44
.ui_uid
= cpu_to_fs32(sb
, value
);
202 inode
->ui_u1
.oldids
.ui_suid
= cpu_to_fs16(sb
, value
);
206 ufs_get_inode_gid(struct super_block
*sb
, struct ufs_inode
*inode
)
208 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
210 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_sun
.ui_gid
);
212 return fs32_to_cpu(sb
, inode
->ui_u3
.ui_44
.ui_gid
);
214 return fs16_to_cpu(sb
, inode
->ui_u1
.oldids
.ui_sgid
);
219 ufs_set_inode_gid(struct super_block
*sb
, struct ufs_inode
*inode
, u32 value
)
221 switch (UFS_SB(sb
)->s_flags
& UFS_UID_MASK
) {
223 inode
->ui_u3
.ui_sun
.ui_gid
= cpu_to_fs32(sb
, value
);
226 inode
->ui_u3
.ui_44
.ui_gid
= cpu_to_fs32(sb
, value
);
229 inode
->ui_u1
.oldids
.ui_sgid
= cpu_to_fs16(sb
, value
);
232 extern dev_t
ufs_get_inode_dev(struct super_block
*, struct ufs_inode_info
*);
233 extern void ufs_set_inode_dev(struct super_block
*, struct ufs_inode_info
*, dev_t
);
236 * These functions manipulate ufs buffers
238 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
239 extern struct ufs_buffer_head
* _ubh_bread_(struct ufs_sb_private_info
*, struct super_block
*, u64
, u64
);
240 extern struct ufs_buffer_head
* ubh_bread_uspi(struct ufs_sb_private_info
*, struct super_block
*, u64
, u64
);
241 extern void ubh_brelse (struct ufs_buffer_head
*);
242 extern void ubh_brelse_uspi (struct ufs_sb_private_info
*);
243 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head
*);
244 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head
*, int);
245 extern void ubh_ll_rw_block (int, unsigned, struct ufs_buffer_head
**);
246 extern void ubh_wait_on_buffer (struct ufs_buffer_head
*);
247 extern void ubh_bforget (struct ufs_buffer_head
*);
248 extern int ubh_buffer_dirty (struct ufs_buffer_head
*);
249 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
250 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info
*, unsigned char *, struct ufs_buffer_head
*, unsigned);
251 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
252 extern void _ubh_memcpyubh_(struct ufs_sb_private_info
*, struct ufs_buffer_head
*, unsigned char *, unsigned);
257 * macros and inline function to get important structures from ufs_sb_private_info
260 static inline void *get_usb_offset(struct ufs_sb_private_info
*uspi
,
265 index
= offset
>> uspi
->s_fshift
;
266 offset
&= ~uspi
->s_fmask
;
267 return uspi
->s_ubh
.bh
[index
]->b_data
+ offset
;
270 #define ubh_get_usb_first(uspi) \
271 ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
273 #define ubh_get_usb_second(uspi) \
274 ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
276 #define ubh_get_usb_third(uspi) \
277 ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
280 #define ubh_get_ucg(ubh) \
281 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
285 * Extract byte from ufs_buffer_head
286 * Extract the bits for a block from a map inside ufs_buffer_head
288 #define ubh_get_addr8(ubh,begin) \
289 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
290 ((begin) & ~uspi->s_fmask))
292 #define ubh_get_addr16(ubh,begin) \
293 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
294 ((begin) & (uspi->fsize>>1) - 1)))
296 #define ubh_get_addr32(ubh,begin) \
297 (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
298 ((begin) & ((uspi->s_fsize>>2) - 1)))
300 #define ubh_get_addr ubh_get_addr8
302 #define ubh_blkmap(ubh,begin,bit) \
303 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
307 * Macros for access to superblock array structures
309 #define ubh_postbl(ubh,cylno,i) \
310 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
311 ? (*(__s16*)(ubh_get_addr(ubh, \
312 (unsigned)(&((struct ufs_super_block *)0)->fs_opostbl) \
313 + (((cylno) * 16 + (i)) << 1) ) )) \
314 : (*(__s16*)(ubh_get_addr(ubh, \
315 uspi->s_postbloff + (((cylno) * uspi->s_nrpos + (i)) << 1) ))))
317 #define ubh_rotbl(ubh,i) \
318 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
319 ? (*(__u8*)(ubh_get_addr(ubh, \
320 (unsigned)(&((struct ufs_super_block *)0)->fs_space) + (i)))) \
321 : (*(__u8*)(ubh_get_addr(ubh, uspi->s_rotbloff + (i)))))
324 * Determine the number of available frags given a
325 * percentage to hold in reserve.
327 #define ufs_freespace(usb, percentreserved) \
328 (ufs_blkstofrags(fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nbfree)) + \
329 fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nffree) - (uspi->s_dsize * (percentreserved) / 100))
332 * Macros to access cylinder group array structures
334 #define ubh_cg_blktot(ucpi,cylno) \
335 (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
337 #define ubh_cg_blks(ucpi,cylno,rpos) \
338 (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
339 (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
343 * These functions work like classical bitmap operations.
344 * The difference is that we don't have the whole bitmap
345 * in one contiguous chunk of memory, but in several buffers.
346 * The parameters of each function are super_block, ufs_buffer_head and
347 * position of the beginning of the bitmap.
349 #define ubh_setbit(ubh,begin,bit) \
350 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
352 #define ubh_clrbit(ubh,begin,bit) \
353 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
355 #define ubh_isset(ubh,begin,bit) \
356 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
358 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
360 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
362 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
363 static inline unsigned _ubh_find_next_zero_bit_(
364 struct ufs_sb_private_info
* uspi
, struct ufs_buffer_head
* ubh
,
365 unsigned begin
, unsigned size
, unsigned offset
)
367 unsigned base
, count
, pos
;
372 base
= offset
>> uspi
->s_bpfshift
;
373 offset
&= uspi
->s_bpfmask
;
375 count
= min_t(unsigned int, size
+ offset
, uspi
->s_bpf
);
376 size
-= count
- offset
;
377 pos
= ext2_find_next_zero_bit (ubh
->bh
[base
]->b_data
, count
, offset
);
378 if (pos
< count
|| !size
)
383 return (base
<< uspi
->s_bpfshift
) + pos
- begin
;
386 static inline unsigned find_last_zero_bit (unsigned char * bitmap
,
387 unsigned size
, unsigned offset
)
390 unsigned char * mapp
;
393 mapp
= bitmap
+ (size
>> 3);
395 bit
= 1 << (size
& 7);
396 for (i
= size
; i
> offset
; i
--) {
397 if ((map
& bit
) == 0)
409 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
410 static inline unsigned _ubh_find_last_zero_bit_(
411 struct ufs_sb_private_info
* uspi
, struct ufs_buffer_head
* ubh
,
412 unsigned begin
, unsigned start
, unsigned end
)
414 unsigned base
, count
, pos
, size
;
419 base
= start
>> uspi
->s_bpfshift
;
420 start
&= uspi
->s_bpfmask
;
422 count
= min_t(unsigned int,
423 size
+ (uspi
->s_bpf
- start
), uspi
->s_bpf
)
424 - (uspi
->s_bpf
- start
);
426 pos
= find_last_zero_bit (ubh
->bh
[base
]->b_data
,
427 start
, start
- count
);
428 if (pos
> start
- count
|| !size
)
433 return (base
<< uspi
->s_bpfshift
) + pos
- begin
;
436 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
438 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
439 static inline int _ubh_isblockset_(struct ufs_sb_private_info
* uspi
,
440 struct ufs_buffer_head
* ubh
, unsigned begin
, unsigned block
)
442 switch (uspi
->s_fpb
) {
444 return (*ubh_get_addr (ubh
, begin
+ block
) == 0xff);
446 return (*ubh_get_addr (ubh
, begin
+ (block
>> 1)) == (0x0f << ((block
& 0x01) << 2)));
448 return (*ubh_get_addr (ubh
, begin
+ (block
>> 2)) == (0x03 << ((block
& 0x03) << 1)));
450 return (*ubh_get_addr (ubh
, begin
+ (block
>> 3)) == (0x01 << (block
& 0x07)));
455 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
456 static inline void _ubh_clrblock_(struct ufs_sb_private_info
* uspi
,
457 struct ufs_buffer_head
* ubh
, unsigned begin
, unsigned block
)
459 switch (uspi
->s_fpb
) {
461 *ubh_get_addr (ubh
, begin
+ block
) = 0x00;
464 *ubh_get_addr (ubh
, begin
+ (block
>> 1)) &= ~(0x0f << ((block
& 0x01) << 2));
467 *ubh_get_addr (ubh
, begin
+ (block
>> 2)) &= ~(0x03 << ((block
& 0x03) << 1));
470 *ubh_get_addr (ubh
, begin
+ (block
>> 3)) &= ~(0x01 << ((block
& 0x07)));
475 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
476 static inline void _ubh_setblock_(struct ufs_sb_private_info
* uspi
,
477 struct ufs_buffer_head
* ubh
, unsigned begin
, unsigned block
)
479 switch (uspi
->s_fpb
) {
481 *ubh_get_addr(ubh
, begin
+ block
) = 0xff;
484 *ubh_get_addr(ubh
, begin
+ (block
>> 1)) |= (0x0f << ((block
& 0x01) << 2));
487 *ubh_get_addr(ubh
, begin
+ (block
>> 2)) |= (0x03 << ((block
& 0x03) << 1));
490 *ubh_get_addr(ubh
, begin
+ (block
>> 3)) |= (0x01 << ((block
& 0x07)));
495 static inline void ufs_fragacct (struct super_block
* sb
, unsigned blockmap
,
496 __fs32
* fraglist
, int cnt
)
498 struct ufs_sb_private_info
* uspi
;
499 unsigned fragsize
, pos
;
501 uspi
= UFS_SB(sb
)->s_uspi
;
504 for (pos
= 0; pos
< uspi
->s_fpb
; pos
++) {
505 if (blockmap
& (1 << pos
)) {
508 else if (fragsize
> 0) {
509 fs32_add(sb
, &fraglist
[fragsize
], cnt
);
513 if (fragsize
> 0 && fragsize
< uspi
->s_fpb
)
514 fs32_add(sb
, &fraglist
[fragsize
], cnt
);
517 #define ubh_scanc(ubh,begin,size,table,mask) _ubh_scanc_(uspi,ubh,begin,size,table,mask)
518 static inline unsigned _ubh_scanc_(struct ufs_sb_private_info
* uspi
, struct ufs_buffer_head
* ubh
,
519 unsigned begin
, unsigned size
, unsigned char * table
, unsigned char mask
)
521 unsigned rest
, offset
;
525 offset
= begin
& ~uspi
->s_fmask
;
526 begin
>>= uspi
->s_fshift
;
528 if ((offset
+ size
) < uspi
->s_fsize
)
531 rest
= uspi
->s_fsize
- offset
;
533 cp
= ubh
->bh
[begin
]->b_data
+ offset
;
534 while ((table
[*cp
++] & mask
) == 0 && --rest
);
540 return (size
+ rest
);