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 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 */
46 return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
48 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
51 return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
56 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
57 struct ufs_super_block_third *usb3, s32 value)
59 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
61 if (fs32_to_cpu(sb, usb3->fs_postblformat == UFS_42POSTBLFMT)) {
62 usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
65 /* Fall Through to UFS_ST_SUN */
67 usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
70 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
73 usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
79 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
80 struct ufs_super_block_third *usb3)
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);
85 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
89 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
93 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
96 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
97 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
100 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
101 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
104 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
105 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
109 return fs64_to_cpu(sb, tmp);
113 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
117 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
120 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
121 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
124 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
125 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
128 ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
129 ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
133 return fs64_to_cpu(sb, tmp);
137 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
139 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
140 return fs16_to_cpu(sb, de->d_u.d_namlen);
142 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
146 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
148 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
149 de->d_u.d_namlen = cpu_to_fs16(sb, value);
151 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
155 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
157 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
161 * TODO turn this into a table lookup
163 switch (mode & S_IFMT) {
165 de->d_u.d_44.d_type = DT_SOCK;
168 de->d_u.d_44.d_type = DT_LNK;
171 de->d_u.d_44.d_type = DT_REG;
174 de->d_u.d_44.d_type = DT_BLK;
177 de->d_u.d_44.d_type = DT_DIR;
180 de->d_u.d_44.d_type = DT_CHR;
183 de->d_u.d_44.d_type = DT_FIFO;
186 de->d_u.d_44.d_type = DT_UNKNOWN;
191 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
193 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
195 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
197 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
198 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
201 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
206 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
208 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
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);
214 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
219 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
225 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
227 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
229 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
231 if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
232 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
235 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
240 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
242 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
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);
248 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
253 inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
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);
265 * These functions manipulate ufs buffers
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);
283 /* This functions works with cache pages*/
284 extern struct page *ufs_get_locked_page(struct address_space *mapping,
286 static inline void ufs_put_locked_page(struct page *page)
289 page_cache_release(page);
294 * macros and inline function to get important structures from ufs_sb_private_info
297 static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
302 index = offset >> uspi->s_fshift;
303 offset &= ~uspi->s_fmask;
304 return uspi->s_ubh.bh[index]->b_data + offset;
307 #define ubh_get_usb_first(uspi) \
308 ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
310 #define ubh_get_usb_second(uspi) \
311 ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
313 #define ubh_get_usb_third(uspi) \
314 ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
317 #define ubh_get_ucg(ubh) \
318 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
322 * Extract byte from ufs_buffer_head
323 * Extract the bits for a block from a map inside ufs_buffer_head
325 #define ubh_get_addr8(ubh,begin) \
326 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
327 ((begin) & ~uspi->s_fmask))
329 #define ubh_get_addr16(ubh,begin) \
330 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
331 ((begin) & ((uspi->fsize>>1) - 1)))
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)))
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)))
341 #define ubh_get_addr ubh_get_addr8
343 static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
344 struct ufs_buffer_head *ubh,
347 if (uspi->fs_magic == UFS2_MAGIC)
348 return ubh_get_addr64(ubh, blk);
350 return ubh_get_addr32(ubh, blk);
353 #define ubh_blkmap(ubh,begin,bit) \
354 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
357 * Determine the number of available frags given a
358 * percentage to hold in reserve.
361 ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
363 return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
364 uspi->cs_total.cs_nffree -
365 (uspi->s_dsize * (percentreserved) / 100);
369 * Macros to access cylinder group array structures
371 #define ubh_cg_blktot(ucpi,cylno) \
372 (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
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 ))))
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.
386 #define ubh_setbit(ubh,begin,bit) \
387 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
389 #define ubh_clrbit(ubh,begin,bit) \
390 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
392 #define ubh_isset(ubh,begin,bit) \
393 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
395 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
397 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
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)
404 unsigned base, count, pos;
409 base = offset >> uspi->s_bpfshift;
410 offset &= uspi->s_bpfmask;
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)
420 return (base << uspi->s_bpfshift) + pos - begin;
423 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
424 unsigned size, unsigned offset)
427 unsigned char * mapp;
430 mapp = bitmap + (size >> 3);
432 bit = 1 << (size & 7);
433 for (i = size; i > offset; i--) {
434 if ((map & bit) == 0)
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)
451 unsigned base, count, pos, size;
456 base = start >> uspi->s_bpfshift;
457 start &= uspi->s_bpfmask;
459 count = min_t(unsigned int,
460 size + (uspi->s_bpf - start), uspi->s_bpf)
461 - (uspi->s_bpf - start);
463 pos = find_last_zero_bit (ubh->bh[base]->b_data,
464 start, start - count);
465 if (pos > start - count || !size)
470 return (base << uspi->s_bpfshift) + pos - begin;
473 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
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)
479 switch (uspi->s_fpb) {
481 return (*ubh_get_addr (ubh, begin + block) == 0xff);
483 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
485 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
487 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
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)
496 switch (uspi->s_fpb) {
498 *ubh_get_addr (ubh, begin + block) = 0x00;
501 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
504 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
507 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
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)
516 switch (uspi->s_fpb) {
518 *ubh_get_addr(ubh, begin + block) = 0xff;
521 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
524 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
527 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
532 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
533 __fs32 * fraglist, int cnt)
535 struct ufs_sb_private_info * uspi;
536 unsigned fragsize, pos;
538 uspi = UFS_SB(sb)->s_uspi;
541 for (pos = 0; pos < uspi->s_fpb; pos++) {
542 if (blockmap & (1 << pos)) {
545 else if (fragsize > 0) {
546 fs32_add(sb, &fraglist[fragsize], cnt);
550 if (fragsize > 0 && fragsize < uspi->s_fpb)
551 fs32_add(sb, &fraglist[fragsize], cnt);
554 static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
555 struct ufs_inode_info *ufsi,
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];
564 static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
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);
571 static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
573 if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
574 *(__fs64 *)p = cpu_to_fs64(sb, val);
576 *(__fs32 *)p = cpu_to_fs32(sb, val);
579 static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
582 if (uspi->fs_magic == UFS2_MAGIC)
588 static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
591 if (uspi->fs_magic == UFS2_MAGIC)
592 return *(__fs64 *)p == 0;
594 return *(__fs32 *)p == 0;