5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
16 #define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
19 * macros used for retyping
21 #define UCPI_UBH ((struct ufs_buffer_head *)ucpi)
22 #define USPI_UBH ((struct ufs_buffer_head *)uspi)
27 * macros used for accesing structures
30 ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
31 struct ufs_super_block_third *usb3)
33 switch (sb->u.ufs_sb.s_flags & UFS_ST_MASK) {
35 return fs32_to_cpu(sb, usb3->fs_u2.fs_sun.fs_state);
37 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
40 return fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_state);
45 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
46 struct ufs_super_block_third *usb3, s32 value)
48 switch (sb->u.ufs_sb.s_flags & UFS_ST_MASK) {
50 usb3->fs_u2.fs_sun.fs_state = cpu_to_fs32(sb, value);
53 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
56 usb3->fs_u2.fs_44.fs_state = cpu_to_fs32(sb, value);
62 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
63 struct ufs_super_block_third *usb3)
65 if ((sb->u.ufs_sb.s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
66 return fs32_to_cpu(sb, usb3->fs_u2.fs_sunx86.fs_npsect);
68 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
72 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
76 switch (sb->u.ufs_sb.s_flags & UFS_ST_MASK) {
78 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qbmask[0];
79 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qbmask[1];
82 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qbmask[0];
83 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qbmask[1];
86 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qbmask[0];
87 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qbmask[1];
91 return fs64_to_cpu(sb, tmp);
95 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
99 switch (sb->u.ufs_sb.s_flags & UFS_ST_MASK) {
101 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qfmask[0];
102 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qfmask[1];
105 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qfmask[0];
106 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qfmask[1];
109 ((u32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qfmask[0];
110 ((u32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qfmask[1];
114 return fs64_to_cpu(sb, tmp);
118 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
120 if ((sb->u.ufs_sb.s_flags & UFS_DE_MASK) == UFS_DE_OLD)
121 return fs16_to_cpu(sb, de->d_u.d_namlen);
123 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
127 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
129 if ((sb->u.ufs_sb.s_flags & UFS_DE_MASK) == UFS_DE_OLD)
130 de->d_u.d_namlen = cpu_to_fs16(sb, value);
132 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
136 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
138 if ((sb->u.ufs_sb.s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
142 * TODO turn this into a table lookup
144 switch (mode & S_IFMT) {
146 de->d_u.d_44.d_type = DT_SOCK;
149 de->d_u.d_44.d_type = DT_LNK;
152 de->d_u.d_44.d_type = DT_REG;
155 de->d_u.d_44.d_type = DT_BLK;
158 de->d_u.d_44.d_type = DT_DIR;
161 de->d_u.d_44.d_type = DT_CHR;
164 de->d_u.d_44.d_type = DT_FIFO;
167 de->d_u.d_44.d_type = DT_UNKNOWN;
172 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
174 switch (sb->u.ufs_sb.s_flags & UFS_UID_MASK) {
176 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
178 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
180 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
185 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
187 switch (sb->u.ufs_sb.s_flags & UFS_UID_MASK) {
189 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
192 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
195 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
199 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
201 switch (sb->u.ufs_sb.s_flags & UFS_UID_MASK) {
203 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
205 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
207 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
212 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
214 switch (sb->u.ufs_sb.s_flags & UFS_UID_MASK) {
216 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
219 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
222 inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
227 * These functions manipulate ufs buffers
229 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
230 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, unsigned, unsigned);
231 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, unsigned, unsigned);
232 extern void ubh_brelse (struct ufs_buffer_head *);
233 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
234 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
235 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
236 extern void ubh_ll_rw_block (int, unsigned, struct ufs_buffer_head **);
237 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
238 extern unsigned ubh_max_bcount (struct ufs_buffer_head *);
239 extern void ubh_bforget (struct ufs_buffer_head *);
240 extern int ubh_buffer_dirty (struct ufs_buffer_head *);
241 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
242 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
243 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
244 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
249 * macros to get important structures from ufs_buffer_head
251 #define ubh_get_usb_first(ubh) \
252 ((struct ufs_super_block_first *)((ubh)->bh[0]->b_data))
254 #define ubh_get_usb_second(ubh) \
255 ((struct ufs_super_block_second *)(ubh)-> \
256 bh[UFS_SECTOR_SIZE >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE & ~uspi->s_fmask))
258 #define ubh_get_usb_third(ubh) \
259 ((struct ufs_super_block_third *)((ubh)-> \
260 bh[UFS_SECTOR_SIZE*2 >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE*2 & ~uspi->s_fmask)))
262 #define ubh_get_ucg(ubh) \
263 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
267 * Extract byte from ufs_buffer_head
268 * Extract the bits for a block from a map inside ufs_buffer_head
270 #define ubh_get_addr8(ubh,begin) \
271 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
272 ((begin) & ~uspi->s_fmask))
274 #define ubh_get_addr16(ubh,begin) \
275 (((u16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
276 ((begin) & (uspi->fsize>>1) - 1)))
278 #define ubh_get_addr32(ubh,begin) \
279 (((u32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
280 ((begin) & ((uspi->s_fsize>>2) - 1)))
282 #define ubh_get_addr ubh_get_addr8
284 #define ubh_blkmap(ubh,begin,bit) \
285 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
289 * Macros for access to superblock array structures
291 #define ubh_postbl(ubh,cylno,i) \
292 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
293 ? (*(__s16*)(ubh_get_addr(ubh, \
294 (unsigned)(&((struct ufs_super_block *)0)->fs_opostbl) \
295 + (((cylno) * 16 + (i)) << 1) ) )) \
296 : (*(__s16*)(ubh_get_addr(ubh, \
297 uspi->s_postbloff + (((cylno) * uspi->s_nrpos + (i)) << 1) ))))
299 #define ubh_rotbl(ubh,i) \
300 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
301 ? (*(__u8*)(ubh_get_addr(ubh, \
302 (unsigned)(&((struct ufs_super_block *)0)->fs_space) + (i)))) \
303 : (*(__u8*)(ubh_get_addr(ubh, uspi->s_rotbloff + (i)))))
306 * Determine the number of available frags given a
307 * percentage to hold in reserve.
309 #define ufs_freespace(usb, percentreserved) \
310 (ufs_blkstofrags(fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nbfree)) + \
311 fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nffree) - (uspi->s_dsize * (percentreserved) / 100))
314 * Macros to access cylinder group array structures
316 #define ubh_cg_blktot(ucpi,cylno) \
317 (*((__u32*)ubh_get_addr(UCPI_UBH, (ucpi)->c_btotoff + ((cylno) << 2))))
319 #define ubh_cg_blks(ucpi,cylno,rpos) \
320 (*((__u16*)ubh_get_addr(UCPI_UBH, \
321 (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
325 * These functions work like classical bitmap operations.
326 * The difference is that we don't have the whole bitmap
327 * in one contiguous chunk of memory, but in several buffers.
328 * The parameters of each function are super_block, ufs_buffer_head and
329 * position of the beginning of the bitmap.
331 #define ubh_setbit(ubh,begin,bit) \
332 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
334 #define ubh_clrbit(ubh,begin,bit) \
335 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
337 #define ubh_isset(ubh,begin,bit) \
338 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
340 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
342 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
344 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
345 static inline unsigned _ubh_find_next_zero_bit_(
346 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
347 unsigned begin, unsigned size, unsigned offset)
349 unsigned base, count, pos;
354 base = offset >> uspi->s_bpfshift;
355 offset &= uspi->s_bpfmask;
357 count = min_t(unsigned int, size + offset, uspi->s_bpf);
358 size -= count - offset;
359 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
360 if (pos < count || !size)
365 return (base << uspi->s_bpfshift) + pos - begin;
368 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
369 unsigned size, unsigned offset)
372 unsigned char * mapp;
375 mapp = bitmap + (size >> 3);
377 bit = 1 << (size & 7);
378 for (i = size; i > offset; i--) {
379 if ((map & bit) == 0)
391 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
392 static inline unsigned _ubh_find_last_zero_bit_(
393 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
394 unsigned begin, unsigned start, unsigned end)
396 unsigned base, count, pos, size;
401 base = start >> uspi->s_bpfshift;
402 start &= uspi->s_bpfmask;
404 count = min_t(unsigned int,
405 size + (uspi->s_bpf - start), uspi->s_bpf)
406 - (uspi->s_bpf - start);
408 pos = find_last_zero_bit (ubh->bh[base]->b_data,
409 start, start - count);
410 if (pos > start - count || !size)
415 return (base << uspi->s_bpfshift) + pos - begin;
418 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
420 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
421 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
422 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
424 switch (uspi->s_fpb) {
426 return (*ubh_get_addr (ubh, begin + block) == 0xff);
428 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
430 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
432 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
437 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
438 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
439 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
441 switch (uspi->s_fpb) {
443 *ubh_get_addr (ubh, begin + block) = 0x00;
446 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
449 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
452 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
457 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
458 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
459 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
461 switch (uspi->s_fpb) {
463 *ubh_get_addr(ubh, begin + block) = 0xff;
466 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
469 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
472 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
477 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
478 unsigned * fraglist, int cnt)
480 struct ufs_sb_private_info * uspi;
481 unsigned fragsize, pos;
483 uspi = sb->u.ufs_sb.s_uspi;
486 for (pos = 0; pos < uspi->s_fpb; pos++) {
487 if (blockmap & (1 << pos)) {
490 else if (fragsize > 0) {
491 fs32_add(sb, &fraglist[fragsize], cnt);
495 if (fragsize > 0 && fragsize < uspi->s_fpb)
496 fs32_add(sb, &fraglist[fragsize], cnt);
499 #define ubh_scanc(ubh,begin,size,table,mask) _ubh_scanc_(uspi,ubh,begin,size,table,mask)
500 static inline unsigned _ubh_scanc_(struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
501 unsigned begin, unsigned size, unsigned char * table, unsigned char mask)
503 unsigned rest, offset;
507 offset = begin & ~uspi->s_fmask;
508 begin >>= uspi->s_fshift;
510 if ((offset + size) < uspi->s_fsize)
513 rest = uspi->s_fsize - offset;
515 cp = ubh->bh[begin]->b_data + offset;
516 while ((table[*cp++] & mask) == 0 && --rest);
522 return (size + rest);