2 * linux/fs/ufs/balloc.c
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
10 #include <linux/ufs_fs.h>
11 #include <linux/stat.h>
12 #include <linux/time.h>
13 #include <linux/string.h>
14 #include <linux/quotaops.h>
15 #include <linux/buffer_head.h>
16 #include <linux/sched.h>
17 #include <linux/bitops.h>
18 #include <asm/byteorder.h>
23 #undef UFS_BALLOC_DEBUG
25 #ifdef UFS_BALLOC_DEBUG
26 #define UFSD(x) printk("(%s, %d), %s:", __FILE__, __LINE__, __FUNCTION__); printk x;
31 static unsigned ufs_add_fragments (struct inode *, unsigned, unsigned, unsigned, int *);
32 static unsigned ufs_alloc_fragments (struct inode *, unsigned, unsigned, unsigned, int *);
33 static unsigned ufs_alloccg_block (struct inode *, struct ufs_cg_private_info *, unsigned, int *);
34 static unsigned ufs_bitmap_search (struct super_block *, struct ufs_cg_private_info *, unsigned, unsigned);
35 static unsigned char ufs_fragtable_8fpb[], ufs_fragtable_other[];
36 static void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, unsigned, int);
39 * Free 'count' fragments from fragment number 'fragment'
41 void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) {
42 struct super_block * sb;
43 struct ufs_sb_private_info * uspi;
44 struct ufs_super_block_first * usb1;
45 struct ufs_cg_private_info * ucpi;
46 struct ufs_cylinder_group * ucg;
47 unsigned cgno, bit, end_bit, bbase, blkmap, i, blkno, cylno;
50 uspi = UFS_SB(sb)->s_uspi;
51 usb1 = ubh_get_usb_first(USPI_UBH);
53 UFSD(("ENTER, fragment %u, count %u\n", fragment, count))
55 if (ufs_fragnum(fragment) + count > uspi->s_fpg)
56 ufs_error (sb, "ufs_free_fragments", "internal error");
60 cgno = ufs_dtog(fragment);
61 bit = ufs_dtogd(fragment);
62 if (cgno >= uspi->s_ncg) {
63 ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
67 ucpi = ufs_load_cylinder (sb, cgno);
70 ucg = ubh_get_ucg (UCPI_UBH);
71 if (!ufs_cg_chkmagic(sb, ucg)) {
72 ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
76 end_bit = bit + count;
77 bbase = ufs_blknum (bit);
78 blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
79 ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
80 for (i = bit; i < end_bit; i++) {
81 if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, i))
82 ubh_setbit (UCPI_UBH, ucpi->c_freeoff, i);
83 else ufs_error (sb, "ufs_free_fragments",
84 "bit already cleared for fragment %u", i);
87 DQUOT_FREE_BLOCK (inode, count);
90 fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
91 fs32_add(sb, &usb1->fs_cstotal.cs_nffree, count);
92 fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
93 blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
94 ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
97 * Trying to reassemble free fragments into block
99 blkno = ufs_fragstoblks (bbase);
100 if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) {
101 fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
102 fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, uspi->s_fpb);
103 fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
104 if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
105 ufs_clusteracct (sb, ucpi, blkno, 1);
106 fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
107 fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1);
108 fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
109 cylno = ufs_cbtocylno (bbase);
110 fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(bbase)), 1);
111 fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
114 ubh_mark_buffer_dirty (USPI_UBH);
115 ubh_mark_buffer_dirty (UCPI_UBH);
116 if (sb->s_flags & MS_SYNCHRONOUS) {
117 ubh_wait_on_buffer (UCPI_UBH);
118 ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
119 ubh_wait_on_buffer (UCPI_UBH);
129 UFSD(("EXIT (FAILED)\n"))
134 * Free 'count' fragments from fragment number 'fragment' (free whole blocks)
136 void ufs_free_blocks (struct inode * inode, unsigned fragment, unsigned count) {
137 struct super_block * sb;
138 struct ufs_sb_private_info * uspi;
139 struct ufs_super_block_first * usb1;
140 struct ufs_cg_private_info * ucpi;
141 struct ufs_cylinder_group * ucg;
142 unsigned overflow, cgno, bit, end_bit, blkno, i, cylno;
145 uspi = UFS_SB(sb)->s_uspi;
146 usb1 = ubh_get_usb_first(USPI_UBH);
148 UFSD(("ENTER, fragment %u, count %u\n", fragment, count))
150 if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) {
151 ufs_error (sb, "ufs_free_blocks", "internal error, "
152 "fragment %u, count %u\n", fragment, count);
160 cgno = ufs_dtog (fragment);
161 bit = ufs_dtogd (fragment);
162 if (cgno >= uspi->s_ncg) {
163 ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device");
166 end_bit = bit + count;
167 if (end_bit > uspi->s_fpg) {
168 overflow = bit + count - uspi->s_fpg;
173 ucpi = ufs_load_cylinder (sb, cgno);
176 ucg = ubh_get_ucg (UCPI_UBH);
177 if (!ufs_cg_chkmagic(sb, ucg)) {
178 ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno);
182 for (i = bit; i < end_bit; i += uspi->s_fpb) {
183 blkno = ufs_fragstoblks(i);
184 if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) {
185 ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
187 ubh_setblock(UCPI_UBH, ucpi->c_freeoff, blkno);
188 if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
189 ufs_clusteracct (sb, ucpi, blkno, 1);
190 DQUOT_FREE_BLOCK(inode, uspi->s_fpb);
192 fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
193 fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1);
194 fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
195 cylno = ufs_cbtocylno(i);
196 fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(i)), 1);
197 fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
200 ubh_mark_buffer_dirty (USPI_UBH);
201 ubh_mark_buffer_dirty (UCPI_UBH);
202 if (sb->s_flags & MS_SYNCHRONOUS) {
203 ubh_wait_on_buffer (UCPI_UBH);
204 ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
205 ubh_wait_on_buffer (UCPI_UBH);
221 UFSD(("EXIT (FAILED)\n"))
227 #define NULLIFY_FRAGMENTS \
228 for (i = oldcount; i < newcount; i++) { \
229 bh = sb_getblk(sb, result + i); \
230 memset (bh->b_data, 0, sb->s_blocksize); \
231 set_buffer_uptodate(bh); \
232 mark_buffer_dirty (bh); \
233 if (IS_SYNC(inode)) \
234 sync_dirty_buffer(bh); \
238 unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment,
239 unsigned goal, unsigned count, int * err )
241 struct super_block * sb;
242 struct ufs_sb_private_info * uspi;
243 struct ufs_super_block_first * usb1;
244 struct buffer_head * bh;
245 unsigned cgno, oldcount, newcount, tmp, request, i, result;
247 UFSD(("ENTER, ino %lu, fragment %u, goal %u, count %u\n", inode->i_ino, fragment, goal, count))
250 uspi = UFS_SB(sb)->s_uspi;
251 usb1 = ubh_get_usb_first(USPI_UBH);
256 tmp = fs32_to_cpu(sb, *p);
257 if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
258 ufs_warning (sb, "ufs_new_fragments", "internal warning"
259 " fragment %u, count %u", fragment, count);
260 count = uspi->s_fpb - ufs_fragnum(fragment);
262 oldcount = ufs_fragnum (fragment);
263 newcount = oldcount + count;
266 * Somebody else has just allocated our fragments
270 ufs_error (sb, "ufs_new_fragments", "internal error, "
271 "fragment %u, tmp %u\n", fragment, tmp);
275 if (fragment < UFS_I(inode)->i_lastfrag) {
276 UFSD(("EXIT (ALREADY ALLOCATED)\n"))
283 UFSD(("EXIT (ALREADY ALLOCATED)\n"))
290 * There is not enough space for user on the device
292 if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(usb1, UFS_MINFREE) <= 0) {
294 UFSD(("EXIT (FAILED)\n"))
298 if (goal >= uspi->s_size)
301 cgno = ufs_inotocg (inode->i_ino);
303 cgno = ufs_dtog (goal);
306 * allocate new fragment
309 result = ufs_alloc_fragments (inode, cgno, goal, count, err);
311 *p = cpu_to_fs32(sb, result);
313 inode->i_blocks += count << uspi->s_nspfshift;
314 UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
318 UFSD(("EXIT, result %u\n", result))
325 result = ufs_add_fragments (inode, tmp, oldcount, newcount, err);
328 inode->i_blocks += count << uspi->s_nspfshift;
329 UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
332 UFSD(("EXIT, result %u\n", result))
337 * allocate new block and move data
339 switch (fs32_to_cpu(sb, usb1->fs_optim)) {
342 if (uspi->s_minfree < 5 || fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)
343 > uspi->s_dsize * uspi->s_minfree / (2 * 100) )
345 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
348 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
351 request = uspi->s_fpb;
352 if (fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree) < uspi->s_dsize *
353 (uspi->s_minfree - 2) / 100)
355 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
358 result = ufs_alloc_fragments (inode, cgno, goal, request, err);
360 for (i = 0; i < oldcount; i++) {
361 bh = sb_bread(sb, tmp + i);
364 clear_buffer_dirty(bh);
365 bh->b_blocknr = result + i;
366 mark_buffer_dirty (bh);
368 sync_dirty_buffer(bh);
373 printk(KERN_ERR "ufs_new_fragments: bread fail\n");
378 *p = cpu_to_fs32(sb, result);
380 inode->i_blocks += count << uspi->s_nspfshift;
381 UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
384 if (newcount < request)
385 ufs_free_fragments (inode, result + newcount, request - newcount);
386 ufs_free_fragments (inode, tmp, oldcount);
387 UFSD(("EXIT, result %u\n", result))
392 UFSD(("EXIT (FAILED)\n"))
397 ufs_add_fragments (struct inode * inode, unsigned fragment,
398 unsigned oldcount, unsigned newcount, int * err)
400 struct super_block * sb;
401 struct ufs_sb_private_info * uspi;
402 struct ufs_super_block_first * usb1;
403 struct ufs_cg_private_info * ucpi;
404 struct ufs_cylinder_group * ucg;
405 unsigned cgno, fragno, fragoff, count, fragsize, i;
407 UFSD(("ENTER, fragment %u, oldcount %u, newcount %u\n", fragment, oldcount, newcount))
410 uspi = UFS_SB(sb)->s_uspi;
411 usb1 = ubh_get_usb_first (USPI_UBH);
412 count = newcount - oldcount;
414 cgno = ufs_dtog(fragment);
415 if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count)
417 if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb)
419 ucpi = ufs_load_cylinder (sb, cgno);
422 ucg = ubh_get_ucg (UCPI_UBH);
423 if (!ufs_cg_chkmagic(sb, ucg)) {
424 ufs_panic (sb, "ufs_add_fragments",
425 "internal error, bad magic number on cg %u", cgno);
429 fragno = ufs_dtogd (fragment);
430 fragoff = ufs_fragnum (fragno);
431 for (i = oldcount; i < newcount; i++)
432 if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i))
435 * Block can be extended
437 ucg->cg_time = cpu_to_fs32(sb, get_seconds());
438 for (i = newcount; i < (uspi->s_fpb - fragoff); i++)
439 if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i))
441 fragsize = i - oldcount;
442 if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize]))
443 ufs_panic (sb, "ufs_add_fragments",
444 "internal error or corrupted bitmap on cg %u", cgno);
445 fs32_sub(sb, &ucg->cg_frsum[fragsize], 1);
446 if (fragsize != count)
447 fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1);
448 for (i = oldcount; i < newcount; i++)
449 ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, fragno + i);
450 if(DQUOT_ALLOC_BLOCK(inode, count)) {
455 fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
456 fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
457 fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count);
459 ubh_mark_buffer_dirty (USPI_UBH);
460 ubh_mark_buffer_dirty (UCPI_UBH);
461 if (sb->s_flags & MS_SYNCHRONOUS) {
462 ubh_wait_on_buffer (UCPI_UBH);
463 ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
464 ubh_wait_on_buffer (UCPI_UBH);
468 UFSD(("EXIT, fragment %u\n", fragment))
473 #define UFS_TEST_FREE_SPACE_CG \
474 ucg = (struct ufs_cylinder_group *) UFS_SB(sb)->s_ucg[cgno]->b_data; \
475 if (fs32_to_cpu(sb, ucg->cg_cs.cs_nbfree)) \
477 for (k = count; k < uspi->s_fpb; k++) \
478 if (fs32_to_cpu(sb, ucg->cg_frsum[k])) \
481 static unsigned ufs_alloc_fragments (struct inode * inode, unsigned cgno,
482 unsigned goal, unsigned count, int * err)
484 struct super_block * sb;
485 struct ufs_sb_private_info * uspi;
486 struct ufs_super_block_first * usb1;
487 struct ufs_cg_private_info * ucpi;
488 struct ufs_cylinder_group * ucg;
489 unsigned oldcg, i, j, k, result, allocsize;
491 UFSD(("ENTER, ino %lu, cgno %u, goal %u, count %u\n", inode->i_ino, cgno, goal, count))
494 uspi = UFS_SB(sb)->s_uspi;
495 usb1 = ubh_get_usb_first(USPI_UBH);
499 * 1. searching on preferred cylinder group
501 UFS_TEST_FREE_SPACE_CG
504 * 2. quadratic rehash
506 for (j = 1; j < uspi->s_ncg; j *= 2) {
508 if (cgno >= uspi->s_ncg)
510 UFS_TEST_FREE_SPACE_CG
514 * 3. brute force search
515 * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step )
517 cgno = (oldcg + 1) % uspi->s_ncg;
518 for (j = 2; j < uspi->s_ncg; j++) {
520 if (cgno >= uspi->s_ncg)
522 UFS_TEST_FREE_SPACE_CG
525 UFSD(("EXIT (FAILED)\n"))
529 ucpi = ufs_load_cylinder (sb, cgno);
532 ucg = ubh_get_ucg (UCPI_UBH);
533 if (!ufs_cg_chkmagic(sb, ucg))
534 ufs_panic (sb, "ufs_alloc_fragments",
535 "internal error, bad magic number on cg %u", cgno);
536 ucg->cg_time = cpu_to_fs32(sb, get_seconds());
538 if (count == uspi->s_fpb) {
539 result = ufs_alloccg_block (inode, ucpi, goal, err);
540 if (result == (unsigned)-1)
545 for (allocsize = count; allocsize < uspi->s_fpb; allocsize++)
546 if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0)
549 if (allocsize == uspi->s_fpb) {
550 result = ufs_alloccg_block (inode, ucpi, goal, err);
551 if (result == (unsigned)-1)
553 goal = ufs_dtogd (result);
554 for (i = count; i < uspi->s_fpb; i++)
555 ubh_setbit (UCPI_UBH, ucpi->c_freeoff, goal + i);
556 i = uspi->s_fpb - count;
557 DQUOT_FREE_BLOCK(inode, i);
559 fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
560 fs32_add(sb, &usb1->fs_cstotal.cs_nffree, i);
561 fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
562 fs32_add(sb, &ucg->cg_frsum[i], 1);
566 result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
567 if (result == (unsigned)-1)
569 if(DQUOT_ALLOC_BLOCK(inode, count)) {
573 for (i = 0; i < count; i++)
574 ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, result + i);
576 fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
577 fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count);
578 fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
579 fs32_sub(sb, &ucg->cg_frsum[allocsize], 1);
581 if (count != allocsize)
582 fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1);
585 ubh_mark_buffer_dirty (USPI_UBH);
586 ubh_mark_buffer_dirty (UCPI_UBH);
587 if (sb->s_flags & MS_SYNCHRONOUS) {
588 ubh_wait_on_buffer (UCPI_UBH);
589 ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
590 ubh_wait_on_buffer (UCPI_UBH);
594 result += cgno * uspi->s_fpg;
595 UFSD(("EXIT3, result %u\n", result))
599 static unsigned ufs_alloccg_block (struct inode * inode,
600 struct ufs_cg_private_info * ucpi, unsigned goal, int * err)
602 struct super_block * sb;
603 struct ufs_sb_private_info * uspi;
604 struct ufs_super_block_first * usb1;
605 struct ufs_cylinder_group * ucg;
606 unsigned result, cylno, blkno;
608 UFSD(("ENTER, goal %u\n", goal))
611 uspi = UFS_SB(sb)->s_uspi;
612 usb1 = ubh_get_usb_first(USPI_UBH);
613 ucg = ubh_get_ucg(UCPI_UBH);
616 goal = ucpi->c_rotor;
619 goal = ufs_blknum (goal);
620 goal = ufs_dtogd (goal);
623 * If the requested block is available, use it.
625 if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, ufs_fragstoblks(goal))) {
631 result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb);
632 if (result == (unsigned)-1)
634 ucpi->c_rotor = result;
636 blkno = ufs_fragstoblks(result);
637 ubh_clrblock (UCPI_UBH, ucpi->c_freeoff, blkno);
638 if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
639 ufs_clusteracct (sb, ucpi, blkno, -1);
640 if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) {
645 fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1);
646 fs32_sub(sb, &usb1->fs_cstotal.cs_nbfree, 1);
647 fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1);
648 cylno = ufs_cbtocylno(result);
649 fs16_sub(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(result)), 1);
650 fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1);
652 UFSD(("EXIT, result %u\n", result))
657 static unsigned ufs_bitmap_search (struct super_block * sb,
658 struct ufs_cg_private_info * ucpi, unsigned goal, unsigned count)
660 struct ufs_sb_private_info * uspi;
661 struct ufs_super_block_first * usb1;
662 struct ufs_cylinder_group * ucg;
663 unsigned start, length, location, result;
664 unsigned possition, fragsize, blockmap, mask;
666 UFSD(("ENTER, cg %u, goal %u, count %u\n", ucpi->c_cgx, goal, count))
668 uspi = UFS_SB(sb)->s_uspi;
669 usb1 = ubh_get_usb_first (USPI_UBH);
670 ucg = ubh_get_ucg(UCPI_UBH);
673 start = ufs_dtogd(goal) >> 3;
675 start = ucpi->c_frotor >> 3;
677 length = ((uspi->s_fpg + 7) >> 3) - start;
678 location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff + start, length,
679 (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other,
680 1 << (count - 1 + (uspi->s_fpb & 7)));
683 location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff, length,
684 (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other,
685 1 << (count - 1 + (uspi->s_fpb & 7)));
687 ufs_error (sb, "ufs_bitmap_search",
688 "bitmap corrupted on cg %u, start %u, length %u, count %u, freeoff %u\n",
689 ucpi->c_cgx, start, length, count, ucpi->c_freeoff);
694 result = (start + length - location) << 3;
695 ucpi->c_frotor = result;
698 * found the byte in the map
700 blockmap = ubh_blkmap(UCPI_UBH, ucpi->c_freeoff, result);
702 for (possition = 0, mask = 1; possition < 8; possition++, mask <<= 1) {
703 if (blockmap & mask) {
704 if (!(possition & uspi->s_fpbmask))
710 if (fragsize == count) {
711 result += possition - count;
712 UFSD(("EXIT, result %u\n", result))
718 if (fragsize == count) {
719 result += possition - count;
720 UFSD(("EXIT, result %u\n", result))
723 ufs_error (sb, "ufs_bitmap_search", "block not in map on cg %u\n", ucpi->c_cgx);
724 UFSD(("EXIT (FAILED)\n"))
728 static void ufs_clusteracct(struct super_block * sb,
729 struct ufs_cg_private_info * ucpi, unsigned blkno, int cnt)
731 struct ufs_sb_private_info * uspi;
732 int i, start, end, forw, back;
734 uspi = UFS_SB(sb)->s_uspi;
735 if (uspi->s_contigsumsize <= 0)
739 ubh_setbit(UCPI_UBH, ucpi->c_clusteroff, blkno);
741 ubh_clrbit(UCPI_UBH, ucpi->c_clusteroff, blkno);
744 * Find the size of the cluster going forward.
747 end = start + uspi->s_contigsumsize;
748 if ( end >= ucpi->c_nclusterblks)
749 end = ucpi->c_nclusterblks;
750 i = ubh_find_next_zero_bit (UCPI_UBH, ucpi->c_clusteroff, end, start);
756 * Find the size of the cluster going backward.
759 end = start - uspi->s_contigsumsize;
762 i = ubh_find_last_zero_bit (UCPI_UBH, ucpi->c_clusteroff, start, end);
768 * Account for old cluster and the possibly new forward and
772 if (i > uspi->s_contigsumsize)
773 i = uspi->s_contigsumsize;
774 fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (i << 2)), cnt);
776 fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (back << 2)), cnt);
778 fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (forw << 2)), cnt);
782 static unsigned char ufs_fragtable_8fpb[] = {
783 0x00, 0x01, 0x01, 0x02, 0x01, 0x01, 0x02, 0x04, 0x01, 0x01, 0x01, 0x03, 0x02, 0x03, 0x04, 0x08,
784 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x02, 0x03, 0x03, 0x02, 0x04, 0x05, 0x08, 0x10,
785 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
786 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x04, 0x05, 0x05, 0x06, 0x08, 0x09, 0x10, 0x20,
787 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
788 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11,
789 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A,
790 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x08, 0x09, 0x09, 0x0A, 0x10, 0x11, 0x20, 0x40,
791 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
792 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11,
793 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
794 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x05, 0x05, 0x05, 0x07, 0x09, 0x09, 0x11, 0x21,
795 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A,
796 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x02, 0x03, 0x03, 0x02, 0x06, 0x07, 0x0A, 0x12,
797 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x04, 0x0C,
798 0x08, 0x09, 0x09, 0x0A, 0x09, 0x09, 0x0A, 0x0C, 0x10, 0x11, 0x11, 0x12, 0x20, 0x21, 0x40, 0x80,
801 static unsigned char ufs_fragtable_other[] = {
802 0x00, 0x16, 0x16, 0x2A, 0x16, 0x16, 0x26, 0x4E, 0x16, 0x16, 0x16, 0x3E, 0x2A, 0x3E, 0x4E, 0x8A,
803 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
804 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
805 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA,
806 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
807 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
808 0x26, 0x36, 0x36, 0x2E, 0x36, 0x36, 0x26, 0x6E, 0x36, 0x36, 0x36, 0x3E, 0x2E, 0x3E, 0x6E, 0xAE,
809 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE,
810 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
811 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
812 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
813 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE,
814 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA,
815 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE,
816 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE,
817 0x8A, 0x9E, 0x9E, 0xAA, 0x9E, 0x9E, 0xAE, 0xCE, 0x9E, 0x9E, 0x9E, 0xBE, 0xAA, 0xBE, 0xCE, 0x8A,