/* * linux/fs/ufs/balloc.c * * Copyright (C) 1998 * Daniel Pirkl * Charles University, Faculty of Mathematics and Physics */ #include #include #include #include #include #include #include #include #include #include "swab.h" #include "util.h" #undef UFS_BALLOC_DEBUG #ifdef UFS_BALLOC_DEBUG #define UFSD(x) printk("(%s, %d), %s:", __FILE__, __LINE__, __FUNCTION__); printk x; #else #define UFSD(x) #endif unsigned ufs_add_fragments (struct inode *, unsigned, unsigned, unsigned, int *); unsigned ufs_alloc_fragments (struct inode *, unsigned, unsigned, unsigned, int *); unsigned ufs_alloccg_block (struct inode *, struct ufs_cg_private_info *, unsigned, int *); unsigned ufs_bitmap_search (struct super_block *, struct ufs_cg_private_info *, unsigned, unsigned); static unsigned char ufs_fragtable_8fpb[], ufs_fragtable_other[]; void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, unsigned, int); /* * Free 'count' fragments from fragment number 'fragment' */ void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cg_private_info * ucpi; struct ufs_cylinder_group * ucg; unsigned cgno, bit, end_bit, bbase, blkmap, i, blkno, cylno; unsigned swab; sb = inode->i_sb; uspi = sb->u.ufs_sb.s_uspi; swab = sb->u.ufs_sb.s_swab; usb1 = ubh_get_usb_first(USPI_UBH); UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) if (ufs_fragnum(fragment) + count > uspi->s_fpg) ufs_error (sb, "ufs_free_fragments", "internal error"); lock_super(sb); cgno = ufs_dtog(fragment); bit = ufs_dtogd(fragment); if (cgno >= uspi->s_ncg) { ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device"); goto failed; } ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) goto failed; ucg = ubh_get_ucg (UCPI_UBH); if (!ufs_cg_chkmagic (ucg)) { ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno); goto failed; } end_bit = bit + count; bbase = ufs_blknum (bit); blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1); for (i = bit; i < end_bit; i++) { if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, i)) ubh_setbit (UCPI_UBH, ucpi->c_freeoff, i); else ufs_error (sb, "ufs_free_fragments", "bit already cleared for fragment %u", i); } DQUOT_FREE_BLOCK (sb, inode, count); ADD_SWAB32(ucg->cg_cs.cs_nffree, count); ADD_SWAB32(usb1->fs_cstotal.cs_nffree, count); ADD_SWAB32(sb->fs_cs(cgno).cs_nffree, count); blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1); /* * Trying to reassemble free fragments into block */ blkno = ufs_fragstoblks (bbase); if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) { SUB_SWAB32(ucg->cg_cs.cs_nffree, uspi->s_fpb); SUB_SWAB32(usb1->fs_cstotal.cs_nffree, uspi->s_fpb); SUB_SWAB32(sb->fs_cs(cgno).cs_nffree, uspi->s_fpb); if ((sb->u.ufs_sb.s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, 1); INC_SWAB32(ucg->cg_cs.cs_nbfree); INC_SWAB32(usb1->fs_cstotal.cs_nbfree); INC_SWAB32(sb->fs_cs(cgno).cs_nbfree); cylno = ufs_cbtocylno (bbase); INC_SWAB16(ubh_cg_blks (ucpi, cylno, ufs_cbtorpos(bbase))); INC_SWAB32(ubh_cg_blktot (ucpi, cylno)); } ubh_mark_buffer_dirty (USPI_UBH, 1); ubh_mark_buffer_dirty (UCPI_UBH, 1); if (sb->s_flags & MS_SYNCHRONOUS) { ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); ubh_wait_on_buffer (UCPI_UBH); } sb->s_dirt = 1; unlock_super (sb); UFSD(("EXIT\n")) return; failed: unlock_super (sb); UFSD(("EXIT (FAILED)\n")) return; } /* * Free 'count' fragments from fragment number 'fragment' (free whole blocks) */ void ufs_free_blocks (struct inode * inode, unsigned fragment, unsigned count) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cg_private_info * ucpi; struct ufs_cylinder_group * ucg; unsigned overflow, cgno, bit, end_bit, blkno, i, cylno; unsigned swab; sb = inode->i_sb; uspi = sb->u.ufs_sb.s_uspi; swab = sb->u.ufs_sb.s_swab; usb1 = ubh_get_usb_first(USPI_UBH); UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) { ufs_error (sb, "ufs_free_blocks", "internal error, " "fragment %u, count %u\n", fragment, count); goto failed; } lock_super(sb); do_more: overflow = 0; cgno = ufs_dtog (fragment); bit = ufs_dtogd (fragment); if (cgno >= uspi->s_ncg) { ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device"); goto failed; } end_bit = bit + count; if (end_bit > uspi->s_fpg) { overflow = bit + count - uspi->s_fpg; count -= overflow; end_bit -= overflow; } ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) goto failed; ucg = ubh_get_ucg (UCPI_UBH); if (!ufs_cg_chkmagic (ucg)) { ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno); goto failed; } for (i = bit; i < end_bit; i += uspi->s_fpb) { blkno = ufs_fragstoblks(i); if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) { ufs_error(sb, "ufs_free_blocks", "freeing free fragment"); } ubh_setblock(UCPI_UBH, ucpi->c_freeoff, blkno); if ((sb->u.ufs_sb.s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, 1); DQUOT_FREE_BLOCK(sb, inode, uspi->s_fpb); INC_SWAB32(ucg->cg_cs.cs_nbfree); INC_SWAB32(usb1->fs_cstotal.cs_nbfree); INC_SWAB32(sb->fs_cs(cgno).cs_nbfree); cylno = ufs_cbtocylno(i); INC_SWAB16(ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(i))); INC_SWAB32(ubh_cg_blktot(ucpi, cylno)); } ubh_mark_buffer_dirty (USPI_UBH, 1); ubh_mark_buffer_dirty (UCPI_UBH, 1); if (sb->s_flags & MS_SYNCHRONOUS) { ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); ubh_wait_on_buffer (UCPI_UBH); } if (overflow) { fragment += count; count = overflow; goto do_more; } sb->s_dirt = 1; unlock_super (sb); UFSD(("EXIT\n")) return; failed: unlock_super (sb); UFSD(("EXIT (FAILED)\n")) return; } #define NULLIFY_FRAGMENTS \ for (i = oldcount; i < newcount; i++) { \ bh = getblk (sb->s_dev, result + i, sb->s_blocksize); \ memset (bh->b_data, 0, sb->s_blocksize); \ mark_buffer_uptodate(bh, 1); \ mark_buffer_dirty (bh, 1); \ if (IS_SYNC(inode)) { \ ll_rw_block (WRITE, 1, &bh); \ wait_on_buffer (bh); \ } \ brelse (bh); \ } unsigned ufs_new_fragments (struct inode * inode, u32 * p, unsigned fragment, unsigned goal, unsigned count, int * err ) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct buffer_head * bh; unsigned cgno, oldcount, newcount, tmp, request, i, result; unsigned swab; UFSD(("ENTER, ino %lu, fragment %u, goal %u, count %u\n", inode->i_ino, fragment, goal, count)) sb = inode->i_sb; swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); *err = -ENOSPC; lock_super (sb); tmp = SWAB32(*p); if (count + ufs_fragnum(fragment) > uspi->s_fpb) { ufs_warning (sb, "ufs_new_fragments", "internal warning" " fragment %u, count %u", fragment, count); count = uspi->s_fpb - ufs_fragnum(fragment); } oldcount = ufs_fragnum (fragment); newcount = oldcount + count; /* * Somebody else has just allocated our fragments */ if (oldcount) { if (!tmp) { ufs_error (sb, "ufs_new_fragments", "internal error, " "fragment %u, tmp %u\n", fragment, tmp); return (unsigned)-1; } if (fragment < inode->u.ufs_i.i_lastfrag) { UFSD(("EXIT (ALREADY ALLOCATED)\n")) unlock_super (sb); return 0; } } else { if (tmp) { UFSD(("EXIT (ALREADY ALLOCATED)\n")) unlock_super(sb); return 0; } } /* * There is not enough space for user on the device */ if (!fsuser() && ufs_freespace(usb1, UFS_MINFREE) <= 0) { unlock_super (sb); UFSD(("EXIT (FAILED)\n")) return 0; } if (goal >= uspi->s_size) goal = 0; if (goal == 0) cgno = ufs_inotocg (inode->i_ino); else cgno = ufs_dtog (goal); /* * allocate new fragment */ if (oldcount == 0) { result = ufs_alloc_fragments (inode, cgno, goal, count, err); if (result) { *p = SWAB32(result); *err = 0; inode->i_blocks += count << uspi->s_nspfshift; inode->u.ufs_i.i_lastfrag = max (inode->u.ufs_i.i_lastfrag, fragment + count); NULLIFY_FRAGMENTS } unlock_super(sb); UFSD(("EXIT, result %u\n", result)) return result; } /* * resize block */ result = ufs_add_fragments (inode, tmp, oldcount, newcount, err); if (result) { *err = 0; inode->i_blocks += count << uspi->s_nspfshift; inode->u.ufs_i.i_lastfrag = max (inode->u.ufs_i.i_lastfrag, fragment + count); NULLIFY_FRAGMENTS unlock_super(sb); UFSD(("EXIT, result %u\n", result)) return result; } /* * allocate new block and move data */ switch (SWAB32(usb1->fs_optim)) { case UFS_OPTSPACE: request = newcount; if (uspi->s_minfree < 5 || SWAB32(usb1->fs_cstotal.cs_nffree) > uspi->s_dsize * uspi->s_minfree / (2 * 100) ) break; usb1->fs_optim = SWAB32(UFS_OPTTIME); break; default: usb1->fs_optim = SWAB32(UFS_OPTTIME); case UFS_OPTTIME: request = uspi->s_fpb; if (SWAB32(usb1->fs_cstotal.cs_nffree) < uspi->s_dsize * (uspi->s_minfree - 2) / 100) break; usb1->fs_optim = SWAB32(UFS_OPTSPACE); break; } result = ufs_alloc_fragments (inode, cgno, goal, request, err); if (result) { for (i = 0; i < oldcount; i++) { bh = bread (sb->s_dev, tmp + i, sb->s_blocksize); if(bh) { mark_buffer_clean (bh); bh->b_blocknr = result + i; mark_buffer_dirty (bh, 0); if (IS_SYNC(inode)) { ll_rw_block (WRITE, 1, &bh); wait_on_buffer (bh); } brelse (bh); } else { printk(KERN_ERR "ufs_new_fragments: bread fail\n"); return 0; } } *p = SWAB32(result); *err = 0; inode->i_blocks += count << uspi->s_nspfshift; inode->u.ufs_i.i_lastfrag = max (inode->u.ufs_i.i_lastfrag, fragment + count); NULLIFY_FRAGMENTS unlock_super(sb); if (newcount < request) ufs_free_fragments (inode, result + newcount, request - newcount); ufs_free_fragments (inode, tmp, oldcount); UFSD(("EXIT, result %u\n", result)) return result; } unlock_super(sb); UFSD(("EXIT (FAILED)\n")) return 0; } unsigned ufs_add_fragments (struct inode * inode, unsigned fragment, unsigned oldcount, unsigned newcount, int * err) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cg_private_info * ucpi; struct ufs_cylinder_group * ucg; unsigned cgno, fragno, fragoff, count, fragsize, i; unsigned swab; UFSD(("ENTER, fragment %u, oldcount %u, newcount %u\n", fragment, oldcount, newcount)) sb = inode->i_sb; swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first (USPI_UBH); count = newcount - oldcount; cgno = ufs_dtog(fragment); if (sb->fs_cs(cgno).cs_nffree < count) return 0; if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb) return 0; ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) return 0; ucg = ubh_get_ucg (UCPI_UBH); if (!ufs_cg_chkmagic(ucg)) { ufs_panic (sb, "ufs_add_fragments", "internal error, bad magic number on cg %u", cgno); return 0; } fragno = ufs_dtogd (fragment); fragoff = ufs_fragnum (fragno); for (i = oldcount; i < newcount; i++) if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) return 0; /* * Block can be extended */ ucg->cg_time = SWAB32(CURRENT_TIME); for (i = newcount; i < (uspi->s_fpb - fragoff); i++) if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) break; fragsize = i - oldcount; if (!SWAB32(ucg->cg_frsum[fragsize])) ufs_panic (sb, "ufs_add_fragments", "internal error or corrupted bitmap on cg %u", cgno); DEC_SWAB32(ucg->cg_frsum[fragsize]); if (fragsize != count) INC_SWAB32(ucg->cg_frsum[fragsize - count]); for (i = oldcount; i < newcount; i++) ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, fragno + i); if(DQUOT_ALLOC_BLOCK(sb, inode, count)) { *err = -EDQUOT; return 0; } SUB_SWAB32(ucg->cg_cs.cs_nffree, count); SUB_SWAB32(sb->fs_cs(cgno).cs_nffree, count); SUB_SWAB32(usb1->fs_cstotal.cs_nffree, count); ubh_mark_buffer_dirty (USPI_UBH, 1); ubh_mark_buffer_dirty (UCPI_UBH, 1); if (sb->s_flags & MS_SYNCHRONOUS) { ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); ubh_wait_on_buffer (UCPI_UBH); } sb->s_dirt = 1; UFSD(("EXIT, fragment %u\n", fragment)) return fragment; } #define UFS_TEST_FREE_SPACE_CG \ ucg = (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[cgno]->b_data; \ if (SWAB32(ucg->cg_cs.cs_nbfree)) \ goto cg_found; \ for (k = count; k < uspi->s_fpb; k++) \ if (SWAB32(ucg->cg_frsum[k])) \ goto cg_found; unsigned ufs_alloc_fragments (struct inode * inode, unsigned cgno, unsigned goal, unsigned count, int * err) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cg_private_info * ucpi; struct ufs_cylinder_group * ucg; unsigned oldcg, i, j, k, result, allocsize; unsigned swab; UFSD(("ENTER, ino %lu, cgno %u, goal %u, count %u\n", inode->i_ino, cgno, goal, count)) sb = inode->i_sb; swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); oldcg = cgno; /* * 1. searching on preferred cylinder group */ UFS_TEST_FREE_SPACE_CG /* * 2. quadratic rehash */ for (j = 1; j < uspi->s_ncg; j *= 2) { cgno += j; if (cgno >= uspi->s_ncg) cgno -= uspi->s_ncg; UFS_TEST_FREE_SPACE_CG } /* * 3. brute force search * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step ) */ cgno = (oldcg + 1) % uspi->s_ncg; for (j = 2; j < uspi->s_ncg; j++) { cgno++; if (cgno >= uspi->s_ncg) cgno = 0; UFS_TEST_FREE_SPACE_CG } UFSD(("EXIT (FAILED)\n")) return 0; cg_found: ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) return 0; ucg = ubh_get_ucg (UCPI_UBH); if (!ufs_cg_chkmagic(ucg)) ufs_panic (sb, "ufs_alloc_fragments", "internal error, bad magic number on cg %u", cgno); ucg->cg_time = SWAB32(CURRENT_TIME); if (count == uspi->s_fpb) { result = ufs_alloccg_block (inode, ucpi, goal, err); if (result == (unsigned)-1) return 0; goto succed; } for (allocsize = count; allocsize < uspi->s_fpb; allocsize++) if (SWAB32(ucg->cg_frsum[allocsize]) != 0) break; if (allocsize == uspi->s_fpb) { result = ufs_alloccg_block (inode, ucpi, goal, err); if (result == (unsigned)-1) return 0; goal = ufs_dtogd (result); for (i = count; i < uspi->s_fpb; i++) ubh_setbit (UCPI_UBH, ucpi->c_freeoff, goal + i); i = uspi->s_fpb - count; DQUOT_FREE_BLOCK(sb, inode, i); ADD_SWAB32(ucg->cg_cs.cs_nffree, i); ADD_SWAB32(usb1->fs_cstotal.cs_nffree, i); ADD_SWAB32(sb->fs_cs(cgno).cs_nffree, i); INC_SWAB32(ucg->cg_frsum[i]); goto succed; } result = ufs_bitmap_search (sb, ucpi, goal, allocsize); if (result == (unsigned)-1) return 0; if(DQUOT_ALLOC_BLOCK(sb, inode, count)) { *err = -EDQUOT; return 0; } for (i = 0; i < count; i++) ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, result + i); SUB_SWAB32(ucg->cg_cs.cs_nffree, count); SUB_SWAB32(usb1->fs_cstotal.cs_nffree, count); SUB_SWAB32(sb->fs_cs(cgno).cs_nffree, count); DEC_SWAB32(ucg->cg_frsum[allocsize]); if (count != allocsize) INC_SWAB32(ucg->cg_frsum[allocsize - count]); succed: ubh_mark_buffer_dirty (USPI_UBH, 1); ubh_mark_buffer_dirty (UCPI_UBH, 1); if (sb->s_flags & MS_SYNCHRONOUS) { ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi); ubh_wait_on_buffer (UCPI_UBH); } sb->s_dirt = 1; result += cgno * uspi->s_fpg; UFSD(("EXIT3, result %u\n", result)) return result; } unsigned ufs_alloccg_block (struct inode * inode, struct ufs_cg_private_info * ucpi, unsigned goal, int * err) { struct super_block * sb; struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cylinder_group * ucg; unsigned result, cylno, blkno; unsigned swab; UFSD(("ENTER, goal %u\n", goal)) sb = inode->i_sb; swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); ucg = ubh_get_ucg(UCPI_UBH); if (goal == 0) { goal = ucpi->c_rotor; goto norot; } goal = ufs_blknum (goal); goal = ufs_dtogd (goal); /* * If the requested block is available, use it. */ if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, ufs_fragstoblks(goal))) { result = goal; goto gotit; } norot: result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb); if (result == (unsigned)-1) return (unsigned)-1; ucpi->c_rotor = result; gotit: blkno = ufs_fragstoblks(result); ubh_clrblock (UCPI_UBH, ucpi->c_freeoff, blkno); if ((sb->u.ufs_sb.s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, -1); if(DQUOT_ALLOC_BLOCK(sb, inode, uspi->s_fpb)) { *err = -EDQUOT; return (unsigned)-1; } DEC_SWAB32(ucg->cg_cs.cs_nbfree); DEC_SWAB32(usb1->fs_cstotal.cs_nbfree); DEC_SWAB32(sb->fs_cs(ucpi->c_cgx).cs_nbfree); cylno = ufs_cbtocylno(result); DEC_SWAB16(ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(result))); DEC_SWAB32(ubh_cg_blktot(ucpi, cylno)); UFSD(("EXIT, result %u\n", result)) return result; } unsigned ufs_bitmap_search (struct super_block * sb, struct ufs_cg_private_info * ucpi, unsigned goal, unsigned count) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_cylinder_group * ucg; unsigned start, length, location, result; unsigned possition, fragsize, blockmap, mask; unsigned swab; UFSD(("ENTER, cg %u, goal %u, count %u\n", ucpi->c_cgx, goal, count)) swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first (USPI_UBH); ucg = ubh_get_ucg(UCPI_UBH); if (goal) start = ufs_dtogd(goal) >> 3; else start = ucpi->c_frotor >> 3; length = howmany(uspi->s_fpg, 8) - start; location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff + start, length, (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other, 1 << (count - 1 + (uspi->s_fpb & 7))); if (location == 0) { length = start + 1; location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff, length, (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other, 1 << (count - 1 + (uspi->s_fpb & 7))); if (location == 0) { ufs_error (sb, "ufs_bitmap_search", "bitmap corrupted on cg %u, start %u, length %u, count %u, freeoff %u\n", ucpi->c_cgx, start, length, count, ucpi->c_freeoff); return (unsigned)-1; } start = 0; } result = (start + length - location) << 3; ucpi->c_frotor = result; /* * found the byte in the map */ blockmap = ubh_blkmap(UCPI_UBH, ucpi->c_freeoff, result); fragsize = 0; for (possition = 0, mask = 1; possition < 8; possition++, mask <<= 1) { if (blockmap & mask) { if (!(possition & uspi->s_fpbmask)) fragsize = 1; else fragsize++; } else { if (fragsize == count) { result += possition - count; UFSD(("EXIT, result %u\n", result)) return result; } fragsize = 0; } } if (fragsize == count) { result += possition - count; UFSD(("EXIT, result %u\n", result)) return result; } ufs_error (sb, "ufs_bitmap_search", "block not in map on cg %u\n", ucpi->c_cgx); UFSD(("EXIT (FAILED)\n")) return (unsigned)-1; } void ufs_clusteracct(struct super_block * sb, struct ufs_cg_private_info * ucpi, unsigned blkno, int cnt) { struct ufs_sb_private_info * uspi; int i, start, end, forw, back; unsigned swab; uspi = sb->u.ufs_sb.s_uspi; swab = sb->u.ufs_sb.s_swab; if (uspi->s_contigsumsize <= 0) return; if (cnt > 0) ubh_setbit(UCPI_UBH, ucpi->c_clusteroff, blkno); else ubh_clrbit(UCPI_UBH, ucpi->c_clusteroff, blkno); /* * Find the size of the cluster going forward. */ start = blkno + 1; end = start + uspi->s_contigsumsize; if ( end >= ucpi->c_nclusterblks) end = ucpi->c_nclusterblks; i = ubh_find_next_zero_bit (UCPI_UBH, ucpi->c_clusteroff, end, start); if (i > end) i = end; forw = i - start; /* * Find the size of the cluster going backward. */ start = blkno - 1; end = start - uspi->s_contigsumsize; if (end < 0 ) end = -1; i = ubh_find_last_zero_bit (UCPI_UBH, ucpi->c_clusteroff, start, end); if ( i < end) i = end; back = start - i; /* * Account for old cluster and the possibly new forward and * back clusters. */ i = back + forw + 1; if (i > uspi->s_contigsumsize) i = uspi->s_contigsumsize; ADD_SWAB32(*((u32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (i << 2))), cnt); if (back > 0) SUB_SWAB32(*((u32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (back << 2))), cnt); if (forw > 0) SUB_SWAB32(*((u32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (forw << 2))), cnt); } static unsigned char ufs_fragtable_8fpb[] = { 0x00, 0x01, 0x01, 0x02, 0x01, 0x01, 0x02, 0x04, 0x01, 0x01, 0x01, 0x03, 0x02, 0x03, 0x04, 0x08, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x02, 0x03, 0x03, 0x02, 0x04, 0x05, 0x08, 0x10, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x04, 0x05, 0x05, 0x06, 0x08, 0x09, 0x10, 0x20, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x08, 0x09, 0x09, 0x0A, 0x10, 0x11, 0x20, 0x40, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x05, 0x05, 0x05, 0x07, 0x09, 0x09, 0x11, 0x21, 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x02, 0x03, 0x03, 0x02, 0x06, 0x07, 0x0A, 0x12, 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x04, 0x0C, 0x08, 0x09, 0x09, 0x0A, 0x09, 0x09, 0x0A, 0x0C, 0x10, 0x11, 0x11, 0x12, 0x20, 0x21, 0x40, 0x80, }; static unsigned char ufs_fragtable_other[] = { 0x00, 0x16, 0x16, 0x2A, 0x16, 0x16, 0x26, 0x4E, 0x16, 0x16, 0x16, 0x3E, 0x2A, 0x3E, 0x4E, 0x8A, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x26, 0x36, 0x36, 0x2E, 0x36, 0x36, 0x26, 0x6E, 0x36, 0x36, 0x36, 0x3E, 0x2E, 0x3E, 0x6E, 0xAE, 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE, 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE, 0x8A, 0x9E, 0x9E, 0xAA, 0x9E, 0x9E, 0xAE, 0xCE, 0x9E, 0x9E, 0x9E, 0xBE, 0xAA, 0xBE, 0xCE, 0x8A, };