diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2006-07-03 10:25:08 -0400 |
---|---|---|
committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-07-03 10:25:08 -0400 |
commit | 0a1340c185734a57fbf4775927966ad4a1347b02 (patch) | |
tree | d9ed8f0dd809a7c542a3356601125ea5b5aaa804 /fs/ufs/balloc.c | |
parent | af18ddb8864b096e3ed4732e2d4b21c956dcfe3a (diff) | |
parent | 29454dde27d8e340bb1987bad9aa504af7081eba (diff) |
Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
include/linux/kernel.h
Diffstat (limited to 'fs/ufs/balloc.c')
-rw-r--r-- | fs/ufs/balloc.c | 406 |
1 files changed, 233 insertions, 173 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c index 3ada9dcf55b..b01804baa12 100644 --- a/fs/ufs/balloc.c +++ b/fs/ufs/balloc.c @@ -21,14 +21,6 @@ #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 - static unsigned ufs_add_fragments (struct inode *, unsigned, unsigned, unsigned, int *); static unsigned ufs_alloc_fragments (struct inode *, unsigned, unsigned, unsigned, int *); static unsigned ufs_alloccg_block (struct inode *, struct ufs_cg_private_info *, unsigned, int *); @@ -39,7 +31,8 @@ static void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, /* * Free 'count' fragments from fragment number 'fragment' */ -void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) { +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; @@ -51,7 +44,7 @@ void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count uspi = UFS_SB(sb)->s_uspi; usb1 = ubh_get_usb_first(uspi); - UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) + 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"); @@ -68,7 +61,7 @@ void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) goto failed; - ucg = ubh_get_ucg (UCPI_UBH); + ucg = ubh_get_ucg (UCPI_UBH(ucpi)); if (!ufs_cg_chkmagic(sb, ucg)) { ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno); goto failed; @@ -76,11 +69,11 @@ void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count end_bit = bit + count; bbase = ufs_blknum (bit); - blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); + blkmap = ubh_blkmap (UCPI_UBH(ucpi), 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); + if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i)) + ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i); else ufs_error (sb, "ufs_free_fragments", "bit already cleared for fragment %u", i); @@ -90,51 +83,52 @@ void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count fs32_add(sb, &ucg->cg_cs.cs_nffree, count); - fs32_add(sb, &usb1->fs_cstotal.cs_nffree, count); + uspi->cs_total.cs_nffree += count; fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); - blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase); + blkmap = ubh_blkmap (UCPI_UBH(ucpi), 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)) { + if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) { fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb); - fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, uspi->s_fpb); + uspi->cs_total.cs_nffree -= uspi->s_fpb; fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb); if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, 1); fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); - fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1); + uspi->cs_total.cs_nbfree++; fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); cylno = ufs_cbtocylno (bbase); fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(bbase)), 1); fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); } - ubh_mark_buffer_dirty (USPI_UBH); - ubh_mark_buffer_dirty (UCPI_UBH); + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); if (sb->s_flags & MS_SYNCHRONOUS) { - ubh_ll_rw_block (SWRITE, 1, (struct ufs_buffer_head **)&ucpi); - ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); + ubh_wait_on_buffer (UCPI_UBH(ucpi)); } sb->s_dirt = 1; unlock_super (sb); - UFSD(("EXIT\n")) + UFSD("EXIT\n"); return; failed: unlock_super (sb); - UFSD(("EXIT (FAILED)\n")) + 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) { +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; @@ -146,7 +140,7 @@ void ufs_free_blocks (struct inode * inode, unsigned fragment, unsigned count) { uspi = UFS_SB(sb)->s_uspi; usb1 = ubh_get_usb_first(uspi); - UFSD(("ENTER, fragment %u, count %u\n", fragment, count)) + 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, " @@ -162,7 +156,7 @@ do_more: bit = ufs_dtogd (fragment); if (cgno >= uspi->s_ncg) { ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device"); - goto failed; + goto failed_unlock; } end_bit = bit + count; if (end_bit > uspi->s_fpg) { @@ -173,36 +167,36 @@ do_more: ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) - goto failed; - ucg = ubh_get_ucg (UCPI_UBH); + goto failed_unlock; + ucg = ubh_get_ucg (UCPI_UBH(ucpi)); if (!ufs_cg_chkmagic(sb, ucg)) { ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno); - goto failed; + goto failed_unlock; } for (i = bit; i < end_bit; i += uspi->s_fpb) { blkno = ufs_fragstoblks(i); - if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) { + if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) { ufs_error(sb, "ufs_free_blocks", "freeing free fragment"); } - ubh_setblock(UCPI_UBH, ucpi->c_freeoff, blkno); + ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno); if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, 1); DQUOT_FREE_BLOCK(inode, uspi->s_fpb); fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1); - fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1); + uspi->cs_total.cs_nbfree++; fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1); cylno = ufs_cbtocylno(i); fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(i)), 1); fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1); } - ubh_mark_buffer_dirty (USPI_UBH); - ubh_mark_buffer_dirty (UCPI_UBH); + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); if (sb->s_flags & MS_SYNCHRONOUS) { - ubh_ll_rw_block (SWRITE, 1, (struct ufs_buffer_head **)&ucpi); - ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); + ubh_wait_on_buffer (UCPI_UBH(ucpi)); } if (overflow) { @@ -213,38 +207,83 @@ do_more: sb->s_dirt = 1; unlock_super (sb); - UFSD(("EXIT\n")) + UFSD("EXIT\n"); return; -failed: +failed_unlock: unlock_super (sb); - UFSD(("EXIT (FAILED)\n")) +failed: + UFSD("EXIT (FAILED)\n"); return; } +/* + * Modify inode page cache in such way: + * have - blocks with b_blocknr equal to oldb...oldb+count-1 + * get - blocks with b_blocknr equal to newb...newb+count-1 + * also we suppose that oldb...oldb+count-1 blocks + * situated at the end of file. + * + * We can come here from ufs_writepage or ufs_prepare_write, + * locked_page is argument of these functions, so we already lock it. + */ +static void ufs_change_blocknr(struct inode *inode, unsigned int baseblk, + unsigned int count, unsigned int oldb, + unsigned int newb, struct page *locked_page) +{ + unsigned int blk_per_page = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits); + struct address_space *mapping = inode->i_mapping; + pgoff_t index, cur_index = locked_page->index; + unsigned int i, j; + struct page *page; + struct buffer_head *head, *bh; + + UFSD("ENTER, ino %lu, count %u, oldb %u, newb %u\n", + inode->i_ino, count, oldb, newb); + + BUG_ON(!PageLocked(locked_page)); + + for (i = 0; i < count; i += blk_per_page) { + index = (baseblk+i) >> (PAGE_CACHE_SHIFT - inode->i_blkbits); + + if (likely(cur_index != index)) { + page = ufs_get_locked_page(mapping, index); + if (IS_ERR(page)) + continue; + } else + page = locked_page; + + j = i; + head = page_buffers(page); + bh = head; + do { + if (likely(bh->b_blocknr == j + oldb && j < count)) { + unmap_underlying_metadata(bh->b_bdev, + bh->b_blocknr); + bh->b_blocknr = newb + j++; + mark_buffer_dirty(bh); + } + bh = bh->b_this_page; + } while (bh != head); -#define NULLIFY_FRAGMENTS \ - for (i = oldcount; i < newcount; i++) { \ - bh = sb_getblk(sb, result + i); \ - memset (bh->b_data, 0, sb->s_blocksize); \ - set_buffer_uptodate(bh); \ - mark_buffer_dirty (bh); \ - if (IS_SYNC(inode)) \ - sync_dirty_buffer(bh); \ - brelse (bh); \ - } + set_page_dirty(page); + + if (likely(cur_index != index)) + ufs_put_locked_page(page); + } + UFSD("EXIT\n"); +} -unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, - unsigned goal, unsigned count, int * err ) +unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment, + unsigned goal, unsigned count, int * err, struct page *locked_page) { 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 cgno, oldcount, newcount, tmp, request, result; - UFSD(("ENTER, ino %lu, fragment %u, goal %u, count %u\n", inode->i_ino, fragment, goal, count)) + UFSD("ENTER, ino %lu, fragment %u, goal %u, count %u\n", inode->i_ino, fragment, goal, count); sb = inode->i_sb; uspi = UFS_SB(sb)->s_uspi; @@ -273,14 +312,14 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, return (unsigned)-1; } if (fragment < UFS_I(inode)->i_lastfrag) { - UFSD(("EXIT (ALREADY ALLOCATED)\n")) + UFSD("EXIT (ALREADY ALLOCATED)\n"); unlock_super (sb); return 0; } } else { if (tmp) { - UFSD(("EXIT (ALREADY ALLOCATED)\n")) + UFSD("EXIT (ALREADY ALLOCATED)\n"); unlock_super(sb); return 0; } @@ -289,9 +328,9 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, /* * There is not enough space for user on the device */ - if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(usb1, UFS_MINFREE) <= 0) { + if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) { unlock_super (sb); - UFSD(("EXIT (FAILED)\n")) + UFSD("EXIT (FAILED)\n"); return 0; } @@ -310,12 +349,10 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, if (result) { *p = cpu_to_fs32(sb, result); *err = 0; - inode->i_blocks += count << uspi->s_nspfshift; UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); - NULLIFY_FRAGMENTS } unlock_super(sb); - UFSD(("EXIT, result %u\n", result)) + UFSD("EXIT, result %u\n", result); return result; } @@ -325,11 +362,9 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, result = ufs_add_fragments (inode, tmp, oldcount, newcount, err); if (result) { *err = 0; - inode->i_blocks += count << uspi->s_nspfshift; UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count); - NULLIFY_FRAGMENTS unlock_super(sb); - UFSD(("EXIT, result %u\n", result)) + UFSD("EXIT, result %u\n", result); return result; } @@ -339,8 +374,8 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, switch (fs32_to_cpu(sb, usb1->fs_optim)) { case UFS_OPTSPACE: request = newcount; - if (uspi->s_minfree < 5 || fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree) - > uspi->s_dsize * uspi->s_minfree / (2 * 100) ) + if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree + > uspi->s_dsize * uspi->s_minfree / (2 * 100)) break; usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); break; @@ -349,7 +384,7 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, case UFS_OPTTIME: request = uspi->s_fpb; - if (fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree) < uspi->s_dsize * + if (uspi->cs_total.cs_nffree < uspi->s_dsize * (uspi->s_minfree - 2) / 100) break; usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME); @@ -357,39 +392,22 @@ unsigned ufs_new_fragments (struct inode * inode, __fs32 * p, unsigned fragment, } result = ufs_alloc_fragments (inode, cgno, goal, request, err); if (result) { - for (i = 0; i < oldcount; i++) { - bh = sb_bread(sb, tmp + i); - if(bh) - { - clear_buffer_dirty(bh); - bh->b_blocknr = result + i; - mark_buffer_dirty (bh); - if (IS_SYNC(inode)) - sync_dirty_buffer(bh); - brelse (bh); - } - else - { - printk(KERN_ERR "ufs_new_fragments: bread fail\n"); - unlock_super(sb); - return 0; - } - } + ufs_change_blocknr(inode, fragment - oldcount, oldcount, tmp, + result, locked_page); + *p = cpu_to_fs32(sb, result); *err = 0; - inode->i_blocks += count << uspi->s_nspfshift; UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->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)) + UFSD("EXIT, result %u\n", result); return result; } unlock_super(sb); - UFSD(("EXIT (FAILED)\n")) + UFSD("EXIT (FAILED)\n"); return 0; } @@ -404,7 +422,7 @@ ufs_add_fragments (struct inode * inode, unsigned fragment, struct ufs_cylinder_group * ucg; unsigned cgno, fragno, fragoff, count, fragsize, i; - UFSD(("ENTER, fragment %u, oldcount %u, newcount %u\n", fragment, oldcount, newcount)) + UFSD("ENTER, fragment %u, oldcount %u, newcount %u\n", fragment, oldcount, newcount); sb = inode->i_sb; uspi = UFS_SB(sb)->s_uspi; @@ -419,7 +437,7 @@ ufs_add_fragments (struct inode * inode, unsigned fragment, ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) return 0; - ucg = ubh_get_ucg (UCPI_UBH); + ucg = ubh_get_ucg (UCPI_UBH(ucpi)); if (!ufs_cg_chkmagic(sb, ucg)) { ufs_panic (sb, "ufs_add_fragments", "internal error, bad magic number on cg %u", cgno); @@ -429,14 +447,14 @@ ufs_add_fragments (struct inode * inode, unsigned fragment, fragno = ufs_dtogd (fragment); fragoff = ufs_fragnum (fragno); for (i = oldcount; i < newcount; i++) - if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) + if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i)) return 0; /* * Block can be extended */ ucg->cg_time = cpu_to_fs32(sb, get_seconds()); for (i = newcount; i < (uspi->s_fpb - fragoff); i++) - if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, fragno + i)) + if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i)) break; fragsize = i - oldcount; if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize])) @@ -446,7 +464,7 @@ ufs_add_fragments (struct inode * inode, unsigned fragment, if (fragsize != count) fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1); for (i = oldcount; i < newcount; i++) - ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, fragno + i); + ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i); if(DQUOT_ALLOC_BLOCK(inode, count)) { *err = -EDQUOT; return 0; @@ -454,17 +472,17 @@ ufs_add_fragments (struct inode * inode, unsigned fragment, fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); - fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count); + uspi->cs_total.cs_nffree -= count; - ubh_mark_buffer_dirty (USPI_UBH); - ubh_mark_buffer_dirty (UCPI_UBH); + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); if (sb->s_flags & MS_SYNCHRONOUS) { - ubh_ll_rw_block (SWRITE, 1, (struct ufs_buffer_head **)&ucpi); - ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); + ubh_wait_on_buffer (UCPI_UBH(ucpi)); } sb->s_dirt = 1; - UFSD(("EXIT, fragment %u\n", fragment)) + UFSD("EXIT, fragment %u\n", fragment); return fragment; } @@ -487,7 +505,7 @@ static unsigned ufs_alloc_fragments (struct inode * inode, unsigned cgno, struct ufs_cylinder_group * ucg; unsigned oldcg, i, j, k, result, allocsize; - UFSD(("ENTER, ino %lu, cgno %u, goal %u, count %u\n", inode->i_ino, cgno, goal, count)) + UFSD("ENTER, ino %lu, cgno %u, goal %u, count %u\n", inode->i_ino, cgno, goal, count); sb = inode->i_sb; uspi = UFS_SB(sb)->s_uspi; @@ -521,14 +539,14 @@ static unsigned ufs_alloc_fragments (struct inode * inode, unsigned cgno, UFS_TEST_FREE_SPACE_CG } - UFSD(("EXIT (FAILED)\n")) + UFSD("EXIT (FAILED)\n"); return 0; cg_found: ucpi = ufs_load_cylinder (sb, cgno); if (!ucpi) return 0; - ucg = ubh_get_ucg (UCPI_UBH); + ucg = ubh_get_ucg (UCPI_UBH(ucpi)); if (!ufs_cg_chkmagic(sb, ucg)) ufs_panic (sb, "ufs_alloc_fragments", "internal error, bad magic number on cg %u", cgno); @@ -551,12 +569,12 @@ cg_found: return 0; goal = ufs_dtogd (result); for (i = count; i < uspi->s_fpb; i++) - ubh_setbit (UCPI_UBH, ucpi->c_freeoff, goal + i); + ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i); i = uspi->s_fpb - count; DQUOT_FREE_BLOCK(inode, i); fs32_add(sb, &ucg->cg_cs.cs_nffree, i); - fs32_add(sb, &usb1->fs_cstotal.cs_nffree, i); + uspi->cs_total.cs_nffree += i; fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i); fs32_add(sb, &ucg->cg_frsum[i], 1); goto succed; @@ -570,10 +588,10 @@ cg_found: return 0; } for (i = 0; i < count; i++) - ubh_clrbit (UCPI_UBH, ucpi->c_freeoff, result + i); + ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i); fs32_sub(sb, &ucg->cg_cs.cs_nffree, count); - fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, count); + uspi->cs_total.cs_nffree -= count; fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count); fs32_sub(sb, &ucg->cg_frsum[allocsize], 1); @@ -581,16 +599,16 @@ cg_found: fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1); succed: - ubh_mark_buffer_dirty (USPI_UBH); - ubh_mark_buffer_dirty (UCPI_UBH); + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); if (sb->s_flags & MS_SYNCHRONOUS) { - ubh_ll_rw_block (SWRITE, 1, (struct ufs_buffer_head **)&ucpi); - ubh_wait_on_buffer (UCPI_UBH); + ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi)); + ubh_wait_on_buffer (UCPI_UBH(ucpi)); } sb->s_dirt = 1; result += cgno * uspi->s_fpg; - UFSD(("EXIT3, result %u\n", result)) + UFSD("EXIT3, result %u\n", result); return result; } @@ -603,12 +621,12 @@ static unsigned ufs_alloccg_block (struct inode * inode, struct ufs_cylinder_group * ucg; unsigned result, cylno, blkno; - UFSD(("ENTER, goal %u\n", goal)) + UFSD("ENTER, goal %u\n", goal); sb = inode->i_sb; uspi = UFS_SB(sb)->s_uspi; usb1 = ubh_get_usb_first(uspi); - ucg = ubh_get_ucg(UCPI_UBH); + ucg = ubh_get_ucg(UCPI_UBH(ucpi)); if (goal == 0) { goal = ucpi->c_rotor; @@ -620,7 +638,7 @@ static unsigned ufs_alloccg_block (struct inode * inode, /* * If the requested block is available, use it. */ - if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, ufs_fragstoblks(goal))) { + if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, ufs_fragstoblks(goal))) { result = goal; goto gotit; } @@ -632,7 +650,7 @@ norot: ucpi->c_rotor = result; gotit: blkno = ufs_fragstoblks(result); - ubh_clrblock (UCPI_UBH, ucpi->c_freeoff, blkno); + ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno); if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD) ufs_clusteracct (sb, ucpi, blkno, -1); if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) { @@ -641,31 +659,76 @@ gotit: } fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1); - fs32_sub(sb, &usb1->fs_cstotal.cs_nbfree, 1); + uspi->cs_total.cs_nbfree--; fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1); cylno = ufs_cbtocylno(result); fs16_sub(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(result)), 1); fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1); - UFSD(("EXIT, result %u\n", result)) + UFSD("EXIT, result %u\n", result); return result; } -static unsigned ufs_bitmap_search (struct super_block * sb, - struct ufs_cg_private_info * ucpi, unsigned goal, unsigned count) +static unsigned ubh_scanc(struct ufs_sb_private_info *uspi, + struct ufs_buffer_head *ubh, + unsigned begin, unsigned size, + unsigned char *table, unsigned char mask) { - 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; - - UFSD(("ENTER, cg %u, goal %u, count %u\n", ucpi->c_cgx, goal, count)) + unsigned rest, offset; + unsigned char *cp; + + + offset = begin & ~uspi->s_fmask; + begin >>= uspi->s_fshift; + for (;;) { + if ((offset + size) < uspi->s_fsize) + rest = size; + else + rest = uspi->s_fsize - offset; + size -= rest; + cp = ubh->bh[begin]->b_data + offset; + while ((table[*cp++] & mask) == 0 && --rest) + ; + if (rest || !size) + break; + begin++; + offset = 0; + } + return (size + rest); +} + +/* + * Find a block of the specified size in the specified cylinder group. + * @sp: pointer to super block + * @ucpi: pointer to cylinder group info + * @goal: near which block we want find new one + * @count: specified size + */ +static unsigned ufs_bitmap_search(struct super_block *sb, + struct ufs_cg_private_info *ucpi, + unsigned goal, unsigned count) +{ + /* + * Bit patterns for identifying fragments in the block map + * used as ((map & mask_arr) == want_arr) + */ + static const int mask_arr[9] = { + 0x3, 0x7, 0xf, 0x1f, 0x3f, 0x7f, 0xff, 0x1ff, 0x3ff + }; + static const int want_arr[9] = { + 0x0, 0x2, 0x6, 0xe, 0x1e, 0x3e, 0x7e, 0xfe, 0x1fe + }; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct ufs_super_block_first *usb1; + struct ufs_cylinder_group *ucg; + unsigned start, length, loc, result; + unsigned pos, want, blockmap, mask, end; + + UFSD("ENTER, cg %u, goal %u, count %u\n", ucpi->c_cgx, goal, count); - uspi = UFS_SB(sb)->s_uspi; usb1 = ubh_get_usb_first (uspi); - ucg = ubh_get_ucg(UCPI_UBH); + ucg = ubh_get_ucg(UCPI_UBH(ucpi)); if (goal) start = ufs_dtogd(goal) >> 3; @@ -673,53 +736,50 @@ static unsigned ufs_bitmap_search (struct super_block * sb, start = ucpi->c_frotor >> 3; length = ((uspi->s_fpg + 7) >> 3) - start; - location = ubh_scanc(UCPI_UBH, ucpi->c_freeoff + start, length, + loc = ubh_scanc(uspi, UCPI_UBH(ucpi), 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) { + if (loc == 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); + loc = ubh_scanc(uspi, UCPI_UBH(ucpi), ucpi->c_freeoff, length, + (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : + ufs_fragtable_other, + 1 << (count - 1 + (uspi->s_fpb & 7))); + if (loc == 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; + result = (start + length - loc) << 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")) + + for (end = result + 8; result < end; result += uspi->s_fpb) { + blockmap = ubh_blkmap(UCPI_UBH(ucpi), ucpi->c_freeoff, result); + blockmap <<= 1; + mask = mask_arr[count]; + want = want_arr[count]; + for (pos = 0; pos <= uspi->s_fpb - count; pos++) { + if ((blockmap & mask) == want) { + UFSD("EXIT, result %u\n", result); + return result + pos; + } + mask <<= 1; + want <<= 1; + } + } + + ufs_error(sb, "ufs_bitmap_search", "block not in map on cg %u\n", + ucpi->c_cgx); + UFSD("EXIT (FAILED)\n"); return (unsigned)-1; } @@ -734,9 +794,9 @@ static void ufs_clusteracct(struct super_block * sb, return; if (cnt > 0) - ubh_setbit(UCPI_UBH, ucpi->c_clusteroff, blkno); + ubh_setbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno); else - ubh_clrbit(UCPI_UBH, ucpi->c_clusteroff, blkno); + ubh_clrbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno); /* * Find the size of the cluster going forward. @@ -745,7 +805,7 @@ static void ufs_clusteracct(struct super_block * sb, 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); + i = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, end, start); if (i > end) i = end; forw = i - start; @@ -757,7 +817,7 @@ static void ufs_clusteracct(struct super_block * sb, end = start - uspi->s_contigsumsize; if (end < 0 ) end = -1; - i = ubh_find_last_zero_bit (UCPI_UBH, ucpi->c_clusteroff, start, end); + i = ubh_find_last_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, start, end); if ( i < end) i = end; back = start - i; @@ -769,11 +829,11 @@ static void ufs_clusteracct(struct super_block * sb, i = back + forw + 1; if (i > uspi->s_contigsumsize) i = uspi->s_contigsumsize; - fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (i << 2)), cnt); + fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (i << 2)), cnt); if (back > 0) - fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (back << 2)), cnt); + fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (back << 2)), cnt); if (forw > 0) - fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH, ucpi->c_clustersumoff + (forw << 2)), cnt); + fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (forw << 2)), cnt); } |