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authorChristoph Hellwig <hch@infradead.org>2008-10-30 16:55:45 +1100
committerLachlan McIlroy <lachlan@sgi.com>2008-10-30 16:55:45 +1100
commit637aa50f461b8ea6b1e8bf9877b0d13d00085043 (patch)
treea7c00b821dca04fe90614461749b74eff40bd8ed /fs/xfs/xfs_bmap_btree.c
parent65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8 (diff)
downloadop-kernel-dev-637aa50f461b8ea6b1e8bf9877b0d13d00085043.zip
op-kernel-dev-637aa50f461b8ea6b1e8bf9877b0d13d00085043.tar.gz
[XFS] implement generic xfs_btree_increment
From: Dave Chinner <dgc@sgi.com> Because this is the first major generic btree routine this patch includes some infrastrucure, first a few routines to deal with a btree block that can be either in short or long form, second xfs_btree_read_buf_block, which is the new central routine to read a btree block given a cursor, and third the new xfs_btree_ptr_addr routine to calculate the address for a given btree pointer record. [hch: split out from bigger patch and minor adaptions] SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32190a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Bill O'Donnell <billodo@sgi.com> Signed-off-by: David Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_bmap_btree.c')
-rw-r--r--fs/xfs/xfs_bmap_btree.c88
1 files changed, 4 insertions, 84 deletions
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index a71010a..2d29a49 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -254,7 +254,7 @@ xfs_bmbt_delrec(
if (rbno != NULLFSBLOCK) {
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- if ((error = xfs_bmbt_increment(tcur, level, &i))) {
+ if ((error = xfs_btree_increment(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
@@ -445,7 +445,7 @@ xfs_bmbt_delrec(
cur->bc_bufs[level] = lbp;
cur->bc_ptrs[level] += lrecs;
cur->bc_ra[level] = 0;
- } else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
+ } else if ((error = xfs_btree_increment(cur, level + 1, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
@@ -929,7 +929,7 @@ xfs_bmbt_lookup(
if (dir == XFS_LOOKUP_GE && keyno > be16_to_cpu(block->bb_numrecs) &&
be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) {
cur->bc_ptrs[0] = keyno;
- if ((error = xfs_bmbt_increment(cur, 0, &i))) {
+ if ((error = xfs_btree_increment(cur, 0, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
@@ -1202,7 +1202,7 @@ xfs_bmbt_rshift(
}
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- if ((error = xfs_bmbt_increment(tcur, level, &i))) {
+ if ((error = xfs_btree_increment(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
goto error1;
}
@@ -1761,86 +1761,6 @@ xfs_bmbt_disk_get_startoff(
}
/*
- * Increment cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-int /* error */
-xfs_bmbt_increment(
- xfs_btree_cur_t *cur,
- int level,
- int *stat) /* success/failure */
-{
- xfs_bmbt_block_t *block;
- xfs_buf_t *bp;
- int error; /* error return value */
- xfs_fsblock_t fsbno;
- int lev;
- xfs_mount_t *mp;
- xfs_trans_t *tp;
-
- XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
- XFS_BMBT_TRACE_ARGI(cur, level);
- ASSERT(level < cur->bc_nlevels);
-
- xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
- block = xfs_bmbt_get_block(cur, level, &bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
- XFS_BMBT_TRACE_CURSOR(cur, ERROR);
- return error;
- }
-#endif
- if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
- XFS_BMBT_TRACE_CURSOR(cur, EXIT);
- *stat = 1;
- return 0;
- }
- if (be64_to_cpu(block->bb_rightsib) == NULLDFSBNO) {
- XFS_BMBT_TRACE_CURSOR(cur, EXIT);
- *stat = 0;
- return 0;
- }
- for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
- block = xfs_bmbt_get_block(cur, lev, &bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
- XFS_BMBT_TRACE_CURSOR(cur, ERROR);
- return error;
- }
-#endif
- if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
- break;
- xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
- }
- if (lev == cur->bc_nlevels) {
- XFS_BMBT_TRACE_CURSOR(cur, EXIT);
- *stat = 0;
- return 0;
- }
- tp = cur->bc_tp;
- mp = cur->bc_mp;
- for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
- fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur));
- if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
- XFS_BMAP_BTREE_REF))) {
- XFS_BMBT_TRACE_CURSOR(cur, ERROR);
- return error;
- }
- lev--;
- xfs_btree_setbuf(cur, lev, bp);
- block = XFS_BUF_TO_BMBT_BLOCK(bp);
- if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
- XFS_BMBT_TRACE_CURSOR(cur, ERROR);
- return error;
- }
- cur->bc_ptrs[lev] = 1;
- }
- XFS_BMBT_TRACE_CURSOR(cur, EXIT);
- *stat = 1;
- return 0;
-}
-
-/*
* Insert the current record at the point referenced by cur.
*
* A multi-level split of the tree on insert will invalidate the original
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