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[XFS] implement generic xfs_btree_increment

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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>
This commit is contained in:
Christoph Hellwig
2008-10-30 16:55:45 +11:00
committed by Lachlan McIlroy
parent 65f1eaeac0
commit 637aa50f46
12 changed files with 262 additions and 305 deletions
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4
fs/xfs/xfs_bmap.c
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@@ -1646,7 +1646,7 @@ xfs_bmap_add_extent_unwritten_real(
PREV.br_blockcount - new->br_blockcount,
oldext)))
goto done;
if ((error = xfs_bmbt_increment(cur, 0, &i)))
if ((error = xfs_btree_increment(cur, 0, &i)))
goto done;
if ((error = xfs_bmbt_update(cur, new->br_startoff,
new->br_startblock,
@@ -3253,7 +3253,7 @@ xfs_bmap_del_extent(
got.br_startblock, temp,
got.br_state)))
goto done;
if ((error = xfs_bmbt_increment(cur, 0, &i)))
if ((error = xfs_btree_increment(cur, 0, &i)))
goto done;
cur->bc_rec.b = new;
error = xfs_bmbt_insert(cur, &i);