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[XFS] implement semi-generic xfs_btree_new_root

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From: Dave Chinner <dgc@sgi.com>

Add a xfs_btree_new_root helper for the alloc and ialloc btrees. The bmap
btree needs it's own version and is not converted.

[hch: split out from bigger patch and minor adaptions]

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32200a

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 16:57:16 +11:00
committed by Lachlan McIlroy
parent f5eb8e7ca5
commit 344207ce84
4 changed files with 172 additions and 305 deletions
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5
fs/xfs/xfs_btree.h
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@@ -187,6 +187,10 @@ struct xfs_btree_ops {
/* cursor operations */
struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *);
/* update btree root pointer */
void (*set_root)(struct xfs_btree_cur *cur,
union xfs_btree_ptr *nptr, int level_change);
/* block allocation / freeing */
int (*alloc_block)(struct xfs_btree_cur *cur,
union xfs_btree_ptr *start_bno,
@@ -543,6 +547,7 @@ int xfs_btree_lshift(struct xfs_btree_cur *, int, int *);
int xfs_btree_rshift(struct xfs_btree_cur *, int, int *);
int xfs_btree_split(struct xfs_btree_cur *, int, union xfs_btree_ptr *,
union xfs_btree_key *, struct xfs_btree_cur **, int *);
int xfs_btree_new_root(struct xfs_btree_cur *, int *);
/*
* Helpers.