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[XFS] implement generic xfs_btree_update

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From: Dave Chinner <dgc@sgi.com>

The most complicated part here is the lastrec tracking for the alloc
btree. Most logic is in the update_lastrec method which has to do some
hopefully good enough dirty magic to maintain it.

[hch: split out from bigger patch and a rework of the lastrec

logic]

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32194a

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 16:56:32 +11:00
committed by Lachlan McIlroy
parent 38bb74237d
commit 278d0ca14e
11 changed files with 230 additions and 184 deletions
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7
fs/xfs/xfs_alloc_btree.h
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@@ -113,13 +113,6 @@ extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno,
*/
extern int xfs_alloc_insert(struct xfs_btree_cur *cur, int *stat);
/*
* Update the record referred to by cur, to the value given by [bno, len].
* This either works (return 0) or gets an EFSCORRUPTED error.
*/
extern int xfs_alloc_update(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len);
extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
struct xfs_trans *, struct xfs_buf *,