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| author | Christoph Hellwig <hch@infradead.org> | 2008-10-30 16:56:32 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:56:32 +1100 |
| commit | 278d0ca14e889c3932a05d1a68675252a12b3466 (patch) | |
| tree | a228d171d4aded60b27639e30eca1bf58ed7daa6 /fs/xfs/xfs_alloc.c | |
| parent | 38bb74237d2d94c1aced2ec626d7d0f317e360da (diff) | |
| download | kernel_samsung_smdk4412-278d0ca14e889c3932a05d1a68675252a12b3466.zip kernel_samsung_smdk4412-278d0ca14e889c3932a05d1a68675252a12b3466.tar.gz kernel_samsung_smdk4412-278d0ca14e889c3932a05d1a68675252a12b3466.tar.bz2 | |
[XFS] implement generic xfs_btree_update
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>
Diffstat (limited to 'fs/xfs/xfs_alloc.c')
| -rw-r--r-- | fs/xfs/xfs_alloc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 6bda0ae..875e1ba 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -136,6 +136,23 @@ xfs_alloc_lookup_le( return xfs_btree_lookup(cur, XFS_LOOKUP_LE, 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. + */ +STATIC int /* error */ +xfs_alloc_update( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len) /* length of extent */ +{ + union xfs_btree_rec rec; + + rec.alloc.ar_startblock = cpu_to_be32(bno); + rec.alloc.ar_blockcount = cpu_to_be32(len); + return xfs_btree_update(cur, &rec); +} /* * Compute aligned version of the found extent. |