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authorChristoph Hellwig <hch@infradead.org>2008-10-30 16:58:11 +1100
committerLachlan McIlroy <lachlan@sgi.com>2008-10-30 16:58:11 +1100
commit8cc938fe4237e50bea4aa557ed53b06de2319d49 (patch)
tree1b9dd352d423a573d96d5b1b311286a39232ef5b /fs/xfs/xfs_alloc.c
parent91cca5df9bc85efdabfa645f51d54259ed09f4bf (diff)
[XFS] implement generic xfs_btree_get_rec
Not really much reason to make it generic given that it's so small, but this is the last non-method in xfs_alloc_btree.c and xfs_ialloc_btree.c, so it makes the whole btree implementation more structured. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32206a 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.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index e9c70249d2c..54fa69e2776 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -155,6 +155,27 @@ xfs_alloc_update(
}
/*
+ * Get the data from the pointed-to record.
+ */
+STATIC int /* error */
+xfs_alloc_get_rec(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agblock_t *bno, /* output: starting block of extent */
+ xfs_extlen_t *len, /* output: length of extent */
+ int *stat) /* output: success/failure */
+{
+ union xfs_btree_rec *rec;
+ int error;
+
+ error = xfs_btree_get_rec(cur, &rec, stat);
+ if (!error && *stat == 1) {
+ *bno = be32_to_cpu(rec->alloc.ar_startblock);
+ *len = be32_to_cpu(rec->alloc.ar_blockcount);
+ }
+ return error;
+}
+
+/*
* Compute aligned version of the found extent.
* Takes alignment and min length into account.
*/