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authorJie Liu <jeff.liu@oracle.com>2013-12-13 15:51:48 +1100
committerDave Chinner <david@fromorbit.com>2013-12-13 15:51:48 +1100
commit904957b75033149509dc0fecc0af34348f87c78c (patch)
treeb01dc1ed2eea95de9cd980bab08b209d6853a64d /fs/xfs
parent126cd105d4408ff52437a72d681aecdb29cc80e8 (diff)
xfs: introduce a common helper xfs_icluster_size_fsb
Introduce a common routine xfs_icluster_size_fsb() to calculate and return the number of file system blocks per inode cluster. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_ialloc.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h
index d86f8bdc963e..812365d17e67 100644
--- a/fs/xfs/xfs_ialloc.h
+++ b/fs/xfs/xfs_ialloc.h
@@ -28,6 +28,16 @@ struct xfs_btree_cur;
/* Move inodes in clusters of this size */
#define XFS_INODE_BIG_CLUSTER_SIZE 8192
+/* Calculate and return the number of filesystem blocks per inode cluster */
+static inline int
+xfs_icluster_size_fsb(
+ struct xfs_mount *mp)
+{
+ if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
+ return 1;
+ return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
+}
+
/*
* Make an inode pointer out of the buffer/offset.
*/