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[PATCH 4/6] xfsprogs: introduce xfs_icluster_size_fsb()

To: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Subject: [PATCH 4/6] xfsprogs: introduce xfs_icluster_size_fsb()
From: Jeff Liu <jeff.liu@xxxxxxxxxx>
Date: Mon, 05 May 2014 20:32:20 +0800
Delivered-to: xfs@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
From: Jie Liu <jeff.liu@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 include/xfs_ialloc.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/xfs_ialloc.h b/include/xfs_ialloc.h
index 0498f20..9dee62f 100644
--- a/include/xfs_ialloc.h
+++ b/include/xfs_ialloc.h
@@ -30,6 +30,16 @@ struct xfs_btree_cur;
  */
 #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.
  */
-- 
1.8.3.2

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