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authorTao Ma <tao.ma@oracle.com>2009-08-18 11:43:49 +0800
committerJoel Becker <joel.becker@oracle.com>2009-09-22 20:09:44 -0700
commit8b2c0dba5159570af5721d40490f6c529d721500 (patch)
treefaca76fab3c9a65ba8e7be3aa93d02e4ff53f0cf /fs/ocfs2/refcounttree.c
parent0129241e2b3b90ff83a8c774353e5612d84bd493 (diff)
downloadblackbird-op-linux-8b2c0dba5159570af5721d40490f6c529d721500.tar.gz
blackbird-op-linux-8b2c0dba5159570af5721d40490f6c529d721500.zip
ocfs2: Call refcount tree remove process properly.
Now with xattr refcount support, we need to check whether we have xattr refcounted before we remove the refcount tree. Now the mechanism is: 1) Check whether i_clusters == 0, if no, exit. 2) check whether we have i_xattr_loc in dinode. if yes, exit. 2) Check whether we have inline xattr stored outside, if yes, exit. 4) Remove the tree. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/refcounttree.c')
-rw-r--r--fs/ocfs2/refcounttree.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index a85c01c6629d..5656c68a2cae 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -927,6 +927,42 @@ out:
}
/*
+ * Try to remove refcount tree. The mechanism is:
+ * 1) Check whether i_clusters == 0, if no, exit.
+ * 2) check whether we have i_xattr_loc in dinode. if yes, exit.
+ * 3) Check whether we have inline xattr stored outside, if yes, exit.
+ * 4) Remove the tree.
+ */
+int ocfs2_try_remove_refcount_tree(struct inode *inode,
+ struct buffer_head *di_bh)
+{
+ int ret;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+
+ down_write(&oi->ip_xattr_sem);
+ down_write(&oi->ip_alloc_sem);
+
+ if (oi->ip_clusters)
+ goto out;
+
+ if ((oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) && di->i_xattr_loc)
+ goto out;
+
+ if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL &&
+ ocfs2_has_inline_xattr_value_outside(inode, di))
+ goto out;
+
+ ret = ocfs2_remove_refcount_tree(inode, di_bh);
+ if (ret)
+ mlog_errno(ret);
+out:
+ up_write(&oi->ip_alloc_sem);
+ up_write(&oi->ip_xattr_sem);
+ return 0;
+}
+
+/*
* Given a cpos and len, try to find the refcount record which contains cpos.
* 1. If cpos can be found in one refcount record, return the record.
* 2. If cpos can't be found, return a fake record which start from cpos
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