1 files changed, 27 insertions, 3 deletions

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 4c7a4d8ed32c..3346e5b199d5 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1422,12 +1422,14 @@ static int ocfs2_remove_inode_range(struct inode *inode,
                                     struct buffer_head *di_bh, u64 byte_start,
                                     u64 byte_len)
 {
-        int ret = 0;
+        int ret = 0, flags = 0;
         u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
         struct ocfs2_cached_dealloc_ctxt dealloc;
         struct address_space *mapping = inode->i_mapping;
         struct ocfs2_extent_tree et;
+        struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+        u64 refcount_loc = le64_to_cpu(di->i_refcount_loc);
 
         ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
         ocfs2_init_dealloc_ctxt(&dealloc);
@@ -1453,6 +1455,27 @@ static int ocfs2_remove_inode_range(struct inode *inode,
                 goto out;
         }
 
+        /*
+         * For reflinks, we may need to CoW 2 clusters which might be
+         * partially zero'd later, if hole's start and end offset were
+         * within one cluster(means is not exactly aligned to clustersize).
+         */
+
+        if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
+
+                ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
+                if (ret) {
+                        mlog_errno(ret);
+                        goto out;
+                }
+
+                ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
+                if (ret) {
+                        mlog_errno(ret);
+                        goto out;
+                }
+        }
+
         trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
         trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
         if (trunc_len >= trunc_start)
@@ -1474,7 +1497,7 @@ static int ocfs2_remove_inode_range(struct inode *inode,
         cpos = trunc_start;
         while (trunc_len) {
                 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
-                                         &alloc_size, NULL);
+                                         &alloc_size, &flags);
                 if (ret) {
                         mlog_errno(ret);
                         goto out;
@@ -1487,7 +1510,8 @@ static int ocfs2_remove_inode_range(struct inode *inode,
                 if (phys_cpos != 0) {
                         ret = ocfs2_remove_btree_range(inode, &et, cpos,
                                                        phys_cpos, alloc_size,
-                                                       0, &dealloc, 0);
+                                                       flags, &dealloc,
+                                                       refcount_loc);
                         if (ret) {
                                 mlog_errno(ret);
                                 goto out;