ocfs2: charge quota for reflinked blocks

When ocfs2 shares blocks from one file to another, it's necessary to
charge that many blocks to the quota because ocfs2 tallies block charges
according to the number of blocks mapped, not the number of physical
blocks used.

Without this patch, reflinking X blocks and then CoWing all of them
causes quota usage to *decrease* by X as seen in generic/305.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 6c98d567ba0129f92deaee8366937f0f9c20bad9..dc8089af9ddffd36212abe6c2444bf063687f7f8 100644 (file)
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -3933,6 +3933,13 @@ static int ocfs2_add_refcounted_extent(struct inode *inode,
        ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
                                      p_cluster, num_clusters,
                                      meta_ac, dealloc);
+       if (ret) {
+               mlog_errno(ret);
+               goto out_commit;
+       }
+
+       ret = dquot_alloc_space_nodirty(inode,
+               ocfs2_clusters_to_bytes(osb->sb, num_clusters));
        if (ret)
                mlog_errno(ret);