xfs: fully initialise temp leaf in xfs_attr3_leaf_unbalance

[deliverable/linux.git] / fs / xfs / xfs_attr_leaf.c

diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 0bce1b3485800a9319fb1116a5d8d11edf485392..79ece72976ae9adf50d025c02d0e1c66e4de80ee 100644 (file)
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -2181,14 +2181,24 @@ xfs_attr3_leaf_unbalance(
                struct xfs_attr_leafblock *tmp_leaf;
                struct xfs_attr3_icleaf_hdr tmphdr;
 
-               tmp_leaf = kmem_alloc(state->blocksize, KM_SLEEP);
-               memset(tmp_leaf, 0, state->blocksize);
-               memset(&tmphdr, 0, sizeof(tmphdr));
+               tmp_leaf = kmem_zalloc(state->blocksize, KM_SLEEP);
+
+               /*
+                * Copy the header into the temp leaf so that all the stuff
+                * not in the incore header is present and gets copied back in
+                * once we've moved all the entries.
+                */
+               memcpy(tmp_leaf, save_leaf, xfs_attr3_leaf_hdr_size(save_leaf));
 
+               memset(&tmphdr, 0, sizeof(tmphdr));
                tmphdr.magic = savehdr.magic;
                tmphdr.forw = savehdr.forw;
                tmphdr.back = savehdr.back;
                tmphdr.firstused = state->blocksize;
+
+               /* write the header to the temp buffer to initialise it */
+               xfs_attr3_leaf_hdr_to_disk(tmp_leaf, &tmphdr);
+
                if (xfs_attr3_leaf_order(save_blk->bp, &savehdr,
                                         drop_blk->bp, &drophdr)) {
                        xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0,