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-rw-r--r--fs/ubifs/tnc_misc.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
index 4d686e34e64d..d3f8a6aa1f49 100644
--- a/fs/ubifs/tnc_misc.c
+++ b/fs/ubifs/tnc_misc.c
@@ -251,6 +251,28 @@ long ubifs_destroy_tnc_subtree(const struct ubifs_info *c,
}
/**
+ * ubifs_destroy_tnc_tree - destroy all znodes connected to the TNC tree.
+ * @c: UBIFS file-system description object
+ *
+ * This function destroys the whole TNC tree and updates clean global znode
+ * count.
+ */
+void ubifs_destroy_tnc_tree(struct ubifs_info *c)
+{
+ long n, freed;
+
+ if (!c->zroot.znode)
+ return;
+
+ n = atomic_long_read(&c->clean_zn_cnt);
+ freed = ubifs_destroy_tnc_subtree(c, c->zroot.znode);
+ ubifs_assert(c, freed == n);
+ atomic_long_sub(n, &ubifs_clean_zn_cnt);
+
+ c->zroot.znode = NULL;
+}
+
+/**
* read_znode - read an indexing node from flash and fill znode.
* @c: UBIFS file-system description object
* @zzbr: the zbranch describing the node to read