From f21f15e5a054546430e6acfa9d639f770184ecbc Mon Sep 17 00:00:00 2001 From: Howard Chu Date: Mon, 4 Aug 2014 04:57:53 -0700 Subject: [PATCH] ITS#7793 update branch key if needed --- libraries/liblmdb/mdb.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 16f5855..d8ac040 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -6056,6 +6056,22 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data, return MDB_BAD_VALSIZE; ptr = LEAF2KEY(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], ksize); memcpy(ptr, key->mv_data, ksize); +fix_parent: + /* if overwriting slot 0 of leaf, need to + * update branch key if there is a parent page + */ + if (mc->mc_top && !mc->mc_ki[mc->mc_top]) { + unsigned short top = mc->mc_top; + mc->mc_top--; + /* slot 0 is always an empty key, needs no update */ + if (mc->mc_ki[mc->mc_top]) + rc2 = mdb_update_key(mc, key); + else + rc2 = MDB_SUCCESS; + mc->mc_top = top; + if (rc2) + return rc2; + } return MDB_SUCCESS; } @@ -6261,8 +6277,10 @@ current: data->mv_data = olddata.mv_data; else if (!(mc->mc_flags & C_SUB)) memcpy(olddata.mv_data, data->mv_data, data->mv_size); - else + else { memcpy(NODEKEY(leaf), key->mv_data, key->mv_size); + goto fix_parent; + } return MDB_SUCCESS; } mdb_node_del(mc, 0);