diff options
| -rw-r--r-- | sys/netgraph/ng_tty.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/netgraph/ng_tty.c b/sys/netgraph/ng_tty.c index 9e4ecc3..bd341da 100644 --- a/sys/netgraph/ng_tty.c +++ b/sys/netgraph/ng_tty.c @@ -166,10 +166,18 @@ static struct ng_type typestruct = { }; NETGRAPH_INIT(tty, &typestruct); +/* + * XXXRW: ngt_unit is protected by ng_tty_mtx. ngt_ldisc is constant once + * ng_tty is initialized. ngt_nodeop_ok is untouched, and might want to be a + * sleep lock in the future? + */ static int ngt_unit; static int ngt_nodeop_ok; /* OK to create/remove node */ static int ngt_ldisc; +static struct mtx ng_tty_mtx; +MTX_SYSINIT(ng_tty, &ng_tty_mtx, "ng_tty", MTX_DEF); + /****************************************************************** LINE DISCIPLINE METHODS ******************************************************************/ @@ -214,7 +222,9 @@ ngt_open(struct cdev *dev, struct tty *tp) FREE(sc, M_NETGRAPH); goto done; } + mtx_lock(&ng_tty_mtx); snprintf(name, sizeof(name), "%s%d", typestruct.name, ngt_unit++); + mtx_unlock(&ng_tty_mtx); /* Assign node its name */ if ((error = ng_name_node(sc->node, name))) { |
