diff options
Diffstat (limited to 'net/sched/act_api.c')
| -rw-r--r-- | net/sched/act_api.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c index 257360f773b4..7f2cd702bb27 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -428,24 +428,49 @@ static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) return res; } +/*TCA_ACT_MAX_PRIO is 32, there count upto 32 */ +#define TCA_ACT_MAX_PRIO_MASK 0x1FF int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, int nr_actions, struct tcf_result *res) { int ret = -1, i; + u32 jmp_prgcnt = 0; + u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */ if (skb_skip_tc_classify(skb)) return TC_ACT_OK; +restart_act_graph: for (i = 0; i < nr_actions; i++) { const struct tc_action *a = actions[i]; + if (jmp_prgcnt > 0) { + jmp_prgcnt -= 1; + continue; + } repeat: ret = a->ops->act(skb, a, res); if (ret == TC_ACT_REPEAT) goto repeat; /* we need a ttl - JHS */ + + if (ret & TC_ACT_JUMP) { + jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK; + if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) { + /* faulty opcode, stop pipeline */ + return TC_ACT_OK; + } else { + jmp_ttl -= 1; + if (jmp_ttl > 0) + goto restart_act_graph; + else /* faulty graph, stop pipeline */ + return TC_ACT_OK; + } + } + if (ret != TC_ACT_PIPE) break; } + return ret; } EXPORT_SYMBOL(tcf_action_exec); |