diff options
| author | Jarek Poplawski <jarkao2@gmail.com> | 2010-08-09 16:18:48 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-10 12:39:14 +0400 |
| commit | 68fd26b59856b466edd14d8a90d01255983cd3ee (patch) | |
| tree | 75dc4e5cb9c5af0b8281b278ae408efdf1569ad8 /net/sched/sch_api.c | |
| parent | da7115d94a15f53efa224e47f16c57fd1998355f (diff) | |
| download | linux-68fd26b59856b466edd14d8a90d01255983cd3ee.tar.xz | |
pkt_sched: Add some basic qdisc class ops verification. Was: [PATCH] sfq: add dummy bind/unbind handles
Verify in register_qdisc() some basic qdisc class handlers are present.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_api.c')
| -rw-r--r-- | net/sched/sch_api.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index b9e8c3b7d406..8ed2f5649029 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -150,22 +150,34 @@ int register_qdisc(struct Qdisc_ops *qops) if (qops->enqueue == NULL) qops->enqueue = noop_qdisc_ops.enqueue; if (qops->peek == NULL) { - if (qops->dequeue == NULL) { + if (qops->dequeue == NULL) qops->peek = noop_qdisc_ops.peek; - } else { - rc = -EINVAL; - goto out; - } + else + goto out_einval; } if (qops->dequeue == NULL) qops->dequeue = noop_qdisc_ops.dequeue; + if (qops->cl_ops) { + const struct Qdisc_class_ops *cops = qops->cl_ops; + + if (!(cops->get && cops->put)) + goto out_einval; + + if (cops->tcf_chain && !(cops->bind_tcf && cops->unbind_tcf)) + goto out_einval; + } + qops->next = NULL; *qp = qops; rc = 0; out: write_unlock(&qdisc_mod_lock); return rc; + +out_einval: + rc = -EINVAL; + goto out; } EXPORT_SYMBOL(register_qdisc); |