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| author | Patrick McHardy <kaber@trash.net> | 2009-09-04 06:41:15 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-06 02:06:12 -0700 |
| commit | 71ebe5e91947392bc276af713827eab12b6db8e4 (patch) | |
| tree | 198ff02e23f8606ff2a3bec51c7044ec408e19c4 /net/sched/cls_api.c | |
| parent | c9f1d0389b962521af1e2b699c8ee5e299d77b85 (diff) | |
| download | linux-stable-71ebe5e91947392bc276af713827eab12b6db8e4.tar.gz linux-stable-71ebe5e91947392bc276af713827eab12b6db8e4.tar.bz2 linux-stable-71ebe5e91947392bc276af713827eab12b6db8e4.zip | |
net_sched: make cls_ops->tcf_chain() optional
Some qdiscs don't support attaching filters. Handle this centrally in
cls_api and return a proper errno code (EOPNOTSUPP) instead of EINVAL.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_api.c')
| -rw-r--r-- | net/sched/cls_api.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 09cdcdfe7e91..bcfbdb4758c9 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -181,6 +181,9 @@ replay: if ((cops = q->ops->cl_ops) == NULL) return -EINVAL; + if (cops->tcf_chain == NULL) + return -EOPNOTSUPP; + /* Do we search for filter, attached to class? */ if (TC_H_MIN(parent)) { cl = cops->get(q, parent); @@ -433,6 +436,8 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) goto out; if ((cops = q->ops->cl_ops) == NULL) goto errout; + if (cops->tcf_chain == NULL) + goto errout; if (TC_H_MIN(tcm->tcm_parent)) { cl = cops->get(q, tcm->tcm_parent); if (cl == 0) |