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authorStanislav Fomichev <sdf@google.com>2019-04-25 14:37:23 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2019-04-25 23:49:06 +0200
commit118c8e9ae629d35fa9b3d27a7b9d59298b1b4183 (patch)
tree7ac43c744fec6cdd282557b4c56d30141dba3161 /include/linux/skbuff.h
parentead442a0f9aaecb4df3eb4055d1e2568b4fc0ae6 (diff)
bpf: support BPF_PROG_QUERY for BPF_FLOW_DISSECTOR attach_type
target_fd is target namespace. If there is a flow dissector BPF program attached to that namespace, its (single) id is returned. v5: * drop net ref right after rcu unlock (Daniel Borkmann) v4: * add missing put_net (Jann Horn) v3: * add missing inline to skb_flow_dissector_prog_query static def (kbuild test robot <lkp@intel.com>) v2: * don't sleep in rcu critical section (Jakub Kicinski) * check input prog_cnt (exit early) Cc: Jann Horn <jannh@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 998256c2820b..6d58fa8a65fd 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1258,11 +1258,19 @@ void skb_flow_dissector_init(struct flow_dissector *flow_dissector,
unsigned int key_count);
#ifdef CONFIG_NET
+int skb_flow_dissector_prog_query(const union bpf_attr *attr,
+ union bpf_attr __user *uattr);
int skb_flow_dissector_bpf_prog_attach(const union bpf_attr *attr,
struct bpf_prog *prog);
int skb_flow_dissector_bpf_prog_detach(const union bpf_attr *attr);
#else
+static inline int skb_flow_dissector_prog_query(const union bpf_attr *attr,
+ union bpf_attr __user *uattr)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int skb_flow_dissector_bpf_prog_attach(const union bpf_attr *attr,
struct bpf_prog *prog)
{