xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf: support BPF_PROG_QUERY for BPF_FLOW_DISSECTOR attach_type

Browse Source 
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>
This commit is contained in:
Stanislav Fomichev
2019-04-25 14:37:23 -07:00
committed by Daniel Borkmann
parent ead442a0f9
commit 118c8e9ae6
3 changed files with 49 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/skbuff.h
View File

@@ -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)
{