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| author |   David Ahern <dsa@cumulusnetworks.com> | 2016-12-01 08:48:04 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-12-02 13:46:08 -0500 |
| commit | 61023658760032e97869b07d54be9681d2529e77 (patch) | |
| tree | 9b10a9d2a8b5820450298f9bda8f3c23fbf66b57 /include/linux/bpf-cgroup.h | |
| parent | bpf: Refactor cgroups code in prep for new type (diff) | |
| download | linux-dev-61023658760032e97869b07d54be9681d2529e77.tar.xz linux-dev-61023658760032e97869b07d54be9681d2529e77.zip | |
bpf: Add new cgroup attach type to enable sock modifications
Add new cgroup based program type, BPF_PROG_TYPE_CGROUP_SOCK. Similar to
BPF_PROG_TYPE_CGROUP_SKB programs can be attached to a cgroup and run
any time a process in the cgroup opens an AF_INET or AF_INET6 socket.
Currently only sk_bound_dev_if is exported to userspace for modification
by a bpf program.
This allows a cgroup to be configured such that AF_INET{6} sockets opened
by processes are automatically bound to a specific device. In turn, this
enables the running of programs that do not support SO_BINDTODEVICE in a
specific VRF context / L3 domain.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/bpf-cgroup.h')
| -rw-r--r-- | include/linux/bpf-cgroup.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h index af2ca8b432c0..7b6e5d168c95 100644 --- a/include/linux/bpf-cgroup.h +++ b/include/linux/bpf-cgroup.h @@ -40,6 +40,9 @@ int __cgroup_bpf_run_filter_skb(struct sock *sk, struct sk_buff *skb, enum bpf_attach_type type); +int __cgroup_bpf_run_filter_sk(struct sock *sk, + enum bpf_attach_type type); + /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */ #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) \ ({ \ @@ -63,6 +66,16 @@ int __cgroup_bpf_run_filter_skb(struct sock *sk, __ret; \ }) +#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \ +({ \ + int __ret = 0; \ + if (cgroup_bpf_enabled && sk) { \ + __ret = __cgroup_bpf_run_filter_sk(sk, \ + BPF_CGROUP_INET_SOCK_CREATE); \ + } \ + __ret; \ +}) + #else struct cgroup_bpf {}; @@ -72,6 +85,7 @@ static inline void cgroup_bpf_inherit(struct cgroup *cgrp, #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; }) #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; }) +#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; }) #endif /* CONFIG_CGROUP_BPF */ |