diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/sockopt_sk.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/sockopt_sk.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/tools/testing/selftests/bpf/progs/sockopt_sk.c b/tools/testing/selftests/bpf/progs/sockopt_sk.c index c8d810010a94..cb990a7d3d45 100644 --- a/tools/testing/selftests/bpf/progs/sockopt_sk.c +++ b/tools/testing/selftests/bpf/progs/sockopt_sk.c @@ -32,6 +32,12 @@ int _getsockopt(struct bpf_sockopt *ctx) __u8 *optval_end = ctx->optval_end; __u8 *optval = ctx->optval; struct sockopt_sk *storage; + struct bpf_sock *sk; + + /* Bypass AF_NETLINK. */ + sk = ctx->sk; + if (sk && sk->family == AF_NETLINK) + goto out; /* Make sure bpf_get_netns_cookie is callable. */ @@ -46,8 +52,7 @@ int _getsockopt(struct bpf_sockopt *ctx) * let next BPF program in the cgroup chain or kernel * handle it. */ - ctx->optlen = 0; /* bypass optval>PAGE_SIZE */ - return 1; + goto out; } if (ctx->level == SOL_SOCKET && ctx->optname == SO_SNDBUF) { @@ -55,7 +60,7 @@ int _getsockopt(struct bpf_sockopt *ctx) * let next BPF program in the cgroup chain or kernel * handle it. */ - return 1; + goto out; } if (ctx->level == SOL_TCP && ctx->optname == TCP_CONGESTION) { @@ -63,7 +68,7 @@ int _getsockopt(struct bpf_sockopt *ctx) * let next BPF program in the cgroup chain or kernel * handle it. */ - return 1; + goto out; } if (ctx->level == SOL_TCP && ctx->optname == TCP_ZEROCOPY_RECEIVE) { @@ -79,7 +84,7 @@ int _getsockopt(struct bpf_sockopt *ctx) if (((struct tcp_zerocopy_receive *)optval)->address != 0) return 0; /* unexpected data */ - return 1; + goto out; } if (ctx->level == SOL_IP && ctx->optname == IP_FREEBIND) { @@ -123,6 +128,12 @@ int _getsockopt(struct bpf_sockopt *ctx) ctx->optlen = 1; return 1; + +out: + /* optval larger than PAGE_SIZE use kernel's buffer. */ + if (ctx->optlen > page_size) + ctx->optlen = 0; + return 1; } SEC("cgroup/setsockopt") @@ -131,6 +142,12 @@ int _setsockopt(struct bpf_sockopt *ctx) __u8 *optval_end = ctx->optval_end; __u8 *optval = ctx->optval; struct sockopt_sk *storage; + struct bpf_sock *sk; + + /* Bypass AF_NETLINK. */ + sk = ctx->sk; + if (sk && sk->family == AF_NETLINK) + goto out; /* Make sure bpf_get_netns_cookie is callable. */ @@ -212,4 +229,10 @@ int _setsockopt(struct bpf_sockopt *ctx) */ return 1; + +out: + /* optval larger than PAGE_SIZE use kernel's buffer. */ + if (ctx->optlen > page_size) + ctx->optlen = 0; + return 1; } |