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| author | Nikita V. Shirokov <tehnerd@fb.com> | 2018-03-26 08:36:57 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-28 21:05:35 +0200 |
| commit | 6f5c39fa5cd4a78c5432021e981aa8f79437a32c (patch) | |
| tree | ca8000b083f974d4d87861ea89cb43e25049fa77 /net | |
| parent | 20cfb7a04f0a8b7f8f45cf630e23524d51bb3cd9 (diff) | |
| download | linux-6f5c39fa5cd4a78c5432021e981aa8f79437a32c.tar.gz linux-6f5c39fa5cd4a78c5432021e981aa8f79437a32c.tar.bz2 linux-6f5c39fa5cd4a78c5432021e981aa8f79437a32c.zip | |
bpf: Add sock_ops R/W access to ipv4 tos
Sample usage for tos ...
bpf_getsockopt(skops, SOL_IP, IP_TOS, &v, sizeof(v))
... where skops is a pointer to the ctx (struct bpf_sock_ops).
Signed-off-by: Nikita V. Shirokov <tehnerd@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 00c711c5f1a2..afd825534ac4 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3462,6 +3462,27 @@ BPF_CALL_5(bpf_setsockopt, struct bpf_sock_ops_kern *, bpf_sock, ret = -EINVAL; } #ifdef CONFIG_INET + } else if (level == SOL_IP) { + if (optlen != sizeof(int) || sk->sk_family != AF_INET) + return -EINVAL; + + val = *((int *)optval); + /* Only some options are supported */ + switch (optname) { + case IP_TOS: + if (val < -1 || val > 0xff) { + ret = -EINVAL; + } else { + struct inet_sock *inet = inet_sk(sk); + + if (val == -1) + val = 0; + inet->tos = val; + } + break; + default: + ret = -EINVAL; + } #if IS_ENABLED(CONFIG_IPV6) } else if (level == SOL_IPV6) { if (optlen != sizeof(int) || sk->sk_family != AF_INET6) @@ -3561,6 +3582,20 @@ BPF_CALL_5(bpf_getsockopt, struct bpf_sock_ops_kern *, bpf_sock, } else { goto err_clear; } + } else if (level == SOL_IP) { + struct inet_sock *inet = inet_sk(sk); + + if (optlen != sizeof(int) || sk->sk_family != AF_INET) + goto err_clear; + + /* Only some options are supported */ + switch (optname) { + case IP_TOS: + *((int *)optval) = (int)inet->tos; + break; + default: + goto err_clear; + } #if IS_ENABLED(CONFIG_IPV6) } else if (level == SOL_IPV6) { struct ipv6_pinfo *np = inet6_sk(sk); |