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| author |   Lawrence Brakmo <brakmo@fb.com> | 2017-06-30 20:02:46 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-07-01 16:15:13 -0700 |
| commit | 8c4b4c7e9ff0447995750d9329949fa082520269 (patch) | |
| tree | b4215d293911949d5373baef37c29ca0d09df1e3 /include/uapi/linux | |
| parent | bpf: Sample bpf program to set initial window (diff) | |
| download | linux-dev-8c4b4c7e9ff0447995750d9329949fa082520269.tar.xz linux-dev-8c4b4c7e9ff0447995750d9329949fa082520269.zip | |
bpf: Add setsockopt helper function to bpf
Added support for calling a subset of socket setsockopts from
BPF_PROG_TYPE_SOCK_OPS programs. The code was duplicated rather
than making the changes to call the socket setsockopt function because
the changes required would have been larger.
The ops supported are:
SO_RCVBUF
SO_SNDBUF
SO_MAX_PACING_RATE
SO_PRIORITY
SO_RCVLOWAT
SO_MARK
Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/bpf.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 94d7ded1a6cf..dd43b22758d6 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -520,6 +520,17 @@ union bpf_attr { * Set full skb->hash. * @skb: pointer to skb * @hash: hash to set + * + * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen) + * Calls setsockopt. Not all opts are available, only those with + * integer optvals plus TCP_CONGESTION. + * Supported levels: SOL_SOCKET and IPROTO_TCP + * @bpf_socket: pointer to bpf_socket + * @level: SOL_SOCKET or IPROTO_TCP + * @optname: option name + * @optval: pointer to option value + * @optlen: length of optval in byes + * Return: 0 or negative error */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -570,7 +581,8 @@ union bpf_attr { FN(probe_read_str), \ FN(get_socket_cookie), \ FN(get_socket_uid), \ - FN(set_hash), + FN(set_hash), \ + FN(setsockopt), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call |