diff options
| author |   Chenbo Feng <fengc@google.com> | 2017-03-22 17:27:35 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-03-23 17:01:02 -0700 |
| commit | 6acc5c2910689fc6ee181bf63085c5efff6a42bd (patch) | |
| tree | 049fec629362ea0f3017381bc96f4e117ed3e903 /include/uapi/linux/bpf.h | |
| parent | Add a helper function to get socket cookie in eBPF (diff) | |
| download | linux-dev-6acc5c2910689fc6ee181bf63085c5efff6a42bd.tar.xz linux-dev-6acc5c2910689fc6ee181bf63085c5efff6a42bd.zip | |
Add a eBPF helper function to retrieve socket uid
Returns the owner uid of the socket inside a sk_buff. This is useful to
perform per-UID accounting of network traffic or per-UID packet
filtering. The socket need to be a fullsock otherwise overflowuid is
returned.
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/bpf.h')
| -rw-r--r-- | include/uapi/linux/bpf.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index cdfc5595fbc1..28317a04c34d 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -465,6 +465,12 @@ union bpf_attr { * @skb: pointer to skb * Return: 8 Bytes non-decreasing number on success or 0 if the socket * field is missing inside sk_buff + * + * u32 bpf_get_socket_uid(skb) + * Get the owner uid of the socket stored inside sk_buff. + * @skb: pointer to skb + * Return: uid of the socket owner on success or 0 if the socket pointer + * inside sk_buff is NULL */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -513,7 +519,8 @@ union bpf_attr { FN(skb_change_head), \ FN(xdp_adjust_head), \ FN(probe_read_str), \ - FN(get_socket_cookie), + FN(get_socket_cookie), \ + FN(get_socket_uid), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call |