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Add a eBPF helper function to retrieve socket uid

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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>
This commit is contained in:
Chenbo Feng 2017-03-22 17:27:35 -07:00 • committed by David S. Miller
parent 91b8270f2a
commit 6acc5c2910
3 changed files with 32 additions and 2 deletions
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3
tools/include/uapi/linux/bpf.h
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@ -507,7 +507,8 @@ 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