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bpf: Improve socket lookup reuseport documentation 

Improve the wording around socket lookup for reuseport sockets, and
ensure that both bpf.h headers are in sync.

Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Joe Stringer 2018-11-30 15:32:21 -08:00 committed by Alexei Starovoitov
parent f71c6143c2
commit d74286d2c2
2 changed files with 8 additions and 4 deletions
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4
include/uapi/linux/bpf.h
View File

@ -2203,6 +2203,8 @@ union bpf_attr {
* **CONFIG_NET** configuration option. * **CONFIG_NET** configuration option.
* Return * Return
* Pointer to *struct bpf_sock*, or NULL in case of failure. * Pointer to *struct bpf_sock*, or NULL in case of failure.
* For sockets with reuseport option, the *struct bpf_sock*
* result is from reuse->socks[] using the hash of the tuple.
* *
* struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) * struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
* Description * Description
@ -2237,6 +2239,8 @@ union bpf_attr {
* **CONFIG_NET** configuration option. * **CONFIG_NET** configuration option.
* Return * Return
* Pointer to *struct bpf_sock*, or NULL in case of failure. * Pointer to *struct bpf_sock*, or NULL in case of failure.
* For sockets with reuseport option, the *struct bpf_sock*
* result is from reuse->socks[] using the hash of the tuple.
* *
* int bpf_sk_release(struct bpf_sock *sk) * int bpf_sk_release(struct bpf_sock *sk)
* Description * Description

8
tools/include/uapi/linux/bpf.h
View File

@ -2203,8 +2203,8 @@ union bpf_attr {
* **CONFIG_NET** configuration option. * **CONFIG_NET** configuration option.
* Return * Return
* Pointer to *struct bpf_sock*, or NULL in case of failure. * Pointer to *struct bpf_sock*, or NULL in case of failure.
* For sockets with reuseport option, *struct bpf_sock* * For sockets with reuseport option, the *struct bpf_sock*
* return is from reuse->socks[] using hash of the packet. * result is from reuse->socks[] using the hash of the tuple.
* *
* struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags) * struct bpf_sock *bpf_sk_lookup_udp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
* Description * Description
@ -2239,8 +2239,8 @@ union bpf_attr {
* **CONFIG_NET** configuration option. * **CONFIG_NET** configuration option.
* Return * Return
* Pointer to *struct bpf_sock*, or NULL in case of failure. * Pointer to *struct bpf_sock*, or NULL in case of failure.
* For sockets with reuseport option, *struct bpf_sock* * For sockets with reuseport option, the *struct bpf_sock*
* return is from reuse->socks[] using hash of the packet. * result is from reuse->socks[] using the hash of the tuple.
* *
* int bpf_sk_release(struct bpf_sock *sk) * int bpf_sk_release(struct bpf_sock *sk)
* Description * Description