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uapi: update bpf.h 

Updated upstream

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Stephen Hemminger 2020-02-28 13:55:38 -08:00
parent 31824e2299
commit b5a77cf701
1 changed files with 7 additions and 9 deletions
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16
include/uapi/linux/bpf.h
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@ -1045,9 +1045,9 @@ union bpf_attr {
* supports redirection to the egress interface, and accepts no * supports redirection to the egress interface, and accepts no
* flag at all. * flag at all.
* *
* The same effect can be attained with the more generic * The same effect can also be attained with the more generic
* **bpf_redirect_map**\ (), which requires specific maps to be * **bpf_redirect_map**\ (), which uses a BPF map to store the
* used but offers better performance. * redirect target instead of providing it directly to the helper.
* Return * Return
* For XDP, the helper returns **XDP_REDIRECT** on success or * For XDP, the helper returns **XDP_REDIRECT** on success or
* **XDP_ABORTED** on error. For other program types, the values * **XDP_ABORTED** on error. For other program types, the values
@ -1611,13 +1611,11 @@ union bpf_attr {
* the caller. Any higher bits in the *flags* argument must be * the caller. Any higher bits in the *flags* argument must be
* unset. * unset.
* *
* When used to redirect packets to net devices, this helper * See also bpf_redirect(), which only supports redirecting to an
* provides a high performance increase over **bpf_redirect**\ (). * ifindex, but doesn't require a map to do so.
* This is due to various implementation details of the underlying
* mechanisms, one of which is the fact that **bpf_redirect_map**\
* () tries to send packet as a "bulk" to the device.
* Return * Return
* **XDP_REDIRECT** on success, or **XDP_ABORTED** on error. * **XDP_REDIRECT** on success, or the value of the two lower bits
* of the **flags* argument on error.
* *
* int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags) * int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags)
* Description * Description