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UPSTREAM: bpf: Change bpf_sk_storage_*() to accept ARG_PTR_TO_BTF_ID_SOCK_COMMON

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This patch changes the bpf_sk_storage_*() to take
ARG_PTR_TO_BTF_ID_SOCK_COMMON such that they will work with the pointer
returned by the bpf_skc_to_*() helpers also.

A micro benchmark has been done on a "cgroup_skb/egress" bpf program
which does a bpf_sk_storage_get().  It was driven by netperf doing
a 4096 connected UDP_STREAM test with 64bytes packet.
The stats from "kernel.bpf_stats_enabled" shows no meaningful difference.

The sk_storage_get_btf_proto, sk_storage_delete_btf_proto,
btf_sk_storage_get_proto, and btf_sk_storage_delete_proto are
no longer needed, so they are removed.

Change-Id: I4547813f0fe3b60b277c508d02acc6d783a309ed
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Lorenz Bauer <lmb@cloudflare.com>
Link: https://lore.kernel.org/bpf/20200925000402.3856307-1-kafai@fb.com
This commit is contained in:
Martin KaFai Lau 2020-09-24 17:04:02 -07:00 • committed by basamaryan
commit 43e31c273d
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6 changed files with 12 additions and 48 deletions
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include/uapi/linux/bpf.h
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@ -2863,6 +2863,7 @@ union bpf_attr {
* 0 on success.
*
* **-ENOENT** if the bpf-local-storage cannot be found.
* **-EINVAL** if sk is not a fullsock (e.g. a request_sock).
*
* long bpf_send_signal(u32 sig)
* Description