From: Peter Oskolkov <posk@google.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
netdev@vger.kernel.org
Cc: Peter Oskolkov <posk@posk.io>, David Ahern <dsahern@gmail.com>,
Willem de Bruijn <willemb@google.com>,
Peter Oskolkov <posk@google.com>
Subject: [PATCH bpf-next v10 6/7] bpf: sync <kdir>/include/.../bpf.h with tools/include/.../bpf.h
Date: Tue, 12 Feb 2019 09:32:46 -0800 [thread overview]
Message-ID: <20190212173247.121342-7-posk@google.com> (raw)
In-Reply-To: <20190212173247.121342-1-posk@google.com>
This patch copies changes in bpf.h done by a previous patch
in this patchset from the kernel uapi include dir into tools
uapi include dir.
Signed-off-by: Peter Oskolkov <posk@google.com>
---
tools/include/uapi/linux/bpf.h | 26 ++++++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 25c8c0e62ecf..bcdd2474eee7 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2016,6 +2016,19 @@ union bpf_attr {
* Only works if *skb* contains an IPv6 packet. Insert a
* Segment Routing Header (**struct ipv6_sr_hdr**) inside
* the IPv6 header.
+ * **BPF_LWT_ENCAP_IP**
+ * IP encapsulation (GRE/GUE/IPIP/etc). The outer header
+ * must be IPv4 or IPv6, followed by zero or more
+ * additional headers, up to LWT_BPF_MAX_HEADROOM total
+ * bytes in all prepended headers. Please note that
+ * if skb_is_gso(skb) is true, no more than two headers
+ * can be prepended, and the inner header, if present,
+ * should be either GRE or UDP/GUE.
+ *
+ * BPF_LWT_ENCAP_SEG6*** types can be called by bpf programs of
+ * type BPF_PROG_TYPE_LWT_IN; BPF_LWT_ENCAP_IP type can be called
+ * by bpf programs of types BPF_PROG_TYPE_LWT_IN and
+ * BPF_PROG_TYPE_LWT_XMIT.
*
* A call to this helper is susceptible to change the underlaying
* packet buffer. Therefore, at load time, all checks on pointers
@@ -2517,7 +2530,8 @@ enum bpf_hdr_start_off {
/* Encapsulation type for BPF_FUNC_lwt_push_encap helper. */
enum bpf_lwt_encap_mode {
BPF_LWT_ENCAP_SEG6,
- BPF_LWT_ENCAP_SEG6_INLINE
+ BPF_LWT_ENCAP_SEG6_INLINE,
+ BPF_LWT_ENCAP_IP,
};
#define __bpf_md_ptr(type, name) \
@@ -2606,7 +2620,15 @@ enum bpf_ret_code {
BPF_DROP = 2,
/* 3-6 reserved */
BPF_REDIRECT = 7,
- /* >127 are reserved for prog type specific return codes */
+ /* >127 are reserved for prog type specific return codes.
+ *
+ * BPF_LWT_REROUTE: used by BPF_PROG_TYPE_LWT_IN and
+ * BPF_PROG_TYPE_LWT_XMIT to indicate that skb had been
+ * changed and should be routed based on its new L3 header.
+ * (This is an L3 redirect, as opposed to L2 redirect
+ * represented by BPF_REDIRECT above).
+ */
+ BPF_LWT_REROUTE = 128,
};
struct bpf_sock {
--
2.20.1.791.gb4d0f1c61a-goog
next prev parent reply other threads:[~2019-02-12 17:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 17:32 [PATCH bpf-next v10 0/7] bpf: add BPF_LWT_ENCAP_IP option to bpf_lwt_push_encap Peter Oskolkov
2019-02-12 17:32 ` [PATCH bpf-next v10 1/7] bpf: add plumbing for BPF_LWT_ENCAP_IP in bpf_lwt_push_encap Peter Oskolkov
2019-02-12 17:32 ` [PATCH bpf-next v10 2/7] bpf: implement BPF_LWT_ENCAP_IP mode " Peter Oskolkov
2019-02-12 17:32 ` [PATCH bpf-next v10 3/7] bpf: handle GSO " Peter Oskolkov
2019-02-12 17:32 ` [PATCH bpf-next v10 4/7] ipv6_stub: add ipv6_route_input stub/proxy Peter Oskolkov
2019-02-12 17:32 ` [PATCH bpf-next v10 5/7] bpf: add handling of BPF_LWT_REROUTE to lwt_bpf.c Peter Oskolkov
2019-02-13 2:58 ` David Ahern
2019-02-13 19:57 ` Peter Oskolkov
2019-02-13 20:11 ` David Ahern
2019-02-13 20:41 ` Peter Oskolkov
2019-02-12 17:32 ` Peter Oskolkov [this message]
2019-02-12 17:32 ` [PATCH bpf-next v10 7/7] selftests: bpf: add test_lwt_ip_encap selftest Peter Oskolkov
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