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From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>,
	Marek Majkowski <marek@cloudflare.com>,
	Lorenz Bauer <lmb@cloudflare.com>,
	Alan Maguire <alan.maguire@oracle.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	David Miller <davem@davemloft.net>,
	netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [PATCH bpf-next v2 4/5] libbpf: Add syscall wrappers for BPF_PROG_CHAIN_* commands
Date: Fri, 04 Oct 2019 19:22:44 +0200	[thread overview]
Message-ID: <157020976478.1824887.2460017336894785970.stgit@alrua-x1> (raw)
In-Reply-To: <157020976030.1824887.7191033447861395957.stgit@alrua-x1>

From: Toke Høiland-Jørgensen <toke@redhat.com>

This adds simple syscall wrappers for the new BPF_PROG_CHAIN_* commands to
libbpf.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
---
 tools/lib/bpf/bpf.c      |   34 ++++++++++++++++++++++++++++++++++
 tools/lib/bpf/bpf.h      |    4 ++++
 tools/lib/bpf/libbpf.map |    3 +++
 3 files changed, 41 insertions(+)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index cbb933532981..23246fa169e7 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -703,3 +703,37 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
 
 	return err;
 }
+
+int bpf_prog_chain_add(int prev_prog_fd, __u32 retcode, int next_prog_fd) {
+	union bpf_attr attr = {};
+
+	attr.prev_prog_fd = prev_prog_fd;
+	attr.next_prog_fd = next_prog_fd;
+	attr.retcode = retcode;
+
+	return sys_bpf(BPF_PROG_CHAIN_ADD, &attr, sizeof(attr));
+}
+
+int bpf_prog_chain_del(int prev_prog_fd, __u32 retcode) {
+	union bpf_attr attr = {};
+
+	attr.prev_prog_fd = prev_prog_fd;
+	attr.retcode = retcode;
+
+	return sys_bpf(BPF_PROG_CHAIN_DEL, &attr, sizeof(attr));
+}
+
+int bpf_prog_chain_get(int prev_prog_fd, __u32 retcode, __u32 *prog_id) {
+	union bpf_attr attr = {};
+	int err;
+
+	attr.prev_prog_fd = prev_prog_fd;
+	attr.retcode = retcode;
+
+	err = sys_bpf(BPF_PROG_CHAIN_GET, &attr, sizeof(attr));
+
+	if (!err)
+		*prog_id = attr.next_prog_id;
+
+	return err;
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 0db01334740f..0300cb8c8bed 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -171,6 +171,10 @@ LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
 				 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
 				 __u64 *probe_offset, __u64 *probe_addr);
 
+LIBBPF_API int bpf_prog_chain_add(int prev_prog_fd, __u32 retcode, int next_prog_fd);
+LIBBPF_API int bpf_prog_chain_del(int prev_prog_fd, __u32 retcode);
+LIBBPF_API int bpf_prog_chain_get(int prev_prog_fd, __u32 retcode, __u32 *prog_id);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 8d10ca03d78d..9c483c554054 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -192,4 +192,7 @@ LIBBPF_0.0.5 {
 } LIBBPF_0.0.4;
 
 LIBBPF_0.0.6 {
+		bpf_prog_chain_add;
+		bpf_prog_chain_del;
+		bpf_prog_chain_get;
 } LIBBPF_0.0.5;


  parent reply	other threads:[~2019-10-04 17:22 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-04 17:22 [PATCH bpf-next v2 0/5] xdp: Support multiple programs on a single interface through chain calls Toke Høiland-Jørgensen
2019-10-04 17:22 ` [PATCH bpf-next v2 1/5] bpf: Support injecting chain calls into BPF programs on load Toke Høiland-Jørgensen
2019-10-04 20:51   ` kbuild test robot
2019-10-04 21:12   ` kbuild test robot
2019-10-04 23:17   ` Jakub Kicinski
2019-10-05 10:29     ` Toke Høiland-Jørgensen
2019-10-06  3:39       ` Jakub Kicinski
2019-10-06 15:52         ` Toke Høiland-Jørgensen
2019-10-05 10:32     ` Toke Høiland-Jørgensen
2019-10-07  0:27   ` Alexei Starovoitov
2019-10-07 10:11     ` Toke Høiland-Jørgensen
2019-10-07 20:22       ` Daniel Borkmann
2019-10-08  9:00         ` Toke Høiland-Jørgensen
2019-10-07 20:45       ` Alexei Starovoitov
2019-10-08  9:02         ` Toke Høiland-Jørgensen
2019-10-04 17:22 ` [PATCH bpf-next v2 2/5] bpf: Add support for setting chain call sequence for programs Toke Høiland-Jørgensen
2019-10-04 23:18   ` Jakub Kicinski
2019-10-05 10:30     ` Toke Høiland-Jørgensen
2019-10-04 17:22 ` [PATCH bpf-next v2 3/5] tools: Update bpf.h header for program chain calls Toke Høiland-Jørgensen
2019-10-04 17:22 ` Toke Høiland-Jørgensen [this message]
2019-10-04 17:22 ` [PATCH bpf-next v2 5/5] selftests: Add tests for XDP " Toke Høiland-Jørgensen

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