netdev - [PATCH v8 bpf-next 2/3] libbpf: add support for command BPF_ENABLE

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Message-ID: <20200429064543.634465-3-songliubraving@fb.com>
Date:   Tue, 28 Apr 2020 23:45:42 -0700
From:   Song Liu <songliubraving@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <kernel-team@...com>,
        Song Liu <songliubraving@...com>
Subject: [PATCH v8 bpf-next 2/3] libbpf: add support for command BPF_ENABLE_STATS

bpf_enable_stats() is added to enable given stats.

Signed-off-by: Song Liu <songliubraving@...com>
---
 tools/lib/bpf/bpf.c      | 10 ++++++++++
 tools/lib/bpf/bpf.h      |  1 +
 tools/lib/bpf/libbpf.map |  1 +
 3 files changed, 12 insertions(+)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 8f2f0958d446..43322f0d6c7f 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -841,3 +841,13 @@ int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
 
 	return err;
 }
+
+int bpf_enable_stats(enum bpf_stats_type type)
+{
+	union bpf_attr attr;
+
+	memset(&attr, 0, sizeof(attr));
+	attr.enable_stats.type = type;
+
+	return sys_bpf(BPF_ENABLE_STATS, &attr, sizeof(attr));
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 335b457b3a25..1901b2777854 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -231,6 +231,7 @@ LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
 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_enable_stats(enum bpf_stats_type type);
 
 #ifdef __cplusplus
 } /* extern "C" */
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 7cd49aa38005..e03bd4db827e 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -257,6 +257,7 @@ LIBBPF_0.0.8 {
 
 LIBBPF_0.0.9 {
 	global:
+		bpf_enable_stats;
 		bpf_link_get_fd_by_id;
 		bpf_link_get_next_id;
 } LIBBPF_0.0.8;
-- 
2.24.1