Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966439AbcKOEPw (ORCPT ); Mon, 14 Nov 2016 23:15:52 -0500 Received: from szxga02-in.huawei.com ([119.145.14.65]:54610 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755259AbcKOEIF (ORCPT ); Mon, 14 Nov 2016 23:08:05 -0500 From: Wang Nan To: , CC: , , , , Wang Nan Subject: [PATCH 05/34] tools lib bpf: Add missing bpf map functions Date: Tue, 15 Nov 2016 04:05:48 +0000 Message-ID: <20161115040617.69788-6-wangnan0@huawei.com> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161115040617.69788-1-wangnan0@huawei.com> References: <20161115040617.69788-1-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2411 Lines: 93 Add more BPF map operations to libbpf. Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: Arnaldo Carvalho de Melo Cc: Li Zefan --- tools/lib/bpf/bpf.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/bpf.h | 7 +++++++ 2 files changed, 63 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 4212ed6..e966248 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -110,3 +110,59 @@ int bpf_map_update_elem(int fd, void *key, void *value, return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); } + +int bpf_map_lookup_elem(int fd, void *key, void *value) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.key = ptr_to_u64(key); + attr.value = ptr_to_u64(value); + + return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); +} + +int bpf_map_delete_elem(int fd, void *key) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.key = ptr_to_u64(key); + + return sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); +} + +int bpf_map_get_next_key(int fd, void *key, void *next_key) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.key = ptr_to_u64(key); + attr.next_key = ptr_to_u64(next_key); + + return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr)); +} + +int bpf_map_pin(int fd, const char *pathname) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.pathname = ptr_to_u64((void *)pathname); + attr.bpf_fd = fd; + + return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr)); +} + +int bpf_map_get(const char *pathname) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.pathname = ptr_to_u64((void *)pathname); + + return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr)); +} diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index e8ba540..5b3e52b 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -35,4 +35,11 @@ int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns, int bpf_map_update_elem(int fd, void *key, void *value, u64 flags); + +int bpf_map_lookup_elem(int fd, void *key, void *value); +int bpf_map_delete_elem(int fd, void *key); +int bpf_map_get_next_key(int fd, void *key, void *next_key); +int bpf_map_pin(int fd, const char *pathname); +int bpf_map_get(const char *pathname); + #endif -- 2.10.1