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[PATCH v2 06/10] bpf tools: Support new map operations

From Wang Nan <wangnan0@huawei.com>
Newsgroups linux.kernel
Subject [PATCH v2 06/10] bpf tools: Support new map operations
Date 2015-12-17 07:20 +0100
Message-ID <qGA4V-3Zu-3@gated-at.bofh.it> (permalink)
References <qGziz-3tt-31@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Add bpf_map_lookup_elem(), bpf_map_delete_elem() and bpf_map_get_next_key()
to libbpf so it can issue all BPF map operations.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
---

v1 -> v2: Remove tailing whitespaces.

---
 tools/lib/bpf/bpf.c | 32 ++++++++++++++++++++++++++++++++
 tools/lib/bpf/bpf.h |  4 ++++
 2 files changed, 36 insertions(+)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e0dccea..b8e7aaa 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -97,3 +97,35 @@ 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 = {
+		.map_fd = fd,
+		.key = ptr_to_u64(key),
+		.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 = {
+		.map_fd = fd,
+		.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 = {
+		.map_fd = fd,
+		.key = ptr_to_u64(key),
+		.next_key = ptr_to_u64(next_key),
+	};
+
+	return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 01a421a..3d22048 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -23,4 +23,8 @@ int bpf_load_program(enum bpf_prog_type type, const 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);
 #endif
-- 
1.8.3.4

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Thread

[PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF operations Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 01/10] bpf samples: bpf: Fix tracex5_kern.c compiling error Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 05/10] bpf tools: Support load different type of programs Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 03/10] bpf tools: Add const decoretor to 'license' and 'insns' for bpf_load_program() Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 02/10] bpf tools: Define LD and RM in Makefile for 'make -R' Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 06/10] bpf tools: Support new map operations Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
    Re: [PATCH 06/10] bpf tools: Support new map operations "Wangnan (F)" <wangnan0@huawei.com> - 2015-12-17 07:10 +0100
    [PATCH v2 06/10] bpf tools: Support new map operations Wang Nan <wangnan0@huawei.com> - 2015-12-17 07:20 +0100
  [PATCH 07/10] bpf tools: Support BPF_OBJ_PIN and BPF_OBJ_GET Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:30 +0100
  [PATCH 09/10] bpf samples: Uses libbpf in tools/lib to deal with BPF operations Wang Nan <wangnan0@huawei.com> - 2015-12-17 06:40 +0100
  Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-17 07:40 +0100
    Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations "Wangnan (F)" <wangnan0@huawei.com> - 2015-12-17 08:00 +0100
      Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-17 08:10 +0100
        Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-17 09:30 +0100
          Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations "Wangnan (F)" <wangnan0@huawei.com> - 2015-12-17 11:20 +0100
            Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-17 14:50 +0100
              Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations "Wangnan (F)" <wangnan0@huawei.com> - 2015-12-18 04:10 +0100
                Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-18 10:00 +0100
                [PATCH] tools build: Output more data during feature detection Wang Nan <wangnan0@huawei.com> - 2015-12-18 12:00 +0100
                Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations "Wangnan (F)" <wangnan0@huawei.com> - 2015-12-18 12:10 +0100
                Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-18 14:00 +0100
                Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF operations pi3orama <pi3orama@163.com> - 2015-12-18 15:20 +0100
                Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF  operations Daniel Wagner <daniel.wagner@bmw-carit.de> - 2015-12-18 15:30 +0100

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