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From: Wang Nan <wangnan0@huawei.com>
To: <acme@redhat.com>, <ast@fb.com>
Cc: <lizefan@huawei.com>, <hekuang@huawei.com>,
	<linux-kernel@vger.kernel.org>, <pi3orama@163.com>,
	Wang Nan <wangnan0@huawei.com>
Subject: [PATCH 06/34] tools lib bpf: Add private field for bpf_object
Date: Tue, 15 Nov 2016 04:05:49 +0000	[thread overview]
Message-ID: <20161115040617.69788-7-wangnan0@huawei.com> (raw)
In-Reply-To: <20161115040617.69788-1-wangnan0@huawei.com>

Like other classes defined in libbpf.h (like map and program), allow
'object' class has its own private data.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Li Zefan <lizefan@huawei.com>
---
 tools/lib/bpf/libbpf.c | 23 +++++++++++++++++++++++
 tools/lib/bpf/libbpf.h |  5 +++++
 2 files changed, 28 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 96a2b2f..866d5cd 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -229,6 +229,10 @@ struct bpf_object {
 	 * all objects.
 	 */
 	struct list_head list;
+
+	void *priv;
+	bpf_object_clear_priv_t clear_priv;
+
 	char path[];
 };
 #define obj_elf_valid(o)	((o)->efile.elf)
@@ -1229,6 +1233,9 @@ void bpf_object__close(struct bpf_object *obj)
 	if (!obj)
 		return;
 
+	if (obj->clear_priv)
+		obj->clear_priv(obj, obj->priv);
+
 	bpf_object__elf_finish(obj);
 	bpf_object__unload(obj);
 
@@ -1282,6 +1289,22 @@ unsigned int bpf_object__kversion(struct bpf_object *obj)
 	return obj ? obj->kern_version : 0;
 }
 
+int bpf_object__set_priv(struct bpf_object *obj, void *priv,
+			 bpf_object_clear_priv_t clear_priv)
+{
+	if (obj->priv && obj->clear_priv)
+		obj->clear_priv(obj, obj->priv);
+
+	obj->priv = priv;
+	obj->clear_priv = clear_priv;
+	return 0;
+}
+
+void *bpf_object__priv(struct bpf_object *obj)
+{
+	return obj ? obj->priv : ERR_PTR(-EINVAL);
+}
+
 struct bpf_program *
 bpf_program__next(struct bpf_program *prev, struct bpf_object *obj)
 {
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index dd7a513..0c0b012 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -79,6 +79,11 @@ struct bpf_object *bpf_object__next(struct bpf_object *prev);
 	     (pos) != NULL;				\
 	     (pos) = (tmp), (tmp) = bpf_object__next(tmp))
 
+typedef void (*bpf_object_clear_priv_t)(struct bpf_object *, void *);
+int bpf_object__set_priv(struct bpf_object *obj, void *priv,
+			 bpf_object_clear_priv_t clear_priv);
+void *bpf_object__priv(struct bpf_object *prog);
+
 /* Accessors of bpf_program. */
 struct bpf_program;
 struct bpf_program *bpf_program__next(struct bpf_program *prog,
-- 
2.10.1

  parent reply	other threads:[~2016-11-15  4:08 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-15  4:05 [PATCH 00/34] perf clang: Builtin clang and perfhook support Wang Nan
2016-11-15  4:05 ` [PATCH 01/34] perf tools: Fix kernel version error in ubuntu Wang Nan
2016-11-25 17:20   ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-15  4:05 ` [PATCH 02/34] perf record: Fix segfault when running with suid and kptr_restrict is 1 Wang Nan
2016-11-25 17:21   ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-15  4:05 ` [PATCH 03/34] tools perf: Add missing struct defeinition in probe_event.h Wang Nan
2016-11-25 17:21   ` [tip:perf/core] perf tools: Add missing struct definition " tip-bot for Wang Nan
2016-11-15  4:05 ` [PATCH 04/34] tools lib bpf: fix maps resolution Wang Nan
2016-11-25 17:22   ` [tip:perf/core] tools lib bpf: Fix " tip-bot for Eric Leblond
2016-11-15  4:05 ` [PATCH 05/34] tools lib bpf: Add missing bpf map functions Wang Nan
2016-11-17  3:23   ` Wangnan (F)
2016-11-25 14:31     ` Arnaldo Carvalho de Melo
2016-11-15  4:05 ` Wang Nan [this message]
2016-11-15  4:05 ` [PATCH 07/34] tools lib bpf: Retrive bpf_map through offset of bpf_map_def Wang Nan
2016-11-15  4:05 ` [PATCH 08/34] perf tools: Introduce perf hooks Wang Nan
2016-11-15  4:05 ` [PATCH 09/34] perf tools: Pass context to perf hook functions Wang Nan
2016-11-15  4:05 ` [PATCH 10/34] perf llvm: Extract helpers in llvm-utils.c Wang Nan
2016-11-15  4:05 ` [PATCH 11/34] tools build: Add feature detection for LLVM Wang Nan
2016-11-15  4:05 ` [PATCH 12/34] tools build: Add feature detection for clang Wang Nan
2016-11-15  4:05 ` [PATCH 13/34] perf build: Add clang and llvm compile and linking support Wang Nan
2016-11-15  4:05 ` [PATCH 14/34] perf clang: Add builtin clang support ant test case Wang Nan
2016-11-15  4:05 ` [PATCH 15/34] perf clang: Use real file system for #include Wang Nan
2016-11-15  4:05 ` [PATCH 16/34] perf clang: Allow passing CFLAGS to builtin clang Wang Nan
2016-11-15  4:06 ` [PATCH 17/34] perf clang: Update test case to use real BPF script Wang Nan
2016-11-15  4:06 ` [PATCH 18/34] perf clang: Support compile IR to BPF object and add testcase Wang Nan
2016-11-15  4:06 ` [PATCH 19/34] perf clang: Compile BPF script use builtin clang support Wang Nan
2016-11-15  4:06 ` [PATCH 20/34] perf clang: Pass full path to builtin clang Wang Nan
2016-11-15  4:06 ` [PATCH 21/34] perf clang: Pass CFLAGS " Wang Nan
2016-11-15  4:06 ` [PATCH 22/34] perf clang jit: Wrap llvm::Module using PerfModule Wang Nan
2016-11-15  4:06 ` [PATCH 23/34] perf clang jit: Insignt BPF and JIT functions in a Module Wang Nan
2016-11-15  4:06 ` [PATCH 24/34] perf clang jit: add PerfModule::doJIT to JIT perfhook functions Wang Nan
2016-11-15  4:06 ` [PATCH 25/34] perf clang jit: Export functions for jitted code Wang Nan
2016-11-15  4:06 ` [PATCH 26/34] perf clang jit: Actually JIT and hook in bpf loader Wang Nan
2016-11-15  4:06 ` [PATCH 27/34] perf clang jit: Collect the lowest address in maps section as map_base Wang Nan
2016-11-15  4:06 ` [PATCH 28/34] perf clang jit: Access BPF map Wang Nan
2016-11-15  4:06 ` [PATCH 29/34] perf clang jit: Allow jitted perf hook access BPF maps Wang Nan
2016-11-15  4:06 ` [PATCH 30/34] perf clang: Link BPF functions declaration into perf Wang Nan
2016-11-15  4:06 ` [PATCH 31/34] perf clang: Declare BPF functions for BPF scripts automatically Wang Nan
2016-11-15  4:06 ` [PATCH 32/34] perf clang: Include helpers to BPF scripts Wang Nan
2016-11-15  4:06 ` [PATCH 33/34] perf clang builtin: Define hook helpers by default Wang Nan
2016-11-15  4:06 ` [PATCH 34/34] perf clang git: Export getpid() to perf hook Wang Nan
2016-11-15  4:32 ` [PATCH 00/34] perf clang: Builtin clang and perfhook support Wangnan (F)

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