lkml.org 
[lkml]   [2016]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:perf/core] tools lib bpf: Add private field for bpf_object
Commit-ID:  10931d2413478239bdceac5546cce85d7a497a4e
Gitweb: http://git.kernel.org/tip/10931d2413478239bdceac5546cce85d7a497a4e
Author: Wang Nan <wangnan0@huawei.com>
AuthorDate: Sat, 26 Nov 2016 07:03:26 +0000
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 29 Nov 2016 12:09:41 -0300

tools lib bpf: Add private field for bpf_object

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

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Joe Stringer <joe@ovn.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-3-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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,
\
 
 \ /
  Last update: 2016-12-02 11:38    [W:0.276 / U:1.096 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site