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| author | Joe Stringer <joe@ovn.org> | 2016-12-08 18:46:16 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-12-15 16:25:47 -0300 |
| commit | a5580c7f7a6d078696458d283df5d6547ad1c740 (patch) | |
| tree | 68c3e9b629a16ef97af98fd6eadb4bead6eafaa0 /tools | |
| parent | 83d994d02bf4594d6bfa9b2b67befb6cff7f9380 (diff) | |
| download | lwn-a5580c7f7a6d078696458d283df5d6547ad1c740.tar.gz lwn-a5580c7f7a6d078696458d283df5d6547ad1c740.zip | |
tools lib bpf: Add flags to bpf_create_map()
Commit 6c905981743 ("bpf: pre-allocate hash map elements") introduces
map_flags to bpf_attr for BPF_MAP_CREATE command. Expose this new
parameter in libbpf.
By exposing it, users can access flags such as whether or not to
preallocate the map.
Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209024620.31660-4-joe@ovn.org
[ Added clarifying comment made by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/bpf.c | 3 | ||||
| -rw-r--r-- | tools/lib/bpf/bpf.h | 2 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 3 |
3 files changed, 5 insertions, 3 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 89e8e8e5b60e..d0afb26c2e0f 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -54,7 +54,7 @@ static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr, } int bpf_create_map(enum bpf_map_type map_type, int key_size, - int value_size, int max_entries) + int value_size, int max_entries, __u32 map_flags) { union bpf_attr attr; @@ -64,6 +64,7 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size, attr.key_size = key_size; attr.value_size = value_size; attr.max_entries = max_entries; + attr.map_flags = map_flags; return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); } diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 61130170a6ad..7fcdce16fd62 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -24,7 +24,7 @@ #include <linux/bpf.h> int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size, - int max_entries); + int max_entries, __u32 map_flags); /* Recommend log buffer size */ #define BPF_LOG_BUF_SIZE 65536 diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 2e974593f3e8..84e6b35da4bd 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -854,7 +854,8 @@ bpf_object__create_maps(struct bpf_object *obj) *pfd = bpf_create_map(def->type, def->key_size, def->value_size, - def->max_entries); + def->max_entries, + 0); if (*pfd < 0) { size_t j; int err = *pfd; |