@@ -357,6 +357,19 @@ int bpf_map_lookup_elem(int fd, const void *key, void *value)
return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
}
+int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
+{
+ union bpf_attr attr;
+
+ bzero(&attr, sizeof(attr));
+ attr.map_fd = fd;
+ attr.key = ptr_to_u64(key);
+ attr.value = ptr_to_u64(value);
+ attr.flags = flags;
+
+ return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
+}
+
int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value)
{
union bpf_attr attr;
@@ -110,6 +110,8 @@ LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
__u64 flags);
LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
+LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value,
+ __u64 flags);
LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
void *value);
LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
@@ -124,3 +124,7 @@ LIBBPF_0.0.1 {
local:
*;
};
+LIBBPF_0.0.2 {
+ global:
+ bpf_map_lookup_elem_flags;
+} LIBBPF_0.0.1;
Introduce int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags) helper to lookup array/hash/cgroup_local_storage elements with BPF_F_LOCK flag. Signed-off-by: Alexei Starovoitov <ast@kernel.org> --- tools/lib/bpf/bpf.c | 13 +++++++++++++ tools/lib/bpf/bpf.h | 2 ++ tools/lib/bpf/libbpf.map | 4 ++++ 3 files changed, 19 insertions(+)