Messages in this thread Patch in this message | | | From | Wang Nan <> | Subject | [PATCH 06/10] bpf tools: Support new map operations | Date | Thu, 17 Dec 2015 05:23:10 +0000 |
| |
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> --- 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..89c9d0b 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
| |