From: Wang Nan <[email protected]> Add more BPF map operations to libbpf. Also add bpf_obj_{pin,get}(). They can be used on not only BPF maps but also BPF programs.
Signed-off-by: Wang Nan <[email protected]> Acked-by: Alexei Starovoitov <[email protected]> Cc: He Kuang <[email protected]> Cc: Joe Stringer <[email protected]> Cc: Zefan Li <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/lib/bpf/bpf.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/bpf.h | 7 +++++++ 2 files changed, 63 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 4212ed62235b..8143536b462a 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -110,3 +110,59 @@ 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; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.key = ptr_to_u64(key); + attr.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; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.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; + + bzero(&attr, sizeof(attr)); + attr.map_fd = fd; + attr.key = ptr_to_u64(key); + attr.next_key = ptr_to_u64(next_key); + + return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr)); +} + +int bpf_obj_pin(int fd, const char *pathname) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.pathname = ptr_to_u64((void *)pathname); + attr.bpf_fd = fd; + + return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr)); +} + +int bpf_obj_get(const char *pathname) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.pathname = ptr_to_u64((void *)pathname); + + return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr)); +} diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index e8ba54087497..253c3dbb06b4 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -35,4 +35,11 @@ int bpf_load_program(enum bpf_prog_type type, 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); +int bpf_obj_pin(int fd, const char *pathname); +int bpf_obj_get(const char *pathname); + #endif -- 2.9.3
