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libbpf: add map_get_fd_by_id and map_delete_elem in light skeleton

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This allows to have a better control over maps from the kernel when
preloading eBPF programs.

Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20220824134055.1328882-8-benjamin.tissoires@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Benjamin Tissoires 2022-08-24 15:40:37 +02:00 committed by Alexei Starovoitov
parent b88df69796
commit 343949e107
1 changed files with 23 additions and 0 deletions
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23
tools/lib/bpf/skel_internal.h
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@ -251,6 +251,29 @@ static inline int skel_map_update_elem(int fd, const void *key,
return skel_sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);
}
static inline int skel_map_delete_elem(int fd, const void *key)
{
const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
memset(&attr, 0, attr_sz);
attr.map_fd = fd;
attr.key = (long)key;
return skel_sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz);
}
static inline int skel_map_get_fd_by_id(__u32 id)
{
const size_t attr_sz = offsetofend(union bpf_attr, flags);
union bpf_attr attr;
memset(&attr, 0, attr_sz);
attr.map_id = id;
return skel_sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, attr_sz);
}
static inline int skel_raw_tracepoint_open(const char *name, int prog_fd)
{
const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint.prog_fd);