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author | Alexei Starovoitov <ast@kernel.org> | 2021-12-01 21:10:33 +0300 |
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committer | Andrii Nakryiko <andrii@kernel.org> | 2021-12-02 22:18:35 +0300 |
commit | be05c94476f3cf4fdc29feab4ed1053187323296 (patch) | |
tree | 31e84f0d56868119c04b4ef7f6e9b345d00e1d26 /tools/lib/bpf/gen_loader.c | |
parent | d0e928876e30b18411b80fd2445424bc00e95745 (diff) | |
download | linux-be05c94476f3cf4fdc29feab4ed1053187323296.tar.xz |
libbpf: Support init of inner maps in light skeleton.
Add ability to initialize inner maps in light skeleton.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-11-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools/lib/bpf/gen_loader.c')
-rw-r--r-- | tools/lib/bpf/gen_loader.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/lib/bpf/gen_loader.c b/tools/lib/bpf/gen_loader.c index 87d385e892ab..ed0e949790da 100644 --- a/tools/lib/bpf/gen_loader.c +++ b/tools/lib/bpf/gen_loader.c @@ -1053,6 +1053,33 @@ void bpf_gen__map_update_elem(struct bpf_gen *gen, int map_idx, void *pvalue, emit_check_err(gen); } +void bpf_gen__populate_outer_map(struct bpf_gen *gen, int outer_map_idx, int slot, + int inner_map_idx) +{ + int attr_size = offsetofend(union bpf_attr, flags); + int map_update_attr, key; + union bpf_attr attr; + + memset(&attr, 0, attr_size); + pr_debug("gen: populate_outer_map: outer %d key %d inner %d\n", + outer_map_idx, slot, inner_map_idx); + + key = add_data(gen, &slot, sizeof(slot)); + + map_update_attr = add_data(gen, &attr, attr_size); + move_blob2blob(gen, attr_field(map_update_attr, map_fd), 4, + blob_fd_array_off(gen, outer_map_idx)); + emit_rel_store(gen, attr_field(map_update_attr, key), key); + emit_rel_store(gen, attr_field(map_update_attr, value), + blob_fd_array_off(gen, inner_map_idx)); + + /* emit MAP_UPDATE_ELEM command */ + emit_sys_bpf(gen, BPF_MAP_UPDATE_ELEM, map_update_attr, attr_size); + debug_ret(gen, "populate_outer_map outer %d key %d inner %d", + outer_map_idx, slot, inner_map_idx); + emit_check_err(gen); +} + void bpf_gen__map_freeze(struct bpf_gen *gen, int map_idx) { int attr_size = offsetofend(union bpf_attr, map_fd); |