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libbpf: Support resizable hashtable

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Add BPF_MAP_TYPE_RHASH to libbpf's map type name table and feature
probing so that libbpf-based tools can create and identify resizable
hash maps.

Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260605-rhash-v7-8-5b8e05f8630d@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Mykyta Yatsenko 2026-06-05 04:41:25 -07:00 committed by Alexei Starovoitov
parent 9dcbb5045f
commit 6e46ff0abe
2 changed files with 4 additions and 0 deletions
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1
tools/lib/bpf/libbpf.c
View File

@ -192,6 +192,7 @@ static const char * const map_type_name[] = {
[BPF_MAP_TYPE_CGRP_STORAGE] = "cgrp_storage",
[BPF_MAP_TYPE_ARENA] = "arena",
[BPF_MAP_TYPE_INSN_ARRAY] = "insn_array",
[BPF_MAP_TYPE_RHASH] = "rhash",
};
static const char * const prog_type_name[] = {

3
tools/lib/bpf/libbpf_probes.c
View File

@ -309,6 +309,9 @@ static int probe_map_create(enum bpf_map_type map_type)
value_size = sizeof(__u64);
opts.map_flags = BPF_F_NO_PREALLOC;
break;
case BPF_MAP_TYPE_RHASH:
opts.map_flags = BPF_F_NO_PREALLOC;
break;
case BPF_MAP_TYPE_CGROUP_STORAGE:
case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE:
key_size = sizeof(struct bpf_cgroup_storage_key);