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Fri, 24 Apr 2026 12:51:14 -0700 (PDT) Received: from localhost ([2a03:2880:30ff:40::]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488fc10777csm688716135e9.8.2026.04.24.12.51.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Apr 2026 12:51:13 -0700 (PDT) From: Mykyta Yatsenko Date: Fri, 24 Apr 2026 12:50:48 -0700 Subject: [PATCH bpf-next v3 06/10] libbpf: Support resizable hashtable Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260424-rhash-v3-6-d0fa0ce4379b@meta.com> References: <20260424-rhash-v3-0-d0fa0ce4379b@meta.com> In-Reply-To: <20260424-rhash-v3-0-d0fa0ce4379b@meta.com> To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kafai@meta.com, kernel-team@meta.com, eddyz87@gmail.com, memxor@gmail.com, herbert@gondor.apana.org.au Cc: Mykyta Yatsenko , Emil Tsalapatis X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1777060253; l=1414; i=yatsenko@meta.com; s=20260324; h=from:subject:message-id; bh=yQetShQhNgsojC6nDckqJCqcq22GlvGv8ocTN1w3B6A=; b=NUgpd4VKl9g22+tDOEunNo47CE95mCg/N8MzDiMNAQ7LOjVmF7rZxuIakLBO4T6XA47JSB7P0 tms8iTbWR/zCEAWyPcNO80RG451hu0IObN3YGTgxktYCNgyRGI9QUKS X-Developer-Key: i=yatsenko@meta.com; a=ed25519; pk=1zCUBXUa66KmzfjNsG8YNlMj2ckPdqBPvFq2ww3/YaA= From: Mykyta Yatsenko 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 Reviewed-by: Emil Tsalapatis --- tools/lib/bpf/libbpf.c | 1 + tools/lib/bpf/libbpf_probes.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 83aae7a39d36..b8dd0c09841a 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -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[] = { diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c index b70d9637ecf5..e40819465ddc 100644 --- a/tools/lib/bpf/libbpf_probes.c +++ b/tools/lib/bpf/libbpf_probes.c @@ -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); -- 2.52.0