From: "Mauricio Vásquez" <mauricio@kinvolk.io>
To: netdev@vger.kernel.org, bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Quentin Monnet <quentin@isovalent.com>,
Rafael David Tinoco <rafaeldtinoco@gmail.com>,
Lorenzo Fontana <lorenzo.fontana@elastic.co>,
Leonardo Di Donato <leonardo.didonato@elastic.co>
Subject: [PATCH bpf-next v4 5/8] bpftool: Add struct definitions and helpers for BTFGen
Date: Wed, 12 Jan 2022 09:27:06 -0500 [thread overview]
Message-ID: <20220112142709.102423-6-mauricio@kinvolk.io> (raw)
In-Reply-To: <20220112142709.102423-1-mauricio@kinvolk.io>
Add some structs and helpers that will be used by BTFGen in the next
commits.
Signed-off-by: Mauricio Vásquez <mauricio@kinvolk.io>
Signed-off-by: Rafael David Tinoco <rafael.tinoco@aquasec.com>
Signed-off-by: Lorenzo Fontana <lorenzo.fontana@elastic.co>
Signed-off-by: Leonardo Di Donato <leonardo.didonato@elastic.co>
---
tools/bpf/bpftool/gen.c | 75 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+)
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 5a74fb68dc84..905ab0ee6542 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -1126,6 +1126,81 @@ static int btf_save_raw(const struct btf *btf, const char *path)
return err;
}
+struct btfgen_type {
+ struct btf_type *type;
+ unsigned int id;
+};
+
+struct btfgen_info {
+ struct hashmap *types;
+ struct btf *src_btf;
+};
+
+static size_t btfgen_hash_fn(const void *key, void *ctx)
+{
+ return (size_t)key;
+}
+
+static bool btfgen_equal_fn(const void *k1, const void *k2, void *ctx)
+{
+ return k1 == k2;
+}
+
+static void *uint_as_hash_key(int x)
+{
+ return (void *)(uintptr_t)x;
+}
+
+static void btfgen_free_type(struct btfgen_type *type)
+{
+ free(type);
+}
+
+static void btfgen_free_info(struct btfgen_info *info)
+{
+ struct hashmap_entry *entry;
+ size_t bkt;
+
+ if (!info)
+ return;
+
+ if (!IS_ERR_OR_NULL(info->types)) {
+ hashmap__for_each_entry(info->types, entry, bkt) {
+ btfgen_free_type(entry->value);
+ }
+ hashmap__free(info->types);
+ }
+
+ btf__free(info->src_btf);
+
+ free(info);
+}
+
+static struct btfgen_info *
+btfgen_new_info(const char *targ_btf_path)
+{
+ struct btfgen_info *info;
+
+ info = calloc(1, sizeof(*info));
+ if (!info)
+ return NULL;
+
+ info->src_btf = btf__parse(targ_btf_path, NULL);
+ if (libbpf_get_error(info->src_btf)) {
+ btfgen_free_info(info);
+ return NULL;
+ }
+
+ info->types = hashmap__new(btfgen_hash_fn, btfgen_equal_fn, NULL);
+ if (IS_ERR(info->types)) {
+ errno = -PTR_ERR(info->types);
+ btfgen_free_info(info);
+ return NULL;
+ }
+
+ return info;
+}
+
/* Create BTF file for a set of BPF objects */
static int btfgen(const char *src_btf, const char *dst_btf, const char *objspaths[])
{
--
2.25.1
next prev parent reply other threads:[~2022-01-12 14:27 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-12 14:27 [PATCH bpf-next v4 0/8] libbpf: Implement BTFGen Mauricio Vásquez
2022-01-12 14:27 ` [PATCH bpf-next v4 1/8] libbpf: split bpf_core_apply_relo() Mauricio Vásquez
2022-01-15 2:01 ` Andrii Nakryiko
2022-01-21 20:40 ` Mauricio Vásquez Bernal
2022-01-12 14:27 ` [PATCH bpf-next v4 2/8] libbpf: Implement changes needed for BTFGen in bpftool Mauricio Vásquez
2022-01-12 18:08 ` Quentin Monnet
2022-01-21 20:44 ` Mauricio Vásquez Bernal
2022-01-15 2:04 ` Andrii Nakryiko
2022-01-12 14:27 ` [PATCH bpf-next v4 3/8] bpftool: Add gen btf command Mauricio Vásquez
2022-01-12 18:08 ` Quentin Monnet
2022-01-21 20:40 ` Mauricio Vásquez Bernal
2022-01-21 21:35 ` Andrii Nakryiko
2022-01-15 2:09 ` Andrii Nakryiko
2022-01-21 20:44 ` Mauricio Vásquez Bernal
2022-01-12 14:27 ` [PATCH bpf-next v4 4/8] bpftool: Implement btf_save_raw() Mauricio Vásquez
2022-01-15 2:10 ` Andrii Nakryiko
2022-01-21 20:45 ` Mauricio Vásquez Bernal
2022-01-12 14:27 ` Mauricio Vásquez [this message]
2022-01-12 14:27 ` [PATCH bpf-next v4 6/8] bpftool: Implement btfgen() Mauricio Vásquez
2022-01-12 18:09 ` Quentin Monnet
2022-01-15 2:15 ` Andrii Nakryiko
2022-01-12 14:27 ` [PATCH bpf-next v4 7/8] bpftool: Implement relocations recording for BTFGen Mauricio Vásquez
2022-01-12 18:09 ` Quentin Monnet
2022-01-12 14:27 ` [PATCH bpf-next v4 8/8] bpftool: Implement btfgen_get_btf() Mauricio Vásquez
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