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libbpf: Add BPF token support to bpf_map_create() API

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Add ability to provide token_fd for BPF_MAP_CREATE command through
bpf_map_create() API.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20240124022127.2379740-14-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2024-01-23 18:21:10 -08:00
committed by Andrii Nakryiko
parent 5cc8482fe2
commit 8002c052f3
2 changed files with 7 additions and 4 deletions
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5
src/bpf.c
View File

@@ -169,8 +169,7 @@ int bpf_map_create(enum bpf_map_type map_type,
__u32 max_entries, __u32 max_entries,
const struct bpf_map_create_opts *opts) const struct bpf_map_create_opts *opts)
{ {
const size_t attr_sz = offsetofend(union bpf_attr, const size_t attr_sz = offsetofend(union bpf_attr, map_token_fd);
value_type_btf_obj_fd);
union bpf_attr attr; union bpf_attr attr;
int fd; int fd;
@@ -200,6 +199,8 @@ int bpf_map_create(enum bpf_map_type map_type,
attr.numa_node = OPTS_GET(opts, numa_node, 0); attr.numa_node = OPTS_GET(opts, numa_node, 0);
attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0); attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0);
attr.map_token_fd = OPTS_GET(opts, token_fd, 0);
fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz); fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz);
return libbpf_err_errno(fd); return libbpf_err_errno(fd);
} }

6
src/bpf.h
View File

@@ -52,9 +52,11 @@ struct bpf_map_create_opts {
__u32 numa_node; __u32 numa_node;
__u32 map_ifindex; __u32 map_ifindex;
__s32 value_type_btf_obj_fd; __s32 value_type_btf_obj_fd;
size_t:0;
__u32 token_fd;
size_t :0;
}; };
#define bpf_map_create_opts__last_field value_type_btf_obj_fd #define bpf_map_create_opts__last_field token_fd
LIBBPF_API int bpf_map_create(enum bpf_map_type map_type, LIBBPF_API int bpf_map_create(enum bpf_map_type map_type,
const char *map_name, const char *map_name,