[v3,bpf-next,05/14] libbpf: add BPF token support to bpf_map_create() API

Commit Message

Andrii Nakryiko June 21, 2023, 11:38 p.m. UTC

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

Also wire through token_create.allowed_map_types param for
BPF_TOKEN_CREATE command.

Signed-off-by: Andrii Nakryiko <[e-mail]>
---
 tools/lib/bpf/bpf.c | 5 ++++-
 tools/lib/bpf/bpf.h | 7 +++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

Patch

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index a247a1612f29..882297b1e136 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -169,7 +169,7 @@  int bpf_map_create(enum bpf_map_type map_type,
 		   __u32 max_entries,
 		   const struct bpf_map_create_opts *opts)
 {
-	const size_t attr_sz = offsetofend(union bpf_attr, map_extra);
+	const size_t attr_sz = offsetofend(union bpf_attr, map_token_fd);
 	union bpf_attr attr;
 	int fd;
 
@@ -198,6 +198,8 @@  int bpf_map_create(enum bpf_map_type map_type,
 	attr.numa_node = OPTS_GET(opts, numa_node, 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);
 	return libbpf_err_errno(fd);
 }
@@ -1218,6 +1220,7 @@  int bpf_token_create(int pin_path_fd, const char *pin_pathname, struct bpf_token
 	attr.token_create.token_flags = OPTS_GET(opts, token_flags, 0);
 	attr.token_create.pin_flags = OPTS_GET(opts, pin_flags, 0);
 	attr.token_create.allowed_cmds = OPTS_GET(opts, allowed_cmds, 0);
+	attr.token_create.allowed_map_types = OPTS_GET(opts, allowed_map_types, 0);
 
 	ret = sys_bpf(BPF_TOKEN_CREATE, &attr, attr_sz);
 	return libbpf_err_errno(ret);
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index ab0355d90a2c..cd3fb5ce6fe2 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -51,8 +51,10 @@  struct bpf_map_create_opts {
 
 	__u32 numa_node;
 	__u32 map_ifindex;
+
+	__u32 token_fd;
 };
-#define bpf_map_create_opts__last_field map_ifindex
+#define bpf_map_create_opts__last_field token_fd
 
 LIBBPF_API int bpf_map_create(enum bpf_map_type map_type,
 			      const char *map_name,
@@ -557,9 +559,10 @@  struct bpf_token_create_opts {
 	__u32 token_flags;
 	__u32 pin_flags;
 	__u64 allowed_cmds;
+	__u64 allowed_map_types;
 	size_t :0;
 };
-#define bpf_token_create_opts__last_field allowed_cmds
+#define bpf_token_create_opts__last_field allowed_map_types
 
 /**
  * @brief **bpf_token_create()** creates a new instance of BPF token, pinning